This alert expired on 11 August 2026 at 10:00 UTC. It is kept here as a record.
It is the 5th strongest of the 47 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 5:35AM EDT until August 11 at 6:00AM EDT by NWS Cleveland OH
An estimated 432,507 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 11, 2026 · score 43 · 3.6 km
- June 14, 2026 · score 43 · 4.6 km
- August 11, 2026 · score 43 · 4.7 km
How we know
Confirmed by 9 independent sources, including NOAA.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 91% |
| Coordinates | 41.4657, -83.4587 |
| Nearest City | Perrysburg (18 km) |
| Population Exposed | 432.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T09:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b26cb5db196b5ac79ee2ef5cfe63c77a |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lucas, OH; Ottawa, OH; Sandusky, OH; Wood, OH; Ottawa, OH; Sandusky, OH; Wood, OH |
| Headline | Severe Thunderstorm Warning issued August 11 at 5:35AM EDT until August 11 at 6:00AM EDT by NWS Cleveland OH |
| Expires | 2026-08-11T06:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b26cb5db196b5ac79ee2ef5cfe63c77a86f25b46.001.1","noaa_urn:oid:2.49.0.1.840.0.10dff5ea6dd79fb4583a062e143eb100022d86f6.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 3 E Berkey |
| Iem County | Lucas |
| Iem State | OH |
| Iem Wfo | CLE |
| MergedSources | [{"id":"iem_M_41.700_-83.260_1786424400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786424400000,"latitude":41.7,"longitude":-83.26},{"id":"iem_H_41.760_-83.750_1786422180000","source":"iem","severity":"low","severityValue":25,"timestamp":1786422180000,"latitude":41.76,"longitude":-83.75},{"id":"iem_M_41.700_-83.260_1786425000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786425000000,"latitude":41.7,"longitude":-83.26},{"id":"iem_M_41.720_-83.370_1786424400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786424400000,"latitude":41.72,"longitude":-83.37},{"id":"iem_M_41.490_-82.700_1786423800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786423800000,"latitude":41.49,"longitude":-82.7},{"id":"iem_D_41.390_-82.670_1786422540000","source":"iem","severity":"low","severityValue":25,"timestamp":1786422540000,"latitude":41.39,"longitude":-82.67},{"id":"iem_M_41.440_-82.640_1786423860000","source":"iem","severity":"low","severityValue":25,"timestamp":1786423860000,"latitude":41.44,"longitude":-82.64},{"id":"iem_H_41.710_-83.770_1786422000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786422000000,"latitude":41.71,"longitude":-83.77}] |
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.
Want to know when something happens near Perrysburg?
Calamity.live data shows a weather event with CalamityScore 43/100, near Perrysburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.