Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
12 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 13 September 2026 at 14:00 UTC. It is kept here as a record.
It is the 658th strongest of the 725 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 31 August 2026. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 13 at 7:06AM EDT until September 13 at 10:00AM EDT by NWS Upton NY
An estimated 27,622,619 people live within 50 km of this point.
Nearby, since 10 March 2026
- September 13, 2026 · score 46 · 0.0 km
- June 12, 2026 · score 52 · 3.6 km
- July 21, 2026 · score 52 · 4.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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 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) | 46 / 100 |
| Our confidence | 81% |
| Coordinates | 40.9483, -74.0001 |
| Nearest City | Dumont (1 km) |
| Population Exposed | 27.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T11:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.be16deab50623738ac9f58d6e84eeb7653a13674.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Fairfield, CT; Bergen, NJ; Essex, NJ; Hudson, NJ; Passaic, NJ; Morris, NJ |
| Headline | Flash Flood Warning issued September 13 at 7:06AM EDT until September 13 at 10:00AM EDT by NWS Upton NY |
| Expires | 2026-09-13T10:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.be16deab50623738ac9f58d6e84eeb7653a13674.001.1","noaa_urn:oid:2.49.0.1.840.0.b53a35a0012acb4e2f8c03a0a12033d67876d345.001.1","noaa_urn:oid:2.49.0.1.840.0.befd183cba950bc4c0f1ec7e95a31cd53a8fbdbd.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.
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