Hazardous Weather Outlook
Issued by NWS Grand Rapids, MI
Issued by NWS Grand Rapids, MI
674 FLUS43 KGRR 161836 HWOGRR Hazardous Weather Outlook National Weather Service Grand Rapids MI 236 PM EDT Sat Aug 16 2025 MIZ037>040-043>046-050>052-056>059-064>067-071>074-171845- Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 236 PM EDT Sat Aug 16 2025 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...This Afternoon and Tonight Isolated to scattered thunderstorms are possible this afternoon and early evening. Stronger storms may produce 40-50 mph winds and small hail. Another line of thunderstorms is possible overnight from 10pm to 4am that may produce severe winds for portions of far southwest Michigan. Torrential rainfall is possible with any thunderstorm and may cause brief minor flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday Thunderstorms are expected each day between Sunday and Tuesday. While severe weather is not expected, locally heavy rain, lightning and wind gusts to around 40 mph will be possible with the stronger storms. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected but reports are appreciated. $$ LMZ844>849-171845- St Joseph to South Haven MI-South Haven to Holland MI- Holland to Grand Haven MI-Grand Haven to Whitehall MI- Whitehall to Pentwater MI-Pentwater to Manistee MI- 236 PM EDT Sat Aug 16 2025 This hazardous weather outlook is for the nearshore waters from St Joseph to Manistee. .DAY ONE...This Afternoon and Tonight Thunderstorms, some reaching strong to severe levels will be possible over Lake Michigan this afternoon and tonight. Winds in excess of 40 knots, torrential rain restricting visibility and lightning will all pose hazards to mariners. .DAYS TWO THROUGH SEVEN...Sunday through Friday Thunderstorms will be possible between Sunday and Tuesday over Lake Michigan. The biggest hazards to mariners will be lightning and locally gusty winds to 35 knots. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected but reports are appreciated. $$