This alert expired on 9 May 2026 at 23:06 UTC. It is kept here as a record.
No stronger detection stands among the 93 recorded within 20 km of this point since 11 March 2026 — 17 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 9 at 6:58PM EDT until May 9 at 7:00PM EDT by NWS Cleveland OH
An estimated 1,565,805 people live within 50 km of this point.
Nearby, since 11 March 2026
- April 1, 2026 · score 52 · 3.3 km
- August 10, 2026 · score 52 · 7.2 km
- June 25, 2026 · score 52 · 12.4 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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 | 89% |
| Coordinates | 41.5467, -81.5311 |
| Nearest City | South Euclid (3 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Date | 2026-05-09 — time not reported by the source |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.124c470cbea94092b8669c1d13d5fd11a5d684fa.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cuyahoga, OH; Geauga, OH; Lake, OH; Lorain, OH |
| Headline | Severe Thunderstorm Warning issued May 9 at 6:58PM EDT until May 9 at 7:00PM EDT by NWS Cleveland OH |
| Expires | 2026-05-09T19:06:00-04:00 |
| 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_41.500_-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_41.430_-82.360_1778364600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778364600000,"latitude":41.43,"longitude":-82.36},{"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 South Euclid (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.