Right now
The most recent data we hold from NOAA arrived 22 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 17 May 2026 at 22:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 23 detections recorded within 20 km of this point since 17 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 17 at 5:20PM EDT until May 17 at 6:45PM EDT by NWS Gaylord MI
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 69% |
| Coordinates | 44.3164, -87.0250 |
| Nearest City | Manitowoc (57 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-17T21:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.63c6e916d983f91a9ced3324a8fde5ce |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Manistee to Point Betsie MI; Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake; Sturgeon Bay to Two Rivers WI; Two Rivers to Sheboygan WI; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued May 17 at 5:20PM EDT until May 17 at 6:45PM EDT by NWS Gaylord MI |
| Expires | 2026-05-17T18:45:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.63c6e916d983f91a9ced3324a8fde5ce26eb6761.001.1","noaa_urn:oid:2.49.0.1.840.0.eb4678391e48b0384ec4677587c8ed9f24bc7355.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 SW Shoto |
| Iem County | Manitowoc |
| Iem State | WI |
| Iem Wfo | GRB |
| Iem Remark | 3 to 4 trees downed along County Road B. |
| MergedSources | [{"id":"iem_D_44.150_-87.560_1779051360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779051360000,"latitude":44.15,"longitude":-87.56},{"id":"iem_D_44.150_-87.660_1779051000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779051000000,"latitude":44.15,"longitude":-87.66}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.