This alert expired on 13 March 2026 at 06:00 UTC. It is kept here as a record.
What the source measured
NOAA reported: Flood Warning issued March 12 at 3:30PM PDT by NWS Seattle WA
An estimated 193,694 people live within 50 km of this point.
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 78 % 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) | 43 / 100 |
| Our confidence | 78% |
| Coordinates | 47.3257, -123.1829 |
| Nearest City | Olympia (38 km) |
| Population Exposed | 193.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T22:30:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mason, WA |
| Headline | Flood Warning issued March 12 at 3:30PM PDT by NWS Seattle WA |
| Expires | 2026-03-12T23:00:00-07:00 |
| SenderName | NWS Seattle WA |
| HasExactCoords | true |
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 43/100, near Olympia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.