Special Marine Warning Issued for Lake Michigan Waters from St. Joseph to Pentwater
This alert is no longer in effect.
NOAA issued it on August 9, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Grand Rapids has issued a Special Marine Warning for nearshore and open waters from St. Joseph to Pentwater MI until 4:15 PM EDT.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Michigan near Western Michigan
- Issued
- August 9, 2026
- Issuing authority
- NWS Grand Rapids MI
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Lake Michigan near Western Michigan.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Grand Rapids MI. The alert is effective from August 9 at 1:08 PM EDT until August 9 at 4:15 PM EDT.
Affected Areas
Nearshore and open waters from St Joseph to Pentwater MI, including zones LMZ844, LMZ845, LMZ846, LMZ847, LMZ848, LMZ870, LMZ872, LMZ874, LMZ876, and LMZ878. Impacted locations include Saugatuck Pier Heads, South Haven Light, St. Joseph Light, White Lake Pier Heads, Mona Lake Channel, The White Lake Pierheads, Little Sable Point Light, Grand Haven Light, Muskegon Light, and St. Joseph.
What You Should Do
Move to safe harbor until hazardous weather passes.
Expected Conditions
At 1:07 PM EDT, strong thunderstorms were located along a line extending from 9 nm northwest of Sheboygan to 17 nm east of North Pt. Lt. to 10 nm southeast of McHenry, moving east at 25 knots. Hazards include wind gusts to nearly 50 knots and small hail.
Timeline
The warning is in effect from 1:08 PM EDT to 4:15 PM EDT on August 9, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,043 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 9, 2026.
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