Severe Thunderstorm Warning 42, NWS Corpus Christi, TX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
726 PM CDT MON APR 30 2007

.UPDATE...CANCELLED THE TORNADO WATCH FOR LIVE OAK AND MCMULLEN
COUNTIES. THIS IS MAINLY DUE TO THE FACT THAT THE SOUTHWARD
PROPAGATING SEVERE MCS CONTINUES TO PUSH AWAY FROM THIS RGN.
ALSO...THESE COUNTIES HAVE ALREADY BEGUN TO STABILIZE FROM
EARLIER CONVECTION AND HAVE DIVERGENT BOUNDARY LYR FLOW.

&&

.PREV DISCUSSION... /ISSUED 651 PM CDT MON APR 30 2007/

UPDATE...A BACK-BUILDING MCS WL CONTINUE THE THREAT FOR SVR WX
ACROSS THE SOUTHEASTERN PORTION OF THE CWA. THIS SYSTEM CONTINUES
TO BUILD SOUTHWARD TWDS THE HIGHER CAPE VALUES ACROSS WEBB AND
DUVAL COUNTIES (2500+ J/KG). A S/SE LLJ OF 30-40 KT IS HELPING TO
MAINTAIN THIS SYSTEM WITH HIGH OCTANE AIR SITUATED TO THE SOUTH.
AN OUTFLOW BOUNDARY WHICH THIS SYSTEM INITIALLY DEVELOPED UPON WAS
SLOWLY SINKING SWD ACROSS NRN WEBB...NRN DUVAL AND NRN JIM WELL
COUNTIES. THE TORNADO THREAT WL CONTINUE ACROSS MAINLY DUVAL
COUNTY WHERE STORM-RELATIVE HELICITIES EXCEED 300 M2/S2. WL SHAVE
OFF LASALLE COUNTY FROM THE TORNADO WATCH GIVEN THE MORE STABLE
AIR IN THIS RGN. BLV THIS SYSTEM WL BGEING TO WEAKEN IN THE NEXT
1-3 HOURS AS THE AIRMASS BEGINS TO STABILIZE...AS THE OUTFLOW
BOUNDARY WEAKENS AND AS SUBSIDENCE FROM OUT WEST WORKS INTO THE RGN.
AFTER MIDNIGHT...AM NOT EXPECTING MUCH IF ANY ACTIIVTY AS THE
AIRMASS CONTINUES TO STABILIZE AND SLOWLY DRY OUT. WL RECONFIGURE
THE SCA TO ONLY INCLUDE THE BAYS AND NEARSHORE WATERS FOR ANOTHER
FEW HOURS. DECIDED TO CANCEL THE SEVERE THUNDERSTORM WATCH FOR
GOLIAD AND VICTORIA COUNTIES GIVEN THE LOW CAPES...INCREASING CAP
AND THICK CLOUD CVR ACROSS THAT RGN. MADE A FEW OTHER ADJUSTMENTS
TO THE REMAINDER OF THE GRIDS TO REFLECT THE UPDATED THINKING.

&&

.PRELIMINARY POINT TEMPS/POPS...
CORPUS CHRISTI    72  84  74  87  74  /  20  10  10  10  10
VICTORIA          70  82  72  86  70  /  40  20  20  10  10
LAREDO            74  97  76  98  76  /  30  20  20  10  10
ALICE             71  89  73  90  72  /  40  20  10  10  10
ROCKPORT          71  83  74  81  75  /  20  10  10  10  10
COTULLA           71  91  72  93  73  /  10  20  20  10  10
KINGSVILLE        72  87  73  89  75  /  20  20  10  10  10
NAVY CORPUS       73  83  75  83  76  /  20  10  10  10  10

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR THE
     FOLLOWING ZONES: BAYS AND WATERWAYS FROM BAFFIN BAY TO PORT
     ARANSAS...BAYS AND WATERWAYS FROM PORT ARANSAS TO PORT
     OCONNOR...COASTAL WATERS BAFFIN BAY TO PORT ARANSAS OUT 20
     NM...COASTAL WATERS PORT ARANSAS TO MATAGORDA SHIP CHANNEL
     OUT 20 NM.

