KREV [200341]: Preliminary Local Storm Report

NWUS55 KREV 200341
LSRREV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
841 PM PDT SAT APR 19 2008

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

0941 AM NON-TSTM WND GST 5 WSW GARDNERVILLE 38.91N 119.83W
04/19/2008 M51.00 MPH DOUGLAS NV TRAINED SPOTTER

WIND GUST 51 MPH FROM THE SSW.

0330 PM NON-TSTM WND GST 3 W LOYALTON 39.68N 120.31W
04/19/2008 M64.00 MPH SIERRA CA TRAINED SPOTTER

WINDS GENERALLY AROUND 30 MPH.

&&

$$

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KTFX [200340]: Preliminary Local Storm Report

NWUS55 KTFX 200340
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
940 PM MDT SAT APR 19 2008

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

0915 PM SNOW WHITEHALL 45.87N 112.10W
04/19/2008 E5.0 INCH JEFFERSON MT TRAINED SPOTTER

A TOTAL OF 4 TO 5 INCHES OF SNOW REPORTED THROUGH 915 PM
MDT...WITH LIGHT SNOW CONTINUING.

&&

$$

ACOHEN

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KTFX [200314]: Preliminary Local Storm Report

NWUS55 KTFX 200314
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
911 PM MDT SAT APR 19 2008

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

0600 PM SNOW 5 WSW GREAT FALLS 47.47N 111.38W
04/19/2008 M3.2 INCH CASCADE MT OFFICIAL NWS OBS

A TOTAL OF 3 INCHES OF SNOW MEASURED AT THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS THROUGH
600 PM MDT TODAY.

0718 PM SNOW 9 NE BABB 48.95N 113.30W
04/19/2008 U0.0 INCH GLACIER MT TRAINED SPOTTER

SNOW WITH VISIBILITIES OF ONE HALF TO THREE QUARTERS MILE
AND TWO-FOOT DRIFTS REPORTED AT PORT OF PIEGAN. SNOWING
SINCE APPROXIMATELY 400 PM MDT.

0830 PM HEAVY SNOW SHELBY 48.51N 111.86W
04/19/2008 E6.0 INCH TOOLE MT LAW ENFORCEMENT

SUSTAINED WEST-NORTHWEST WINDS AROUND 30 MPH WITH
VISIBILITIES UNDER ONE QUARTER MILE AND SNOW DRIFTS FROM
8 INCHES TO 1 FOOT. SNOWING SINCE APPROXIMATELY 600 PM
MDT.

0830 PM SNOW CONRAD 48.17N 111.95W
04/19/2008 E4.0 INCH PONDERA MT LAW ENFORCEMENT

SUSTAINED NORTHWEST WINDS OF 30 TO 40 MPH WITH
VISIBILITIES OF A FEW HUNDRED FEET. SNOWING SINCE
APPROXIMATELY 500 PM MDT.

0830 PM SNOW CHOTEAU 47.81N 112.18W
04/19/2008 E4.0 INCH TETON MT LAW ENFORCEMENT

SUSTAINED NORTHWEST WINDS OF 15 TO 30 MPH WITH
VISIBILITIES UNDER ONE QUARTER MILE. WORST CONDITIONS
BETWEEN 400 PM AND 600 PM MDT.

&&

SNOW AND WINDY CONDITIONS HAVE OCCURRED ACROSS CENTRAL AND NORTH
CENTRAL MONTANA TODAY. ABOVE IS A LISTING OF SOME SELECTED REPORTS
RECEIVED SO FAR.

$$

ACOHEN

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KEKA [200258]: Preliminary Local Storm Report

NWUS56 KEKA 200258
LSREKA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
758 PM PDT SAT APR 19 2008

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

1150 AM HAIL 4 W ETTERSBURG 40.12N 124.07W
04/19/2008 E0.25 INCH HUMBOLDT CA TRAINED SPOTTER

ELEVATION 1700 FEET. VERY LIGHT AND BRIEF HAIL SHOWER
WITH NO RAIN. TEMPERATURE 41.7 DEGREES

0215 PM NON-TSTM WND GST 10 N JUNCTION CITY 40.87N 123.05W
04/19/2008 E40 MPH TRINITY CA TRAINED SPOTTER

IN GRASSHOPPER FLAT AROUND CANYON CREEK. VERY GUSTY WINDS
AT 2900 FEET.

0215 PM HAIL REDWOOD VLY 39.27N 123.20W
04/19/2008 E0.25 INCH MENDOCINO CA PUBLIC

JUST OFF HWY 299 NOT TOO FAR FROM BARRY SUMMIT. REPORTING
ELEVATION AT 1400 FEET.

0320 PM HAIL GASQUET 41.85N 123.97W
04/19/2008 E0.25 INCH DEL NORTE CA PUBLIC

SMALL HAIL NOT ACCUMULATING

0359 PM SNOW 1 S DEL LOMA 40.77N 123.33W
04/19/2008 U0.0 INCH TRINITY CA TRAINED SPOTTER

AT 1000 FEET, LIGHT SNOW. TEMPERATURE 36 DEGREES

0500 PM SNOW 10 N JUNCTION CITY 40.87N 123.05W
04/19/2008 U0.0 INCH TRINITY CA TRAINED SPOTTER

SPOTTER IN GRASSHOPPER FLATS. REPORT OF FLURRIES ONTOP OF
MONUMENT PEAK. TEMPERATURE FALLING RAPIDLY.

0600 PM HAIL 8 S MAPLE CREEK 40.65N 123.90W
04/19/2008 E0.25 INCH HUMBOLDT CA TRAINED SPOTTER

NEAR KNEELAND AT 2500 FEET. SLEET/HAIL SHOWERS.

0700 PM SNOW 4 W ETTERSBURG 40.12N 124.07W
04/19/2008 U0.0 INCH HUMBOLDT CA TRAINED SPOTTER

1700 FEET. TEMPERATURE 35.4 DEGREES.

0708 PM SNOW FOREST GLEN 40.38N 123.32W
04/19/2008 U0.0 INCH TRINITY CA TRAINED SPOTTER

AROUND 4000 FEET, SNOWING OFF/ON ALL DAY BUT IS NOW

STICKING. TEMPERATURE 32.9 DGREES. PRESSURE 29.83 INCHES.

0720 PM SNOW HONEYDEW 40.23N 124.12W
04/19/2008 U0.0 INCH HUMBOLDT CA PUBLIC

BETWEEN PETROLIA AND HONEYDEW OFF WILDER RIDGE
ROAD.ELEVATION 1500 FEET. 1 MILE EAST OF OCEAN AND NORTH
OF KINGS RANGE.

0725 PM SNOW BRICELAND 40.10N 123.90W
04/19/2008 U0.0 INCH HUMBOLDT CA TRAINED SPOTTER

ELKS RIDGE. LIGHT SNOW MELTING ON CONTACT. SNOW AT
SLIGHTLY HIGHER ELEVATION THEN HIS ELEVATION WHICH IS 850
FEET. TEMPERATURE 40 DEGREES.

