Severe Thunderstorm Warning 30, NWS Houston/Galveston, TX

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
900 PM CST SAT APR 1 2000

SPC ISSUED A SEVERE THUNDERSTORMS WATCH FOR PORTIONS OF SOUTH
TEXAS...SOUTH CENTRAL TEXAS...AND THE WESTERN EDGE OF SOUTHEAST
TEXAS (SEE SATSPSHOU FOR DETAILS ON COUNTIES). CURRENT RADAR DATA
SHOWS SHOWERS AND THUNDERSTORMS DEVELOPING BETWEEN SAN ANTONIO AND
LAREDO WITH A RAPID MOVEMENT TO THE NORTHEAST. CLOUD TOPS CONTINUE
TO COOL AND LIGHTNING CONTINUES TO INCREASE WITH THESE STORMS AS
THEY MOVE ACROSS THE WATCH AREA. APPEARS THAT THESE STORMS ARE
CONCENTRATED BETWEEN A NEARLY STATIONARY FRONTAL BOUNDARY FROM NEAR
DEL RIO NORTHEASTWARD TO AROUND WACO AND A WARM FRONT FROM NEAR
MCALLEN NORTHWARD TO NEAR AUSTIN. WATER VAPOR SATELLITE LOOP
CONTINUE TO SHOW ABUNDANT MOISTURE (WITH A DEEP TROPICAL TAP ALONG
THE ITCZ WELL SOUTH OF THE BAJA PENINSULA) STREAMING TOWARD AND
ACROSS TEXAS AND A HINT OF SOME UPPER LEVEL DIVERGENCE MOVING ACROSS
THE STATE. WILL CONTINUE ALL OF SOUTHEAST TEXAS IN THE SEVERE
WEATHER THREAT TONIGHT PER SPC'S DAY1 MAP/DISCUSSION. VERY HIGH
PRECIP WATER VALUES (APPROACHING 2 INCHES FOR ALMOST A 36 HOUR
STRETCH PER THE 01/12Z AVN RUN) POINT TO THE THREAT FOR SOME HEAVY
RAINS SOMEWHERE FROM TEXAS INTO THE SOUTHERN STATES. WILL CONTINUE
TO MONITOR THE CURRENT RADAR TRENDS AND EXAMINE NEW MODEL DATA AS
THEY ARRIVE. AS LONG AS THE UPPER LEVEL LOW REMAINS TO OUR WEST...
SOUTHEAST TEXAS AREA WILL REMAIN UNDER THE THREAT FOR A HEAVY RAIN
EVENT.

42/43/48

.KHGX...SEVERE THUNDERSTORM WATCH #141 FOR TXZ197-210-211-226-235
        THRU 08Z
        SCEC COASTAL WATERS 0-60 NM AND BAYS.

PRELIMS UNCHANGED...
CLL TT 068/073 059/070 048 40788
IAH TT 069/074 062/072 051 40688
GLS TT 070/075 070/073 060 40578

TXZ163-164-176>179-195>200-210>214-226-227-235>238-020800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
814 PM CST SAT APR 1 2000

...SEVERE THUNDERSTORMS WATCH ISSUED FOR WESTERN PORTIONS OF
SOUTHEAST TEXAS...

THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
THE WESTERN PORTION OF SOUTHEAST TEXAS UNTIL 300 AM CDT. THE FOLLOWING
COUNTIES ARE INCLUDED IN THIS WATCH...AUSTIN...COLORADO...JACKSON...
WASHINGTON...AND WHARTON. SOME CITIES IN THIS SEVERE THUNDERSTORM
WATCH INCLUDE BRENHAM...BELLVILLE...COLUMBUS...PIERCE...AND EDNA.

SHOWERS AND THUNDERSTORMS WERE DEVELOPING THIS EVENING ACROSS PORTIONS
OF SOUTH TEXAS BETWEEN SAN ANTONIO AND LAREDO. THESE STORMS ARE
EXPECTED TO EXPAND IN COVERAGE AND INTENSIFY IN RESPONSE TO A STRONG
UPPER LEVEL DISTURBANCE AND STRENGTHENING UPPER LEVEL WINDS. SOME OF
THESE THUNDERSTORMS ARE EXPECTED TO APPROACH THE SOUTHEAST TEXAS
COUNTIES IN THIS SEVERE THUNDERSTORM WATCH AFTER MIDNIGHT.

