Right now
The most recent data we hold from NOAA arrived 21 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 20 May 2026 at 00:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 87 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 10 May 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 6:30PM EDT until May 19 at 8:30PM EDT by NWS Cleveland OH
An estimated 1,252,057 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 52 · 3.7 km
- June 11, 2026 · score 46 · 4.0 km
- June 10, 2026 · score 46 · 6.1 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % 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) | 52 / 100 |
| Our confidence | 91% |
| Coordinates | 41.5685, -82.1500 |
| Nearest City | Avon Lake (12 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T22:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0b25698b32a2e38213bf2ec32e250abd645b59c9.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 6:30PM EDT until May 19 at 8:30PM EDT by NWS Cleveland OH |
| Expires | 2026-05-19T20:30:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 3 W Marblehead |
| Iem County | Ottawa |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Tree fell on 2 trailers. |
| MergedSources | [{"id":"iem_M_41.400_-82.550_1779231600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779231600000,"latitude":41.4,"longitude":-82.55},{"id":"iem_M_41.600_-82.780_1779230400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779230400000,"latitude":41.6,"longitude":-82.78},{"id":"iem_M_41.540_-82.730_1779230880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779230880000,"latitude":41.54,"longitude":-82.73},{"id":"iem_D_41.530_-82.780_1779230340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779230340000,"latitude":41.53,"longitude":-82.78}] |
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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