0730 PM SLEET 10 N LAYTONVILLE 39.81N 123.48W
04/19/2008 E0.00 INCH MENDOCINO CA TRAINED SPOTTER

NE SIDE OF IRON PEAK AT 3800 FEET. SOME LIGHT SNOW MIXED.

&&

$$

ASHFORD

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KMFR [200247]: Preliminary Local Storm Report

NWUS56 KMFR 200247
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
747 PM PDT SAT APR 19 2008

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

0609 PM SNOW 5 SE RUCH 42.18N 122.98W
04/19/2008 M1.5 INCH JACKSON OR TRAINED SPOTTER

1.5 INCHES OF SNOW...BUT DRIVEWAY IS CLEAR. TEMPERATURE
IS 32 DEGREES. ELEVATION 2000 FEET.

&&

$$

STOCKTON

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KRNK [200239]: Preliminary Local Storm Report

NWUS51 KRNK 200239
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1038 PM EDT SAT APR 19 2008

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

0956 PM TSTM WND DMG 2 SW BLACKSBURG 37.21N 80.44W
04/19/2008 MONTGOMERY VA LAW ENFORCEMENT

OUTBUILDING AND PULL ALONG TRAILER MOVED. DOG KENNEL
DESTROYED ON HIGH TOP ROAD.

&&

$$

JJACKSON

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KGSP [200222]: Preliminary Local Storm Report

NWUS52 KGSP 200222
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1022 PM EDT SAT APR 19 2008

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

1015 PM HAIL MOCKSVILLE 35.90N 80.56W
04/19/2008 E0.75 INCH DAVIE NC LAW ENFORCEMENT

&&

$$

NED

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KGSP [200218]: Preliminary Local Storm Report

NWUS52 KGSP 200218
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1018 PM EDT SAT APR 19 2008

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

1000 PM HAIL WOODLEAF 35.77N 80.59W
04/19/2008 E0.75 INCH ROWAN NC COUNTY OFFICIAL

&&

$$

NED

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KRNK [200206]: Preliminary Local Storm Report

NWUS51 KRNK 200206
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1006 PM EDT SAT APR 19 2008

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

0916 PM TSTM WND DMG 5 S MOUNT AIRY 36.43N 80.61W
04/19/2008 SURRY NC LAW ENFORCEMENT

TREES DOWN AND UTILITY BUILDINGS BLOWN INTO THE ROAD. ON
LOCUST GROVE LANE OFF SILOAM ROAD.

&&

$$

JJACKSON

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KGSP [200151]: Preliminary Local Storm Report

NWUS52 KGSP 200151
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
951 PM EDT SAT APR 19 2008

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

0944 PM HAIL 4 E STATESVILLE 35.79N 80.81W
04/19/2008 E0.88 INCH IREDELL NC TRAINED SPOTTER

SPOTTER REPORTED NICKEL SIZED HAIL IN THE TOWN OF
ELMWOOD.

&&

$$

JPT

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KVEF [200147]: Preliminary Local Storm Report

NWUS55 KVEF 200147
LSRVEF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
647 PM PDT SAT APR 19 2008

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

0330 PM NON-TSTM WND GST 12 SW ELGIN 37.25N 114.71W
04/19/2008 M46 MPH LINCOLN NV MESONET

MEASURED AT THE KANE SPRINGS MESOWEST SITE. ELEVATION
4382 FEET.

&&

$$

KLABELLE

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KGSP [200137]: Preliminary Local Storm Report

NWUS52 KGSP 200137
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
936 PM EDT SAT APR 19 2008

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

0924 PM HAIL 6 NE LINCOLNTON 35.54N 81.17W
04/19/2008 E0.75 INCH LINCOLN NC TRAINED SPOTTER

PENNY SIZED HAIL REPORTED SPOTTER WAS ON HWY 150 AT THE
TIME OF THE REPORT.

&&

$$

JPT

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KMFR [200136]: Preliminary Local Storm Report

NWUS56 KMFR 200136
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
635 PM PDT SAT APR 19 2008

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

0609 PM SNOW ASHLAND 42.19N 122.70W
04/19/2008 M0.5 INCH JACKSON OR NWS EMPLOYEE

0.5 INCHES ON THE GROUND, MOST OF IT IN THE PAST 30
MINUTES. LETTING UP NOW.

&&

$$

STOCKTON

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KVEF [200134]: Preliminary Local Storm Report

NWUS55 KVEF 200134
LSRVEF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
634 PM PDT SAT APR 19 2008

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

0330 PM NON-TSTM WND GST 23 N MERCURY 37.01N 116.07W
04/19/2008 M45 MPH NYE NV MESONET

MEASURED AT MESOWEST REBOUND MEDA STATION. ELEVATION 3990
FEET.

&&

$$

KLABELLE

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KGSP [200115]: Preliminary Local Storm Report

NWUS52 KGSP 200115
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
915 PM EDT SAT APR 19 2008

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

0820 PM TORNADO FALLSTON 35.43N 81.50W
04/19/2008 CLEVELAND NC COUNTY OFFICIAL

MULTIPLE TREES DOWN...A BARN PARTIAL COLLAPSED...SHINGLES
LIFTED OFF SEVERAL ROOFS. SEVERAL WITNESSES TO THE
TORNADO.

0845 PM TORNADO LINCOLNTON 35.48N 81.25W
04/19/2008 LINCOLN NC COUNTY OFFICIAL

REPORTS OF SEVERAL TREES AND POWER LINES DOWN. A FEW
HOMES DAMAGED. TIME ESTIMATED FROM RADAR.

&&

$$

NED

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KCAE [200115]: Preliminary Local Storm Report

NWUS52 KCAE 200115
LSRCAE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
914 PM EDT SAT APR 19 2008

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

0821 PM TSTM WND DMG 12 NW CAMDEN 34.38N 80.76W
04/19/2008 KERSHAW SC EMERGENCY MNGR

FIRE DEPARTMENT REPORTED TO EMERGENCY MANAGER THAT TREES
ARE DOWN ALONG HIGHWAY 5 NEAR THE FAIRFIELD COUNTY LINE.

&&

$$

AWP

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KJAN [192213]: Preliminary Local Storm Report

NWUS54 KJAN 192213
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
513 PM CDT SAT APR 19 2008

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

0642 PM TSTM WND DMG 6 NW FORESTDALE 32.84N 89.02W
04/18/2008 NESHOBA MS TRAINED SPOTTER

A FEW TREES DOWN IN NORTHEAST NESHOBA COUNTY NEAR BOND
AND SPRING CREEK.

