

778 

WWUS20 KWNS 081945

SEL5

SPC WW 081945

KSZ000-MOZ000-090200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 285

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT TUE JUN 8 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN AND SOUTHERN KANSAS

       WESTERN AND NORTHERN MISSOURI



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

900 PM 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES WEST NORTHWEST OF

CHILLICOTHE MISSOURI TO 65 MILES SOUTHEAST OF WICHITA KANSAS.

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.



DISCUSSION...STORMS ARE EXPECTED TO DEVELOP SHORTLY AHEAD OF A COLD

FRONT THAT STRETCHED FROM NWRN MO SWWD INTO SOUTHWESTERN KANSAS. AIR

MASS HAS BECOME EXTREMELY UNSTABLE WITH MLCAPES APPROACHING 4000

J/KG. THIS INSTABILITY PLUS EFFECTIVE SHEAR AT 40 KT WOULD FAVOR

INTENSE SUPERCELLS. WHILE LARGE HAIL INITIALLY WILL BE THE GREATEST

THREAT...THE VERY MOIST BOUNDARY LAYER AND STRONG LOW LEVEL SHEAR

...ESPECIALLY NEAR OUTFLOW BOUNDARY LOCATED IN WRN MO/ERN KS...

WOULD SUPPORT TORNADOES. LATER THIS EVENING...THE STORMS ARE

EXPECTED TO CONSOLIDATE INTO A LINEAR MCS...WITH WIND DAMAGE

EVENTUALLY BECOMING THE GREATER THREAT.



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 28025.





...IMY

