Severe Thunderstorm Warning 81, NWS Austin/San Antonio, TX

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
335 AM CDT SUN APR 2 2000

MODELS BRING WEST COAST TROUGH EASTWARD IN 48 HOURS WITH AXIS
RIGHT OVER CWA BY 7 PM CDT MONDAY.  BEFORE THEN CONTINUE THE SHOWER
AND THUNDERSTORM ACTIVITY AS TRAJECTORY OF PACIFIC MOISTURE WILL BE
OVER SOUTH TEXAS.  PVA ASSOCIATED WITH APPROACHING WEST COAST TROUGH
WILL BE THE TRIGGER FOR CONVECTION.  SOME ADJUSTMENT MAY BE
NECESSARY CONCERNING TIMING OF ENDING OF PRECIPITATION LATE MONDAY
AFTERNOON OR MONDAY EVENING DEPENDING UPON PROXIMITY OF UPSTREAM
TROUGH OFF THE WEST COAST TO THE ABOVE-MENTIONED TROUGH.  WILL
MAINTAIN THE FLASH FLOOD WATCH TODAY WITH SOME EXTENSION NECESSARY
INTO TONIGHT OR EVEN MONDAY.  SPC ALSO HAS MUCH OF SOUTH CENTRAL
TEXAS IN A SLIGHT RISK AREA FOR TODAY AND TONIGHT.

COLD FRONT TO BRING MUCH DRIER AND MUCH COLDER AIR TO CWA MONDAY
NIGHT AND TUESDAY MORNING.

PRELIMINARY NUMBERS...
AUS 67/56/68/41 776-
SAT 68/57/69/41 776-
DRT 68/55/73/44 553-

.EWX...FLASH FLOOD WATCH TODAY SOUTH CENTRAL TEXAS AND HILL COUNTRY.

TXZ171>173-183>194-202>209-217>225-228-021700-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 AM CDT SUN APR 2 2000

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND THROUGH
TONIGHT ACROSS MOST OF SOUTH CENTRAL TEXAS.  THIS AREA IS ALONG AND
EAST OF A LINE FROM JUNCTION TO LEAKEY TO COTULLA.

A STRONG UPPER LEVEL TROUGH OF LOW PRESSURE OVER NORTHWESTERN MEXICO
IS EXPECTED TO CONTINUE TO MOVE SLOWLY EASTWARD AND A COLD FRONT WILL
STALL ALONG FAR SOUTHERN SECTIONS OF SOUTH CENTRAL TEXAS.  IN
ADDITION...A MOIST AIRMASS WILL PERSIST ACROSS SOUTHERN TEXAS.

THE UPPER LEVEL TROUGH AND COLD FRONT WILL INTERACT WITH THE MOIST
AIRMASS AND AIDED BY DAYTIME HEATING...SCATTERED TO NUMEROUS SHOWERS
AND THUNDERSTORMS WILL DEVELOP...MAINLY ALONG THE FRONT.  SOME OF
STORMS MAY BECOME SEVERE ACROSS PORTIONS OF SOUTH CENTRAL TEXAS.  THE
APPROACH OF ANOTHER AND MUCH STRONGER COLD FRONT WILL HELP SUSTAIN
SHOWERS AND THUNDERSTORM DEVELOPMENT TONIGHT.

THE MAIN THREAT WILL BE LARGE HAIL AND DAMAGING WINDS FROM SOME OF
THE STRONGEST STORMS.  ISOLATED TORNADOES ALSO ARE A POSSIBLE ALONG
THE COLD FRONT.  SOME OF THE SHOWERS AND THUNDERSTORMS COULD
REPEATEDLY DEVELOP AND MOVE OVER THE SAME AREAS...PRODUCING HEAVY
RAINS...ESPECIALLY ALONG AND NORTH OF THE COLD FRONT.

SPOTTER NETWORKS MAY NEED TO BE ACTIVATED ACROSS THE HILL COUNTRY
AND ADJACENT AREAS OF SOUTH CENTRAL TEXAS THIS AFTERNOON AND TONIGHT.
THE SPOTTERS MAY BE NEEDED FOR A PROLONGED PERIOD AS THE STORMS
LIKELY WILL PERSIST THROUGH TONIGHT AND INTO MONDAY.

FOR INFORMATION ON WEATHER THREATS IN SURROUNDING AREAS...REFER TO
OUTLOOKS FROM OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...
HOUSTON/GALVESTON AND CORPUS CHRISTI.