

118 

WWUS20 KWNS 270247

SEL4

SPC WW 270247

ILZ000-KYZ000-MOZ000-270900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 34

NWS STORM PREDICTION CENTER NORMAN OK

850 PM CST THU FEB 26 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN ILLINOIS

       WESTERN KENTUCKY

       SOUTHEAST MISSOURI



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 850 PM

UNTIL 300 AM CST.



HAIL TO 1 INCH 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 EAST AND WEST OF A LINE FROM 25 MILES SOUTHWEST OF

POPLAR BLUFF MISSOURI TO 35 MILES NORTH OF CARBONDALE ILLINOIS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 32...WW 33...



DISCUSSION...SCTD TSTMS/POSSIBLE SUPERCELLS EXPECTED TO PERSIST

ALONG/JUST AHEAD OF COLD FRONT MOVING E IN EXIT REGION OF 60 KT MID

LVL JET STREAK.  ALTHOUGH DIURNAL COOLING WILL FURTHER STABILIZE

BOUNDARY LAYER...CORRIDOR OF GREATER MOISTURE INFLOW ALONG THE MS

RVR VLY MAY SUPPORT STORM SUSTENANCE/SVR POTENTIAL THROUGH EARLY

FRI.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION

VECTOR 27040.





...CORFIDI

