

836 

WWUS20 KWNS 192259

SEL3

SPC WW 192259

INZ000-MIZ000-OHZ000-LMZ000-200700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 483

NWS STORM PREDICTION CENTER NORMAN OK

700 PM EDT FRI JUN 19 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN INDIANA

       EXTREME SOUTHERN LOWER MICHIGAN

       WEST CENTRAL AND NORTHWEST OHIO

       LAKE MICHIGAN



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 700 PM

UNTIL 300 AM EDT.



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

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF SOUTH

BEND INDIANA TO 40 MILES SOUTHEAST OF INDIANAPOLIS INDIANA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 478...WW 480...WW

481...WW 482...



DISCUSSION...ISOLATED SUPERCELLS ALONG A SLOW-MOVING OUTFLOW

BOUNDARY ACROSS NRN INDIANA MAY CONTINUE TO WEAKEN THIS EVENING.

HOWEVER...A LARGE DEVELOPING MCS TO THE W IN IL WILL MOVE ACROSS

INDIANA AND INTO OH LATE THIS EVENING INTO TONIGHT...WITH AN

ACCOMPANYING THREAT FOR WIDESPREAD DAMAGING WINDS.

ADDITIONALLY...THERE WILL BE SOME POTENTIAL FOR A FEW TORNADOES

WHERE THE MORE DISCRETE STORMS MERGE WITH THE LARGER MCS...AND WHERE

THE MCS INTERACTS WITH THE PRE-EXISTING OUTFLOW BOUNDARIES ACROSS

INDIANA/OH.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 27045.





...THOMPSON

