This alert expired on 12 August 2026 at 02:15 UTC. It is kept here as a record.
It is the 5th strongest of the 120 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were 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 57,546 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 2, 2026 · score 39 · 7.7 km
- July 1, 2026 · score 43 · 14.9 km
- June 9, 2026 · score 39 · 15.0 km
How we know
Confirmed by 15 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 89 % 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 | 89% |
| Coordinates | 34.2573, -86.2053 |
| Nearest City | Albertville (1 km) |
| Population Exposed | 57.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T23:16:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | DeKalb, AL; Marshall, AL |
| 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 |
| Iem TypeSummary | D |
| Iem City | 2 NNE Gadsden |
| Iem County | Etowah |
| Iem State | AL |
| Iem Wfo | BMX |
| Iem Remark | Tree down reports in the Gadsden area, some involving power lines and partial or complete road blockage. |
| MergedSources | [{"id":"iem_D_34.330_-86.380_1786490880000","source":"iem","severity":"low","severityValue":25,"timestamp":1786490880000,"latitude":34.33,"longitude":-86.38},{"id":"iem_F_34.300_-86.270_1786490100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786490100000,"latitude":34.3,"longitude":-86.27},{"id":"iem_D_34.680_-86.010_1786480020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480020000,"latitude":34.68,"longitude":-86.01},{"id":"iem_D_34.670_-86.010_1786480020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480020000,"latitude":34.67,"longitude":-86.01},{"id":"iem_D_34.600_-86.060_1786479600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786479600000,"latitude":34.6,"longitude":-86.06},{"id":"iem_L_34.480_-86.350_1786474800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786474800000,"latitude":34.48,"longitude":-86.35},{"id":"iem_D_34.710_-85.850_1786481700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786481700000,"latitude":34.71,"longitude":-85.85},{"id":"iem_F_34.330_-86.370_1786493700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786493700000,"latitude":34.33,"longitude":-86.37},{"id":"iem_F_34.310_-86.270_1786490100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786490100000,"latitude":34.31,"longitude":-86.27},{"id":"iem_D_34.680_-86.020_1786480020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480020000,"latitude":34.68,"longitude":-86.02},{"id":"iem_F_34.310_-86.290_1786490100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786490100000,"latitude":34.31,"longitude":-86.29},{"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},{"id":"iem_D_34.040_-85.990_1786485000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786485000000,"latitude":34.04,"longitude":-85.99}] |
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 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 Albertville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.