Tornado Warning 40, NWS Fort Worth, TX

TXZ019>033-272200-

SEVERE WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FT WORTH TX
1156 AM CDT FRI APR 27 1990

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT OVER NORTHEAST TEXAS...GENERALLY NORTHEAST OF A LINE FROM
BONHAM...TO ATHENS...TO LUFKIN.  THERE IS A SLIGHT RISK OF SEVERE
THUNDERSTORMS IN A RATHER NARROW BAND JUST TO THE WEST OF THE MODERATE
RISK AREA...GENERALLY EAST OF A LINE FROM SHERMAN...TO DALLAS...TO
CENTERVILLE.

SOME OF THE STRONGER STORMS COULD PRODUCE LARGE HAIL AND DAMAGING
WINDS. ISOLATED TORNADOES WILL ALSO BE POSSIBLE.

THIS MORNING`S UPPER AIR DATA SHOWED THE BASE OF A DIGGING LOW
PRESSURE TROUGH TO BE FROM THE TEXAS PANHANDLE SOUTHEASTWARD INTO
SOUTH CENTRAL TEXAS.  NORTHWEST FLOW ON THE BACK SIDE OF THIS
NEGATIVELY TILTED TROUGH WILL BE BRINGING CONSIDERABLE COLD ADVECTION
INTO NORTH TEXAS IN THE MID LEVELS THIS AFTERNOON AND TONIGHT.

AT MID DAY...A SOUTHEASTWARD MOVING COLD FRONT WAS LOCATED NEAR A LINE
FROM ARDMORE...TO BRECKENRIDGE...TO SAN ANGELO.  MOISTURE WAS QUITE
SHALLOW OVER THE WESTERN HALF OF NORTH TEXAS THIS MORNING...BUT OVER
NORTHEAST TEXAS MOISTURE EXTENDED UP TO ABOUT 6 THOUSAND FEET.  ABOVE
THIS MOIST LAYER...THE MID LEVELS WERE QUITE DRY...WITH SOME HIGH
LEVEL MOISTURE STILL PRESENT.

WITH THE STRONG COLD AIR ADVECTION AT MID LEVELS...RAPID
DESTABILIZATION OF THE AIR MASS IS EXPECTED OVER NORTH TEXAS DURING
THE AFTERNOON...ESPECIALLY OVER EASTERN PORTIONS OF THE AREA WHERE LOW
LEVEL MOISTURE IS PLENTIFUL.  SURFACE TEMPERATURES ARE EXPECTED TO
WARM INTO THE UPPER 70S TO NEAR 80 IN THE AREA AHEAD OF THE
APPROACHING COLD FRONT...RESULTING IN LIFTED INDICES IN THE MINUS 6 TO
MINUS 8 RANGE IN NORTHEAST TEXAS BY LATE AFTERNOON.

AT THIS TIME IT APPEARS THAT THUNDERSTORMS WILL DEVELOP ALONG THE COLD
FRONT EARLY THIS AFTERNOON FROM NEAR GAINESVILLE TO WEATHERFORD...
THEN MOVE RAPIDLY EASTWARD WITH THE UPPER FLOW.  THUNDERSTORMS ARE
EXPECTED TO BECOME SEVERE JUST EAST OF DALLAS BY MID AFTERNOON AS THEY
MOVE INTO THE MORE UNSTABLE AIR.

SPOTTER ACTIVATION MAY BE NECESSARY BY MID AFTERNOON ALONG THE WESTERN
BOUNDARY OF THE SLIGHT RISK AREA...AND OVER THE REST OF NORTHEAST
TEXAS LATER THIS AFTERNOON AND EARLY TONIGHT.

TXZ031-272053-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
253 PM CDT FRI APR 27 1990

...THUNDERSTORMS DEVELOPING RAPIDLY OVER NORTH CENTRAL TEXAS...

