Tornado Warning 19, NWS Houston/Galveston, TX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
358 AM CDT SAT MAY 1 2004

.DISCUSSION...
HAVE UPDATED THE ZONES TO CALL FOR FALLING TEMPERATURES AFTER
FRONTAL PASSAGE. WILL UPDATE THE GRIDS SHORTLY.

SOME OF THE THUNDERSTORMS IN THE EASTERN PORTIONS OF OUR COUNTY
WARNING AREA CONTINUE TO SHOW WEAK ROTATION. NO SEVERE WEATHER
REPORTS HAVE BEEN RECEIVED FROM ANY OF THESE STORMS YET. WILL LIKELY
DO ANOTHER UPDATE LATER THIS MORNING TO DO SOME MORE ZONE CLEANING.
42/46
&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TORNADO WATCH ALL OF SOUTHEAST TEXAS UNTIL 10 AM.
FLOOD WATCH ALL OF SOUTHEAST TEXAS THROUGH 6 PM.
SCA ALL WATERS THIS MORNING.
SCEC ALL WATERS THIS AFTERNOON.
&&

.PREVIOUS DISCUSSION (358 AM CDT)...
STARTING TO GET BUSY ACROSS OUR COUNTY WARNING AREA. SHOWER AND
THUNDERSTORM COVERAGE CONTINUES TO INCREASE ACROSS SOUTHEAST TEXAS
AHEAD OF THE COLD FRONT AND UPPER LEVEL STORM SYSTEM TO THE WEST.
EXPECT SOUTHEAST TEXAS AIRMASS TO CONTINUE TO DESTABILIZE THIS
MORNING AS THE SYSTEMS EDGE EASTWARD. THERE WILL BE A SEVERE WEATHER
AND HEAVY RAINFALL THREAT FOR SOUTHEAST TEXAS TODAY. A TORNADO WATCH
IS NOW IN EFFECT FOR ALL OF SOUTHEAST TEXAS UNTIL 10 AM. KHGX VWP
SHOWS SOME DIRECTIONAL SHEAR...AND SOME OF THE CELLS MOVING NORTH
THROUGH HARRIS COUNTY HAVE BEEN SHOWING SOME WEAK ROTATION. THE VIL
OF THE DAY IS PROBABLY IN A 65 TO 70 RANGE. WILL ISSUE A FLOOD WATCH
FOR ALL OF SOUTHEAST TEXAS THROUGH 6 PM TONIGHT. EXPECT WIDESPREAD 1
TO 2 INCH RAINFALL TOTALS WITH ISOLATED 3 TO 4 INCH AMOUNTS BEFORE
THE EVENT COMES TO A CLOSE LATER TONIGHT WITH THE PASSAGE OF A COLD
FRONT. AHEAD OF THE FRONT...INSTABILITY WILL BE HIGH WITH EXCELLENT
LIFT AND HIGH PRECIPITABLE WATER VALUES (BETWEEN 1.5 AND 2.0
INCHES). EXPECT RAPID DRYING BEHIND THE FRONT WITH A GRADUAL
DECREASE IN CLOUD COVER. WILL CALL FOR PARTLY CLOUDY SKIES SUNDAY
THROUGH THE UPCOMING WEEK. WILL SEE COOLER MORNING TEMPERATURES ON
SUNDAY AND MONDAY AS SURFACE HIGH PRESSURE SETTLES OVERHEAD. A
GRADUAL WARMUP WILL OCCUR DURING THE WEEK AS THE HIGH MOVES OFF TO
THE EAST AND A RETURN FLOW SETS UP. GOTTA GO 42/46
&&

.PREVIOUS PRELIMINARY POINT TEMPS/POP...
COLLEGE STATION (CLL) 72 52 75 50 79 / 80 30 00 00 00
HOUSTON (IAH)         76 56 75 50 79 / 80 60 00 00 00
GALVESTON (GLS)       75 61 74 60 78 / 80 70 10 00 00
&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
950 PM CDT FRI APR 30 2004

TXZ163-164-176>179-195>200-210>214-226-227-235>238-011200-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON-
GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-MONTGOMERY-
POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-WHARTON-
950 PM CDT FRI APR 30 2004

...LOCALLY HEAVY RAINFALL AND ISOLATED SEVERE THUNDERSTORMS POSSIBLE
ACROSS SOUTHEAST TEXAS LATE TONIGHT AND SATURDAY...

.DAY ONE...TONIGHT.

SHOWERS AND THUNDERSTORMS WILL SLOWLY BECOME MORE NUMEROUS ACROSS
SOUTHEAST TEXAS TONIGHT. A LINE OF STRONG TO SEVERE THUNDERSTORMS IS
EXPECTED TO MOVE INTO THE FAR NORTHERN COUNTIES AFTER 3 AM. LOCALLY
HEAVY RAINFALL AMOUNTS OF 1 TO 2 INCHES CAN BE EXPECTED NORTH OF A
LINE FROM BRENHAM TO TRINITY LATE TONIGHT. A FEW OF THESE STORMS
IN THIS AREA COULD BECOME SEVERE...PRODUCING DAMAGING WINDS OR LARGE
HAIL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED SATURDAY AS A COLD
FRONT MOVES ACROSS SOUTHEAST TEXAS. THE PRIMARY WEATHER THREAT WILL
BE LOCALLY HEAVY RAINFALL. RAINFALL TOTALS WILL AVERAGE 1 TO 2
INCHES WITH ISOLATED TOTALS OF 3 INCHES POSSIBLE. IN ADDITION...A FEW
ISOLATED THUNDERSTORMS COULD BECOME SEVERE PRODUCING LARGE HAIL AND
DAMAGING WINDS. SHOWERS AND THUNDERSTORMS WILL END FROM NORTH TO
SOUTH SATURDAY EVENING. DRY WEATHER WILL PREVAIL FROM SUNDAY THROUGH
THURSDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED LATE TONIGHT AND THROUGH THE DAY
SATURDAY.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
355 AM CDT SAT MAY 1 2004

TXZ163-164-176>179-195>200-210>214-226-227-235>238-011500-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON-
GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-MONTGOMERY-
POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-WHARTON-
355 AM CDT SAT MAY 1 2004

...TORNADO WATCH HAS BEEN ISSUED FOR ALL OF SOUTHEAST TEXAS...

THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR ALL OF
SOUTHEAST TEXAS THROUGH 10 AM. A WARM AND UNSTABLE AIR MASS IS IN
PLACE OVER THE AREA...ALLOWING THUNDERSTORMS TO DEVELOP OVER THE
COASTAL WATERS AND ADJACENT LAND AREAS. WIND FIELDS ARE FAVORABLE
FOR ISOLATED TORNADOES WITH THE STRONGEST STORMS.

STAY TUNED TO YOUR LOCAL RADIO OR TELEVISION STATION...NOAA WEATHER
RADIO...OR VISIT OUR WEB SITE AT WWW.SRH.NOAA.GOV/HGX FOR MORE
INFORMATION.