Right now
The most recent data we hold from NOAA arrived 6 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 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 65 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. 38 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 20 at 6:34AM PDT until March 21 at 8:39AM PDT by NWS Seattle WA
An estimated 1,207,727 people live within 50 km of this point.
Nearby, since 18 March 2026
- March 19, 2026 · score 52 · 2.3 km
- March 22, 2026 · score 52 · 2.9 km
- March 18, 2026 · score 52 · 3.4 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 | 47.8541, -121.7321 |
| Nearest City | Monroe (18 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-20T20:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1874952322b8e340839611edcc02306c |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Snohomish, WA; Chelan, WA; Skagit, WA and 2 more areas |
| Headline | Flood Warning issued March 20 at 6:34AM PDT until March 21 at 8:39AM PDT by NWS Seattle WA |
| Expires | 2026-03-20T14:45:00-07:00 |
| SenderName | NWS Seattle WA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1874952322b8e340839611edcc02306c057b40bd.001.1","noaa_urn:oid:2.49.0.1.840.0.fdb55f3bd0db541e7d4449a215c89fc00f23c4a0.001.1","noaa_urn:oid:2.49.0.1.840.0.806553d7f65f622991acf3a7c510d585ecb9f7f1.001.1","noaa_urn:oid:2.49.0.1.840.0.14453d306d9c152006cd12a990aaa5b4708e52d6.001.1","noaa_urn:oid:2.49.0.1.840.0.3998e1bde72ce2fd692a9b5d8941e4d14ae1244a.001.1","noaa_urn:oid:2.49.0.1.840.0.c1a90df29c34bf19cb55ce20b9a29d30ac723875.001.1","noaa_urn:oid:2.49.0.1.840.0.1c60ea5c9c5472936c1b7c1c92bedd40a580d9cb.001.1","noaa_urn:oid:2.49.0.1.840.0.143434af6188f22833fd184c8ec4fbddefdfed13.001.1","noaa_urn:oid:2.49.0.1.840.0.6bb655e42ccbd49b193e1dc17e8eef0f58c59185.001.1","noaa_urn:oid:2.49.0.1.840.0.b362aebc27483e1623115fc365c23f233d4b23e9.001.1","noaa_urn:oid:2.49.0.1.840.0.099ca6dc3e7338ac94524aa7e4e2660eb8929cfa.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.