Right now
The most recent data we hold from NOAA arrived 11 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 6 June 2026 at 02:45 UTC. It is kept here as a record.
It is the 6th strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 17 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 5 at 9:36PM CDT until June 5 at 9:45PM CDT by NWS Green Bay WI
An estimated 33,010 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 8, 2026 · score 34 · 12.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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) | 28 / 100 |
| Our confidence | 80% |
| Coordinates | 44.2863, -87.2706 |
| Nearest City | Manitowoc (38 km) |
| Population Exposed | 33.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T02:36:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.ab058194f457d5d83f810aead138492b |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Rock Island Passage to Sturgeon Bay WI; Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Sheboygan to Port Washington WI; Lake Michigan from Sheboygan to Port Washington WI 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 June 5 at 9:36PM CDT until June 5 at 9:45PM CDT by NWS Green Bay WI |
| Expires | 2026-06-05T21:45:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ab058194f457d5d83f810aead138492b7b9d8e59.002.1","noaa_urn:oid:2.49.0.1.840.0.d15f1c33495158bdaa002bd31b73fb2e68e76910.001.1","noaa_urn:oid:2.49.0.1.840.0.927eb79c6177731fd0d1c92bda1352dc61e2031f.001.1"] |
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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