Sunday, August 19, 2012

KOKX [200359]: Preliminary Local Storm Report

NWUS51 KOKX 200359
LSROKX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
1155 PM EDT SUN AUG 19 2012

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

0830 PM MARINE TSTM WIND 1 ESE ROUND BEACH 41.08N 73.38W
08/17/2012 M41 MPH ANZ335 CT MESONET

MESONET AT NORWALK LIGHT MEASURED 36 KT GUST


&&

$$

JM

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KTWC [200320]: Preliminary Local Storm Report

NWUS55 KTWC 200320
LSRTWC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
820 PM MST SUN AUG 19 2012

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

0814 PM TSTM WND GST 3 NNW TUCSON 32.28N 110.95W
08/19/2012 M58 MPH PIMA AZ TRAINED SPOTTER


&&

EVENT NUMBER TWC1200071

$$

RSM

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KTWC [200316]: Preliminary Local Storm Report

NWUS55 KTWC 200316
LSRTWC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
816 PM MST SUN AUG 19 2012

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

0811 PM TSTM WND GST TUCSON 32.24N 110.94W
08/19/2012 M58 MPH PIMA AZ UNKNOWN

U OF A ATMOS WIND SENSOR


&&

EVENT NUMBER TWC1200070

$$

RSM

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KRAH [200213]: Preliminary Local Storm Report...summary

NWUS52 KRAH 200213
LSRRAH

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE RALEIGH NC
1012 PM EDT SUN AUG 19 2012

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

0916 AM HAIL 1 N ROANOKE RAPIDS 36.47N 77.65W
08/19/2012 M0.75 INCH HALIFAX NC TRAINED SPOTTER

0959 AM FLASH FLOOD 3 NNE LITTLETON 36.47N 77.89W
08/19/2012 HALIFAX NC 911 CALL CENTER

HIGH WATER ON THE ROAD AT 800 WEAVERS CHAPEL ROAD

1011 AM TSTM WND DMG 5 SE ENFIELD 36.14N 77.60W
08/19/2012 HALIFAX NC LAW ENFORCEMENT

TREES AND POWER-LINES DOWN NEAR THE INTERSECTION OF 13
BRIDGES ROAD AND DOUGLAS HILL FARM ROAD.

1036 AM FLASH FLOOD 2 SSW ROANOKE RAPIDS 36.43N 77.66W
08/19/2012 HALIFAX NC 911 CALL CENTER

HIGH WATER ON THE ROAD NEAR 158 SMITH CHURCH ROAD

1048 AM FLASH FLOOD ROANOKE RAPIDS 36.45N 77.65W
08/19/2012 HALIFAX NC 911 CALL CENTER

HIGH WATER ON EAST 12TH STREET BETWEEN MARSHALL STREET
AND JEFFERSON STREET

1057 AM FLASH FLOOD 1 S ROANOKE RAPIDS 36.44N 77.65W
08/19/2012 HALIFAX NC 911 CALL CENTER

HIGH WATER ON JULIAN R. ALLSBROOK HIGHWAY BETWEEN
CAROLINA AVE AND VIRGINIA AVE

1106 AM FLASH FLOOD 1 WSW ROSEMARY 36.45N 77.71W
08/19/2012 HALIFAX NC 911 CALL CENTER

WATER ACROSS ROADWAY AT THE INTERSECTION OF AIRPORT
ROAD AND HIGHWAY 158.


&&

EVENT NUMBER RAH1200867 RAH1200870 RAH1200868 RAH1200871 RAH1200872
RAH1200873 RAH1200869

$$

KRR

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KDVN [200109]: Preliminary Local Storm Report...summary

NWUS53 KDVN 200109
LSRDVN

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
809 PM CDT SUN AUG 19 2012

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

0456 PM HAIL W NORWAY 41.90N 91.93W
08/19/2012 M0.50 INCH BENTON IA TRAINED SPOTTER

STILL HAILING

0510 PM HAIL INDEPENDENCE 42.47N 91.89W
08/19/2012 E0.25 INCH BUCHANAN IA TRAINED SPOTTER

0510 PM HAIL INDEPENDENCE 42.47N 91.89W
08/19/2012 M0.25 INCH BUCHANAN IA TRAINED SPOTTER

VIA ESPOTTER

0553 PM HAIL 1 SW AMISH 41.52N 91.80W
08/19/2012 M0.88 INCH JOHNSON IA TRAINED SPOTTER

HEAVY RAIN ALSO OCCURRING.

0607 PM HAIL 1 WSW KALONA 41.48N 91.71W
08/19/2012 M0.25 INCH WASHINGTON IA TRAINED SPOTTER

0624 PM HAIL 7 N WASHINGTON 41.40N 91.69W
08/19/2012 M0.25 INCH WASHINGTON IA TRAINED SPOTTER

0644 PM HAIL 2 WNW BURLINGTON 40.83N 91.16W
08/19/2012 M0.50 INCH DES MOINES IA TRAINED SPOTTER

PEA TO DIME SIZE

0648 PM HAIL 2 WNW BURLINGTON 40.83N 91.16W
08/19/2012 M0.25 INCH DES MOINES IA TRAINED SPOTTER

LASTED FOR ABOUT TEN MINUTES

0657 PM HAIL 3 SSW BURLINGTON 40.77N 91.14W
08/19/2012 M0.25 INCH DES MOINES IA TRAINED SPOTTER


&&

$$

TEO

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KPSR [200105]: Preliminary Local Storm Report

NWUS55 KPSR 200105
LSRPSR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
605 PM MST SUN AUG 19 2012

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

0600 PM FLASH FLOOD 6 W SAN CARLOS 33.35N 110.57W
08/19/2012 GILA AZ LAW ENFORCEMENT

SAN CARLOS TRIBAL POLICE REPORTED MOTORIST VEHICLE
STRANDED IN WASH ALONG INDIAN ROUTE 6 OLD SAN CARLOS RD.


&&

EVENT NUMBER PSR1200252

$$

NOLTE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 200056
SWODY1
SPC AC 200055

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0755 PM CDT SUN AUG 19 2012

VALID 200100Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SRN AR...SERN OK...NRN LA...
A FEW ISOLATED CELLS MAY POSE A MARGINAL HAIL/WIND THREAT FOR A
COUPLE MORE HOURS BEFORE THE BOUNDARY LAYER STABILIZES. THESE ARE
STORMS BEING HELPED BY THE UPPER TROUGH BUT LOSS OF HEATING ALONG
WITH THE MIDLEVEL WARM LAYER SHOULD RESULT IN A GENERAL WEAKENING
THIS EVENING.