&&

$$

HAMRICK

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KIWX [192209]: Preliminary Local Storm Report

NWUS53 KIWX 192209
LSRIWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
609 PM EDT SAT APR 19 2008

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

0607 PM HAIL 1 W QUINCY 41.94N 84.90W
04/19/2008 M0.40 INCH BRANCH MI TRAINED SPOTTER

&&

EVENT NUMBER 01301

$$

LASHLEY

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KRLX [192154]: Preliminary Local Storm Report

NWUS51 KRLX 192154
LSRRLX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
554 PM EDT SAT APR 19 2008

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

0535 PM HAIL 4 W BRADLEY 37.86N 81.27W
04/19/2008 E1.75 INCH RALEIGH WV PUBLIC

LAT 37.87 N LON 81.26W

&&

$$

RH

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KRLX [192148]: Preliminary Local Storm Report

NWUS51 KRLX 192148
LSRRLX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
548 PM EDT SAT APR 19 2008

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

0530 PM HAIL GLEN DANIEL 37.78N 81.34W
04/19/2008 E1.00 INCH RALEIGH WV PUBLIC

&&

$$

HATFIELD

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KJAN [192122]: Preliminary Local Storm Report

NWUS54 KJAN 192122
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
422 PM CDT SAT APR 19 2008

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

0518 PM TSTM WND DMG 6 NE THOMASTOWN 32.93N 89.60W
04/18/2008 LEAKE MS PUBLIC

SEVERAL TREES WERE BLOWN DOWN AROUND THE DOSSVILLE
COMMUNITY. POSSIBLE TORNADO.

0457 PM TSTM WND DMG 5 E CAMDEN 32.78N 89.75W
04/18/2008 MADISON MS PUBLIC

A COUPLE CHICKEN HOUSES WERE DAMAGED NEAR THE
MADISON/LEAKE COUNTY LINE. POSSIBLE TORNADO.

&&

$$

CME

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KJAN [192110]: Preliminary Local Storm Report...corrected

NWUS54 KJAN 192110
LSRJAN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSON MS
410 PM CDT SAT APR 19 2008

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

0604 PM TORNADO 3 SSW LOUISVILLE 33.08N 89.07W
04/18/2008 F1 WINSTON MS NWS STORM SURVEY

*** 1 INJ *** DAMAGE WAS OBSERVED ALONG A 10 MILE LONG
PATH FROM 3 SSW OF LOUISVILLE AT 604 PM...TO 6 NE OF
LOUISVILLE AT 620 PM...AND THE MAXIMUM WIDTH WAS 500
YARDS. SEVEN HOMES WERE BADLY DAMAGED...AND 25 PEOPLE
HAVE BEEN DISPLACED. A GEORGIA PACIFIC PAPER COMPANY
BUILDING WAS BADLY DAMAGED. THERE WAS ALSO SOME DAMAGE TO
THE ISLAND PLAZA APARTMENTS AND A SCHOOL BUS BARN. ONE
MINOR INJURY WAS REPORTED.

&&

$$

HAMRICK

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KJAN [192101]: Preliminary Local Storm Report

NWUS54 KJAN 192101
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
401 PM CDT SAT APR 19 2008

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

0542 PM TSTM WND DMG 5 ESE ZAMA 32.95N 89.30W
04/18/2008 WINSTON MS PUBLIC

SEVERAL TREES SNAPPED AND HIGHWAY SIGN BLOWN DOWN.
POSSIBLE TORNADO SPOTTED FROM PUBLIC WITNESS.

&&

$$

HAMRICK

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KVEF [192048]: Preliminary Local Storm Report

NWUS55 KVEF 192048
LSRVEF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
148 PM PDT SAT APR 19 2008

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

0100 PM NON-TSTM WND GST 3 SSW MERCURY 36.62N 116.02W
04/19/2008 M57 MPH NYE NV MESONET

MEASURED AT DESERT ROCK MESOWEST SITE A30. ELEVATION 3304
FEET.

&&

$$

KLABELLE

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KOTX [192023]: Preliminary Local Storm Report...corrected

NWUS56 KOTX 192023
LSROTX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPOKANE WA
123 PM PDT SAT APR 19 2008

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

0959 AM HEAVY SNOW 1 SSE EASTPORT 48.98N 116.17W
04/19/2008 M4.0 INCH BOUNDARY ID TRAINED SPOTTER

BOUNDARY 6 2800 FT OVERNIGHT TOTAL STILL SNOWING

0115 PM HEAVY SNOW 1 ENE MOYIE SPRINGS 48.73N 116.18W
04/19/2008 M7.0 INCH BOUNDARY ID TRAINED SPOTTER

BOUNDARY 16 2100 FT

&&

$$

RB

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KDVN [192021]: Preliminary Local Storm Report

NWUS53 KDVN 192021
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
320 PM CDT SAT APR 19 2008

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

0310 PM FUNNEL CLOUD DELMAR 42.00N 90.61W
04/19/2008 CLINTON IA PUBLIC

SEVERAL REPORTS HAVE BEEN RECEIVED OF A FUNNEL CLOUD NEAR
DELMAR.

0315 PM FUNNEL CLOUD 2 E WELTON 41.91N 90.56W
04/19/2008 CLINTON IA TRAINED SPOTTER

&&

$$

14

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KDVN [192011]: Preliminary Local Storm Report

NWUS53 KDVN 192011
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
310 PM CDT SAT APR 19 2008

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

0257 PM FUNNEL CLOUD 7 ENE PRINCETON 41.42N 89.34W
04/19/2008 BUREAU IL TRAINED SPOTTER

FUNNEL CLOUD WAS SPOTTED NEAR MILE MARKER 65 ON I80.
RELAYED BY NWS CHICAGO.

&&

$$

14

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 191937
SWODY1
SPC AC 191934

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0234 PM CDT SAT APR 19 2008

VALID 192000Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...CNTRL APPALACHIAN MTNS/CAROLINAS...
THE LATEST WATER VAPOR IMAGERY SHOWS AN UPPER-LEVEL LOW OVER THE OH
VALLEY ADVANCING SLOWLY EWD. AT THE SFC...A TROUGH IS LOCATED FROM
WV EXTENDING SSWWD ACROSS THE SRN APPALACHIAN MTNS. THUNDERSTORMS
WILL LIKELY INITIATE ALONG AND EAST OF THE SFC TROUGH AS LARGE-SCALE
ASCENT INCREASES FROM THE WEST. ALTHOUGH INSTABILITY REMAINS VERY
WEAK ACROSS THE REGION...SOME SFC HEATING HAS OCCURRED FROM CNTRL SC
NWD INTO CNTRL VA. LOW-LEVEL LAPSE RATES SHOULD BE MAXIMIZED ALONG
THIS CORRIDOR BY EARLY AFTERNOON AND A MARGINAL THREAT FOR WIND
DAMAGE MAY DEVELOP.

FURTHER NORTHWEST ACROSS ERN KY...WV AND WRN VA SCATTERED
THUNDERSTORMS WILL CONTINUE TO DEVELOP AHEAD OF THE APPROACHING
UPPER-LEVEL LOW. FORECAST SOUNDINGS ACROSS THE REGION SHOW COLD AIR
ALOFT AND STEEP MID-LEVEL LAPSE RATES ESPECIALLY ACROSS WV. THIS
SHOULD BE ENOUGH FOR A MARGINAL HAIL THREAT WITH THE STRONGER CELLS
THIS AFTERNOON.

