This alert expired on 14 March 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 7 recorded within 20 km of this point since 12 March 2026 — 5 others scored the same. The last comparable one was on 12 March 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 13 at 9:45AM PDT until March 13 at 11:36PM PDT by NWS Portland OR
An estimated 53,601 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 14, 2026 · score 39 · 15.6 km
- March 12, 2026 · score 34 · 17.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 79% |
| Coordinates | 46.3140, -122.9073 |
| Nearest City | Longview (20 km) |
| Population Exposed | 53.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-13T23:50:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Wahkiakum, WA; Clackamas, OR; Multnomah, OR; Thurston, WA and 1 more areas |
| Headline | Flood Warning issued March 13 at 9:45AM PDT until March 13 at 11:36PM PDT by NWS Portland OR |
| Expires | 2026-03-13T21:45:00-07:00 |
| SenderName | NWS Portland OR |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0b8042622e80e44e084cfc09f56020b97e68bb51.001.1","noaa_urn:oid:2.49.0.1.840.0.0097d3fa91850f5685c4aace4adfe5c29b6ca539.001.1","noaa_urn:oid:2.49.0.1.840.0.f6d8cb07adc42d07acc0e732d4381712cfeb2528.002.1","noaa_urn:oid:2.49.0.1.840.0.f6d8cb07adc42d07acc0e732d4381712cfeb2528.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 39/100, near Longview (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.