KMSO [171439]: Preliminary Local Storm Report

NWUS55 KMSO 171439
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
739 AM MST MON DEC 17 2012

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

0735 AM HEAVY SNOW 6 NE HERON 48.12N 115.85W
12/17/2012 M7.5 INCH SANDERS MT TRAINED SPOTTER

3.5" OVERNIGHT AND 4" LAST EVENING. HEAVY
SNOW DURATION 12 HOURS

&&

$$

IRIS SYSTEM

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KMSO [171437]: Preliminary Local Storm Report

NWUS55 KMSO 171437
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
736 AM MST MON DEC 17 2012

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

0730 AM HEAVY SNOW 1 ESE LIBBY 48.38N 115.53W
12/17/2012 E6.0 INCH LINCOLN MT LAW ENFORCEMENT

LIBBY DISPACTH REPORTS 5-6" OF SNOW
OVERNIGHT, STILL SNOWING WITH LARGE FLAKES.
HEAVY SNOW DURATION 12 HOURS

&&

$$

IRIS SYSTEM

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KPIH [171434]: Preliminary Local Storm Report

NWUS55 KPIH 171434
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
734 AM MST MON DEC 17 2012

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

0731 AM SNOW 1 W VICTOR 43.60N 111.13W
12/17/2012 E3.0 INCH TETON ID TRAINED SPOTTER

ESTIMATED SNOWFALL DUE STRONG WINDS AND DRIFTING. DRIFTS
RANGE FROM 1 - 2 FEET AND NO KNOWN ROAD CLOSURES. CURRENT
TEMP 23F.


&&

$$

GWICKLUN

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KFSD [171424]: Preliminary Local Storm Report

NWUS53 KFSD 171424
LSRFSD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
824 AM CST MON DEC 17 2012

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

0800 AM SNOW SIOUX FALLS 43.54N 96.73W
12/17/2012 M1.0 INCH MINNEHAHA SD OFFICIAL NWS OBS


&&

$$

CJANSEN

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KMSO [171422]: Preliminary Local Storm Report

NWUS55 KMSO 171422
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
721 AM MST MON DEC 17 2012

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

0630 AM SNOW 1 NNW EVARO 47.04N 114.10W
12/17/2012 M0.9 INCH MISSOULA MT MESONET

REPORTED AT COCORAHS STATION 5745C SNOW
DURATION 24 HOURS

&&

$$

IRIS SYSTEM

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KMSO [171422]: Preliminary Local Storm Report

NWUS55 KMSO 171422
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
721 AM MST MON DEC 17 2012

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

0645 AM SNOW 3 ENE BIGFORK 48.07N 114.01W
12/17/2012 M0.6 INCH FLATHEAD MT MESONET

REPORTED AT COCORAHS STATION 0071H SNOW
DURATION 24 HOURS

&&

$$

IRIS SYSTEM

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KMSO [171422]: Preliminary Local Storm Report

NWUS55 KMSO 171422
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
721 AM MST MON DEC 17 2012

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

0700 AM SNOW 3 SSE MAY 44.57N 113.90W
12/17/2012 M1.0 INCH LEMHI ID MESONET

REPORTED AT COOP STATION MAYI1 SNOW DURATION
24 HOURS

&&

$$

IRIS SYSTEM

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KMSO [171421]: Preliminary Local Storm Report

NWUS55 KMSO 171421
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
721 AM MST MON DEC 17 2012

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

0620 AM SNOW 1 W COLUMBIA FALLS 48.37N 114.20W
12/17/2012 M2.0 INCH FLATHEAD MT MESONET

REPORTED AT COCORAHS STATION 0066H SNOW
DURATION 24 HOURS

&&

$$

IRIS SYSTEM

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KSEW [171420]: Preliminary Local Storm Report...corrected

NWUS56 KSEW 171420
LSRSEW

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SEATTLE WA
620 AM PST MON DEC 17 2012

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

0411 AM TSTM WND GST HOQUIAM 46.98N 123.89W
12/17/2012 M60.00 MPH GRAYS HARBOR WA ASOS

0449 AM NON-TSTM WND GST SEA-TAC 47.44N 122.30W
12/17/2012 M59.00 MPH KING WA ASOS


&&

$$

WWW.WEATHER.GOV

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KSEW [171419]: Preliminary Local Storm Report

NWUS56 KSEW 171419
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
619 AM PST MON DEC 17 2012

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

0449 AM NON-TSTM WND GST SEA-TAC 47.44N 122.30W
12/17/2012 M59 MPH KING WA ASOS


&&

$$

WWW.WEATHER.GOV

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KMSO [171416]: Preliminary Local Storm Report

NWUS55 KMSO 171416
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
715 AM MST MON DEC 17 2012

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

0530 AM HEAVY SNOW 5 NW EAST PORTAL 47.45N 115.70W
12/17/2012 U6.0 INCH MINERAL MT PUBLIC

6 INCHES OF SNOW SINCE CLOSING LAST EVENING
AT LOOKOUT PASS SKI AREA. HEAVY SNOW
DURATION 12 HOURS

&&

$$

IRIS SYSTEM

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KPDT [171403]: Preliminary Local Storm Report

NWUS56 KPDT 171403
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
603 AM PST MON DEC 17 2012

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

0515 AM NON-TSTM WND GST PASCO 46.25N 119.13W
12/17/2012 M70 MPH FRANKLIN WA MESONET

PASCO TRI CITIES AIRPORT.


&&

$$

MVESCIO

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KPIH [171400]: Preliminary Local Storm Report

NWUS55 KPIH 171400
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
700 AM MST MON DEC 17 2012

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

0658 AM HEAVY SNOW 4 NW BELLEVUE 43.52N 114.31W
12/17/2012 M8.0 INCH BLAINE ID TRAINED SPOTTER

OVERNIGHT SNOWFALL.


&&

$$

GWICKLUN

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KPDT [171357]: Preliminary Local Storm Report

NWUS56 KPDT 171357
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
557 AM PST MON DEC 17 2012

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

0459 AM NON-TSTM WND GST BENTON CITY 46.27N 119.49W
12/17/2012 M83 MPH BENTON WA MESONET


&&

$$

MVESCIO

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KPDT [171353]: Preliminary Local Storm Report

NWUS56 KPDT 171353
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
553 AM PST MON DEC 17 2012

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

0538 AM NON-TSTM WND GST DAYTON 46.32N 117.98W
12/17/2012 M55 MPH COLUMBIA WA MESONET


&&

$$

MVESCIO

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KPDT [171342]: Preliminary Local Storm Report

NWUS56 KPDT 171342
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
542 AM PST MON DEC 17 2012

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

0500 AM NON-TSTM WND GST 1 NW RICHLAND 46.30N 119.30W
12/17/2012 M76 MPH BENTON WA MESONET

RICHLAND AIRPORT AWOS.


&&

$$

MVESCIO

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KPDT [171335]: Preliminary Local Storm Report

NWUS56 KPDT 171335
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
535 AM PST MON DEC 17 2012

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

0446 AM NON-TSTM WND GST 3 WNW KENNEWICK 46.22N 119.23W
12/17/2012 M63 MPH BENTON WA MESONET


&&

$$

MVESCIO

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KPDT [171320]: Preliminary Local Storm Report...corrected

NWUS56 KPDT 171320
LSRPDT

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OR
520 AM PST MON DEC 17 2012

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

0856 PM NON-TSTM WND DMG 4 NE KENNEWICK 46.25N 119.11W
12/16/2012 FRANKLIN WA TRAINED SPOTTER

SHINGLES OFF ROOF


&&

$$

MVESCIO

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KPDT [171317]: Preliminary Local Storm Report

NWUS56 KPDT 171317
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
517 AM PST MON DEC 17 2012

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

0456 AM NON-TSTM WND GST RUGGS 45.26N 119.69W
12/17/2012 M60 MPH MORROW OR MESONET


&&

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MVESCIO

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KPDT [171313]: Preliminary Local Storm Report

NWUS56 KPDT 171313
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
512 AM PST MON DEC 17 2012

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

0458 AM NON-TSTM WND DMG 4 NE KENNEWICK 46.25N 119.11W
12/17/2012 FRANKLIN WA TRAINED SPOTTER

SHINGLES OFF ROOF

0457 AM NON-TSTM WND GST WEST PASCO 46.25N 119.18W
12/17/2012 U0 MPH FRANKLIN WA PUBLIC

NO POWER IN WEST PASCO.


