This alert expired on 2 July 2026 at 07:15 UTC. It is kept here as a record.
It is the 16th strongest of the 28 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 1 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 2 at 1:13AM CDT until July 2 at 2:15AM CDT by NWS Milwaukee/Sullivan WI
An estimated 48,797 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 9, 2026 · score 34 · 5.8 km
- September 4, 2026 · score 37 · 20.8 km
- July 1, 2026 · score 43 · 21.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 86 % 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 | 86% |
| Coordinates | 43.6363, -87.5500 |
| Nearest City | Sheboygan (18 km) |
| Population Exposed | 48.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T06:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b9b98e1bca36a71ee9868ac3fb932f090c40a088.001.1 |
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 July 2 at 1:13AM CDT until July 2 at 2:15AM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-07-02T02:15:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 40 |
| Iem Unit | MPH |
| Iem City | 2 NNW Manitowoc |
| Iem County | Manitowoc |
| Iem State | WI |
| Iem Wfo | GRB |
| Iem Remark | AWOS station KMTW Manitowoc Airport. |
| MergedSources | [{"id":"iem_M_44.120_-87.670_1782972060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782972060000,"latitude":44.12,"longitude":-87.67}] |
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 Sheboygan?
Calamity.live data shows a weather event with CalamityScore 34/100, near Sheboygan (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.