Monday, April 23, 2012

KBYZ [240340]: Preliminary Local Storm Report

NWUS55 KBYZ 240340
LSRBYZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
940 PM MDT MON APR 23 2012

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

0729 PM TSTM WND GST 22 SW FORT SMITH 45.10N 108.22W
04/23/2012 M65 MPH CARBON MT MESONET


&&

$$

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KREV [240205]: Preliminary Local Storm Report

NWUS55 KREV 240205
LSRREV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
705 PM PDT MON APR 23 2012

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

0559 PM TSTM WND GST 8 E MADELINE 41.05N 120.32W
04/23/2012 M58.00 MPH LASSEN CA MESONET

AT BLUE DOOR RAWS. EL. 5615FT. OCCURRED DURING PREVIOUS
HOUR.


&&

$$

JWALLMAN

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KMFR [240157]: Preliminary Local Storm Report

NWUS56 KMFR 240157
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
656 PM PDT MON APR 23 2012

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

0330 PM TSTM WND DMG 3 ESE WILLOW RANCH 41.89N 120.31W
04/23/2012 MODOC CA TRAINED SPOTTER

TREE LIMBS TO 3" DIAMETER BROKEN. REPORTED
BY SPOTTER MO32

&&

$$

IRIS SYSTEM

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KMFR [240155]: Preliminary Local Storm Report

NWUS56 KMFR 240155
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
654 PM PDT MON APR 23 2012

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

0653 PM TSTM WND DMG 3 ESE WILLOW RANCH 41.89N 120.31W
04/23/2012 MODOC CA TRAINED SPOTTER

TREE TOPPLED AT LONE PINE SCHOOL ON SHORE OF
GOOSE LAKE AT STATE LINE. REPORTED BY
SPOTTER MO32

&&

$$

IRIS SYSTEM

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KPDT [240130]: Preliminary Local Storm Report

NWUS56 KPDT 240130
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
630 PM PDT MON APR 23 2012

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

0626 PM HAIL 3 NW ASHWOOD 44.77N 120.80W
04/23/2012 E0.75 INCH JEFFERSON OR TRAINED SPOTTER


&&

$$

JSOLOMON

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KMFR [240118]: Preliminary Local Storm Report

NWUS56 KMFR 240118
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
617 PM PDT MON APR 23 2012

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

0445 PM TSTM WND DMG 9 N ROGUE RIVER 42.56N 123.17W
04/23/2012 JACKSON OR TRAINED SPOTTER

.5" HAIL, 2" DIAMETER BRANCHES BROKEN,
WIDESPREAD BRANCH DEBRIS. REPORTED BY
SPOTTER JA98

&&

$$

IRIS SYSTEM

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KPBZ [231923]: Preliminary Local Storm Report

NWUS51 KPBZ 231923
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
323 PM EDT MON APR 23 2012

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

0300 PM SNOW VALLEY POINT 39.58N 79.64W
04/23/2012 M3.0 INCH PRESTON WV PUBLIC


&&

EVENT NUMBER PBZ1200393

$$

RG

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KPBZ [231919]: Preliminary Local Storm Report

NWUS51 KPBZ 231919
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
318 PM EDT MON APR 23 2012

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

0230 PM SNOW MARIENVILLE 41.45N 79.08W
04/23/2012 M5.0 INCH FOREST PA PUBLIC


&&

EVENT NUMBER PBZ1200392

$$

RG

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KPBZ [231904]: Preliminary Local Storm Report

NWUS51 KPBZ 231904
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
304 PM EDT MON APR 23 2012

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

1218 PM SNOW OAKLAND 39.41N 79.41W
04/23/2012 M8.0 INCH GARRETT MD PUBLIC


&&

EVENT NUMBER PBZ1200391

$$

RG

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KPBZ [231848]: Preliminary Local Storm Report

NWUS51 KPBZ 231848
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
248 PM EDT MON APR 23 2012

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

0230 PM SNOW 2 N THOMAS 39.18N 79.50W
04/23/2012 E5.0 INCH TUCKER WV TRAINED SPOTTER


&&

EVENT NUMBER PBZ1200390

$$

RG

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KMFL [231821]: Preliminary Local Storm Report

NWUS52 KMFL 231821
LSRMFL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
221 PM EDT MON APR 23 2012

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

0250 AM TSTM WND DMG LAKEPORT 26.98N 81.13W
04/22/2012 GLADES FL EMERGENCY MNGR

UPDATE ON DAMAGE IN LAKEPORT EARLY SUNDAY
MORNING...PICTURES SENT FROM EMERGENCY MANAGER THIS
MORNING SUGGEST THAT DAMAGE LIKELY NOT CAUSED BY A
TORNADO BUT INSTEAD BY STRAIGHT LINE WINDS OF 60 TO
POSSIBLY AS HIGH AS 70 MPH. A DOUBLE-WIDE TRAILER WAS
TIPPED OVER BUT THE UNIT WAS NOT TIED DOWN OR SECURED.
ANOTHER MOBILE HOME THAT SUSTAINED ROOF DAMAGE WAS
ALREADY WEAKENED BY PREVIOUS UNREPAIRED DAMAGE.


&&

$$

MOLLEDA

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KPBZ [231802]: Preliminary Local Storm Report

NWUS51 KPBZ 231802
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
202 PM EDT MON APR 23 2012

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

0202 PM SNOW RODNEY 40.15N 79.42W
04/23/2012 M7.0 INCH WESTMORELAND PA EMERGENCY MNGR

SNOW DEPTH.


