This alert expired on 8 June 2026 at 23:45 UTC. It is kept here as a record.
It is the 8th strongest of the 34 detections recorded within 20 km of this point since 18 May 2026. The last comparable one was on 6 June 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 8 at 5:49PM CDT until June 8 at 6:45PM CDT by NWS Chicago IL
An estimated 157,342 people live within 50 km of this point.
Nearby, since 18 May 2026
- May 18, 2026 · score 22 · 10.9 km
- August 10, 2026 · score 22 · 12.4 km
- July 27, 2026 · score 43 · 12.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 42.2500, -87.1643 |
| Nearest City | Evanston (49 km) |
| Population Exposed | 157.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-08T22:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.35e38e94a3c699dffe1f63d1da594f9ee715192e.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 |
| Headline | Special Marine Warning issued June 8 at 5:49PM CDT until June 8 at 6:45PM CDT by NWS Chicago IL |
| Expires | 2026-06-08T18:45:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.