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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 22 July 2026 at 11:15 UTC. It is kept here as a record.
It is the 613th strongest of the 735 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 21 at 7:12PM EDT until July 22 at 7:15AM EDT by NWS Upton NY
An estimated 27,730,644 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 21, 2026 · score 52 · 4.0 km
- August 7, 2026 · score 66 · 4.8 km
- July 21, 2026 · score 52 · 8.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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 v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 40.9356, -73.8306 |
| Nearest City | Mount Vernon (3 km) |
| Population Exposed | 27.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T23:12:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.93ebaaf449a46812de4bfab7b61c2f3a3961be5d.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Bronx, NY; Westchester, NY |
| Headline | Flood Warning issued July 21 at 7:12PM EDT until July 22 at 7:15AM EDT by NWS Upton NY |
| Expires | 2026-07-22T07:15:00-04:00 |
| SenderName | NWS Upton NY |
| 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 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 Mount Vernon?
Calamity.live data shows a weather event with CalamityScore 52/100, near Mount Vernon (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.