Severe Thunderstorm Warning 121, NWS Houston/Galveston, TX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
930 PM CDT SUN MAY 29 2005

.UPDATE...
A STATIONARY FRONT WAS LOCATED ACROSS SE TX THIS EVENING...MAINLY
ALONG THE INTERSTATE 10 CORRIDOR.  WATER VAPOR SHOWED ONE
SHORTWAVE TROUGH MOVING OVERHEAD AND COULD SEE ANOTHER APPROACHING
FROM NORTHERN MEXICO.  AM EXPECTING STORMS TO CONTINUE DEVELOPING
GIVEN THE DIFFLUENT FLOW AT 300 AND 200 MB AND THE HIGH PW/S ALONG
AND SOUTH OF THE BOUNDARY.  SOME OF THE GPS PW/S RANGED FROM 1.8
ALONG THE BOUNDARY TO 2.1 AT GALVESTON BAY.

THUS...ISSUED A FLOOD WATCH FOR TONIGHT THROUGH 12Z MONDAY.
RAINFALL POTENTIAL OF 2 INCHES IS POSSIBLE WITH SOME ISOLATED
AMOUNTS OF 3 TO 5 INCHES DUE TO TRAINING.

PL-40

&&

.HGX WATCHES/WARNINGS/ADVISORIES...

TX...
FLOOD WATCH FROM 7 PM SUNDAY UNTIL 7 AM MONDAY FOR THE FOLLOWING
      ZONES...AUSTIN...BRAZORIA...BRAZOS...BURLESON...CHAMBERS...
      COLORADO...FORT BEND...GALVESTON...GRIMES...HARRIS...
      JACKSON...LIBERTY...MATAGORDA...MONTGOMERY...POLK...SAN
      JACINTO...WALKER...WALLER...WASHINGTON...AND WHARTON.
TORNADO WATCH FROM 7 PM SUNDAY UNTIL 11 PM SUNDAY FOR THE
      FOLLOWING ZONES...AUSTIN...BRAZORIA...BRAZOS...BURLESON...
      CHAMBERS...COLORADO...FORT BEND...GALVESTON...GRIMES...
      HARRIS...HOUSTON...JACKSON...LIBERTY...MADISON...
      MATAGORDA...MONTGOMERY...POLK...SAN JACINTO...TRINITY...
      WALKER...WALLER...WASHINGTON...AND WHARTON.

GM...
TORNADO WATCH FROM 7 PM SUNDAY UNTIL 11 PM SUNDAY FOR THE
      FOLLOWING ZONES...GALVESTON BAY...AND MATAGORDA BAY.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1229 PM CDT SUN MAY 29 2005

GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-301200-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON-
GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-
WASHINGTON-WHARTON-
1229 PM CDT SUN MAY 29 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

...MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT...

.DAY ONE...THIS AFTERNOON AND TONIGHT.
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS PORTIONS OF
CENTRAL AND SOUTH CENTRAL TEXAS THIS AFTERNOON AS A MID AND UPPER
LEVEL DISTURBANCE MOVES EASTWARD ACROSS THE STATE. THIS ACTIVITY IS
EXPECTED TO SPREAD EASTWARD AS THE AFTERNOON AND EVENING PROGRESSES.
LARGE HAIL...STRONG DAMAGING WINDS AND TORNADOES ARE ALL POTENTIAL
SEVERE WEATHER THREATS WITH THESE STORMS AS THEY MOVE INTO SOUTHEAST
TEXAS LATER ON TODAY AND TONIGHT.

RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED TO BE COMMON LATE
THIS AFTERNOON AND TONIGHT WITH ISOLATED AREAS POSSIBLY EXPERIENCING
3 TO 4 INCHES OF RAIN. A FLOOD WATCH MAY BE NEEDED FOR PORTIONS OF
SOUTHEAST TEXAS TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
A SLOW MOVING MID AND UPPER LEVEL TROUGH OF LOW PRESSURE WILL SHIFT
EAST AND MOVE OVERHEAD ON MONDAY. THIS FEATURE...COUPLED WITH A
VERY MOIST AND UNSTABLE AIRMASS...WILL TRIGGER ADDITIONAL SHOWERS AND
THUNDERSTORMS ACROSS THE AREA. LOCALLY HEAVY RAINFALL WILL BE A
POSSIBILITY ON MONDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE REQUIRED THIS AFTERNOON AND
TONIGHT.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
505 PM CDT SUN MAY 29 2005

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

0420 PM     HAIL             ROCK ISLAND             29.53N 96.57W
05/29/2005  1.75 INCH        COLORADO           TX   LAW ENFORCEMENT

0425 PM     HAIL             COLUMBUS                29.70N 96.55W
05/29/2005  1.75 INCH        COLORADO           TX   LAW ENFORCEMENT

0430 PM     HAIL             7 W COLUMBUS            29.70N 96.67W
05/29/2005  1.00 INCH        COLORADO           TX   LAW ENFORCEMENT

&&

PBLOOD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
825 PM CDT SUN MAY 29 2005

GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-300700-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON-
GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-
WASHINGTON-WHARTON-
825 PM CDT SUN MAY 29 2005

...NWS HGX WSR-88D RADAR HAS BEEN DOWN SINCE 817 PM CDT...

OUR RADAR HAS INDICATED A HARDWARE FAILURE.  AN ET HAS BEEN
NOTIFIED AND IS ENROUTE. WILL NOTIFY ALL IF/WHEN SYSTEM IS RESTORED
DURING THIS WEATHER EVENT.  FOR THOSE VIEWING DATA ON THE WEB...THE
LAKE CHARLES...LCH... CENTRAL TEXAS...GRK... AND CORPUS CHRISTIE...
CRP... NWS RADARS ARE BEST FOR MONITORING ONGOING THUNDERSTORMS ACROSS
SOUTHEAST TEXAS TONIGHT.

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
901 PM CDT SUN MAY 29 2005

GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-300500-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON-
GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-
WASHINGTON-WHARTON-
901 PM CDT SUN MAY 29 2005

...NWS HGX WSR-88D RADAR BACK IN SERVICE...

OUR ELECTRONICS TECHNICIAN HAS WORKED HIS MAGIC.
AS OF 9 PM HGX WSR-88D RADAR IS ONCE AGAIN OPERATIONAL AND SHOULD BE
UPDATING DATA ON WEBSITES.

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