KBIS [241643]: Preliminary Local Storm Report

NWUS53 KBIS 241643
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1043 AM CST MON DEC 24 2012

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

1035 AM SNOW BOTTINEAU 48.83N 100.44W
12/24/2012 M1.2 INCH BOTTINEAU ND CO-OP OBSERVER


&&

$$

LHUBER

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KBIS [241643]: Preliminary Local Storm Report

NWUS53 KBIS 241643
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1043 AM CST MON DEC 24 2012

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

0900 AM SNOW 7 NNW TAYLOR 46.99N 102.48W
12/24/2012 M1.1 INCH STARK ND CO-OP OBSERVER


&&

$$

LHUBER

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KFGF [241641]: Preliminary Local Storm Report

NWUS53 KFGF 241641
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1041 AM CST MON DEC 24 2012

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

0800 AM SNOW 5 NW DURBIN 46.86N 97.22W
12/24/2012 M1.4 INCH CASS ND COCORAHS

24 HR SNOWFALL


&&

$$

WBARRETT

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KREV [241639]: Preliminary Local Storm Report

NWUS55 KREV 241639
LSRREV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
839 AM PST MON DEC 24 2012

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

0400 AM SNOW 4 SSE CROWLEY LAKE 37.55N 118.71W
12/24/2012 M9.0 INCH MONO CA TRAINED SPOTTER

12 HR SNOWFALL AT 7000 FT.

0530 AM HEAVY SNOW 5 NE INCLINE VILLAGE 39.30N 119.90W
12/24/2012 M20.0 INCH WASHOE NV PUBLIC

DIAMOND PEAK SKI RESORT REPORTED 20 INCHES OF NEW SNOW IN
THE PAST 24 HOURS.

0700 AM HEAVY SNOW 1 NE INCLINE VILLAGE 39.26N 119.94W
12/24/2012 M32.0 INCH WASHOE NV TRAINED SPOTTER

A TRAINED WEATHER SPOTTER NEAR INCLINE VILLAGE AT AN
ELEVATION OF 6700 FEET REPORTED A STORM TOTAL OF 32
INCHES OF SNOWFALL FROM NOON ON FRIDAY, DECEMBER 21ST TO
3 AM ON MONDAY, DECEMBER 24TH.


&&

$$

SSNYDER

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KPIH [241635]: Preliminary Local Storm Report

NWUS55 KPIH 241635
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
935 AM MST MON DEC 24 2012

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

0915 AM HEAVY SNOW 6 WSW MALTA 42.27N 113.47W
12/24/2012 E7.0 INCH CASSIA ID TRAINED SPOTTER

3 INCHES OVERNIGHT. 7 INCHES TOTAL INCLUDING THIS
MORNING. CURRENTLY SNOWING HEAVY.


&&

$$

MH

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KOTX [241635]: Preliminary Local Storm Report...corrected

NWUS56 KOTX 241635
LSROTX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPOKANE WA
834 AM PST MON DEC 24 2012

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

0600 AM SNOW 6 NE ELK 48.08N 117.19W
12/24/2012 M3.0 INCH PEND OREILLE WA TRAINED SPOTTER

COCORAHS WA-PO-1

0604 AM HEAVY SNOW 3 NNW AIRWAY HEIGHTS 47.68N 117.61W
12/24/2012 M5.3 INCH SPOKANE WA OFFICIAL NWS OBS

NWS MEASUREMENT OF 5.3 INCHES IN 12 HOUR PERIOD FROM 6PM
TO 6AM.

0604 AM HEAVY SNOW 12 NNE DEER PARK 48.12N 117.33W
12/24/2012 M6.2 INCH PEND OREILLE WA CO-OP OBSERVER

SACHEEN LAKE CO-OP RECEIVED 5.2 INCHES AFTER MIDNIGHT AND
6.2 STORM TOTAL AS OF 6AM 12/24/2012.

0610 AM HEAVY SNOW 3 W DEARY 46.80N 116.62W
12/24/2012 E7.0 INCH LATAH ID PUBLIC

0610 AM SNOW MALAGA 47.37N 120.20W
12/24/2012 E3.2 INCH CHELAN WA PUBLIC

0700 AM SNOW CONCONULLY 48.56N 119.75W
12/24/2012 M3.0 INCH OKANOGAN WA CO-OP OBSERVER

0700 AM SNOW 4 NNW SPOKANE 47.72N 117.45W
12/24/2012 M3.0 INCH SPOKANE WA TRAINED SPOTTER

COCORAHS WA-SP-34

0700 AM SNOW 2 ENE ATHOL 47.95N 116.68W
12/24/2012 M3.0 INCH KOOTENAI ID TRAINED SPOTTER

COCORAHS ID-KT-3

0800 AM SNOW WATERVILLE 47.65N 120.07W
12/24/2012 M3.0 INCH DOUGLAS WA CO-OP OBSERVER

0800 AM HEAVY SNOW 1 NNE COLFAX 46.90N 117.36W
12/24/2012 M5.0 INCH WHITMAN WA TRAINED SPOTTER

STILL SNOWING HARD AT TIME OF REPORT. SPOTTER WHITMAN 58

0800 AM HEAVY SNOW FERNWOOD 47.11N 116.40W
12/24/2012 M5.0 INCH BENEWAH ID CO-OP OBSERVER

0800 AM SNOW WATERVILLE 47.65N 120.07W
12/24/2012 M3.0 INCH DOUGLAS WA CO-OP OBSERVER

0810 AM HEAVY SNOW S SANDPOINT 48.27N 116.56W
12/24/2012 E4.0 INCH BONNER ID TRAINED SPOTTER

STILL SNOWING. SPOTTER BONNER 49


&&

$$

JCOTE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 241631
SWODY1
SPC AC 241629

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1029 AM CST MON DEC 24 2012

VALID 241630Z - 251200Z

...THERE IS A SLGT RISK OF SVR TSTMS OVERNIGHT FOR PORTIONS
CENTRAL-E TX AND WRN LA...

