This alert expired on 9 August 2026 at 20:15 UTC. It is kept here as a record.
It is the 4th strongest of the 37 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 9 at 2:09PM EDT until August 9 at 4:15PM EDT by NWS Northern Indiana
Nearby, since 10 March 2026
- July 27, 2026 · score 22 · 6.4 km
- July 27, 2026 · score 43 · 12.5 km
- June 8, 2026 · score 43 · 13.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 42.3610, -87.1099 |
| Nearest City | Evanston (60 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-09T18:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.95f78c00e3a4d97aa9dc0d845c8f6746 |
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.; Winthrop Harbor to Wilmette Harbor IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid 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 and 2 more areas |
| Headline | Special Marine Warning issued August 9 at 2:09PM EDT until August 9 at 4:15PM EDT by NWS Northern Indiana |
| Expires | 2026-08-09T16:15:00-04:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.95f78c00e3a4d97aa9dc0d845c8f67463cafaef2.001.1","noaa_urn:oid:2.49.0.1.840.0.5f6c58bffe59b0e0c296f87892b99670398b88b4.001.1","noaa_urn:oid:2.49.0.1.840.0.fc75b397116f24682159b5256239a5482df5d36e.001.1","noaa_urn:oid:2.49.0.1.840.0.38c912b60be0a518f53d2fba4938839a101bcef9.001.1","noaa_urn:oid:2.49.0.1.840.0.d4ab2c35929b01b6a0afbbc3c6472c8c3e59e4f1.001.1"] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.