&&

$$

MVESCIO

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KPDT [171301]: Preliminary Local Storm Report

NWUS56 KPDT 171301
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
501 AM PST MON DEC 17 2012

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

0453 AM NON-TSTM WND GST PASCO 46.25N 119.13W
12/17/2012 M62 MPH FRANKLIN WA MESONET

PASCO TRI CITIES AIRPORT.


&&

$$

MVESCIO

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KOTX [171259]: Preliminary Local Storm Report

NWUS56 KOTX 171259
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
459 AM PST MON DEC 17 2012

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

1115 AM HEAVY SNOW 2 NW NAPLES 48.59N 116.42W
12/16/2012 M7.2 INCH BOUNDARY ID TRAINED SPOTTER

7.25 STORM TOTAL SNOW. BOUNDARY SPOTTER 52.


&&

$$

FLIEHMAN

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KPDT [171254]: Preliminary Local Storm Report

NWUS56 KPDT 171254
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
454 AM PST MON DEC 17 2012

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

0400 AM NON-TSTM WND GST RICHLAND 46.29N 119.29W
12/17/2012 M59 MPH BENTON WA MESONET

RICHLAND AIRPORT.

0400 AM NON-TSTM WND GST 5 W RICHLAND 46.28N 119.40W
12/17/2012 M60 MPH BENTON WA MESONET


&&

$$

MVESCIO

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 171244
SWODY1
SPC AC 171241

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0641 AM CST MON DEC 17 2012

VALID 171300Z - 181200Z

...THERE IS A SLGT RISK OF SVR TSTMS SERN AL/FL PANHANDLE TO SRN/ERN
SC...

...THERE IS A SLGT RISK OF SVR TSTMS PORTIONS NRN MID TN TO OH
VALLEY REGION...

...SYNOPSIS...
PROGRESSIVE UPPER-AIR PATTERN FCST THROUGH REMAINDER OF PERIOD.
SERIES OF SHORTWAVE PERTURBATIONS WILL CONTRIBUTE TO EWD SHIFT AND
VERY GRADUAL DEAMPLIFICATION OF SYNOPTIC TROUGHING NOW OVER CENTRAL
CONUS. ONE SHORTWAVE TROUGH -- NOW EXTENDING FROM WRN OZARKS REGION
SSWWD ACROSS CENTRAL/S-CENTRAL TX -- SHOULD SHIFT EWD TO MIDDLE/ERN
TN...AL...AND NWRN GULF BY 00Z...BEFORE WEAKENING AND MOVING
OFFSHORE CAROLINAS DURING 06-12Z TIME FRAME. CLOSELY FOLLOWING THAT
ON THE N END IS SEPARATE PERTURBATION NOW EVIDENT IN MOISTURE
CHANNEL IMAGERY OVER PORTIONS KS/NEB. THIS FEATURE SHOULD MOVE TO
NEAR MO/IL BORDER BY 00Z...THEN CENTRAL APPALACHIANS BY END OF
PERIOD.

AT SFC...EXTENSIVE CONVECTION AND PRECIP FROM PRIOR DAY REINFORCED
PRE-EXISTING/RESIDUAL BAROCLINIC ZONE VIA OUTFLOW...SHIFTING IT SWD
ACROSS NRN GULF. BOUNDARY WAS ANALYZED AT 11Z FROM EXTREME SERN GA
WSWWD PAST TLH TO ABOUT 40 S VPS...TO INFLECTION POINT ABOUT 40 S
MOB...THEN SWWD ACROSS PENINSULAR PLAQUEMINES PARISH LA...TO NEAR
COASTAL TERREBONNE/ST MARY PARISHES. INLAND RETREAT AND CHARACTER
OF THIS BOUNDARY ACROSS SERN CONUS WILL BE MAJOR FACTOR IN SERN
CONUS SVR POTENTIAL TODAY--MORE DETAILS BELOW.

FARTHER NW...FRONTAL-WAVE LOW SHOULD MOVE NEWD GENERALLY UP OH RIVER
TODAY...REACHING SRN OH/SWRN PA REGION BY 00Z THEN WRN NY AROUND
12Z. ACCOMPANYING WEAK COLD FRONT SHOULD REACH NRN/WRN AL AND
EXTREME SERN PORTIONS MS/LA BY 00Z...THEN COASTAL PLAIN OR COAST OF
CAROLINAS AND SERN GA NEAR END OF PERIOD.

...SERN CONUS...
COMPLEX AND SOMEWHAT CONDITIONAL SCENARIO APPEARS HERE...WITH
GREATEST SVR THREAT PROBABLY MANIFEST AS DAMAGING GUSTS AND PERHAPS
A TORNADO OR TWO THIS AFTERNOON INTO EVENING. WHILE MID-UPPER FLOW
AND DEEP SHEAR WILL BE STG OVER ENTIRE REGION...MRGL INSTABILITY AND
WEAK LAPSE RATES--EVEN IN WARM SECTOR--SHOULD KEEP PRIMARY SVR
THREAT INVOF BOUNDARY...WHICH ITSELF PRESENTS SOME UNCERTAINTIES
ATTM.

COLD FRONTAL ZONE WILL BE CHARACTERIZED BY GRADUAL WIND SHIFT...WITH
VEERING WARM-SECTOR FLOW TO ITS E. AS SUCH...FRONTAL CONVERGENCE
WILL BE VERY LIMITED OVER THIS REGION...AND PRIMARY CONVECTIVE/SVR
CONCERN SHOULD BE AHEAD OF FRONT. PREFRONTAL BOUNDARY SHOULD MOVE
INLAND THIS MORNING AND BECOME MORE SHALLOW...SOME SEGMENTS OF IT
PERHAPS MIXING AWAY AMIDST SFC DIABATIC HEATING ON BOTH SIDES. THIS
PROCESS SHOULD ALLOW DESTABILIZING AIR MASS ACROSS PORTIONS SERN
AL...GA...FL PANHANDLE AND SC...THROUGH COMBINATION OF SFC HEATING
AND BOUNDARY-LAYER THETAE ADVECTION.

NWD EXTENT OF THIS DESTABILIZATION WILL BE AFFECTED BY ONGOING PLUME
OF MIXED CONVECTIVE/STRATIFORM PRECIP FROM SERN LA NEWD ACROSS
CENTRAL/SRN AL...FCST TO SPREAD/SHIFT NEWD OVER PORTIONS CENTRAL/NRN
GA/SC. SRN EDGE OF PRECIP PLUME MAY RE-ALIGN PRIMARY BAROCLINIC
ZONE WSW-ENE OR SW-NE WITH TIME...ESPECIALLY AS HIGHER THETAE
BOUNDARY LAYER DEVELOPS/SPREADS INLAND. AS SUCH...FAVORABLE
DESTABILIZATION FOR EFFECTIVELY SFC-BASED PARCELS APPEARS LESS
PROBABLE OVER NRN PORTIONS AL/GA...ERN TN AND WRN/UPSTATE SC. THIS
PART OF SVR OUTLOOK ACCORDINGLY HAS BEEN SEPARATED FROM KY LOBE.
BULK OF CONVECTION AND QPF SIGNAL APPARENT IN PROGS LIKELY WILL
REMAIN N OF THAT BOUNDARY OVER COOL LOW-LEVEL AIR MASS...REINFORCING
ITS EDGE OVER PORTIONS CENTRAL GA AND CENTRAL OR SRN SC. ALONG THAT
BOUNDARY...RELATIVE MAX IN LIFT AND VERTICAL SHEAR IS EVIDENT IN
MODIFIED FCST SOUNDINGS...WITH 40-50 KT EFFECTIVE SHEAR
MAGNITUDE...200-300 J/KG EFFECTIVE SRH...AND 30-40 KT 0-1 KM SHEAR
MAGNITUDES POSSIBLE. THIS COULD SUPPORT EITHER LEWP/BOW OR EMBEDDED
SUPERCELL EVOLUTIONS.

SVR POTENTIAL IS EXPECTED TO DIMINISH MARKEDLY BY EARLY-MID EVENING
AS BOUNDARY LAYER COOLS AND WINDS THEREIN VEER AHEAD OF COLD FRONT.

