Right now
The most recent data we hold from NOAA arrived 5 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 07:30 UTC. It is kept here as a record.
It is the 36th strongest of the 59 detections recorded within 20 km of this point since 18 May 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 6 at 2:01AM CDT until June 6 at 2:30AM CDT by NWS Chicago IL
An estimated 31,459 people live within 50 km of this point.
Nearby, since 18 May 2026
- June 8, 2026 · score 34 · 10.8 km
- August 10, 2026 · score 22 · 14.6 km
- June 12, 2026 · score 46 · 15.4 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 81 % 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 | 81% |
| Coordinates | 42.0271, -87.0407 |
| Nearest City | Michigan City (37 km) |
| Population Exposed | 31.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T07:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.e78672b7d5ac224f6f95bf11953a14d9 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake; New Buffalo MI to St Joseph MI; Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake. |
| Headline | Special Marine Warning issued June 6 at 2:01AM CDT until June 6 at 2:30AM CDT by NWS Chicago IL |
| Expires | 2026-06-06T02:30:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e78672b7d5ac224f6f95bf11953a14d923fc2cbf.001.1","noaa_urn:oid:2.49.0.1.840.0.2bfe11b443d3434dff644a30cd099cc9bac95c72.001.1"] |
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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