Right now
The most recent data we hold from NOAA arrived 12 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.
It is the 4th strongest of the 79 detections recorded within 20 km of this point since 31 March 2026. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 7:05PM EDT until May 19 at 7:15PM EDT by NWS Cleveland OH
An estimated 253,665 people live within 50 km of this point.
Nearby, since 31 March 2026
- May 18, 2026 · score 43 · 3.1 km
- July 21, 2026 · score 43 · 7.0 km
- June 6, 2026 · score 43 · 13.5 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % 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) | 43 / 100 |
| Our confidence | 85% |
| Coordinates | 41.5624, -82.5386 |
| Nearest City | Sandusky (19 km) |
| Population Exposed | 253.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T23:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.fd235754dede76d774f2ad53d145ffc3 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Reno Beach to The Islands OH; The Islands to Vermilion OH; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border; The Islands to Vermilion OH; Vermilion to Avon Point OH; Avon Point to Willowick OH; The Islands to Vermilion OH beyond 5 nm off shoreline to US-Canadian border; Vermilion to Avon Point OH beyond 5 nm off shoreline to US-Canadian border; Avon Point to Willowick OH beyond 5 nm off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued May 19 at 7:05PM 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 |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fd235754dede76d774f2ad53d145ffc3617d0982.001.1","noaa_urn:oid:2.49.0.1.840.0.0b25698b32a2e38213bf2ec32e250abd645b59c9.001.1"] |
| 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_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.
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