...NRN MID TN TO OH VALLEY REGION...
SVR POTENTIAL APPEARS MRGL BUT ADEQUATE TO MAINTAIN HAIL-DRIVEN
CATEGORICAL RISK FOR NOW. EXPECT VERTICAL JUXTAPOSITION OF DIABATIC
HEATING WITH PROGRESSIVELY STRONGER MID-UPPER DCVA/COOLING AHEAD OF
SHORTWAVES THROUGH AFTERNOON. IN CONJUNCTION WITH MRGL MOISTURE --
E.G. SFC DEW POINTS LOW-MID 50S F -- AIR MASS SHOULD DESTABILIZE
BEHIND ONGOING SHOWERS OVER THIS REGION...REDUCING CINH ENOUGH FOR
TSTMS TO FORM NEAR SFC LOW AND ACCOMPANYING FRONT. MIDLEVEL LAPSE
RATES SHOULD STEEPEN TO AROUND 7.5 DEG C/KM...SUPPORTING MLCAPE IN
300-800 J/KG RANGE. EFFECTIVE SHEAR MAGNITUDES 35-45 KT ARE
POSSIBLE...MOSTLY RELATED TO PRESENCE OF STG MID-UPPER WINDS GIVEN
WEAKNESS OF NEAR-SFC FLOW. RISK SHOULD DIMINISH RAPIDLY AFTER 00Z.

..EDWARDS/ROGERS.. 12/17/2012

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KPDT [171236]: Preliminary Local Storm Report

NWUS56 KPDT 171236
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
436 AM PST MON DEC 17 2012

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

1030 PM NON-TSTM WND GST ECHO 45.74N 119.19W
12/16/2012 M54.00 MPH UMATILLA OR MESONET

0305 AM NON-TSTM WND GST 5 W COLLEGE PLACE 46.05N 118.50W
12/17/2012 M55.00 MPH WALLA WALLA WA MESONET

0400 AM NON-TSTM WND GST 3 NNE KENNEWICK 46.24N 119.14W
12/17/2012 M55.00 MPH FRANKLIN WA TRAINED SPOTTER

SEVERAL GUSTS ABOVE 55 MPH.


&&

$$

MVESCIO

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KMFR [171230]: Preliminary Local Storm Report

NWUS56 KMFR 171230
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
429 AM PST MON DEC 17 2012

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

0118 AM NON-TSTM WND GST 7 W LAKEVIEW 42.19N 120.48W
12/17/2012 M46 MPH LAKE OR PUBLIC

BLOWING AND DRIFTING SNOW.

&&

$$

IRIS SYSTEM

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KMFR [171228]: Preliminary Local Storm Report

NWUS56 KMFR 171228
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
428 AM PST MON DEC 17 2012

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

1206 AM NON-TSTM WND GST 3 NE VALLEY FALLS 42.37N 120.25W
12/17/2012 M74 MPH LAKE OR PUBLIC



&&

$$

IRIS SYSTEM

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KPQR [171227]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 171227
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
427 AM PST MON DEC 17 2012

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

0223 AM NON-TSTM WND DMG VERNONIA 45.86N 123.18W
12/17/2012 COLUMBIA OR MESONET

REPORTS OF SPOTTY POWER OUTAGES ACROSS NORTH COAST RANGE.


0223 AM NON-TSTM WND GST 23 WSW CAPE DISAPPOINTM 46.12N 124.50W
12/17/2012 M60.00 MPH PZZ270 OR BUOY

WEST WIND SUSTAINED 40 TO 45 MPH. GUST TO 60 MPH.

0223 AM NON-TSTM WND DMG EUGENE 44.05N 123.11W
12/17/2012 LANE OR UTILITY COMPANY

CONTINUED SCATTERED POWER OUTAGES ACROSS SOUTH WILLAMETTE
VALLEY...INCLUDING EUGENE...SPRINGFIELD AND JUNCTION
CITY.

0118 AM NON-TSTM WND DMG 10 S PORTLAND AIRPORT 45.45N 122.60W
12/17/2012 CLACKAMAS OR UTILITY COMPANY

AT 1 AM...PGE REPORTING ABOUT 10000 CUSTOMERS IN THE
PORTLAND METRO AREA WITHOUT POWER.

0118 AM NON-TSTM WND DMG EUGENE 44.05N 123.11W
12/17/2012 LANE OR UTILITY COMPANY

AT 1 AM...LANE ELECTRIC REPORTING ABOUT 12000 CUSTOMERS
WITHOUT POWER THIS MORNING.

1256 AM NON-TSTM WND DMG 8 E PORTLAND AIRPORT 45.59N 122.43W
12/17/2012 CLARK WA NWS EMPLOYEE

OCCASIONAL POWER FLICKERS AT NWS OFFICE. STILL HAVE
POWER.

1243 AM NON-TSTM WND DMG PORTLAND AIRPORT 45.59N 122.60W
12/17/2012 MULTNOMAH OR UTILITY COMPANY

AS OF 1230 AM...1100 PGE CUSTOMERS IN MULTNOMAH COUNTY
WITHOUT POWER.

1243 AM NON-TSTM WND DMG HILLSBORO 45.53N 122.94W
12/17/2012 WASHINGTON OR UTILITY COMPANY

AS OF 1230 AM...2084 PGE CUSTOMERS WITHOUT POWER IN
WASHINGTON COUNTY.

1243 AM NON-TSTM WND DMG CLACKAMAS 45.41N 122.55W
12/17/2012 CLACKAMAS OR UTILITY COMPANY

AS OF 1230 AM...PGE REPORTING OVER 3100 CUSTOMERS IN
CLACKAMAS COUNTY WITHOUT POWER.


&&

$$

CROCKEY

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KPDT [171222]: Preliminary Local Storm Report

NWUS56 KPDT 171222
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
422 AM PST MON DEC 17 2012

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

0350 AM NON-TSTM WND GST 19 NNW WEST RICHLAND 46.57N 119.60W
12/17/2012 M66 MPH BENTON WA MESONET

AT HANFORD.


&&

$$

MVESCIO

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KSEW [171213]: Preliminary Local Storm Report

NWUS56 KSEW 171213
LSRSEW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
413 AM PST MON DEC 17 2012

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

0411 AM HIGH SUST WINDS HOQUIAM 46.98N 123.89W
12/17/2012 M0 MPH GRAYS HARBOR WA ASOS

60 MPH WIND GUST


&&

$$

WWW.WEATHER.GOV

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KPDT [171210]: Preliminary Local Storm Report

NWUS56 KPDT 171210
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
410 AM PST MON DEC 17 2012

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

0356 AM NON-TSTM WND GST 13 WNW BICKLETON 46.08N 120.54W
12/17/2012 M60.00 MPH YAKIMA WA MESONET

HIGHBRIDGE RAWS.


&&

$$

MVESCIO

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KMFR [171204]: Preliminary Local Storm Report

NWUS56 KMFR 171204
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
404 AM PST MON DEC 17 2012

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

1135 PM SNOW WSW SILVER LAKE 43.13N 121.05W
12/16/2012 M4.0 INCH LAKE OR TRAINED SPOTTER

24 HOUR AMOUNT. ALSO REPORTED STRONG WIND GUSTS TO 40
MPH.


&&

$$

SPILDE

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KPDT [171204]: Preliminary Local Storm Report

NWUS56 KPDT 171204
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
403 AM PST MON DEC 17 2012

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

0315 AM NON-TSTM WND GST 12 NW WEST RICHLAND 46.47N 119.54W
12/17/2012 M69 MPH BENTON WA MESONET

MID HANFORD MESONET.

0341 AM NON-TSTM WND GST BENTON CITY 46.27N 119.49W
12/17/2012 M60 MPH BENTON WA MESONET

45G60.

0315 AM NON-TSTM WND GST 10 NNW BENTON CITY 46.39N 119.59W
12/17/2012 M100 MPH BENTON WA MESONET

RATTLE SNAKE MOUNTAIN

0315 AM NON-TSTM WND GST 22 NE SUNNYSIDE 46.58N 119.73W
12/17/2012 M58 MPH BENTON WA MESONET

YAKIMA BARRICADE MESONET.

