KSEW [240143]: Preliminary Local Storm Report

NWUS56 KSEW 240143
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
543 PM PST WED FEB 23 2011

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

0525 PM SNOW 1 NNW PORT TOWNSEND 48.14N 122.79W
02/23/2011 M5.0 INCH JEFFERSON WA TRAINED SPOTTER

5.2 INCHES IN 3 HOURS.

0539 PM SNOW S GREENBANK 48.10N 122.57W
02/23/2011 M4.0 INCH ISLAND WA TRAINED SPOTTER

4.25 INCHES IN THE LAST 3.5 HOURS.

&&

$$

CERNIGLIA

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KLSX [240128]: Preliminary Local Storm Report

NWUS53 KLSX 240128
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
727 PM CST WED FEB 23 2011

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

0725 PM HAIL LITCHFIELD 39.18N 89.66W
02/23/2011 E0.25 INCH MONTGOMERY IL TRAINED SPOTTER

&&

$$

MILLER

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KPQR [240124]: Preliminary Local Storm Report

NWUS56 KPQR 240124
LSRPQR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PORTLAND OR
524 PM PST WED FEB 23 2011

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

1200 PM HEAVY SNOW AMITY 45.12N 123.20W
02/23/2011 M5.0 INCH YAMHILL OR PUBLIC

SNOWFALL OVERNIGHT AND THIS MORNING. ELEVATION 900 FT.

&&

$$

DONOFRIO

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KOTX [240117]: Preliminary Local Storm Report

NWUS56 KOTX 240117
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
517 PM PST WED FEB 23 2011

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

0600 AM HEAVY SNOW 1 E MOSCOW 46.73N 116.97W
02/23/2011 M4.1 INCH LATAH ID TRAINED SPOTTER

COCORAHS ID-LT-7

0400 PM SNOW 8 E CHELAN 47.86N 119.86W
02/23/2011 E4.0 INCH DOUGLAS WA TRAINED SPOTTER

0400 PM SNOW 1 W PULLMAN 46.73N 117.19W
02/23/2011 E4.0 INCH WHITMAN WA TRAINED SPOTTER

STORM TOTAL 7 INCHES.

0430 PM SNOW WNW COLVILLE 48.54N 117.90W
02/23/2011 E5.0 INCH STEVENS WA TRAINED SPOTTER

0430 PM SNOW 1 SW BONNERS FERRY 48.68N 116.33W
02/23/2011 E5.5 INCH BOUNDARY ID TRAINED SPOTTER

STORM TOTAL 20.5 INCHES. SNOW FALL ESTIMATED.

0500 PM SNOW 6 WNW DIAMOND LAKE 48.17N 117.31W
02/23/2011 M7.0 INCH PEND OREILLE WA TRAINED SPOTTER

7 INCHES NEW IN PAST 3 HOURS. STILL SNOWING.

&&

$$

MAT

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KILX [240106]: Preliminary Local Storm Report

NWUS53 KILX 240106
LSRILX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
706 PM CST WED FEB 23 2011

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

0535 PM HAIL 1 SW JEROME 39.76N 89.69W
02/23/2011 M0.25 INCH SANGAMON IL MESONET

&&

$$

25

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KPDT [240103]: Preliminary Local Storm Report

NWUS56 KPDT 240103
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
503 PM PST WED FEB 23 2011

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

0303 PM SNOW TOLLGATE 45.78N 118.11W
02/23/2011 E3.0 INCH UMATILLA OR DEPT OF HIGHWAYS

ODOT SNOWPLOW CREW REPORTED 3 INCHES OF NEW SNOW IN THE
LAST 5 HOURS ON HIGHWAY 204 IN THE TOLLGATE AREA.
TEMPERATURE IS 20 DEGREES.

&&

$$

GP

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KSEW [240058]: Preliminary Local Storm Report

NWUS56 KSEW 240058
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
458 PM PST WED FEB 23 2011

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

0457 PM SNOW 4 E MOUNT VERNON 48.42N 122.22W
02/23/2011 M8.0 INCH SKAGIT WA TRAINED SPOTTER

2 INCHES OF SNOW IN 45 MINUTES AND STILL SNOWING HARD. 8
INCHES ON THE GROUND.

&&

$$

CERNIGLIA

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KSEW [240044]: Preliminary Local Storm Report

NWUS56 KSEW 240044
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
444 PM PST WED FEB 23 2011

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

1201 PM SNOW 4 NNE LA CONNER 48.45N 122.47W
02/23/2011 M6.0 INCH SKAGIT WA TRAINED SPOTTER

6 INCH STORM TOTAL NOON TO NOON.

0200 PM SNOW 3 WNW SEKIU 48.28N 124.37W
02/23/2011 M4.0 INCH CLALLAM WA TRAINED SPOTTER

4 INCHES NEW.

0200 PM SNOW 1 ESE COVILLE 48.12N 123.60W
02/23/2011 M5.0 INCH CLALLAM WA TRAINED SPOTTER

4 INCHES IN 2 HOURS. 5 INCHES ON GROUND.

0319 PM SNOW 4 W SEQUIM 48.08N 123.20W
02/23/2011 M5.0 INCH CLALLAM WA TRAINED SPOTTER

5 INCHES FELL BETWEEN 1 PM AND 315 PM.

0400 PM SNOW 1 ENE ELWHA 48.06N 123.57W
02/23/2011 M4.0 INCH CLALLAM WA TRAINED SPOTTER

4 INCHES ON GROUND SINCE NOON.

0417 PM SNOW 1 ESE COVILLE 48.12N 123.60W
02/23/2011 M6.0 INCH CLALLAM WA TRAINED SPOTTER

1 INCH NEW LAST HOUR, 6 INCHES ON THE GROUND.

0427 PM SNOW 3 WSW PORT TOWNSEND 48.10N 122.84W
02/23/2011 M4.0 INCH JEFFERSON WA TRAINED SPOTTER

4 INCHES SINCE 3 PM.

&&

$$

CERNIGLIA

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KILX [232356]: Preliminary Local Storm Report

NWUS53 KILX 232356
LSRILX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
556 PM CST WED FEB 23 2011

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

0545 PM HAIL ROCHESTER 39.75N 89.54W
02/23/2011 M0.25 INCH SANGAMON IL NWS EMPLOYEE

&&

$$

25

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KBIS [232356]: Preliminary Local Storm Report

NWUS53 KBIS 232356
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
556 PM CST WED FEB 23 2011

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

0555 PM SNOW SHERWOOD 48.96N 101.63W
02/23/2011 M1.0 INCH RENVILLE ND BROADCAST MEDIA

&&

$$

LHUBER

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KDVN [232347]: Preliminary Local Storm Report

NWUS53 KDVN 232347
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
547 PM CST WED FEB 23 2011

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

0528 PM SLEET 1 W BETTENDORF 41.56N 90.49W
02/23/2011 U0.00 INCH SCOTT IA TRAINED SPOTTER

SLEET FALLING WITH THUNDER BEING HEARD.