...SYNOPSIS...
PROGRESSIVE UPPER-AIR PATTERN WAS ANALYZED THIS MORNING OVER
CONUS...FEATURING TWO SHORTWAVE TROUGHS OF PRIMARY PERTINENCE TO
THIS FCST INITIALLY OVER...
1. MID-SOUTH REGION TO MS/AL COAST. THIS FEATURE WILL MOVE EWD AND
DEAMPLIFY SLIGHTLY BEFORE MOVING OFFSHORE SC AROUND 03Z.
2. INLAND PAC NW SSEWD ACROSS NV. PERTURBATION IS FCST TO
STRENGTHEN THROUGH PERIOD AND MOVE SEWD ACROSS CENTRAL/SRN
ROCKIES...REACHING CENTRAL/SRN HIGH PLAINS BY 12Z. EMBEDDED/500-MB
CLOSED LOW SHOULD FORM BY 12Z OVER TX PANHANDLE/SOUTH-PLAINS
REGION...WHILE MID-UPPER HEIGHT GRADIENT INTENSIFIES MARKEDLY TO ITS
SW-SE. BY 12Z...EXPECT 500-MB JET MAX 90-100 KT OVER SERN NM/TX
PERMIAN BASIN REGION...WITH FLOW STRENGTHENING TO 60-70 KT RANGE
OVER SFC WARM SECTOR IN SE TX.

AT SFC...WEAK LOW NOW OVER NRN KY IS FCST TO PROCEED NEWD UP OH
VALLEY THROUGH REMAINDER DAYLIGHT HOURS AND WEAKEN...WITH OCCLUSION
TRIPLE-POINT LOW POSSIBLY FORMING INVOF SERN NY COASTAL WATERS
AROUND 06Z. ACCOMPANYING SFC COLD FRONT WAS ANALYZED AT 15Z FROM
LOW SSWWD ACROSS NRN AL...SWRN MS...SWRN LA...AND S-CENTRAL TX. TX
PORTION OF BOUNDARY IS DECELERATING...AND IS FCST TO MOVE NWD ACROSS
PORTIONS CENTRAL/SE TX OVERNIGHT AS WARM FRONT. MEANWHILE...LEE
CYCLONE IS FCST TO DEEPEN CONSIDERABLY TODAY ACROSS NERN NM AND SERN
CO REGION...WITH APCH OF AMPLIFYING TROUGH ALOFT. DURING LAST 6
HOURS OF PERIOD...SFC CYCLONE WILL TRANSITION TO FRONTAL-WAVE
FEATURE AND MOVE/REPOSITION SEWD ALONG ZONE OF
FRONTOGENESIS...REACHING POSITION OVER CENTRAL TX BY 12Z.

...TX/LA AREA OVERNIGHT...
CONVECTIVE POTENTIAL WILL INCREASE OVERNIGHT...FIRST N OF SFC FRONT
LATE EVENING THROUGH PRE-DAWN HOURS WITH MOST INTENSE CELLS POSING
HAIL THREAT. ACTIVITY MAY DEVELOP PROGRESSIVELY CLOSER TO FRONT
THROUGH END OF PERIOD...EVENTUALLY BECOMING SFC-BASED WITH
SUPERCELLS AND BOW/LEWP FEATURES POSSIBLE. AS SUCH...THREAT EXISTS
DURING LAST FEW HOURS OF PERIOD FOR SVR HAIL/GUSTS. TORNADO RISK
EXISTS FROM ANY SFC-BASED AND RELATIVELY DISCRETE CELLS IN WHAT
SHOULD BE VERY FAVORABLE SHEAR ENVIRONMENT...BUT COVERAGE OF
SFC-BASED TSTMS IS TOO UNCERTAIN ATTM FOR MORE THAN 5% UNCONDITIONAL
TORNADO RISK.

DEEP SHEAR AND LOW-LEVEL HODOGRAPHS EACH ARE EXPECTED TO STRENGTHEN
OVER RETURNING WARM SECTOR TONIGHT...AS 60S F SFC DEW POINTS
CONTRIBUTE TO 1000-1500 J/KG MLCAPE BY 12Z ALONG AND S OF FRONT OVER
SE TX. LARGEST LOW-LEVEL HODOGRAPHS WILL BE ALONG FRONT...WHERE
BACKED SFC WINDS WILL CONTRIBUTE TO EFFECTIVE SRH 300-500 J/KG. SRH
ALSO WILL BE FAVORABLE FARTHER S OVER COASTAL AREAS IN WARM
SECTOR...HOWEVER FCST SOUNDINGS SUGGEST PRONOUNCED EML-BASE
INVERSION BETWEEN 850-700 MB THAT MAY RESTRICT TSTM COVERAGE AWAY
FROM BOUNDARIES.

