This alert expired on 3 September 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 20 recorded within 20 km of this point since 17 March 2026 — one other scored the same. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Flash Flood Warning issued September 2 at 8:46PM EDT until September 3 at 12:45AM EDT by NWS Buffalo NY
An estimated 665,035 people live within 50 km of this point.
Nearby, since 17 March 2026
- September 2, 2026 · score 54 · 17.1 km
- September 3, 2026 · score 41 · 21.3 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 54 out of 100, at 91 % 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 | High |
| Calamity Score (ours) | 54 / 100 |
| Our confidence | 91% |
| Coordinates | 42.7630, -78.4026 |
| Nearest City | Depew (28 km) |
| Population Exposed | 665.0K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T00:46:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.94dd7a4ced0c672a435129392ed04fe431da268c.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Allegany, NY; Cattaraugus, NY; Erie, NY; Genesee, NY; Niagara, NY; Orleans, NY |
| Headline | Flash Flood Warning issued September 2 at 8:46PM EDT until September 3 at 12:45AM EDT by NWS Buffalo NY |
| Expires | 2026-09-03T00:45:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.94dd7a4ced0c672a435129392ed04fe431da268c.001.1","noaa_urn:oid:2.49.0.1.840.0.725674f121c30050ee2587f72843d92b1e3f1898.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 3 ESE Freedom |
| Spc County | Cattaraugus |
| Spc State | NY |
| Spc Comments | (BUF) |
| Iem TypeSummary | D |
| Iem City | 1 WNW Portageville |
| Iem County | Wyoming |
| Iem State | NY |
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 Depew?
Calamity.live data shows a weather event with CalamityScore 54/100, near Depew (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.