Severe Thunderstorm Warning 39, NWS Fort Worth, TX

TXZ031-037-071617

URBAN AND SMALL STREAM FLOOD STATEMENT
NATIONAL WEATHER SERVICE WACO TX
1015 AM CST WED MAR 7 1990

...OCCASIONAL HEAVY RAINS COVERING CENTRAL TEXAS...

THUNDERSTORMS AND SHOWERS...WITH OCCASIONAL HEAVY RAIN...COVERED
MOST OF CENTRAL TEXAS. INDIVIDUAL SHOWERS WERE MOVING NORTHEAST
40 MPH...WITH THE AREA DRIFTING TO THE EAST NEAR 30 MPH.

PERSONS THROUGH CENTRAL TEXAS SHOULD USE CAUTION DUE TO FLOODING
OF ROADWAY..LOW LYING..FLOOD PRONE AREAS. BE SUSPICIOUS OF ANY WATER
OVER ROADWAYS.

STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS.

TXZ021>023-026>028-031>033-072200-

SEVERE WEATHER POTENTIAL STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1115 AM CST WED MAR 7 1990

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE SOUTH
CENTRAL...EAST...AND NORTHEAST PARTS OF NORTH TEXAS THIS AFTERNOON.
THE AREA IS GENERALLY SOUTHEAST OF A LINE THROUGH TEXARKANA...
SULPHUR SPRINGS...WAXAHACHIE...HILLSBORO AND LAMPASAS. THIS
INCLUDES THE CITIES OF TYLER...LONGVIEW...LUFKIN...AND WACO.

THUNDERSTORMS WERE CONTINUING AT MIDDAY ALONG A RAIN-COOLED BOUNDARY
THAT STRETCHED FROM SHREVEPORT TO LONGVIEW TO PALESTINE TO TEMPLE.
THIS RAIN-COOLED AREA WAS CAUSED BY THUNDERSTORMS LAST NIGHT...
AND REPRESENTED THE BEST AREA FOR SEVERE THUNDERSTORMS TO
DEVELOP THIS AFTERNOON. THAT'S BECAUSE THIS AREA MARKED THE EDGE
OF STRONG LOW LEVEL CONVERGENCE... GOOD TURNING OF THE LOW LEVEL
WINDS...AND BEST INSTABILITES... ALL INGREDIANTS FOR SEVERE
THUNDERSTORMS.

ON THE LARGER SCALE... AN UPPER LEVEL LOW PRESSURE AREA OVER
WESTERN COLORADO AND EASTERN KANSAS THIS MORNING WAS WEAKENING
AS IT MOVED NORTHEAST. ENERGY ASSOCIATED WITH THE SUBTROPICAL
JET STREAM...HOWEVER...WAS FOCUSED OVER THE THUNDERSTORMS IN
CENTRAL AND NORTHEAST TEXAS AND WAS CONTRIBUTING TO THUNDERSTORM
STRENGTH. THUS THIS AREA IS THE FOCUS FOR SEVERE WEATHER THIS
AFTERNOON.

THUNDERSTORMS ARE ALSO POSSIBLE TODAY ALONG THE DRY LINE WHICH
WAS LOCATED FROM GAINESVILLE...TO MINERAL WELLS TO LAMPASAS AT
MIDDAY. BUT BECAUSE THESE THUNDERSTORMS WERE DEEPER IN THE RAIN
COOLED AIR AND THUS CUT OFF SOMEWHAT FROM THE BEST LOW LEVEL
FORCING... THEY WERE NOT EXPECTED TO BECOME AS INTENSE AS THE
THUNDERSTORMS DEVELOPING ALONG A WACO-TYLER LINE.

HEAVY RAINS ARE ALSO A POSSIBILITY... AND A FLASH FLOOD WATCH
REMAINED IN EFFECT FOR TODAY FOR MOST OF NORTH CENTRAL AND
NORTHEAST TEXAS FOR TODAY.

EMERGENCY MANAGEMENT OFFICIALS AND SPOTTERS WILL WANT TO KEEP
IN TOUCH WITH LATEST WEATHER DEVELOPMENTS TODAY. ACTIVATION CAN
BE EXPECTED ANY TIME...BUT THE BEST CHANCES FOR SEVERE WEATHER
WILL EXIST THIS AFTERNOON...WHEN DAYTIME HEATING IS AT A MAXIMUM.

THUNDERSTORMS WILL GRADUALLY MOVE EAST TONIGHT...DIMINISHING OVER
CENTRAL PORTIONS BUT CONTINUING OVER SOUTHEAST PORTIONS OF NORTH
TEXAS ON TONIGHT. THUNDERSTORMS ARE EXPECTED OVER NORTHEAST TEXAS
ON THURSDAY...BUT ARE NOT EXPECTED REACH SEVERE LEVELS.

TXZ031-037-071845-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
1143 AM CST WED MAR 7 1990

...A FLASH FLOOD WATCH IS IN EFFECT THIS AFTERNOON FOR CENTRAL
TEXAS...

AT 1135 AM CST A STRONG THUNDERSTORM WITH HEAVY RAIN WAS LOCATED
10 MILES WEST OF GATESVILLE...MOVING NORTHEAST 40 MPH.

OTHERWISE...SHOWERS AND THUNDERSTORMS COVERED MOST OF CENTRAL TEXAS
...MOVING EAST 30 MILES AN HOUR...WITH INDIVIDUAL SHOWERS MOVING
NORTHEAST 40 MILES AN HOUR.