0315 AM NON-TSTM WND GST 14 NNW WEST RICHLAND 46.49N 119.55W
12/17/2012 M72 MPH BENTON WA MESONET


&&

$$

MVESCIO

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KPDT [171116]: Preliminary Local Storm Report

NWUS56 KPDT 171116
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
316 AM PST MON DEC 17 2012

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

0305 AM NON-TSTM WND GST 4 WSW COLLEGE PLACE 46.03N 118.46W
12/17/2012 M62 MPH WALLA WALLA WA MESONET

MESONET GUST.


&&

$$

MVESCIO

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KPDT [171052]: Preliminary Local Storm Report

NWUS56 KPDT 171052
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
252 AM PST MON DEC 17 2012

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

0215 AM NON-TSTM WND GST 12 NW WEST RICHLAND 46.47N 119.54W
12/17/2012 M60 MPH BENTON WA MESONET

MID HANFORD MESONET SITE.


&&

$$

MVESCIO

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KPDT [171045]: Preliminary Local Storm Report

NWUS56 KPDT 171045
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
244 AM PST MON DEC 17 2012

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

0130 AM NON-TSTM WND GST 14 NNW WEST RICHLAND 46.49N 119.55W
12/17/2012 M58 MPH BENTON WA MESONET

HANFORD ARMY LOOP MESONET.


&&

$$

MVESCIO

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KPDT [171031]: Preliminary Local Storm Report

NWUS56 KPDT 171031
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
231 AM PST MON DEC 17 2012

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

0210 AM NON-TSTM WND GST PASCO 46.25N 119.13W
12/17/2012 E60.00 MPH FRANKLIN WA TRAINED SPOTTER

WINDS ESTIMATED TO AT LEAST 60 MPH USING BEAUFORT SCALE
ALONG ROAD 100 IN PASCO. TRAINED SPOTTER RELOCATED FROM
WALLA WALLA COUNTY.


&&

$$

MVESCIO

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KPQR [171025]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 171025
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
225 AM PST MON DEC 17 2012

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

0223 AM NON-TSTM WND DMG VERNONIA 45.86N 123.18W
12/17/2012 COLUMBIA OR MESONET

REPORTS OF SPOTTY POWER OUTAGES ACROSS NORTH COAST RANGE.


0223 AM NON-TSTM WND GST 23 WSW CAPE DISAPPOINTM 46.12N 124.50W
12/17/2012 M60.00 MPH PZZ270 OR BUOY

WEST WIND SUSTAINED 40 TO 45 MPH. GUST TO 60 MPH.

0223 AM NON-TSTM WND DMG EUGENE 44.05N 123.11W
12/17/2012 LANE OR UTILITY COMPANY

CONTINUED SCATTERED POWER OUTAGES ACROSS SOUTH WILLAMETTE
VALLEY...INCLUDING EUGENE...SPRINGFIELD AND JUNCTION
CITY.

0118 AM NON-TSTM WND DMG 10 S PORTLAND AIRPORT 45.45N 122.60W
12/17/2012 CLACKAMAS OR UTILITY COMPANY

AT 1 AM...PGE REPORTING ABOUT 10000 CUSTOMERS IN THE
PORTLAND METRO AREA WITHOUT POWER.

0118 AM NON-TSTM WND DMG EUGENE 44.05N 123.11W
12/17/2012 LANE OR UTILITY COMPANY

AT 1 AM...LANE ELECTRIC REPORTING ABOUT 12000 CUSTOMERS
WITHOUT POWER THIS MORNING.

1256 AM NON-TSTM WND DMG 8 E PORTLAND AIRPORT 45.59N 122.43W
12/17/2012 CLARK WA NWS EMPLOYEE

OCCASIONAL POWER FLICKERS AT NWS OFFICE. STILL HAVE
POWER.

1243 AM NON-TSTM WND DMG PORTLAND AIRPORT 45.59N 122.60W
12/17/2012 MULTNOMAH OR UTILITY COMPANY

AS OF 1230 AM...1100 PGE CUSTOMERS IN MULTNOMAH COUNTY
WITHOUT POWER.

1243 AM NON-TSTM WND DMG HILLSBORO 45.53N 122.94W
12/17/2012 WASHINGTON OR UTILITY COMPANY

AS OF 1230 AM...2084 PGE CUSTOMERS WITHOUT POWER IN
WASHINGTON COUNTY.

1243 AM NON-TSTM WND DMG CLACKAMAS 45.41N 122.55W
12/17/2012 CLACKAMAS OR UTILITY COMPANY

AS OF 1230 AM...PGE REPORTING OVER 3100 CUSTOMERS IN
CLACKAMAS COUNTY WITHOUT POWER.

1215 AM NON-TSTM WND DMG INDEPENDENCE 44.86N 123.19W
12/17/2012 POLK OR UTILITY COMPANY

POWER OUTAGES...NOW AT 2800 CUSTOMERS IN INDEPENDENCE
AREA WITHOUT POWER.

1214 AM NON-TSTM WND DMG 5 S DEPOE BAY 44.74N 124.06W
12/17/2012 LINCOLN OR DEPT OF HIGHWAYS

TREE OR TREE DEBRIS ON HIGHWAY 101.

1129 PM NON-TSTM WND GST 4 WNW ASTORIA 46.21N 123.90W
12/16/2012 M63.00 MPH PZZ210 WA MESONET

SUSTAINED 55 MPH...WITH GUSTS 63 MPH.

1129 PM NON-TSTM WND DMG CAPE DISAPPOINTMENT 46.27N 124.08W
12/16/2012 PACIFIC WA MESONET

SUSTAINED 50 TO 55 MPH...WITH GUSTS 65 TO 70 MPH.

1127 PM NON-TSTM WND DMG 3 N MIST 46.04N 123.25W
12/16/2012 COLUMBIA OR DEPT OF HIGHWAYS

TREE OR TREE DEBRIS AFFECTING 1 LANE OF HWY 47 AT
MILEPOST 9.

1112 PM NON-TSTM WND GST 2 SSW NEWPORT 44.61N 124.07W
12/16/2012 M62.00 MPH LINCOLN OR C-MAN STATION

SUSTAINED WEST TO SOUTHWEST 46 MPH. GUSTS 62 MPH.

1102 PM NON-TSTM WND DMG 1 N JEFFERSON 44.73N 123.00W
12/16/2012 MARION OR DEPT OF HIGHWAYS

DOWNED TREE BRANCHES AND DEBRIS ON HIGH 164 NEAR MILEPOST
4.

1102 PM NON-TSTM WND DMG 8 SW PORTLAND AIRPORT 45.51N 122.72W
12/16/2012 MULTNOMAH OR BROADCAST MEDIA

SOME DOWNED SMALL TO MEDIUM TREES.

1055 PM NON-TSTM WND GST 1 SE TILLAMOOK 45.45N 123.83W
12/16/2012 M65.00 MPH TILLAMOOK OR TRAINED SPOTTER

1036 PM NON-TSTM WND DMG 14 S COTTAGE GROVE 43.60N 123.06W
12/16/2012 LANE OR DEPT OF HIGHWAYS

DOWNED TREE BRANCES AND DEBRIS AFFECTING 1 LANE AND
SHOULDER ON INTERSTATE 5.

1035 PM NON-TSTM WND GST 4 S TILLAMOOK 45.40N 123.84W
12/16/2012 M60.00 MPH TILLAMOOK OR AWOS

SUSTAINED SOUTH TO SOUTHWEST WIND 35 TO 40 MPH. GUSTS 60
MPH.


&&

$$

CROCKEY

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MESO: Mesoscale Discussion 2168

ACUS11 KWNS 171017
SWOMCD
SPC MCD 171016
FLZ000-ALZ000-MSZ000-LAZ000-171215-

MESOSCALE DISCUSSION 2168
NWS STORM PREDICTION CENTER NORMAN OK
0416 AM CST MON DEC 17 2012

AREAS AFFECTED...FAR SERN MS/SWRN-SOUTH CENTRAL AL/WRN FL PANHANDLE

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 171016Z - 171215Z

PROBABILITY OF WATCH ISSUANCE...40 PERCENT

SUMMARY...A SEVERE WEATHER THREAT /DAMAGING WINDS AND/OR A TORNADO/
MAY BE DEVELOPING EARLY THIS MORNING ALONG THE COASTAL AREAS OF SERN
MS...SWRN AL AND THE WRN FL PANHANDLE...WITH POTENTIAL TO MOVE A
LITTLE FARTHER INLAND OVER SWRN AL/WRN FL PANHANDLE. WW ISSUANCE IS
AT 40 PERCENT SINCE UNCERTAINTY REMAINS IN THE OVERALL STORM
COVERAGE INTO THE MORNING.

