Right now
The most recent data we hold from NOAA arrived 23 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 22:45 UTC. It is kept here as a record.
It is the 13th strongest of the 16 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 4:47PM CDT until June 10 at 5:45PM CDT by NWS Green Bay WI
Nearby, since 10 June 2026
- July 8, 2026 · score 22 · 7.3 km
- June 10, 2026 · score 28 · 19.9 km
- July 9, 2026 · score 22 · 25.6 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 | 43.6741, -87.0428 |
| Nearest City | Sheboygan (54 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-10T21:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.aca062b9a2456c514e8f0561d534fb22 |
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: 2026-06-10T21:47:00.000Z.
First archived: 2026-06-10T21:48:38.784Z. 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 | Sturgeon Bay to Two Rivers WI; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake; Rock Island Passage to Sturgeon Bay WI; Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake; Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake; Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake; Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake and 8 more areas |
| Headline | Special Marine Warning issued June 10 at 4:47PM CDT until June 10 at 5:45PM CDT by NWS Green Bay WI |
| Expires | 2026-06-10T17:45:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.aca062b9a2456c514e8f0561d534fb2263a0990f.002.1","noaa_urn:oid:2.49.0.1.840.0.9bc1b9caa997ea3307ed65f80c27bbf65b1a02f3.001.1","noaa_urn:oid:2.49.0.1.840.0.f8d56c254e057e982d2b40ba4b541ad92f56dcbb.001.1","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.ba53d52f3341594a9ab744f4e9fc414b0cae6cad.001.1","noaa_urn:oid:2.49.0.1.840.0.6492b1e0708e1f3a7d54b740d67d9f16a32a4114.001.1","noaa_urn:oid:2.49.0.1.840.0.ea99439853224ce087ee17ca097d2c2635a2d352.001.1"] |
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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