

009 

WWUS20 KWNS 160451

SEL9

SPC WW 160451

KSZ000-161000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 429

NWS STORM PREDICTION CENTER NORMAN OK

1150 PM CDT MON JUN 15 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN KANSAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1150 PM

UNTIL 500 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST

NORTHWEST OF HUTCHINSON KANSAS TO 35 MILES NORTHEAST OF CHANUTE

KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 426. WATCH NUMBER 426 WILL NOT BE IN EFFECT

AFTER 1150 PM CDT. CONTINUE...WW 424...WW 425...WW 427...WW 428...



DISCUSSION...ELEVATED STORMS HAVE DEVELOPED NORTH OF THE OUTFLOW

BOUNDARY ACROSS SRN KS IN RESPONSE TO INCREASINGLY STRONG WARM

ADVECTION ASSOCIATED WITH THE NOCTURNAL LOW LEVEL JET FROM OK INTO

KS.  AIR MASS OVER OK THAT IS FEEDING INTO THE STORMS HAS NOT BEEN

MODIFIED BY EARLIER CONVECTION WITH CAPE OF 2000-2500 J/KG

SUPPORTING STRONG/SEVERE CONVECTION.  PRIMARY THREAT IS EXPECTED TO

BE LARGE HAIL GIVEN ELEVATED NATURE OF STORMS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...WEISS

