

573 

WWUS20 KWNS 222035

SEL3

SPC WW 222035

KSZ000-NEZ000-OKZ000-230400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 383

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT TUE JUN 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN KANSAS

       PARTS OF SOUTHWESTERN NEBRASKA

       OKLAHOMA PANHANDLE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1100 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTHEAST OF

GUYMON OKLAHOMA TO 15 MILES NORTHWEST OF MCCOOK NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 381...WW 382...



DISCUSSION...A HOT...MODERATELY UNSTABLE AIR MASS ACROSS THE WATCH

AREA IS SUPPORTING DEVELOPMENT OF STRONG/SEVERE THUNDERSTORMS.  WITH

VERY STEEP LAPSE RATES...30KT OF SHEAR...DAMAGING WINDS AND LARGE

HAIL WILL BE ASSOCIATED WITH THE MOST INTENSE STORMS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 22020.





...HALES

