Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
7 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 13 September 2026 at 18:00 UTC. It is kept here as a record.
It is the 7th strongest of the 30 detections recorded within 20 km of this point since 11 June 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 13 at 11:43AM EDT until September 13 at 2:00PM EDT by NWS Boston/Norton MA
An estimated 1,461,654 people live within 50 km of this point.
Nearby, since 11 June 2026
- September 13, 2026 · score 46 · 0.0 km
- August 11, 2026 · score 52 · 1.7 km
- June 11, 2026 · score 46 · 10.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 82 % 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 | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 82% |
| Coordinates | 41.3022, -72.7023 |
| Nearest City | Guilford (2 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T15:43:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.0f0a8350035294dbe4f4129b14df4162b5e25e00.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Bristol, MA; Plymouth, MA; Bristol, MA; Bristol, RI; Kent, RI; Newport, RI; Providence, RI; Washington, RI; Fairfield, CT and 4 more areas |
| Headline | Flash Flood Warning issued September 13 at 11:43AM EDT until September 13 at 2:00PM EDT by NWS Boston/Norton MA |
| Expires | 2026-09-13T14:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0f0a8350035294dbe4f4129b14df4162b5e25e00.001.1","noaa_urn:oid:2.49.0.1.840.0.9ef98b854d555ea1e3c6fc1a06198fd33db3c078.001.1","noaa_urn:oid:2.49.0.1.840.0.07522d38e3eea70c93af855500adb2bc58b750d1.001.1","noaa_urn:oid:2.49.0.1.840.0.c7c8561550bb254a2772b422f298f8379ffcb086.001.1","noaa_urn:oid:2.49.0.1.840.0.c953ea8a53b73a57f81c195feec7890a7fec62df.001.1","noaa_urn:oid:2.49.0.1.840.0.dd526c76516ea33fecf42574450164c148b4e937.001.1","noaa_urn:oid:2.49.0.1.840.0.4fb361e8e5bd4f92767dd285bfa1c5ecbdf36a23.001.1"] |
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.
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