...CENTRAL-ERN GULF COASTAL PLAIN...NEXT 4-6 HOURS...
BULK OF CONVECTION IS EXPECTED TO OUTRUN LOW-LEVEL DESTABILIZATION
OVER THIS REGION THROUGH REMAINDER DAYLIGHT HOURS. HOWEVER...AT
LEAST ISOLATED TSTMS STILL MAY DEVELOP OVER THIS AREA THROUGH AROUND
21Z...SOME OF WHICH MAY BECOME SFC-BASED. DAMAGING WIND AND TORNADO
RISKS ARE NONZERO BUT VERY CONDITIONAL. DESTABILIZATION WILL BE
SLOWED BY ONGOING CLOUDS/PRECIP...WHICH WILL RESTRICT PACE OF
DIURNAL WARMING. LOW-LEVEL THETAE ADVECTION SHOULD RESULT IN
POTENTIAL INFLOW PARCELS EFFECTIVELY BECOMING SFC-BASED ACROSS THIS
REGION THROUGH MID-AFTN...WHILE DEEP-LAYER ASCENT WEAKENS. THESE
OFFSETTING INFLUENCES WILL AFFECT TSTM COVERAGE...BUT ANY
SUSTAINED/SFC-BASED CONVECTION HAS POTENTIAL TO BECOME
SUPERCELLULAR. AS SUCH...WILL MAINTAIN MRGL UNCONDITIONAL SVR
PROBABILITIES FOR THIS OUTLOOK.

..EDWARDS/COHEN.. 12/24/2012

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KMPX [241630]: Preliminary Local Storm Report

NWUS53 KMPX 241630
LSRMPX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1029 AM CST MON DEC 24 2012

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

1029 AM SNOW NORTH ST PAUL 45.01N 93.00W
12/24/2012 M0.5 INCH RAMSEY MN TRAINED SPOTTER


&&

$$

AJZ

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KRNK [241627]: Preliminary Local Storm Report

NWUS51 KRNK 241627
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1127 AM EST MON DEC 24 2012

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

0915 AM FREEZING RAIN HOT SPRINGS 38.00N 79.83W
12/24/2012 E0.00 INCH BATH VA 911 CALL CENTER

SOME SLICK SPOTS ON AREA ROADWAYS AND ELEVATED SURFACES


&&

EVENT NUMBER RNK1200359

$$

JVC

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KFGF [241625]: Preliminary Local Storm Report

NWUS53 KFGF 241625
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1025 AM CST MON DEC 24 2012

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

0800 AM SNOW VALLEY CITY 46.92N 98.01W
12/24/2012 M1.0 INCH BARNES ND CO-OP OBSERVER

24 HR SNOWFALL


&&

$$

WBARRETT

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KRNK [241623]: Preliminary Local Storm Report

NWUS51 KRNK 241623
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1123 AM EST MON DEC 24 2012

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

0915 AM FREEZING RAIN COVINGTON 37.79N 79.99W
12/24/2012 E0.00 INCH CITY OF COVINGTON VA 911 CALL CENTER

SOME ICING ON AREA ROADWAYS AND ELEVATED SURFACES


&&

EVENT NUMBER RNK1200358

$$

JVC

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KRNK [241620]: Preliminary Local Storm Report

NWUS51 KRNK 241620
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1119 AM EST MON DEC 24 2012

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

0915 AM FREEZING RAIN 1 ENE LEWISBURG 37.81N 80.43W
12/24/2012 E0.00 INCH GREENBRIER WV 911 CALL CENTER

SOME ICING ON AREA ROADWAYS AND ELEVATED SURFACES


&&

EVENT NUMBER RNK1200357

$$

JVC

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KPIH [241616]: Preliminary Local Storm Report

NWUS55 KPIH 241616
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
916 AM MST MON DEC 24 2012

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

0915 AM SNOW S ASHTON 44.07N 111.45W
12/24/2012 M2.0 INCH FREMONT ID TRAINED SPOTTER

SNOWFALL OVERNIGHT. STILL SNOWING.


&&

$$

MH

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KHNX [241605]: Preliminary Local Storm Report

NWUS56 KHNX 241605
LSRHNX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
805 AM PST MON DEC 24 2012

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

0800 AM HEAVY SNOW TUOLUMNE MEADOWS 37.87N 119.35W
12/24/2012 M18.0 INCH TUOLUMNE CA CO-OP OBSERVER

REPORTED BY PARK RANGER. TOTAL SNOW ON GROUND NOW 54
INCHES.


&&

$$

BPET

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KMFR [241601]: Preliminary Local Storm Report

NWUS56 KMFR 241601
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
801 AM PST MON DEC 24 2012

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

0759 AM SNOW SPRAGUE RIVER 42.46N 121.50W
12/24/2012 E0.0 INCH KLAMATH OR PUBLIC

SNOW ROLLERS ON SUNDAY.


&&

$$

GLASER

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KMSO [241550]: Preliminary Local Storm Report

NWUS55 KMSO 241550
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
849 AM MST MON DEC 24 2012

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

0840 AM SNOW 2 S CONDON 47.51N 113.70W
12/24/2012 M4.0 INCH MISSOULA MT TRAINED SPOTTER

4 INCHES MEASURED THIS MORNING. WAS SNOWING
MODERATELY EARLY THIS MORNING BUT HAS SINCE
DECREASED. SNOW DURATION 8 HOURS

&&

$$

IRIS SYSTEM

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KFGF [241539]: Preliminary Local Storm Report

NWUS53 KFGF 241539
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
939 AM CST MON DEC 24 2012

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

0800 AM SNOW SABIN 46.78N 96.65W
12/24/2012 M1.3 INCH CLAY MN CO-OP OBSERVER

24 HR SNOWFALL


&&

$$

WBARRETT

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MESO: Mesoscale Discussion 2201

