This alert expired on 8 August 2026 at 04:36 UTC. It is kept here as a record.
It is the 5th strongest of the 26 detections recorded within 20 km of this point since 24 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued August 7 at 11:26PM CDT until August 7 at 11:30PM CDT by NWS Tulsa OK
An estimated 141,018 people live within 50 km of this point.
Nearby, since 24 May 2026
- August 7, 2026 · score 43 · 0.3 km
- June 14, 2026 · score 67 · 3.9 km
- June 22, 2026 · score 43 · 9.9 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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) | 43 / 100 |
| Our confidence | 91% |
| Coordinates | 36.2550, -93.5850 |
| Nearest City | Rogers (49 km) |
| Population Exposed | 141.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T04:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.14bd4b97eff3f58230c7c78cd08e371d9f7c65cb.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Carroll, AR; Madison, AR |
| Headline | Flood Warning issued August 7 at 11:26PM CDT until August 7 at 11:30PM CDT by NWS Tulsa OK |
| Expires | 2026-08-07T23:36:00-05:00 |
| SenderName | NWS Tulsa OK |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Marble |
| Iem County | Madison |
| Iem State | AR |
| Iem Wfo | TSA |
| Iem Remark | Photos of tree and building damage in Marble relayed by broadcast media. Time estimated by radar. |
| MergedSources | [{"id":"iem_G_36.260_-93.150_1786145760000","source":"iem","severity":"low","severityValue":25,"timestamp":1786145760000,"latitude":36.26,"longitude":-93.15},{"id":"iem_H_36.330_-93.440_1786143600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786143600000,"latitude":36.33,"longitude":-93.44},{"id":"iem_D_36.140_-93.590_1786145100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786145100000,"latitude":36.14,"longitude":-93.59}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.