This alert expired on 5 July 2026 at 01:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 184 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 8:44PM EDT until July 4 at 9:45PM EDT by NWS Upton NY
An estimated 3,241,956 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 6, 2026 · score 52 · 7.3 km
- March 17, 2026 · score 52 · 8.8 km
- August 6, 2026 · score 58 · 9.1 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 40.5594, -74.6587 |
| Nearest City | Bridgewater (5 km) |
| Population Exposed | 3.2M within 50 km |
| Impact Tier | significant |
| Date | 2026-07-05 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.031b8d117d255fb29d053efc7209913d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Middlesex, CT; New London, CT; Litchfield, CT; Fairfield, CT; New Haven, CT; Suffolk, NY and 13 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 8:44PM EDT until July 4 at 9:45PM EDT by NWS Upton NY |
| Expires | 2026-07-04T21:45:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.031b8d117d255fb29d053efc7209913d94dfb4be.001.1","noaa_urn:oid:2.49.0.1.840.0.df18aef78fd5afb359e4ac5234668c58065c30ab.001.1","noaa_urn:oid:2.49.0.1.840.0.1e2a95bd4ccbe5e4d85697f4040f5648fc3804d6.001.1","noaa_urn:oid:2.49.0.1.840.0.ef32cbebfb336c7f86808941d8087fe63cd8d207.001.1","noaa_urn:oid:2.49.0.1.840.0.41100706dcd8546e22e9e24b5867468f32899269.001.1","noaa_urn:oid:2.49.0.1.840.0.30b63562cabd8287b997309d535db1b246935098.001.1","noaa_urn:oid:2.49.0.1.840.0.af871216311a2b54ddfac97a9166c7a1440fbe84.001.1","noaa_urn:oid:2.49.0.1.840.0.a0141f602286133bae2c55c304282efd800e96b4.001.1","noaa_urn:oid:2.49.0.1.840.0.a75c3187fa35942714a1550a51e7bfb28732c5fa.001.1","noaa_urn:oid:2.49.0.1.840.0.a34fff077e002f7ae352a8af497d276bfbe5f623.001.1","noaa_urn:oid:2.49.0.1.840.0.64d0c44617543c62fab163ec70cef75ef08f14e5.001.1","noaa_urn:oid:2.49.0.1.840.0.4b7c944909157247344496cf378477bf0801e8ba.001.1","noaa_urn:oid:2.49.0.1.840.0.e4e8ce5b15daf680adf5b0ad3fdfddc6a1da64c0.001.1","noaa_urn:oid:2.49.0.1.840.0.c587d3e44a6f60583ac4143a2f55224dcf19d0e7.001.1","noaa_urn:oid:2.49.0.1.840.0.a00a63d33a41966f49fce7a7b490709ce8535def.001.1","noaa_urn:oid:2.49.0.1.840.0.d98ff1b69b0c4d53fe3be5b42fca2daa4f114272.002.1"] |
| Iem TypeSummary | D |
| Iem City | Blairstown Twp |
| Iem County | Warren |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Several trees and wires down across Blairstown. Time estimated by radar. |
| MergedSources | [{"id":"iem_D_41.040_-75.130_1783205520000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205520000,"latitude":41.04,"longitude":-75.13},{"id":"iem_D_41.060_-75.070_1783205700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205700000,"latitude":41.06,"longitude":-75.07},{"id":"iem_D_40.980_-74.160_1783210320000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210320000,"latitude":40.98,"longitude":-74.16},{"id":"iem_D_41.220_-74.820_1783206540000","source":"iem","severity":"low","severityValue":25,"timestamp":1783206540000,"latitude":41.22,"longitude":-74.82},{"id":"iem_D_41.010_-74.170_1783210140000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210140000,"latitude":41.01,"longitude":-74.17},{"id":"iem_D_40.960_-74.140_1783210020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210020000,"latitude":40.96,"longitude":-74.14},{"id":"iem_D_41.160_-74.740_1783206540000","source":"iem","severity":"low","severityValue":25,"timestamp":1783206540000,"latitude":41.16,"longitude":-74.74},{"id":"iem_D_41.050_-75.090_1783205700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205700000,"latitude":41.05,"longitude":-75.09},{"id":"iem_D_40.980_-74.960_1783206600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783206600000,"latitude":40.98,"longitude":-74.96}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 52/100, near Bridgewater (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.