WATCHES: Severe Thunderstorm Watch Number 19

WWUS20 KWNS 101408
SEL9
SPC WW 101408
TXZ000-102100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 19
NWS STORM PREDICTION CENTER NORMAN OK
810 AM CST WED MAR 10 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL TEXAS

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 810 AM UNTIL
300 PM CST.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST
OF STEPHENVILLE TEXAS TO 65 MILES NORTHEAST OF CORSICANA TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...TSTMS HAVE FORMED IN THE PAST HOUR OVER NW TX...ALONG
LEADING EDGE OF STRONG FORCING FOR ASCENT ASSOCIATED WITH ERN NM UPR
VORT. AS UPR VORT CONTINUES ENEWD...AND BOUNDARY LAYER WARMS AND
MOISTENS AHEAD OF IT...STORMS MAY BUILD SWD INTO CNTRL TX...AND
POSSIBLY NWD TO THE RED RVR. POTENTIAL MAY DEVELOP FOR SVR SFC
WINDS AND HAIL AS 700 MB FLOW INCREASES TO AOA 50 KTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION
VECTOR 25050.

...CORFIDI

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