Severe Weather near Montville Center
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.
4 other detections within 20 km in the last 24 hours, the nearest 10 km from here.
This alert expired on 13 September 2026 at 17:05 UTC. It is kept here as a record.
It is the 4th strongest of the 17 detections recorded within 20 km of this point since 20 May 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 13 at 12:55PM EDT until September 13 at 1:00PM EDT by NWS Upton NY
An estimated 415,252 people live within 50 km of this point.
Nearby, since 20 May 2026
- September 13, 2026 · score 37 · 10.3 km
- June 7, 2026 · score 43 · 15.5 km
- July 4, 2026 · score 48 · 19.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 87 % 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) | 37 / 100 |
| Our confidence | 87% |
| Coordinates | 41.4342, -72.1824 |
| Nearest City | Montville Center (6 km) |
| Population Exposed | 415.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T16:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.191421bd6d936673ad32737e5a4c23bdc9542c73.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Bergen, NJ; Essex, NJ; Hudson, NJ; Passaic, NJ; Middlesex, CT; New London, CT; Bristol, MA; Plymouth, MA and 1 more areas |
| Headline | Flash Flood Warning issued September 13 at 12:55PM EDT until September 13 at 1:00PM EDT by NWS Upton NY |
| Expires | 2026-09-13T13:05:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.191421bd6d936673ad32737e5a4c23bdc9542c73.001.1","noaa_urn:oid:2.49.0.1.840.0.0ff1e5013044d5772a1de47f0af82f2f01a3fe86.001.1","noaa_urn:oid:2.49.0.1.840.0.3803085805f4856da1bf3e0bcfde3c3c668b8903.001.1","noaa_urn:oid:2.49.0.1.840.0.e5b3afdd27a79a65b85181c26cd4efbdbec150c8.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 SE Derby |
| Iem County | New Haven |
| Iem State | CT |
| Iem Wfo | OKX |
| Iem Remark | Several videos shared showing Rt 34 taking on water and becoming impassable. |
| MergedSources | [{"id":"iem_F_41.460_-72.440_1789309020000","source":"iem","severity":"low","severityValue":25,"timestamp":1789309020000,"latitude":41.46,"longitude":-72.44},{"id":"iem_F_41.300_-72.920_1789312320000","source":"iem","severity":"low","severityValue":25,"timestamp":1789312320000,"latitude":41.3,"longitude":-72.92},{"id":"iem_F_41.300_-72.920_1789306200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789306200000,"latitude":41.3,"longitude":-72.92},{"id":"iem_F_41.540_-72.090_1789311600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789311600000,"latitude":41.54,"longitude":-72.09},{"id":"iem_F_41.550_-72.110_1789311000000","source":"iem","severity":"low","severityValue":25,"timestamp":1789311000000,"latitude":41.55,"longitude":-72.11},{"id":"iem_F_41.300_-72.760_1789310760000","source":"iem","severity":"low","severityValue":25,"timestamp":1789310760000,"latitude":41.3,"longitude":-72.76},{"id":"iem_F_41.380_-72.710_1789309800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789309800000,"latitude":41.38,"longitude":-72.71},{"id":"iem_F_41.800_-71.430_1789314600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789314600000,"latitude":41.8,"longitude":-71.43},{"id":"iem_F_41.290_-72.780_1789309500000","source":"iem","severity":"low","severityValue":25,"timestamp":1789309500000,"latitude":41.29,"longitude":-72.78},{"id":"iem_F_41.800_-71.430_1789314300000","source":"iem","severity":"low","severityValue":25,"timestamp":1789314300000,"latitude":41.8,"longitude":-71.43},{"id":"iem_F_41.310_-73.060_1789308180000","source":"iem","severity":"low","severityValue":25,"timestamp":1789308180000,"latitude":41.31,"longitude":-73.06}] |
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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