&&

EVENT NUMBER PBZ1200389

$$

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KPBZ [231757]: Preliminary Local Storm Report

NWUS51 KPBZ 231757
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
157 PM EDT MON APR 23 2012

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

1135 AM HEAVY SNOW 5 ESE COMMODORE 40.69N 78.86W
04/23/2012 U0.0 INCH INDIANA PA EMERGENCY MNGR

TREES DOWN ON STARFORD ROAD DUE TO HEAVY SNOW


&&

EVENT NUMBER PBZ1200388

$$

098

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KPBZ [231716]: Preliminary Local Storm Report

NWUS51 KPBZ 231716
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
116 PM EDT MON APR 23 2012

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

0116 PM SNOW AURORA 39.32N 79.55W
04/23/2012 M5.0 INCH PRESTON WV PUBLIC


&&

EVENT NUMBER PBZ1200387

$$



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KPBZ [231705]: Preliminary Local Storm Report

NWUS51 KPBZ 231705
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
105 PM EDT MON APR 23 2012

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

0104 PM SNOW 3 SE DAVIS 39.10N 79.43W
04/23/2012 M5.2 INCH TUCKER WV PUBLIC

SNOW DEPTH. 2.4 INCHES NEW SNOW IN PAST 6 HOURS.


&&

EVENT NUMBER PBZ1200386

$$



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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 231651
SWODY2
SPC AC 231650

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1150 AM CDT MON APR 23 2012

VALID 241200Z - 251200Z

...NO SVR TSTM AREAS FORECAST...

...SERN NEB TO WRN KY...

UPPER RIDGE IS EXPECTED TO HOLD ACROSS THE ROCKIES THROUGH THE DAY2
PERIOD WITH WEAK HEIGHT RISES POSSIBLE INTO THE MID MS/TN VALLEY
REGION LATE. AS SFC HIGH SETTLES INTO THE GULF OF MEXICO SLY FLOW
SHOULD INCREASE ACROSS THE PLAINS AND A WARM FRONT SHOULD ESTABLISH
ITSELF ORIENTED ALONG AN AXIS FROM THE NEB/KS BORDER...SEWD INTO WRN
KY BY 25/00Z. THE DEVELOPING WARM FRONT SHOULD SERVE AS THE FOCUS
FOR POSSIBLE CONVECTION...PRIMARILY DURING THE LATTER HALF OF THE
PERIOD.

LATEST NAM SUGGESTS STRONG BOUNDARY LAYER HEATING WILL OCCUR ACROSS
THE PLAINS WHICH WILL ALLOW SFC TEMPERATURES TO SOAR INTO THE UPPER
80S INTO THE LOWER 90S ALONG THE PLAINS PORTION OF THE WARM FRONT
NEAR THE KS BORDER. IN FACT PFC FOR CNK AT 23Z EXHIBITS SBCAPE ON
THE ORDER OF 1300 J/KG WITH A 94/45 TEMP/DEW POINT. IF THIS TYPE OF
READING IS ATTAINED CONVECTIVE TEMPERATURE WILL BE REACHED AND HIGH
BASED CONVECTION COULD DEVELOP DURING THE LATE AFTERNOON. A SLOW
SSEWD MOVEMENT OFF THE BOUNDARY WOULD THEN BE POSSIBLE ACROSS
PORTIONS OF NERN KS. GUSTY WINDS AND PERHAPS SOME HAIL COULD BE
NOTED INTO THE EVENING HOURS.

ANOTHER ZONE WHERE TSTMS MAY DEVELOP WILL BE FARTHER EAST ACROSS THE
MID MS VALLEY WITHIN A ZONE OF INCREASING WARM ADVECTION. WNWLY
45KT LLJ IS EXPECTED TO INCREASE DURING THE OVERNIGHT HOURS AND THIS
MAY PROVIDE SUFFICIENT LIFT FOR ELEVATED CONVECTION. MARGINALLY
SEVERE HAIL COULD ACCOMPANY THE STRONGEST UPDRAFTS AS THEY SPREAD
SEWD INTO THE TN VALLEY LATE.

...NRN ROCKIES...

UPPER RIDGE MAY FLATTEN SLIGHTLY ACROSS THE NRN ROCKIES TUESDAY
AFTERNOON BUT PRIMARILY SFC-BASED HEATING WILL BE THE INSTIGATOR IN
CONVECTIVE DEVELOPMENT. LOW LEVEL MOISTURE SHOULD REMAIN SOMEWHAT
MARGINAL WITH PW VALUES EXPECTED TO ONLY RANGE FROM .50-60 INCH.
EVEN SO RELATIVELY STEEP LAPSE RATES WILL SUPPORT CONVECTIVE
DEVELOPMENT AND ANY STORMS THAT FORM ACROSS ERN ORE INTO SWRN MT
WILL DO SO WITHIN A ZONE OF MODEST DEEP LAYER SHEAR THAT COULD
SUPPORT ORGANIZED MULTI-CELL UPDRAFTS. MARGINAL SEVERE HAIL IS THE
MAIN THREAT WITH THIS ACTIVITY.

..DARROW.. 04/23/2012

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KPBZ [231646]: Preliminary Local Storm Report

NWUS51 KPBZ 231646
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1246 PM EDT MON APR 23 2012

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

1245 PM SNOW FARMINGTON 39.81N 79.57W
04/23/2012 M4.6 INCH FAYETTE PA TRAINED SPOTTER

SNOW DEPTH. 3.0 NEW SINCE 7 AM. 33 DEGREES.