...SC...
THE 00Z CHS SOUNDING SHOWS A VERY MOIST PROFILE WITH MODEST DEEP
LAYER SHEAR SUFFICIENT FOR A FEW LONGER LIVED STORMS. WITH LOSS OF
HEATING...THE MAIN THREAT WILL BE ISOLATED STRONG WIND GUSTS WITH
OUTFLOWS. STORMS WERE MOVING ACROSS SERN GA INTO SRN SC AS OF 0100Z
WITH ONLY A MARGINAL SEVERE THREAT. HOWEVER...FORCING FOR ASCENT MAY
INCREASE THIS EVENING AND OVERNIGHT AS A SHORTWAVE TROUGH DEVELOPS
ACROSS THE GULF COAST STATES WITH WINDS ALOFT INCREASE ACCORDINGLY.
ALTHOUGH WINDS WILL INCREASE...INSTABILITY WILL NOT...BUT A FEW
EMBEDDED STORMS MAY PRODUCE MARGINAL WINDS.

...NRN NM INTO SW TX...
A FEW STORMS WITH HAIL PERSIST ACROSS ERN NM...AND THE STRONGEST
CORES MAY CONTINUE FOR A FEW MORE HOURS HELPED ALONG BY MOIST SLY
LOW LEVEL FLOW AND SUFFICIENTLY LONG HODOGRAPHS. THE PRIMARY THREAT
WILL CONTINUE TO BE HAIL.

..JEWELL.. 08/20/2012

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 200056
SWODY1
SPC AC 200054

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0754 PM CDT SUN AUG 19 2012

VALID 200100Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SRN AR...SERN OK...NRN LA...
A FEW ISOLATED CELLS MAY POSE A MARGINAL HAIL/WIND THREAT FOR A
COUPLE MORE HOURS BEFORE THE BOUNDARY LAYER STABILIZES. THESE ARE
STORMS BEING HELPED BY THE UPPER TROUGH BUT LOSS OF HEATING ALONG
WITH THE MIDLEVEL WARM LAYER SHOULD RESULT IN A GENERAL WEAKENING
THIS EVENING.

...SC...
THE 00Z CHS SOUNDING SHOWS A VERY MOIST PROFILE WITH MODEST DEEP
LAYER SHEAR SUFFICIENT FOR A FEW LONGER LIVED STORMS. WITH LOSS OF
HEATING...THE MAIN THREAT WILL BE ISOLATED STRONG WIND GUSTS WITH
OUTFLOWS. STORMS WERE MOVING ACROSS SERN GA INTO SRN SC AS OF 0100Z
WITH ONLY A MARGINAL SEVERE THREAT. HOWEVER...FORCING FOR ASCENT MAY
INCREASE THIS EVENING AND OVERNIGHT AS A SHORTWAVE TROUGH DEVELOPS
ACROSS THE GULF COAST STATES WITH WINDS ALOFT INCREASE ACCORDINGLY.
ALTHOUGH WINDS WILL INCREASE...INSTABILITY WILL NOT...BUT A FEW
EMBEDDED STORMS MAY PRODUCE MARGINAL WINDS.

...NRN NM INTO SW TX...
A FEW STORMS WITH HAIL PERSIST ACROSS ERN NM...AND THE STRONGEST
CORES MAY CONTINUE FOR A FEW MORE HOURS HELPED ALONG BY MOIST SLY
LOW LEVEL FLOW AND SUFFICIENTLY LONG HODOGRAPHS. THE PRIMARY THREAT
WILL CONTINUED TO BE HAIL.

..JEWELL.. 08/20/2012

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KSLC [200052]: Preliminary Local Storm Report...corrected

NWUS55 KSLC 200052
LSRSLC

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
652 PM MDT SUN AUG 19 2012

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

0613 PM FLASH FLOOD 14 W BIG WATER 37.11N 111.91W
08/19/2012 KANE UT TRAINED SPOTTER

LARGE FLASH FLOOD ALONG THE PARIA RIVER. SPOTTER
ESTIMATED FIRST 200 TO 300 YARDS OF FLOOD WAS COMPOSED OF
DEBRIS INCLUDING TREES AND LOGS. FLOOD WAS OBSERVED GOING
UNDER THE BRIDGE ALONG HIGHWAY 89.


&&

$$

MPS

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KSLC [200049]: Preliminary Local Storm Report

NWUS55 KSLC 200049
LSRSLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
649 PM MDT SUN AUG 19 2012

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

0613 PM FLASH FLOOD 14 W BIG WATER 37.11N 111.91W
08/19/2012 KANE UT TRAINED SPOTTER

LARGE FLASH FLOOD ALONG THE PARIA RIVER. SPOTTER
ESTIMATED FIRST 200 TO 300 YARDS OF FLOOD WAS COMPOSED OF
DEBRIS INCLUDING TREES AND LOGS.


&&

$$

MPS

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KSLC [200038]: Preliminary Local Storm Report

NWUS55 KSLC 200038
LSRSLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
638 PM MDT SUN AUG 19 2012

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

0620 PM FLASH FLOOD ZION NP 37.22N 112.99W
08/19/2012 WASHINGTON UT PARK/FOREST SRVC

SIGNIFICANT FLASH FLOODING ALONG NORTH CREEK INCLUDING
THE SUBWAY. FLASH FLOODING ALSO REPORTED IN SPRY CANYON
AND ALONG THE NORTH FORK OF THE VIRGIN.


&&

$$

MPS

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KTWC [200021]: Preliminary Local Storm Report

NWUS55 KTWC 200021
LSRTWC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
520 PM MST SUN AUG 19 2012

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

0500 PM TSTM WND GST 1 SSW BISBEE-DOUGLAS AI 31.45N 109.60W
08/19/2012 M60 MPH COCHISE AZ ASOS

DOUGLAS ASOS REPORTED A 60 MPH WIND GUSTS AT 500 PM MST


&&

EVENT NUMBER TWC1200069

$$

MOLLERE

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KSLC [200018]: Preliminary Local Storm Report

NWUS55 KSLC 200018
LSRSLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
618 PM MDT SUN AUG 19 2012

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

0600 PM FLASH FLOOD ZION NP 37.22N 112.99W
08/19/2012 WASHINGTON UT PARK/FOREST SRVC

SIGNIFICANT FLASH FLOODING IN KEYHOLE AND PINE CREEK
CANYONS.


&&

$$

MPS

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KJAN [200012]: Preliminary Local Storm Report

NWUS54 KJAN 200012
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
712 PM CDT SUN AUG 19 2012

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

0645 PM WATER SPOUT 2 W GOSHEN SPRINGS 32.47N 89.95W
08/19/2012 RANKIN MS PUBLIC

NUMEROUS REPORTS OF A WATER SPOUT OVER THE ROSS BARNETT
RESERVOIR.


&&

$$

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KCHS [191730]: Preliminary Local Storm Report

NWUS52 KCHS 191730
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
130 PM EDT SUN AUG 19 2012

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

0112 PM TSTM WND DMG 1 WNW WEST ASHLEY 32.81N 80.03W
08/19/2012 CHARLESTON SC 911 CALL CENTER

CHARLESTON COUNTY 911 CENTER REPORTED A TREE DOWN NEAR
THE INTERSECTION OF ORLEANS ROAD AND SAVAGE ROAD IN WEST
ASHLEY. TIME ESTIMATED BASED ON RADAR.


