KLOT [240344]: Preliminary Local Storm Report

NWUS53 KLOT 240344
LSRLOT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1044 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1040 PM TSTM WND GST PONTIAC 40.88N 88.64W
04/23/2009 M43 MPH LIVINGSTON IL TRAINED SPOTTER

NO DAMAGE.

&&

$$

RATZER

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KFFC [240323]: Preliminary Local Storm Report

NWUS52 KFFC 240323
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1123 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0815 PM HAIL STONE MOUNTAIN 33.80N 84.17W
04/23/2009 E0.75 INCH DEKALB GA PUBLIC

&&

$$

JLF

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KDLH [240316]: Preliminary Local Storm Report

NWUS53 KDLH 240316
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1016 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0957 PM HAIL BROOKSTON 46.87N 92.60W
04/23/2009 E0.75 INCH ST. LOUIS MN AMATEUR RADIO

ON HIGHWAY 2

&&

$$

DONOFRIO

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KFFC [240309]: Preliminary Local Storm Report

NWUS52 KFFC 240309
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1108 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0815 PM HAIL FOREST PARK 33.62N 84.36W
04/23/2009 E1.75 INCH CLAYTON GA LAW ENFORCEMENT

&&

$$

JLF

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KFFC [240303]: Preliminary Local Storm Report

NWUS52 KFFC 240303
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1103 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0909 PM LIGHTNING LILBURN 33.89N 84.14W
04/23/2009 GWINNETT GA COUNTY OFFICIAL

HOUSE FIRE FROM LIGHTNING STRIKE ON RIVERWALK TRAIL OFF
OF ANNISTOWN ROAD IN LILBURN. ROOF COLLAPSED AND THE
HOUSE WAS DESTROYED.

&&

$$

JLF

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KFFC [240255]: Preliminary Local Storm Report

NWUS52 KFFC 240255
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1055 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0930 PM HAIL 2 W CALHOUN 34.49N 84.98W
04/23/2009 E0.75 INCH GORDON GA COUNTY OFFICIAL

&&

$$

JLF

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KFFC [240246]: Preliminary Local Storm Report

NWUS52 KFFC 240246
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1046 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1030 PM HAIL GRAY 33.01N 83.54W
04/23/2009 E0.75 INCH JONES GA PUBLIC

&&

$$

JLF

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KFFC [240243]: Preliminary Local Storm Report

NWUS52 KFFC 240243
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1043 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0930 PM HAIL MONROE 33.79N 83.71W
04/23/2009 E0.88 INCH WALTON GA COUNTY OFFICIAL

0950 PM HAIL COLBERT 34.04N 83.21W
04/23/2009 E1.75 INCH MADISON GA COUNTY OFFICIAL

HAIL LASTED ABOUT 12 MINUTES.

1000 PM HAIL EATONTON 33.32N 83.39W
04/23/2009 E0.75 INCH PUTNAM GA COUNTY OFFICIAL

1025 PM HAIL 10 N FORSYTH 33.18N 83.94W
04/23/2009 E0.88 INCH MONROE GA PUBLIC

&&

$$

JLF

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KFFC [240213]: Preliminary Local Storm Report

NWUS52 KFFC 240213
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1013 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1006 PM HAIL MADISON 33.58N 83.48W
04/23/2009 E0.75 INCH MORGAN GA PUBLIC

&&

$$

JLF

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KFFC [240209]: Preliminary Local Storm Report

NWUS52 KFFC 240209
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1009 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0919 PM HAIL 7 N MONROE 33.90N 83.71W
04/23/2009 E1.00 INCH WALTON GA PUBLIC

0920 PM HAIL 4 NE JONESBORO 33.56N 84.30W
04/23/2009 E1.00 INCH CLAYTON GA PUBLIC

HAIL LASTED ABOUT 20 MINUTES.

0935 PM HAIL STOCKBRIDGE 33.55N 84.24W
04/23/2009 E1.00 INCH HENRY GA PUBLIC

HAIL LASTED ABOUT 10 MINUTES.

&&

$$

JLF

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KGGW [240205]: Preliminary Local Storm Report

NWUS55 KGGW 240205
LSRGGW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
805 PM MDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0705 PM SNOW SSE WINNETT 47.00N 108.35W
04/23/2009 E2.5 INCH PETROLEUM MT TRAINED SPOTTER

2 TO 3 INCHES ON CAR ROOFS. STREETS ARE BARE.

0800 PM SNOW SW JORDAN 47.32N 106.91W
04/23/2009 M5.0 INCH GARFIELD MT TRAINED SPOTTER

ON CAR ROOFS. BARE GROUND.

&&

$$

TFJ

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KFFC [240200]: Preliminary Local Storm Report

NWUS52 KFFC 240200
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1000 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0930 PM HAIL AUBURN 34.01N 83.83W
04/23/2009 E1.75 INCH BARROW GA PUBLIC

GOLF BALL SIZED HAIL 1 MILE FROM HWY 29 ON HWY 316. HAIL
LASTED 10 MINUTES.

0950 PM HAIL FORSYTH 33.03N 83.94W
04/23/2009 E1.00 INCH MONROE GA PUBLIC

0950 PM HAIL MCDONOUGH 33.45N 84.14W
04/23/2009 E0.75 INCH HENRY GA PUBLIC

&&

$$

JLF

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KFFC [240150]: Preliminary Local Storm Report

NWUS52 KFFC 240150
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
949 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0715 PM HAIL 6 S DOUGLASVILLE 33.66N 84.75W
04/23/2009 E1.75 INCH DOUGLAS GA PUBLIC

0815 PM HAIL 5 NE ACWORTH 34.11N 84.61W
04/23/2009 E1.75 INCH CHEROKEE GA PUBLIC

0815 PM HAIL STONE MOUNTAIN 33.80N 84.17W
04/23/2009 E1.75 INCH DEKALB GA LAW ENFORCEMENT

0840 PM HAIL DACULA 33.98N 83.89W
04/23/2009 E0.75 INCH GWINNETT GA PUBLIC

PENNY SIZED HAIL FROM 840-900 PM.

0900 PM HAIL COVINGTON 33.60N 83.85W
04/23/2009 E0.75 INCH NEWTON GA PUBLIC

0900 PM HAIL MORROW 33.58N 84.34W
04/23/2009 E1.75 INCH CLAYTON GA NWS EMPLOYEE

QUARTER TO GOLF BALL SIZED HAIL FROM 900 TO 920 PM.

0910 PM HAIL 4 N ATLANTA 33.82N 84.42W
04/23/2009 E0.75 INCH FULTON GA PUBLIC

PENNY SIZED HAIL IN THE MIDTOWN AREA.

0910 PM HAIL DACULA 33.98N 83.89W
04/23/2009 E1.50 INCH GWINNETT GA PUBLIC

0913 PM HAIL AUBURN 34.01N 83.83W
04/23/2009 E1.00 INCH BARROW GA LAW ENFORCEMENT

0920 PM HAIL ATLANTA 33.76N 84.42W
04/23/2009 E1.75 INCH FULTON GA EMERGENCY MNGR

GOLF BALL SIZED HAIL AT TURNER FIELD.

0920 PM HAIL 1 W BOLD SPRINGS 33.90N 83.82W
04/23/2009 E0.88 INCH WALTON GA PUBLIC

0929 PM HAIL 5 ENE JONESBORO 33.55N 84.27W
04/23/2009 E1.00 INCH HENRY GA TRAINED SPOTTER

&&

$$

JLF

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KFFC [240122]: Preliminary Local Storm Report

NWUS52 KFFC 240122
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
922 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0820 PM HAIL WOODSTOCK 34.10N 84.51W
04/23/2009 E1.75 INCH CHEROKEE GA PUBLIC

GOLF BALL SIZED HAIL BETWEEN JAMESON ROAD AND HWY 92.
ESTIMATED WIND GUST OF 60 MPH.