&&

EVENT NUMBER PBZ1200385

$$



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KPBZ [231623]: Preliminary Local Storm Report

NWUS51 KPBZ 231623
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1223 PM EDT MON APR 23 2012

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

1045 AM HEAVY SNOW SIGEL 41.28N 79.12W
04/23/2012 U0.0 INCH JEFFERSON PA EMERGENCY MNGR

TREES DOWN DUE TO HEAVY SNOW ON RISHER ROAD


&&

EVENT NUMBER PBZ1200384

$$

098

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KPBZ [231619]: Preliminary Local Storm Report

NWUS51 KPBZ 231619
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1219 PM EDT MON APR 23 2012

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

1218 PM SNOW OAKLAND 40.44N 79.96W
04/23/2012 M8.0 INCH ALLEGHENY PA PUBLIC


&&

EVENT NUMBER PBZ1200383

$$



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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231610
SWODY1
SPC AC 231608

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1108 AM CDT MON APR 23 2012

VALID 231630Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
AN AMPLIFIED FLOW REGIME WILL PERSIST OVER THE CONUS WITH A DEEP LOW
AND OCCLUDING CYCLONE INVOF THE LOWER GREAT LAKES...AND AN UPSTREAM
RIDGE OVER THE ROCKIES. AN EMBEDDED SHORTWAVE TROUGH IS EJECTING
NWD FROM SRN CA TOWARD THE GREAT BASIN...AROUND THE WRN PERIPHERY OF
THE ROCKIES RIDGE. A BROAD PLUME OF STEEP LOW-MIDLEVEL LAPSE RATES
COVERS MUCH OF THE INTERMOUNTAIN WEST IN RESPONSE TO SEVERAL DAYS OF
STRONG SURFACE HEATING...AND WIDELY SCATTERED THUNDERSTORMS ARE
EXPECTED WITHIN THIS LAPSE RATE PLUME AGAIN TODAY...PRIMARILY OVER
THE HIGHER TERRAIN OF THE ROCKIES...NRN SIERRA...AND ORE CASCADES
THIS AFTERNOON/EVENING.

...NRN CA/ORE TO THE NRN ROCKIES THIS AFTERNOON AND TONIGHT...
AN INCREASE IN PW OF 0.1-0.2 INCH HAS BEEN NOTED SINCE YESTERDAY
ACROSS THE INTERIOR PAC NW/NRN GREAT BASIN/NRN ROCKIES AREA.
MIDLEVEL LAPSE RATES REMAIN STEEP /AOA 7.5 C PER KM/...AND DAYTIME
HEATING OVER THE HIGH TERRAIN SHOULD SUPPORT WIDELY-SCATTERED TO
SCATTERED THUNDERSTORM DEVELOPMENT THIS AFTERNOON. THE MORE
PROBABLE ZONES FOR STORM INITIATION WILL BE ACROSS N/NE CA NWD TO
NEAR AND JUST E OF THE CASCADES IN ORE...WITH OTHER STORM
DEVELOPMENT EXPECTED OVER THE HIGH TERRAIN OF NRN ID/WRN MT. MLCAPE
OF 500-1000 J/KG AND DEEP-LAYER SSWLY WIND PROFILES WILL SUPPORT A
RISK OF ISOLATED LARGE HAIL/DAMAGING WINDS WITH THE STRONGEST
STORMS...AND A STORM OR TWO WITH SUPERCELL STRUCTURE WILL BE
POSSIBLE ACROSS ORE THIS EVENING.

..THOMPSON/COHEN.. 04/23/2012

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KPBZ [231551]: Preliminary Local Storm Report

NWUS51 KPBZ 231551
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1151 AM EDT MON APR 23 2012

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

1151 AM SNOW ACME 40.13N 79.43W
04/23/2012 M9.0 INCH WESTMORELAND PA PUBLIC

SNOW DEPTH.


&&

EVENT NUMBER PBZ1200382

$$

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KPBZ [231437]: Preliminary Local Storm Report

NWUS51 KPBZ 231437
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1037 AM EDT MON APR 23 2012

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

1036 AM SNOW ACME 40.13N 79.43W
04/23/2012 M8.0 INCH WESTMORELAND PA PUBLIC


&&

EVENT NUMBER PBZ1200381

$$



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KBUF [231432]: Preliminary Local Storm Report

NWUS51 KBUF 231432
LSRBUF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
1032 AM EDT MON APR 23 2012

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

1000 AM DAMAGING SNOW FREWSBURG 42.06N 79.16W
04/23/2012 CHAUTAUQUA NY AMATEUR RADIO

TREES AND POWERLINES DOWN


&&

EVENT NUMBER BUF1200093

$$

DK

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KPBZ [231429]: Preliminary Local Storm Report...corrected

NWUS51 KPBZ 231429
LSRPBZ

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PITTSBURGH PA
1029 AM EDT MON APR 23 2012

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

0635 AM SNOW 3 ESE CHAMPION 40.06N 79.31W
04/23/2012 M5.0 INCH WESTMORELAND PA DEPT OF HIGHWAYS


&&

CORRECTED EVENT

EVENT NUMBER PBZ1200364

$$

JMP

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KGSP [231405]: Preliminary Local Storm Report

NWUS52 KGSP 231405
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1005 AM EDT MON APR 23 2012

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

0700 AM SNOW MOUNT MITCHELL STATE PA 35.77N 82.26W
04/23/2012 M2.0 INCH YANCEY NC CO-OP OBSERVER

2 INCHES OF SNOWFALL


&&

$$

JPT

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KGSP [231404]: Preliminary Local Storm Report

NWUS52 KGSP 231404
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1004 AM EDT MON APR 23 2012

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

0700 AM SNOW BEECH MOUNTAIN 36.19N 81.87W
04/23/2012 M1.0 INCH AVERY NC CO-OP OBSERVER

1 INCH OF SNOWFALL


&&

$$

JPT

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KBUF [231318]: Preliminary Local Storm Report

NWUS51 KBUF 231318
LSRBUF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
917 AM EDT MON APR 23 2012

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

0850 AM DAMAGING SNOW WELLSVILLE 42.12N 77.95W
04/23/2012 ALLEGANY NY LAW ENFORCEMENT

NUMEROUS REPORTS OF TREES AND POWERLINES DOWN
THROUGHOUT THE COUNTY


&&

EVENT NUMBER BUF1200092

$$

TMA

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KRAH [231253]: Preliminary Local Storm Report

NWUS52 KRAH 231253
LSRRAH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
852 AM EDT MON APR 23 2012

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

0708 PM TSTM WND DMG 1 SW LEGGETT 35.98N 77.60W
04/21/2012 EDGECOMBE NC DEPT OF HIGHWAYS

ONE TREE BLOWN DOWN JUST WEST OF LEGGETT. TIME
ESTIMATED.


