This alert expired on 10 June 2026 at 22:00 UTC. It is kept here as a record.
It is the 12th strongest of the 20 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 15 April 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 10 at 3:06PM CDT until June 10 at 5:00PM CDT by NWS Chicago IL
An estimated 1,586,185 people live within 50 km of this point.
Nearby, since 15 April 2026
- July 27, 2026 · score 52 · 0.9 km
- June 28, 2026 · score 52 · 7.8 km
- September 5, 2026 · score 46 · 10.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 42.3929, -87.5564 |
| Nearest City | Zion (23 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-10T20:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.7e1900a6f89e43b837caf140f64956ec |
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; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN; 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; Port Washington to North Point Light WI; North Point Light to Wind Point WI; Wind Point WI to Winthrop Harbor IL; 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; Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued June 10 at 3:06PM CDT until June 10 at 5:00PM CDT by NWS Chicago IL |
| Expires | 2026-06-10T17:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7e1900a6f89e43b837caf140f64956ec4971a5b4.001.1","noaa_urn:oid:2.49.0.1.840.0.5327fff5e54dc18823f169ea308bb3c84704b53b.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.
Want to know when something happens near Zion?
Calamity.live data shows a weather event with CalamityScore 46/100, near Zion (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.