This alert expired on 11 August 2026 at 22:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 58 detections recorded within 20 km of this point since 10 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 11 at 4:55PM CDT until August 11 at 5:30PM CDT by NWS Birmingham AL
An estimated 57,546 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 2, 2026 · score 39 · 8.3 km
- March 16, 2026 · score 39 · 8.9 km
- June 7, 2026 · score 37 · 12.6 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.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 85% |
| Coordinates | 34.1280, -85.9630 |
| Nearest City | Gadsden (14 km) |
| Population Exposed | 57.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T21:55:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Etowah, AL |
| Headline | Severe Thunderstorm Warning issued August 11 at 4:55PM CDT until August 11 at 5:30PM CDT by NWS Birmingham AL |
| Expires | 2026-08-11T17:30:00-05:00 |
| SenderName | NWS Birmingham AL |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Gaylesville |
| Iem County | Cherokee |
| Iem State | AL |
| Iem Wfo | BMX |
| Iem Remark | Tree down reports at various parts of the county from multiple rounds of thunderstorms; sub-severe winds probable along with heavy rainfall. |
| MergedSources | [{"id":"iem_D_34.270_-85.560_1786478400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478400000,"latitude":34.27,"longitude":-85.56}] |
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 39/100, near Gadsden (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.