..BROYLES.. 04/19/2008

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KSLC [191933]: Preliminary Local Storm Report

NWUS55 KSLC 191933
LSRSLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
130 PM MDT SAT APR 19 2008

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

1215 PM NON-TSTM WND GST 5 E OGDEN 41.20N 111.88W
04/19/2008 M64 MPH WEBER UT MESONET

OGDEN PEAK - 9570 FT

1200 PM NON-TSTM WND GST 7 SE OGDEN 41.19N 111.87W
04/19/2008 M61 MPH WEBER UT MESONET

SNOWBASIN STRAW TOP - 8999 FT

1000 PM NON-TSTM WND GST 2 WNW ALTA 40.59N 111.65W
04/18/2008 M59 MPH SALT LAKE UT MESONET

CARDIFF PEAK-10,059 FT

1245 PM NON-TSTM WND GST 2 NE VERNON 40.13N 112.38W
04/19/2008 M58 MPH TOOELE UT MESONET

VERNON HILL - 5761 FT

1200 PM NON-TSTM WND GST 2 S ALTA 40.57N 111.64W
04/19/2008 M58 MPH SALT LAKE UT MESONET

CENTRAL WASATCH PEAKS - 11000 FT

&&

$$

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MESO: Mesoscale Discussion 0667

ACUS11 KWNS 191901
SWOMCD
SPC MCD 191901
WVZ000-VAZ000-NCZ000-TNZ000-OHZ000-KYZ000-192100-

MESOSCALE DISCUSSION 0667
NWS STORM PREDICTION CENTER NORMAN OK
0201 PM CDT SAT APR 19 2008

AREAS AFFECTED...FAR ERN KY...SCNTRL OH...SWRN WV...SWRN
VA...EXTREME NWRN NC

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 191901Z - 192100Z

UPR LOW CONTINUES A SLOW EWD TREK INTO SWRN IND AT MID-AFTN. THERE
APPEARS TO BE A MODEST SPEED MAX MOVING QUICKLY TOWARD THE KY
COALFIELDS IN WATER VAPOR IMAGERY. THE ENHANCED ASCENT ASSOCD WITH
THIS FEATURE IN COMBINATION WITH MORE SIGNIFICANT COOLING ALOFT
BEGINNING TO SPREAD EWD WILL LIKELY MAKE FOR A MORE FAVORABLE
ENVIRONMENT FOR TSTMS THROUGH LATE AFTN.

EARLIER BANDS OF CONVECTION EFFECTIVELY MOISTENED THE BOUNDARY LAYER
WITH A NARROW ZONE OF LWR-MID 50S SFC DEW POINTS NOTED ALONG/AHEAD
OF A FRACTURED OCCLUDED FRONT. IN WAKE OF THE EARLY CONVECTION...A
BRIEF PERIOD OF INSOLATION HAS CONTRIBUTED TO WARMING SFC
TEMPERATURES WITH SBCAPES APPROACHING 500 J/KG ALONG THE APPALACHIAN
CREST NWWD INTO THE ERN KY COALFIELDS AND THE SWRN LOWLANDS OF WV.

TSTMS ARE EXPECTED TO DEVELOP VCNTY THE OCCLUDED FRONT FROM NERN
TN/NWRN NC NWWD INTO ERN KY AND SWRN WV THEN MOVE NWD TOWARD THE
MID-OH VLY WITH TIME. GIVEN COOLING TEMPERATURES ALOFT...ISOLD MORE
VIGOROUS STORMS MAY PRODUCE HAIL ALONG WITH GUSTY WINDS.

A WW IS NOT ANTICIPATED GIVEN THE MARGINAL INSTABILITY AND ISOLD
NATURE TO ANY SVR POTENTIAL.

..RACY.. 04/19/2008

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

ATTN...WFO...RNK...RLX...GSP...MRX...JKL...ILN...

36008309 37168308 37628301 37918307 38228311 38398307
38588287 38778254 38938228 38978187 38978170 38918127
38778085 38458064 38088062 37468055 36968061 36648069
36408082 36228106 36038159 35958198 35898227 35918266

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 191718
SWODY2
SPC AC 191716

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1216 PM CDT SAT APR 19 2008

VALID 201200Z - 211200Z

...NO SVR TSTM AREAS FORECAST...

...MID ATLANTIC...
A CLOSED-OFF UPPER-LEVEL LOW OVER THE OH VALLEY TONIGHT WILL MOVE
EWD INTO THE CNTRL APPALACHIAN MTNS SUNDAY. AT THE SFC...A TROUGH
AND COLD FRONT WILL MOVE EWD INTO VA AND THE CAROLINAS BY SUNDAY
AFTERNOON. ABUNDANT CLOUD COVER AND SCATTERED THUNDERSTORM ACTIVITY
SHOULD BE ONGOING AT THE BEGINNING OF THE PERIOD AND THIS SHOULD
HAMPER DESTABILIZATION ACROSS THE REGION. IN SPITE OF WEAK
INSTABILITY...SFC DEWPOINTS IN THE LOWER 60S F AND LIMITED SFC
HEATING SHOULD BE ENOUGH TO GRADUALLY INCREASE STORM INTENSITY BY
EARLY SUNDAY AFTERNOON. STRONG FORCING AND COLD AIR ALOFT ASSOCIATED
WITH THE UPPER-LEVEL LOW MAY SUPPORT A HAIL THREAT NEAR PEAK
HEATING. HOWEVER...FORECAST SOUNDINGS VALID AT 21Z ACROSS
MID-ATLANTIC SHOW LOW-END MODERATE VERTICAL SHEAR...0-6 KM SHEAR IN
THE 25 TO 35 KT RANGE. THIS WILL LIKELY KEEP THE THUNDERSTORM
ACTIVITY UNORGANIZED AND ANY SEVERE THREAT SHOULD REMAIN MARGINAL
ACROSS THE REGION.

...NRN PLAINS...
AN UPPER-LEVEL TROUGH OVER THE WEST COAST TONIGHT IS FORECAST TO
SWING ENEWD INTO THE NRN ROCKIES SUNDAY. THIS WILL INCREASE
LARGE-SCALE ASCENT EWD ACROSS THE NRN PLAINS DURING THE DAY 2
PERIOD. ALTHOUGH...FORECAST SOUNDINGS SHOW A STRONG CAPPING
INVERSION IN PLACE SUNDAY AFTERNOON...THE CAP SHOULD WEAKEN BY EARLY
EVENING AS LIFT INCREASES AND LOW-LEVEL CONVERGENCE BECOMES ENHANCED
NEAR A DEVELOPING SFC LOW. THIS SHOULD ALLOW SCATTERED THUNDERSTORMS
TO DEVELOP SUNDAY EVENING IN THE WRN DAKOTAS WITH THE ACTIVITY
SPREADING ENEWD INTO THE CNTRL AND ERN DAKOTAS DURING THE LATE
EVENING AND OVERNIGHT PERIOD. STEEP LAPSE RATES AND INCREASING
VERTICAL SHEAR PROFILES IN THE EXIT REGION OF AN EJECTING MID-LEVEL
JET MAY SUPPORT A THREAT FOR HAIL WITH THE STRONGER CELLS. NONE OF
THE ACTIVITY IS EXPECTED TO BE ORGANIZED.

