Right now
The most recent data we hold from NOAA arrived 1 minute ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 21 March 2026 at 02:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 28 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Watch issued March 20 at 4:56PM PDT until March 21 at 5:00PM PDT by NWS Seattle WA
Nearby, since 12 March 2026
- August 2, 2026 · score 28 · 0.0 km
- August 1, 2026 · score 28 · 0.0 km
- May 29, 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 66 % 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 | 66% |
| Coordinates | 47.8000, -120.7000 |
| Nearest City | Wenatchee (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-20T23:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Watch_noaa_urn:oid:2.49.0.1.840.0.4d684bba6bf158cd9723653b0872f721 |
Score Breakdown
Technical Details
| Event | Flood Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Mason, WA; King, WA; Skagit, WA; Snohomish, WA; Whatcom, WA |
| Headline | Flood Watch issued March 20 at 4:56PM PDT until March 21 at 5:00PM PDT by NWS Seattle WA |
| Expires | 2026-03-20T19:45:00-07:00 |
| SenderName | NWS Seattle WA |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4d684bba6bf158cd9723653b0872f7218a864a89.001.1","noaa_urn:oid:2.49.0.1.840.0.4d684bba6bf158cd9723653b0872f7218a864a89.002.1"] |
| Iem TypeSummary | E |
| Iem City | 2 ESE Monitor |
| Iem County | Chelan |
| Iem State | WA |
| Iem Wfo | OTX |
| Iem Remark | EM reported Wenatchee River rerouted in a spot following December 2025 flood. Current river levels are resulting in flooding near Sleepy Hollow Road. Time and exact location estimated. |
| MergedSources | [{"id":"iem_E_47.480_-120.380_1774042200000","source":"iem","severity":"low","severityValue":25,"timestamp":1774042200000,"latitude":47.48,"longitude":-120.38}] |
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.