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WWUS20 KWNS 051849

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 620

NWS STORM PREDICTION CENTER NORMAN OK

245 PM EDT WED SEP 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEAST ILLINOIS

       SOUTHEAST INDIANA

       WESTERN AND CENTRAL KENTUCKY

       SOUTHWEST OHIO



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 245 PM UNTIL

1100 PM EDT.



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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF

CINCINNATI OHIO TO 30 MILES SOUTHWEST OF BOWLING GREEN KENTUCKY.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 619...



DISCUSSION...STORMS IN SRN IND SQLN LINE SHOULD MOVE GENERALLY

EWD...WITH PREFERRED NEW DEVELOPMENT EXPECTED TO BE TOWARD THE S.

THIS MAY YIELD A ROUGHLY ESE OR SE OVERALL MCS MOTION. DIURNAL

HEATING...PRESENCE OF RICH LOW-LVL MOISTURE AND EWD-MOVING MO/IL UPR

IMPULSE SUGGEST CONTINUED POTENTIAL FOR SMALL BOWS WITH LOCALLY DMGG

WIND/MARGINALLY SVR HAIL. ISOLD STORMS MAY FORM AHEAD OF LINE IF

ELEVATED CONVECTION NOW OVER WRN KY ROOTS INTO THE BOUNDARY

LAYER...AND/OR OTHER STORMS FORM IN WEAKLY CONVERGENT LOW-LVL FLOW

OVER CNTRL KY/SE IND.



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 500. MEAN STORM

MOTION VECTOR 29025.





...CORFIDI

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