ACUS11 KWNS 241534
SWOMCD
SPC MCD 241534
MDZ000-WVZ000-VAZ000-PAZ000-OHZ000-241800-

MESOSCALE DISCUSSION 2201
NWS STORM PREDICTION CENTER NORMAN OK
0934 AM CST MON DEC 24 2012

AREAS AFFECTED...E-CNTRL/SERN OH...NRN WV...WRN PART OF THE MD
PANHANDLE...SWRN PA...FAR WRN VA

CONCERNING...WINTER MIXED PRECIPITATION

VALID 241534Z - 241800Z

SUMMARY...AREAS OF FREEZING RAIN WITH RATES APPROACHING 0.05 INCH
PER 3 HOURS...AS WELL AS SLEET AND POSSIBLY LIGHT SNOW...WILL SHIFT
NEWD THROUGH 17Z-18Z.

DISCUSSION...UPPER AIR ANALYSIS SUGGESTS AN ONGOING WARM ADVECTION
REGIME FROM THE UPPER OH VALLEY EWD ACROSS THE CNTRL APPALACHIANS IN
ASSOCIATION WITH A LOWER TROPOSPHERIC WAVE PROGRESSING ENEWD/NEWD
ACROSS THE AREA. WHILE RADAR DATA DEPICT LIGHT PRECIPITATION ECHOES
ALOFT...SFC TEMPERATURE-DEWPOINT SPREADS OF 3-5F SUGGEST THAT
SUB-CLOUD EVAPORATION/SUBLIMATION PROCESSES ARE PREVENTING THIS
PRECIPITATION FROM REACHING THE GROUND IN MANY LOCATIONS.
HOWEVER...DOWNWARD COLUMNAR MOISTENING WILL CONTINUE THROUGH LATE
MORNING IN ASSOCIATION WITH CONTINUED PRECIPITATION ALOFT AS WARM
ADVECTION PERSISTS. THIS WILL INCREASE THE POTENTIAL FOR
PRECIPITATION TO REACH THE SFC THROUGH LATE MORNING.
PARTIAL/COMPLETE MELTING WILL OCCUR AS HYDROMETEORS FALL THROUGH AN
ELEVATED WARM LAYER FEATURING TEMPERATURES OF AROUND 1-4C -- NOTED
BETWEEN 920 MB AND 850 MB PER PITTSBURGH PA/WILMINGTON OH 12Z RAOBS.
FOR AREAS WHERE SFC TEMPERATURES REMAIN BELOW FREEZING...ESPECIALLY
OVER SHELTERED VALLEYS...FREEZING RAIN AND SLEET...AND PERHAPS LIGHT
SNOW...WILL BE POSSIBLE. FREEZING RAIN RATES APPROACHING 0.05 INCH
PER 3 HOURS MAY ENSUE THROUGH 17Z-18Z. THEREAFTER...SFC-LAYER WARM
ADVECTION COMBINED WITH DIURNAL HEATING SHOULD SUPPORT PREDOMINANTLY
RAIN.

..COHEN.. 12/24/2012

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

ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...

LAT...LON 40057969 39707877 39237866 38727903 37777989 37758042
38448016 38728040 38908139 39148198 40018173 40198085
40057969

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KBIS [241511]: Preliminary Local Storm Report

NWUS53 KBIS 241511
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
911 AM CST MON DEC 24 2012

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

0700 AM SNOW 15 NNW BEULAH 47.46N 101.90W
12/24/2012 M2.0 INCH MERCER ND COCORAHS


&&

$$

LHUBER

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KBIS [241510]: Preliminary Local Storm Report

NWUS53 KBIS 241510
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
910 AM CST MON DEC 24 2012

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

0700 AM SNOW LINTON 46.27N 100.23W
12/24/2012 M1.0 INCH EMMONS ND CO-OP OBSERVER


&&

$$

LHUBER

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KBIS [241510]: Preliminary Local Storm Report

NWUS53 KBIS 241510
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
910 AM CST MON DEC 24 2012

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

0800 AM SNOW HAZEN 47.29N 101.62W
12/24/2012 M2.8 INCH MERCER ND COCORAHS


&&

$$

LHUBER

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KTFX [241509]: Preliminary Local Storm Report

NWUS55 KTFX 241509
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
809 AM MST MON DEC 24 2012

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

0806 AM SNOW CHOTEAU 47.81N 112.18W
12/24/2012 M4.0 INCH TETON MT TRAINED SPOTTER

4 INCHES OF SNOW OVERNIGHT IN CHOTEAU.


&&

$$

NJL

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KBIS [241508]: Preliminary Local Storm Report

NWUS53 KBIS 241508
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
908 AM CST MON DEC 24 2012

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

0800 AM SNOW FLASHER 46.46N 101.23W
12/24/2012 M1.4 INCH MORTON ND CO-OP OBSERVER


&&

$$

LHUBER

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KMFR [241505]: Preliminary Local Storm Report

NWUS56 KMFR 241505
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
705 AM PST MON DEC 24 2012

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

0500 AM HEAVY RAIN SSW GOLD BEACH 42.41N 124.42W
12/24/2012 M1.65 INCH CURRY OR TRAINED SPOTTER

5AM TO 5AM.

0700 AM HEAVY RAIN NE BROOKINGS 42.06N 124.29W
12/24/2012 M0.86 INCH CURRY OR TRAINED SPOTTER

7AM TO 7AM. MOST OF THE RAIN FELL BEFORE 7PM.