..BROYLES.. 04/19/2008

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KOTX [191700]: Preliminary Local Storm Report

NWUS56 KOTX 191700
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
1000 AM PDT SAT APR 19 2008

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

0959 AM HEAVY SNOW 1 SSE EASTPORT 48.98N 116.17W
04/19/2008 M4.0 INCH BOUNDARY ID TRAINED SPOTTER

BOUNDARY 6 2800 FT OVERNIGHT TOTAL STILL SNOWING

&&

$$

RB

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KSEW [191648]: Preliminary Local Storm Report

NWUS56 KSEW 191648
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
948 AM PDT SAT APR 19 2008

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

0943 AM SNOW 4 NNW EATONVILLE 46.93N 122.30W
04/19/2008 M0.8 INCH PIERCE WA TRAINED SPOTTER

STILL SNOWING.

0945 AM SNOW UTSALADY 48.25N 122.48W
04/19/2008 M6.0 INCH ISLAND WA PUBLIC

CALLER WAS ON NORTH SIDE OF CAMANO ISLAND AT ELEVATION
461 FEET. TOTAL FROM LAST EVENING AND STILL SNOWING.

&&

$$

GRUB

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KSEW [191617]: Preliminary Local Storm Report

NWUS56 KSEW 191617
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
917 AM PDT SAT APR 19 2008

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

0739 AM SNOW 4 SW EVERETT 47.92N 122.25W
04/19/2008 M7.7 INCH SNOHOMISH WA TRAINED SPOTTER

TOTAL SNOWFALL.

0815 AM SNOW NNE ANACORTES 48.50N 122.63W
04/19/2008 U0.0 INCH SKAGIT WA TRAINED SPOTTER

SNOWING NOW. NOT STICKING TO SURFACES. 34 DEGREES.

0815 AM SNOW 5 NNW GRAND MOUND 46.88N 123.04W
04/19/2008 M1.0 INCH THURSTON WA TRAINED SPOTTER

STILL SNOWING.

&&

$$

GRUB

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 191557
SWODY1
SPC AC 191555

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1055 AM CDT SAT APR 19 2008

VALID 191630Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SOUTHEAST...

COLD UPPER LOW CURRENTLY SRN IL WILL TRACK EWD ACROSS KY THIS
FORECAST PERIOD. DRY SLOT ROTATING EWD ACROSS TN VALLEY TO S OF LOW
WILL AID IN STEEPENING LAPSE RATES INTO CENTRAL APPALACHIANS AND
INLAND PORTIONS OF THE MID ATLANTIC STATES THIS AFTERNOON AND
EVENING.

BAND OF CLOUDS/SHOWERS AHEAD OF COLD FRONT NOW LOCATED FROM CENTRAL
KY SWD INTO GA WILL SPREAD EWD...MOISTENING THE LOW LEVELS IN THEIR
WAKE ACROSS THE CENTRAL APPALACHIANS. AIR MASS WILL THEN DESTABILIZE
AHEAD OF UPPER LOW IN KY EWD TO APPALACHIANS DURING AFTERNOON AS
LAPSE RATES STEEPEN IN THE DRY SLOT. WHILE MLCAPE EXPECTED TO
GENERALLY BE AOB 500 J/KG GIVEN THE LIMITED MOISTURE...40-50KT OF
DEEP LAYER SHEAR COUPLED WITH LOWERING FREEZING LEVELS IN ADVANCE OF
UPPER LOW SUPPORT THUNDERSTORMS BY MID AFTERNOON. A FEW STORMS
EXPECTED TO REACH TO NEAR SEVERE LEVELS WITH HAIL THE PRIMARY THREAT
GIVEN MID LEVEL LAPSE RATES IN EXCESS OF 7C/KM AND THE LOWERING
FREEZING LEVELS.

STORMS WILL LIKELY EVOLVE INTO MORE OF A LINEAR MODE BY THIS EVENING
AS THEY SPREAD E OF THE CENTRAL APPALACHIANS WITH A LOW END WIND
DAMAGE THREAT CONTINUING.

..HALES/HURLBUT.. 04/19/2008

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KDMX [191551]: Preliminary Local Storm Report

NWUS53 KDMX 191551
LSRDMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1051 AM CDT SAT APR 19 2008

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

1128 PM FLOOD 11 S WATERLOO 42.33N 92.32W
04/18/2008 BLACK HAWK IA LAW ENFORCEMENT

HESS ROAD CLOSED BETWEEN REINBECK RD AND EAGLE RD.

1247 AM FLOOD 4 SW WATERLOO 42.46N 92.42W
04/19/2008 BLACK HAWK IA LAW ENFORCEMENT

RANCHERO ROAD CLOSED BETWEEN SERGEANT RD AND DEWITT RD.

1247 AM FLOOD 3 WSW WATERLOO 42.48N 92.41W
04/19/2008 BLACK HAWK IA LAW ENFORCEMENT

BLACK HAWK ROAD CLOSED JUST EAST OF CEDAR HEIGHTS RD.

1247 AM FLOOD 3 E NEW HARTFORD 42.57N 92.55W
04/19/2008 BLACK HAWK IA LAW ENFORCEMENT

BUTLER ROAD CLOSED JUST SOUTH OF BEAVER VALLEY RD.

1247 AM FLOOD 4 WNW DUNKERTON 42.60N 92.23W
04/19/2008 BLACK HAWK IA LAW ENFORCEMENT

BENNINGTON ROAD CLOSED BETWEEN RAYMOND RD AND CRANE CREEK
RD.

&&

$$

BMOYER

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KDVN [191324]: Preliminary Local Storm Report

NWUS53 KDVN 191324
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
824 AM CDT SAT APR 19 2008

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

0700 AM HEAVY RAIN 5 E CEDAR RAPIDS 41.97N 91.58W
04/19/2008 M0.50 INCH LINN IA TRAINED SPOTTER

24 HOUR TOTAL.

&&

$$

WE

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KDVN [191259]: Preliminary Local Storm Report

NWUS53 KDVN 191259
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
759 AM CDT SAT APR 19 2008

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

0758 AM HEAVY RAIN EDGEWOOD 42.64N 91.40W
04/19/2008 M0.86 INCH DELAWARE IA TRAINED SPOTTER

IN LAST 24 HOURS.

&&

$$

WE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 191232
SWODY1
SPC AC 191229

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0729 AM CDT SAT APR 19 2008

VALID 191300Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SOUTHEAST...
WATER VAPOR IMAGERY AND MODEL GUIDANCE SHOW A DEEP CLOSED LOW OVER
IL...WITH A SHORTWAVE TROUGH EXTENDING SOUTHEASTWARD FROM LOW INTO
PARTS OF TN/CAROLINAS/GEORGIA. A BAND OF WEAKENING CONVECTION
STRETCHES FROM EASTERN KY INTO WESTERN NC AND EVENTUALLY INTO
SOUTHERN GA. THIS BAND WILL MOVE EASTWARD AND LIKELY WEAKEN THROUGH
THE MORNING. MAIN SURFACE COLD FRONT LIES WEST OF THIS
PRECIPITATION AND LATEST VISIBLE SATELLITE IMAGERY SUGGESTS THE
POTENTIAL FOR DAYTIME HEATING AND DESTABILIZATION AHEAD OF FRONT
OVER THE MID ATLANTIC AND CAROLINAS THIS AFTERNOON. FORECAST
SOUNDINGS IN THIS AREA INDICATE MLCAPE VALUES WILL STRUGGLE TO
EXCEED 500 J/KG. THIS WILL TEND TO LIMIT UPDRAFT STRENGTH AND
OVERALL SEVERE THREAT. HOWEVER...MODERATELY STRONG MID LEVEL FLOW
AND SOME DRY AIR ALOFT SUGGEST THE POTENTIAL FOR GUSTY WINDS IN
STRONGER CELLS THIS AFTERNOON AND EARLY EVENING.

