This alert expired on 3 July 2026 at 18:45 UTC. It is kept here as a record.
It is the 16th strongest of the 21 detections recorded within 20 km of this point since 10 June 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 3 at 1:04PM CDT until July 3 at 1:45PM CDT by NWS Milwaukee/Sullivan WI
An estimated 5,391,734 people live within 50 km of this point.
Nearby, since 10 June 2026
- August 11, 2026 · score 52 · 2.4 km
- August 10, 2026 · score 52 · 4.0 km
- June 11, 2026 · score 46 · 4.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 84 % 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 | 84% |
| Coordinates | 42.2636, -87.5153 |
| Nearest City | Highland Park (25 km) |
| Population Exposed | 5.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T18:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.06d3566ee35be759a693cb4191331abe |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | North Point Light to Wind Point WI; 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; 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 |
| Headline | Special Marine Warning issued July 3 at 1:04PM CDT until July 3 at 1:45PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-07-03T13:45:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.06d3566ee35be759a693cb4191331abe4960b4ef.001.1","noaa_urn:oid:2.49.0.1.840.0.7bf783b27747c6d06ac80784f48c0522c3740f2e.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 3 N Pleasant Prairie |
| Iem County | Kenosha |
| Iem State | WI |
| Iem Wfo | MKX |
| Iem Remark | ASOS measure 50 kts. |
| MergedSources | [{"id":"iem_G_42.590_-87.940_1783101180000","source":"iem","severity":"low","severityValue":25,"timestamp":1783101180000,"latitude":42.59,"longitude":-87.94}] |
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 Highland Park?
Calamity.live data shows a weather event with CalamityScore 46/100, near Highland Park (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.