&&

$$

GLASER

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KPIH [241448]: Preliminary Local Storm Report

NWUS55 KPIH 241448
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
748 AM MST MON DEC 24 2012

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

0747 AM SNOW 4 NW BELLEVUE 43.52N 114.31W
12/24/2012 M7.5 INCH BLAINE ID TRAINED SPOTTER

TWO DAY TOTAL ACCUMULATION


&&

$$

JAH

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KBIS [241442]: Preliminary Local Storm Report

NWUS53 KBIS 241442
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
842 AM CST MON DEC 24 2012

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

0800 AM SNOW ASHLEY 46.03N 99.37W
12/24/2012 M1.1 INCH MCINTOSH ND CO-OP OBSERVER


&&

$$

LHUBER

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KVEF [241433]: Preliminary Local Storm Report

NWUS55 KVEF 241433
LSRVEF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
633 AM PST MON DEC 24 2012

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

0331 AM NON-TSTM WND GST 5 ENE BOULDER CITY 36.01N 114.74W
12/24/2012 M42.00 MPH CLARK NV MESONET

0334 AM NON-TSTM WND GST 1 ESE RED ROCK CANYON 36.13N 115.43W
12/24/2012 M53.00 MPH CLARK NV MESONET

0450 AM NON-TSTM WND GST 1 SE MT. CHARLESTON 36.27N 115.60W
12/24/2012 M46.00 MPH CLARK NV MESONET

0500 AM NON-TSTM WND GST 3 NE MT. CHARLESTON 36.32N 115.58W
12/24/2012 E48.00 MPH CLARK NV MESONET

0555 AM NON-TSTM WND GST 4 ENE FORT IRWIN 35.28N 116.62W
12/24/2012 M49.00 MPH SAN BERNARDINO CA ASOS


&&

$$

MORGAN

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KFGF [241433]: Preliminary Local Storm Report

NWUS53 KFGF 241433
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
832 AM CST MON DEC 24 2012

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

0800 AM SNOW PELICAN RAPIDS 46.57N 96.09W
12/24/2012 M1.0 INCH OTTER TAIL MN CO-OP OBSERVER

24 HR SNOWFALL


&&

$$

WBARRETT

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KBIS [241423]: Preliminary Local Storm Report

NWUS53 KBIS 241423
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
823 AM CST MON DEC 24 2012

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

0800 AM SNOW UNDERWOOD 47.46N 101.14W
12/24/2012 M1.2 INCH MCLEAN ND CO-OP OBSERVER


&&

$$

LHUBER

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KBIS [241422]: Preliminary Local Storm Report

NWUS53 KBIS 241422
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
822 AM CST MON DEC 24 2012

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

0730 AM SNOW WILTON 47.16N 100.78W
12/24/2012 M1.8 INCH MCLEAN ND COCORAHS


&&

$$

LHUBER

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KBIS [241422]: Preliminary Local Storm Report

NWUS53 KBIS 241422
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
822 AM CST MON DEC 24 2012

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

0600 AM SNOW 8 NNW UPHAM 48.68N 100.79W
12/24/2012 M2.1 INCH BOTTINEAU ND COCORAHS


&&

$$

LHUBER

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KBIS [241421]: Preliminary Local Storm Report

NWUS53 KBIS 241421
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
821 AM CST MON DEC 24 2012

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

0800 AM SNOW 14 SSE NEW SALEM 46.66N 101.30W
12/24/2012 M1.5 INCH MORTON ND COCORAHS


&&

$$

LHUBER

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KBIS [241419]: Preliminary Local Storm Report

NWUS53 KBIS 241419
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
819 AM CST MON DEC 24 2012

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

0818 AM SNOW MINOT 48.23N 101.30W
12/24/2012 M1.6 INCH WARD ND CO-OP OBSERVER


&&

$$

LHUBER

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KBIS [241418]: Preliminary Local Storm Report

NWUS53 KBIS 241418
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
818 AM CST MON DEC 24 2012

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

0800 AM SNOW WATFORD CITY 47.80N 103.28W
12/24/2012 M1.0 INCH MCKENZIE ND CO-OP OBSERVER


&&

$$

LHUBER

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KOTX [241408]: Preliminary Local Storm Report

NWUS56 KOTX 241408
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
607 AM PST MON DEC 24 2012

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

0604 AM HEAVY SNOW 12 NNE DEER PARK 48.12N 117.33W
12/24/2012 M6.2 INCH PEND OREILLE WA CO-OP OBSERVER

SACHEEN LAKE CO-OP RECEIVED 5.2 INCHES AFTER MIDNIGHT AND
6.2 STORM TOTAL AS OF 6AM 12/24/2012.


&&

$$

FLIEHMAN

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KOTX [241407]: Preliminary Local Storm Report

NWUS56 KOTX 241407
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
607 AM PST MON DEC 24 2012

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

0604 AM HEAVY SNOW 3 NNW AIRWAY HEIGHTS 47.68N 117.61W
12/24/2012 M5.3 INCH SPOKANE WA OFFICIAL NWS OBS

NWS MEASUREMENT OF 5.3 INCHES IN 12 HOUR PERIOD FROM 6PM
TO 6AM.


&&

$$

FLIEHMAN

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KBIS [241403]: Preliminary Local Storm Report

NWUS53 KBIS 241403
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
802 AM CST MON DEC 24 2012

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

1200 AM SNOW BISMARCK 46.81N 100.78W
12/24/2012 M1.4 INCH BURLEIGH ND OFFICIAL NWS OBS

STORM TOTAL SNOW.


