

239 

WWUS20 KWNS 010258

SEL5

SPC WW 010258

OKZ000-TXZ000-010700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 215

NWS STORM PREDICTION CENTER NORMAN OK

950 PM CDT MON APR 30 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN OKLAHOMA

       WESTERN NORTH TEXAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 950 PM UNTIL

200 AM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTH SOUTHEAST OF

FORT SILL OKLAHOMA TO 60 MILES NORTHWEST OF CHANDLER OKLAHOMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 210...WW 211...WW

212...WW 213...WW 214...



DISCUSSION...SUPERCELL COMPLEX IN SW OK EXPECTED MOVE/DEVELOP E OR

ESE THROUGH EARLY TUE AS LLJ CONTINUES TO STRENGTHEN AND SLIGHTLY

VEER IN RESPONSE TO PASSING UPR IMPULSE NOW OVER SW KS.  QUALITY OF

MOISTURE...STEEP MID LVL LAPSE RATES...AND 30+ KT WLY 700 MB FLOW

SUGGEST A CONTINUED RISK FOR A FEW LOW LVL MESOS AND POSSIBLE

TORNADOES...IN ADDITION TO A CONTINUED RISK FOR LARGE HAIL AND AN

INCREASING RISK FOR DMGG WIND.  FARTHER N...SUSTAINED MOIST SLY FLOW

SUGGESTS THAT OTHER STORMS MAY FORM SW OF CURRENT N CNTRL OK

SUPERCELL COMPLEX.  IF THIS DOES OCCUR...THE STORMS SHOULD MOVE

MAINLY EWD...AFFECTING AREAS FROM ENID S AND SE INTO THE OKC AND

STILLWATER AREAS WITH LARGE HAIL...DMGG WIND...AND PERHAPS A COUPLE

TORNADOES BEFORE ACTIVITY EVOLVES INTO AN MCS.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 28030.





...CORFIDI