&&

$$

GROSS

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KDVN [232334]: Preliminary Local Storm Report

NWUS53 KDVN 232334
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
534 PM CST WED FEB 23 2011

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

0453 PM HAIL DAVENPORT 41.56N 90.60W
02/23/2011 E0.25 INCH SCOTT IA PUBLIC

BRIEF HAIL MUCH SMALLER THAN A PENNY

0500 PM HAIL BETTENDORF 41.56N 90.48W
02/23/2011 E0.25 INCH SCOTT IA NWS EMPLOYEE

0504 PM SLEET 1 W BETTENDORF 41.56N 90.49W
02/23/2011 U0.00 INCH SCOTT IA TRAINED SPOTTER

LASTED APPROX 10 MINUTES - GROUND IS NEARLY WHITE

&&

$$

TAS

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KDVN [232326]: Preliminary Local Storm Report

NWUS53 KDVN 232326
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
526 PM CST WED FEB 23 2011

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

0524 PM SLEET 2 NE MUSCATINE 41.43N 91.05W
02/23/2011 U0.00 INCH MUSCATINE IA TRAINED SPOTTER

SLEET CURRENTLY FALLING MIXED IN WITH RAIN.

&&

$$

GROSS

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KLSX [232326]: Preliminary Local Storm Report

NWUS53 KLSX 232326
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
526 PM CST WED FEB 23 2011

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

0515 PM HAIL NEBO 39.44N 90.79W
02/23/2011 E0.25 INCH PIKE IL TRAINED SPOTTER

&&

$$

MILLER

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KBIS [232319]: Preliminary Local Storm Report

NWUS53 KBIS 232319
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
519 PM CST WED FEB 23 2011

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

0500 PM SNOW 20 S WATFORD CITY 47.51N 103.28W
02/23/2011 M1.0 INCH MCKENZIE ND CO-OP OBSERVER

&&

$$

LHUBER

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KLSX [232318]: Preliminary Local Storm Report

NWUS53 KLSX 232318
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
518 PM CST WED FEB 23 2011

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

0517 PM HAIL ROODHOUSE 39.48N 90.37W
02/23/2011 M0.25 INCH GREENE IL TRAINED SPOTTER

PEA SIZE HAIL AT THE NORTH EDGE OF ROODHOUSE AT THE
COUNTY LINE

&&

$$

KANOFSKY

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KPDT [232307]: Preliminary Local Storm Report

NWUS56 KPDT 232307
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
307 PM PST WED FEB 23 2011

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

1200 PM SNOW 2 NNW SKI BLUEWOOD 46.12N 117.85W
02/23/2011 M7.0 INCH COLUMBIA WA MESONET

24 HOUR AMOUNT ENDING NOON FROM TOUCHET SNOTEL. ELEVATION
5530 FEET.

&&

$$

JBONK

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KLSX [232301]: Preliminary Local Storm Report

NWUS53 KLSX 232301
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
501 PM CST WED FEB 23 2011

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

0445 PM HAIL BOWLING GREEN 39.34N 91.20W
02/23/2011 E0.25 INCH PIKE MO CO-OP OBSERVER

ENOUGH PEA SIZED HAIL...OR A LITTLE SMALLER...TO
PARTIALLY COVER THE GROUND

&&

$$

MILLER

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KDLH [232253]: Preliminary Local Storm Report

NWUS53 KDLH 232253
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
452 PM CST WED FEB 23 2011

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

0452 PM SNOW 15 N GRAND RAPIDS 47.45N 93.52W
02/23/2011 M2.0 INCH ITASCA MN TRAINED SPOTTER

&&

$$

SCW

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KDLH [232247]: Preliminary Local Storm Report

NWUS53 KDLH 232247
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
447 PM CST WED FEB 23 2011

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

0446 PM SNOW COTTON 47.17N 92.47W
02/23/2011 M2.1 INCH ST. LOUIS MN CO-OP OBSERVER

&&

$$

GRANING

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KDLH [232231]: Preliminary Local Storm Report

NWUS53 KDLH 232231
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
431 PM CST WED FEB 23 2011

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

0430 PM SNOW 3 E ORR 48.06N 92.76W
02/23/2011 M2.6 INCH ST. LOUIS MN TRAINED SPOTTER

0430 PM SNOW LUTSEN 47.64N 90.71W
02/23/2011 M1.2 INCH COOK MN TRAINED SPOTTER

&&

$$

SCW

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KSEW [232156]: Preliminary Local Storm Report

NWUS56 KSEW 232156
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
156 PM PST WED FEB 23 2011

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

1146 AM SNOW 3 WNW SEKIU 48.28N 124.37W
02/23/2011 M2.0 INCH CLALLAM WA TRAINED SPOTTER

2 INCHES ON GROUND WITH HEAVY SNOW NOW. 30 DEGREES, GUSTY
EAST WIND.

1238 PM SNOW 4 NNE LA CONNER 48.45N 122.47W
02/23/2011 M6.0 INCH SKAGIT WA TRAINED SPOTTER

6 INCHES IN THE LAST 12 HOURS.

1238 PM SNOW N COVILLE 48.13N 123.63W
02/23/2011 M3.0 INCH CLALLAM WA TRAINED SPOTTER

STILL SNOWING HEAVILY.

