Tue Jun 18 03:49:18 EDT 2024 Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 349 AM EDT Tue Jun 18 2024 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Heat indices will increase up to around 100 degrees this afternoon. This will create the potential for heat related illnesses. Isolated thunderstorms are possible this afternoon and evening for areas away from Lake Michigan. Severe weather is unlikely. Locally heavy downpours with slow moving storms will be the main threat, along with lightning. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Prolonged impacts of heat and humidity this week will increase potential for heat related illnesses through Saturday. Isolated thunderstorms will be possible mainly during the afternoon and evening hours for areas away from Lake Michigan through Saturday. Severe weather is not expected. Locally heavy downpours with slow moving storms will be the main threat, along with lightning. A better chance for more widespread thunderstorms could come Saturday night or Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.