&&

EVENT NUMBER CHS1200700

$$

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KCHS [191726]: Preliminary Local Storm Report

NWUS52 KCHS 191726
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
126 PM EDT SUN AUG 19 2012

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

0115 PM MARINE TSTM WIND 4 ESE CHARLESTON 32.75N 79.87W
08/19/2012 M44 MPH AMZ330 SC MESONET

FORT SUMTER OBSERVATION FROM WEATHERFLOW MESONET
REPORTED A THUNDERSTORM WIND GUST OF 44 MPH OR 38 KTS.


&&

EVENT NUMBER CHS1200699

$$

RFM

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KJAX [191719]: Preliminary Local Storm Report

NWUS52 KJAX 191719
LSRJAX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
119 PM EDT SUN AUG 19 2012

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

0112 PM TSTM WND GST 5 NNE ORANGE PARK 30.24N 81.68W
08/19/2012 M46 MPH DUVAL FL ASOS

JACKSONVILLE NAVAL AIR STATION MEASURED A GUST TO 46 MPH
FROM 260 DEGREES. SUSTAINED WIND WAS 37 MPH.


&&

$$

MTRABERT

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KBMX [191702]: Preliminary Local Storm Report

NWUS54 KBMX 191702
LSRBMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1201 PM CDT SUN AUG 19 2012

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

0607 PM TSTM WND DMG NE LINDEN 32.31N 87.80W
08/18/2012 MARENGO AL EMERGENCY MNGR

ABOUT ONE DOZEN LARGE HARDWOOD TREES UPROOTED OR SNAPPED
IN THE CITY OF LINDEN. A FEW SNAPPED TREES WERE ALSO
VISIBLE ON COUNTY ROAD 44 5.5 MILES NORTHEAST OF LINDEN.
ESTIMATED WIND SPEEDS 80 MPH.


&&

$$

MROSE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 191624
SWODY1
SPC AC 191622

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1122 AM CDT SUN AUG 19 2012

VALID 191630Z - 201200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM FAR SERN VA TO THE LOWER
SAVANNAH RIVER VALLEY...

...SYNOPSIS...

LONGWAVE TROUGH --ANCHORED BY UPPER LOW JUST E OF JAMES BAY-- WILL
BE MAINTAINED E OF THE ROCKIES THROUGH THE D1 PERIOD. WITHIN THIS
BROAD-SCALE PATTERN...CONSIDERABLE STRENGTHENING OF MID AND
HIGH-LEVEL WIND FIELD IS FORECAST ALONG THE ATLANTIC SEABOARD IN
CONJUNCTION WITH A SERIES OF VORTICITY MAXIMA TRANSLATING NEWD FROM
BASE OF LONGWAVE TROUGH. ON THE UPSTREAM SIDE OF BASAL PORTION OF
LARGE-SCALE TROUGH...A VORTICITY MAXIMUM WILL MOVE SEWD THROUGH THE
OZARK PLATEAU REGION TODAY BEFORE WEAKENING ACROSS THE LOWER MS
VALLEY OVERNIGHT.

IN THE LOW LEVELS...16Z SURFACE ANALYSIS SHOWS AN AREA OF LOW
PRESSURE OVER NERN TN/FAR WRN VA WITH A COUPLE OF SEPARATE SURFACE
WAVES PRESENT IN ERN NC AND N-CNTRL SC. LATEST MODEL GUIDANCE
SUGGESTS THAT A CONSOLIDATION OF THESE FEATURES WILL OCCUR TODAY
WITH A DEEPENING SURFACE LOW MOVING OFF THE SERN VA COAST LATE
TONIGHT INTO MONDAY MORNING. MEANWHILE...A TRAILING COLD FRONT WILL
ADVANCE EWD THROUGH THE APPALACHIANS AND PIEDMONT WITH WRN EXTENSION
OF BOUNDARY SETTLING SWD ACROSS THE GULF COAST STATES AND CNTRL/SRN
TX.

...SERN AND SRN MID-ATLANTIC COASTAL AREAS THROUGH THIS AFTERNOON...

A BROKEN BAND OF STRONG-SEVERE STORMS IS IN PROGRESS THIS MORNING
FROM SERN VA TO THE LOWER SAVANNAH RIVER VALLEY...FORCED BY GLANCING
INFLUENCE OF A VORTICITY MAXIMUM PROGRESSING NEWD THROUGH THE CNTRL
APPALACHIANS. MODIFICATION OF 12Z MHX AND CHS SOUNDINGS FOR CURRENT
SURFACE CONDITIONS SUGGESTS THAT AMBIENT INFLOW AIR MASS HAS BECOME
UNCAPPED AND IS MODERATELY UNSTABLE WITH MLCAPE OF 1500-2500 J/KG.
MOREOVER...AREA VAD DATA SHOW THE PRESENCE OF A 40-50 KT MIDLEVEL
JET DEVELOPING EWD FROM THE APPALACHIANS INTO PIEDMONT WHICH IS
YIELDING VERTICALLY VEERING WIND PROFILES WITH 35-45 KT OF
DEEP-LAYER SHEAR. THE GIVEN ENVIRONMENT WILL REMAIN SUPPORTIVE OF
EMBEDDED SUPERCELL AND BOWING STRUCTURES THIS AFTERNOON WITH THE
PRIMARY HAZARD BEING DAMAGING WINDS ASSOCIATED WITH WET MICROBURSTS.
A WEAK TORNADO OR TWO IS ALSO POSSIBLE...NAMELY OVER SERN VA/NERN
NC...WHERE NEAR-GROUND SHEAR IS BEING ENHANCED BY LOCALLY BACKED
SURFACE WINDS INVOF WARM FRONT.

...NRN FL...

W-E ORIENTED BAND OF TSTMS ALONG THE SHELF WATERS OF THE GOM IS
EXPECTED TO MOVE/DEVELOP EWD ACROSS AREA TODAY WITHIN WLY FLOW
REGIME SAMPLED BY 12Z TLH SOUNDING. MODEL GUIDANCE INDICATES SOME
STRENGTHENING OF WIND FIELD TODAY...WHICH WHEN COUPLED WITH THE
MOIST...MODERATELY UNSTABLE AIR MASS /I.E. MLCAPE OF 1500-2500 J PER
KG/...SETUP WILL SUPPORT EMBEDDED...FORWARD-PROPAGATING STORM
CLUSTERS CAPABLE OF ISOLATED DAMAGING WIND GUSTS.

...ERN OK/WRN AR...