&&

EVENT NUMBER RAH1200176

$$

DJF

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231224
SWODY1
SPC AC 231222

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0722 AM CDT MON APR 23 2012

VALID 231300Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...

UPPER TROUGH OVER THE ERN PACIFIC WILL FRACTURE THIS PERIOD WITH NRN
BRANCH OF SYSTEM PROGRESSING INTO WRN CANADA...WHILE THE SRN PORTION
MOVES SSEWD AS A CUT-OFF LOW W OF THE CA COAST. THIS EVOLUTION
COUPLED WITH THE NEWD PROGRESSION OF A VORTICITY MAXIMUM /CURRENTLY
NEAR NRN BAJA/ WILL LEAD TO LOWERING MIDLEVEL HEIGHTS ACROSS THE NRN
ROCKIES INTO GREAT BASIN...AND A GRADUAL EWD SHIFT OF PRONOUNCED
MIDLEVEL RIDGE ACROSS THE INTER-MOUNTAIN WEST.

...NRN GREAT BASIN INTO PACIFIC NW AND NRN ROCKIES THIS AFTERNOON
AND EVENING...

AS MENTIONED ABOVE...MIDLEVEL HEIGHTS WILL BEGIN TO LOWER ACROSS THE
REGION TODAY...POTENTIALLY LEADING TO A GREATER COVERAGE IN
AFTERNOON/EVENING TSTM DEVELOPMENT THAN THAT OBSERVED ON SUNDAY.
12Z REGIONAL SOUNDINGS INDICATE THAT AIR MASS HAS MOISTENED OVER THE
PAST 24-HR WITH SIMILAR STEEP LAPSE RATE PROFILES...SUPPORTIVE OF
AFTERNOON SBCAPE VALUES OF AROUND 1000 J/KG. THIS INSTABILITY WILL
COINCIDE WITH A KINEMATIC ENVIRONMENT FEATURING 40-50 KT OF
DEEP-LAYER SHEAR WHICH WILL PROMOTE ORGANIZED/ROTATING UPDRAFTS
CAPABLE OF ISOLATED OCCURRENCES OF SEVERE HAIL AND LOCALLY DAMAGING
WIND GUSTS.

..MEAD/LEITMAN.. 04/23/2012

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KPBZ [231125]: Preliminary Local Storm Report

NWUS51 KPBZ 231125
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
725 AM EDT MON APR 23 2012

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

0724 AM SNOW FARMINGTON 39.81N 79.57W
04/23/2012 M1.6 INCH FAYETTE PA TRAINED SPOTTER

SNOW WATER EQUIVALENT 0.32 INCHES


&&

EVENT NUMBER PBZ1200378

$$



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KPBZ [231116]: Preliminary Local Storm Report

NWUS51 KPBZ 231116
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
716 AM EDT MON APR 23 2012

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

0716 AM SNOW CANAAN HEIGHTS 39.10N 79.43W
04/23/2012 M3.0 INCH TUCKER WV CO-OP OBSERVER


&&

EVENT NUMBER PBZ1200377

$$

JMP

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KPBZ [231109]: Preliminary Local Storm Report

NWUS51 KPBZ 231109
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
709 AM EDT MON APR 23 2012

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

0708 AM SNOW 3 E LAUGHLINTOWN 40.21N 79.14W
04/23/2012 M5.0 INCH WESTMORELAND PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200376

$$

JMP

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KPBZ [231102]: Preliminary Local Storm Report

NWUS51 KPBZ 231102
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
702 AM EDT MON APR 23 2012

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

0701 AM SNOW 2 E ACME 40.13N 79.39W
04/23/2012 M4.0 INCH WESTMORELAND PA PUBLIC


&&

EVENT NUMBER PBZ1200375

$$

JMP

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KPBZ [231101]: Preliminary Local Storm Report

NWUS51 KPBZ 231101
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
701 AM EDT MON APR 23 2012

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

0700 AM SNOW 2 E ACME 40.13N 79.39W
04/23/2012 M4.0 INCH WESTMORELAND PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200374

$$

JMP

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KPBZ [231058]: Preliminary Local Storm Report

NWUS51 KPBZ 231058
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
658 AM EDT MON APR 23 2012

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

0656 AM SNOW DONEGAL 40.11N 79.38W
04/23/2012 M3.0 INCH WESTMORELAND PA PUBLIC


&&

EVENT NUMBER PBZ1200373

$$

JMP

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KPBZ [231055]: Preliminary Local Storm Report

NWUS51 KPBZ 231055
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
654 AM EDT MON APR 23 2012

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

0654 AM SNOW INDIANA 40.62N 79.15W
04/23/2012 M2.0 INCH INDIANA PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200372

$$

JMP

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KPBZ [231054]: Preliminary Local Storm Report

NWUS51 KPBZ 231054
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
654 AM EDT MON APR 23 2012

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

0654 AM SNOW CLYDE 40.45N 79.07W
04/23/2012 M4.0 INCH INDIANA PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200371

$$

JMP

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KPBZ [231052]: Preliminary Local Storm Report

NWUS51 KPBZ 231052
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
652 AM EDT MON APR 23 2012

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

0652 AM SNOW 8 ESE KINGWOOD 39.43N 79.55W
04/23/2012 M5.0 INCH PRESTON WV DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200370

$$

JMP

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KPBZ [231049]: Preliminary Local Storm Report

NWUS51 KPBZ 231049
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
649 AM EDT MON APR 23 2012

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

0649 AM SNOW ALBRIGHT 39.49N 79.64W
04/23/2012 M3.0 INCH PRESTON WV DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200369

$$

JMP

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KPBZ [231047]: Preliminary Local Storm Report

NWUS51 KPBZ 231047
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
647 AM EDT MON APR 23 2012

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

0647 AM SNOW 3 E DAVIS 39.13N 79.41W
04/23/2012 M3.0 INCH TUCKER WV DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200368

$$

JMP

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KPBZ [231044]: Preliminary Local Storm Report