ELSEWHERE...ISOLATED THUNDERSTORMS WILL BE POSSIBLE TODAY OVER PARTS
OF THE GREAT LAKES REGION...NORTHERN ROCKIES...AND PACIFIC NORTHWEST
COAST. LIMITED INSTABILITY AND MOISTURE IN THESE AREAS ARE EXPECTED
TO PRECLUDE A THREAT OF ORGANIZED SEVERE STORMS.

..HART/GRAMS.. 04/19/2008

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 190903
SWOD48
SPC AC 190902

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0402 AM CDT SAT APR 19 2008

VALID 221200Z - 271200Z

...DISCUSSION...

SOME THREAT FOR STRONG TO SEVERE STORMS MAY EXIST TUESDAY DAY 4 IN
ASSOCIATION WITH SHORTWAVE TROUGH AND ATTENDANT COLD FRONT EJECTING
ENEWD THROUGH THE GREAT LAKES AND NRN OH VALLEY. HOWEVER...POTENTIAL
FOR WIDESPREAD CLOUDS AND ONGOING STORMS LENDS UNCERTAINTY REGARDING
THE DEGREE OF INSTABILITY AND OVERALL SEVERE POTENTIAL. OTHER STORMS
MIGHT DEVELOP FARTHER SOUTH AND SOUTHWEST ALONG THE COLD FRONT FROM
THE OH VALLEY INTO TX. HOWEVER...HEIGHT RISES IN WAKE OF LEAD WAVE
AND TENDENCY FOR THE MOIST WARM SECTOR TO REMAIN SOUTH OF THE
STRONGER UPPER FLOW LOWERS CONFIDENCE IN OVERALL EXTENT OF SEVERE
THREAT.

BEYOND DAY 4...MODELS BEGIN TO DIVERGE WITH THE ECMWF AMPLIFYING A
STRONGER WAVE INTO THE GREAT BASIN VERSUS THE MORE ZONAL PATTERN
WITH THE GFS. IN EITHER CASE...THE FRONT MAY BEGIN TO RETREAT NWD
THROUGH TX...AND MODELS SUGGEST A SRN STREAM WAVE COULD INTERACT
WITH THIS BOUNDARY. SOME THREAT FOR SEVERE STORMS WILL EXIST ACROSS
TX IN VICINITY OF THE FRONT AS WELL AS FARTHER NORTH WITHIN WARM
ADVECTION REGIME OVER OK. HOWEVER...WEAK AMBIENT UPPER FLOW AND
TENDENCY FOR THE MODELS TO BEGIN TO DIVERGE SUGGEST CONFIDENCE IS
NOT HIGH ENOUGH TO INTRODUCE AN AREA AT THIS TIME.

BEYOND DAY 5...SIGNIFICANT DISPERSION IN THE MREF...ECMWF AND GFS
SUGGESTS PREDICTABILITY IS TOO LOW TO INTRODUCE AN AREA THIS
FORECAST PERIOD.

..DIAL.. 04/19/2008

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 190734
SWODY3
SPC AC 190731

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0231 AM CDT SAT APR 19 2008

VALID 211200Z - 221200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM PARTS ERN PARTS OF THE
CNTRL PLAINS INTO THE MID-UPPER MS VALLEY...

...SYNOPSIS...

MODEL CONSENSUS IS THAT AN UPPER JET MAX WILL EJECT NWD ALONG THE
ERN PERIPHERY OF WRN U.S. UPPER THROUGH THE DAKOTAS MONDAY...WHILE
ANOTHER SHORTWAVE TROUGH EJECTS NEWD INTO THE CNTRL PLAINS MONDAY
EVENING REACHING THE UPPER MS VALLEY LATE MONDAY NIGHT. IN WAKE OF
THE LEAD IMPULSE A COLD FRONT WILL MOVE EWD AND SWD INTO THE UPPER
MS VALLEY AND THROUGH THE CNTRL PLAINS. BY MONDAY EVENING THE FRONT
IS FORECAST TO EXTEND FROM MN SWWD THROUGH SWRN KS...AND FROM WRN WI
SWWD INTO NRN OK BY THE END OF THIS PERIOD. DRYLINE WILL EXTEND FROM
NEAR THE BIG BEND AREA OF TX NWD THROUGH CNTRL OK AND SRN KS WHERE
IT WILL INTERSECT THE FRONT.

...NERN KS AND ERN NEB THROUGH IA AND MN SRN MN...

RICHER LOW LEVEL MOISTURE WITH MID 60S ACROSS ERN KS AND MO TO THE
UPPER 50S FARTHER NORTH INTO MN WILL ADVECT NWD INTO THE PRE-FRONTAL
WARM SECTOR. SWLY MID LEVEL FLOW WILL MAINTAIN AN EML OVER MUCH OF
THIS REGION. THESE PROCESSES WILL RESULT IN MODERATE INSTABILITY
FROM ERN KS INTO THE MID MS VALLEY WITH MARGINAL INSTABILITY LIKELY
FARTHER NORTH ACROSS THE UPPER MS VALLEY. HOWEVER...CURRENT
INDICATIONS ARE THAT THE EML WILL LIKELY CONTRIBUTE TO A STRONG CAP
OVER MUCH OF THE WARM SECTOR. THE CAP AND POTENTIAL FOR LARGE SCALE
SUBSIDENCE IN WAKE OF THE LEAD WAVE SUGGEST IT MAY BE DIFFICULT TO
INITIATE SURFACE BASED STORMS DURING THE DAY. INITIAL STORMS MAY
DEVELOP ALONG THE COLD FRONT ACROSS PARTS OF MN WHERE CAP WILL BE
WEAKER ON NRN PERIPHERY OF THE EML. INCREASING LARGE SCALE ASCENT
ASSOCIATED WITH EJECTING SHORTWAVE TROUGH AND STRENGTHENING LOW
LEVEL JET SHOULD RESULT IN SUFFICIENT LIFT FOR STORMS TO INITIATE
MAINLY ALONG AND NORTH OF THE FRONT DURING THE EVENING AND OVERNIGHT
FROM PARTS OF ERN NEB INTO IA. ACTIVITY COULD DEVELOP AS FAR SW AS
NERN KS. EFFECTIVE SHEAR FROM 30 TO 40 KT...STEEP MID LAPSE RATES
AND MODERATE INSTABILITY SUGGEST A FEW OF THE STORMS COULD PRODUCE
ISOLATED LARGE HAIL AND STRONG WIND GUSTS.

