This alert expired on 15 March 2026 at 14:00 UTC. It is kept here as a record.
It is the 7th strongest of the 18 detections recorded within 20 km of this point since 14 March 2026. The last comparable one was on 14 March 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 14 at 8:25PM PDT until March 15 at 7:00AM PDT by NWS Pendleton OR
An estimated 49,118 people live within 50 km of this point.
Nearby, since 14 March 2026
- March 16, 2026 · score 43 · 16.2 km
- March 14, 2026 · score 43 · 16.2 km
- March 15, 2026 · score 43 · 16.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 78 % 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) | 34 / 100 |
| Our confidence | 78% |
| Coordinates | 46.0090, -118.3977 |
| Nearest City | Walla Walla (7 km) |
| Population Exposed | 49.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T03:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood-Warning_noaa_urn-oid-2_49_0_1_840_0_f118bfe864816dbb3dc063ba5ad28b27 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Umatilla, OR; Walla Walla, WA; Columbia, WA; Walla Walla, WA |
| Headline | Flood Warning issued March 14 at 8:25PM PDT until March 15 at 7:00AM PDT by NWS Pendleton OR |
| Expires | 2026-03-15T07:00:00-07:00 |
| SenderName | NWS Pendleton OR |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f118bfe864816dbb3dc063ba5ad28b27db3866cf.001.1","noaa_urn:oid:2.49.0.1.840.0.9d6a05759408cb1de682c28a62003a8df2347869.001.1","noaa_urn:oid:2.49.0.1.840.0.7e1aed4c3cde02032ce986b3b57ca67c855ad70e.001.1","noaa_urn:oid:2.49.0.1.840.0.9c45eba9bb6a89167af9ec8beeffe81a8bdba9ca.001.1"] |
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 Walla Walla?
Calamity.live data shows a weather event with CalamityScore 34/100, near Walla Walla (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.