0855 PM HAIL 3 N MORROW 33.62N 84.34W
04/23/2009 E0.75 INCH CLAYTON GA PUBLIC

&&

$$

JLF

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KDLH [240118]: Preliminary Local Storm Report

NWUS53 KDLH 240118
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
817 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0813 PM HAIL 4 SE AITKIN 46.49N 93.65W
04/23/2009 M0.88 INCH AITKIN MN LAW ENFORCEMENT

&&

$$

DONOFRIO

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KOUN [240110]: Preliminary Local Storm Report

NWUS54 KOUN 240110
LSROUN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
810 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0807 PM HAIL 5 SE VERDEN 35.03N 98.02W
04/23/2009 E0.75 INCH GRADY OK PUBLIC

&&

$$

CRILEY

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KFFC [240109]: Preliminary Local Storm Report

NWUS52 KFFC 240109
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
909 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0800 PM HAIL ACWORTH 34.06N 84.68W
04/23/2009 E1.00 INCH COBB GA PUBLIC

0805 PM HAIL 6 NE ACWORTH 34.12N 84.60W
04/23/2009 E1.00 INCH CHEROKEE GA PUBLIC

0814 PM HAIL WOODSTOCK 34.10N 84.51W
04/23/2009 E0.75 INCH CHEROKEE GA PUBLIC

PENNY SIZED HAIL AT 92 AND 575.

0833 PM HAIL ROSWELL 34.04N 84.36W
04/23/2009 E1.00 INCH FULTON GA PUBLIC

0835 PM HAIL SNELLVILLE 33.86N 84.01W
04/23/2009 E1.25 INCH GWINNETT GA PUBLIC

0835 PM HAIL LILBURN 33.89N 84.14W
04/23/2009 E1.00 INCH GWINNETT GA AMATEUR RADIO

QUARTER SIZED HAIL AT LAWRENCEVILLE HIGHWAY AND PLEASANT
HILL ROAD.

&&

$$

JLF

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 240101
SWODY1
SPC AC 240058

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0758 PM CDT THU APR 23 2009

VALID 240100Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
PROGRESSIVE UPPER AIR PATTERN CONTINUES ACROSS CONUS...WITH SERIES
OF SHORTWAVES OF VARYING AMPLITUDE IN NRN AND SRN STREAMS.
PERTURBATION NOW OVER NM...FAR W TX AND CHIHUAHUA IS FCST TO MOVE
EWD ACROSS W TX OVERNIGHT...REACHING SW OK AND CENTRAL TX BY END OF
PERIOD. MEANWHILE...COMPACT SHORTWAVE TROUGH AND EMBEDDED MVC --
INITIALLY OVER SERN IA/NWRN IL REGION -- SHOULD MOVE ENEWD TO SRN
LOWER MI. HIGH-AMPLITUDE/POSITIVELY-TILTED SHORTWAVE TROUGH -- NOW
EVIDENT IN MOISTURE CHANNEL IMAGERY ACROSS SRN AB...WA AND WRN ORE
-- IS EXPECTED TO MOVE TO SWRN SASK...W-CENTRAL ID AND EXTREME NWRN
CA BY 12Z...WITH EMBEDDED 500 MB LOW DEVELOPING INVOF NWRN CA COAST.

AT SFC...COLD FRONT ANALYZED AT 23Z FROM NWRN MN SWWD ACROSS WRN SD
WILL CONTINUE TO SAG SWD ACROSS MN AND MOST OF SD BY END OF PERIOD.
SFC REFLECTION OF MVC -- INITIALLY INVOF SERN CORNER IA -- WILL MOVE
ENEWD WITH MIDLEVEL PERTURBATION. WARM FRONTAL ZONE -- ANALYZED
FROM THIS LOW SEWD ACROSS MID TN AND NRN GA -- SHOULD DRIFT NWD
THROUGH REST OF PERIOD.

...SRN APPALACHIANS/PIEDMONT...
SCATTERED MULTICELLULAR TSTMS IN CLUSTERS SHOULD MOVE SEWD ACROSS
PORTIONS NRN /CENTRAL GA FOR ANOTHER FEW HOURS WITH POTENTIAL FOR
OCCASIONAL HAIL OF MRGL SVR SIZE. ACTIVITY IS SUPPORTED BY STEEP
MIDLEVEL LAPSE RATES ASSOCIATED WITH ERN TONGUE OF EML PLUME...AND
LOW 60S F SFC DEW POINTS CONTRIBUTING TO MLCAPE 800-1200 J/KG.
ALTHOUGH SFC-BASED LIFTED PARCELS WILL CONTINUE TO BECOME MORE
STABLE WITH DIABATIC COOLING...ACTIVITY MAY CONGEAL INTO
FORWARD-PROPAGATING SMALL MCS WITH SHORT-LIVED POTENTIAL FOR
DAMAGING GUSTS APCHG 50 KT SVR CRITERIA...BASED ON DRY/WELL-MIXED
SUBCLOUD AIR EVIDENT IN FFC SOUNDING.

...IL...
SVR POTENTIAL FCST TO DIMINISH THROUGH LATE EVENING AS BOUNDARY
LAYER INSTABILITY WEAKENS...BUT ISOLATED HAIL/GUSTS ARE POSSIBLE IN
MEANTIME. REF SPC MESOSCALE DISCUSSION 549 FOR NOWCAST INFO.

...DAKOTAS/MN...
ISOLATED TO WIDELY SCATTERED TSTMS MAY PRODUCE HAIL INVOF SFC COLD
FRONT THROUGH LATE EVENING...IN REGIME CHARACTERIZED BY STG LOW
LEVEL WAA AND FAVORABLE LOW LEVEL SHEAR...BUT MRGL
MOISTURE/BUOYANCY.

...SW TX TO CENTRAL OK...
DRY/WELL-MIXED SUBCLOUD LAYERS WILL CONTRIBUTE TO POTENTIAL FOR
ADDITIONAL/ISOLATED STG-SVR GUSTS FROM HIGH-BASED CONVECTION OVER
REGION. POTENTIAL SHOULD DIMINISH AS NEAR-SFC STABLE LAYER DEEPENS
WITH CONTINUED SFC DIABATIC COOLING.

..EDWARDS.. 04/24/2009

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KTFX [240059]: Preliminary Local Storm Report

NWUS55 KTFX 240059
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
659 PM MDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0645 PM SNOW 8 SE BOZEMAN 45.60N 110.93W
04/23/2009 M6.0 INCH GALLATIN MT TRAINED SPOTTER

6 INCHES OF WET SNOW SINCE 3PM. 3 TO 4 INCHES OF SLUSH ON
ROADWAYS.

&&

$$

MSYNER

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KFFC [240046]: Preliminary Local Storm Report

NWUS52 KFFC 240046
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
846 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0800 PM HAIL MABLETON 33.82N 84.58W
04/23/2009 E1.25 INCH COBB GA PUBLIC

HAIL REPORTED AT A LOCATION ON TREE FERN WAY SE.

0815 PM HAIL COLLEGE PARK 33.64N 84.46W
04/23/2009 E1.00 INCH FULTON GA PUBLIC

0815 PM HAIL KENNESAW 34.02N 84.62W
04/23/2009 E0.75 INCH COBB GA PUBLIC

0822 PM HAIL MARIETTA 33.95N 84.54W
04/23/2009 E1.00 INCH COBB GA PUBLIC

&&

$$

JLF

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KFFC [240037]: Preliminary Local Storm Report

NWUS52 KFFC 240037
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
837 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0654 PM HAIL DOUGLASVILLE 33.75N 84.75W
04/23/2009 E0.75 INCH DOUGLAS GA PUBLIC

0730 PM HAIL 2 NW HOLLINGSWORTH 34.45N 83.53W
04/23/2009 E0.75 INCH BANKS GA COUNTY OFFICIAL

0740 PM HAIL 3 SE CARTERSVILLE 34.14N 84.76W
04/23/2009 E1.00 INCH BARTOW GA PUBLIC

0745 PM HAIL MABLETON 33.81N 84.56W
04/23/2009 E1.00 INCH COBB GA PUBLIC

0755 PM HAIL TUCKER 33.85N 84.22W
04/23/2009 E0.75 INCH DEKALB GA PUBLIC

0810 PM HAIL ACWORTH 34.06N 84.68W
04/23/2009 E1.00 INCH COBB GA PUBLIC

&&

$$

JLF

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KGSP [240024]: Preliminary Local Storm Report

NWUS52 KGSP 240024
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
824 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0730 PM HAIL 6 W BALDWIN 34.49N 83.66W
04/23/2009 E1.00 INCH HABERSHAM GA TRAINED SPOTTER

&&

$$

AKIMBALL

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KSLC [240023]: Preliminary Local Storm Report

NWUS55 KSLC 240023
LSRSLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
622 PM MDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0350 PM NON-TSTM WND GST ARAGONITE 40.76N 113.01W
04/23/2009 M59 MPH TOOELE UT MESONET

I-80 AT GRASSEY - 4650 FT

0410 PM NON-TSTM WND GST GOLD HILL 40.28N 113.70W
04/23/2009 M74 MPH TOOELE UT MESONET

WEST SALT FLATS - 4237 FT

0540 PM NON-TSTM WND GST NORDIC VLY 41.38N 111.78W
04/23/2009 M58 MPH WEBER UT MESONET

0550 PM NON-TSTM WND GST DUGWAY 39.92N 112.94W
04/23/2009 M61 MPH TOOELE UT MESONET

SIMPSON SPRINGS - 4645 FT

&&

$$

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KTFX [240019]: Preliminary Local Storm Report

NWUS55 KTFX 240019
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
619 PM MDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0545 PM SNOW SSE GALLATIN GATEWAY 45.59N 111.20W
04/23/2009 M4.0 INCH GALLATIN MT TRAINED SPOTTER

4 INCHES OF WET SNOW SINCE 3PM.

&&

$$

HOENISCH

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KFFC [240010]: Preliminary Local Storm Report

NWUS52 KFFC 240010
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
810 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0636 PM HAIL 3 WSW RESACA 34.57N 84.99W
04/23/2009 E0.88 INCH GORDON GA PUBLIC

0730 PM HAIL 1 E SMYRNA 33.87N 84.50W
04/23/2009 E0.75 INCH COBB GA PUBLIC

PENNY SIZED HAIL AT THE INTERSECTION OF I-75 AND I-285
NORTHWEST OF ATLANTA.