...OK AND TX...

THE ATMOSPHERE WILL LIKELY BECOME MODERATELY TO STRONGLY UNSTABLE AS
RICHER LOW LEVEL MOISTURE RETURNS NWD BENEATH STEEP MID LEVEL LAPSE
RATES. HOWEVER...EXPECTATION OF A STRONG CAP AND TENDENCY FOR DEEPER
FORCING FOR ASCENT TO REMAIN NW OF THIS REGION SUGGEST THE DRYLINE
WILL PROBABLY REMAIN INACTIVE.

..DIAL.. 04/19/2008

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KSEW [190704]: Preliminary Local Storm Report

NWUS56 KSEW 190704
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1204 AM PDT SAT APR 19 2008

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

1155 PM SNOW 2 SW EVERETT 47.94N 122.24W
04/18/2008 M3.0 INCH SNOHOMISH WA TRAINED SPOTTER

1200 AM SNOW 3 NE MILL CREEK 47.89N 122.16W
04/19/2008 M7.6 INCH SNOHOMISH WA NWS EMPLOYEE

&&

$$

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WATCHES: Tornado Watch - Number 208

WWUS20 KWNS 190703
SEL8
SPC WW 190703
ALZ000-FLZ000-CWZ000-190500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH - NUMBER 208
NWS STORM PREDICTION CENTER NORMAN OK
203 AM CDT SAT APR 19 2008

THE NWS STORM PREDICTION CENTER HAS CANCELLED
TORNADO WATCH NUMBER 208 ISSUED AT 640 PM CDT FOR PORTIONS OF

ALABAMA
FLORIDA
COASTAL WATERS

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KSEW [190601]: Preliminary Local Storm Report

NWUS56 KSEW 190601
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1101 PM PDT FRI APR 18 2008

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

1055 PM SNOW 2 N WOODINVILLE 47.78N 122.11W
04/18/2008 M6.5 INCH SNOHOMISH WA TRAINED SPOTTER

&&

$$

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KSEW [190526]: Preliminary Local Storm Report

NWUS56 KSEW 190526
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1026 PM PDT FRI APR 18 2008

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

0935 PM SNOW MILL CREEK 47.86N 122.21W
04/18/2008 M6.2 INCH SNOHOMISH WA NWS EMPLOYEE

0950 PM SNOW EDMONDS 47.83N 122.37W
04/18/2008 M3.5 INCH SNOHOMISH WA TRAINED SPOTTER

1015 PM SNOW CLEARVIEW 47.83N 122.12W
04/18/2008 M10.2 INCH SNOHOMISH WA TRAINED SPOTTER

10.25 INCHES SINCE 2 PM AT 593 FEET.

1015 PM SNOW SHORELINE 47.76N 122.34W
04/18/2008 M3.5 INCH KING WA TRAINED SPOTTER

&&

$$

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 190455
SWODY2
SPC AC 190453

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1153 PM CDT FRI APR 18 2008

VALID 201200Z - 211200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...

LARGE UPPER TROUGH CURRENTLY OVER SRN BRITISH COLUMBIA WILL AMPLIFY
OVER THE WRN STATES THROUGH EARLY SUNDAY. A SRN BRANCH SHORTWAVE
TROUGH CURRENTLY OFF THE CA COAST IS FORECAST TO EJECT NEWD INTO THE
CNTRL AND NRN PLAINS. VEERING DEEP LAYER FLOW IN WAKE OF SHORTWAVE
TROUGH EJECTING NWD ALONG ERN PERIPHERY OF UPPER LOW WILL PROVIDE
IMPETUS FOR A COLD FRONT TO SURGE EWD AND SEWD THROUGH THE NRN AND
CNTRL PLAINS. FARTHER EAST...THE CUTOFF UPPER LOW WILL DRIFT SLOWLY
EAST INTO VA AND THE CAROLINAS.

...NRN PLAINS AREA...

BOUNDARY LAYER MOISTURE IN THIS REGION WILL REMAIN LIMITED WITH
DEWPOINTS IN THE UPPER 30S TO LOW 40S EXPECTED. HOWEVER...PRESENCE
OF STEEP 850-500 MB LAPSE RATES AND SURFACE HEATING WILL CONTRIBUTE
TO MARGINAL INSTABILITY WITH MLCAPE BELOW 500 J/KG EXPECTED. STRONG
BOUNDARY LAYER HEATING AND MIXING AND LARGE SCALE ASCENT ATTENDING
NWD EJECTING SHORTWAVE TROUGH WILL SERVE TO WEAKEN ANY CAP. STORMS
ARE EXPECTED TO DEVELOP ALONG FRONT BY EARLY EVENING AS IT SURGES
EWD INTO THE WRN DAKOTAS THEN SHIFT EWD OVERNIGHT. ISOLATED STRONG
WIND GUSTS AND HAIL WILL BE POSSIBLE WITH THE STRONGER STORMS. WILL
MAINTAIN 5% SEVERE PROBABILITIES FOR THIS REGION. HOWEVER...AT THIS
TIME IT APPEARS THE OVERALL SEVERE THREAT SHOULD REMAIN LIMITED BY
MARGINAL INSTABILITY.

...NC THROUGH MID ATLANTIC...

UPPER TROUGH AND ITS ATTENDANT OCCLUDED SURFACE LOW WILL DRIFT EAST
INTO VA...MD AND NC DURING THE DAY. SCATTERED STORMS WILL LIKELY
PERSIST WITHIN ZONE OF ASCENT ALONG LOW LEVEL CONFLUENCE BAND FROM
PARTS OF ERN NC NWWD THROUGH PARTS OF THE MID ATLANTIC. WEST OF THIS
BAND ACROSS CNTRL NC AND CNTRL VA...COLD MID LEVEL TEMPERATURES WITH
-18 TO -20C AT 500 MB WILL CONTRIBUTE TO NEAR 7C/KM MID LEVEL LAPSE
RATES. AS THE BOUNDARY LAYER WARMS...MLCAPE NEAR 500 J/KG WILL BE
POSSIBLE. ADDITIONAL STORMS WILL LIKELY DEVELOP IN THIS REGION AS
THE BOUNDARY LAYER DESTABILIZES. SOME OF THIS ACTIVITY MIGHT BECOME
CAPABLE OF PRODUCING HAIL DURING THE AFTERNOON BEFORE SUBSIDING
OVERNIGHT.

