Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for Watch Status Reports.
SEL1 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 601 NWS Storm Prediction Center Norman OK 550 PM CDT Mon Aug 5 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Northwest Indiana Southern Wisconsin * Effective this Monday afternoon from 550 PM until Midnight CDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Isolated to scattered strong to severe thunderstorms are forecast this evening. A few of the stronger storms may evolve into supercells posing a risk for large hail (1 to 1.5 inches in diameter), severe gusts, and perhaps a tornado. Strong to severe multicells are forecast near the Indiana and Illinois border this evening. A localized risk for hail and wind may accompany these storms. By later this evening, other storms may develop and move into western parts of the Watch and yield a threat for locally damaging gusts and perhaps large hail. The severe thunderstorm watch area is approximately along and 45 statute miles north and south of a line from 70 miles west northwest of Rockford IL to 85 miles east southeast of Marseilles IL. 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 597...WW 598...WW 599...WW 600... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27020. ...Smith