Right now
The most recent data we hold from NOAA arrived 2 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 3 August 2026 at 14:00 UTC. It is kept here as a record.
It is the 47th strongest of the 76 detections recorded within 20 km of this point since 20 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 3 at 6:49AM EDT until August 3 at 10:00AM EDT by NWS Boston/Norton MA
Urban PEI: 1,799,995 within a heuristic 50 km radius; not unique people.
Nearby, since 20 May 2026
- August 8, 2026 · score 52 · 3.2 km
- July 7, 2026 · score 52 · 4.5 km
- July 6, 2026 · score 52 · 4.5 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 46 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 46 / 100 |
| Legacy data-support index | 0.92/1 |
| Coordinates | 41.4008, -73.5108 |
| Nearest City | Danbury (5 km) |
| Urban exposure index (PEI) | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-03T10:49:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.bdb139ca27510f8b8db77dfc2dc00e58 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-08-03T10:49:00.000Z.
First archived: 2026-08-03T11:18:12.312Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Middlesex, MA; Worcester, MA; Litchfield, CT; Dutchess, NY and 5 more areas |
| Headline | Flash Flood Warning issued August 3 at 6:49AM EDT until August 3 at 10:00AM EDT by NWS Boston/Norton MA |
| Expires | 2026-08-03T10:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bdb139ca27510f8b8db77dfc2dc00e588e2d6323.001.1","noaa_urn:oid:2.49.0.1.840.0.8629758da1f64cdcbb72d41e991c5363bee088c3.001.1","noaa_urn:oid:2.49.0.1.840.0.07e14785f27559ab36569b2ee15917d2a2989989.001.1","noaa_urn:oid:2.49.0.1.840.0.d9aa33e2a44a508b2f5b4d04d4d6abcf3e293b68.001.1","noaa_urn:oid:2.49.0.1.840.0.09ddbfb9f0fc506fee15b65a911c8ea1125f67b5.001.1","noaa_urn:oid:2.49.0.1.840.0.f3a38665a1a423b7696ffd2b0fd56bac3f5bc244.001.1","noaa_urn:oid:2.49.0.1.840.0.7a6e027e8981f702f3c385cd25e290e8901fca50.001.1","noaa_urn:oid:2.49.0.1.840.0.2a7a97383468a3018f0cc273b2a01746f7834646.001.1"] |
| Iem TypeSummary | O |
| Iem City | 2 E Cold Spring |
| Iem County | Putnam |
| Iem State | NY |
| Iem Wfo | OKX |
| Iem Remark | Corrects previous tstm wnd dmg report from 2 E Cold Spring. Tree down with downed wires and road closure on US 9, both directions, south of Eyrie road, all lanes of 2 lanes closed. |
| MergedSources | [{"id":"iem_D_41.420_-73.910_1785745020000","source":"iem","severity":"low","severityValue":25,"timestamp":1785745020000,"latitude":41.42,"longitude":-73.91},{"id":"iem_F_40.980_-74.080_1785748320000","source":"iem","severity":"low","severityValue":25,"timestamp":1785748320000,"latitude":40.98,"longitude":-74.08},{"id":"iem_O_41.420_-73.910_1785745020000","source":"iem","severity":"low","severityValue":25,"timestamp":1785745020000,"latitude":41.42,"longitude":-73.91}] |
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.
Review the area, threshold and delivery channel in your account.
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