..DIAL.. 04/19/2008

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 190438
SWODY1
SPC AC 190434

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1134 PM CDT FRI APR 18 2008

VALID 191200Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
UPPER AIR PATTERN TRANSITION IS UNDERWAY...AS LARGE CYCLONE NOW
CENTERED OVER SRN BC BECOMES MORE FIRMLY ESTABLISHED OVER PACIFIC
NW. SEVERAL MESOSCALE VORTICITY CENTERS/LOBES ARE EXPECTED TO
ROTATE AROUND BROADER SCALE CYCLONE CENTER OVER THAT REGION...WITH
STG HEIGHT FALLS LIKELY ACROSS MUCH OF CENTRAL/NRN GREAT BASIN
REGION. AS THAT OCCURS...DOWNSTREAM CENTRAL CONUS RIDGE WILL SHIFT
EWD...ALONG WITH SMALLER BUT STILL WELL DEFINED MID/UPPER LOW NOW
OVER MO. LATTER CYCLONE IS EXPECTED TO MOVE ESEWD TO CENTRAL
APPALACHIANS BY END OF PERIOD...AS IT BEGINS TO UNDERCUT ERN CONUS
RIDGE AND TREND TOWARD REX PATTERN OVER ADJACENT ATLANTIC WATERS.
WITH EACH RUN TIME...MORE DETERMINISTIC AND ENSEMBLE GUIDANCE
PACKAGES ARE TRENDING TOWARD THIS SCENARIO AS OPPOSED TO NEWD
EJECTION AROUND RIDGING.

ASSOCIATED SFC CYCLONE -- NOW EVIDENT OVER UPPER MS VALLEY -- IS
EXPECTED TO OCCLUDE AND FILL SOMEWHAT...MOVING ENEWD TOWARD LOWER
MI. ACCOMPANYING COLD FRONT WILL MOVE EWD ACROSS E GULF COASTAL
PLAIN AND MUCH OF GA BY 20/00Z. BOUNDARY WILL BE GRADUALLY
FRONTOLYTIC...LOSING MUCH OF ITS THERMAL DEFINITION BUT STILL
APPARENT IN MOISTURE AND THETAE GRADIENTS...AND AS SUCH...ACTING
MUCH LIKE EFFECTIVE DRYLINE.

...CENTRAL APPALACHIANS REGION...
ONE OR MORE BANDS OF TSTMS MAY DEVELOP DURING AFTERNOON FROM SRN OH
SEWD ACROSS ERN KY AND WV...AND OVER PORTIONS WRN VA INTO CENTRAL
CAROLINAS. COLDEST AIR ALOFT IS EXPECTED OVER HIGHLANDS OF
WV/KY...WITH STRONGEST SFC HEATING AND SUBCLOUD MIXING PROBABLE
FARTHER S ACROSS CAROLINAS. DEEP-LAYER SHEAR WILL STRENGTHEN WITH
NWWD EXTENT FROM CAROLINAS TOWARD ERN KY...ALTHOUGH LOW LEVEL LAPSE
RATES AND OVERALL BUOYANCY WILL BE MRGL. SOME GUSTS APCHG SVR
LIMITS...AND CAPABLE OF MINOR DAMAGE...MAY OCCUR FROM THIS
ACTIVITY...AND HAIL NEAR SVR LEVELS MAY OCCUR AS WELL. LACK OF MORE
ROBUST INSTABILITY PRECLUDES CATEGORICAL OUTLOOK ATTM. ACTIVITY
SHOULD DIMINISH CONSIDERABLY AFTER 00Z WITH LOSS OF CONTRIBUTION TO
LOW LEVEL BUOYANCY FROM DIABATIC SFC HEATING.

...COASTAL NWRN CONUS...
19/00Z 500 MB ANALYSES SHOWED TEMPS NEAR -40 DEG C...WHICH
CONTRIBUTED TO SFC BASED BUOYANCY IN NRN VANCOUVER ISLAND RAOB YZT
-- DESPITE SFC TEMPS MID 40S F. AS ASSOCIATED AIR MASS ALOFT
SETTLES SWD ACROSS PACIFIC NW...POTENTIAL FOR ISOLATED TO WIDELY
SCATTERED TSTMS WILL INCREASE AMIDST POCKETS OF INLAND DIABATIC
HEATING...AND MORE FAVORABLE BOUNDARY LAYER MOISTURE W OF CASCADES.
WITH EXTREMELY COLD AIR ALOFT...LOW FREEZING LEVELS AND STEEP LAPSE
RATES ATOP PACIFIC MOIST LAYER...EXPECT RELATIVELY SHALLOW DEPTH
BETWEEN ICING LAYERS AND GROUND...ALONG WITH MLCAPES UP TO ABOUT 200
J/KG. THOUGH MOST SHOULD REMAIN BELOW SVR LEVELS...ISOLATED
MRGL-SVR HAIL CANNOT BE RULED OUT.

..EDWARDS/GRAMS.. 04/19/2008

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MESO: Mesoscale Discussion 0666

ACUS11 KWNS 190438
SWOMCD
SPC MCD 190437
ALZ000-FLZ000-190530-

MESOSCALE DISCUSSION 0666
NWS STORM PREDICTION CENTER NORMAN OK
1137 PM CDT FRI APR 18 2008

AREAS AFFECTED...SRN AL/WRN FL PANHANDLE

CONCERNING...TORNADO WATCH 208...

VALID 190437Z - 190530Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 208 CONTINUES.

WW 208 WILL BE EXTENDED IN TIME BEYOND SCHEDULED 05Z EXPIRATION BY
WFO MOB.

04Z WSR-88D VWP AT MOB SHOWED LOW LEVEL WINDS HAVE VEERED TO SWLY
WHICH SHOULD CONTINUE TO SHUNT THE INFLUX OF MOISTURE RETURN TO
PRIMARILY THE WRN FL PANHANDLE AND FAR SRN AL OVERNIGHT. DESPITE
THE VEERED WINDS AT MOB...DOWNSTREAM LOW LEVEL WINDS REMAIN BACKED
/SLY/ ACROSS PARTS OF WRN FL PANHANDLE INTO SOUTH CENTRAL/SERN
AL...AND THUS ARE MAINTAINING STRONGER LOW LEVEL SHEAR ACROSS AT
LEAST THE ERN HALF OF WW 208 WITH 0-1 KM SRH GREATER THAN 350 M2/S2.
TSTMS...SUCH AS THE ONE LOCATED IN MONROE/CONECUH COUNTIES AL...THAT
CONTINUE TO DEVELOP SUSTAINED UPDRAFTS AS THEY MOVE EWD THROUGH THIS
ENVIRONMENT WILL POSE AN ISOLATED TORNADO THREAT AND POTENTIAL FOR
STRONGER WIND GUSTS.

OBJECTIVE ANALYSES DURING THE LAST 1-2 HOURS HAVE INDICATED A
DIMINISHING TREND IN AVAILABLE CONVECTIVE INSTABILITY WHICH MAY BE A
RESULT OF THE VEERING LLJ...AND MAY TEND TO MITIGATE FURTHER
DEVELOPMENT DOWNSTREAM OF WW 208.

..PETERS.. 04/19/2008

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

ATTN...WFO...TAE...BMX...MOB...

29868837 30658837 31418775 31918741 31958608 30418629
30068646

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WATCHES: Tornado Watch - Number 207

WWUS20 KWNS 190403
SEL7
SPC WW 190403
LAZ000-MSZ000-CWZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH - NUMBER 207
NWS STORM PREDICTION CENTER NORMAN OK
1103 PM CDT FRI APR 18 2008

THE NWS STORM PREDICTION CENTER HAS CANCELLED
TORNADO WATCH NUMBER 207 ISSUED AT 345 PM CDT FOR PORTIONS OF

LOUISIANA
MISSISSIPPI
COASTAL WATERS

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