This alert expired on 28 June 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 10 June 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 28 at 4:59PM CDT until June 28 at 6:30PM CDT by NWS Chicago IL
An estimated 2,110,464 people live within 50 km of this point.
Nearby, since 10 June 2026
- July 27, 2026 · score 52 · 7.0 km
- July 3, 2026 · score 46 · 7.7 km
- June 10, 2026 · score 46 · 7.8 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % 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) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 42.3324, -87.5072 |
| Nearest City | North Chicago (27 km) |
| Population Exposed | 2.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-28T21:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.4c9f37cf3eb6bd9eff08e27981326caf |
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; 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; North Point Light to Wind Point WI; Wind Point WI to Winthrop Harbor IL; Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued June 28 at 4:59PM CDT until June 28 at 6:30PM CDT by NWS Chicago IL |
| Expires | 2026-06-28T18:30:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4c9f37cf3eb6bd9eff08e27981326caf422afe66.001.1","noaa_urn:oid:2.49.0.1.840.0.43ad5ae6b6b58cb571b170440f94b621e9e25969.001.1"] |
| Iem TypeSummary | O |
| Iem City | 2 SW Northbrook |
| Iem County | Cook |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Public report of a downed tree with an estimated wind gust near 60 mph. |
| Google News RssFeed | weather |
| Google News SourceName | ABC7 Chicago |
| MergedSources | [{"id":"iem_N_42.120_-87.910_1782683880000","source":"iem","severity":"low","severityValue":25,"timestamp":1782683880000,"latitude":42.12,"longitude":-87.91},{"id":"iem_N_41.970_-87.630_1782685500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782685500000,"latitude":41.97,"longitude":-87.63},{"id":"iem_O_42.110_-87.840_1782683940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782683940000,"latitude":42.11,"longitude":-87.84},{"id":"gnews_weather_495187_122","source":"google_news","severity":"medium","severityValue":40,"timestamp":1782675983000,"latitude":41.85,"longitude":-87.65}] |
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 North Chicago?
Calamity.live data shows a weather event with CalamityScore 52/100, near North Chicago (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.