PERSONS LIVING IN AND MOTORIST DRIVING THROUGH SHOULD BE EXTREMELY
CAUTIOUS TO POSSIBLE FLOODING OF LOW LYING..FLOOD PRONE AREA. WACO
HAS ALREADY RECEIVED 2.88 INCHES OF RAIN SINCE MIDNIGHT...WITH
OTHER AREAS AROUND CENTRAL TEXAS REPORTING UP TO 4.00 INCHES.

STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS
OR ADVISORIES.

TXZ031-072000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
101 PM CST WED MAR 7 1990

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR BOSQUE AND HILL
COUNTIES OF CENTRAL TEXAS UNTIL 200 PM CST...
...A FLASH FLOOD WATCH IS IN EFFECT FOR CENTRAL TEXAS THIS
AFTERNOON...
...THE SEVERE THUNDERSTORM WARNING FOR MCLENNAN COUNTY IS NO LONGER
IN EFFECT...

AT 1255 PM POSSIBLE SEVERE THUNDERSTORMS WERE LOCATED JUST SOUTHWEST
OF CLIFTON...AND SOUTH OF HILLSBORO...MOVING NORTHEAST 40 MILES AN
HOUR.

OTHERWISE...THUNDERSTORMS AND SHOWERS...SOME WITH VERY HEAVY RAIN...
COVERED MOST OF CENTRAL TEXAS. MOVEMENT OF INDIVIDUAL SHOWERS WAS
TO THE NORTHEAST 40 MILES AN HOUR.

PERSONS LIVING IN...AND MOTORIST DRIVING THROUGH CENTRAL TEXAS SHOULD
BE ALERT TO FLOODING OF ROADWAYS...LOW LYING AND FLOOD PRONE AREAS.

STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS.

TXZ031-072145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
245 PM CST WED MAR 7 1990

...A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR CENTRAL TEXAS...

AT 240 PM CST MOSTLY SHOWERS AND LIGHT RAIN...WITH AN OCCASIONAL
THUNDERSTORM...COVERED MOST OF CENTRAL TEXAS...MOVING NORTHEAST
45 MILES AN HOUR.

AT 110 PM CST DIME SIZE HAIL 4 MILES SOUTH OF CLIFTON IN BOSQUE
COUNTY...AND AT 143 PM CST PEA SIZE HAIL REPORTED IN HILLSBORO.

PERSONS DRIVING THROUGH...OR LIVING IN CENTRAL TEXAS SHOULD BE ALERT
TO POSSIBLE FLOODING OF LOW LYING FLOOD PRONE AREAS.

STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS
OR ADVISORIES.

TXZ021>023-026>028-031>033-081000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
330 PM CST WED MAR 7 1990

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
NORTHEAST AND NORTH CENTRAL TEXAS THE REMAINDER OF THIS AFTERNOON
AND TONIGHT. THE AREA IS THAT PART OF NORTH TEXAS EAST OF A LINE
THROUGH PARIS...DALLAS...AND LAMPASAS.

AT MID AFTERNOON...THUNDERSTORMS WERE CONTINUING IN A NARROW BAND
FROM LAMPASAS TO WAXAHACHIE TO CANTON TO TEXARKANA. THIS WAS
OCCURING IN RESPONSE TO WEAK IMPULSES OF ENERGY MOVING ALONG
IN THE SUBTROPICAL JET STREAM OVER THE AREA. THE RAIN-COOLED
BOUNDARY THAT WAS LOCATED THROUGH PALESTINE AND LONGVIEW THIS
MORNING HAD RETREATED NORTHWEST THIS AFTERNOON...AS SOUTHEAST
WINDS BROUGHT ABUNDANT LOW LEVEL MOISTURE INTO THE THUNDERSTORM
AREA. THUNDERSTORM DEVELOPMENT WAS SLIGHTLY INHIBITED...HOWEVER...
BY THICK CLOUD COVER WHICH WAS KEEPING SURFACE TEMPERATURES IN
THE LOW AND MID 70S.

MEANWHILE...THE LEADING EDGE OF SOME DRIER AIR WAS MOVING SLOWLY EAST
THROUGH NORTH CENTRAL TEXAS. AT MID AFTERNOON THIS DRY LINE WAS
LOCATED APPROXIMATELY FROM GAINESVILLE TO MINERAL WELLS TO
LAMPASAS. WHILE CLOUD COVER DIMINISHED BEHIND THIS LINE...
SURFACE TEMPERATURES WERE STILL RELATIVELY COOL...SO THE DRY
LINE WAS NOT YET A STRONG CONTRIBUTOR TO SEVERE WEATHER
DEVELOPMENT. THIS COULD CHANGE...HOWEVER...BEFORE SUNSET WHEN
THE CONTRIBUTION FROM AFTERNOON HEATING WOULD END.

WHILE LOW LEVEL WINDS WERE MODERATELY STRONG IN THE THE UNDISTURBED
AIR OVER THE SOUTHEAST PARTS OF NORTH TEXAS...ELSEWHERE A MORE
CHAOTIC PATTERN WAS EVIDENT. THUS THE BEST CHANCE FOR STRONG
WINDS OR TORNADOES REMAINED ALONG THE LEADING EDGE OF RAIN COOLED
AIR...OR ROUGHLY ALONG A LINE FROM TEMPLE TO SHREVEPORT.
FURTHER NORTH...THE MAIN PROBLEM IS EXPECTED TO BE LARGE HAIL.

HEAVY RAIN IS ALSO A POSSIBILITY...AND A FLASH FLOOD WATCH IS
IN EFFECT FOR MUCH OF THE SAME AREA WITH POTENTIAL SEVERE WEATHER.

EMERGENCY MANAGEMENT OFFICIALS AND SPOTTERS WILL WANT TO KEEP
IN TOUCH WITH LATEST WEATHER DEVELOPMENTS THE REMAINDER OF THIS
AFTERNOON AND TONIGHT.