This alert expired on 13 August 2026 at 13:15 UTC. It is kept here as a record.
No stronger detection stands among the 50 recorded within 20 km of this point since 17 March 2026 — 22 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 13 at 6:14AM EDT until August 13 at 9:15AM EDT by NWS Upton NY
An estimated 141,386 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 5, 2026 · score 43 · 2.1 km
- July 19, 2026 · score 43 · 10.8 km
- March 17, 2026 · score 43 · 12.0 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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 | 90% |
| Coordinates | 41.0750, -72.1855 |
| Nearest City | Waterford (30 km) |
| Population Exposed | 141.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T10:14:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e840b97f7fb28c057e9b9dec54d137f9dca7fce4.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Suffolk, NY |
| Headline | Flash Flood Warning issued August 13 at 6:14AM EDT until August 13 at 9:15AM EDT by NWS Upton NY |
| Expires | 2026-08-13T09:15:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 NNW Woodmont |
| Iem County | New Haven |
| Iem State | CT |
| Iem Wfo | OKX |
| Iem Remark | Down trees and utility poles have closed Marsh Hill Road between Salemme Lane and Executive Boulevard. |
| MergedSources | [{"id":"iem_D_41.260_-73.040_1786597800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786597800000,"latitude":41.26,"longitude":-73.04},{"id":"iem_M_41.090_-72.400_1786602600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786602600000,"latitude":41.09,"longitude":-72.4},{"id":"iem_M_40.970_-72.710_1786602900000","source":"iem","severity":"low","severityValue":25,"timestamp":1786602900000,"latitude":40.97,"longitude":-72.71},{"id":"iem_D_41.250_-73.000_1786601700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786601700000,"latitude":41.25,"longitude":-73}] |
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.
Want to know when something happens near Waterford?
Calamity.live data shows a weather event with CalamityScore 43/100, near Waterford (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.