0155 PM SNOW 4 W SEQUIM 48.08N 123.20W
02/23/2011 M2.0 INCH CLALLAM WA TRAINED SPOTTER

2 INCHES IN THE LAST HOUR.

&&

$$

CERNIGLIA

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KLSX [232119]: Preliminary Local Storm Report

NWUS53 KLSX 232119
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
318 PM CST WED FEB 23 2011

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

0310 PM HAIL W LOUISIANA 39.44N 91.06W
02/23/2011 E0.25 INCH PIKE MO TRAINED SPOTTER

SPOTTER WAS JUST WEST OF LOUISIANA ON A COUNTRY ROAD
AND REPORTED PEA SIZED OR A LITTLE SMALLER HAIL

&&

$$

MILLER

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KDLH [232118]: Preliminary Local Storm Report...corrected

NWUS53 KDLH 232118
LSRDLH

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DULUTH MN
318 PM CST WED FEB 23 2011

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

1240 PM SNOW 7 SE GRAND RAPIDS 47.16N 93.42W
02/23/2011 M2.2 INCH ITASCA MN TRAINED SPOTTER

0318 PM SNOW NASHWAUK 47.38N 93.17W
02/23/2011 M2.0 INCH ITASCA MN TRAINED SPOTTER

&&

$$

GRANING

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KTFX [232115]: Preliminary Local Storm Report

NWUS55 KTFX 232115
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
215 PM MST WED FEB 23 2011

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

0700 AM SNOW 3 ENE DUTTON 47.86N 111.65W
02/23/2011 M1.5 INCH TETON MT PUBLIC

1.5 INCHES OF NEW SNOW IN THE PAST 24 HOURS.

&&

$$

BRUSDA

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KTFX [232112]: Preliminary Local Storm Report

NWUS55 KTFX 232112
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
212 PM MST WED FEB 23 2011

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

1100 AM SNOW 3 WNW EAST HELENA 46.61N 111.96W
02/23/2011 M1.0 INCH LEWIS AND CLARK MT ASOS

1 INCH OF NEW SNOW AT THE HELENA REGIONAL AIRPORT THIS
MORNING.

&&

$$

BRUSDA

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KTFX [232111]: Preliminary Local Storm Report

NWUS55 KTFX 232111
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
211 PM MST WED FEB 23 2011

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

0700 AM SNOW 3 NNW GREAT FALLS 47.54N 111.32W
02/23/2011 M2.2 INCH CASCADE MT PUBLIC

2.2 INCHES OF NEW SNOW IN THE PAST 24 HOURS.

&&

$$

BRUSDA

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KTFX [232109]: Preliminary Local Storm Report

NWUS55 KTFX 232109
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
209 PM MST WED FEB 23 2011

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

0800 AM SNOW FORT BENTON 47.83N 110.66W
02/23/2011 M1.2 INCH CHOUTEAU MT CO-OP OBSERVER

1.2 INCHES OF NEW SNOW IN THE PAST 24 HOURS.

&&

$$

BRUSDA

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KTFX [232041]: Preliminary Local Storm Report

NWUS55 KTFX 232041
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
141 PM MST WED FEB 23 2011

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

0715 AM SNOW 1 SSE WEST YELLOWSTONE 44.65N 111.10W
02/23/2011 M6.0 INCH GALLATIN MT CO-OP OBSERVER

6 INCHES OF NEW SNOW IN THE PAST 24 HOURS.

&&

$$

BRUSDA

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KTFX [232009]: Preliminary Local Storm Report

NWUS55 KTFX 232009
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
109 PM MST WED FEB 23 2011

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

0600 AM SNOW 5 S NEIHART 46.86N 110.74W
02/23/2011 E6.0 INCH CASCADE MT PUBLIC

ESTIMATED 6 INCHES OF NEW SNOW OVERNIGHT. LOCATION IS
SHOWDOWN SKI AREA.

&&

$$

BRUSDA

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KTFX [232007]: Preliminary Local Storm Report

NWUS55 KTFX 232007
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
107 PM MST WED FEB 23 2011

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

1230 PM SNOW GREAT FALLS 47.50N 111.29W
02/23/2011 E4.5 INCH CASCADE MT TRAINED SPOTTER

ESTIMATED ABOUT 4.5 INCHES OF NEW SNOW IN GREAT FALLS
SINCE TUESDAY EVENING.

&&

$$

BRUSDA

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KTFX [232006]: Preliminary Local Storm Report

NWUS55 KTFX 232006
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
106 PM MST WED FEB 23 2011

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

1100 AM SNOW 5 SW GREAT FALLS 47.46N 111.38W
02/23/2011 M4.0 INCH CASCADE MT OFFICIAL NWS OBS

4 INCHES OF NEW SNOW SINCE TUESDAY EVENING AT THE NWS
OFFICE IN GREAT FALLS.

&&

$$

BRUSDA

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 231958
SWODY2
SPC AC 231957

DAY 2 CONVECTIVE OUTLOOK CORR 1
NWS STORM PREDICTION CENTER NORMAN OK
0157 PM CST WED FEB 23 2011

VALID 241200Z - 251200Z

...THERE IS A MDT RISK OF SVR TSTMS LATE THU AFTN AND EVE ACROSS
MUCH OF SOUTHERN AND EASTERN ARKANSAS...PARTS OF NORTHERN
MISSISSIPPI AND WESTERN TENNESSEE...

...THERE IS A SLGT RISK OF SVR TSTMS SURROUNDING THE MODERATE RISK
AREA...FROM PARTS OF THE SOUTHERN PLAINS THRU THE LOWER OH AND TN
VALLEYS...

CORRECTED A TIME REFERENCE OF 12Z THURSDAY TO 12Z FRIDAY IN THE
SYNOPSIS

...SYNOPSIS...
MODELS SUGGEST THAT MID/UPPER FLOW WILL REMAIN BROADLY CONFLUENT
DOWNSTREAM OF PROMINENT EASTERN PACIFIC BLOCKING THROUGH MUCH OF
NORTH AMERICA DURING THIS FORECAST PERIOD. A STRONG JET APPEARS
LIKELY TO ROUND THE CREST OF A STRENGTHENING HIGH CENTER NEAR THE
GULF OF ALASKA...WITH A RIDGE AXIS BUILDING NORTHEASTWARD INTO
WESTERN CANADA. AS THIS OCCURS...A SIGNIFICANT SHORT WAVE TROUGH IS
PROGGED TO CONTINUE SLOWLY DIGGING SOUTHWARD NEAR THE NORTHERN
PACIFIC COAST. THIS WILL CONTRIBUTE TO THE NORTHEASTWARD
ACCELERATION OF A WEAKENING CIRCULATION CENTER NOW TURNING INLAND
ACROSS NORTHERN BAJA.

