Right now
The most recent data we hold from NOAA arrived 11 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 4 July 2026 at 03:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 92 detections recorded within 20 km of this point since 3 April 2026. The last comparable one was on 3 July 2026. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 3 at 10:41PM EDT until July 3 at 11:45PM EDT by NWS Northern Indiana
An estimated 3,743,592 people live within 50 km of this point.
Nearby, since 3 April 2026
- August 12, 2026 · score 52 · 0.6 km
- August 9, 2026 · score 52 · 3.4 km
- June 6, 2026 · score 52 · 3.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 41.8407, -87.0661 |
| Nearest City | Michigan City (20 km) |
| Population Exposed | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T02:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.9cc9edcfca51ca4d2ab09590f798049e |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | New Buffalo MI to St Joseph MI; Michigan City IN to New Buffalo MI; Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake.; 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 Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued July 3 at 10:41PM EDT until July 3 at 11:45PM EDT by NWS Northern Indiana |
| Expires | 2026-07-03T23:45:00-04:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9cc9edcfca51ca4d2ab09590f798049e3bd5d146.001.1","noaa_urn:oid:2.49.0.1.840.0.ae0b9466724a3ec88c161732b0b4ffe000eae7e9.001.1"] |
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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