This alert expired on 15 March 2026 at 22:00 UTC. It is kept here as a record.
It is the 7th strongest of the 19 detections recorded within 20 km of this point since 14 March 2026. 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: Flood Warning issued March 15 at 6:21AM PDT until March 15 at 9:00PM PDT by NWS Pendleton OR
An estimated 32,237 people live within 50 km of this point.
Nearby, since 14 March 2026
- March 15, 2026 · score 43 · 9.9 km
- March 16, 2026 · score 43 · 19.1 km
- March 14, 2026 · score 43 · 19.1 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 77 % 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 | 77% |
| Coordinates | 46.1135, -118.3802 |
| Nearest City | Walla Walla (7 km) |
| Population Exposed | 32.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T13:21:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood-Warning_noaa_urn-oid-2_49_0_1_840_0_9fc7cb7fdd1417abcab2fe92f00327f1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Walla Walla, WA; Columbia, WA; Walla Walla, WA |
| Headline | Flood Warning issued March 15 at 6:21AM PDT until March 15 at 9:00PM PDT by NWS Pendleton OR |
| Expires | 2026-03-15T15:00:00-07:00 |
| SenderName | NWS Pendleton OR |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9fc7cb7fdd1417abcab2fe92f00327f169a5d5cf.002.1","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.