Right now
The most recent data we hold from NOAA arrived 2 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 5 August 2026 at 23:15 UTC. It is kept here as a record.
It is the 27th strongest of the 88 detections recorded within 20 km of this point since 3 April 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 August 5 at 5:33PM CDT until August 5 at 6:15PM CDT by NWS Chicago IL
An estimated 871,457 people live within 50 km of this point.
Nearby, since 3 April 2026
- June 18, 2026 · score 43 · 5.9 km
- August 9, 2026 · score 52 · 6.3 km
- June 12, 2026 · score 72 · 6.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 79 % 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) | 48 / 100 |
| Our confidence | 79% |
| Coordinates | 41.7567, -87.0392 |
| Nearest City | Michigan City (13 km) |
| Population Exposed | 871.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-05T22:33:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.09adc24d080ec0967c703c336e891cad8eb32ff7.002.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 August 5 at 5:33PM CDT until August 5 at 6:15PM CDT by NWS Chicago IL |
| Expires | 2026-08-05T18:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
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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