AT 242 PM CDT SCATTERED THUNDERSTORMS WERE DEVELOPING RAPIDLY OVER
NORTHERN BOSQUE COUNTY AND EXTENDED NORTHWEST TOWARDS STEPHENVILLE AND
NORTHEAST TO NEAR CROWLEY. A THUNDERSTORM WITH VERY HEAVY RAIN WAS
NEAR WALNUT SPRINGS.

RESIDENTS IN NORTHERN BOSQUE AND HILL COUNTIES SHOULD EXPECT BRIEF
HEAVY RAINS...STRONG GUSTY WINDS...POSSIBLE SMALL HAIL AND DANGEROUS
CLOUD TO GROUD LIGHTNING. MOVEMENT ON THESE STORMS HAD NOT BEEN
DETERMINED.

A COLD FRONT IS PUSHING INTO NORTH CENTRAL TEXAS...AND COMBINED WITH
MOIST LOW LEVEL FLOW FROM THE SOUTHEAST...AND AN UNSTABLE ATMOSPHERE
...THESE STORMS MAY REACH SEVERE LEVELS. <

STAY TUNED TO NOAA WEATHER RADIO FOR ADDITIONAL INFORMATION.

07

TXZ020>023-025>028-031>033-272100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
330 PM CDT THU APR 26 1990

A TORNADO WATCH HAS BEEN ISSUED FOR A LARGE PART OF NORTH CENTRAL AND
NORTHEAST TEXAS UNTIL 1000 PM.

OVER NORTH CENTRAL TEXAS... RADAR AT 330 PM SHOWED A THUNDERSTORM
BETWEEN MCKINNEY AND DENTON ... AND BETWEEN WEATHERFORD AND FORT
WORTH. ANOTHER STRONG THUNDERSTORMS WAS LOCATED BETWEEN CLEBURNE AND
HILLSBORO. MOVEMENT WAS EAST AROUND 15 MPH.

OVER NORTHEAST TEXAS... RADAR AT 330 PM SHOWED STRONG THUNDERSTORMS
OVER BOWIE COUNTY BETWEEN TEXARKANA AND CLARKSVILLE... AND OVER MORRIS
COUNTY NEAR DAINGERFIELD. MOVEMENT WAS EAST AROUND 15 MPH.

CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERTORMS DUE TO STRONG
VERTICAL WIND SHEARS AND MODERATELY STRONG INSTABILITIES. LARGE HAIL
AND A FEW TORNADOES ARE POSSIBLE. THE SEVERE WEATHER THREAT WILL END
FROM WEST TO EAST THIS AFTERNOON AS A COLD FRONT PUSHES THOUGH NORTH
TEXAS. IN THE MEANTIME... SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS
SHOULD KEEP IN TOUCH WITH LATEST WEATHER DEVELOPMENTS AND BE READY FOR
ACTIVATION SHOULD SEVERE WEATHER THREATEN OR A WARNING BE ISSUED.

LATE REPORT...PEA SIZED HAIL AT DAINGERFCIELD AT 330 PM.

TXZ031-272145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
337 PM CDT FRI APR 27 1990

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR NORTHERN HILL
COUNTY UNTIL 415 PM CDT...
...A TORNADO WATCH IS IN EFFECT FOR ALL OF NORTH CENTRAL TEXAS
UNTIL 1000 PM CDT...

AT 330 PM RADAR SHOWED A POSSIBLE SEVERE THUNDERSTORM 10 MILES WEST
OF ITASCA...MOVING SOUTHEAST 30 MILES AN HOUR.

OTHERWISE...A CLUSTER OF STRONG THUNDERSTORMS WERE SCATTERED THROUGH
BOSQUE AND HILL COUNTIES...MOVING SOUTHEAST 30 MILES AN HOUR.

PERSONS IN THE MENTIONED AREAS SHOULD BE ALERT TO STRONG GUSTY
WINDS...LARGE HAIL...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN.

ALSO...ANYTIME YOU HAVE A SEVERE THHUNDERSTORM IN A TORNADO WATCH
AREA THERE EXISTS A GOOD POSSIBILITY OF THIS STORM PRODUCING A
TORNADO.

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