FORCING FOR ASCENT/DCVA ASSOCIATED WITH VORTICITY MAXIMUM MENTIONED
IN SYNOPSIS WILL COMBINE WITH LOW-LEVEL UPLIFT ALONG WEAK COLD
FRONT/WIND SHIFT MOVING EWD/SEWD ACROSS THE AREA TO FOSTER WIDELY
SCATTERED TSTMS THIS AFTERNOON AND EVENING. DESPITE SOME MIDLEVEL
COOLING...POOR LAPSE RATES WILL LIMIT THE POTENTIAL FOR MORE ROBUST
INSTABILITY TO DEVELOP. STILL...SOME POTENTIAL WILL EXIST FOR
LOCALLY STRONG WIND GUSTS OWING TO THE PRESENCE OF MODESTLY STRONG
DEEP...NWLY SHEAR.

...ERN NM/WRN TX...

A CLUSTER OF TSTMS IS ONGOING AS OF LATE MORNING W OF LBB ALONG WEAK
FRONT SAGGING SWD THROUGH WRN TX. MODIFYING 12Z MAF SOUNDING FOR
ANTICIPATED AFTERNOON CONDITIONS SUGGESTS THAT ENVIRONMENT SHOULD
SUSTAIN THE SWD PROGRESSION OF THESE STORMS AS MLCAPE INCREASES TO
1500-2500 J/KG. ADDITIONAL...ISOLATED-WIDELY SCATTERED TSTMS WILL
BE POSSIBLE LATER THIS AFTERNOON INTO EVENING WITHIN POST-FRONTAL
UPSLOPE REGIME DEVELOPING OVER NERN NM. THOUGH VERTICAL SHEAR WILL
REMAIN RELATIVELY WEAK...THE MODERATE INSTABILITY AND STEEP LAPSE
RATES WILL PROMOTE VIGOROUS UP/DOWNDRAFTS WITH A RISK FOR LOCALLY
DAMAGING WINDS AND SOME HAIL IN BOTH REGIMES.

..MEAD/SMITH.. 08/19/2012

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KCHS [191540]: Preliminary Local Storm Report

NWUS52 KCHS 191540
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1140 AM EDT SUN AUG 19 2012

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

1129 AM TSTM WND DMG RINCON 32.30N 81.24W
08/19/2012 EFFINGHAM GA 911 CALL CENTER

THE EFFINGHAM COUNTY 911 CALL CENTER RELAYED A REPORT
OF A POWER LINE DOWN ALONG LONG BRIDGE ROAD.


&&

EVENT NUMBER CHS1200698

$$

DPB

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KRAH [191512]: Preliminary Local Storm Report

NWUS52 KRAH 191512
LSRRAH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
1112 AM EDT SUN AUG 19 2012

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

1106 AM FLASH FLOOD 1 WSW ROSEMARY 36.45N 77.71W
08/19/2012 HALIFAX NC 911 CALL CENTER

WATER ACROSS ROADWAY AT THE INTERSECTION OF AIRPORT
ROAD AND HIGHWAY 158.


&&

EVENT NUMBER RAH1200869

$$

CBL

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KRAH [191509]: Preliminary Local Storm Report

NWUS52 KRAH 191509
LSRRAH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
1108 AM EDT SUN AUG 19 2012

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

1011 AM TSTM WND DMG 5 SE ENFIELD 36.14N 77.60W
08/19/2012 HALIFAX NC LAW ENFORCEMENT

TREES AND POWER-LINES DOWN NEAR THE INTERSECTION OF 13
BRIDGES ROAD AND DOUGLAS HILL FARM ROAD.


&&

EVENT NUMBER RAH1200868

$$

CBL

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WATCHES: Severe Thunderstorm Watch Number 585

WWUS20 KWNS 191437
SEL5
SPC WW 191437
GAZ000-NCZ000-SCZ000-VAZ000-CWZ000-192200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 585
NWS STORM PREDICTION CENTER NORMAN OK
1035 AM EDT SUN AUG 19 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

FAR EASTERN GEORGIA
EASTERN NORTH CAROLINA
EASTERN SOUTH CAROLINA
FAR SOUTHEAST VIRGINIA
COASTAL WATERS

EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1035 AM UNTIL 600
PM EDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES EITHER SIDE OF A LINE FROM 35 MILES EAST NORTHEAST
OF ELIZABETH CITY NORTH CAROLINA TO 50 MILES SOUTHWEST OF
SAVANNAH GEORGIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...BROKEN BAND OF TSTMS ONGOING FROM ENE RZZ TO WNW OF SAV
IS EXPECTED TO INTENSIFY LATE THIS MORNING INTO AFTERNOON OWING TO
THE INFLUX OF A WARM...MOIST AIR MASS WHERE MLCAPE HAS INCREASED TO
1000-2000 J/KG. VERTICAL SHEAR SHOULD ALSO STEADILY INCREASE TODAY
AS REGION IS GLANCED BY A SERIES OF MIDLEVEL PERTURBATIONS
TRANSLATING NEWD ALONG THE APPALACHIANS. AS SUCH...SETUP WILL
BECOME INCREASINGLY SUPPORTIVE OF A FEW SUPERCELLS AND BOWING
STRUCTURES CAPABLE OF MAINLY DAMAGING WIND GUSTS. A BRIEF TORNADO
IS ALSO POSSIBLE OVER FAR SERN VA/NERN NC WHERE LOCALLY BACKED
NEAR-SURFACE WINDS ARE ENHANCING LOW-LEVEL SHEAR.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION
VECTOR 24025.


...MEAD

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MESO: Mesoscale Discussion 1789

ACUS11 KWNS 191353
SWOMCD
SPC MCD 191353
NCZ000-VAZ000-SCZ000-191530-

MESOSCALE DISCUSSION 1789
NWS STORM PREDICTION CENTER NORMAN OK
0853 AM CDT SUN AUG 19 2012

AREAS AFFECTED...THE CAROLINA AND SOUTHEAST VIRGINIA COASTAL PLAIN

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 191353Z - 191530Z

PROBABILITY OF WATCH ISSUANCE...60 PERCENT

SUMMARY...IT IS NOT CERTAIN THAT A WW WILL BE NEEDED...BUT TRENDS
ARE BEING MONITORED FOR THE POSSIBILITY OF AN INCREASING SEVERE
THREAT THAT COULD REQUIRE ONE LATE THIS MORNING OR EARLY THIS
AFTERNOON.

DISCUSSION...SEVERAL WEAK WAVES ARE EVIDENT ALONG A STALLED OR SLOW
MOVING SURFACE FRONT ROUGHLY EXTENDING ALONG THE I-95 CORRIDOR.
VARIABILITY IS HIGH AMONG THE MODELS CONCERNING THESE FEATURES...
BUT IT APPEARS THAT ONE UPPER IMPULSE IS ALREADY BEGINNING TO
RAPIDLY LIFT NORTHEAST OF THE SOUTHERN APPALACHIANS...WITH PERHAPS
ANOTHER WEAKER IMPULSE BEGINNING TO LIFT NORTHEAST OF THE EASTERN
GULF STATES.

