Right now
The most recent data we hold from NOAA arrived 37 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert expired on 14 September 2026 at 03:45 UTC. It is kept here as a record.
It is the 26th strongest of the 33 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 13 September 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Watch issued September 13 at 7:38PM PDT until September 13 at 8:00PM PDT by NWS Spokane WA
Nearby, since 12 March 2026
- September 13, 2026 · score 16 · 0.0 km
- August 2, 2026 · score 28 · 0.0 km
- August 1, 2026 · score 28 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 47.8000, -120.7000 |
| Nearest City | Wenatchee (51 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-14T02:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1870c75d81f5d01edb92b55f2dd1ab67c7e2c8f0.001.1 |
Physical priority index · v4 (historical). Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-14T02:38:00.000Z.
First archived: 2026-09-14T02:40:48.645Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flood Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Chelan, WA; Douglas, WA; Ferry, WA; Grant, WA; Okanogan, WA; Stevens, WA |
| Headline | Flood Watch issued September 13 at 7:38PM PDT until September 13 at 8:00PM PDT by NWS Spokane WA |
| Expires | 2026-09-13T20:45:00-07:00 |
| SenderName | NWS Spokane WA |
| HasExactCoords | false |
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.
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