DESPITE THE DEAMPLIFICATION OF THIS LATTER FEATURE...GUIDANCE
INDICATES THAT FLOW FIELDS WILL INTENSIFY TO ITS SOUTH AND EAST...AS
IT ACCELERATES ACROSS THE SOUTHERN ROCKIES...INTO AND THROUGH THE
CREST OF A BROAD UPPER RIDGE OVER THE LOWER OHIO VALLEY BY 12Z
FRIDAY. LARGE-SCALE FORCING IS PROGGED TO SUPPORT FAIRLY
SIGNIFICANT SURFACE CYCLOGENESIS FROM THE OZARK PLATEAU THROUGH THE
OHIO VALLEY LATE THURSDAY AND THURSDAY NIGHT. WITH A RETURN FLOW
ALREADY DEVELOPING OFF AN INCREASING MOIST BOUNDARY LAYER OVER THE
WESTERN GULF OF MEXICO...THIS PROBABLY WILL BE ACCOMPANIED BY
CONSIDERABLE THUNDERSTORM ACTIVITY...INCLUDING THE RISK FOR SEVERE
STORMS. BY THURSDAY EVENING...IT APPEARS THAT THERE WILL BE A
WINDOW OF OPPORTUNITY FOR THE DEVELOPMENT OF CONDITIONS FAVORABLE
FOR ONE OR TWO STRONG TORNADOES...AND STRONG DAMAGING
WINDS...PARTICULARLY ACROSS PARTS OF SOUTHERN AND EASTERN ARKANSAS
INTO PARTS OF NORTHERN MISSISSIPPI AND WESTERN TENNESSEE.

...SOUTHERN PLAINS INTO THE SOUTHERN APPALACHIANS...
LAPSE RATES IN THE WARM SECTOR OF THE DEVELOPING SURFACE CYCLONE MAY
NOT BECOME PARTICULARLY STEEP THURSDAY...AND UNCERTAINTY EXISTS
CONCERNING THE POTENTIAL STABILIZING INFLUENCE OF EARLY DAY
CONVECTION AND PRECIPITATION...PARTICULARLY NORTHEAST OF THE OZARK
PLATEAU...AS WELL AS PORTIONS OF THE SOUTHERN PLAINS.
HOWEVER...NORTHWARD MOISTURE RETURN /INCLUDING INCREASING
PRECIPITABLE WATER UP TO 1.5 INCHES/ OFF THE WESTERN GULF SHOULD
COMPENSATE SOMEWHAT...CONTRIBUTING TO AT LEAST WEAK CAPE. GIVEN MID
60S TO NEAR 70F DEW POINTS CURRENTLY PRESENT FROM THE WESTERN GULF
INTO SOUTHERN TEXAS...CURRENT MODEL PROGS MAY BE A BIT LOW ON
BOUNDARY LAYER MOISTURE RETURN INTO THE LOWER MISSISSIPPI VALLEY AND
OZARK PLATEAU BY LATE THURSDAY AFTERNOON AND EVENING.

GIVEN BOUNDARY LAYER DESTABILIZATION AND INCREASINGLY DIFLUENT/
DIVERGENT UPPER FLOW WITH THE APPROACHING MID-LEVEL PERTURBATION
...WHICH IS PROGGED TO TAKE ON AN INCREASING NEGATIVE TILT
ORIENTATION...CONDITIONS MAY BECOME FAVORABLE FOR DISCRETE STORM
DEVELOPMENT ACROSS SOUTHERN AND EASTERN ARKANSAS DURING THE 21-23Z
TIME FRAME. COINCIDING WITH STRENGTHENING OF A SOUTHERLY 850 MB JET
IN EXCESS OF 50 KTS...UP TO 70 KT OR SO DURING THE EVENING
HOURS...AND THE EVOLUTION OF LARGE CLOCKWISE CURVED LOW-LEVEL
HODOGRAPHS BENEATH/NEAR A 90-100 KT 500 MB JET... POTENTIAL EXISTS
FOR SUPERCELLS CAPABLE OF PRODUCING STRONG TORNADOES.

ANY SUCH ACTIVITY IS EXPECTED TO FORM NEAR OR IN ADVANCE OF A
FRONTAL OR PRE-FRONTAL SQUALL LINE...WHICH APPEARS MORE CERTAIN TO
EVOLVE...BEFORE ADVANCING EASTWARD ACROSS UPPER PORTIONS OF THE
LOWER MISSISSIPPI VALLEY INTO THE TENNESSEE VALLEY THURSDAY NIGHT.
POTENTIAL FOR STRONG TORNADOES MAY PERSIST THROUGH THE 03-05Z TIME
FRAME ACROSS PARTS OF NORTHERN MISSISSIPPI AND WESTERN
TENNESSEE...WHILE DAMAGING WIND POTENTIAL CONTINUES DEEPER INTO THE
NIGHT TOWARD THE SOUTHERN APPALACHIANS.

..KERR.. 02/23/2011

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KPDT [231952]: Preliminary Local Storm Report

NWUS56 KPDT 231952
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1152 AM PST WED FEB 23 2011

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

0600 AM SNOW 8 SE JOSEPH 45.27N 117.11W
02/23/2011 U4.0 INCH WALLOWA OR AMATEUR RADIO

COLLECTED FROM MORNING HAM WEATHER NET. ELEVATION 5500
FEET.

0630 AM HEAVY SNOW CONDON 45.24N 120.18W
02/23/2011 M5.5 INCH GILLIAM OR CO-OP OBSERVER

CO-OP 24 HOUR SNOW MEASUREMENT. ELEVATION 2840 FEET.

0800 AM SNOW CLE ELUM 47.19N 120.93W
02/23/2011 M7.0 INCH KITTITAS WA CO-OP OBSERVER

24 HOUR CO-OP SNOW MEASUREMENT. START TIME UNKNOWN.
ELEVATION 1920 FEET.

0950 AM HEAVY SNOW NE EASTON 47.24N 121.18W
02/23/2011 M18.0 INCH KITTITAS WA CO-OP OBSERVER

COOP MEASUREMENT COVERING THE LAST 24 HOURS. START TIME
UNKNOWN. ELEVATION 2170 FEET.

