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FLUS43 KGRR 180855
HWOGRR

Hazardous Weather Outlook
National Weather Service Grand Rapids MI
455 AM EDT Mon Aug 18 2025

MIZ037>040-043>046-050>052-056>059-064>067-071>074-190900-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
455 AM EDT Mon Aug 18 2025

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

Thunderstorms will increase in coverage tonight into Tuesday
morning. While severe weather is not expected, locally heavy rain
and lightning will be threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms will wind down Tuesday evening and Tuesday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

LMZ844>849-190900-
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-
455 AM EDT Mon Aug 18 2025

This hazardous weather outlook is for the nearshore waters from
St Joseph to Manistee.

.DAY ONE...Today and Tonight

Breezy off shore winds early this morning will pose a threat to
smaller craft. A similar setup may occur tonight.

Thunderstorms are expected over Lake Michigan from the afternoon
hours of today through Tuesday. Severe weather is not
anticipated.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A period of higher winds and waves out of the north is possible on
Tuesday.

Thunderstorms will wind down on Tuesday,

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$