This is for much of the northern half of the state in the overnight. The primary threat is from damaging wind.
THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHERN INDIANA SOUTHERN MICHIGAN LAKE MICHIGAN * EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1135 PM UNTIL 400 AM EDT. * PRIMARY THREATS INCLUDE... SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 80 MPH POSSIBLE A TORNADO OR TWO POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF SOUTH BEND INDIANA TO 35 MILES EAST SOUTHEAST OF LAFAYETTE INDIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 376...WW 377...WW 378...WW 379...WW 380... DISCUSSION...ORGANIZED LINE OF STORMS EMBEDDED WITHIN STRONG DEEP LAYER WINDS AND VERTICAL SHEAR WILL CONTINUE TO POSE A THREAT FOR DAMAGING WIND AS IT CONTINUES EWD THROUGH THE MODERATELY UNSTABLE ENVIRONMENT ACROSS NRN INDIANA AND SRN MICHIGAN. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29045.
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