This alert expired on 3 September 2026 at 14:30 UTC. It is kept here as a record.
It is the 13th strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 9 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 3 at 8:25AM CDT until September 3 at 9:30AM CDT by NWS Milwaukee/Sullivan WI
An estimated 1,202,682 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 3, 2026 · score 52 · 1.1 km
- August 9, 2026 · score 52 · 10.3 km
- June 16, 2026 · score 52 · 11.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 81% |
| Coordinates | 43.0920, -87.6490 |
| Nearest City | Milwaukee (22 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T13:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d054e510622784e95733049b3f9c8e995f976a72.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Port Washington to North Point Light WI; North Point Light to Wind Point WI; Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake; Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued September 3 at 8:25AM CDT until September 3 at 9:30AM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-09-03T09:30:00-05:00 |
| 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.
Want to know when something happens near Milwaukee?
Calamity.live data shows a weather event with CalamityScore 46/100, near Milwaukee (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.