&&

$$

JBONK

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KSEW [231934]: Preliminary Local Storm Report

NWUS56 KSEW 231934
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1134 AM PST WED FEB 23 2011

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

0955 AM SNOW 6 W CAMANO 48.18N 122.65W
02/23/2011 M2.8 INCH ISLAND WA TRAINED SPOTTER

2.8 INCHES, STILL MODERATE SNOW.

1100 AM SNOW 5 WSW PUYALLUP 47.17N 122.38W
02/23/2011 M1.1 INCH PIERCE WA TRAINED SPOTTER

1.1 INCHES NEW SNOW.

1100 AM SNOW 2 WNW ANACORTES 48.50N 122.66W
02/23/2011 M7.0 INCH SKAGIT WA TRAINED SPOTTER

2.5 INCHES 8-11 AM. 7 INCHES ON GROUND SINCE LAST
TUESDAY.

1122 AM SNOW 2 ENE FORKS 47.96N 124.35W
02/23/2011 M4.0 INCH CLALLAM WA TRAINED SPOTTER

4 INCHES OF SNOW IN JUST OVER AN HOUR.

1122 AM SNOW 3 W OAK HARBOR 48.31N 122.68W
02/23/2011 M9.0 INCH ISLAND WA TRAINED SPOTTER

9 INCHES OF SNOW FROM 5 AM-1030 AM.

&&

$$

CERNIGLIA

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231923
SWODY1
SPC AC 231921

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0121 PM CST WED FEB 23 2011

VALID 232000Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...20Z OUTLOOK UPDATE...
LATEST MODEL AND OBSERVATIONAL DATA PROVIDE CONTINUED SUPPORT FOR
EARLIER FORECAST REASONING. ASIDE FROM SOME MINOR SHIFTING OF THE
CATEGORICAL /10 PERCENT/ THUNDER LINE...THERE ARE NO CHANGES TO THE
PRIOR OUTLOOK.

..KERR.. 02/23/2011

.PREV DISCUSSION... /ISSUED 1006 AM CST WED FEB 23 2011/

...SRN PLAINS...
AS HEIGHTS FALL PAC NW WITH COLD TROUGHING DEVELOPING SWD FROM
BC...THE UPPER LOW W OF BAJA HAS MADE THE EWD TURN ABOUT AS
EXPECTED. AT THE END OF FORECAST PERIOD...12Z THU...MODELS ARE IN
RELATIVELY CLOSE AGREEMENT BRINGING THE OPEN TROUGH ACROSS SRN
ROCKIES WITH THE ASSOCIATED LARGE SCALE ASCENT AND ACCOMPANYING JET
MAX ENTERING THE SRN PLAINS.

LEE LOW SRN PLAINS BECOMES BETTER ORGANIZED BY THIS EVENING AND
SHIFTS EWD INTO SWRN OK THU AM. DEVELOPING FRONTAL BAND WILL EXTEND
ENEWD FROM SURFACE LOW ACROSS OK AND ALONG MO/AR BORDER...SETTING
THE STAGE FOR AN ACTIVE SEVERE WEATHER DAY ON DY2.

MOIST GULF AIR CONTINUES TO FLOW NWD ACROSS SRN PLAINS THRU THE
FORECAST PERIOD...HOWEVER ANY ACTIVE CONVECTIVE DEVELOPMENT WILL BE
ELEVATED AND PRIMARILY OVERNIGHT WHEN LARGE SCALE SUPPORT RAMPS UP
WITH APPROACH OF S/WV TROUGH.

STRENGTHENING SWLY LLJ AND MOISTURE INFLOW AHEAD OF APPROACHING UPR
IMPULSE SHOULD SUPPORT INCREASING COVERAGE OF TSTMS TONIGHT THROUGH
EARLY THU ALONG AND TO THE N OF DEVELOPING FRONTAL ZONE FROM
CNTRL/ERN OK INTO NRN AR/SRN MO. PRESENCE OF RELATIVELY STEEP LAPSE
RATES AT MID LVLS SUGGEST THAT SUFFICIENT ELEVATED CAPE MAY DEVELOP
AOA 1250 J PER KG/ TO SUPPORT SVR HAIL OVER PARTS OF OK...NW AR...SE
KS AND PERHAPS FAR SW MO MOSTLY AFTER 06Z.

LATER TONIGHT/EARLY THU IN NW TX AS LEADING EDGE OF ASCENT WITH BAJA
TROUGH REACHES WRN EDGE OF PW AXIS AND OVERCOMES CAP A FEW STG
THUNDERSTORMS COULD DEVELOP. GIVEN STRENGTH OF WIND FIELD IN THIS
REGION...AND DEGREE OF BUOYANCY /MUCAPE TO 1000 J PER KG/ ...A
THREAT WILL EXIST FOR ISOLD SVR HAIL/LOCALLY DMGG WIND TOWARD 12Z
THU.

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KPDT [231918]: Preliminary Local Storm Report

NWUS56 KPDT 231918
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1118 AM PST WED FEB 23 2011

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

0500 AM SNOW 4 N BINGHAM SPRINGS 45.79N 118.22W
02/23/2011 M5.0 INCH UMATILLA OR TRAINED SPOTTER

5 INCHES SNOW LAST 24 HOURS.

&&

$$

MVESCIO

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KMSO [231900]: Preliminary Local Storm Report...summary

NWUS55 KMSO 231900
LSRMSO

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MISSOULA MT
1200 PM MST WED FEB 23 2011

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

0613 AM HEAVY SNOW TROY 48.46N 115.89W
02/22/2011 M6.6 INCH LINCOLN MT TRAINED SPOTTER

DELAYED REPORT.

0700 AM HEAVY SNOW TROY 48.46N 115.89W
02/22/2011 E6.0 INCH LINCOLN MT UNKNOWN

0843 AM HEAVY SNOW NE ESSEX 48.28N 113.61W
02/22/2011 M9.0 INCH FLATHEAD MT TRAINED SPOTTER

SNOWFALL WAS SINCE 10PM LAST NIGHT, SNOWFALL RATE AT TIME
OF CALL 1 INCH PER HOUR.

0843 AM BLIZZARD GRANGEVILLE 45.93N 116.12W
02/22/2011 IDAHO ID COUNTY OFFICIAL

SNOW AND STRONG WINDS REPORTED, VISIBILITY OF 300-500
FEET. GRANGEVILLE SCHOOLS WERE CLOSED. CARS WERE SLIDING
OFF THE ROADS.

