

778 

WWUS20 KWNS 080139

SEL6

SPC WW 080139

KSZ000-MOZ000-080900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 46

NWS STORM PREDICTION CENTER NORMAN OK

735 PM CST SAT MAR 7 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME EAST CENTRAL KANSAS

       NORTHWEST INTO NORTH CENTRAL MISSOURI



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 735 PM

UNTIL 300 AM CST.



HAIL TO 1.5 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH

SOUTHEAST OF KIRKSVILLE MISSOURI TO 25 MILES WEST SOUTHWEST OF

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 45...



DISCUSSION...ONGOING CLUSTERS OF SEVERE STORMS WILL CONTINUE TO

SPREAD ENEWD ALONG A STATIONARY FRONT INTO THE KANSAS CITY AREA

AROUND 03Z...AND AREAS FARTHER TO ENE IN MO THROUGH THE OVERNIGHT

HOURS.  THE 00Z TOP SOUNDING APPEARED TO BE REPRESENTATIVE OF THE

ENVIRONMENT NEAR THE FRONT...WITH MUCAPE JUST UNDER 1000 J/KG.  THIS

INSTABILITY WILL BE SUFFICIENT FOR LARGE HAIL GIVEN THE COOL MID

LEVEL TEMPERATURES... WHILE EFFECTIVE BULK SHEAR AOA 50 KT AND

INCREASING LOW-LEVEL SHEAR WILL SUPPORT SUPERCELLS AND EMBEDDED

BOWS.  WARM SECTOR MOISTURE/INSTABILITY ARE NOT PARTICULARLY LARGE

AND SOME CONVECTIVE INHIBITION REMAINS...SO THE STORMS SHOULD REMAIN

CLOSE TO THE FRONT THROUGH MUCH OF THE NIGHT.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 25040.





...THOMPSON