DISCUSSION...TRENDS DURING THE OVERNIGHT/EARLY THIS MORNING SHOWED A
PORTION OF THE CONVECTIVE OUTFLOW BOUNDARY THAT HAD MOVED INTO THE
NRN GULF OF MEXICO HAS RETURNED NWD...AND WAS IMPINGING UPON THE
COASTAL AREAS OF FAR SERN MS/SWRN AL /DAUPHIN ISLAND VICINITY/.
REGIONAL RADAR IMAGERY SHOWED CONVECTIVE CELLS MOVING INTO SRN
MOBILE COUNTY FROM OFFSHORE...WITH LIGHTNING ALSO DETECTED FARTHER
SSW OVER THE CHANDELEUR ISLANDS...WHERE A TRAILING PORTION OF THE
OUTFLOW BOUNDARY HAD BECOME ORIENTED NNE-SSW ALONG AND OFFSHORE OF
SERN LA.

SWLY MIDLEVEL WINDS OVER THE LOWER MS VALLEY-CENTRAL GULF COAST
STATES WILL CONTINUE TO STRENGTHEN THIS MORNING AS A PROGRESSIVE
SHORTWAVE TROUGH...CURRENTLY MOVING EWD ACROSS THE OZARKS-ARKLATEX
REGION PER MOISTURE CHANNEL IMAGERY...BECOMES NEGATIVELY TILTED.
THESE WINDS AND 30-35 KT SSWLY LLJ SUPPORT BULK SHEAR OF 40-55 KT
FOR ORGANIZED STORMS...WHILE EFFECTIVE SRH OF 100-200 M2/S2 INVOF
THE NWD MOVING BOUNDARY INTO THE DISCUSSION AREA WILL SUPPORT THE
POTENTIAL FOR LOW LEVEL ROTATION/AT LEAST A BRIEF TORNADO. MUCAPE
OF 200-400 J/KG N OF THE RETREATING BOUNDARY AND AOA 500 J/KG IN THE
WARM SECTOR SHOULD REMAIN MEAGER THROUGH THE MORNING AND WILL BE THE
MAIN LIMITING FACTOR FOR GREATER TSTM/SVR COVERAGE. AN ADDITIONAL
THREAT FOR AT LEAST A FEW STRONG TO SEVERE STORMS COULD DEVELOP
ALONG THE TRAILING EXTENT OF OVERNIGHT ELEVATED CONVECTION THAT
SHOULD MOVE INTO SWRN AL BETWEEN 11-12Z.

..PETERS/EDWARDS.. 12/17/2012

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

ATTN...WFO...TAE...MOB...LIX...

LAT...LON 29638923 30718891 31328798 31258688 30858631 30138664
30068723 29768820 29458862 29638923

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 170955
SWOD48
SPC AC 170954

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0354 AM CST MON DEC 17 2012

VALID 201200Z - 251200Z

...DISCUSSION...
DAY 4...PROGRESSIVE SHORTWAVE TROUGH WILL ADVANCE THROUGH THE ERN
U.S. THURSDAY...WHILE ATTENDANT SFC LOW DEEPENS AS IT LIFTS NEWD
INTO THE GREAT LAKES. TRAILING COLD FRONT WILL SWEEP THROUGH THE OH
VALLEY AND SERN STATES BEFORE MOVING OFF ATLANTIC SEABOARD LATER
THURSDAY NIGHT. SPEED OF THIS SYSTEM WILL LIMIT DEGREE OF LOW LEVEL
MOISTURE RECOVERY WITHIN PRE-FRONTAL WARM SECTOR...WHICH COMBINED
WITH WEAK LAPSE RATES SHOULD RESULT IN MINIMAL INSTABILITY.
NEVERTHELESS...A FORCED BAND OF LOW TOPPED CONVECTION WILL LIKELY
ACCOMPANY THE FRONT THROUGH THE TN VALLEY AND SERN STATES. GIVEN THE
STRENGTH OF THE DEEP LAYER WIND PROFILES AND 50+ KT FLOW JUST ABOVE
THE SFC...SOME OF THIS ACTIVITY MIGHT BECOME CAPABLE OF PRODUCING
STRONG TO DAMAGING WIND GUSTS. HOWEVER...THE WEAK THERMODYNAMIC
ENVIRONMENT WILL PROBABLY LIMIT OVERALL SEVERE POTENTIAL. WHILE AT
LEAST LOW SEVERE PROBABILITIES MAY NEED TO BE REINTRODUCED IN LATER
UPDATES...OVERALL CONFIDENCE IN A MORE ROBUST ORGANIZED SEVERE EVENT
IS NOT SUFFICIENT TO MAINTAIN A 30% COVERAGE AREA AT THIS TIME.

DAYS 5-8...SEVERE POTENTIAL IS EXPECTED TO REMAIN LOW THROUGH AT
LEAST DAY 7 AS DRY AIR ASSOCIATED WITH CP HIGH PRESSURE OVERSPREADS
THE GULF WITH LIMITED MOISTURE RETURN DURING MOST OF THIS TIME
FRAME.

..DIAL.. 12/17/2012

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KTFX [170945]: Preliminary Local Storm Report

NWUS55 KTFX 170945
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
245 AM MST MON DEC 17 2012

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

1224 AM HIGH SUST WINDS 4 NNE MCALLISTER 45.50N 111.70W
12/17/2012 M42 MPH MADISON MT DEPT OF HIGHWAYS

NORRIS HILL DOT MEASURES AVERAGE SUSTAINED WIND OF 42
MPH. WIND GUST OF 53 MPH.


&&

$$

MLV

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KPDT [170912]: Preliminary Local Storm Report

NWUS56 KPDT 170912
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
112 AM PST MON DEC 17 2012

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

0742 PM NON-TSTM WND GST LONG CREEK 44.71N 119.10W
12/16/2012 M55 MPH GRANT OR MESONET


&&

$$

MVESCIO

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KPQR [170857]: Preliminary Local Storm Report

NWUS56 KPQR 170857
LSRPQR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PORTLAND OR
1257 AM PST MON DEC 17 2012

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

1256 AM NON-TSTM WND DMG 8 E PORTLAND AIRPORT 45.59N 122.43W
12/17/2012 CLARK WA NWS EMPLOYEE

OCCASIONAL POWER FLICKERS AT NWS OFFICE. STILL HAVE
POWER.

1243 AM NON-TSTM WND DMG HILLSBORO 45.53N 122.94W
12/17/2012 WASHINGTON OR UTILITY COMPANY

AS OF 1230 AM...2084 PGE CUSTOMERS WITHOUT POWER IN
WASHINGTON COUNTY.

1243 AM NON-TSTM WND DMG PORTLAND AIRPORT 45.59N 122.60W
12/17/2012 MULTNOMAH OR UTILITY COMPANY

AS OF 1230 AM...1100 PGE CUSTOMERS IN MULTNOMAH COUNTY
WITHOUT POWER.

1243 AM NON-TSTM WND DMG CLACKAMAS 45.41N 122.55W
12/17/2012 CLACKAMAS OR UTILITY COMPANY

AS OF 1230 AM...PGE REPORTING OVER 3100 CUSTOMERS IN
CLACKAMAS COUNTY WITHOUT POWER.

1215 AM NON-TSTM WND DMG INDEPENDENCE 44.86N 123.19W
12/17/2012 POLK OR UTILITY COMPANY

POWER OUTAGES...NOW AT 2800 CUSTOMERS IN INDEPENDENCE
AREA WITHOUT POWER.

1214 AM NON-TSTM WND DMG 5 S DEPOE BAY 44.74N 124.06W
12/17/2012 LINCOLN OR DEPT OF HIGHWAYS

TREE OR TREE DEBRIS ON HIGHWAY 101.