SOUTHWESTERLY MID/UPPER FLOW IS MODERATELY STRONG NEAR THE
FRONT...ALONG WHICH CLUSTERS OF STORMS ARE GENERALLY
CONCENTRATED...AND THIS IS PROVIDING MORE THAN SUFFICIENT SHEAR FOR
MID-LEVEL UPDRAFT ROTATION AND ORGANIZED CONVECTION.
HOWEVER...LOW-LEVEL FLOW IS RATHER WEAK /20 KT OR LESS AT 850 MB/
AND NOT EXPECTED TO STRENGTHEN SUBSTANTIVELY. FURTHERMORE
MID-LEVELS ARE RELATIVELY WARM WITH WEAK LAPSE RATES...AND LOW-
LEVEL LAPSE RATES ARE NOT LIKELY TO STEEPEN SUBSTANTIALLY AHEAD OF
ACTIVITY. ON THE OTHER HAND...NEAR SURFACE AND DEEP LAYER MOISTURE
CONTENT IS HIGH...AND WILL CONTRIBUTE TO HEAVY PRECIPITATION LOADING
IN STRONGER CONVECTION.

IT CERTAINLY DOES NOT SEEM OUT OF THE QUESTION THAT AT LEAST
OCCASIONAL LOCALIZED STRONG SURFACE GUSTS WILL BE POSSIBLE WITH
SCATTERED EVOLVING STORM CLUSTERS...AS 25-30+ KT WEST SOUTHWESTERLY
DEEP LAYER MEAN FLOW ADVECTS THEM INTO AND ACROSS THE COASTAL PLAIN
THROUGH THE 15-18Z TIME FRAME. BUT...SEVERE POTENTIAL BEYOND
THAT...AT LEAST IN THE NEAR TERM...REMAINS A BIT UNCLEAR.

..KERR/MEAD.. 08/19/2012

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

ATTN...WFO...AKQ...MHX...RAH...ILM...CHS...CAE...

LAT...LON 32668002 33338038 34147977 35147854 35897755 36767694
36847595 35887546 35137563 33997723 33037900 32737960
32668002

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KRAH [191339]: Preliminary Local Storm Report

NWUS52 KRAH 191339
LSRRAH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
939 AM EDT SUN AUG 19 2012

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

0916 AM HAIL 1 N ROANOKE RAPIDS 36.47N 77.65W
08/19/2012 M0.75 INCH HALIFAX NC TRAINED SPOTTER


&&

EVENT NUMBER RAH1200867

$$

CBL

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KEWX [191311]: Preliminary Local Storm Report

NWUS54 KEWX 191311
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
810 AM CDT SUN AUG 19 2012

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

1159 PM HEAVY RAIN 5 S GEORGETOWN 30.58N 97.69W
08/18/2012 M4.40 INCH WILLIAMSON TX AMATEUR RADIO

24 HOUR RAINFALL TOTAL.


&&

EVENT NUMBER EWX1200457

$$

PM

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 191248
SWODY1
SPC AC 191246

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0746 AM CDT SUN AUG 19 2012

VALID 191300Z - 201200Z

...THERE IS A SLGT RISK OF SVR TSTMS OVER PARTS OF THE ERN CAROLINAS
AND FAR SE VA...

...SYNOPSIS...
WRN RIDGE/ERN TROUGH PATTERN WILL PERSIST THROUGH THE PERIOD. FAIRLY
AMPLIFIED CYCLONIC FLOW WILL EXIST FROM THE PLNS TO THE E CST AS
TROUGH AXIS LINGERS OVER THE LWR MS/OH VLYS. AT THE SFC...A WEAK
FRONT WILL LINGER FROM THE CAROLINAS W/SW ACROSS THE GULF CST STATES
INTO TX. AMPLE MOISTURE AND SOME DEGREE OF ASCENT ALONG THIS
BOUNDARY SHOULD SUPPORT SCTD DIURNALLY ENHANCED STORMS THROUGH THE
PERIOD. A WAVE OF LOW PRESSURE NOW FORMING ALONG THE FRONT IN SC
SHOULD MOVE NE ALONG IT LATER TODAY...PROVIDING A FOCUS FOR STRONG
TO POSSIBLY SVR STORMS. ELSEWHERE...WEAK UPSLOPE FLOW BENEATH MODEST
NWLY WINDS ON WRN SIDE OF UPR TROUGH MAY FOSTER AFTN/EVE STORM
DEVELOPMENT OVER THE SRN RCKYS AND ADJACENT HI PLNS.

...ERN CAROLINAS/FAR SE VA TODAY...
WHILE MID LVL LAPSE RATES WILL REMAIN WEAK...TSTMS SHOULD INCREASE
IN COVERAGE AND STRENGTH OVER THE NC/SC CSTL PLN LATER TODAY AS SFC
HEATING DESTABILIZES MOIST AXIS /PW AOA 2 INCHES/ AHEAD OF
AFOREMENTIONED SFC WAVE. DEVELOPMENT ALSO WILL BE FOSTERED BY ASCENT
WITH A SERIES OF WEAK DISTURBANCES MOVING NE ACROSS REGION ON ERN
FRINGE OF LARGE SCALE UPR TROUGH.

AREA WIND PROFILES ALREADY SHOW AMPLE DEEP SWLY SHEAR FOR
SUSTAINED...ORGANIZED STORMS...AND LOW TO MID TROPOSPHERIC FLOW
SHOULD SOMEWHAT STRENGTHEN AS LEAD UPR IMPULSE NOW IN GA CONTINUES
NE INTO THE CAROLINAS. COMBINATION OF RICH MOISTURE WITH 35-40 KT SW
700-500 MB FLOW...APPRECIABLE UPR DIVERGENCE IN ENTRANCE REGION OF
DEVELOPING MID ATLANTIC HIGH-LVL JET STREAK...AND SLIGHTLY-BACKED
LOW LVL WINDS INVOF FRONT SUGGEST THE POTENTIAL FOR A FEW SUPERCELLS
WITH BOWING SEGMENTS AND/OR LOW LVL MESOS POSING A RISK FOR DMGG
WIND AND ISOLD TORNADOES...MAINLY THROUGH THE AFTN AND POSSIBLY AS
FAR NE AS SE VA.

...NRN FL/SRN GA THIS AFTN...
SEASONABLY STRONG...DEEP UNIDIRECTIONAL WSWLY FLOW WILL PREVAIL OVER
S GA/N FL TODAY ON SRN FRINGE OF LARGE SCALE TROUGH. SFC HEATING
AND UPLIFT ALONG RESIDUAL OUTFLOW BOUNDARIES/SEA BREEZE FRONTS MAY
YIELD STORM CLUSTERS CONTAINING TRANSIENT SMALL BOWS WITH LOCALLY
DMG WIND.

