This alert expired on 8 July 2026 at 23:30 UTC. It is kept here as a record.
It is the 7th strongest of the 20 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 2 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 8 at 4:36PM CDT until July 8 at 6:30PM CDT by NWS Green Bay WI
An estimated 48,327 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 1, 2026 · score 43 · 13.0 km
- July 8, 2026 · score 43 · 18.5 km
- September 2, 2026 · score 37 · 21.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 80 % 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) | 34 / 100 |
| Our confidence | 80% |
| Coordinates | 44.3718, -87.3755 |
| Nearest City | Manitowoc (39 km) |
| Population Exposed | 48.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-08T21:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6ba5c307c76baa4c7fe3ac15ecb5cc6ca4fc7ef5.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Sturgeon Bay to Two Rivers WI; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued July 8 at 4:36PM CDT until July 8 at 6:30PM CDT by NWS Green Bay WI |
| Expires | 2026-07-08T18:30:00-05:00 |
| SenderName | NWS Green Bay 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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.