Right now
The most recent data we hold from NOAA arrived 6 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 10 June 2026 at 22:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 6 detections recorded within 20 km of this point since 10 June 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 10 at 4:41PM CDT until June 10 at 5:00PM CDT by NWS Chicago IL
Nearby, since 10 June 2026
- June 10, 2026 · score 28 · 1.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 16 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 43.5219, -87.1675 |
| Nearest City | Sheboygan (50 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-10T21:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.9e86f27edad42f07af0d56811df06b67 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-10T21:41:00.000Z.
First archived: 2026-06-10T21:43:21.991Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; St Joseph to South Haven MI; South Haven to Holland MI; Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake; Holland to Grand Haven MI; Grand Haven to Whitehall MI; Whitehall to Pentwater MI; Pentwater to Manistee MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake; Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake; Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake and 8 more areas |
| Headline | Special Marine Warning issued June 10 at 4:41PM CDT until June 10 at 5:00PM CDT by NWS Chicago IL |
| Expires | 2026-06-10T17:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9e86f27edad42f07af0d56811df06b67d127404e.002.1","noaa_urn:oid:2.49.0.1.840.0.9b883b892de9343be280cfe22dbb7b67206720c7.001.1","noaa_urn:oid:2.49.0.1.840.0.780439d3b8a53a59cc56aca86302ff89e1133af4.001.1","noaa_urn:oid:2.49.0.1.840.0.8a0db34808f64c0b41a15106a42cf8e328005b75.001.1","noaa_urn:oid:2.49.0.1.840.0.92a1583bc2209275d1be0b0a9f403bdd2290146c.001.1","noaa_urn:oid:2.49.0.1.840.0.d3c2b7cd40571ced49bbbe970d4d27cf6c7658d9.001.1","noaa_urn:oid:2.49.0.1.840.0.ba53d52f3341594a9ab744f4e9fc414b0cae6cad.001.1","noaa_urn:oid:2.49.0.1.840.0.6492b1e0708e1f3a7d54b740d67d9f16a32a4114.001.1","noaa_urn:oid:2.49.0.1.840.0.7426a4bcea40eb000358ad67bfb9d7f45f922c2d.001.1","noaa_urn:oid:2.49.0.1.840.0.36af92dc1e71746d0bde9f441f162e3806f71c32.001.1","noaa_urn:oid:2.49.0.1.840.0.5327fff5e54dc18823f169ea308bb3c84704b53b.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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