1129 PM NON-TSTM WND DMG CAPE DISAPPOINTMENT 46.27N 124.08W
12/16/2012 PACIFIC WA MESONET

SUSTAINED 50 TO 55 MPH...WITH GUSTS 65 TO 70 MPH.

1129 PM NON-TSTM WND GST 4 WNW ASTORIA 46.21N 123.90W
12/16/2012 M63.00 MPH PZZ210 WA MESONET

SUSTAINED 55 MPH...WITH GUSTS 63 MPH.

1127 PM NON-TSTM WND DMG 3 N MIST 46.04N 123.25W
12/16/2012 COLUMBIA OR DEPT OF HIGHWAYS

TREE OR TREE DEBRIS AFFECTING 1 LANE OF HWY 47 AT
MILEPOST 9.

1112 PM NON-TSTM WND GST 2 SSW NEWPORT 44.61N 124.07W
12/16/2012 M62.00 MPH LINCOLN OR C-MAN STATION

SUSTAINED WEST TO SOUTHWEST 46 MPH. GUSTS 62 MPH.

1102 PM NON-TSTM WND DMG 1 N JEFFERSON 44.73N 123.00W
12/16/2012 MARION OR DEPT OF HIGHWAYS

DOWNED TREE BRANCHES AND DEBRIS ON HIGH 164 NEAR MILEPOST
4.

1102 PM NON-TSTM WND DMG 8 SW PORTLAND AIRPORT 45.51N 122.72W
12/16/2012 MULTNOMAH OR BROADCAST MEDIA

SOME DOWNED SMALL TO MEDIUM TREES.


&&

$$

CROCKEY

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 170820
SWODY3
SPC AC 170818

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0218 AM CST MON DEC 17 2012

VALID 191200Z - 201200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM NERN TX...EXTREME SERN OK
THROUGH THE LOWER MS VALLEY...

...SYNOPSIS...

MODELS HAVE CONVERGED ON SIMILAR SOLUTIONS REGARDING THE SPEED AND
AMPLITUDE OF THE NEXT SIGNIFICANT UPPER TROUGH FORECAST TO AMPLIFY
ACROSS THE SWRN STATES TUESDAY. THIS FEATURE WILL CONTINUE RAPIDLY
EWD THROUGH THE SRN AND CNTRL PLAINS WEDNESDAY AND LOWER MS VALLEY
WEDNESDAY NIGHT. A DEEP CYCLONE WILL DEVELOP IN THE LEE OF ROCKIES
AS EXIT REGION OF UPPER JET ROTATES THROUGH BASE OF THE TROUGH AND
INTO THE SRN HIGH PLAINS. THIS LOW WILL TRACK NEWD THROUGH THE MID
MS VALLEY WEDNESDAY NIGHT. SEWD MOVING POLAR FRONT WILL OVERTAKE THE
PACIFIC FRONT AND SWEEP ACROSS THE SRN PLAINS AND MID-LOWER MS
VALLEY REGIONS. THIS BOUNDARY WILL LIKELY EXTEND FROM THE SFC LOW
OVER IL SWWD INTO MS/LA BY THE END OF THIS PERIOD.

...EXTREME ERN OK...NERN TX THROUGH LOWER MS VALLEY REGION...

PRIMARY LIMITING FACTOR FOR A MORE ROBUST SEVERE EVENT WITH THIS
SYSTEM WILL LIKELY BE VERY WEAK INSTABILITY. COLD FRONT THAT WILL
MOVE OFF THE TX AND LA COASTS MONDAY WILL SHUNT RICHER LOW LEVEL
MOISTURE AT LEAST AS FAR SOUTH AS THE CNTRL GULF. HOWEVER...SLY
BOUNDARY LAYER WINDS WILL INCREASE OVER THE WRN GULF LATER TUESDAY
IN RESPONSE TO DEVELOPING LEE CYCLONE. PARTIALLY MODIFIED GULF AIR
WILL ADVECT THROUGH ERN TX AND THE LOWER MS VALLEY TUESDAY NIGHT
INTO WEDNESDAY WITH NEAR SFC DEWPOINTS INCREASING TO AROUND 60 AS
FAR NORTH AS ARKANSAS AND UPPER 60S NEAR THE TX/LA COASTS. SOME
POTENTIAL ALSO EXISTS FOR LOW CLOUDS TO DEVELOP ALONG THE AXIS OF
MOISTURE RETURN...WHICH IN CONJUNCTION WITH WEAK MID LEVEL LAPSE
RATES MAY SIGNIFICANTLY LIMIT MUCAPE TO AOB 500 J/KG.

LOW TOPPED CONVECTION IS EXPECTED TO FORM BY WEDNESDAY EVENING
WITHIN ZONE OF STRONG FRONTOGENETIC FORCING AND ALONG LEADING EDGE
OF DPVA ALOFT FROM NERN TX THROUGH ERN OK/WRN AR INTO SWRN MO.
DESTABILIZATION WILL REMAIN CONFINED TO A NARROW CORRIDOR IN
VICINITY OF THE PROGRESSIVE FRONT AS DEEPER MESOSCALE ASCENT
OVERTAKES THE MOIST AXIS. MUCH OF THE CONVECTION WILL PROBABLY
PRODUCE LIMITED LIGHTNING DUE TO ITS LOW TOPPED NATURE WITH EL
TEMPERATURES AOA -20C. NEVERTHELESS THE EVOLVING SQUALL LINE WILL BE
EMBEDDED WITHIN STRONG DEEP LAYER WINDS WITH LLJ STRENGTHENING TO
AOA 50 KT. LEWP AND BOWING SEGMENTS CAPABLE OF TRANSFERRING HIGHER
MOMENTUM AIR WITH STRONG TO DAMAGING GUSTS DOWN TO THE SFC WILL BE
THE MAIN THREAT AS ACTIVITY ADVANCES THROUGH THE LOWER MS VALLEY
OVERNIGHT.

HAVE SCALED BACK ON PROBABILITIES FROM DAY 4 WITH ONLY 15% SLIGHT
RISK CATEGORY AT THIS TIME DUE TO THE LIMITING CONSTRAINTS OF THE
EXPECTED MARGINAL THERMODYNAMIC ENVIRONMENT.

..DIAL.. 12/17/2012

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KPDT [170800]: Preliminary Local Storm Report

NWUS56 KPDT 170800
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1200 AM PST MON DEC 17 2012

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

1100 PM NON-TSTM WND GST 9 ESE STANFIELD 45.73N 119.06W
12/16/2012 M58.00 MPH UMATILLA OR MESONET

1140 PM NON-TSTM WND GST 3 N JOSEPH 45.39N 117.23W
12/16/2012 M64.00 MPH WALLOWA OR MESONET

1154 PM HEAVY SNOW 8 SE CLIFFDELL 46.85N 120.95W
12/16/2012 M9.0 INCH YAKIMA WA TRAINED SPOTTER

9 INCHES NEW SNOW SINCE MID AFTERNOON.


&&

$$

MVESCIO

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KPQR [170657]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 170657
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
1057 PM PST SUN DEC 16 2012

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

0315 PM NON-TSTM WND GST NEWPORT 44.63N 124.05W
12/16/2012 M67.00 MPH LINCOLN OR OTHER FEDERAL

HIGH WINDS ON THE YAQUINA BRIDGE, 44 MPH SUSTAINED, 67
MPH GUSTS.

0418 PM NON-TSTM WND GST NEWPORT 44.63N 124.05W
12/16/2012 M62.00 MPH LINCOLN OR OTHER FEDERAL

AIRPORT AT NEWPORT, OR

0424 PM NON-TSTM WND GST GARIBALDI 45.56N 123.91W
12/16/2012 M73.00 MPH TILLAMOOK OR OFFICIAL NWS OBS

0440 PM NON-TSTM WND GST LINCOLN CITY 44.97N 124.01W
12/16/2012 M66.00 MPH LINCOLN OR AMATEUR RADIO

0449 PM NON-TSTM WND GST NEWPORT 44.63N 124.05W
12/16/2012 M72.00 MPH LINCOLN OR OTHER FEDERAL

YAQUINA BRIDGE IN NEWPORT, 60 MPH SUSTAINED AND 72 MPH
GUSTS.

