Right now
The most recent data we hold from NOAA arrived 4 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 13 May 2026 at 00:45 UTC. It is kept here as a record.
It is the 4th strongest of the 47 detections recorded within 20 km of this point since 13 March 2026. The last comparable one was on 27 April 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 12 at 7:21PM CDT until May 12 at 7:45PM CDT by NWS Milwaukee/Sullivan WI
An estimated 723,267 people live within 50 km of this point.
Nearby, since 13 March 2026
- May 13, 2026 · score 48 · 3.6 km
- September 4, 2026 · score 41 · 12.6 km
- June 18, 2026 · score 48 · 12.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 82 % 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) | 48 / 100 |
| Our confidence | 82% |
| Coordinates | 43.4556, -87.7378 |
| Nearest City | Sheboygan (33 km) |
| Population Exposed | 723.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T00:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8201ebaf685339b182d7bf858765861a1d59909a.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Sheboygan to Port Washington WI; Port Washington to North Point Light WI; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake; Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued May 12 at 7:21PM CDT until May 12 at 7:45PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-05-12T19:45:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
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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