0947 AM HEAVY SNOW 5 SE YAAK 48.78N 115.63W
02/22/2011 M8.0 INCH LINCOLN MT TRAINED SPOTTER

1002 AM HEAVY SNOW LIBBY 48.39N 115.56W
02/22/2011 E5.0 INCH LINCOLN MT FIRE DEPT/RESCUE

LIBBY DISPATCH REPORTS OF ACCIDENTS ACROSS THE TOWN.

0208 PM HEAVY SNOW 9 NNE YAAK 48.95N 115.63W
02/22/2011 M7.0 INCH LINCOLN MT CO-OP OBSERVER

24 HOUR TOTAL. DELAYED REPORT.

0225 PM BLIZZARD 2 SW CLEARWATER 46.00N 115.92W
02/22/2011 IDAHO ID TRAINED SPOTTER

42 MPH WINDS WITH HEAVY SNOW FALLING PRODUCING BLIZZARD
LIKE CONDITIONS

0225 PM HEAVY SNOW PIERCE 46.49N 115.80W
02/22/2011 M8.0 INCH CLEARWATER ID COUNTY OFFICIAL

REPORTED AT THE CITY HALL.

0225 PM HEAVY SNOW ELK RIVER 46.78N 116.18W
02/22/2011 M14.0 INCH CLEARWATER ID POST OFFICE

MEASURED AT THE POST OFFICE.

0600 PM HEAVY SNOW 2 NW HERON 48.08N 115.99W
02/22/2011 M11.4 INCH SANDERS MT CO-OP OBSERVER

24 HOUR TOTAL. 10 INCHES FELL BETWEEN 9 PM 02/21/11 TILL
730 AM 02/22/2011. DELAYED REPORT.

0700 PM HEAVY SNOW 6 SSW EUREKA 48.80N 115.11W
02/22/2011 M13.0 INCH LINCOLN MT TRAINED SPOTTER

0700 PM HEAVY SNOW EUREKA 48.88N 115.05W
02/22/2011 U13.0 INCH LINCOLN MT BROADCAST MEDIA

A LISTENER CALLED THIS REPORT INTO A LOCAL TV STATION.

0700 PM HEAVY SNOW EUREKA 48.88N 115.05W
02/22/2011 E8.0 INCH LINCOLN MT FIRE DEPT/RESCUE

MEASURED AT THE FIRE DEPARTMENT

0700 PM HEAVY SNOW 5 NNW EUREKA 48.94N 115.09W
02/22/2011 M11.0 INCH LINCOLN MT TRAINED SPOTTER

0700 AM HEAVY SNOW POWELL 46.58N 114.72W
02/23/2011 M8.8 INCH IDAHO ID CO-OP OBSERVER

24 HOUR TOTAL. STORM TOTALL 11.8 INCHES.

0743 AM HEAVY SNOW WEIPPE 46.38N 115.94W
02/23/2011 M6.0 INCH CLEARWATER ID TRAINED SPOTTER

OVERNIGHT TOTAL. STORM TOTAL 11 INCHES.

&&

$$

ZENNER

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KDLH [231836]: Preliminary Local Storm Report

NWUS53 KDLH 231836
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1236 PM CST WED FEB 23 2011

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

1200 PM SNOW GRAND RAPIDS 47.23N 93.52W
02/23/2011 M2.0 INCH ITASCA MN TRAINED SPOTTER

&&

$$

GRANING

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KDLH [231812]: Preliminary Local Storm Report

NWUS53 KDLH 231812
LSRDLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1211 PM CST WED FEB 23 2011

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

1210 PM SNOW NASHWAUK 47.38N 93.17W
02/23/2011 M1.3 INCH ITASCA MN TRAINED SPOTTER

&&

$$

GRANING

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KSEW [231743]: Preliminary Local Storm Report

NWUS56 KSEW 231743
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
943 AM PST WED FEB 23 2011

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

0930 AM SNOW 5 SSW ANACORTES 48.43N 122.67W
02/23/2011 M6.0 INCH SKAGIT WA TRAINED SPOTTER

6 INCHES IN THE LAST 3.5 HOURS.

&&

$$

CERNIGLIA

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 231726
SWODY2
SPC AC 231725

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1125 AM CST WED FEB 23 2011

VALID 241200Z - 251200Z

...THERE IS A MDT RISK OF SVR TSTMS LATE THU AFTN AND EVE ACROSS
MUCH OF SOUTHERN AND EASTERN ARKANSAS...PARTS OF NORTHERN
MISSISSIPPI AND WESTERN TENNESSEE...

...THERE IS A SLGT RISK OF SVR TSTMS SURROUNDING THE MODERATE RISK
AREA...FROM PARTS OF THE SOUTHERN PLAINS THRU THE LOWER OH AND TN
VALLEYS...

...SYNOPSIS...
MODELS SUGGEST THAT MID/UPPER FLOW WILL REMAIN BROADLY CONFLUENT
DOWNSTREAM OF PROMINENT EASTERN PACIFIC BLOCKING THROUGH MUCH OF
NORTH AMERICA DURING THIS FORECAST PERIOD. A STRONG JET APPEARS
LIKELY TO ROUND THE CREST OF A STRENGTHENING HIGH CENTER NEAR THE
GULF OF ALASKA...WITH A RIDGE AXIS BUILDING NORTHEASTWARD INTO
WESTERN CANADA. AS THIS OCCURS...A SIGNIFICANT SHORT WAVE TROUGH IS
PROGGED TO CONTINUE SLOWLY DIGGING SOUTHWARD NEAR THE NORTHERN
PACIFIC COAST. THIS WILL CONTRIBUTE TO THE NORTHEASTWARD
ACCELERATION OF A WEAKENING CIRCULATION CENTER NOW TURNING INLAND
ACROSS NORTHERN BAJA.