0502 PM NON-TSTM WND GST CLATSOP SPIT 46.22N 124.00W
12/16/2012 M58.00 MPH CLATSOP OR OFFICIAL NWS OBS

0519 PM NON-TSTM WND GST NEWPORT 44.63N 124.05W
12/16/2012 M76.00 MPH LINCOLN OR OTHER FEDERAL

YAQUINA BRIDGE IN NEWPORT, OR

0600 PM NON-TSTM WND GST CAPE DISAPPOINTMENT 46.27N 124.08W
12/16/2012 M84.00 MPH PACIFIC WA OFFICIAL NWS OBS

0600 PM NON-TSTM WND GST LINCOLN CITY 44.97N 124.01W
12/16/2012 M74.00 MPH LINCOLN OR TRAINED SPOTTER

0615 PM NON-TSTM WND DMG 10 NW DALLAS 45.02N 123.46W
12/16/2012 POLK OR AMATEUR RADIO

TREES DOWN ON HIGHWAY 22.

0615 PM NON-TSTM WND DMG KELSO 46.13N 122.89W
12/16/2012 COWLITZ WA COUNTY OFFICIAL

POWER OUTAGES IN NORTH KELSO AND MT BRYNION IN COWLITZ
COUNTY, WA.

0643 PM NON-TSTM WND GST LINCOLN CITY 44.97N 124.01W
12/16/2012 M81.00 MPH LINCOLN OR AMATEUR RADIO

WINDS ATOP A 70 FT TOWER.

0643 PM NON-TSTM WND DMG CORVALLIS 44.57N 123.28W
12/16/2012 BENTON OR UTILITY COMPANY

POWER OUTAGES TO OVER 18,400 CUSTOMERS IN CORVALLIS,
LEBANNON, AND ALBANY, OR.

0643 PM NON-TSTM WND GST 5 S TILLAMOOK 45.38N 123.84W
12/16/2012 M63.00 MPH TILLAMOOK OR AMATEUR RADIO

TIERRA DEL MAR

0700 PM NON-TSTM WND DMG BLODGETT 44.60N 123.52W
12/16/2012 BENTON OR TRAINED SPOTTER

POWER OUTAGE. LARGE TREE BRANCHES BROKEN.

0700 PM NON-TSTM WND GST DALLAS 44.92N 123.31W
12/16/2012 E0.00 MPH POLK OR UTILITY COMPANY

POWER OUTAGES IN POLK COUNTY AFFECTING 115 PEOPLE.

0700 PM NON-TSTM WND DMG OREGON CITY 45.34N 122.60W
12/16/2012 CLACKAMAS OR UTILITY COMPANY

POWER OUTAGE IN CLACKAMAS COUNTY AFFECTING 368 CUSTOMERS.


0700 PM NON-TSTM WND DMG SALEM 44.92N 123.02W
12/16/2012 MARION OR UTILITY COMPANY

POWER OUTAGES IN MARION COUNTY AFFECTING 1305 CUSTOMERS.


0700 PM NON-TSTM WND GST 10 S PORTLAND AIRPORT 45.45N 122.60W
12/16/2012 E0.00 MPH CLACKAMAS OR UTILITY COMPANY

POWER OUTAGES AFFECTING 143 CUSTOMERS IN MULTNOMAH
COUNTY.

0711 PM NON-TSTM WND DMG 6 E TIDEWATER 44.42N 123.78W
12/16/2012 LINCOLN OR DEPT OF HIGHWAYS

DOWNED TREES BLOCKING HIGHWAY 34 AT MILEPOST 16.

0759 PM NON-TSTM WND DMG CORVALLIS 44.57N 123.28W
12/16/2012 BENTON OR DEPT OF HIGHWAYS

WIDESPREAD POWER OUTAGES FROM CORVALLIS TO
LEBANON...ALONG HIGHWAY 20.

0933 PM NON-TSTM WND DMG 1 W HOLLEY 44.35N 122.80W
12/16/2012 LINN OR DEPT OF HIGHWAYS

DOWNED TREES AND POWER LINES HAVE CLOSED HIGHWAY 228 FROM
MILEPOST 16 TO 17.

0934 PM NON-TSTM WND DMG 9 S DALLAS 44.79N 123.31W
12/16/2012 POLK OR DEPT OF HIGHWAYS

POWER LINES DOWN ON HIGHWAY 223 AT MILEPOST 12.5 TO 13.0.


0940 PM NON-TSTM WND DMG 3 S MONROE 44.27N 123.30W
12/16/2012 LANE OR DEPT OF HIGHWAYS

DOWNED POWERLINES AND FIRE CLOSING HIGHWAY 99W.

1015 PM NON-TSTM WND DMG YAMHILL 45.34N 123.18W
12/16/2012 YAMHILL OR DEPT OF HIGHWAYS

DOWNED POWERLINES AT MILEPOST 22.75 IN RURAL POLK COUNTY.


1018 PM NON-TSTM WND DMG 5 W ELSIE 45.87N 123.70W
12/16/2012 CLATSOP OR DEPT OF HIGHWAYS

TREE BRANCES AND/OR DEBRIS ON HIGHWAY 26 AFFECTING BOTH
LANES.

1023 PM NON-TSTM WND GST PACIFIC CITY 45.20N 123.96W
12/16/2012 M61.00 MPH TILLAMOOK OR MESONET

SUSTAINED SOUTH WIND 30 TO 40 MPH. GUSTS 61 MPH.

1035 PM NON-TSTM WND GST 4 S TILLAMOOK 45.40N 123.84W
12/16/2012 M60.00 MPH TILLAMOOK OR AWOS

SUSTAINED SOUTH TO SOUTHWEST WIND 35 TO 40 MPH. GUSTS 60
MPH.

1036 PM NON-TSTM WND DMG 14 S COTTAGE GROVE 43.60N 123.06W
12/16/2012 LANE OR DEPT OF HIGHWAYS

DOWNED TREE BRANCES AND DEBRIS AFFECTING 1 LANE AND
SHOULDER ON INTERSTATE 5.

1055 PM NON-TSTM WND GST 1 SE TILLAMOOK 45.45N 123.83W
12/16/2012 M65.00 MPH TILLAMOOK OR TRAINED SPOTTER


&&

$$

CROCKEY

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KPQR [170654]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 170654
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
1054 PM PST SUN DEC 16 2012

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

0502 PM NON-TSTM WND GST CLATSOP SPIT 46.22N 124.00W
12/16/2012 M58.00 MPH CLATSOP OR OFFICIAL NWS OBS

0519 PM NON-TSTM WND GST NEWPORT 44.63N 124.05W
12/16/2012 M76.00 MPH LINCOLN OR OTHER FEDERAL

YAQUINA BRIDGE IN NEWPORT, OR

0600 PM NON-TSTM WND GST CAPE DISAPPOINTMENT 46.27N 124.08W
12/16/2012 M84.00 MPH PACIFIC WA OFFICIAL NWS OBS

0600 PM NON-TSTM WND GST LINCOLN CITY 44.97N 124.01W
12/16/2012 M74.00 MPH LINCOLN OR TRAINED SPOTTER

0615 PM NON-TSTM WND DMG KELSO 46.13N 122.89W
12/16/2012 COWLITZ WA COUNTY OFFICIAL

POWER OUTAGES IN NORTH KELSO AND MT BRYNION IN COWLITZ
COUNTY, WA.

0615 PM NON-TSTM WND DMG 10 NW DALLAS 45.02N 123.46W
12/16/2012 POLK OR AMATEUR RADIO

TREES DOWN ON HIGHWAY 22.

0643 PM NON-TSTM WND GST 5 S TILLAMOOK 45.38N 123.84W
12/16/2012 M63.00 MPH TILLAMOOK OR AMATEUR RADIO

TIERRA DEL MAR

0643 PM NON-TSTM WND DMG CORVALLIS 44.57N 123.28W
12/16/2012 BENTON OR UTILITY COMPANY

POWER OUTAGES TO OVER 18,400 CUSTOMERS IN CORVALLIS,
LEBANNON, AND ALBANY, OR.

0643 PM NON-TSTM WND GST LINCOLN CITY 44.97N 124.01W
12/16/2012 M81.00 MPH LINCOLN OR AMATEUR RADIO

WINDS ATOP A 70 FT TOWER.

