Hazardous Weather Outlook
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
718 FLUS43 KLOT 260825 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 325 AM CDT Sat Jul 26 2025 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-270830- Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford- Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton- 325 AM CDT Sat Jul 26 2025 /425 AM EDT Sat Jul 26 2025/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...Today and Tonight. Weather hazards expected... Significant Thunderstorm Risk...with an associated: Level 1 of 5 Damaging Wind Risk...up to 60 mph Elevated Flooding Risk. DISCUSSION... Periods of heavy rain producing showers and storms are expected overnight which may lead to torrential rainfall and flash flooding, especially mid morning into the afternoon. There is also a threat for a few strong to severe storms in the afternoon, mainly south of I-88. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Sunday... Limited Thunderstorm Risk... Elevated Excessive Heat Risk. Monday... Significant Excessive Heat Risk. Tuesday... Limited Flooding Risk. Limited Thunderstorm Risk. Elevated Excessive Heat Risk. Wednesday... Limited Thunderstorm Risk. DISCUSSION... Heat and humidity may once again build to dangerous levels at times Sunday through Tuesday with the hottest conditions expected on Monday. .SPOTTER INFORMATION STATEMENT... Spotters may be needed later this morning into the afternoon. GENERAL STORM MOTION OF THE DAY: Moving toward the northeast at 30 mph. $$ LMZ740>745-270830- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 325 AM CDT Sat Jul 26 2025 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Today and Tonight. Weather hazards expected... Elevated Thunderstorm Risk...with an associated: Level 1 of 5 Thunderstorm Wind Gust Risk...up to 40 knots. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Sunday... Limited Thunderstorm Risk. Tuesday and Wednesday... Limited Thunderstorm Risk. $$ KMD Visit us at www.weather.gov/chicago