This alert expired on 4 July 2026 at 03:15 UTC. It is kept here as a record.
No stronger detection stands among the 99 recorded within 20 km of this point since 10 March 2026 — 62 others scored the same. The last comparable one was on 3 July 2026. 22 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 3 at 7:12PM CDT until July 3 at 10:15PM CDT by NWS Birmingham AL
An estimated 538,692 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 3, 2026 · score 48 · 1.8 km
- May 28, 2026 · score 48 · 3.3 km
- June 18, 2026 · score 48 · 4.3 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 33.4725, -86.7438 |
| Nearest City | Mountain Brook (3 km) |
| Population Exposed | 538.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:12:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, AL |
| Headline | Flash Flood Warning issued July 3 at 7:12PM CDT until July 3 at 10:15PM CDT by NWS Birmingham AL |
| Expires | 2026-07-03T22:15:00-05:00 |
| SenderName | NWS Birmingham AL |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Blountsville |
| Iem County | Blount |
| Iem State | AL |
| Iem Wfo | BMX |
| Iem Remark | A few trees down in the Blountsville area. One tree fell onto a car; no injuries. |
| MergedSources | [{"id":"iem_D_33.520_-86.810_1783122120000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122120000,"latitude":33.52,"longitude":-86.81},{"id":"iem_F_33.480_-86.790_1783124400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124400000,"latitude":33.48,"longitude":-86.79},{"id":"iem_D_33.950_-86.470_1783116000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783116000000,"latitude":33.95,"longitude":-86.47},{"id":"iem_D_34.080_-86.590_1783117380000","source":"iem","severity":"low","severityValue":25,"timestamp":1783117380000,"latitude":34.08,"longitude":-86.59}] |
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 48/100, near Mountain Brook (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.