...AR INTO NRN LA THIS AFTN...
STRONG HEATING AND RELATIVELY COOL AIR ALOFT IN AXIS OF UPR TROUGH
WILL SUPPORT MODERATE DESTABILIZATION OVER PARTS OF THE SRN
OZARKS/LWR MS VLY TODAY. SCTD AFTN STORMS SHOULD FORM ALONG WEAK SFC
TROUGH/SECONDARY FRONTAL SURGE LOW FROM SRN MO INTO WRN AR. NWLY MID
LVL FLOW WILL ENHANCE HODOGRAPH LENGTH AND MAY YIELD A FEW STORMS
CAPABLE OF SVR HAIL AND LOCALLY DMGG WIND.

...NRN NM THIS AFTN/EVE...
MODEST NWLY UPR LVL FLOW WILL EXIST ON THE WRN FRINGE OF MS VLY
TROUGH...ENHANCING DEEP DIRECTIONAL SHEAR ACROSS REGION AS LOW LVL
WINDS VEER TO SLY LATER TODAY. SUFFICIENT MOISTURE SHOULD BE PRESENT
TO SUPPORT A FEW SWD-MOVING STORMS CAPABLE OF SVR HAIL AND POSSIBLY
LOCALLY DMGG WIND INTO EARLY TNGT.

..CORFIDI/HURLBUT.. 08/19/2012

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KEWX [191232]: Preliminary Local Storm Report

NWUS54 KEWX 191232
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
732 AM CDT SUN AUG 19 2012

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

0530 AM FLASH FLOOD 3 NW SAN ANTONIO 29.49N 98.54W
08/19/2012 BEXAR TX DEPT OF HIGHWAYS

THERE IS HIGH WATER ON THE LOWER LEVELS OF IH35
AFFECTING BOTH THE NORTHBOUND AND SOUTHBOUND LANES NEAR
PRESA AVENUE.


&&

EVENT NUMBER EWX1200456

$$

PM

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KEWX [191205]: Preliminary Local Storm Report

NWUS54 KEWX 191205
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
705 AM CDT SUN AUG 19 2012

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

0530 AM FLASH FLOOD 5 E HONDO 29.36N 99.08W
08/19/2012 MEDINA TX LAW ENFORCEMENT

SEVERAL ROADS CLOSED THROUGH-OUT THE COUNTY...
INCLUDING CR471 AND CR741.


&&

EVENT NUMBER EWX1200455

$$

PM

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KJAN [191202]: Preliminary Local Storm Report

NWUS54 KJAN 191202
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
701 AM CDT SUN AUG 19 2012

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

0400 AM LIGHTNING 2 E EUPORA 33.54N 89.25W
08/18/2012 WEBSTER MS BROADCAST MEDIA

LIGHTNING CAUSED A FIRE AT A CHURCH ON TANK HILL ROAD


&&

$$

DL

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KMHX [191129]: Preliminary Local Storm Report...corrected

NWUS52 KMHX 191129
LSRMHX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
729 AM EDT SUN AUG 19 2012

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

0155 AM HEAVY RAIN 7 ENE HAVELOCK 34.93N 76.82W
08/19/2012 M3.50 INCH CRAVEN NC SPOTTER

3.50 INCHES OF RAIN RECORDED BETWEEN 1128 PM AND 155 AM
IN CLUB FOOT CREEK AREA


&&

CORRECTED REMARKS

EVENT NUMBER MHX1200427

$$

JME

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 190835
SWOD48
SPC AC 190835

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0335 AM CDT SUN AUG 19 2012

VALID 221200Z - 271200Z

...DISCUSSION...
GUIDANCE IS HIGHLY CONSISTENT THAT THE HEIGHT GRADIENT ASSOCIATED
WITH THE AMPLIFIED UPPER-LEVEL TROUGH IN THE ERN CONUS WILL FURTHER
RELAX. A SHORT WAVE TROUGH CENTERED NEAR THE NRN ROCKIES EARLY WED
SHOULD DAMPEN AS IT EJECTS EWD INTO THE NRN PLAINS/UPPER MS VALLEY
ON D4-6. RICHER LOW-LEVEL MOISTURE SHOULD BE GRADUALLY DRAWN NWD
ACROSS THE PLAINS...BUT KINEMATIC FIELDS APPEAR TO REMAIN MODEST.
THEREAFTER...A MORE VIGOROUS SHORT WAVE TROUGH MAY ADVANCE FROM SWRN
CANADA/PACIFIC NW TOWARDS THE CANADIAN PRAIRIES/FAR NRN PLAINS NEXT
WEEKEND. BUT STRONGER MID-LEVEL FLOW APPEARS TO BE WELL-REMOVED FROM
THE WARM SECTOR/FRONTAL BOUNDARY IN THE N-CNTRL CONUS. THESE SETUPS
DO NOT APPEAR SUPPORTIVE OF HIGHER-END SEVERE COVERAGE.

..GRAMS.. 08/19/2012

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KEWX [190804]: Preliminary Local Storm Report

NWUS54 KEWX 190804
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
304 AM CDT SUN AUG 19 2012

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

0252 AM FLASH FLOOD 4 N LACKLAND AFB 29.44N 98.62W
08/19/2012 BEXAR TX DEPT OF HIGHWAYS

ROAD CLOSURE. PINN RD FROM W. COMMERCE TO HWY151


&&

EVENT NUMBER EWX1200454

$$

JPB

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 190727
SWODY3
SPC AC 190726

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0226 AM CDT SUN AUG 19 2012

VALID 211200Z - 221200Z

...SYNOPSIS...
AN AMPLIFIED LARGE-SCALE UPPER-LEVEL TROUGH WILL PERSIST FROM SERN
CANADA TO THE GULF COAST...ALTHOUGH THE HEIGHT GRADIENT WILL BEGIN
TO RELAX. AN EMBEDDED SHORT WAVE IMPULSE SHOULD PROGRESS FROM THE
MIDWEST TOWARDS THE MID-ATLANTIC. A QUASI-STATIONARY FRONT WILL
REMAIN ORIENTED SW/NE FROM THE CNTRL GULF COAST TO THE MID-ATLANTIC.
IN THE NORTHWEST...A SHORT WAVE TROUGH WILL IMPINGE ON AN
UPPER-LEVEL RIDGE AND SHOULD REACH THE NRN ROCKIES/SRN CANADIAN
ROCKIES BY 12Z/WED.

...NRN ROCKIES...
AS MID-LEVEL HEIGHT FALLS AND LARGE-SCALE ASCENT OVERSPREAD THE
REGION...ISOLATED TSTMS MAY BE ONGOING TUE MORNING ALONG A PLUME OF
HIGHER PW VALUES BEING ADVECTED NWD FROM THE GREAT BASIN. TSTM
COVERAGE WILL LIKELY DIURNALLY INCREASE...BUT GUIDANCE IS FAIRLY
CONSISTENT THAT A NARROW BELT OF STRONG MID-LEVEL SWLYS WILL LARGELY
LAG THE LOBE OF LEADING ASCENT. THIS BREEDS UNCERTAINTY OVER THE
DEGREE OF JUXTAPOSITION BETWEEN STRENGTHENING DEEP-LAYER SHEAR AND
GREATER INSTABILITY. AS SUCH...WILL ONLY INTRODUCE LOW-END SEVERE
PROBABILITIES ATTM.

