Right now
The most recent data we hold from NOAA arrived this minute, 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 5 July 2026 at 05:00 UTC. It is kept here as a record.
It is the 10th strongest of the 98 detections recorded within 20 km of this point since 12 March 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: Severe Thunderstorm Watch issued July 4 at 7:20PM EDT until July 5 at 1:00AM EDT by NWS Boston/Norton MA
Urban PEI: 1,682,010 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 28, 2026 · score 58 · 0.0 km
- August 27, 2026 · score 58 · 0.0 km
- August 11, 2026 · score 58 · 0.0 km
How we know
16 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 | 41.6000, -72.7000 |
| Nearest City | Middletown (6 km) |
| Urban exposure index (PEI) | 1.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T23:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.ce09e1f1a72db7f53068d147550482cb |
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: 2026-07-04T23:20:00.000Z.
First archived: 2026-07-05T02:38:06.780Z. 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 | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Hartford, CT; Tolland, CT; Windham, CT; Bristol, RI; Kent, RI; Newport, RI; Washington, RI; Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River; Long Island Sound East of the Mouth of the Connecticut River; Long Island Sound West of New Haven CT/Port Jefferson NY; Peconic and Gardiners Bays; South Shore Bays from Jones Inlet through Shinnecock Bay; Moriches Inlet NY to Montauk Point NY out 20 NM; Fire Island Inlet NY to Moriches Inlet NY out 20 NM; Sandy Hook NJ to Fire Island Inlet NY out 20 NM; Fairfield, CT; Middlesex, CT; New Haven, CT; New London, CT; Nassau, NY; Suffolk, NY |
| Headline | Severe Thunderstorm Watch issued July 4 at 7:20PM EDT until July 5 at 1:00AM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-05T01:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ce09e1f1a72db7f53068d147550482cb54e75cd5.001.1","noaa_urn:oid:2.49.0.1.840.0.974e011e43064ff856343b01691ad6a5ef024d27.002.1","noaa_urn:oid:2.49.0.1.840.0.974e011e43064ff856343b01691ad6a5ef024d27.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 1 W Plainville |
| Iem County | Hartford |
| Iem State | CT |
| Iem Wfo | BOX |
| Iem Remark | In Plainville, Half Dollar sized hail fell. |
| MergedSources | [{"id":"iem_D_41.990_-73.420_1783206420000","source":"iem","severity":"low","severityValue":25,"timestamp":1783206420000,"latitude":41.99,"longitude":-73.42},{"id":"iem_D_41.600_-72.880_1783210020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210020000,"latitude":41.6,"longitude":-72.88},{"id":"iem_D_41.770_-72.970_1783208940000","source":"iem","severity":"low","severityValue":25,"timestamp":1783208940000,"latitude":41.77,"longitude":-72.97},{"id":"iem_D_41.680_-72.940_1783209540000","source":"iem","severity":"low","severityValue":25,"timestamp":1783209540000,"latitude":41.68,"longitude":-72.94},{"id":"iem_M_41.280_-72.910_1783212840000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212840000,"latitude":41.28,"longitude":-72.91},{"id":"iem_D_41.680_-72.940_1783212000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212000000,"latitude":41.68,"longitude":-72.94},{"id":"iem_D_40.980_-72.540_1783217100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783217100000,"latitude":40.98,"longitude":-72.54},{"id":"iem_D_41.600_-72.880_1783212000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212000000,"latitude":41.6,"longitude":-72.88},{"id":"iem_D_41.460_-72.870_1783212480000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212480000,"latitude":41.46,"longitude":-72.87},{"id":"iem_D_40.980_-72.540_1783215000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783215000000,"latitude":40.98,"longitude":-72.54},{"id":"iem_D_41.850_-73.310_1783207200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783207200000,"latitude":41.85,"longitude":-73.31},{"id":"iem_G_41.750_-73.000_1783208400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783208400000,"latitude":41.75,"longitude":-73},{"id":"iem_H_41.680_-72.940_1783209300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783209300000,"latitude":41.68,"longitude":-72.94},{"id":"iem_H_41.680_-72.790_1783210020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210020000,"latitude":41.68,"longitude":-72.79},{"id":"iem_H_41.670_-72.910_1783209540000","source":"iem","severity":"low","severityValue":25,"timestamp":1783209540000,"latitude":41.67,"longitude":-72.91}] |
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 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.
Want to know when something happens near Middletown?