0740 PM HAIL CALHOUN 34.49N 84.94W
04/23/2009 E0.75 INCH GORDON GA PUBLIC

&&

$$

JLF

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MESO: Mesoscale Discussion 0549

ACUS11 KWNS 240008
SWOMCD
SPC MCD 240008
ILZ000-240145-

MESOSCALE DISCUSSION 0549
NWS STORM PREDICTION CENTER NORMAN OK
0708 PM CDT THU APR 23 2009

AREAS AFFECTED...WEST CENTRAL IL

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 240008Z - 240145Z

ISOLATED STRONG WIND GUSTS AND HAIL WILL BE POSSIBLE WITH THE
STRONGER STORMS THAT DEVELOP AND MOVE ENEWD ACROSS WEST CENTRAL IL
DURING THE EARLY EVENING.

AT 00Z...REGIONAL RADARS INDICATED SEVERAL CLUSTERS OF TSTMS
EXTENDING FROM HENDERSON/NRN HANCOCK COUNTIES IL TO STARK AND PEORIA
COUNTIES IL. STRONGEST LOW LEVEL CONVERGENCE PER OBJECTIVE ANALYSIS
WAS LOCATED ALONG THE WEST CENTRAL IL BORDER REGION WITH NERN MO
WHERE A SURFACE ANALYSIS INDICATED AN APPARENT MESO-LOW IN THIS
REGION...WHILE A BOUNDARY EXTENDED SEWD INTO FAR SRN IL. LOW LEVEL
CONVERGENCE ACROSS FAR NERN MO/WEST CENTRAL IL COUPLED WITH FORCING
FOR ASCENT CONFINED TO COMPACT MID LEVEL MCV IS RESULTING IN
STRONGEST TSTM INTENSITY WITH NEWEST ACTIVITY THAT DEVELOPS OVER FAR
WEST CENTRAL IL. LOW LEVEL MOISTURE/WAA MAXIMIZED ALONG THE NOSE OF
A 40-45 KT SSWLY LLJ IS FEEDING THE ACTIVITY FROM THE SW WHERE THE
AIR MASS IS MODERATELY UNSTABLE. THESE STORMS ARE LIKELY ELEVATED
GIVEN PRESENCE OF STRONG INHIBITION PER OBJECTIVE ANALYSES.

TSTMS THAT CONTINUE TO DEVELOP ALONG THE WRN PERIPHERY OF THIS
SYSTEM SHOULD BE THE STRONGEST GIVEN PROXIMITY TO GREATER
INSTABILITY FEED. EFFECTIVE BULK SHEAR OF 50-65 KT WILL SUPPORT
STORM ORGANIZATION. STEEP MID LEVEL LAPSE RATES /7-7.5 C/KM/ SHOULD
SUPPORT ISOLATED HAIL WITH THE STRONGER ACTIVITY...WITH LOCALIZED
STRONGER WIND GUSTS...GIVEN LINEAR STRUCTURE TO TSTM CLUSTERS. A
WEAKENING TREND WILL OCCUR AS STORMS MOVE FARTHER ENEWD INTO NORTH
CENTRAL IL WHERE SURFACE BASED INHIBITION IS GREATER AND INSTABILITY
WEAKER.

..PETERS.. 04/24/2009

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...ILX...DVN...

LAT...LON 40619110 40949081 41099012 40998974 40488982 40319025
40379079 40469103 40619110

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KFFC [232344]: Preliminary Local Storm Report

NWUS52 KFFC 232344
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
744 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0710 PM HAIL SMYRNA 33.87N 84.52W
04/23/2009 E1.00 INCH COBB GA PUBLIC

0718 PM HAIL ATLANTA 33.76N 84.42W
04/23/2009 E1.00 INCH FULTON GA PUBLIC

0733 PM HAIL SMYRNA 33.87N 84.52W
04/23/2009 E1.00 INCH COBB GA PUBLIC

&&

$$

JLF

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KOUN [232340]: Preliminary Local Storm Report

NWUS54 KOUN 232340
LSROUN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
639 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0608 PM TSTM WND GST 4 NE ALTUS 34.68N 99.28W
04/23/2009 M63.00 MPH JACKSON OK ASOS

MEASURED AT THE ASOS AT ALTUS AIR FORCE BASE.

0622 PM TSTM WND GST 3 SE HOBART 35.00N 99.05W
04/23/2009 M66.00 MPH KIOWA OK ASOS

PEAK WIND OF 57 KNOTS MEASURED ON THE ASOS SITE 3 MILES
SOUTHEAST OF HOBART. STILL GUSTING TO 46 KNOTS AS OF 633
PM CDT.

0625 PM TSTM WND GST 4 SE HOBART 34.99N 99.04W
04/23/2009 M58.00 MPH KIOWA OK MESONET

SUSTAINED WINDS OF 35 KNOTS...GUSTING TO 50
KNOTS...REPORTED ON THE HOBART MESONET SITE.

&&

$$

LAMERS

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KFFC [232328]: Preliminary Local Storm Report

NWUS52 KFFC 232328
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
728 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0725 PM HAIL 3 W VININGS 33.87N 84.52W
04/23/2009 E1.75 INCH COBB GA TRAINED SPOTTER

&&

$$

SNELSON

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KFFC [232316]: Preliminary Local Storm Report

NWUS52 KFFC 232316
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
716 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0710 PM HAIL POWDER SPRINGS 33.86N 84.68W
04/23/2009 E1.00 INCH COBB GA PUBLIC

&&

$$

SNELSON

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KFFC [232314]: Preliminary Local Storm Report

NWUS52 KFFC 232314
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
714 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0710 PM HAIL CALHOUN 34.50N 84.95W
04/23/2009 E0.75 INCH GORDON GA PUBLIC

&&

$$

SNELSON

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KFFC [232312]: Preliminary Local Storm Report

NWUS52 KFFC 232312
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
712 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0700 PM HAIL POWDER SPRINGS 33.86N 84.68W
04/23/2009 E0.88 INCH COBB GA PUBLIC

&&

$$

SNELSON

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KFFC [232301]: Preliminary Local Storm Report

NWUS52 KFFC 232301
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
701 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0645 PM HAIL RESACA 34.58N 84.94W
04/23/2009 E1.00 INCH GORDON GA PUBLIC

&&

$$

SNELSON

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KFFC [232257]: Preliminary Local Storm Report

NWUS52 KFFC 232257
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
657 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0650 PM HAIL 1 N CALHOUN 34.52N 84.95W
04/23/2009 E1.25 INCH GORDON GA PUBLIC

&&

$$

SNELSON

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KFFC [232232]: Preliminary Local Storm Report

NWUS52 KFFC 232232
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
632 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0630 PM HAIL 3 S DALLAS 33.88N 84.84W
04/23/2009 E1.00 INCH PAULDING GA EMERGENCY MNGR

&&

$$

SNELSON

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KFFC [232225]: Preliminary Local Storm Report

NWUS52 KFFC 232225
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
625 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0605 PM HAIL 7 SW CHICKAMAUGA 34.80N 85.38W
04/23/2009 E1.75 INCH WALKER GA PUBLIC

&&

$$

SNELSON

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MESO: Mesoscale Discussion 0548

ACUS11 KWNS 232212
SWOMCD
SPC MCD 232212
OKZ000-TXZ000-232315-

MESOSCALE DISCUSSION 0548
NWS STORM PREDICTION CENTER NORMAN OK
0512 PM CDT THU APR 23 2009

AREAS AFFECTED...PORTIONS OF WRN TX AND SW OK

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 232212Z - 232315Z

HIGH BASED THUNDERSTORMS SPREADING NEWD ACROSS PORTIONS OF W TX INTO
SW OK MAY POSE AN ISOLATED DAMAGING WIND THREAT. THE
MARGINAL/ISOLATED NATURE OF THE THREAT WILL PRECLUDE A WW.

