

764 

WWUS20 KWNS 092333

SEL4

SPC WW 092333

OKZ000-TXZ000-100700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 154

NWS STORM PREDICTION CENTER NORMAN OK

630 PM CDT MON APR 9 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN OKLAHOMA

       WESTERN NORTH TEXAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 630 PM UNTIL

200 AM CDT.



TORNADOES...HAIL TO 4 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF

ALVA OKLAHOMA TO 40 MILES WEST SOUTHWEST OF WICHITA FALLS TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 151...WW 152...WW 153...



DISCUSSION...SUPERCELL COMPLEX NOW NEAR WOODWARD OK...WITH VERY

LARGE HAIL AND RECENT TORNADOES...EXPECTED TO MOVE GENERALLY

SSE...INTO ENVIRONMENT THAT WILL REMAIN SUPPORTIVE OF A CONTINUED

LARGE HAIL/OCCASIONAL TORNADO THREAT.  FARTHER SSW...CONFIGURATION

OF STORMS IN SE TX PANHANDLE HAS EVOLVED IN SUCH A WAY THAT

ASSOCIATED COLD POOL IS NOT VERY LARGE/STRONG.  AS THE MAIN

STORM...AND SMALLER CELLS AHEAD OF IT...CONTINUE SEWD...THE ACTIVITY

WILL ENCOUNTER AN INCREASINGLY FAVORABLE LOW LVL ENVIRONMENT

/MOISTURE AND BACKED SFC FLOW/ FOR TORNADOES...IN ADDITION TO LARGE

HAIL.  THIS THREAT MAY CONTINUE WELL AFTER DARK AS LLJ IS EXPECTED

TO SOMEWHAT STRENGTHEN AND VEER ACROSS THE REGION.



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

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 30020.





...CORFIDI

