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SEL5 URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 255 NWS Storm Prediction Center Norman OK 515 PM CDT Thu May 15 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northern and Central Illinois Far Northwest Indiana Lake Michigan * Effective this Thursday afternoon and evening from 515 PM until 1000 PM CDT. * Primary threats include... A few tornadoes and a couple intense tornadoes possible Scattered large hail and isolated very large hail events to 3 inches in diameter likely Scattered damaging winds likely with isolated significant gusts to 75 mph possible SUMMARY...Supercell thunderstorms will pose a threat for large to very large hail this evening as they move east-northeastward. The largest hailstones may reach up to 2-3 inches in diameter. A few tornadoes are also possible, and a strong tornado may occur. Otherwise, scattered severe/damaging winds should also be a threat, especially if thunderstorms can congeal into clusters later this evening. The tornado watch area is approximately along and 70 statute miles east and west of a line from 60 miles north northeast of Marseilles IL to 35 miles west southwest of Champaign IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 251...WW 252...WW 253...WW 254... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 23035. ...Gleason