Right now
The most recent data we hold from NOAA arrived 3 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 00:45 UTC. It is kept here as a record.
It is the 5th strongest of the 21 detections recorded within 20 km of this point since 27 April 2026. The last comparable one was on 11 June 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 11 at 7:07PM CDT until June 11 at 7:45PM CDT by NWS Milwaukee/Sullivan WI
Urban PEI: 866,916 within a heuristic 50 km radius; not unique people.
Nearby, since 27 April 2026
- June 12, 2026 · score 41 · 2.6 km
- June 11, 2026 · score 41 · 5.0 km
- June 12, 2026 · score 41 · 11.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 41 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 42.8532, -87.3726 |
| Nearest City | Racine (36 km) |
| Urban exposure index (PEI) | 866.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T00:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.8d693bb2c51c14960a41ae8985bd05c9 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-12T00:07:00.000Z.
First archived: 2026-06-12T00:09:18.773Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Wind Point WI to Winthrop Harbor IL; Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake; Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake; Winthrop Harbor to Wilmette Harbor IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 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 and 4 more areas |
| Headline | Special Marine Warning issued June 11 at 7:07PM CDT until June 11 at 7:45PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-06-11T19:45:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["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.d8b42ba17b4049035f2e1a7d59a7cb14c57b245b.001.1","noaa_urn:oid:2.49.0.1.840.0.d5d8c1be3191659d8c7eff32441a7b78f9ef7ff0.001.1","noaa_urn:oid:2.49.0.1.840.0.3644aff7ff47dc84004c67f0c8f03136ec8d0470.001.1","noaa_urn:oid:2.49.0.1.840.0.812794ee8ea5fde2174b8088222d3e45b8c2fdbc.001.1","noaa_urn:oid:2.49.0.1.840.0.d354e4b752751ff303d45970d160cedb38a6b3e3.001.1"] |
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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