This alert expired on 3 August 2026 at 17:00 UTC. It is kept here as a record.
It is the 7th strongest of the 27 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 21 July 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 3 at 9:57AM EDT until August 3 at 1:00PM EDT by NWS Upton NY
An estimated 1,815,727 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 21, 2026 · score 46 · 13.0 km
- July 21, 2026 · score 46 · 13.7 km
- June 11, 2026 · score 46 · 15.3 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 92 % 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) | 46 / 100 |
| Our confidence | 92% |
| Coordinates | 41.3658, -72.8698 |
| Nearest City | North Haven (3 km) |
| Population Exposed | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-03T13:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.212dc243709f74d98b8e1b3b80415110 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Middlesex, CT; New Haven, CT; New London, CT; Bristol, MA; Bristol, RI; Kent, RI; Providence, RI; Washington, RI; Essex, NJ; Hudson, NJ; Union, NJ; Bronx, NY; Kings, NY; Nassau, NY; New York, NY; Queens, NY; Richmond, NY and 2 more areas |
| Headline | Flash Flood Warning issued August 3 at 9:57AM EDT until August 3 at 1:00PM EDT by NWS Upton NY |
| Expires | 2026-08-03T13:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.212dc243709f74d98b8e1b3b804151101cc36fc2.001.1","noaa_urn:oid:2.49.0.1.840.0.31e7a144fa523569e3ebddbf5ffb933f96d8e7d7.001.1","noaa_urn:oid:2.49.0.1.840.0.68ec86a25b60139b95ad96a122ce96ab12d006cd.001.1","noaa_urn:oid:2.49.0.1.840.0.303764933f6801ce5d5e8caba7e8f17a36ff0760.001.1","noaa_urn:oid:2.49.0.1.840.0.22d5c3c73e7d6239f2206c5a37ab9c39690f88e8.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 2.15 |
| Iem Unit | Inch |
| Iem City | 3 NNE Gaylordsville |
| Iem County | Litchfield |
| Iem State | CT |
| Iem Wfo | ALY |
| Iem Remark | Cocorahs station CT-LT-51 South Kent 0.1 SE. |
| MergedSources | [{"id":"iem_F_41.990_-72.570_1785753600000","source":"iem","severity":"low","severityValue":25,"timestamp":1785753600000,"latitude":41.99,"longitude":-72.57},{"id":"iem_R_41.750_-73.390_1785754800000","source":"iem","severity":"low","severityValue":25,"timestamp":1785754800000,"latitude":41.75,"longitude":-73.39},{"id":"iem_R_41.840_-73.010_1785754800000","source":"iem","severity":"low","severityValue":25,"timestamp":1785754800000,"latitude":41.84,"longitude":-73.01},{"id":"iem_R_41.810_-73.100_1785755340000","source":"iem","severity":"low","severityValue":25,"timestamp":1785755340000,"latitude":41.81,"longitude":-73.1},{"id":"iem_R_41.970_-73.220_1785756600000","source":"iem","severity":"low","severityValue":25,"timestamp":1785756600000,"latitude":41.97,"longitude":-73.22},{"id":"iem_R_41.680_-73.470_1785751200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785751200000,"latitude":41.68,"longitude":-73.47}] |
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.
Calamity.live data shows a weather event with CalamityScore 46/100, near North Haven (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.