&&

$$

LHUBER

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KBIS [241401]: Preliminary Local Storm Report

NWUS53 KBIS 241401
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
801 AM CST MON DEC 24 2012

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

0700 AM SNOW BISMARCK 46.81N 100.78W
12/24/2012 M1.5 INCH BURLEIGH ND CO-OP OBSERVER


&&

$$

LHUBER

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KBIS [241358]: Preliminary Local Storm Report

NWUS53 KBIS 241358
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
758 AM CST MON DEC 24 2012

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

0614 AM SNOW KILLDEER 47.37N 102.75W
12/24/2012 M1.1 INCH DUNN ND CO-OP OBSERVER


&&

$$

LHUBER

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KFGF [241349]: Preliminary Local Storm Report

NWUS53 KFGF 241349
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
749 AM CST MON DEC 24 2012

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

0744 AM SNOW MOORHEAD 46.86N 96.76W
12/24/2012 M1.3 INCH CLAY MN CO-OP OBSERVER

SNOWFALL TOTAL


&&

$$

BRAMER

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KFGF [241347]: Preliminary Local Storm Report

NWUS53 KFGF 241347
LSRFGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
747 AM CST MON DEC 24 2012

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

0744 AM SNOW MAYVILLE 47.50N 97.33W
12/24/2012 M1.7 INCH TRAILL ND CO-OP OBSERVER

SNOWFALL TOTAL


&&

$$

BRAMER

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 241233
SWODY1
SPC AC 241231

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0631 AM CST MON DEC 24 2012

VALID 241300Z - 251200Z

...THERE IS A SLGT RISK OF SVR TSTMS TONIGHT INTO TUESDAY MORNING
ACROSS PORTIONS OF ERN TX AND WRN LA...

...SYNOPSIS...

A SHORTWAVE TROUGH CURRENTLY OVER THE LOWER MS VALLEY WILL RAPIDLY
TRANSLATE EWD ACROSS THE GULF STATES TODAY IN ADVANCE OF
INTENSIFYING MID AND UPPER-LEVEL JET STREAKS WHICH WILL DEVELOP FROM
THE FAR ERN PACIFIC AND CA SEWD INTO THE SRN ROCKIES AND LOWER RIO
GRANDE VALLEY BY 25/12Z. FORCING FOR ASCENT IN THE EXIT REGION OF
THE JET STREAKS COUPLED WITH INCREASING DCVA AHEAD OF AMPLIFYING
COMPANION SHORTWAVE TROUGH WILL RESULT IN A CORRIDOR OF 500-MB
HEIGHT FALLS OF AROUND 100M/12-HR SPREADING SEWD FROM THE SRN
ROCKIES INTO WRN TX LATE TONIGHT INTO TUESDAY MORNING.

IN THE LOW LEVELS...A SURFACE CYCLONE ASSOCIATED WITH THE LOWER MS
VALLEY IMPULSE MENTIONED ABOVE WILL DEVELOP NEWD INTO THE UPPER OH
VALLEY BY THIS EVENING WHILE A TRAILING COLD FRONT SETTLES SEWD TO
THE WRN/CNTRL GULF COAST BEFORE BECOMING STATIONARY TONIGHT.
FARTHER W...LEE CYCLOGENESIS WILL COMMENCE TODAY OVER THE SRN HIGH
PLAINS WITH A DISTINCT LOW PRESSURE CENTER DEVELOPING SEWD FROM NERN
NM INTO CNTRL TX BY 25/12Z. THE PROGRESSION OF THIS FEATURE WILL
RESULT IN THE NWD MOVEMENT OF A WARM FRONT FROM THE TX COASTAL
PLAINS AND SRN LA TO BETWEEN THE I-10 AND I-20 CORRIDORS BY THE END
OF THE D1 PERIOD.

...ERN TX INTO CNTRL/SRN LA TONIGHT...

TEMPORARY HEIGHT RISES IN THE WAKE OF LOWER MS VALLEY DISTURBANCE
WILL STRENGTHEN THE EXISTING CAP AND EFFECTIVELY INHIBIT TSTM
DEVELOPMENT THROUGH THIS AFTERNOON ALONG THE DECELERATING COLD
FRONT. TONIGHT...THE DEVELOPMENT OF A SSWLY LLJ WITHIN THE EXIT
REGION OF THE APPROACHING UPPER-LEVEL JET STREAK WILL ENHANCE THE
NWD FLUX OF AN INCREASINGLY MOIST BOUNDARY LAYER...AND THE POLEWARD
MOVEMENT OF THE SURFACE WARM FRONT. THESE PROCESSES WILL COINCIDE
WITH STEEPENING MIDLEVEL LAPSE RATES...YIELDING RAPID AIR MASS
DESTABILIZATION AFTER SUNSET WITH MUCAPE VALUES APPROACHING
1000-2000 J/KG BY TUESDAY MORNING.

ELEVATED TSTMS ARE EXPECTED TO DEVELOP BY AS EARLY AS 25/02Z-03Z TO
THE NORTH OF THE SURFACE WARM FRONT FROM THE TX HILL COUNTRY INTO
THE SABINE RIVER VALLEY AS LOW-LEVEL MOISTENING/ASCENT GRADUALLY
OVERCOME THE CAP. STORMS ARE EXPECTED INCREASE IN COVERAGE AND
INTENSITY OVERNIGHT AS DEEP-LAYER ASCENT FURTHER STRENGTHENS IN EXIT
REGION OF UPPER-LEVEL JET STREAK. THE PRIMARY HAZARD WILL BE LARGE
HAIL OWING TO THE STEEP LAPSE RATES...COOL MIDLEVEL TEMPERATURE
PROFILES...AND EFFECTIVE BULK SHEAR VALUES OF 40-50 KT.

