[LeArc] Weather Watch : 0@ 4/21/02 5:21:23 PM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


WWUS20 KWNS 212220
SEL0  
SPC WW 212214
ILZ000-INZ000-KYZ000-OHZ000-220300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 140
STORM PREDICTION CENTER NORMAN OK
614 PM EDT SUN APR 21 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

EXTREME SOUTHEASTERN ILLINOIS                           
SOUTHERN INDIANA                             
NORTHERN KENTUCKY                           
SOUTHWESTERN OHIO                               

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 630 PM UNTIL 1100
PM EDT.

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 ALONG AND 100 STATUTE MILES
EAST AND WEST OF A LINE FROM 30 MILES SOUTH SOUTHWEST OF OWENSBORO
KENTUCKY TO 70 MILES NORTH OF LEXINGTON KENTUCKY.

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 137...TORNADO WATCH NUMBER 139. 
WATCH NUMBER 137...139 WILL NOT BE IN EFFECT AFTER 630 PM EDT. 
CONTINUE...WW 138...

DISCUSSION...A CLUSTER OF SEVERE STORMS WILL CONTINUE TO MOVE EWD
THIS EVENING ALONG THE OH RIVER IN ADVANCE OF A SURFACE LOW ALONG
AN E-W SURFACE FRONT.  VERTICAL SHEAR WILL REMAIN SUFFICIENT FOR
SUPERCELLS WITHIN THE WATCH AREA...BUT RELATIVELY VEERED LOW-LEVEL
WINDS AND AT BEST MODEST LOW-LEVEL SHEAR...ALONG WITH GRADUALLY
WEAKENING INSTABILITY...ALL SUGGEST THE PRIMARY SEVERE THREATS WILL
BE LARGE HAIL AND DAMAGING WINDS FOR THE NEXT SEVERAL HOURS.  OTHER
ELEVATED STORMS CAPABLE OF PRODUCING LARGE HAIL WILL ALSO CONTINUE
ACROSS SW OH. 

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 27040.


...THOMPSON

;390,0824 371,0853 371,0891 390,0862;