Right now
The most recent data we hold from NOAA arrived 1 minute 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 3 July 2026 at 23:45 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 18 May 2026 — 10 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 3 at 6:26PM EDT until July 3 at 7:45PM EDT by NWS Detroit/Pontiac MI
Urban PEI: 1,442,520 within a heuristic 50 km radius; not unique people.
Nearby, since 18 May 2026
- July 3, 2026 · score 52 · 10.5 km
- June 12, 2026 · score 52 · 12.9 km
- June 12, 2026 · score 52 · 14.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.82/1 |
| Coordinates | 42.0105, -82.8979 |
| Nearest City | Kingsville (17 km) |
| Urban exposure index (PEI) | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T22:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.c5ee406e342ea1ac4ea26963605064d5 |
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: 2026-07-03T22:26:00.000Z.
First archived: 2026-07-03T22:36:55.516Z. 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 | St. Clair River; Detroit River; Lake St. Clair Open Lake (U.S. Portion); Michigan Waters of Lake Erie from Detroit River to North Cape MI; Maumee Bay to Reno Beach OH; Reno Beach to The Islands OH; The Islands to Vermilion OH; Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border; The Islands to Vermilion OH beyond 5 nm off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued July 3 at 6:26PM EDT until July 3 at 7:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-07-03T19:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c5ee406e342ea1ac4ea26963605064d5ff9a9027.001.1","noaa_urn:oid:2.49.0.1.840.0.308548f3981a02dc026ffbd3caaf9637fd427f69.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 48 |
| Iem Unit | mph |
| Iem City | Monroe Custer Airport |
| Iem County | Monroe |
| Iem State | MI |
| Iem Wfo | DTX |
| MergedSources | [{"id":"iem_G_41.940_-83.430_1783115580000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115580000,"latitude":41.94,"longitude":-83.43}] |
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.
Review the area, threshold and delivery channel in your account.
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