

024 

WWUS20 KWNS 130133

SEL8

SPC WW 130133

KSZ000-MOZ000-130500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 158

NWS STORM PREDICTION CENTER NORMAN OK

825 PM CDT WED MAY 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME NORTHEAST KANSAS

       NORTHERN MISSOURI



EFFECTIVE THIS WEDNESDAY NIGHT FROM 825 PM UNTIL MIDNIGHT CDT.



HAIL TO 2 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 40

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

OF SAINT JOSEPH MISSOURI TO 55 MILES EAST OF KIRKSVILLE MISSOURI.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 155...WW 156...WW 157...



DISCUSSION...STORMS WILL INCREASE ACROSS THE WATCH AREA THROUGH LATE

EVENING AS WEAK FRONTAL WAVE DEVELOPS EWD FROM KS AND LOW LEVEL JET

INTENSIFIES AND AIDS LOW LEVEL ASCENT ACROSS WEST-EAST WARM FRONT

OVER NCNTRL MO. WARM AND MOIST AIR MASS FUELING THIS DEVELOPMENT

WILL SUPPORT VIGOROUS STORM UPDRAFTS WHILE LARGE SCALE FORCING AND

STRONG SHEAR CONTRIBUTE TO STORM ORGANIZATION AND PERSISTENCE. MID

LEVEL JET STREAK OF 60KT ACROSS ERN KS WILL BE ORIENTED

PREFERENTIALLY INTO NW-SE BANDS OF FAST-MOVING STORMS AND FURTHER

SUPPORT THE POTENTIAL FOR DAMAGING WIND EVENT TO EVOLVE...ESPECIALLY

ALONG/NEAR RETREATING WARM FRONT AND RESIDUAL OUTFLOW BOUNDARIES

OVER THE AREA.



AVIATION...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 24050.





...CARBIN

