

000 

WWUS20 KWNS 100857

SEL7

SPC WW 100857

ARZ000-OKZ000-TXZ000-101700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 187

NWS STORM PREDICTION CENTER NORMAN OK

355 AM CDT THU APR 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       EASTERN AND SOUTHERN OKLAHOMA

       NORTHERN...CENTRAL AND EASTERN TEXAS



EFFECTIVE THIS THURSDAY MORNING FROM 355 AM UNTIL NOON CDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES EAST SOUTHEAST OF

TEMPLE TEXAS TO 25 MILES NORTHWEST OF HARRISON ARKANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 184...WW 185...WW 186...



DISCUSSION...N TX/SRN OK DERECHO SQLN WITH EMBEDDED

LEWPS/SUPERCELLS SHOULD CONTINUE ENEWD...WITH CONTINUING THREAT FOR

HIGH WIND/ISOLATED TORNADOES AND HAIL.  A FEW MORE DISCRETE STORMS

MAY FORM IMMEDIATELY AHEAD OF LINE...AND NEAR SLIGHTLY ELEVATED WARM

FRONT IN NE OK/NW AR.  STRENGTHENING WIND FIELD DOWNSTREAM FROM W TX

UPR TROUGH...AND VERY MOIST/BROAD WARM SECTOR WILL COMPENSATE FOR

UNFAVORABLE TIME OF DAY.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 25050.





...CORFIDI

