SPC Severe Thunderstorm Watch 408
WW 408 SEVERE TSTM IL IN MI OH LM 131850Z – 140100Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 408 NWS Storm Prediction Center Norman OK 150 PM CDT Thu Jun 13 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Northern Indiana Southern and Central Lower Michigan Far Northwest Ohio Lake Michigan * Effective this Thursday afternoon and evening from 150 PM until 800 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible Scattered damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Thunderstorms are expected to continue increasing in coverage this afternoon while posing a threat for large hail around 1.5-2.5 inches in diameter. Severe/damaging winds of 60-70 mph may also occur as convection moves east-southeastward and potentially grows into one or more small clusters through the afternoon and early evening. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 20 miles west southwest of Marseilles IL to 10 miles north of Jackson MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Gleason
