This alert expired on 11 August 2026 at 05:00 UTC. It is kept here as a record.
It is the 10th strongest of the 30 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 10 August 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 12:46AM EDT until August 11 at 1:00AM EDT by NWS Cleveland OH
An estimated 809,017 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 14, 2026 · score 52 · 4.1 km
- June 10, 2026 · score 46 · 5.3 km
- July 4, 2026 · score 48 · 9.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 85 % 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) | 48 / 100 |
| Our confidence | 85% |
| Coordinates | 41.2083, -82.1600 |
| Nearest City | Elyria (18 km) |
| Population Exposed | 809.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T04:46:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8ac6faab67f10df27ffd5f7f3157a14a5fab0996.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cuyahoga, OH; Erie, OH; Lorain, OH; Medina, OH; Summit, OH; Wayne, OH |
| Headline | Severe Thunderstorm Warning issued August 11 at 12:46AM EDT until August 11 at 1:00AM EDT by NWS Cleveland OH |
| Expires | 2026-08-11T01:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Savannah |
| Iem County | Ashland |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Widespread power outages in Northern Ashland County with trees and power lines down along S Main St in Savannah. Damage seems to be isolated to the US 250 corridor. |
| MergedSources | [{"id":"iem_D_40.970_-82.360_1786422420000","source":"iem","severity":"low","severityValue":25,"timestamp":1786422420000,"latitude":40.97,"longitude":-82.36}] |
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 48/100, near Elyria (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.