A HOT WELL MIXED BOUNDARY LAYER AIRMASS...CHARACTERIZED BY SURFACE
TEMPERATURES IN THE 80S AND 90S...AND DEWPOINTS IN THE 30S WILL
FAVOR HIGH BASED THUNDERSTORM DEVELOPMENT AHEAD OF A S/W TROUGH OVER
NM. THE STRONGEST UPDRAFT CORES ARE EXPECTED TO OCCUR WITHIN THE
WELL MIXED PBL...WITH WEAKENING LIKELY AS THEY MOVE E-NEWD INTO A
MORE STRONGLY CAPPED ENVIRONMENT. THOUGH MLCAPE VALUES WILL BE LOW
/AOB 500 J PER KG/...THE HOT/DRY ENVIRONMENT AND RESULTANT HIGH
THUNDERSTORM BASES /GENERALLY AROUND 3-4 KM PER RUC SOUNDINGS/ WILL
FAVOR SUB-CLOUD EVAPORATIVE COOLING AND SUBLIMATION RESULTING IN
SOME POTENTIAL FOR ISOLATED DAMAGING DOWNDRAFTS. DUE TO GENERALLY
WEAK FLOW ALOFT...AN ORGANIZED SEVERE WEATHER THREAT IS NOT
ANTICIPATED...PRECLUDING WW ISSUANCE.

..GARNER.. 04/23/2009

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...OUN...SJT...LUB...AMA...MAF...

LAT...LON 33050289 33050291 33950171 34790014 34969925 34739874
33739898 32629987 31970110 32030231 32800283 33050289

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KFFC [232202]: Preliminary Local Storm Report

NWUS52 KFFC 232202
LSRFFC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
602 PM EDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0600 PM HAIL 7 SW CHICKAMAUGA 34.80N 85.38W
04/23/2009 E1.25 INCH WALKER GA PUBLIC

&&

$$

SNELSON

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KDDC [232138]: Preliminary Local Storm Report...summary

NWUS53 KDDC 232138
LSRDDC

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DODGE CITY KS
437 PM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0458 PM HAIL 3 NW TROUSDALE 37.83N 99.12W
04/22/2009 E0.88 INCH EDWARDS KS TRAINED SPOTTER

THE HAIL SIZE WAS REPORTED AS DIME TO NICKEL SIZE.

0500 PM HAIL TROUSDALE 37.80N 99.08W
04/22/2009 E1.75 INCH EDWARDS KS LAW ENFORCEMENT

0507 PM HAIL 3 SSE ROZEL 38.16N 99.38W
04/22/2009 M0.75 INCH PAWNEE KS PUBLIC

0511 PM HAIL 3 NW TROUSDALE 37.83N 99.12W
04/22/2009 E1.25 INCH EDWARDS KS TRAINED SPOTTER

QUARTER TO HALF DOLLAR SIZE HAIL WAS REPORTED AS VERY
SOFT.

0528 PM HAIL 3 NW TROUSDALE 37.83N 99.12W
04/22/2009 E1.25 INCH EDWARDS KS TRAINED SPOTTER

THE HAIL WAS REPORTED AS VERY SOFT. THE CALLER ALSO
REPORTED 0.36 INCH OF RAIN FROM THIS EVENING/S STORM.

0545 PM HAIL 16 SW ST. JOHN 37.84N 98.97W
04/22/2009 M1.00 INCH STAFFORD KS PUBLIC

0630 PM HAIL 10 SSW ST. JOHN 37.87N 98.83W
04/22/2009 M0.75 INCH STAFFORD KS PUBLIC

0648 PM HAIL 8 SSW ST. JOHN 37.89N 98.82W
04/22/2009 E1.00 INCH STAFFORD KS PUBLIC

0700 PM HAIL 15 ESE KINSLEY 37.84N 99.16W
04/22/2009 E0.75 INCH EDWARDS KS PUBLIC

0711 PM HAIL FELLSBURG 37.80N 99.18W
04/22/2009 E1.75 INCH EDWARDS KS LAW ENFORCEMENT

THE HAIL SIZE WAS REPORTED AS QUARTER TO GOLFBALL SIZE.

0740 PM HAIL TROUSDALE 37.80N 99.08W
04/22/2009 E1.00 INCH EDWARDS KS STORM CHASER

0753 PM HAIL 2 E HOPEWELL 37.80N 98.94W
04/22/2009 E1.00 INCH PRATT KS TRAINED SPOTTER

HAIL WAS REAL SOFT AND MUSHY.

0808 PM HAIL 1 NE BYERS 37.80N 98.85W
04/22/2009 E0.75 INCH PRATT KS PUBLIC

0818 PM HAIL BYERS 37.79N 98.87W
04/22/2009 E1.00 INCH PRATT KS EMERGENCY MNGR

0846 PM TSTM WND GST DODGE CITY 37.76N 100.01W
04/22/2009 M62.00 MPH FORD KS ASOS

THE WIND GUST WAS FROM THE AIRPORT.

0848 PM TSTM WND GST DODGE CITY 37.76N 100.01W
04/22/2009 M63.00 MPH FORD KS ASOS

0848 PM NON-TSTM WND GST 1 E DODGE CITY 37.76N 100.00W
04/22/2009 M62.00 MPH FORD KS ASOS

THIS OBS WAS FROM DDC ASOS, 230148Z 31039G54KT.

0852 PM TSTM WND GST DODGE CITY 37.76N 100.01W
04/22/2009 M63.00 MPH FORD KS ASOS

0859 PM TSTM WND GST S HANSTON 38.12N 99.71W
04/22/2009 E58.00 MPH HODGEMAN KS TRAINED SPOTTER

WIND GUSTS WERE ESTIMATED TO RANGE FROM 55 TO 60 MPH.

0906 PM TSTM WND GST 2 NE WINDTHORST 37.80N 99.60W
04/22/2009 E65.00 MPH FORD KS PUBLIC

WINDS GUSTS WERE ESTIMATED BETWEEN 65 TO 70 MPH.

0910 PM NON-TSTM WND GST KINSLEY 37.92N 99.41W
04/22/2009 M63.00 MPH EDWARDS KS BROADCAST MEDIA

THIS REPORT WAS FROM THE KSN-TV WEATHERLAB AT KINSLEY
ELEMENTARY SCHOOL.

&&

$$

BURKE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231238
SWODY1
SPC AC 231235

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0735 AM CDT THU APR 23 2009

VALID 231300Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
THE DEEP MID LEVEL TROUGH OVER NEW ENGLAND WILL LIFT NEWD AND STRONG
HEIGHT RISES ARE EXPECTED IN ITS WAKE BY TONIGHT...DOWNSTREAM FROM
ANOTHER POSITIVE TILT TROUGH WHICH WILL CONTINUE TO MOVE SLOWLY SEWD
ACROSS THE PAC NW AND NRN ROCKIES. A SEPARATE SMALLER SCALE WAVE
OVER ERN KS...WITHIN AN INTERMEDIATE FLOW STREAM...WILL PROGRESS
NEWD OVER MO/IL IN THE REGIME OF RISING HEIGHTS...WHILE ANOTHER SRN
STREAM TROUGH MOVES SLOWLY EWD ACROSS NRN MEXICO TO THE TX BIG BEND.

A RELATIVELY SHALLOW SURFACE MOIST LAYER WITH DEWPOINTS IN THE 50S
AND 60S IS RETURNING NWD ACROSS THE GULF COAST STATES AND SRN
PLAINS...ALONG AND S OF A WARM FRONT WHICH WILL LIFT NWD ACROSS THE
MID MS VALLEY. HOWEVER...LOW-LEVEL MOISTURE IS RATHER LIMITED
ACROSS MOST OF THE CONUS...AND INSTABILITY FOR DEEP CONVECTION WILL
BE DRIVEN LARGELY BY A BROAD PLUME OF STEEP LOW-MID LEVEL LAPSE
RATES EMANATING FROM THE INTERMOUNTAIN WEST...AND BY STRONG DAYTIME
HEATING/MIXING. THIS WILL SUPPORT A FEW AREAS OF MAINLY HIGH-BASED
THUNDERSTORM DEVELOPMENT DOWNSTREAM FROM THE AFOREMENTIONED
SHORTWAVE TROUGHS TODAY...AND A CONTINUING THREAT FOR ELEVATED
STORMS OVERNIGHT.