THE THREAT FOR SURFACE-BASED STORMS...INCLUDING TORNADIC
SUPERCELLS...IS EXPECTED TO INCREASE BETWEEN 25/09Z-12Z ALONG THE
RETREATING WARM FRONT WHERE BOUNDARY LAYER DEWPOINTS IN THE LOW/MID
60S PROMOTE MLCAPE VALUES APPROACHING 1000-1500 J/KG. THIS
INSTABILITY WILL COINCIDE WITH EFFECTIVE SRH VALUES OF 200-300 M2/S2
AND 40-50 KT OF DEEP-LAYER SHEAR...RESULTING IN A FAVORABLE
ENVIRONMENT FOR UPDRAFT SUSTENANCE/ROTATION. DAMAGING WIND
POTENTIAL WILL ALSO INCREASE...ESPECIALLY WITH ANY EVOLVING LINE
SEGMENTS/BOWING STRUCTURES.

...CNTRL/ERN GULF COAST TODAY...

THE STRONGEST FORCING FOR ASCENT/DCVA ASSOCIATED WITH THE LOWER MS
VALLEY SHORTWAVE TROUGH WILL BECOME PROGRESSIVELY DISPLACED FROM A
MOISTENING WARM SECTOR...CHARACTERIZED BY MUCAPE OF 1500-1800 J/KG
PER 12Z LCH/LIX SOUNDINGS. NONETHELESS...LOW-LEVEL CONFLUENT FLOW
COUPLED WITH THE GLANCING INFLUENCE OF THE SHORTWAVE TROUGH WILL
SUSTAIN A MIXTURE OF ELEVATED AND SOME SURFACE BASED STORMS TODAY
WITHIN A WARMING/DESTABILIZING AIR MASS FROM SERN PARTS OF LA/MS
INTO SRN AL AND THE FL PNHDL. FORECAST HODOGRAPHS ACROSS THIS
REGION EXHIBIT VERTICALLY VEERING WIND PROFILES WITH SUFFICIENT
LOW-LEVEL AND DEEP-LAYER SHEAR FOR ROTATING STORMS. AS SUCH...A LOW
PROBABILITY RISK FOR DAMAGING WINDS AND PERHAPS A TORNADO WILL EXIST
WITH ANY SUSTAINED...SURFACE-BASED STORMS.

..MEAD/LEITMAN.. 12/24/2012

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KBIS [241216]: Preliminary Local Storm Report

NWUS53 KBIS 241216
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
616 AM CST MON DEC 24 2012

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

0615 AM SNOW HARVEY 47.77N 99.94W
12/24/2012 M3.0 INCH WELLS ND BROADCAST MEDIA

STORM TOTAL SNOW.


&&

$$

LHUBER

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KBIS [241207]: Preliminary Local Storm Report

NWUS53 KBIS 241207
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
607 AM CST MON DEC 24 2012

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

0600 AM SNOW JAMESTOWN 46.91N 98.71W
12/24/2012 M1.0 INCH STUTSMAN ND CO-OP OBSERVER

24 HOUR SNOWFALL TOTAL ENDING AT 6 AM.


&&

$$

LHUBER

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KBIS [241134]: Preliminary Local Storm Report

NWUS53 KBIS 241134
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
534 AM CST MON DEC 24 2012

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

0500 AM SNOW LANSFORD 48.63N 101.38W
12/24/2012 M3.3 INCH BOTTINEAU ND CO-OP OBSERVER

24 HOUR SNOWFALL TOTAL ENDING AT 5 AM.


&&

$$

LHUBER

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 240949
SWOD48
SPC AC 240948

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0348 AM CST MON DEC 24 2012

VALID 271200Z - 011200Z

...DISCUSSION...
THE MEDIUM RANGE MODELS BEGIN THE DAY 4 TO 8 PERIOD WITH AN
UPPER-LEVEL LOW OVER THE NERN STATES AND AN UPPER-LEVEL TROUGH
ACROSS THE INTERMOUNTAIN WEST. THE MODELS MOVE THE WRN US
UPPER-LEVEL TROUGH INTO THE GREAT PLAINS ON FRIDAY/DAY 5 AND INTO
THE MS VALLEY ON SATURDAY/DAY 6. AHEAD OF THIS SYSTEM...THUNDERSTORM
ACTIVITY WILL BE POSSIBLE IN THE LOWER MS VALLEY AND CNTRL GULF
COAST STATES FRIDAY THROUGH FRIDAY NIGHT AND IN THE ERN GULF COAST
STATES ON SATURDAY BUT MOISTURE RETURN AHEAD OF THE SYSTEM IS
FORECAST TO BE LIMITED. IN ADDITION...A RATHER COLD AIRMASS IS
FORECAST TO BE IN PLACE ACROSS MUCH OF THE UNITED STATES SUGGESTING
THE POTENTIAL FOR SEVERE STORMS WILL BE LOW DURING THE DAY 4 TO 8
PERIOD.

