Right now
The most recent data we hold from NOAA arrived 3 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 19 May 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 26 March 2026 — 15 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 6:09PM EDT until May 19 at 7:15PM EDT by NWS Cleveland OH
Urban PEI: 368,764 within a heuristic 50 km radius; not unique people.
Nearby, since 26 March 2026
- August 11, 2026 · score 43 · 3.9 km
- July 10, 2026 · score 43 · 4.8 km
- July 7, 2026 · score 43 · 5.0 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 41.6000, -83.0356 |
| Nearest City | Fremont (29 km) |
| Urban exposure index (PEI) | 368.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T22:09:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.32d1b454948693707a826515e84da5d485ff818b.002.1 |
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: 2026-05-19T22:09:00.000Z.
First archived: 2026-05-19T22:27:35.569Z. 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 | 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 |
| Headline | Special Marine Warning issued May 19 at 6:09PM EDT until May 19 at 7:15PM EDT by NWS Cleveland OH |
| Expires | 2026-05-19T19:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 40 |
| Iem Unit | mph |
| Iem City | Detroit River Light |
| Iem County | LEZ444 |
| Iem State | MI |
| Iem Wfo | DTX |
| MergedSources | [{"id":"iem_G_41.940_-83.430_1779223680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779223680000,"latitude":41.94,"longitude":-83.43},{"id":"iem_M_42.000_-83.140_1779225540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779225540000,"latitude":42,"longitude":-83.14}] |
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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