NWUS51 KPBZ 231044
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
644 AM EDT MON APR 23 2012

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

0643 AM SNOW OAKLAND 39.41N 79.41W
04/23/2012 M3.5 INCH GARRETT MD DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200367

$$

JMP

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KPBZ [231043]: Preliminary Local Storm Report

NWUS51 KPBZ 231043
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
643 AM EDT MON APR 23 2012

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

0643 AM SNOW KEYSERS RIDGE 39.69N 79.25W
04/23/2012 M5.0 INCH GARRETT MD DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200366

$$

JMP

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KPBZ [231037]: Preliminary Local Storm Report

NWUS51 KPBZ 231037
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
637 AM EDT MON APR 23 2012

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

0636 AM SNOW MILL RUN 39.95N 79.45W
04/23/2012 M2.0 INCH FAYETTE PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200365

$$

JMP

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KPBZ [231036]: Preliminary Local Storm Report

NWUS51 KPBZ 231036
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
636 AM EDT MON APR 23 2012

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

0635 AM SNOW 3 ESE CHAMPION 40.06N 79.31W
04/23/2012 M3.0 INCH WESTMORELAND PA DEPT OF HIGHWAYS


&&

EVENT NUMBER PBZ1200364

$$

JMP

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KPBZ [231030]: Preliminary Local Storm Report

NWUS51 KPBZ 231030
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
630 AM EDT MON APR 23 2012

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

0629 AM SNOW 2 E GREENSBURG 40.31N 79.51W
04/23/2012 M1.5 INCH WESTMORELAND PA PUBLIC


&&

EVENT NUMBER PBZ1200363

$$

JMP

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KPBZ [231029]: Preliminary Local Storm Report

NWUS51 KPBZ 231029
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
629 AM EDT MON APR 23 2012

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

0628 AM SNOW 1 N WHITNEY 40.27N 79.41W
04/23/2012 M1.5 INCH WESTMORELAND PA PUBLIC


&&

EVENT NUMBER PBZ1200362

$$

JMP

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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 MON APR 23 2012

VALID 261200Z - 011200Z

...DISCUSSION...
00Z ECMWF/GEFS GUIDANCE REMAIN IN AMPLE GENERAL AGREEMENT WITH THE
CONTINUANCE OF A RELATIVELY AMPLIFIED PATTERN MUCH OF THE PERIOD.
DEEP CONVECTIVE POTENTIAL WILL GENERALLY BE TIED TO AN EASTWARD
PROGRESSING UPPER TROUGH DAYS 4-6...WITH A SOUTHERN STREAM SHORTWAVE
TROUGH EXPECTED TO EJECT NORTHEASTWARD FROM THE DESERT SOUTHWEST TO
THE CENTRAL PLAINS/MIDWEST BY DAYS 5/6 FRIDAY/SATURDAY.

IT IS LIKELY THAT AT LEAST SOME SEVERE POTENTIAL SHOULD EXIST ACROSS
PORTIONS OF THE PLAINS TO MO VALLEY/MIDWEST AS THE UPPER TROUGH
APPROACHES THE REGION THE LAST HALF OF THE WEEK. HOWEVER...AN
INITIAL MODEST QUALITY/DEGREE OF MOISTURE RETURN...AND EVENTUAL
POSSIBLE WEAKENING PHASE OF THE UPPER TROUGH OVER THE CENTRAL CONUS
BY THE WEEKEND...PRECLUDE ANY 30 PERCENT SEVERE AREAS AT THIS TIME.

NONETHELESS...CURRENT THINKING BASED ON LATEST GUIDANCE IS THAT AT
LEAST ISOLATED/POSSIBLE SLIGHT RISK-CALIBER SEVERE THREATS COULD
EXIST DAY 4/THURSDAY INTO DAYS 5/6 FRIDAY/SATURDAY. FOR DAY
4/THURSDAY...THIS COULD BE ACROSS PORTIONS OF THE SOUTH-CENTRAL HIGH
PLAINS/PERHAPS ROCKIES FRONT RANGE...INCLUDING A CORRIDOR
ENCOMPASSING THE TX/OK PANHANDLES INTO EASTERN CO/FAR WESTERN KS.
SUBSEQUENT SEVERE POTENTIAL COULD THEN DEVELOP EASTWARD ACROSS THE
CENTRAL PLAINS/LOWER MO VALLEY INTO DAY 5/FRIDAY...WITH THE
DEGREE/LIKELIHOOD OF DEVELOPMENT ALONG THE DRYLINE MORE UNCERTAIN
WITH SOUTHWARD EXTENT INTO OK/TX. BY DAY 6/SATURDAY...A SEVERE RISK
MAY EXTEND INTO PORTIONS OF THE OH VALLEY/MIDDLE MS VALLEY AND
PERHAPS ARKLATEX/MID-SOUTH IN VICINITY OF THE EAST-SOUTHEAST
ADVANCING COLD FRONT...ALTHOUGH SPECIFIC PREDICTABILITY IS MUCH MORE
UNCERTAIN BY THIS TIME FRAME.

..GUYER.. 04/23/2012

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MESO: Mesoscale Discussion 0581

ACUS11 KWNS 230738
SWOMCD
SPC MCD 230737
MEZ000-231130-

MESOSCALE DISCUSSION 0581
NWS STORM PREDICTION CENTER NORMAN OK
0237 AM CDT MON APR 23 2012

AREAS AFFECTED...NRN ME

CONCERNING...FREEZING RAIN

VALID 230737Z - 231130Z

A CHANGEOVER FROM LIGHT SNOW TO FREEZING RAIN IS EXPECTED TO OCCUR
BETWEEN 08-10Z. PRECIPITATION RATES WILL APPROACH 0.10-0.15 INCH/HR
THROUGH 12-15Z BEFORE A TRANSITION TO RAIN OCCURS.

