

007 

WWUS20 KWNS 120417

SEL3

SPC WW 120417

KSZ000-121200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 153

NWS STORM PREDICTION CENTER NORMAN OK

1120 PM CDT TUE MAY 11 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF SOUTHERN AND CENTRAL KANSAS



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1120 PM

UNTIL 700 AM 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF

GARDEN CITY KANSAS TO 50 MILES EAST NORTHEAST OF CHANUTE KANSAS.

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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 152. WATCH NUMBER 152 WILL NOT BE IN EFFECT

AFTER 1120 PM CDT.



DISCUSSION...WITH THE STRENGTHENING LOW LEVEL JET AND CONTINUED

SURGING OF VERY MOIST UNSTABLE AIR MASS NWD ACROSS THE WARM FRONT

ALONG KS/OK BORDER...CONDITIONS ARE VERY FAVORABLE FOR ELEVATED

SUPERCELL DEVELOPMENT.  THE PRIMARY THREAT WILL BE LARGE HAIL

ASSOCIATED WITH ANY SUPERCELL ALONG WITH LOCAL DAMAGING WINDS WHERE

STORMS CAN DEVELOP INTO SHORT LINE SEGMENTS.



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 24035.





...HALES