DESPITE THE DEAMPLIFICATION OF THIS LATTER FEATURE...GUIDANCE
INDICATES THAT FLOW FIELDS WILL INTENSIFY TO ITS SOUTH AND EAST...AS
IT ACCELERATES ACROSS THE SOUTHERN ROCKIES...INTO AND THROUGH THE
CREST OF A BROAD UPPER RIDGE OVER THE LOWER OHIO VALLEY BY 12Z
THURSDAY. LARGE-SCALE FORCING IS PROGGED TO SUPPORT FAIRLY
SIGNIFICANT SURFACE CYCLOGENESIS FROM THE OZARK PLATEAU THROUGH THE
OHIO VALLEY LATE THURSDAY AND THURSDAY NIGHT. WITH A RETURN FLOW
ALREADY DEVELOPING OFF AN INCREASING MOIST BOUNDARY LAYER OVER THE
WESTERN GULF OF MEXICO...THIS PROBABLY WILL BE ACCOMPANIED BY
CONSIDERABLE THUNDERSTORM ACTIVITY...INCLUDING THE RISK FOR SEVERE
STORMS. BY THURSDAY EVENING...IT APPEARS THAT THERE WILL BE A
WINDOW OF OPPORTUNITY FOR THE DEVELOPMENT OF CONDITIONS FAVORABLE
FOR ONE OR TWO STRONG TORNADOES...AND STRONG DAMAGING
WINDS...PARTICULARLY ACROSS PARTS OF SOUTHERN AND EASTERN ARKANSAS
INTO PARTS OF NORTHERN MISSISSIPPI AND WESTERN TENNESSEE.

...SOUTHERN PLAINS INTO THE SOUTHERN APPALACHIANS...
LAPSE RATES IN THE WARM SECTOR OF THE DEVELOPING SURFACE CYCLONE MAY
NOT BECOME PARTICULARLY STEEP THURSDAY...AND UNCERTAINTY EXISTS
CONCERNING THE POTENTIAL STABILIZING INFLUENCE OF EARLY DAY
CONVECTION AND PRECIPITATION...PARTICULARLY NORTHEAST OF THE OZARK
PLATEAU...AS WELL AS PORTIONS OF THE SOUTHERN PLAINS.
HOWEVER...NORTHWARD MOISTURE RETURN /INCLUDING INCREASING
PRECIPITABLE WATER UP TO 1.5 INCHES/ OFF THE WESTERN GULF SHOULD
COMPENSATE SOMEWHAT...CONTRIBUTING TO AT LEAST WEAK CAPE. GIVEN MID
60S TO NEAR 70F DEW POINTS CURRENTLY PRESENT FROM THE WESTERN GULF
INTO SOUTHERN TEXAS...CURRENT MODEL PROGS MAY BE A BIT LOW ON
BOUNDARY LAYER MOISTURE RETURN INTO THE LOWER MISSISSIPPI VALLEY AND
OZARK PLATEAU BY LATE THURSDAY AFTERNOON AND EVENING.

GIVEN BOUNDARY LAYER DESTABILIZATION AND INCREASINGLY DIFLUENT/
DIVERGENT UPPER FLOW WITH THE APPROACHING MID-LEVEL PERTURBATION
...WHICH IS PROGGED TO TAKE ON AN INCREASING NEGATIVE TILT
ORIENTATION...CONDITIONS MAY BECOME FAVORABLE FOR DISCRETE STORM
DEVELOPMENT ACROSS SOUTHERN AND EASTERN ARKANSAS DURING THE 21-23Z
TIME FRAME. COINCIDING WITH STRENGTHENING OF A SOUTHERLY 850 MB JET
IN EXCESS OF 50 KTS...UP TO 70 KT OR SO DURING THE EVENING
HOURS...AND THE EVOLUTION OF LARGE CLOCKWISE CURVED LOW-LEVEL
HODOGRAPHS BENEATH/NEAR A 90-100 KT 500 MB JET... POTENTIAL EXISTS
FOR SUPERCELLS CAPABLE OF PRODUCING STRONG TORNADOES.

ANY SUCH ACTIVITY IS EXPECTED TO FORM NEAR OR IN ADVANCE OF A
FRONTAL OR PRE-FRONTAL SQUALL LINE...WHICH APPEARS MORE CERTAIN TO
EVOLVE...BEFORE ADVANCING EASTWARD ACROSS UPPER PORTIONS OF THE
LOWER MISSISSIPPI VALLEY INTO THE TENNESSEE VALLEY THURSDAY NIGHT.
POTENTIAL FOR STRONG TORNADOES MAY PERSIST THROUGH THE 03-05Z TIME
FRAME ACROSS PARTS OF NORTHERN MISSISSIPPI AND WESTERN
TENNESSEE...WHILE DAMAGING WIND POTENTIAL CONTINUES DEEPER INTO THE
NIGHT TOWARD THE SOUTHERN APPALACHIANS.

..KERR.. 02/23/2011

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KDVN [231715]: Preliminary Local Storm Report

NWUS53 KDVN 231715
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1115 AM CST WED FEB 23 2011

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

1114 AM SLEET 3 NNE CHARLIE HEATH MEM 40.61N 91.87W
02/23/2011 U0.00 INCH VAN BUREN IA TRAINED SPOTTER

LIGHT SLEET JUST STARTED.

&&

$$

14

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MESO: Mesoscale Discussion 0120

ACUS11 KWNS 231630
SWOMCD
SPC MCD 231630
WAZ000-232030-

MESOSCALE DISCUSSION 0120
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM CST WED FEB 23 2011

AREAS AFFECTED...PORTIONS OF NWRN WA INVOF THE PUGET SOUND

CONCERNING...HEAVY SNOW

VALID 231630Z - 232030Z

SNOWFALL RATES REACHING OR EXCEEDING 1" PER HOUR LOCALLY CAN BE
EXPECTED INTO THIS AFTERNOON.

LATEST RADAR IMAGERY SHOWS A CONCENTRATED AREA OF HEAVIER
PRECIPITATION OVER ERN PORTIONS OF THE STRAIT OF JUAN DE FUCA AND
FAR NRN PORTIONS OF PUGET SOUND -- WITH IR LOOP CONFIRMING THE
INCREASING ASCENT WITH SUBSTANTIAL CLOUD-TOP COOLING.