THE PRIMARY THREAT WITH THESE THUNDERSTORMS WILL BE STRONG DAMAGING
WINDS AND LARGE HAIL. ADDITIONAL SEVERE THUNDERSTORM WATCHES MAY BE
REQUIRED OVERNIGHT IF THE SEVERE WEATHER THREAT MOVES FURTHER TO THE
NORTHEAST INTO SOUTHEAST TEXAS.

DUE TO THE SLOW MOVEMENT OF THE UPPER LEVEL SYSTEM AND A NEARLY
STATIONARY COLD FRONT LOCATED ACROSS NORTHWEST SECTIONS OF SOUTHEAST
TEXAS...HEAVY RAINFALL IS POSSIBLE OVERNIGHT. THE BEST CHANCE FOR
HEAVY RAINFALL WILL OCCUR ACROSS INLAND LOCATIONS LATE TONIGHT. THE
HEAVY RAINFALL THREAT AREA MAY EXPAND ACROSS ALL OF SOUTHEAST TEXAS ON
SUNDAY AND INTO SUNDAY NIGHT. AVERAGE RAINFALL TOTALS THROUGH SUNDAY
EVENING MAY AVERAGE 1 TO 2 INCHES WITH ISOLATED AMOUNTS OF 5 INCHES
POSSIBLE WHERE BACKBUILDING THUNDERSTORMS DEVELOP.

STORM SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS ARE REQUESTED TO
MONITOR THIS SEVERE WEATHER THREAT TONIGHT AND BE PREPARED FOR
POSSIBLE ACTIVATION.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER RELIABLE WEATHER NEWS
SOURCES FOR FURTHER UPDATES AND POSSIBLE WARNINGS ON THIS SEVERE
WEATHER THREAT.

AS A REMINDER...DAYLIGHT SAVINGS TIME BEGINS AT 200 AM SUNDAY
MORNING. DO NOT FORGET TO MOVE YOUR CLOCKS AHEAD ONE HOUR. THIS WATCH
EXPIRES AT THE TIME CHANGE FROM CENTRAL STANDARD TIME TO CENTRAL
DAYLIGHT TIME.

TXZ163-164-176>179-195>200-210>214-226-227-235>238-021000-

SPECIAL WEATHER STATEMENT...CHANGED SAT TO SUN
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1244 AM CST SUN APR 2 2000

...SEVERE THUNDERSTORMS WATCH FOR WESTERN PORTIONS OF SOUTHEAST
TEXAS WILL EXPIRE AT 200 AM CST (300 AM CDT)...

THE THUNDERSTORMS THAT PROMPTED THE ISSUANCE OF A SEVERE THUNDERSTORM
WATCH FOR THE WESTERN PORTIONS OF SOUTHEAST SATURDAY EVENING HAVE
REMAINED ACROSS CENTRAL AND SOUTH CENTRAL TEXAS. THE LATEST RADAR
TREND INDICATES THE STORMS ARE SLOWLY WEAKENING...AND THIS TREND IS
EXPECTED TO CONTINUE. THEREFORE...THE SEVERE THUNDERSTORM WATCH THAT
WAS IN EFFECT FOR AUSTIN...COLORADO... JACKSON...WASHINGTON...AND
WHARTON COUNTIES WILL BE ALLOWED TO EXPIRE AT 200 AM CST (300 AM
CDT).

ADDITIONAL SHOWERS AND THUNDERSTORMS HAVE BEEN DEVELOPING ACROSS
PORTIONS OF SOUTHEAST TEXAS AND AROUND THE VICTORIA AREA. THESE
STORMS ARE EXPECTED TO EXPAND IN COVERAGE AND POSSIBLY INTENSIFY IN
RESPONSE TO A STRONG UPPER LEVEL DISTURBANCE TO OUR WEST AND
STRENGTHENING UPPER LEVEL WINDS OVER TEXAS. SOME OF THESE
THUNDERSTORMS HAVE THE POTENTIAL TO BECOME SEVERE...WITH THE PRIMARY
THREAT STRONG DAMAGING WINDS AND LARGE HAIL. ADDITIONAL SEVERE
THUNDERSTORM WATCHES MAY BE REQUIRED EARLY THIS MORNING IF THE
SEVERE WEATHER THREAT MOVES FURTHER TO THE NORTHEAST INTO SOUTHEAST
TEXAS.

