This alert expired on 10 May 2026 at 05:30 UTC. It is kept here as a record.
No stronger detection stands among the 80 recorded within 20 km of this point since 11 March 2026 — 25 others scored the same. The last comparable one was on 9 May 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 10 at 12:23AM EDT until May 10 at 1:30AM EDT by NWS Cleveland OH
An estimated 1,543,887 people live within 50 km of this point.
Nearby, since 11 March 2026
- June 25, 2026 · score 46 · 1.3 km
- May 10, 2026 · score 52 · 3.9 km
- July 18, 2026 · score 52 · 5.8 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 41.5225, -81.8975 |
| Nearest City | Bay Village (5 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-10T04:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6a4c34525681dd25f0d9fceb730e5f2d42776e12.001.1 |
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 10 at 12:23AM EDT until May 10 at 1:30AM EDT by NWS Cleveland OH |
| Expires | 2026-05-10T01:30:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 47 |
| Iem Unit | MPH |
| Iem City | 3 E South Amherst |
| Iem County | Lorain |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | ASOS station KLPR Lorain Elyria. |
| MergedSources | [{"id":"iem_M_41.760_-81.280_1778365800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365800000,"latitude":41.76,"longitude":-81.28},{"id":"iem_M_41.500_-81.730_1778365500000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365500000,"latitude":41.5,"longitude":-81.73},{"id":"iem_G_41.420_-81.850_1778365740000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365740000,"latitude":41.42,"longitude":-81.85},{"id":"iem_G_41.520_-81.680_1778366160000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366160000,"latitude":41.52,"longitude":-81.68},{"id":"iem_M_41.760_-81.330_1778366400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366400000,"latitude":41.76,"longitude":-81.33},{"id":"iem_M_41.590_-81.580_1778365800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365800000,"latitude":41.59,"longitude":-81.58},{"id":"iem_D_41.410_-81.780_1778365920000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365920000,"latitude":41.41,"longitude":-81.78},{"id":"iem_D_41.570_-81.390_1778366280000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366280000,"latitude":41.57,"longitude":-81.39},{"id":"iem_G_41.350_-82.180_1778366040000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366040000,"latitude":41.35,"longitude":-82.18}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Bay Village (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.