Right now
The most recent data we hold from NOAA arrived 8 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 23 June 2026 at 12:15 UTC. It is kept here as a record.
No stronger detection stands among the 30 recorded within 20 km of this point since 16 March 2026 — 5 others scored the same. The last comparable one was on 17 March 2026.
What the source measured
NOAA reported: Flash Flood Warning issued June 23 at 5:07AM EDT until June 23 at 8:15AM EDT by NWS Boston/Norton MA
Urban PEI: 1,463,280 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 23, 2026 · score 52 · 0.0 km
- July 21, 2026 · score 52 · 9.6 km
- July 22, 2026 · score 52 · 19.7 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 41.6514, -71.1479 |
| Nearest City | Fall River (5 km) |
| Urban exposure index (PEI) | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T09:07:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.73081c07c5d0671c9968db23eb8ef7b737ccfc6d.001.1 |
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: 2026-06-23T09:07:00.000Z.
First archived: 2026-06-23T09:53:48.688Z. 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 | Bristol, MA; Plymouth, MA; Newport, RI |
| Headline | Flash Flood Warning issued June 23 at 5:07AM EDT until June 23 at 8:15AM EDT by NWS Boston/Norton MA |
| Expires | 2026-06-23T08:15:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 2 NW Westport |
| Iem County | Bristol |
| Iem State | MA |
| Iem Wfo | BOX |
| Iem Remark | Mass State Police has closed Route 24 southbound to the I-195 westbound on ramp due to flooding up to 3 ft in depth. relayed by amateur radio. |
| MergedSources | [{"id":"iem_F_41.690_-71.160_1782207840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782207840000,"latitude":41.69,"longitude":-71.16},{"id":"iem_F_41.680_-71.120_1782206700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782206700000,"latitude":41.68,"longitude":-71.12}] |
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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