0700 PM NON-TSTM WND DMG SALEM 44.92N 123.02W
12/16/2012 MARION OR UTILITY COMPANY

POWER OUTAGES IN MARION COUNTY AFFECTING 1305 CUSTOMERS.


0700 PM NON-TSTM WND GST 10 S PORTLAND AIRPORT 45.45N 122.60W
12/16/2012 E0.00 MPH CLACKAMAS OR UTILITY COMPANY

POWER OUTAGES AFFECTING 143 CUSTOMERS IN MULTNOMAH
COUNTY.

0700 PM NON-TSTM WND DMG OREGON CITY 45.34N 122.60W
12/16/2012 CLACKAMAS OR UTILITY COMPANY

POWER OUTAGE IN CLACKAMAS COUNTY AFFECTING 368 CUSTOMERS.


0700 PM NON-TSTM WND GST DALLAS 44.92N 123.31W
12/16/2012 E0.00 MPH POLK OR UTILITY COMPANY

POWER OUTAGES IN POLK COUNTY AFFECTING 115 PEOPLE.

0700 PM NON-TSTM WND DMG BLODGETT 44.60N 123.52W
12/16/2012 BENTON OR TRAINED SPOTTER

POWER OUTAGE. LARGE TREE BRANCHES BROKEN.

0711 PM NON-TSTM WND DMG 6 E TIDEWATER 44.42N 123.78W
12/16/2012 LINCOLN OR DEPT OF HIGHWAYS

DOWNED TREES BLOCKING HIGHWAY 34 AT MILEPOST 16.

0759 PM NON-TSTM WND DMG CORVALLIS 44.57N 123.28W
12/16/2012 BENTON OR DEPT OF HIGHWAYS

WIDESPREAD POWER OUTAGES FROM CORVALLIS TO
LEBANON...ALONG HIGHWAY 20.

0933 PM NON-TSTM WND DMG 1 W HOLLEY 44.35N 122.80W
12/16/2012 LINN OR DEPT OF HIGHWAYS

DOWNED TREES AND POWER LINES HAVE CLOSED HIGHWAY 228 FROM
MILEPOST 16 TO 17.

0934 PM NON-TSTM WND DMG 9 S DALLAS 44.79N 123.31W
12/16/2012 POLK OR DEPT OF HIGHWAYS

POWER LINES DOWN ON HIGHWAY 223 AT MILEPOST 12.5 TO 13.0.


0940 PM NON-TSTM WND DMG 3 S MONROE 44.27N 123.30W
12/16/2012 LANE OR DEPT OF HIGHWAYS

DOWNED POWERLINES AND FIRE CLOSING HIGHWAY 99W.

1023 PM NON-TSTM WND GST PACIFIC CITY 45.20N 123.96W
12/16/2012 M61.00 MPH TILLAMOOK OR MESONET

SUSTAINED SOUTH WIND 30 TO 40 MPH. GUSTS 61 MPH.

1035 PM NON-TSTM WND GST 4 S TILLAMOOK 45.40N 123.84W
12/16/2012 M60.00 MPH TILLAMOOK OR AWOS

SUSTAINED SOUTH TO SOUTHWEST WIND 35 TO 40 MPH. GUSTS 60
MPH.

1036 PM NON-TSTM WND DMG 14 S COTTAGE GROVE 43.60N 123.06W
12/16/2012 LANE OR DEPT OF HIGHWAYS

DOWNED TREE BRANCES AND DEBRIS AFFECTING 1 LANE AND
SHOULDER ON INTERSTATE 5.


&&

$$

CROCKEY

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 170644
SWODY2
SPC AC 170642

DAY 2 CONVECTIVE OUTLOOK RESENT 1
NWS STORM PREDICTION CENTER NORMAN OK
1242 AM CST MON DEC 17 2012

VALID 181200Z - 191200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...

UPPER TROUGH WILL EXIT THE ERN U.S. SEABOARD TUESDAY WITH TRAILING
PORTION OF ATTENDANT COLD FRONT MOVING SWD THROUGH FL. A SHORTWAVE
TROUGH WILL AMPLIFY OVER THE SWRN STATES AND APPROACH THE CNTRL/SRN
ROCKIES LATER TUESDAY NIGHT...RESULTING IN THE DEVELOPMENT OF A LEE
CYCLONE OVER THE CNTRL AND SRN HIGH PLAINS.

...NRN CA THROUGH PACIFIC NW COASTS...

DESPITE LIMITED LOW LEVEL MOISTURE...STEEP LAPSE RATES ASSOCIATED
WITH VERY COLD AIR ALOFT /-35 C AT 500 MB/ WITHIN AMPLIFYING UPPER
TROUGH WILL CONTRIBUTE TO WEAK INSTABILITY AND SCATTERED COLD CORE
CONVECTION MOVING ONSHORE. ANY LIGHTNING ACTIVITY IS MORE PROBABLE
DURING FIRST HALF OF THE DAY NEAR THE COASTS BEFORE UPPER LEVEL
THERMAL THROUGH SHIFTS FARTHER INLAND.

...FL...

HEIGHT RISES WILL OCCUR OVER THE FL PENINSULA AS UPPER TROUGH MOVES
OFFSHORE AND A LOW AMPLITUDE RIDGE BUILDS FROM WEST. FORECAST
THERMODYNAMIC PROFILES INDICATE SIGNIFICANT DRYING ALOFT ASSOCIATED
WITH SUBSIDENCE SPREADING INTO THE REGION...WHICH IN CONJUNCTION
WITH ONLY WEAK FRONTAL FORCING SUGGEST THUNDERSTORM POTENTIAL WILL
REMAIN LOW.

..DIAL.. 12/17/2012

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 170617
SWODY2
SPC AC 170616

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1216 AM CST MON DEC 17 2012

VALID 181200Z - 191200Z

...THERE IS A SLGT RISK OF SVR TSTMS ...

...SYNOPSIS...

UPPER TROUGH WILL EXIT THE ERN U.S. SEABOARD TUESDAY WITH TRAILING
PORTION OF ATTENDANT COLD FRONT MOVING SWD THROUGH FL. A SHORTWAVE
TROUGH WILL AMPLIFY OVER THE SWRN STATES AND APPROACH THE CNTRL/SRN
ROCKIES LATER TUESDAY NIGHT...RESULTING IN THE DEVELOPMENT OF A LEE
CYCLONE OVER THE CNTRL AND SRN HIGH PLAINS.

...NRN CA THROUGH PACIFIC NW COASTS...

DESPITE LIMITED LOW LEVEL MOISTURE...STEEP LAPSE RATES ASSOCIATED
WITH VERY COLD AIR ALOFT /-35 C AT 500 MB/ WITHIN AMPLIFYING UPPER
TROUGH WILL CONTRIBUTE TO WEAK INSTABILITY AND SCATTERED COLD CORE
CONVECTION MOVING ONSHORE. ANY LIGHTNING ACTIVITY IS MORE PROBABLE
DURING FIRST HALF OF THE DAY NEAR THE COASTS BEFORE UPPER LEVEL
THERMAL THROUGH SHIFTS FARTHER INLAND.

...FL...

HEIGHT RISES WILL OCCUR OVER THE FL PENINSULA AS UPPER TROUGH MOVES
OFFSHORE AND A LOW AMPLITUDE RIDGE BUILDS FROM WEST. FORECAST
THERMODYNAMIC PROFILES INDICATE SIGNIFICANT DRYING ALOFT ASSOCIATED
WITH SUBSIDENCE SPREADING INTO THE REGION...WHICH IN CONJUNCTION
WITH ONLY WEAK FRONTAL FORCING SUGGEST THUNDERSTORM POTENTIAL WILL
REMAIN LOW.

..DIAL.. 12/17/2012

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KPDT [170614]: Preliminary Local Storm Report

NWUS56 KPDT 170614
LSRPDT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1014 PM PST SUN DEC 16 2012

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

1000 PM HEAVY SNOW 5 WSW YAKIMA 46.56N 120.63W
12/16/2012 M6.2 INCH YAKIMA WA CO-OP OBSERVER

RECEIVED 6.2 INCHES SNOW IN 6 HOURS. CURRENTLY 32 DEGREES
AND LIGHT SNOW.


&&

$$

AA

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