Right now
The most recent data we hold from NOAA arrived 7 minutes 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 19 March 2026 at 11:15 UTC. It is kept here as a record.
No stronger detection stands among the 64 recorded within 20 km of this point since 18 March 2026 — 39 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 18 at 8:09PM PDT until March 22 at 2:49AM PDT by NWS Seattle WA
An estimated 1,207,727 people live within 50 km of this point.
Nearby, since 18 March 2026
- March 22, 2026 · score 52 · 1.7 km
- March 20, 2026 · score 52 · 2.3 km
- March 18, 2026 · score 52 · 3.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 81 % 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) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 47.8354, -121.7453 |
| Nearest City | Monroe (17 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-19T03:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.ba8f97bd3646a5eba82bc4270cc27d89 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | King, WA; Snohomish, WA; Chelan, WA |
| Headline | Flood Warning issued March 18 at 8:09PM PDT until March 22 at 2:49AM PDT by NWS Seattle WA |
| Expires | 2026-03-19T04:15:00-07:00 |
| SenderName | NWS Seattle WA |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ba8f97bd3646a5eba82bc4270cc27d89f550c7ed.001.1","noaa_urn:oid:2.49.0.1.840.0.fe92e6639b12d75043281189e069a1df5e6db791.001.1","noaa_urn:oid:2.49.0.1.840.0.abef9f9916a334b20e55c93b05fd479fd4d6da89.001.1","noaa_urn:oid:2.49.0.1.840.0.51b7e7830f8328c8ecc504e363fda4645a03a22e.001.1","noaa_urn:oid:2.49.0.1.840.0.a72a936bd6e2b3f3aa25b3ac28282b77b86dfec8.001.1","noaa_urn:oid:2.49.0.1.840.0.aec2f3d504306c5d2cfa72f1f4520d42ad999460.001.1","noaa_urn:oid:2.49.0.1.840.0.f05ae8af7e82e571c3b7e3742e10c48945c4053e.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 Monroe?
Calamity.live data shows a weather event with CalamityScore 52/100, near Monroe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.