&&

MB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
303 PM CDT MON APR 30 2007

GMZ230-235-250-255-270-275-TXZ229>234-239>247-011100-
BAYS AND WATERWAYS FROM BAFFIN BAY TO PORT ARANSAS-
BAYS AND WATERWAYS FROM PORT ARANSAS TO PORT OCONNOR-
COASTAL WATERS BAFFIN BAY TO PORT ARANSAS OUT 20 NM-
COASTAL WATERS PORT ARANSAS TO MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS BAFFIN BAY TO PORT ARANSAS 20 TO 60 NM-
WATERS PORT ARANSAS TO MATAGORDA SHIP CHANNEL 20 TO 60 NM-
LA SALLE-MCMULLEN-LIVE OAK-BEE-GOLIAD-VICTORIA-WEBB-DUVAL-
JIM WELLS-KLEBERG-NUECES-SAN PATRICIO-ARANSAS-REFUGIO-CALHOUN-
303 PM CDT MON APR 30 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS AND THE MIDDLE
TEXAS COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH
THIS EVENING ACROSS THE COASTAL AND RIO GRANDE PLAINS. THIS ACTIVITY
WILL SPREAD TO THE COASTAL BEND LATE THIS EVENING AND OVERNIGHT IN A
SCATTERED FASHION. SEVERE THUNDERSTORMS ARE POSSIBLE AREAWIDE
THROUGH TONIGHT WITH DAMAGING WINDS...LARGE HAIL AND TORDADOES
POSSIBLE. HEAVY RAINFALL IS ALSO POSSIBLE WHICH MAY RESULT IN
LOCALIZED FLASH FLOODING.

SMALL CRAFT ADVISORY CONDITIONS WILL CONTINUE ACROSS ALL THE WATERS
THROUGH THE EVENING HOURS..

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE UPPER LEVEL SYSTEM WILL BEGIN TO EXIT THE REGION ON TUESDAY WITH
RAIN CHANCES DIMINISHING TO A SLIGHT CHANCE. A WEAK SHORTWAVE WILL
MOVE ACROSS SOUTH TEXAS ON THURSDAY WITH A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. A POTENT UPPER LEVEL SYSTEM WILL APPROACH THE
REGION ON SUNDAY BRINGING A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS TO SOUTH TEXAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED

87/81/85

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
649 PM CDT MON APR 30 2007

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

0450 PM     TSTM WND DMG     22 SSW TILDEN           28.16N 98.68W
04/30/2007                   MCMULLEN           TX   LAW ENFORCEMENT

            2 POWER POLES SNAPPED ON COUNTY ROAD 624...ROUGHLY 8
            MILES WEST OF HIGHWAY 16. TIME IS A VERY ROUGH ESTIMATE.

0510 PM     HAIL             23 S TILDEN             28.12N 98.54W
04/30/2007  M1.00 INCH       MCMULLEN           TX   LAW ENFORCEMENT

            NICKLE TO QUARTER SIZE HAIL AT INTERSECTION OF HIGHWAY 16
            AND COUNTY ROAD 624.

&&

JR

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
708 PM CDT MON APR 30 2007

TXZ239-010045-
WEBB-
708 PM CDT MON APR 30 2007

...A STRONG THUNDERSTORM WAS AFFECTING WEBB COUNTY...

AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 19 MILES WEST OF FREER...OR 28 MILES NORTH OF
MIRANDO CITY...MOVING SOUTH AT 15 MPH. THIS STORM WILL AFFECT
RURAL AREAS OF NORTHEAST WEBB COUNTY ALONG HIGHWAY 59.

DIME SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS
STORM.

TMT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
738 PM CDT MON APR 30 2007

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

0435 PM     TORNADO          16 N FREER              28.11N 98.62W
04/30/2007                   MCMULLEN           TX   PUBLIC

            TORNADO OBSERVED JUST WEST OF HIGHWAY 16 NEAR F.M. 624
            AND HIGWAY 16.

&&

JR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
740 PM CDT MON APR 30 2007

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

0650 PM     HAIL             FREER                   27.88N 98.62W
04/30/2007  M2.50 INCH       DUVAL              TX   PUBLIC

            GOLFBALL TO TENNIS BALL SIZE HAIL OBSERVED IN FREER.

0720 PM     HAIL             FREER                   27.88N 98.62W
04/30/2007  M1.25 INCH       DUVAL              TX   PUBLIC

&&

JR

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