07Z SURFACE ANALYSIS SHOWS PRIMARY CYCLONE OVER NJ WITH AN
ASSOCIATED WARM FRONT EXTENDING ENEWD ACROSS LONG ISLAND SOUND...ERN
CT AND E-CNTRL MA. A CORRIDOR OF ENHANCED PRESSURE FALLS WAS
OBSERVED N OF THE WARM FRONT FROM THE HUDSON VALLEY EWD INTO SWRN
ME...LIKELY DENOTING STRONG LOW TO MID-TROPOSPHERIC WAA ASSOCIATED
WITH EXIT REGION OF 50+ KT LLJ /PER BOX VWP/.

LATEST MODEL GUIDANCE REMAINS CONSISTENT IN SUGGESTING THAT THE
SURFACE LOW WILL CONTINUE TO DEVELOP NNWWD INTO THE LOWER HUDSON
VALLEY THROUGH 12Z WHILE ASSOCIATED WARM CONVEYOR BELT /AND 50-70 KT
SSELY LLJ/ DEVELOPS NWD THROUGH NEW ENGLAND. RECENT SURFACE
OBSERVATIONS AT MILLINOCKET...HOULTON...AND CARIBOU INDICATE EITHER
SNOW OR LIGHT RAIN WITH BOUNDARY LAYER CONDITIONS CHARACTERIZED BY
TEMPERATURES OF 33-34 F AND DEWPOINTS OF 30-32 F.

EXPECT A CHANGEOVER TO FREEZING RAIN BETWEEN 08-10Z WITH AN INCREASE
IN PRECIPITATION RATES AS THE ENHANCED ZONE OF WAA MENTIONED ABOVE
DEVELOPS NWD ACROSS THE DISCUSSION AREA. FREEZING RAIN WILL
CONTINUE THROUGH SUNRISE WITH HOURLY RATES APPROACHING 0.10-0.15
INCH...BEFORE A TRANSITION TO RAIN OCCURS BY LATE MORNING.

..MEAD.. 04/23/2012

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

ATTN...WFO...CAR...GYX...

LAT...LON 45217097 45907028 46747000 47346928 47396817 47016760
46366768 45836816 45046973 44767079 45217097

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 230732
SWODY3
SPC AC 230730

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0230 AM CDT MON APR 23 2012

VALID 251200Z - 261200Z

...MIDWEST/MIDDLE MS VALLEY/OH VALLEY...
NUMERICAL GUIDANCE MAY BE A BIT TOO AGGRESSIVE WITH BOUNDARY LAYER
MOISTENING INTO DAY 3/WEDNESDAY ACROSS THE REGION GIVEN
CURRENT/SHORT-TERM FLOW TRAJECTORIES VIA THE CENTRAL CONUS
ANTICYCLONE. NONETHELESS...MOISTENING WILL OCCUR NEAR A SHARPENING
WARM FRONT/ADJACENT WARM SECTOR AS A PLUME OF STEEP LAPSE RATES
ALOFT ADVECTS EASTWARD TOWARD THE MIDDLE MS VALLEY/TN VALLEY.
SPECIFIC SCENARIO CONFIDENCE IS NOT PARTICULARLY HIGH GIVEN
ANTICIPATED NEBULOUS/LOW AMPLITUDE WEST-NORTHWESTERLY FLOW ALOFT.
BUT AN ASSORTMENT OF NUMERICAL GUIDANCE IS INDICATIVE OF THE
POTENTIAL FOR ONE OR MORE PROGRESSIVE DISTURBANCES ALOFT TO COINCIDE
WITH A RELATIVELY MOIST/POTENTIALLY UNSTABLE AIRMASS IN VICINITY OF
THE AFOREMENTIONED WARM FRONT...AND ALONG/SOUTH OF A
SOUTH-SOUTHEASTWARD MOVING COLD FRONT ACROSS THE UPPER MIDWEST.
OVERALL SCENARIO APPEARS TO WARRANT LOW SEVERE PROBABILITIES FOR AT
LEAST ISOLATED OR CONDITIONAL HAIL/WIND POTENTIAL...PERHAPS EARLY
WEDNESDAY /HAIL/ BUT MORE SO WEDNESDAY AFTERNOON/NIGHT ACROSS THE
REGION.

...FAR SOUTHERN CA...
LATEST NUMERICAL GUIDANCE SUGGESTS THAT A SOUTHERN STREAM CLOSED
TROUGH WILL BECOME MORE PROGRESSIVE AND APPROACH FAR SOUTHERN
CA/NORTHERN BAJA WEDNESDAY NIGHT. SUBSEQUENT OUTLOOKS WILL BETTER
EVALUATE ANY NEED FOR LOW SEVERE PROBABILITIES GIVEN LINGERING
UNCERTAINTIES...BUT POTENTIAL FOR SMALL HAIL/GUSTY WINDS AND
WATERSPOUTS CANNOT CURRENTLY BE RULED OUT FOR COASTAL FAR SOUTHERN
CA/ADJACENT OFFSHORE AREAS.

...PACIFIC NORTHWEST/NORTHERN INTERMOUNTAIN REGION...
HEIGHT FALLS WILL OCCUR ACROSS THE REGION AS AN UPPER TROUGH
AMPLIFIES/DIGS SOUTHEASTWARD OFF THE COAST OF THE PACIFIC NORTHWEST.
SOME HAIL/GUSTY WIND POTENTIAL MAY BE POSSIBLE ACROSS THE REGION
GIVEN INCREASING PRECIPITABLE WATER/VERTICAL SHEAR...AND SUCH
POTENTIAL WILL BE REEXAMINED IN SHORT TERM CONVECTIVE OUTLOOKS.

..GUYER.. 04/23/2012

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 230610
SWODY2
SPC AC 230609

DAY 2 CONVECTIVE OUTLOOK CORR 1
NWS STORM PREDICTION CENTER NORMAN OK
0109 AM CDT MON APR 23 2012

VALID 241200Z - 251200Z

...NO SVR TSTM AREAS FORECAST...

