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 20 March 2026 at 08:30 UTC. It is kept here as a record.
It is the 50th strongest of the 59 detections recorded within 20 km of this point since 18 March 2026. The last comparable one was on 19 March 2026. 27 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 19 at 5:30PM PDT until March 20 at 5:15AM PDT by NWS Seattle WA
An estimated 486,056 people live within 50 km of this point.
Nearby, since 18 March 2026
- March 18, 2026 · score 52 · 10.3 km
- March 22, 2026 · score 52 · 12.0 km
- March 20, 2026 · score 52 · 12.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 82 % 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) | 43 / 100 |
| Our confidence | 82% |
| Coordinates | 47.8324, -121.5639 |
| Nearest City | Monroe (30 km) |
| Population Exposed | 486.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-20T07:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.47d04fcbc0b8c594849e04b28b5eebdf |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Snohomish, WA; Skagit, WA; Yakima, WA and 2 more areas |
| Headline | Flood Warning issued March 19 at 5:30PM PDT until March 20 at 5:15AM PDT by NWS Seattle WA |
| Expires | 2026-03-20T01:30:00-07:00 |
| SenderName | NWS Seattle WA |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.47d04fcbc0b8c594849e04b28b5eebdf84fd8ffc.001.1","noaa_urn:oid:2.49.0.1.840.0.bfaa7497e122efe390d906937e34df09a608e99a.001.1","noaa_urn:oid:2.49.0.1.840.0.099ca6dc3e7338ac94524aa7e4e2660eb8929cfa.001.1","noaa_urn:oid:2.49.0.1.840.0.887d1f4ac0428c094e27c2253fcc24cec88fc193.003.1","noaa_urn:oid:2.49.0.1.840.0.61abbc09e17a655d851adaaabdbcfc64797560ec.003.1","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 43/100, near Monroe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.