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| 099 FLUS43 KLOT 150929 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 429 AM CDT Fri May 15 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-160930- 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- 429 AM CDT Fri May 15 2026 /529 AM EDT Fri May 15 2026/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...Today and Tonight. Weather hazards expected... Limited Thunderstorm Risk...with an associated: Level 2 of 5 Damaging Wind Risk...up to 60 mph. Level 1 of 5 Large Hail Risk...up to quarter size. DISCUSSION... A line of strong to severe thunderstorms is expected to develop across portions of western Wisconsin and Iowa this evening, and move east across northern Illinois and northwest Indiana after midnight. While storms are expected to be in a gradually weakening mode, a few strong to severe storms with wind gusts to 60 mph and hail to quarter size are possible especially west of the Fox River Valley in northern Illinois. Gusty winds will remain possible farther to the east, but storms should gradually weaken with eastern extent overnight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Saturday night and early Sunday... Limited Thunderstorm Risk...with an associated: Level 1 of 5 Severe Thunderstorm Risk. Monday and Tuesday... Elevated Thunderstorm Risk...with an associated: Level 2 of 5 Severe Thunderstorm Risk. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. GENERAL STORM MOTION OF THE DAY: Moving toward the east-southeast at 35 to 40 mph. $$ LMZ740>745-160930- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 429 AM CDT Fri May 15 2026 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Today and Tonight. Weather hazards expected... Hazardous conditions for small craft. Limited Thunderstorm Risk late tonight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Saturday night... Limited Thunderstorm Risk...with an associated: Level 1 of 5 Severe Thunderstorm Risk. Sunday... Hazardous conditions for small craft are likely. Monday... Hazardous conditions for small craft are likely. Limited Thunderstorm Risk...with an associated: Level 2 of 5 Severe Thunderstorm Risk. Tuesday... Hazardous conditions for small craft are likely. Limited Thunderstorm Risk. $$ Ratzer Visit us at www.weather.gov/chicago |
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