

000 

WWUS20 KWNS 221907

SEL5

SPC WW 221907

ARZ000-MOZ000-OKZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 215

NWS STORM PREDICTION CENTER NORMAN OK

210 PM CDT TUE APR 22 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHWEST ARKANSAS

       PARTS OF SOUTHWEST MISSOURI

       MUCH OF EASTERN OKLAHOMA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

900 PM CDT.



HAIL TO 2.5 INCHES 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 EAST AND WEST OF A LINE FROM 25 MILES SOUTH

SOUTHEAST OF ARDMORE OKLAHOMA TO 15 MILES NORTHEAST OF MONETT

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 214...



DISCUSSION...THUNDERSTORMS WILL DEVELOP RAPIDLY ALONG/AHEAD OF COLD

FRONT AS AIRMASS NOW VERY UNSTABLE WITH LITTLE REMAINING CINH.

PRIMARY SEVERE THREAT WILL BE LARGE HAIL GIVEN THE WEAKLY SHEARED

ENVIRONMENT.  DAMAGING DOWNBURSTS WILL BE POSSIBLE ASSOCIATED WITH

STRONGEST STORMS AND MULTICELL CLUSTERS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 32015.





...HALES

