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 14 June 2026 at 05:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 84 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 13 at 11:47PM CDT until June 14 at 12:15AM CDT by NWS Chicago IL
An estimated 5,114,473 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 27, 2026 · score 52 · 3.6 km
- June 6, 2026 · score 52 · 5.7 km
- August 12, 2026 · score 52 · 8.1 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 81 % 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 | 81% |
| Coordinates | 41.8115, -87.1559 |
| Nearest City | Michigan City (24 km) |
| Population Exposed | 5.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-14T04:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.747d85da49ec1ae7c4bf266b007b318b |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary 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; 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; 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. |
| Headline | Special Marine Warning issued June 13 at 11:47PM CDT until June 14 at 12:15AM CDT by NWS Chicago IL |
| Expires | 2026-06-14T00:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.747d85da49ec1ae7c4bf266b007b318b2630291b.002.1","noaa_urn:oid:2.49.0.1.840.0.74781a866c966a437e69bd6766c122f67a267476.001.1","noaa_urn:oid:2.49.0.1.840.0.7c53b5d2cc32c31a42dd3d2aa7f4e3d650828213.001.1"] |
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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