Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 1 July 2026 at 16:30 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 17 May 2026 — 18 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 1 at 10:35AM EDT until July 1 at 12:30PM EDT by NWS Grand Rapids MI
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.71/1 |
| Coordinates | 44.4184, -86.9890 |
| Nearest City | Manitowoc (65 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-01T14:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.b47bcd12ba2780f25850c8ec25bb2e4a |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-01T14:35:00.000Z.
First archived: 2026-07-01T15:09:22.907Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pentwater to Manistee MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake; Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI; Manistee to Point Betsie MI; Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake; Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake; Two Rivers to Sheboygan WI; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake and 1 more areas |
| Headline | Special Marine Warning issued July 1 at 10:35AM EDT until July 1 at 12:30PM EDT by NWS Grand Rapids MI |
| Expires | 2026-07-01T12:30:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b47bcd12ba2780f25850c8ec25bb2e4af80f1711.001.1","noaa_urn:oid:2.49.0.1.840.0.6db830b7cd87f8d90a500bd61c1408d0bb50cdf0.001.1","noaa_urn:oid:2.49.0.1.840.0.656195c9f8e0bd736b3a11ffa789dbf71fabf06f.001.1","noaa_urn:oid:2.49.0.1.840.0.d8e005fde89a366cd0bb920ed566138176fc893b.001.1","noaa_urn:oid:2.49.0.1.840.0.2a3e019ddbcbca427fe0e838589fdbd063c6b8b1.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 55 |
| Iem Unit | MPH |
| Iem City | 4 NW New Franken |
| Iem County | Brown |
| Iem State | WI |
| Iem Wfo | GRB |
| MergedSources | [{"id":"iem_G_44.840_-87.420_1782914280000","source":"iem","severity":"low","severityValue":25,"timestamp":1782914280000,"latitude":44.84,"longitude":-87.42},{"id":"iem_G_44.570_-87.900_1782912240000","source":"iem","severity":"low","severityValue":25,"timestamp":1782912240000,"latitude":44.57,"longitude":-87.9}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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