This alert expired on 15 March 2026 at 03:00 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 8 March 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 12 at 11:19AM PDT until March 14 at 8:00PM PDT by NWS Spokane WA
Nearby, since 8 March 2026
- March 18, 2026 · score 22 · 0.0 km
- March 17, 2026 · score 22 · 0.0 km
- March 16, 2026 · score 22 · 0.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 63 % 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) | 22 / 100 |
| Our confidence | 63% |
| Coordinates | 48.3438, -120.7231 |
| Nearest City | Arlington (105 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-12T18:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_e56ed35a2bf8e7045a1b4111374b9e37efa65a6d_001_1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chelan, WA |
| Headline | Flood Warning issued March 12 at 11:19AM PDT until March 14 at 8:00PM PDT by NWS Spokane WA |
| Expires | 2026-03-14T20:00:00-07:00 |
| SenderName | NWS Spokane WA |
| HasExactCoords | true |
| Iem TypeSummary | Z |
| Iem City | 1 NE Stevens Pass |
| Iem County | Chelan |
| Iem State | WA |
| Iem Wfo | OTX |
| Iem Remark | Spotter recorded blizzard conditions on Stevens Pass. |
| MergedSources | [{"id":"iem_Z_47.750_-121.080_1773335040000","source":"iem","severity":"low","severityValue":25,"timestamp":1773335040000,"latitude":47.75,"longitude":-121.08}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.