..BROYLES.. 12/24/2012

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KSTO [240921]: Preliminary Local Storm Report

NWUS56 KSTO 240921
LSRSTO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
121 AM PST MON DEC 24 2012

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

1200 AM HEAVY RAIN GRASS VALLEY 39.22N 121.06W
12/24/2012 M2.56 INCH NEVADA CA TRAINED SPOTTER

ELEVATION: 2420 FT HEAVY RAIN DURATION 24
HOURS

&&

$$

IRIS SYSTEM

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KKEY [240920]: Preliminary Local Storm Report

NWUS52 KKEY 240920
LSRKEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
419 AM EST MON DEC 24 2012

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

0102 PM NON-TSTM WND GST 10 SW KEY WEST 24.46N 81.88W
12/21/2012 M40.00 MPH GMZ044 FL C-MAN STATION

THE SAND KEY C-MAN STATION MEASURED A NORTHERLY WIND GUST
OF 35 KNOTS DURING THE PASSAGE OF FRIDAYS COLD FRONT.

0333 PM NON-TSTM WND GST 10 SW KEY WEST 24.46N 81.88W
12/21/2012 M41.00 MPH GMZ044 FL C-MAN STATION

THE SAND KEY C-MAN STATION MEASURED A NORTHERLY WIND GUST
OF 36 KNOTS DURING THE PASSAGE OF FRIDAYS COLD FRONT.


&&

$$

CLR

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KKEY [240900]: Preliminary Local Storm Report

NWUS52 KKEY 240900
LSRKEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
359 AM EST MON DEC 24 2012

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

0420 PM NON-TSTM WND GST 11 NW KEY WEST 24.68N 81.90W
12/21/2012 M44 MPH GMZ032 FL MESONET

THE MESONET STATION AT SMITH SHOAL MEASURED A NORTHERLY
WIND GUST OF 38 KNOTS DURING THE PASSAGE OF FRIDAYS COLD
FRONT.


&&

$$

CLR

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 240832
SWODY3
SPC AC 240831

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0231 AM CST MON DEC 24 2012

VALID 261200Z - 271200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE ERN GULF
COAST STATES...FL PENINSULA...CAROLINAS AND MID-ATLANTIC...

...CAROLINAS/ERN GULF COAST STATES/MID-ATLANTIC...
AN IMPRESSIVE NEGATIVELY-TILTED UPPER-LEVEL SYSTEM IS FORECAST TO
MOVE QUICKLY NEWD ACROSS THE ATLANTIC COASTAL REGION ON WEDNESDAY.
AN UPPER-LEVEL LOW OVER THE MID MS VALLEY AT DAYBREAK ON WEDNESDAY
SHOULD MOVE NEWD ACROSS THE OH VALLEY AS A SLAB OF VERY STRONG
LARGE-SCALE ASCENT MOVES FROM THE ERN GULF COAST STATES EWD ACROSS
THE CAROLINAS WEDNESDAY AFTERNOON. DUE TO THE STRONG FORCING...A
WELL-DEVELOPED SQUALL-LINE SHOULD BE ONGOING AT 12Z ON WEDNESDAY
WITH THIS LINEAR CONVECTIVE SYSTEM REMAINING INTACT ALL THE WAY TO
THE COAST.

FORECAST SOUNDINGS AT 21Z/WED AHEAD OF THE SQUALL-LINE IN ERN NC AND
NCNTRL SC SHOW INCREASING INSTABILITY DURING THE LATE MORNING AND
EARLY AFTERNOON WITH SFC DEWPOINTS REACHING THE LOWER 60S F. THIS
MAY ALLOW MODERATE INSTABILITY TO DEVELOP ACROSS PARTS OF THE ERN
CAROLINAS WEDNESDAY AFTERNOON. IN ADDITION...A WELL-DEVELOPED
LOW-LEVEL JET COMBINED WITH A POWERFUL MID-LEVEL JET WRAPPING AROUND
THE UPPER-LEVEL LOW WILL CREATE STRONG DEEP LAYER SHEAR PROFILES
FAVORABLE FOR SEVERE STORMS. ACROSS MUCH OF THE REGION...WINDS IN
THE BOUNDARY LAYER ARE FORECAST TO EXCEED 50 KT JUST ABOVE THE SFC
WHICH SHOULD ENABLE ANY LINE OF STORMS TO BE EFFICIENT AT PRODUCING
WIND DAMAGE. IF DISCRETE CELLS CAN INITIATE AHEAD OF THE APPROACHING
SQUALL-LINE...THEN A SUBSTANTIAL TORNADO THREAT COULD ALSO DEVELOP
WEDNESDAY AFTERNOON WITH THE POTENTIAL FOR A STRONG TORNADO.
CONSIDERING THE STRENGTH OF THE UPPER-LEVEL SYSTEM WHICH COMBINED
WITH MODERATE INSTABILITY AND STRONG DEEP LAYER SHEAR...ANY SEVERE
THREAT THAT DEVELOPS ACROSS THE CAROLINAS COULD BECOME ENHANCED. FOR
THIS REASON...A 30 PERCENT SEVERE PROBABILITY WITH A SIGNIFICANT
HATCHED AREA APPEARS WARRANTED.

FURTHER TO THE NORTH ACROSS THE MID-ATLANTIC...ANY SEVERE THREAT
WITH THE LINE OF STORMS SHOULD BE MORE ISOLATED DUE TO WEAKENING
INSTABILITY WITH NWD EXTENT. TO THE SOUTH ACROSS ERN GA AND NRN
FL...A SUBSTANTIAL WIND DAMAGE THREAT COULD EXIST BUT THE THREAT
SHOULD DECREASE WITH SWD EXTENT DUE TO WEAKER LARGE-SCALE ASCENT AND
DEEP LAYER SHEAR.

..BROYLES.. 12/24/2012

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