This alert expired on 13 August 2026 at 21:07 UTC. It is kept here as a record.
No stronger detection stands among the 54 recorded within 20 km of this point since 15 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 13 at 2:57PM MDT until August 13 at 3:00PM MDT by NWS Pocatello ID
An estimated 86,847 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 13, 2026 · score 39 · 13.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 87 % 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 | 87% |
| Coordinates | 43.6529, -111.6843 |
| Nearest City | Rexburg (21 km) |
| Population Exposed | 86.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T20:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d28245e2120d1d6ab3d40cb4cc7677caba2e26e7.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, ID; Madison, ID |
| Headline | Flash Flood Warning issued August 13 at 2:57PM MDT until August 13 at 3:00PM MDT by NWS Pocatello ID |
| Expires | 2026-08-13T15:07:00-06:00 |
| SenderName | NWS Pocatello ID |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 3 NW Poplar |
| Iem County | Madison |
| Iem State | ID |
| Iem Wfo | PIH |
| Iem Remark | Snake River Road washed out and has debris over it in locations due to rapid runoff from the Big Rock burn scar. |
| MergedSources | [{"id":"iem_F_43.650_-111.700_1786649700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786649700000,"latitude":43.65,"longitude":-111.7},{"id":"iem_F_43.660_-111.720_1786648800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786648800000,"latitude":43.66,"longitude":-111.72}] |
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 near Rexburg?
Calamity.live data shows a weather event with CalamityScore 39/100, near Rexburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.