This alert expired on 12 August 2026 at 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 11 at 6:16PM CDT until August 11 at 9:15PM CDT by NWS Huntsville AL
An estimated 69,799 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 24, 2026 · score 39 · 2.4 km
- August 11, 2026 · score 39 · 12.9 km
- July 24, 2026 · score 32 · 18.6 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 90 % 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 | 90% |
| Coordinates | 33.8727, -85.4577 |
| Nearest City | Anniston (42 km) |
| Population Exposed | 69.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T23:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.ecdfa55c0c86cc2bc2cfe4d20e370442 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | DeKalb, AL; Marshall, AL; Coweta, GA; Fayette, GA; Fulton, GA |
| Headline | Flash Flood Warning issued August 11 at 6:16PM CDT until August 11 at 9:15PM CDT by NWS Huntsville AL |
| Expires | 2026-08-11T21:15:00-05:00 |
| SenderName | NWS Huntsville AL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ecdfa55c0c86cc2bc2cfe4d20e370442c82dda47.001.1","noaa_urn:oid:2.49.0.1.840.0.410d58e11b19162784afe8425060613c2b920fcb.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 NE Gadsden Steam Plan |
| Iem County | Etowah |
| Iem State | AL |
| Iem Wfo | BMX |
| Iem Remark | A couple trees down, at least one involving power lines. |
| MergedSources | [{"id":"iem_D_33.700_-85.120_1786484100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786484100000,"latitude":33.7,"longitude":-85.12},{"id":"iem_D_34.270_-85.560_1786478400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478400000,"latitude":34.27,"longitude":-85.56},{"id":"iem_D_34.040_-85.940_1786485600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786485600000,"latitude":34.04,"longitude":-85.94}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 in this area?
Calamity.live data shows a weather event with CalamityScore 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.