CORRECTED FOR NDFD GRAPHIC

...SYNOPSIS...
AN AMPLIFIED LARGE SCALE PATTERN WILL REMAIN OVER MUCH OF THE
CONUS/CANADA THROUGH TUESDAY. AN UPPER RIDGE OVER THE ROCKIES WILL
BE FLANKED BY A DEEP LONGWAVE TROUGH OVER THE EASTERN PORTIONS OF
THE CONUS/CANADA AND FAR WESTERN ATLANTIC...WHILE DUAL UPPER TROUGHS
SHIFT EASTWARD OVER THE EASTERN PACIFIC AMID SPLIT UPPER FLOW.

...NORTHERN ROCKIES...
ONE OR MORE LOW-AMPLITUDE IMPULSES ARE EXPECTED TO CREST THE ROCKIES
UPPER RIDGE AS THE RIDGE OTHERWISE DAMPENS TO A DEGREE...WITH A
GRADUAL /ALBEIT MODEST/ MOISTENING OF THE AIRMASS ACROSS THE REGION
INTO TUESDAY. THIS SHOULD RESULT IN AN UPSWING OF POSSIBLE TSTMS
ESPECIALLY FROM FAR EASTERN ORE/WA INTO ID/MT. WHILE EARLY DAY
CLOUDS/PRECIPITATION MAY FURTHER HINDER THE DEGREE OF
DESTABILIZATION...STEEP LAPSE RATES AND MODEST CAPE BENEATH MODERATE
WEST-SOUTHWESTERLY FLOW ALOFT MAY BE SUFFICIENT FOR A FEW STRONGER
TSTMS CAPABLE OF HAIL/GUSTY WINDS.

...UPPER MIDWEST/MIDDLE MS VALLEY/OH VALLEY...
AN ELEVATED MIXED LAYER WILL BUILD EASTWARD AND BECOME INCREASINGLY
EXTENSIVE OVER THE NORTHERN/CENTRAL PLAINS AND ADJACENT UPPER
MIDWEST THROUGH TUESDAY. APPRECIABLE MOISTURE RETURN IS UNLIKELY
THROUGH TUESDAY GIVEN PERSISTENCE OF CONTINENTAL NEAR-GULF OF MEXICO
TRAJECTORIES...BUT A DEGREE OF MOISTENING WILL NONETHELESS OCCUR
INTO THE REGION BENEATH THE STRENGTHENING CAP.

IT IS CONCEIVABLE THAT ISOLATED TO SCATTERED TSTMS COULD DEVELOP
TUESDAY AFTERNOON NEAR A SURFACE LOW AND WEAK FRONT/SURFACE TROUGH
ACROSS THE EASTERN DAKOTAS/MN. HOWEVER...A SOMEWHAT MORE CERTAIN
SCENARIO IS FOR ISOLATED TSTMS TO DEVELOP LATE TUESDAY NIGHT ACROSS
THE MIDWEST/OH VALLEY ON THE EASTERN EDGE OF THE CAP IN AREAS
NEAR/NORTHEAST OF A WARM FRONT. IT SHOULD BE NOTED THAT CONSIDERABLE
NUMERICAL GUIDANCE VARIABILITY DOES STILL EXIST /ESPECIALLY 00Z GFS
VS 00Z NAM/12Z ECMWF -- WITH THE LATTER MORE AGGRESSIVE/. BUT EVEN
WITH THIS GUIDANCE VARIABILITY AND A MARGINAL MOISTURE INFLUX ALOFT
LATE TUESDAY...WILL INTRODUCE LOW PROBABILITIES FOR
CONDITIONAL/ISOLATED HAIL POTENTIAL TUESDAY NIGHT IF/WHERE STORMS
OCCUR ACROSS THE MIDWEST/OH VALLEY...GIVEN THE PROXIMITY OF VERY
STEEP LAPSE RATES ALOFT COUPLED WITH A HIGH DEGREE OF SHEAR.

..GUYER.. 04/23/2012

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 230601
SWODY2
SPC AC 230600

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0100 AM CDT MON APR 23 2012

VALID 241200Z - 251200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
AN AMPLIFIED LARGE SCALE PATTERN WILL REMAIN OVER MUCH OF THE
CONUS/CANADA THROUGH TUESDAY. AN UPPER RIDGE OVER THE ROCKIES WILL
BE FLANKED BY A DEEP LONGWAVE TROUGH OVER THE EASTERN PORTIONS OF
THE CONUS/CANADA AND FAR WESTERN ATLANTIC...WHILE DUAL UPPER TROUGHS
SHIFT EASTWARD OVER THE EASTERN PACIFIC AMID SPLIT UPPER FLOW.

...NORTHERN ROCKIES...
ONE OR MORE LOW-AMPLITUDE IMPULSES ARE EXPECTED TO CREST THE ROCKIES
UPPER RIDGE AS THE RIDGE OTHERWISE DAMPENS TO A DEGREE...WITH A
GRADUAL /ALBEIT MODEST/ MOISTENING OF THE AIRMASS ACROSS THE REGION
INTO TUESDAY. THIS SHOULD RESULT IN AN UPSWING OF POSSIBLE TSTMS
ESPECIALLY FROM FAR EASTERN ORE/WA INTO ID/MT. WHILE EARLY DAY
CLOUDS/PRECIPITATION MAY FURTHER HINDER THE DEGREE OF
DESTABILIZATION...STEEP LAPSE RATES AND MODEST CAPE BENEATH MODERATE
WEST-SOUTHWESTERLY FLOW ALOFT MAY BE SUFFICIENT FOR A FEW STRONGER
TSTMS CAPABLE OF HAIL/GUSTY WINDS.

