

607 

WWUS20 KWNS 152341

SEL9

SPC WW 152341

INZ000-OHZ000-160600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 309

NWS STORM PREDICTION CENTER NORMAN OK

740 PM EDT FRI MAY 15 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF CENTRAL AND NORTHERN INDIANA

       WEST CENTRAL AND SOUTHWEST OHIO



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 740 PM

UNTIL 200 AM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST SOUTHWEST OF

LAFAYETTE INDIANA TO 40 MILES EAST NORTHEAST OF DAYTON OHIO.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 305...WW 306...WW

307...WW 308...



DISCUSSION...STRONG/SEVERE STORMS CONTINUE MOVING EWD ACROSS IL

INVOF W-E WARM FRONT...WHILE ADDITIONAL CELLS CONTINUE TO INTENSIFY

AS THEY SPREAD NWD ACROSS SRN INDIANA AND SOUTHWEST OHIO.  FAVORABLE

DEEP-LAYER SHEAR EITHER SIDE OF THE WARM FRONT -- AND ENHANCED

LOW-LEVEL SHEAR NEAR THE BOUNDARY -- ALONG WITH FAVORABLY-UNSTABLE

ENVIRONMENT SUGGESTS THAT THE THREATS FOR DAMAGING WINDS AND LARGE

HAIL WILL CONTINUE....ALONG WITH THE POSSIBILITY OF ISOLATED

TORNADOES.



AVIATION...TORNADOES AND 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 23035.





...GOSS