...GA AREA TODAY...
STRONG SURFACE HEATING AND SOME LOW-LEVEL MOISTENING WILL RESULT IN
THE DEVELOPMENT OF MODERATE INSTABILITY /MLCAPE OF 1000-1500 J/KG/
ALONG THE SLOW-MOVING WARM FRONT TODAY ACROSS GA. THE BACKGROUND
REGIME OF RISING HEIGHTS IS NOT SUPPORTIVE OF WIDESPREAD
THUNDERSTORM DEVELOPMENT...BUT ISOLATED STORMS COULD FORM THIS
AFTERNOON IN THE ZONE OF WEAK ASCENT AND SMALL CONVECTIVE INHIBITION
ALONG THE BOUNDARY. IF STORMS DO FORM...THE INSTABILITY AND 0-6 KM
BULK SHEAR AROUND 30 KT COULD SUPPORT MULTICELL CLUSTERS AND/OR
MARGINAL SUPERCELL STRUCTURES WITH A THREAT FOR LARGE HAIL.

...SW TX THIS AFTERNOON INTO TONIGHT...
LOW-LEVEL MOISTURE WILL BEGIN TO RETURN NWWD UP THE RIO GRANDE
VALLEY IN ADVANCE OF THE SRN STREAM TROUGH MOVING EWD OVER NRN
MEXICO...THOUGH DAYTIME MIXING WILL LIKELY OFFSET MOISTURE ADVECTION
THIS AFTERNOON. STILL...STEEP MID LEVEL LAPSE RATES AND STRONG
SURFACE HEATING IN THE WAKE OF MORNING CIRRUS WILL CONTRIBUTE TO
SUFFICIENT SURFACE-BASED INSTABILITY FOR HIGH-BASED STORMS CAPABLE
OF PRODUCING ISOLATED STRONG OUTFLOW GUSTS AND MARGINALLY SEVERE
HAIL. SOME OF THIS CONVECTION MAY PERSIST OVERNIGHT IN AN ELEVATED
WAA REGIME WITH INCREASING MOISTURE...AND A CONTINUED THREAT FOR
ISOLATED HAIL.

...NRN ROCKIES THIS AFTERNOON TO THE NRN PLAINS TONIGHT...
A SURFACE COLD FRONT WILL MOVE SEWD ACROSS THE NRN PLAINS IN
ASSOCIATION WITH A MID-UPPER SPEED MAX TRAVERSING MANITOBA.
LOW-LEVEL MOISTURE WILL INITIALLY BE QUITE LIMITED ACROSS THE NRN
PLAINS IN ADVANCE OF THE FRONT...THOUGH A GRADUAL INCREASE IN
MOISTURE IS EXPECTED NWD FROM THE ERN PART OF THE PLAINS STATES.
MEANWHILE...STEEP LAPSE RATES WILL CONTINUE OVER THIS AREA
DOWNSTREAM FROM THE PAC NW TROUGH...AND A PLUME OF MID LEVEL
MOISTURE WILL SPREAD ENEWD FROM THE NRN ROCKIES. CONVECTION WILL
BEGIN THIS AFTERNOON NEAR THE FRONT ACROSS ERN ID/WY/SE MT WITH AN
ATTENDANT THREAT FOR ISOLATED DAMAGING WINDS AND SOME HAIL.
CONVECTION IS THEN EXPECTED TO DEVELOP ENEWD AS ELEVATED STORMS ON
THE IMMEDIATE COOL SIDE OF THE FRONT THROUGH TONIGHT ACROSS THE
DAKOTAS/MN...WHERE MID LEVEL INSTABILITY WILL BE SUFFICIENT FOR
ISOLATED LARGE HAIL.

..THOMPSON/GRAMS.. 04/23/2009

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KICT [231001]: Preliminary Local Storm Report...summary

NWUS53 KICT 231001
LSRICT

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE WICHITA KS
501 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0615 PM TSTM WND GST GREAT BEND 38.36N 98.81W
04/22/2009 E60.00 MPH BARTON KS LAW ENFORCEMENT

60 MPH GUST ESTIMATED ON THE WEST SIDE OF GREAT BEND.

0945 PM HAIL 7 SE PARTRIDGE 37.90N 98.00W
04/22/2009 E1.00 INCH RENO KS TRAINED SPOTTER

1130 PM HAIL VALLEY CENTER 37.84N 97.37W
04/22/2009 E0.88 INCH SEDGWICK KS NWS EMPLOYEE

0121 AM HAIL ROSE HILL 37.57N 97.13W
04/23/2009 E0.75 INCH BUTLER KS COUNTY OFFICIAL

0138 AM TSTM WND GST BURNS 38.09N 96.89W
04/23/2009 E50.00 MPH MARION KS TRAINED SPOTTER

0151 AM TSTM WND GST 6 NNE EL DORADO LAKE 37.94N 96.75W
04/23/2009 E60.00 MPH BUTLER KS LAW ENFORCEMENT

50 TO 60 MPH WINDS AND PEA SIZED HAIL ALONG THE KANSAS
TURNPIKE AT MILE MARKER 85. FROM KTA.

&&

$$

BDK

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 230900
SWOD48
SPC AC 230859

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0359 AM CDT THU APR 23 2009

VALID 261200Z - 011200Z

...SEVERE STORMS POSSIBLE FROM PARTS OF THE S CNTRL PLAINS THROUGH
UPPER PORTIONS OF THE MID MS VALLEY INTO THE GREAT LAKES SUNDAY...

MEDIUM RANGE MODELS REMAIN IN REASONABLE AGREEMENT THROUGH THE
COMING WEEKEND...CONCERNING AT LEAST THE BASICS OF THE LARGE-SCALE
PATTERN EVOLUTION. WITHIN THE PREVAILING SPLIT UPPER FLOW...A
SIGNIFICANT UPPER IMPULSE IS PROGGED TO CONTINUE TO LIFT OUT OF THE
WESTERN TROUGH THROUGH THE UPPER MISSISSIPPI VALLEY/GREAT LAKES
REGION SUNDAY/SUNDAY NIGHT. THIS IS EXPECTED TO MAINTAIN STRONG
LIFT AND DEEP LAYER SHEAR NEAR A SLOW MOVING OR STALLED FRONTAL ZONE
EXTENDING FROM THE GREAT LAKES REGION THROUGH THE SOUTH CENTRAL HIGH
PLAINS. A NARROWING TONGUE OF STEEP MID-LEVEL LAPSE RATES WILL
PROBABLY LINGER AT LEAST ONE MORE DAY ON THE WESTERN PERIPHERY OF A
STRONG LOWER/MID TROPOSPHERIC RIDGE CENTERED NEAR SOUTH ATLANTIC
COASTAL AREAS. AS A MOIST GULF RETURN FLOW CONTINUES...THIS SHOULD
CONTRIBUTE TO SUFFICIENT INSTABILITY TO SUPPORT THE RISK FOR SEVERE
STORMS. ACTIVITY ALONG THE FRONT IS EXPECTED TO GENERALLY ORGANIZE
INTO LINES/CLUSTERS ...WITH DISCRETE SUPERCELLULAR STORMS PROBABLY
CONFINED TO THE VICINITY OF THE SOUTH CENTRAL HIGH PLAINS DRY LINE
LATE SUNDAY AFTERNOON/EVENING. THEREAFTER...LARGE MODEL SPREAD AND
THE UNCERTAIN LINGERING INFLUENCE OF WIDESPREAD CONVECTION PRECLUDES
CONFIDENTLY DETERMINING THE SEVERE POTENTIAL THROUGH THE REMAINDER
OF THE PERIOD.

..KERR.. 04/23/2009

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KICT [230803]: Preliminary Local Storm Report...corrected

NWUS53 KICT 230803
LSRICT

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE WICHITA KS
303 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0151 AM TSTM WND GST 6 NNE EL DORADO LAKE 37.94N 96.75W
04/23/2009 E60.00 MPH BUTLER KS LAW ENFORCEMENT

50 TO 60 MPH WINDS AND PEA SIZED HAIL ALONG THE KANSAS
TURNPIKE AT MILE MARKER 85. FROM KTA.

&&

$$

BDK

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 230737
SWODY3
SPC AC 230734

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0234 AM CDT THU APR 23 2009

VALID 251200Z - 261200Z

...THERE IS A SLGT RISK OF SVR TSTMS SAT/SAT NIGHT FROM PARTS OF THE
S CNTRL PLAINS INTO UPPER PORTIONS OF THE MIDDLE MISSISSIPPI
VALLEY....

