climate
Archived signal
Special Marine Warning issued September 4 at 4:39AM EDT until September 4 at 6:45AM EDT by NWS Grand Rapids MI
SMWGRR The National Weather Service in Grand Rapids has issued a * Special Marine Warning for... Nearshore Waters from Holland to Pentwater MI... Open Waters from South Haven to Manistee MI... * Until 645 AM EDT. * At 439 AM EDT, strong thunderstorms were located along a line extending from 13 nm east of Sheboygan to 3…
Reported by NWS Alerts
Sep 4, 2026 · 08:39 UTC
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Verification notice
IntelMap indexes open-source reporting. This page identifies what a source reported; it does not independently confirm the claim.
INCIDENT EVOLUTION 7 recorded states
Sep 4 · 08:40 UTC Signal first indexed P3 · 99% quality · 1 source
Sep 4 · 08:41 UTC Headline updated P3 · 99% quality · 1 source
Sep 4 · 08:45 UTC Headline updated P3 · 99% quality · 1 source
Sep 4 · 09:00 UTC Headline updated P3 · 99% quality · 1 source
Sep 4 · 09:01 UTC Headline updated P3 · 99% quality · 1 source
Sep 4 · 09:15 UTC Headline updated P3 · 99% quality · 1 source
Sep 4 · 09:25 UTC Priority 3→5 · quality 99→95 · headline updated P5 · 95% quality · 1 source
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Signal dossier #BFB8C031A4DE
Classification Climate
Location Holland to Grand Haven MI; Grand Haven to Whitehall MI; Whitehall to Pentwater MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake; Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake; Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake; Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake
Priority 5 / 5
Signal quality 95% heuristic
Reader activity 0 views
Corroboration 1 source
Status Archived
View on global map 43.29°, -86.68°
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