WW 645 TORNADO TX CW 070100Z - 071000Z
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 645
NWS STORM PREDICTION CENTER NORMAN OK
800 PM CDT MON SEP 6 2010
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTH TEXAS
COASTAL WATERS
EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 800 PM UNTIL
500 AM CDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES EAST SOUTHEAST OF
BROWNSVILLE TEXAS TO 15 MILES NORTH NORTHEAST OF BEEVILLE TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
OTHER WATCH INFORMATION...CONTINUE...WW 644...
DISCUSSION...PER LATEST NHC FCST...TS HERMINE SHOULD MAKE LANDFALL
SOON AFTER WW ISSUANCE AND MOVE NNWWD ACROSS LOWER RIO GRANDE VALLEY
REGION OVER DEEP S TX. ASSOCIATED RISK FOR MINI-SUPERCELLS AND A
FEW BRIEF TORNADOES SHOULD BE WITHIN SMALL SECTOR NNW-NE-SE OF
CENTER OF THIS RELATIVELY COMPACT SYSTEM...WHERE AT LEAST MRGL
BUOYANCY AND ENLARGED LOW-LEVEL HODOGRAPHS WILL BE PRESENT AS
EVIDENT IN 00Z BRO RAOB AND VWP. THIS REGIME SHOULD SHIFT NNWWD AND
NWD UP COASTLINE IN STEP WITH TRANSLATION OF CENTER OF HERMINE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 13035.
...EDWARDS/HART
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WW 0645 Status Reports
STATUS REPORT ON WW 645
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W BRO TO
30 NE MFE TO 55 SSW ALI.
..DIAL..09/07/10
ATTN...WFO...CRP...BRO...
STATUS REPORT FOR WT 645
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TXC007-025-047-057-061-175-249-261-273-297-355-391-409-469-489-
070740-
TX
. TEXAS COUNTIES INCLUDED ARE
ARANSAS BEE BROOKS
CALHOUN CAMERON GOLIAD
JIM WELLS KENEDY KLEBERG
LIVE OAK NUECES REFUGIO
SAN PATRICIO VICTORIA WILLACY
GMZ130-132-135-150-155-230-235-250-255-070740-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
LAGUNA MADRE FROM THE PORT OF BROWNSVILLE TO THE ARROYO COLORADO
LAGUNA MADRE FROM THE ARROYO COLOARDO TO 5 NM NORTH OF PORT
MANSFIELD TX
LAGUNA MADRE FROM 5 NM NORTH OF PORT MANSFIELD TO BAFFIN BAY TX
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WW 0644 Status Reports
STATUS REPORT ON WW 644
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WNW DBQ
TO 40 NNW VOK.
..STOPPKOTTE..09/07/10
ATTN...WFO...ARX...MKX...
STATUS REPORT FOR WS 644
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
WIC001-023-043-049-057-065-081-103-111-123-070440-
WI
. WISCONSIN COUNTIES INCLUDED ARE
ADAMS CRAWFORD GRANT
IOWA JUNEAU LAFAYETTE
MONROE RICHLAND SAUK
VERNON
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
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No Mesoscale Discussions are in effect as of Tue Sep 7 06:46:02 UTC 2010.
SPC 1200Z Day 1 Outlook
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1232 AM CDT TUE SEP 07 2010
VALID 071200Z - 081200Z
...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF ERN/SERN TX...
...SYNOPSIS...
WHILE AN UPPER LOW SHIFTS EWD ACROSS THE GREAT LAKES REGION...A
LARGER LOW/TROUGH IS FORECAST TO DIG SWD INTO THE WRN U.S. THIS
PERIOD. A COLD FRONT ASSOCIATED WITH THE MORE ERN UPPER FEATURE
WILL SHIFT ACROSS THE MIDWEST...WHILE A SECOND FRONT ASSOCIATED WITH
THE WRN UPPER SYSTEM MOVES ACROSS NRN AND CENTRAL CA AND INTO THE
GREAT BASIN LATE. ELSEWHERE...WEAKENING TROPICAL SYSTEM HERMINE
SHOULD LINGER INVOF S TX THROUGH THE PERIOD.
...PARTS OF ERN/SERN TX...
WHILE REMNANT T.S. HERMINE LINGERS OVER S TX...LOW-LEVEL FLOW FIELD
WITHIN THE NE QUADRANT OF THE SYSTEM -- ACROSS A SIZEABLE PORTION OF
ERN/SERN TX -- WILL REMAIN SUPPORTIVE OF CONVECTIVE UPDRAFT
ROTATION. AS CONVECTIVE COVERAGE INCREASES AROUND THE PERIPHERY OF
THE LOW-LEVEL CIRCULATION IN CONJUNCTION WITH AFTERNOON
HEATING/MODEST DESTABILIZATION...POTENTIAL FOR ISOLATED/BRIEF
TORNADOES SHOULD INCREASE. WHILE OVERALL THREAT APPEARS
LIMITED/MARGINAL...POTENTIAL APPEARS GREAT ENOUGH TO INTRODUCE A
LOW-END SLIGHT RISK.
...LOWER GREAT LAKES/OH VALLEY REGION...
THE COLD FRONT PROGRESSING ACROSS THE MIDWEST/OH VALLEY/LOWER LAKES
REGION TODAY WILL SUPPORT THE DEVELOPMENT OF AFTERNOON SHOWERS AND
THUNDERSTORMS...AS MARGINAL AIRMASS DESTABILIZATION OF THE WARM
SECTOR OCCURS. THOUGH LACK OF A MORE FAVORABLE THERMODYNAMIC
ENVIRONMENT SHOULD LIMIT STORM INTENSITY OVERALL...A FEW STRONGER
STORMS NEAR PEAK HEATING COULD -- AIDED BY MODERATE MID-LEVEL WLYS
-- INTENSIFY TO BRIEFLY SEVERE LEVELS. THUS...WILL MAINTAIN 5%
HAIL/WIND POTENTIAL ACROSS THIS REGION.
..GOSS/STOPPKOTTE.. 09/07/2010
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