...SYNOPSIS...
SHORT WAVE DEVELOPMENTS WITHIN THE PREVAILING SPLIT UPPER FLOW
REGIME REMAIN A SOURCE OF CONSIDERABLE SPREAD AND DISCREPANCIES
AMONG MODEL DATA FOR THIS FORECAST PERIOD AND BEYOND. HOWEVER...
GUIDANCE IS IN REASONABLE AGREEMENT CONCERNING THE GENERAL PATTERN
EVOLUTION. LARGE-SCALE TROUGHING LIKELY WILL ENCOMPASS MUCH OF
CANADA AND THE WESTERN/NORTH CENTRAL U.S. BY LATE SATURDAY
NIGHT...WHILE UPPER RIDGING PERSISTS ACROSS THE GULF COAST AND
EASTERN STATES. WITHIN THE NORTHERN BRANCH OF SPLIT FLOW EMANATING
FROM THE NORTHEAST PACIFIC/NORTHWESTERN NORTH AMERICA...A VIGOROUS
SHORT WAVE TROUGH IS PROGGED TO RAPIDLY LIFT NORTHEAST OF THE UPPER
GREAT LAKES REGION DURING THE DAY SATURDAY...WHILE AN UPSTREAM
IMPULSE DIGS SOUTH OF THE CANADIAN ROCKIES. THIS LATTER FEATURE
APPEARS LIKELY TO CONTRIBUTE TO THE NORTHEASTWARD ACCELERATION OF
ANOTHER STRONG SHORT WAVE IMPULSE OUT OF THE BASE OF THE SOUTHERN
BRANCH TROUGH OVER THE FOUR CORNERS REGION. JUST HOW FAST THIS WILL
OCCUR IS UNCERTAIN...BUT THIS SYSTEM IS EXPECTED TO HAVE ENOUGH OF
AN IMPACT ACROSS THE SOUTH CENTRAL PLAINS INTO PARTS OF THE MIDDLE
MISSISSIPPI VALLEY TO SUPPORT CONSIDERABLE SEVERE POTENTIAL.

...SOUTHERN PLAINS INTO THE GREAT LAKES REGION...
STEEP MID-LEVEL LAPSE RATES ARE EXPECTED TO PERSIST DOWNSTREAM OF
THE UPPER TROUGH ACROSS MUCH OF THE CENTRAL/SOUTHERN PLAINS THROUGH
UPPER PORTIONS OF THE MIDDLE MISSISSIPPI VALLEY INTO SATURDAY. IN
THE WAKE OF THE DEPARTING NORTHERN BRANCH IMPULSE...WITH
CONSIDERABLE CONVECTIVE DEVELOPMENT PERHAPS ONGOING EARLY IN THE
DAY...THIS IS MORE UNCERTAIN EAST NORTHEASTWARD INTO THE GREAT LAKES
REGION. BUT...GULF RETURN FLOW...AROUND A LARGE LOW-LEVEL RIDGE
CENTERED OVER THE SOUTHEAST...COULD BE SUFFICIENT IN THE PRESENCE OF
FAVORABLE DEEP LAYER SHEAR ON THE SOUTHERN FRINGE OF THE
WESTERLIES...TO SUPPORT A CONTINUATION OF STRONG/SEVERE STORMS
THROUGH THE DAY.

MORE PROBABLE...A PRE-FRONTAL LOW-LEVEL CONFLUENCE ZONE WILL BECOME
THE FOCUS FOR INTENSE CONVECTIVE DEVELOPMENT AS INHIBITION WEAKENS
BY/SHORTLY AFTER PEAK HEATING...FROM PARTS OF EASTERN/ SOUTHERN IOWA
THROUGH EASTERN KANSAS. MIXED LAYER CAPE UP TO 2000 J/KG WILL
SUPPORT VIGOROUS UPDRAFTS IN THE PRESENCE OF A FAVORABLY SHEARED
SOUTHWESTERLY DEEP LAYER MEAN FLOW ON THE ORDER OF 40 KTS...WHICH
WILL SUPPORT THE RISK FOR SEVERE STORMS CAPABLE MAINLY OF PRODUCING
LARGER HAIL AND DAMAGING WINDS.

THE LIKELIHOOD OF A COLD FRONTAL PASSAGE THROUGH MUCH OF WESTERN/
CENTRAL KANSAS ADDS UNCERTAINTY TO THE FORECAST. BUT...THE DRY LINE
AND DRY LINE/COLD FRONTAL INTERSECTION ACROSS THE TEXAS/ OKLAHOMA
PANHANDLE AREA INTO THE VICINITY OF THE WESTERN OKLAHOMA/KANSAS
BORDER SHOULD PROVIDE THE FOCUS FOR ADDITIONAL DISCRETE STORM
DEVELOPMENT. IN THE PRESENCE OF MODERATE TO STRONG SHEAR AND
INSTABILITY...A FEW SUPERCELLS ARE LIKELY...CAPABLE OF PRODUCING
LARGE HAIL/DAMAGING WINDS...PERHAPS A FEW TORNADOES. THIS ACTIVITY
IS EXPECTED TO PERSIST INTO THE EVENING HOURS...BEFORE PRIMARY
DEVELOPMENT SHIFTS TO THE STRENGTHENING WARM ADVECTION REGIME ABOVE
THE SURFACE FRONT ACROSS KANSAS...WHERE THE RISK FOR AT LEAST LARGE
HAIL MAY PERSIST THROUGH THE NIGHT.

...CENTRAL APPALACHIANS...
MODELS SUGGEST MOISTENING/DESTABILIZATION BENEATH UPPER RIDGE WILL
BE SUPPORTIVE OF SCATTERED STORM DEVELOPMENT TO THE LEE OF THE
CENTRAL APPALACHIANS. STEEP ENOUGH LAPSE RATES WILL EXIST TO
SUPPORT LOW PROBABILITIES FOR HAIL/GUSTY WINDS...DESPITE VERY WEAK
SHEAR.

..KERR.. 04/23/2009

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MESO: Mesoscale Discussion 0545

ACUS11 KWNS 230733
SWOMCD
SPC MCD 230732
MOZ000-OKZ000-KSZ000-230900-

MESOSCALE DISCUSSION 0545
NWS STORM PREDICTION CENTER NORMAN OK
0232 AM CDT THU APR 23 2009

AREAS AFFECTED...SERN KS/SWRN MO/NERN OK

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 230732Z - 230900Z

SMALL BUT WELL-ORGANIZED CLUSTER OF ELEVATED STORMS WILL CONTINUE TO
BE ACCOMPANIED BY A THREAT FOR HAIL AND/OR LOCALLY-DAMAGING GUSTS.

A CLUSTER OF STRONG/SEVERE STORMS CONTINUES MOVING ACROSS
LYON/GREENWOOD COUNTIES IN SERN KS...AIDED BY AN INTENSIFYING SSWLY
LOW-LEVEL JET /NOW INTO THE 70 KT RANGE AT 1 KM PER CENTRAL OK
VWP/PROFILERS/. EVENING RAOBS REVEALED A DEEP/DRY BOUNDARY
LAYER...THOUGH SOME ADVECTION OF MODEST MOISTURE ALOFT HAS
APPARENTLY YIELDED A SATURATED LAYER -- SOMEWHERE BETWEEN 800 AND
600 MB -- SUPPORTING THE OBSERVED CONVECTIVE DEVELOPMENT.

CONTINUED THETA-E ADVECTION/ASCENT SUPPLIED BY THE STRONG LOW-LEVEL
JET SHOULD CONTINUE TO SUPPORT THUNDERSTORMS...WHICH SHOULD MOVE EWD
-- AND THEN EVENTUALLY ESEWD -- ACROSS SERN KS. HAIL -- AND PERHAPS
A DAMAGING GUST RESULTING FROM A STRONG EVAPORATIVELY-COOLED
DOWNDRAFT REACHING THE GROUND DESPITE THE STABLE NEAR-SURFACE LAYER
-- WILL REMAIN POSSIBLE. HOWEVER...WITH THE THREAT LIKELY TO REMAIN
LIMITED...WW IS NOT ANTICIPATED ATTM.