...UPPER MIDWEST/MIDDLE MS VALLEY/OH VALLEY...
AN ELEVATED MIXED LAYER WILL BUILD EASTWARD AND BECOME INCREASINGLY
EXTENSIVE OVER THE NORTHERN/CENTRAL PLAINS AND ADJACENT UPPER
MIDWEST THROUGH TUESDAY. APPRECIABLE MOISTURE RETURN IS UNLIKELY
THROUGH TUESDAY GIVEN PERSISTENCE OF CONTINENTAL NEAR-GULF OF MEXICO
TRAJECTORIES...BUT A DEGREE OF MOISTENING WILL NONETHELESS OCCUR
INTO THE REGION BENEATH THE STRENGTHENING CAP.

IT IS CONCEIVABLE THAT ISOLATED TO SCATTERED TSTMS COULD DEVELOP
TUESDAY AFTERNOON NEAR A SURFACE LOW AND WEAK FRONT/SURFACE TROUGH
ACROSS THE EASTERN DAKOTAS/MN. HOWEVER...A SOMEWHAT MORE CERTAIN
SCENARIO IS FOR ISOLATED TSTMS TO DEVELOP LATE TUESDAY NIGHT ACROSS
THE MIDWEST/OH VALLEY ON THE EASTERN EDGE OF THE CAP IN AREAS
NEAR/NORTHEAST OF A WARM FRONT. IT SHOULD BE NOTED THAT CONSIDERABLE
NUMERICAL GUIDANCE VARIABILITY DOES STILL EXIST /ESPECIALLY 00Z GFS
VS 00Z NAM/12Z ECMWF -- WITH THE LATTER MORE AGGRESSIVE/. BUT EVEN
WITH THIS GUIDANCE VARIABILITY AND A MARGINAL MOISTURE INFLUX ALOFT
LATE TUESDAY...WILL INTRODUCE LOW PROBABILITIES FOR
CONDITIONAL/ISOLATED HAIL POTENTIAL TUESDAY NIGHT IF/WHERE STORMS
OCCUR ACROSS THE MIDWEST/OH VALLEY...GIVEN THE PROXIMITY OF VERY
STEEP LAPSE RATES ALOFT COUPLED WITH A HIGH DEGREE OF SHEAR.

..GUYER.. 04/23/2012

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 230547
SWODY1
SPC AC 230545

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1245 AM CDT MON APR 23 2012

VALID 231200Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
HIGHLY AMPLIFIED UPPER FLOW PATTERN TO CONTINUE ACROSS THE U.S. THIS
PERIOD...WITH THE LARGE ERN U.S. UPPER TROUGH PROGGED TO MAKE VERY
SLOW EWD PROGRESS AS THE EMBEDDED UPPER LOW SHIFTS NWD INTO/ACROSS
THE LOWER GREAT LAKES REGION WITH TIME. MEANWHILE FARTHER W...A
STRONG UPPER RIDGE OVER THE ROCKIES WILL LIKEWISE MAKE LIMITED/SLOW
EWD PROGRESS...AS AN UPPER LOW OVER THE ERN PACIFIC SHIFTS SWD --
REMAINING OFFSHORE THROUGH THE PERIOD.

AT THE SURFACE...A DEEP/OCCLUDING LOW INVOF NY CITY AT THE START OF
THE PERIOD IS FORECAST TO SHIFT STEADILY NWWD...REACHING SOUTHERN
ONTARIO THROUGH THE LATTER STAGES OF THE PERIOD. WITH THE
ASSOCIATED FRONT OFFSHORE PRIOR TO THE START OF THE PERIOD...SEVERE
WEATHER IS NOT EXPECTED WITH THIS SYSTEM.

FARTHER W...A MUCH WEAKER SURFACE PATTERN WILL PREVAIL AS THE LARGE
UPPER RIDGE DOMINATES.

...PAC NW VICINITY...
ENHANCED FLOW ALOFT WILL CONTINUE AT THE INTERFACE BETWEEN THE ERN
PACIFIC UPPER TROUGH/LOW AND THE ROCKIES RIDGE. THIS COMBINED WITH
MODEST LOW-LEVEL MOISTURE AND DIURNAL HEATING SHOULD WILL RESULT IN
THE DEVELOPMENT OF 500 TO 1000 J/KG MIXED-LAYER CAPE ACROSS THIS
REGION...AND THUS AN ENVIRONMENT SUPPORTIVE OF THUNDERSTORMS AND
POSSIBLE SEVERE POTENTIAL.

A LIMITING FACTOR WITH RESPECT TO CONVECTIVE INITIATION/COVERAGE
REMAINS THE GENERAL INFLUENCE OF THE LARGE-SCALE RIDGE. HOWEVER...A
WEAK/LEAD IMPULSE IS FORECAST TO SHIFT NNEWD ACROSS THE CA AND THE
GREAT BASIN THROUGH THE PERIOD...POSSIBLY PROVIDING AMPLE ASCENT
WITHIN AN OTHERWISE GENERALLY SUBSIDENT REGIME TO SUPPORT SCATTERED
TO ISOLATED SHOWER/THUNDERSTORM INITIATION.

GIVEN THE AFOREMENTIONED KINEMATIC/THERMODYNAMIC
ENVIRONMENT...LIMITED THREAT FOR MARGINAL SEVERE WEATHER REMAINS
APPARENT -- WITH A FEW AFTERNOON CELLS POSSIBLY STRENGTHENING TO
SEVERE LEVELS. THUS...WILL MAINTAIN 5% PROBABILITY FOR SEVERE
HAIL/WIND IN A ZONE FROM NRN CA/OREGON NEWD INTO NRN ID/WRN MT --
PRIMARILY FOR AFTERNOON AND EARLY EVENING STORMS.

..GOSS.. 04/23/2012

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KPDT [230507]: Preliminary Local Storm Report

NWUS56 KPDT 230507
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1007 PM PDT SUN APR 22 2012

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

0930 PM HAIL 2 SE MILTON-FREEWATER 45.92N 118.37W
04/22/2012 E0.25 INCH UMATILLA OR TRAINED SPOTTER

OBSERVER REPORTED PEA SIZED HAIL AND A TEMPERATURE OF 65
DEGREES.


&&

$$

RQB

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