

982 

WWUS20 KWNS 122243

SEL7

SPC WW 122243

KSZ000-MOZ000-130500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 157

NWS STORM PREDICTION CENTER NORMAN OK

540 PM CDT WED MAY 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN KANSAS

       WESTERN MISSOURI



EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 540 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 35 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST NORTHWEST OF

OLATHE KANSAS TO 60 MILES EAST NORTHEAST OF KNOB NOSTER MISSOURI.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 154...WW 155...WW 156...



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO CONTINUE TO INCREASE

ACROSS EASTERN KANSAS AND WESTERN MISSOURI TONIGHT. THIS ACTIVITY

HAS BEEN DEVELOPING NEAR A WEAK FRONTAL WAVE IN EASTERN KANSAS AND

THEN SPREADING ENEWD ALONG A WARM FRONT SITUATED W-E ACROSS

MISSOURI. LARGE SCALE ASCENT ACROSS THE REGION IS FORECAST TO

STRENGTHEN TONIGHT. IN ADDITION...ENHANCED MASS TRANSPORT ON THE

NOSE OF NOCTURNAL LOW LEVEL JET SHOULD RESULT IN ROBUST AND MORE

WIDESPREAD DEVELOPMENT OVER THE NEXT SEVERAL HOURS. LOW LEVEL SHEAR

PROFILES AND HIGH BOUNDARY LAYER RH ALONG THE WARM FRONT SHOULD

FAVOR TORNADO POTENTIAL WITH DISCRETE STORMS EITHER TRACKING ALONG

OR ACROSS THIS ZONE. AS COVERAGE OF STORMS INCREASES...EXPECT MCS

DEVELOPMENT LATER TONIGHT WITH HAIL/WIND AND EXTREME RAINFALL

POSSIBILITIES ALL INCREASING.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 23040.





...CARBIN