..GOSS.. 04/23/2009

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...SGF...EAX...TSA...TOP...ICT...

LAT...LON 37349705 38099751 38299671 38339509 37999418 37009376
36619424 36739559 37349705

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KICT [230710]: Preliminary Local Storm Report

NWUS53 KICT 230710
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
210 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0151 AM TSTM WND GST 4 NNE EL DORADO LAKE 37.91N 96.76W
04/23/2009 E60.00 MPH BUTLER KS LAW ENFORCEMENT

50 TO 60 MPH WINDS AND PEA SIZED HAIL ALONG THE KANSAS
TURNPIKE AT MILE MARKER 85. FROM KTA.

&&

$$

BDK

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KICT [230646]: Preliminary Local Storm Report

NWUS53 KICT 230646
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
146 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0138 AM TSTM WND GST BURNS 38.09N 96.89W
04/23/2009 E50 MPH MARION KS TRAINED SPOTTER

&&

$$

JMC

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KTOP [230632]: Preliminary Local Storm Report

NWUS53 KTOP 230632
LSRTOP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
132 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0128 AM TSTM WND GST 4 SSE OLPE 38.22N 96.14W
04/23/2009 E50 MPH LYON KS TRAINED SPOTTER

SPOTTER ESTIMATED WIND SPEEDS AROUND 50MPH. SMALL
BRANCHES UP TO 3/4 INCH DIAMETER BEING BLOWN DOWN.

&&

$$

EK

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KICT [230630]: Preliminary Local Storm Report

NWUS53 KICT 230630
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
130 AM CDT THU APR 23 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0121 AM HAIL ROSE HILL 37.57N 97.13W
04/23/2009 E0.75 INCH BUTLER KS COUNTY OFFICIAL

&&

$$

JMC

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 230553
SWODY1
SPC AC 230551

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1251 AM CDT THU APR 23 2009

VALID 231200Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
HEIGHTS ALOFT ARE FCST TO RISE OVER MOST OF ERN CONUS IN WAKE OF
DEPARTING/DEAMPLIFYING NERN TROUGH...AND FALL ACROSS LARGE PART OF
GREAT BASIN AND INTER-MOUNTAIN W REGION. SRN LOBE OF
POSITIVELY-TILTED/HIGH-AMPLITUDE SHORTWAVE TROUGH WILL DIG SEWD
ACROSS NV BY END OF PERIOD...WITH REMAINDER OF TROUGH EXTENDING NEWD
OVER NRN HIGH PLAINS.

RELATED SFC COLD FRONT -- ALSO ALIGNED SW-NE -- WILL SAG SEWD ACROSS
NRN HIGH PLAINS AND MUCH OF DAKOTAS BY 24/12Z. WEAK SFC
CYCLOGENESIS IS POSSIBLE ALONG THIS FRONT...OVER WRN/CENTRAL SD
DURING AFTERNOON...WITH LOW SHIFTING/RE-DEVELOPING EWD OVER MN
OVERNIGHT. LEE TROUGHING WILL EXTEND FROM WRN SD SWD ACROSS TX
PANHANDLE AND BIG BEND REGION BY 24/00Z. WARM FRONT SHOULD MOVE
SLOWLY NWD ACROSS CENTRAL PLAINS...OZARKS...TN VALLEY REGION AND GA
DURING PERIOD.

...UPPER MIDWEST...
WIDELY SCATTERED TO SCATTERED TSTMS SHOULD DEVELOP ACROSS THIS
REGION DURING AFTERNOON/EVENING HOURS...A FEW OF WHICH MAY PRODUCE
HAIL AND STG-SVR GUSTS. FCST SOUNDINGS SUGGEST STG SFC HEATING MAY
WEAKEN CAP SUFFICIENTLY - IN COMBINATION WITH FRONTAL LIFT -- TO
SUPPORT POTENTIAL FOR SFC-BASED TSTM DEVELOPMENT DURING LATE
AFTERNOON AND EARLY EVENING. 45-55 DEG F SFC DEW POINTS WILL BE
MRGL...BUT SHOULD SUPPORT MLCAPE APCHG 1000 J/KG BENEATH 8.5-9 DEG
C/KM LOW-MIDLEVEL LAPSE RATES. SRN BELT OF STRONGEST MID-UPPER FLOW
-- E.G. 40-50 KT AT 500 MB -- WILL HELP TO ENHANCE DEEP-LAYER SHEAR
IN SUPPORT OF POTENTIAL FOR SOME STORM ORGANIZATION. ACTIVITY MAY
PERSIST INTO LATE EVENING ALONG OR EVEN SLIGHTLY BEHIND SFC COLD
FRONT...WIND POTENTIAL DIMINISHING BUT WITH HAIL STILL POSSIBLE.

...SW TX...
CONDITIONAL SVR THREAT EXISTS FOR SMALL PART OF RIO GRANDE VALLEY
REGION THIS AFTERNOON -- JUST AHEAD OF SRN STREAM SHORTWAVE
TROUGH...AMD DOWNSHEAR FROM LIKELY OROGRAPHIC TSTM GENESIS REGION OF
SERRANIAS DEL BURRO RANGE IN COAHUILA. MODIFIED NAM/ETA-KF FCST
SOUNDINGS SUGGEST CAPPING WILL REMAIN ROBUST AROUND DRT...AT BASE OF
STG ELEVATED MIXED LAYER THAT WILL ADVECT EWD FROM HIGHER TERRAIN TO
W. HOWEVER...COMBINATION OF UPSLOPE/ELY BOUNDARY LAYER WIND
COMPONENT MOISTENING WITH TIME...AND STG HEATING OF THAT HIGHER MEX
TERRAIN...SHOULD RESULT IN ISOLATED TO WIDELY SCATTERED TSTMS
FORMING DURING MID-LATE AFTERNOON. SOME OF THIS ACTIVITY MAY REACH
BORDERLANDS BEFORE DISSIPATING. FCST STORM MOTIONS ONLY 10-15 KT
ARE BASED ON SUPERCELL MOTION ALGORITHMS...HOWEVER
OUTFLOW-AIDED/DRIVEN STORMS MAY FORWARD-PROPAGATE FASTER. STG
VEERING WITH HEIGHT AND 35-45 KT EFFECTIVE SHEAR INDICATES SOME
SUPERCELL AND/OR BOW POTENTIAL DESPITE PRONOUNCED WEAKNESSES IN
LOWER MIDLEVEL FLOW -- I.E. AROUND 700 MB.

STG-SVR HAIL AND GUSTS ALSO MAY ACCOMPANY ANY TSTMS INITIATING INVOF
DIFFUSE DRYLINE N OF NRN BEND OF RIO GRANDE. ALTHOUGH LACK OF MORE
ROBUST MOISTURE WILL LIMIT COVERAGE/DURATION OF ANY SUCH
CONVECTION...HOT/WELL-MIXED BOUNDARY LAYER AND RELATED POTENTIAL FOR
SUBCLOUD EVAPORATIONAL COOLING MAY SUPPORT SURVIVAL OF
HAIL/DOWNBURSTS TO SFC FOR A 2-3 HOUR WINDOW DURING LATE AFTERNOON.

...PORTIONS TN VALLEY TO SRN PIEDMONT REGION...
CONDITIONAL AND MRGL SVR POTENTIAL EXISTS OVER THIS
REGION...PRIMARILY DURING AFTERNOON. STG SFC HEATING...AT LEAST
MRGL MOISTURE AND SUBTLE ASCENT INVOF SFC FRONTAL ZONE WILL
CONTRIBUTE TO POTENTIAL FOR CAP TO BREAK...WITH STG-SVR
MULTICELLULAR/CLUSTERED MODES POSSIBLE. IN ADDITION TO WARM
FRONT...SMALLER/MESOBETA SCALE BOUNDARIES MAY ACT AS MORE SPECIFIC
FOCI...INCLUDING OUTFLOWS AND/OR DIFFERENTIAL HEATING/MOISTENING
ZONES RELATED TO PRIOR/OVERNIGHT ACTIVITY NOW UNDERWAY. ALTHOUGH
WINDS WILL VEER WITH HEIGHT...ESPECIALLY WITHIN WARM FRONTAL
ZONE...WEAK MID-UPPER WINDS WILL MINIMIZE DEEP-LAYER SHEAR.
HOWEVER...ERN TONGUE OF ELEVATED MIXED LAYER AIR WILL PROVIDE STEEP
MIDLEVEL LAPSE RATES...COMBINING WITH SFC DEW POINTS MID 50S TO LOW
60S F TO CONTRIBUTING TO MLCAPE 1500-2000 J/KG...ATOP WELL-MIXED
SUBCLOUD LAYER.

