This alert expired on 23 March 2026 at 06:00 UTC. It is kept here as a record.
No stronger detection stands among the 56 recorded within 20 km of this point since 8 March 2026 — 51 others scored the same. The last comparable one was on 17 March 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 17 at 9:34PM PDT until March 22 at 11:00PM PDT by NWS Spokane WA
Nearby, since 8 March 2026
- March 17, 2026 · score 22 · 0.0 km
- March 16, 2026 · score 22 · 0.0 km
- March 12, 2026 · score 22 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 48.3438, -120.7231 |
| Nearest City | Arlington (105 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-18T04:34:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chelan, WA |
| Headline | Flood Warning issued March 17 at 9:34PM PDT until March 22 at 11:00PM PDT by NWS Spokane WA |
| Expires | 2026-03-22T23:00:00-07:00 |
| SenderName | NWS Spokane WA |
| HasExactCoords | true |
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 22/100, near Arlington (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.