Right now
The most recent data we hold from NOAA arrived 29 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 10 August 2026 at 00:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 7 August 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 9 at 6:29PM CDT until August 9 at 7:00PM CDT by NWS Birmingham AL
An estimated 70,787 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 12, 2026 · score 39 · 18.2 km
- August 7, 2026 · score 34 · 18.8 km
- July 5, 2026 · score 43 · 20.7 km
How we know
Confirmed by 3 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 | 34.1885, -87.0669 |
| Nearest City | Cullman (21 km) |
| Population Exposed | 70.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-09T23:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.0cc7e21207e584d41eabaf3384dc9a05 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, AL; Shelby, AL; Marshall, AL; Morgan, AL; Colbert, AL; Lauderdale, AL |
| Headline | Flash Flood Warning issued August 9 at 6:29PM CDT until August 9 at 7:00PM CDT by NWS Birmingham AL |
| Expires | 2026-08-09T19:00:00-05:00 |
| SenderName | NWS Birmingham AL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0cc7e21207e584d41eabaf3384dc9a058d439227.001.1","noaa_urn:oid:2.49.0.1.840.0.836b1a7661697a1ef8088104df84b20da1aa7c2a.001.1","noaa_urn:oid:2.49.0.1.840.0.0bfbafabf8005bf4714579992f184d9317000c05.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 52 |
| Iem Unit | MPH |
| Iem City | 1 E Birmingham Internat |
| Iem County | Jefferson |
| Iem State | AL |
| Iem Wfo | BMX |
| MergedSources | [{"id":"iem_D_34.680_-87.560_1786315260000","source":"iem","severity":"low","severityValue":25,"timestamp":1786315260000,"latitude":34.68,"longitude":-87.56},{"id":"iem_G_33.570_-86.750_1786309320000","source":"iem","severity":"low","severityValue":25,"timestamp":1786309320000,"latitude":33.57,"longitude":-86.75}] |
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.
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