..EDWARDS.. 04/23/2009

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 230546
SWODY2
SPC AC 230543

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1243 AM CDT THU APR 23 2009

VALID 241200Z - 251200Z

...THERE IS A SLGT RISK OF SVR TSTMS FRI AFTN/FRI NIGHT ACROSS PARTS
OF THE MID MISSOURI AND UPPER MISSISSIPPI VALLEYS....

...SYNOPSIS...
MODEL GUIDANCE APPEARS TO BE COMING INTO BETTER AGREEMENT CONCERNING
SOME OF THE SMALLER SCALE DEVELOPMENTS WITHIN THE PREVAILING SPLIT
UPPER FLOW PATTERN THROUGH AT LEAST THIS FORECAST PERIOD. IN
GENERAL...AN UPPER TROUGH IS PROGGED TO CONTINUE EVOLVING ACROSS
MUCH OF THE WESTERN STATES...AS A VIGOROUS SHORT WAVE
TROUGH...EMBEDDED WITHIN THE SOUTHERN BRANCH OF SPLIT BELTS
EMANATING FROM THE NORTHEAST PACIFIC...DIGS INTO THE INTERMOUNTAIN
WEST. AT THE SAME TIME...A VIGOROUS NORTHERN BRANCH IMPULSE IS
PROGGED TO TURN EAST OF THE CANADIAN ROCKIES...BEFORE LIFTING
THROUGH THE CENTRAL CANADIAN PROVINCES...WHILE ANOTHER
IMPULSE...EMBEDDED WITHIN A STREAM EMANATING FROM THE CENTRAL
PACIFIC...MIGRATES ACROSS THE SOUTH CENTRAL STATES. RIDGING IN THE
WAKE OF THIS LATTER FEATURE AT UPPER LEVELS APPEARS LIKELY TO BUILD
NORTHEAST OF THE SOUTHERN ROCKIES THROUGH THE CENTRAL/SOUTHERN
PLAINS. DOWNSTREAM... MID-LEVEL RIDGING IS EXPECTED TO CONTINUE
BUILDING EAST OF THE MISSISSIPPI VALLEY THROUGH THE ATLANTIC
SEABOARD.

THIS EVOLVING PATTERN WILL MAINTAIN THE NORTHEASTWARD ADVECTION OF
ELEVATED MIXED LAYER AIR OUT OF THE SOUTHERN U.S./NORTHERN MEXICAN
PLATEAU AND SOUTHERN ROCKIES REGION...AS AN INCREASINGLY MOIST
RETURN FLOW DEVELOPS INTO THE PLAINS...OFF THE WESTERN GULF OF
MEXICO. MEANWHILE...A SIGNIFICANT COLD FRONT ASSOCIATED WITH THE
POLAR TROUGHS WILL ADVANCE THROUGH THE GREAT BASIN...AND TO THE LEE
OF THE ROCKIES...MORE RAPIDLY ACROSS THE NORTHERN HIGH PLAINS...THAN
THE UPPER MISSISSIPPI VALLEY.

...MID MO VALLEY INTO THE UPPER MISSISSIPPI VALLEY...
MODELS INDICATE THAT VERY STEEP MID-LEVEL LAPSE RATES /AROUND 8-9
DEG C/ WILL OVERSPREAD MOST OF THE REGION BY EARLY FRIDAY. THIS
...COUPLED WITH PRE-FRONTAL MOISTURE ALREADY EXPECTED TO BE IN
PLACE...APPEARS LIKELY TO BE SUPPORTIVE OF MODERATELY STRONG
DESTABILIZATION. FURTHER MOISTENING WITH AN INITIAL SURGE OFF THE
GULF OF MEXICO IS PROGGED TO OVERSPREAD THE MID MISSOURI VALLEY BY
LATE FRIDAY AFTERNOON. A NARROW PRE-FRONTAL THERMAL RIDGE AXIS
EMANATING FROM THE CENTRAL HIGH PLAINS SHOULD BE THE FOCUS FOR
STRONGEST DESTABILIZATION...WITH MIXED LAYER CAPE EXPECTED TO EXCEED
2000 J/KG BY PEAK HEATING.

GUIDANCE IS SUGGESTIVE THAT BOUNDARY LAYER BASED STORMS WILL
INITIATE FIRST...DURING THE LATE AFTERNOON...ACROSS PARTS OF WEST
CENTRAL/NORTH CENTRAL WISCONSIN...NEAR A WEAK FRONTAL WAVE...WHERE
CAPPING MAY BE RELATIVELY WEAKER. LOW-LEVEL HODOGRAPHS WILL BE
CLOCKWISE CURVED...AND SOMEWHAT SIZABLE... BENEATH 30+ KT
SOUTHWESTERLY 850 MB FLOW ACROSS THIS REGION. AND...THIS WILL
CONTRIBUTE TO A RISK FOR ISOLATED TORNADOES IN DEVELOPING
SUPERCELLS...DESPITE A SOMEWHAT RELATIVELY MODEST STRENGTH TO THE
SOUTHWESTERLY MID/UPPER FLOW. LARGE HAIL/DAMAGING WIND GUSTS MAY BE
THE PRIMARY SEVERE THREATS...WITH A CONSOLIDATION INTO A GROWING
STORM CLUSTER POSSIBLE DURING THE EARLY EVENING...AIDED BY A
DIVERGENT UPPER FLOW FIELD IN THE ENTRANCE REGION OF A NORTHERN
STREAM JET STREAK.

ALTHOUGH GREATER INHIBITION MAY RESULT IN SLOWER CONVECTIVE
DEVELOPMENT AHEAD OF THE FRONT ACROSS THE MIDDLE MISSOURI VALLEY...A
MOISTURE SURGE WITH SURFACE DEW POINTS INCREASING INTO THE LOWER/MID
60S MAY CONTRIBUTE TO A WEAKENING CAP BY OR SHORTLY AFTER 25/00Z.
LOW-LEVEL WARM ADVECTION BENEATH DIFLUENT UPPER FLOW SOUTH OF THE
STRONGER WESTERLIES...ON THE NORTHEASTERN PERIPHERY OF THE UPPER
RIDGE...IS EXPECTED TO SUPPORT STORM INITIATION. A FEW SUPERCELLS
ARE POSSIBLE...INCLUDING THE RISK FOR ISOLATED
TORNADOES...PARTICULARLY DURING THE EARLY EVENING ON THE NOSE OF A
CENTRAL PLAINS LOW-LEVEL JET STRENGTHENING IN EXCESS OF 50 KTS.
HOWEVER...GIVEN THE ANTICIPATED SIZABLE TEMPERATURE/DEW POINT
SPREADS WITHIN THE LOWER/MID TROPOSPHERE... IN THE PRESENCE OF VERY
STEEP LAPSE RATES AND LARGE CAPE...HAIL/ WIND POTENTIAL APPEARS MORE
PROMINENT...SOME OF WHICH MIGHT BECOME PARTICULARLY LARGE/STRONG.

DESPITE THE LACK OF MORE SIGNIFICANT MID/UPPER FORCING...IT STILL
APPEARS POSSIBLE THAT FORCING/SHEAR ASSOCIATED WITH THE
STRENGTHENING LOW-LEVEL JET MAY SUPPORT UPSCALE GROWTH OF STORMS
INTO A FAIRLY LARGE MESOSCALE CONVECTIVE SYSTEM DURING EVENING
ACROSS SOUTHERN/EASTERN NEBRASKA INTO WESTERN IOWA. IF THIS
OCCURS...HIGH SURFACE WIND GUST POTENTIAL WILL INCREASE...AND COULD
SPREAD TOWARD THE UPPER MISSISSIPPI VALLEY LATE FRIDAY NIGHT.

..KERR.. 04/23/2009

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KPIH [230543]: Preliminary Local Storm Report

NWUS55 KPIH 230543
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
1142 PM MDT WED APR 22 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1100 PM TSTM WND GST 1 S MICHAUD 42.92N 112.57W
04/22/2009 M53 MPH POWER ID ASOS

MEASURED BY ASOS AT POCATELLO REGIONAL AIRPORT

&&

$$

JKEYES

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KICT [230431]: Preliminary Local Storm Report

NWUS53 KICT 230431
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
1131 PM CDT WED APR 22 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1130 PM HAIL VALLEY CENTER 37.84N 97.37W
04/22/2009 E0.88 INCH SEDGWICK KS NWS EMPLOYEE

&&

$$

ADK

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