Hazardous Weather Outlook
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
796 FLUS43 KLOT 151708 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 1208 PM CDT Mon Jul 15 2024 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-161715- 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- 1208 PM CDT Mon Jul 15 2024 /108 PM EDT Mon Jul 15 2024/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...This Afternoon and Tonight. Weather hazards expected... Significant Thunderstorm Risk...with an associated: Level 2 of 5 Tornado Risk. Level 3 of 5 Damaging Wind Risk...up to 75 mph. Level 1 of 5 Hail Risk...up to quarter size. Level 2 of 5 Flash Flooding Risk. Significant Excessive Heat Risk. DISCUSSION... Peak heat index readings in the 105 to 110 degree range are likely this afternoon, especially over the more rural agricultural regions of northern Illinois. Another round of strong to severe thunderstorms is expected to move across the area from late this afternoon through this evening. Damaging winds are expected to be the primary severe hazard, though isolated large hail and a few tornadoes will also be possible. Torrential downpours may produce flash flooding. If notable heavy rain occurs over the most hard hit areas from both Saturday night and Sunday night along with the most heavily urbanized portions of the Chicago metro, significant flash flooding may develop. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday... Limited Flooding Risk. Elevated Thunderstorm Risk...with an associated: Level 1 of 5 Severe Thunderstorm Risk south of I-80. Wednesday... Limited Thunderstorm Risk east of I-57 and south of the Kankakee River. DISCUSSION... Scattered thunderstorms are possible again on Tuesday afternoon, primarily near and south of I-80, especially east of I-55, which may be accompanied by an isolated severe weather and flash flooding threat. .SPOTTER INFORMATION STATEMENT... Spotters will likely be needed late this afternoon and evening. GENERAL STORM MOTION OF THE DAY: Moving toward the east-southeast at 40 to 45 mph. $$ LMZ740>745-161715- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1208 PM CDT Mon Jul 15 2024 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...This Afternoon and Tonight. Weather hazards expected... Significant Thunderstorm Risk...with an associated: Level 1 of 5 Thunderstorm Waterspout Risk Level 3 of 5 Thunderstorm Wind Gust Risk...up to 60 knots. Level 1 of 5 Hail Risk...up to quarter size. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday... Limited Thunderstorm Risk mainly southeast of Chicago. $$ Carothers Visit us at www.weather.gov/chicago Follow us on Facebook, Twitter, and Youtube at: www.facebook.com/nwschicago www.twitter.com/nwschicago www.youtube.com/nwschicago