...SOUTH/LOWER MID-ATLANTIC COAST...
ONE MORE DAY OF MARGINAL DAMAGING WIND POTENTIAL SHOULD EXIST
DOWNSTREAM OF THE LARGE-SCALE UPPER-LEVEL TROUGH. ALTHOUGH LOW-LEVEL
FLOW WILL BE WEAK AND MID-LEVEL SWLYS SHOULD SUBSIDE SLIGHTLY
RELATIVE TO D2...ASCENT TIED TO THE SHORT WAVE IMPULSE CROSSING THE
OH VALLEY AREA ON TUE AFTERNOON SHOULD AID IN A DIURNAL INCREASE IN
TSTM COVERAGE. PRECEDING DAYS OF CONVECTION SHOULD MAINTAIN WEAK
MID-LEVEL LAPSE RATES...BUT LOCALIZED DAMAGING WINDS WILL REMAIN
POSSIBLE WHERE POCKETS OF STRONGER SURFACE HEATING OCCUR.

..GRAMS.. 08/19/2012

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KEWX [190726]: Preliminary Local Storm Report

NWUS54 KEWX 190726
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
226 AM CDT SUN AUG 19 2012

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

0218 AM HEAVY RAIN 2 SSE LEON VALLEY 29.47N 98.60W
08/19/2012 E1.40 INCH BEXAR TX TRAINED SPOTTER

30 MIN RAINFALL


&&

EVENT NUMBER EWX1200453

$$

JPB

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KEWX [190721]: Preliminary Local Storm Report

NWUS54 KEWX 190721
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
221 AM CDT SUN AUG 19 2012

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

0217 AM FLASH FLOOD 2 SSE LACKLAND AFB 29.36N 98.62W
08/19/2012 BEXAR TX DEPT OF HIGHWAYS

ROAD CLOSURE. BROOKVALLEY AT RAY ELLISON BLVD


&&

EVENT NUMBER EWX1200452

$$

JPB

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KEWX [190658]: Preliminary Local Storm Report

NWUS54 KEWX 190658
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
158 AM CDT SUN AUG 19 2012

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

0100 AM FLASH FLOOD 5 W CHINA GROVE 29.39N 98.43W
08/19/2012 BEXAR TX DEPT OF HIGHWAYS

ROAD CLOSURE DUE TO FLOODING. AMITY RD AT ROLAND AVE.


&&

EVENT NUMBER EWX1200451

$$

JPB

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KAMA [190629]: Preliminary Local Storm Report...summary

NWUS54 KAMA 190629
LSRAMA

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
128 AM CDT SUN AUG 19 2012

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

0556 PM TSTM WND GST 2 NW TIMBERCREEK CANYON 35.08N 101.85W
08/18/2012 M71 MPH RANDALL TX BROADCAST MEDIA

SCHOOLNET SITE AT MIDWAY ALTERNATIVE.

0611 PM TSTM WND GST 1 NNW CANYON 35.00N 101.93W
08/18/2012 M60 MPH RANDALL TX NWS EMPLOYEE

3 TO 5 INCH DIAMETER TREE LIMBS DOWN IN HUNSLEY HILLS


&&

EVENT NUMBER AMA1200611 AMA1200612

$$

EA

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KMHX [190602]: Preliminary Local Storm Report

NWUS52 KMHX 190602
LSRMHX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
201 AM EDT SUN AUG 19 2012

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

0155 AM HEAVY RAIN 7 ENE HAVELOCK 34.93N 76.82W
08/19/2012 M3.50 INCH CRAVEN NC SPOTTER

3.50 INCHES OF RAIN RECORDED BETWEEN 1128 PM AND 155 AM


&&

EVENT NUMBER MHX1200427

$$

JME

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 190554
SWODY2
SPC AC 190553

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1253 AM CDT SUN AUG 19 2012

VALID 201200Z - 211200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A LARGE-SCALE UPPER-LEVEL TROUGH WILL REMAIN ANCHORED FROM THE CNTRL
GREAT LAKES TO THE LOWER MS VALLEY...WITH A QUASI-STATIONARY FRONT
DRAPED FROM THE MID-ATLANTIC TO THE DEEP SOUTH. AN UPPER-LEVEL RIDGE
WILL PERSIST FROM THE SOUTHWEST TO THE NRN ROCKIES...WITH A WEAK
MID-LEVEL IMPULSE EXPECTED TO MOVE SEWD ACROSS THE HIGH PLAINS ON
MON AFTERNOON.

...SRN HIGH PLAINS...
GUIDANCE REMAINS RATHER CONSISTENT IN DEPICTING A WEAK MID-LEVEL
IMPULSE PROGRESSING SEWD BETWEEN THE WRN RIDGE AND CNTRL/ERN CONUS
TROUGH ON MON. THIS SHOULD BE FAVORABLY TIMED WITH THE DIURNAL
HEATING CYCLE AND WILL LIKELY YIELD TSTMS FORMING ALONG THE LEE OF
THE SRN ROCKIES BY LATE AFTERNOON WITHIN A WEAKLY BUOYANT AIR MASS.
ALTHOUGH FLOW FIELDS SHOULD REMAIN MODEST...NEARLY STRAIGHT-LINE
HODOGRAPHS SHOULD BE SUFFICIENT FOR A FEW MARGINAL SUPERCELL
STRUCTURES INITIALLY. DESPITE ONLY MODEST BUOYANCY...CONVECTION WILL
LIKELY GROW UPSCALE INTO AN MCS AND BE SUSTAINED INTO MON NIGHT AS A
30-40 KT LLJ FORMS...WITH MARGINAL THREATS FOR SEVERE HAIL/WIND INTO
THE TX/OK PANHANDLES.

...SOUTHEAST/SOUTH ATLANTIC COAST...
GUIDANCE HAS BECOME MORE CONSISTENT WITH THE SYNOPTIC PATTERN
DEPICTION...ALTHOUGH DISCREPANCIES REMAIN WITH THE FORECAST
THERMODYNAMIC ENVIRONMENT. NEVERTHELESS...GUIDANCE HAS TRENDED
TOWARD THE LESS UNSTABLE SPECTRUM WHICH APPEARS REASONABLE GIVEN
MODEST MID-LEVEL LAPSE RATES OBSERVED IN REGIONAL 00Z RAOBS AND AT
LEAST SCATTERED PRECEDING CONVECTION ON D1. EVEN WHERE STRONGER
POCKETS OF HEATING OCCUR ON MON...MLCAPE WILL LIKELY REMAIN AOB 1000
J/KG. ALTHOUGH THIS WILL BE COINCIDENT WITH 30-50 KT SWLYS AT 500
MB...LOW-LEVEL FLOW SHOULD BE WEAK. AS SUCH...TSTM CLUSTERS MAY
INCREASE IN COVERAGE DURING THE AFTERNOON/EVENING WITHIN THE
RIGHT-ENTRANCE REGION OF A STRONG UPPER-LEVEL JET CENTERED ALONG THE
BREADTH OF THE APPALACHIANS...BUT ACTIVITY SHOULD STRUGGLE TO
SUSTAIN HIGH INTENSITY AND MAY ONLY YIELD SPORADIC DAMAGING WINDS.