DUE TO THE SLOW MOVEMENT OF THE UPPER LEVEL SYSTEM AND A NEARLY
STATIONARY COLD FRONT LOCATED ACROSS NORTHWEST SECTIONS OF SOUTHEAST
TEXAS...HEAVY RAINFALL IS POSSIBLE OVERNIGHT. THE BEST CHANCE FOR
HEAVY RAINFALL WILL OCCUR ACROSS INLAND LOCATIONS LATE TONIGHT. THE
HEAVY RAINFALL THREAT AREA MAY EXPAND ACROSS ALL OF SOUTHEAST TEXAS ON
SUNDAY AND INTO SUNDAY NIGHT. AVERAGE RAINFALL TOTALS THROUGH SUNDAY
EVENING MAY AVERAGE 1 TO 2 INCHES WITH ISOLATED AMOUNTS OF 5 INCHES
POSSIBLE WHERE BACKBUILDING THUNDERSTORMS DEVELOP.

STORM SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS ARE REQUESTED TO
MONITOR THIS SEVERE WEATHER THREAT THIS MORNING AND BE PREPARED FOR
POSSIBLE ACTIVATION.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER RELIABLE WEATHER NEWS
SOURCES FOR FURTHER UPDATES AND POSSIBLE WARNINGS ON THIS SEVERE
WEATHER THREAT.

AS A REMINDER...DAYLIGHT SAVINGS TIME BEGINS AT 200 AM THIS MORNING.
DO NOT FORGET TO MOVE YOUR CLOCKS AHEAD ONE HOUR. THIS WATCH EXPIRES
AT THE TIME CHANGE FROM CENTRAL STANDARD TIME TO CENTRAL DAYLIGHT
TIME.

GMZ330-335-350-355-TXZ164-177>179-197>200-210>214-226-227-235>238-
021300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
300 AM CDT SUN APR 2 2000

...SEVERE THUNDERSTORM WATCH ISSUED FOR MOST OF SOUTHEAST TEXAS...

THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
MOST OF SOUTHEAST TEXAS UNTIL 8 AM CDT. THE FOLLOWING COUNTIES ARE
INCLUDED IN THIS WATCH...SAN JACINTO...WALKER...GALVESTON
...WALLER...POLK...HARRIS...JACKSON...MONTGOMERY...GRIMES...
COLORADO...WASHINGTON...BRAZORIA...LIBERTY...CHAMBERS...AUSTIN
...WHARTON...MATAGORDA...FORT BEND AND TRINITY.

VERY MOIST UNSTABLE AIR OVER SOUTHEAST TEXAS AND A PASSING UPPER
LEVEL DISTURBANCE HAS BEEN TRIGGERING STRONG TO SEVERE THUNDERSTORMS
OVER THE WATCH AREA. ALSO...A WEAK COLD FRONT IS MOVING SLOWLY
SOUTHWARD ACROSS SOUTHEAST TEXAS. THIS FRONT WILL SERVE AS A FOCUSING
MECHANISM FOR STRONG TO SEVERE THUNDERSTORM DEVELOPMENT. TRAINING OF
THUNDERSTORMS WILL ALSO LIKELY PRODUCE VERY RAINFALL.

THE PRIMARY THREAT WITH THESE THUNDERSTORMS WILL BE STRONG DAMAGING
WINDS AND LARGE HAIL. VERY HEAVY LOCALIZED RAINFALL OF 2 TO 3 INCHES
AN HOUR IS ALSO POSSIBLE.

STORM SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS ARE REQUESTED TO
MONITOR THIS SEVERE WEATHER THREAT EARLY THIS MORNING AND BE PREPARED
FOR POSSIBLE ACTIVATION.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER RELIABLE WEATHER NEWS
SOURCES FOR FURTHER UPDATES AND POSSIBLE WARNINGS ON THIS SEVERE
WEATHER THREAT.