This alert expired on 10 August 2026 at 01:30 UTC. It is kept here as a record.
It is the 5th strongest of the 43 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 9 at 9:12PM EDT until August 9 at 9:30PM EDT by NWS Cleveland OH
An estimated 76,023 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 11, 2026 · score 43 · 12.9 km
- March 12, 2026 · score 39 · 13.8 km
- June 10, 2026 · score 43 · 19.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 85 % 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) | 39 / 100 |
| Our confidence | 85% |
| Coordinates | 41.3110, -82.8995 |
| Nearest City | Fremont (19 km) |
| Population Exposed | 76.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T01:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9e728a5586839c75caa3a03d96b05244 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Seneca, OH; Erie, OH; Huron, OH; Sandusky, OH; Seneca, OH; Ottawa, OH; Sandusky, OH; Seneca, OH |
| Headline | Severe Thunderstorm Warning issued August 9 at 9:12PM EDT until August 9 at 9:30PM EDT by NWS Cleveland OH |
| Expires | 2026-08-09T21:30:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9e728a5586839c75caa3a03d96b0524466cdac30.002.1","noaa_urn:oid:2.49.0.1.840.0.85b321b25ce51340dfe4dd0a71a3ba03f976e32d.001.1","noaa_urn:oid:2.49.0.1.840.0.ea34e14e18b04cd2405f2814e799dd7bae1651e5.002.1"] |
| Iem TypeSummary | D |
| Iem City | 4 SE Mccomb |
| Iem County | Hancock |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Fallen tree knocked power line onto house leading to a roof fire developing. Time estimated via radar. |
| MergedSources | [{"id":"iem_D_41.060_-83.730_1786322100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786322100000,"latitude":41.06,"longitude":-83.73}] |
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 Fremont?
Calamity.live data shows a weather event with CalamityScore 39/100, near Fremont (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.