..GRAMS.. 08/19/2012

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 190547
SWODY1
SPC AC 190545

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1245 AM CDT SUN AUG 19 2012

VALID 191200Z - 201200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
BROAD CYCLONIC UPPER FLOW WILL STRETCH FROM THE PLAINS TO THE E
COAST WITH A TROUGH AXIS ACROSS THE MS/OH VALLEY WITH COLD AIR
ALOFT. AT THE SURFACE...A WEAK BOUNDARY WILL EXIST FROM NERN TX EWD
ACROSS THE CNTRL GULF COAST STATES AND NEWD ACROSS THE CAROLINAS AND
SERN VA AT 00Z. AMPLE MOISTURE ALONG THIS BOUNDARY WILL RESULT IN
SCATTERED STORMS MAINLY DURING THE DAY.

AN AREA OF LOW PRESSURE IS FORECAST TO DEVELOP ACROSS SC DURING THE
DAY...ASSOCIATED WITH AN UPPER DISTURBANCE AND TRAVELING NEWD ALONG
THE FRONT. THIS WILL PROVIDE A FOCUS FOR ISOLATED SEVERE WEATHER.

TO THE W...WEAK SLY UPSLOPE BENEATH NWLY FLOW ALOFT MAY RESULT IN A
FEW STRONG STORMS OVER NRN NM.

...SC/NC...
WIDESPREAD RAIN AND A FEW STORMS ARE EXPECTED TO PERSIST FROM NRN GA
INTO THE WRN CAROLINAS ALONG AND N OF THE FRONT. S OF THE
BOUNDARY...HEATING WILL COMBINE WITH NEAR 70 F DEWPOINTS TO PRODUCE
POCKETS OF MODERATE INSTABILITY. INCREASING FLOW WITH HEIGHT WILL
RESULT IN FAVORABLE SHEAR TO ORGANIZE STORMS AS THEY STRADDLE THE
BOUNDARY...WITH A DAMAGING WIND AND MARGINAL HAIL THREAT ON THE WARM
SIDE. ENHANCED LOW LEVEL SHEAR NEAR THE FRONT COULD ALSO ENCOURAGE
AREAS OF ROTATION AND PERHAPS A BRIEF/WEAK TORNADO. THIS AREA OF LOW
PRESSURE AND ASSOCIATED STORMS MAY AFFECT FAR SERN VA DURING THE
EVENING. THE POSSIBILITY OF NUMEROUS STORMS AND ONGOING AREAS OF
RAIN MAY MITIGATE SEVERE COVERAGE TO A DEGREE...BUT AT LEAST
ISOLATED SEVERE STORMS APPEAR LIKELY.

...AR INTO NRN LA...
STRONG HEATING AND RELATIVELY COOL AIR ALOFT WILL YIELD UNSTABLE
CONDITIONS WITH STORMS FORMING IN A WEAK SFC LOW PRESSURE TROUGH
ACROSS SRN MO INTO WRN AR. NWLY FLOW ALOFT WILL HELP PRODUCE LONG
ENOUGH HODOGRAPHS FOR A FEW CELLS CAPABLE OF LARGE HAIL AND DAMAGING
WIND GUSTS.

...WRN PA/NY...ERN OH...
A TIGHT MIDLEVEL TEMPERATURE GRADIENT WILL EXTEND FROM KY INTO SRN
NEW ENGLAND...WITH 500 MB TEMPERATURES AROUND -16 C FROM OH INTO WRN
PA DURING THE DAY. A WEAK INVERTED SFC TROUGH AND HEATING MAY BE
ENOUGH FOR ISOLATED CONVECTION DURING THE AFTERNOON. FORECAST
SOUNDINGS INDICATE STORMS MAY BE LOW TOPPED...BUT COOL AIR ALOFT AND
SHEAR MAY FAVOR SOME HAIL.

...NRN NM...
NWLY FLOW ALOFT WILL EXIST ON THE BACK SIDE OF THE UPPER TROUGH. SFC
WINDS WILL VEER TO SLY DURING THE DAY...CREATING GOOD DIRECTIONAL
SHEAR WITH HEIGHT. A FEW SWD MOVING HAIL STORMS ARE LIKELY.

..JEWELL/COHEN.. 08/19/2012

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KEWX [190459]: Preliminary Local Storm Report

NWUS54 KEWX 190459
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1159 PM CDT SAT AUG 18 2012

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

1110 PM HEAVY RAIN 1 E SERENADA 30.70N 97.67W
08/18/2012 M5.05 INCH WILLIAMSON TX MESONET

BERRY CREEK BRIEFLY TOUCHED FLOOD STAGE... RAAINFALL
OVER 8 HR TIMESPAN

1110 PM FLOOD 1 E SERENADA 30.70N 97.67W
08/18/2012 WILLIAMSON TX MESONET

BERRY CREEK BRIEFLY TOUCHED FLOOD STAGE... RAAINFALL
OVER 8 HR TIMESPAN


&&

EVENT NUMBER EWX1200449
EVENT NUMBER EWX1200450

$$

JPB

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KEWX [190448]: Preliminary Local Storm Report

NWUS54 KEWX 190448
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1148 PM CDT SAT AUG 18 2012

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

1125 PM HEAVY RAIN 4 SW HUTTO 30.50N 97.59W
08/18/2012 M1.68 INCH WILLIAMSON TX COCORAHS

1 HR 35 MIN RAINFALL


&&

EVENT NUMBER EWX1200448

$$

JPB

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KEWX [190431]: Preliminary Local Storm Report

NWUS54 KEWX 190431
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1131 PM CDT SAT AUG 18 2012

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

1015 PM HEAVY RAIN 3 SSE SPRING BRANCH 29.83N 98.38W
08/18/2012 M2.72 INCH COMAL TX NWS EMPLOYEE

1 HR 15 MIN DURATION


&&

EVENT NUMBER EWX1200447

$$

JPB

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KEWX [190427]: Preliminary Local Storm Report

NWUS54 KEWX 190427
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1126 PM CDT SAT AUG 18 2012

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

0933 PM TSTM WND DMG ROSANKY 29.93N 97.30W
08/18/2012 BASTROP TX TRAINED SPOTTER

LARGE TREE UPROOTED... SIGNIFICANT TREE DAMAGE... TIN
PEELED OFF BARN ROOF... HEAVY RAIN


&&

EVENT NUMBER EWX1200446

$$

JPB

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