THE ASCENT IS BEING FOCUSED ON THE MESOSCALE BY A VERY SMALL LOW IN
ERN PORTIONS OF THE STRAIT...WITH A CLEAR CIRCULATION EVIDENT IN
LATEST SURFACE MESOANALYSIS ACROSS THIS AREA. AS THE LARGER-SCALE
UPPER TROUGH SHIFTS SLOWLY SWD/SSEWD...A CORRESPONDING SWD SHIFT OF
THIS MESOLOW APPEARS POSSIBLE -- WHICH SHOULD ALLOW HEAVIER SNOWFALL
RATES TO SPREAD ACROSS NRN AND INTO CENTRAL PORTIONS OF THE PUGET
SOUND OVER THE NEXT FEW HOURS. WHILE ATTM IT APPEARS THAT SNOW MAY
REMAIN NORTH OF DOWNTOWN SEATTLE OVER THE NEXT FEW HOURS...STEADIER
SNOWFALL COULD POSSIBLY REACH SEATTLE THIS AFTERNOON.

..GOSS.. 02/23/2011

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

ATTN...WFO...SEW...

LAT...LON 47852316 48032338 48262368 48662351 48652271 47942214
47552229 47512292 47852316

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KSEW [231624]: Preliminary Local Storm Report

NWUS56 KSEW 231624
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
824 AM PST WED FEB 23 2011

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

0808 AM SNOW 3 NE BELFAST 48.58N 122.28W
02/23/2011 M4.5 INCH SKAGIT WA TRAINED SPOTTER

4.5 INCHES ON THE GROUND.

0808 AM SNOW 4 E MOUNT VERNON 48.42N 122.22W
02/23/2011 M6.0 INCH SKAGIT WA TRAINED SPOTTER

2 INCHES IN THE LAST 1/2 HOUR. 6 INCHES ON THE GROUND.

&&

$$

CERNIGLIA

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KFGF [231612]: Preliminary Local Storm Report

NWUS53 KFGF 231612
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1012 AM CST WED FEB 23 2011

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

1000 AM SNOW PARK RAPIDS 46.92N 95.06W
02/23/2011 M1.0 INCH HUBBARD MN EMERGENCY MNGR

3 HR SNOW TOTAL REPORTED BY EMERGENCY MANAGER.

&&

$$

WBARRETT

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231608
SWODY1
SPC AC 231606

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1006 AM CST WED FEB 23 2011

VALID 231630Z - 241200Z

...NO SVR TSTM AREAS FORECAST...

...SRN PLAINS...
AS HEIGHTS FALL PAC NW WITH COLD TROUGHING DEVELOPING SWD FROM
BC...THE UPPER LOW W OF BAJA HAS MADE THE EWD TURN ABOUT AS
EXPECTED. AT THE END OF FORECAST PERIOD...12Z THU...MODELS ARE IN
RELATIVELY CLOSE AGREEMENT BRINGING THE OPEN TROUGH ACROSS SRN
ROCKIES WITH THE ASSOCIATED LARGE SCALE ASCENT AND ACCOMPANYING JET
MAX ENTERING THE SRN PLAINS.

LEE LOW SRN PLAINS BECOMES BETTER ORGANIZED BY THIS EVENING AND
SHIFTS EWD INTO SWRN OK THU AM. DEVELOPING FRONTAL BAND WILL EXTEND
ENEWD FROM SURFACE LOW ACROSS OK AND ALONG MO/AR BORDER...SETTING
THE STAGE FOR AN ACTIVE SEVERE WEATHER DAY ON DY2.

MOIST GULF AIR CONTINUES TO FLOW NWD ACROSS SRN PLAINS THRU THE
FORECAST PERIOD...HOWEVER ANY ACTIVE CONVECTIVE DEVELOPMENT WILL BE
ELEVATED AND PRIMARILY OVERNIGHT WHEN LARGE SCALE SUPPORT RAMPS UP
WITH APPROACH OF S/WV TROUGH.

STRENGTHENING SWLY LLJ AND MOISTURE INFLOW AHEAD OF APPROACHING UPR
IMPULSE SHOULD SUPPORT INCREASING COVERAGE OF TSTMS TONIGHT THROUGH
EARLY THU ALONG AND TO THE N OF DEVELOPING FRONTAL ZONE FROM
CNTRL/ERN OK INTO NRN AR/SRN MO. PRESENCE OF RELATIVELY STEEP LAPSE
RATES AT MID LVLS SUGGEST THAT SUFFICIENT ELEVATED CAPE MAY DEVELOP
AOA 1250 J PER KG/ TO SUPPORT SVR HAIL OVER PARTS OF OK...NW AR...SE
KS AND PERHAPS FAR SW MO MOSTLY AFTER 06Z.

LATER TONIGHT/EARLY THU IN NW TX AS LEADING EDGE OF ASCENT WITH BAJA
TROUGH REACHES WRN EDGE OF PW AXIS AND OVERCOMES CAP A FEW STG
THUNDERSTORMS COULD DEVELOP. GIVEN STRENGTH OF WIND FIELD IN THIS
REGION...AND DEGREE OF BUOYANCY /MUCAPE TO 1000 J PER KG/ ...A
THREAT WILL EXIST FOR ISOLD SVR HAIL/LOCALLY DMGG WIND TOWARD 12Z
THU.

..HALES/STOPPKOTTE.. 02/23/2011

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KSEW [231554]: Preliminary Local Storm Report

NWUS56 KSEW 231554
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
754 AM PST WED FEB 23 2011

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

0730 AM SNOW 1 E MOUNT VERNON 48.42N 122.29W
02/23/2011 M4.0 INCH SKAGIT WA TRAINED SPOTTER

3 INCHES IN THE LAST 4 HOURS.

0749 AM SNOW 8 WNW DARRINGTON 48.30N 121.76W
02/23/2011 M14.5 INCH SKAGIT WA PUBLIC

14.5 INCHES ON THE GROUND SO FAR.

&&

$$

CERNIGLIA

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KPDT [231545]: Preliminary Local Storm Report

NWUS56 KPDT 231545
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
745 AM PST WED FEB 23 2011

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

0700 AM HEAVY SNOW SKI BLUEWOOD 46.08N 117.84W
02/23/2011 M19.0 INCH COLUMBIA WA PUBLIC

19 INCHES OF SNOW OVERNIGHT.

&&

$$

MVESCIO

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KLSX [231458]: Preliminary Local Storm Report

NWUS53 KLSX 231458
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
858 AM CST WED FEB 23 2011

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

0717 AM FREEZING RAIN 7 S BLAND 38.20N 91.63W
02/23/2011 M0.00 INCH GASCONADE MO TRAINED SPOTTER

SLIGHT GLAZE ON ELEVATED SURFACES. ROAD IN GOOD
CONDITION.

&&

$$

JG

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