Right now
The most recent data we hold from NOAA arrived 2 hours 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 12 June 2026 at 00:30 UTC. It is kept here as a record.
It is the 12th strongest of the 25 detections recorded within 20 km of this point since 27 April 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 11 at 7:15PM CDT until June 11 at 7:30PM CDT by NWS Green Bay WI
An estimated 178,843 people live within 50 km of this point.
Nearby, since 27 April 2026
- June 11, 2026 · score 41 · 5.8 km
- June 12, 2026 · score 41 · 5.9 km
- June 12, 2026 · score 41 · 10.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Our confidence | 80% |
| Coordinates | 42.8594, -87.2977 |
| Nearest City | Racine (42 km) |
| Population Exposed | 178.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T00:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.5df37072ee4b15c92e8af3a8e09d6ab5 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake; South Haven to Holland MI; Holland to Grand Haven MI; Grand Haven to Whitehall MI; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake; Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake; Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake; 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 and 4 more areas |
| Headline | Special Marine Warning issued June 11 at 7:15PM CDT until June 11 at 7:30PM CDT by NWS Green Bay WI |
| Expires | 2026-06-11T19:30:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5df37072ee4b15c92e8af3a8e09d6ab526907679.002.1","noaa_urn:oid:2.49.0.1.840.0.9d733c471c2269519e0d56b43f1dc827054371dd.001.1","noaa_urn:oid:2.49.0.1.840.0.ec9f0bfeb205d1c7ed90bf61dd9b7ecc24e5481c.001.1","noaa_urn:oid:2.49.0.1.840.0.8d693bb2c51c14960a41ae8985bd05c91b0ecc8c.001.1","noaa_urn:oid:2.49.0.1.840.0.a25fda3d7ddc60c85b0c72cf9175e3920490e42c.001.1","noaa_urn:oid:2.49.0.1.840.0.3644aff7ff47dc84004c67f0c8f03136ec8d0470.001.1","noaa_urn:oid:2.49.0.1.840.0.812794ee8ea5fde2174b8088222d3e45b8c2fdbc.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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