

000 

WWUS20 KWNS 241941

SEL6

SPC WW 241941

ARZ000-OKZ000-TXZ000-250400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 176

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT TUE APR 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       SOUTHEAST OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2 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 50 MILES NORTHWEST OF

TEXARKANA ARKANSAS TO 5 MILES SOUTH SOUTHWEST OF CORSICANA TEXAS.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 172...WW 173...WW

174...WW 175...



DISCUSSION...SLIGHTLY ELEVATED TSTMS/POSSIBLE SUPERCELLS EXPECTED TO

INCREASE IN COVERAGE AND POSSIBLY BUILD DOWN INTO THE BOUNDARY LAYER

AS HEATING FURTHER DESTABILIZES REGION.  ADDITIONAL STORMS MAY MOVE

INTO WW THIS EVENING AS ACTIVITY PROPAGATES E FROM CNTRL TX.

STRENGTHENING/ VEERING WIND PROFILES AND RICH BOUNDARY LAYER

MOISTURE SUGGEST GOOD CHANCE FOR TORNADOES IN ADDITION TO HAIL/HIGH

WIND.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23040.





...CORFIDI

