Right now
The most recent data we hold from NOAA arrived 5 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 29 July 2026 at 00:00 UTC. It is kept here as a record.
It is the 45th strongest of the 156 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 28 at 2:29PM EDT until July 28 at 8:00PM EDT by NWS Upton NY
Urban PEI: 543,913 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- June 12, 2026 · score 37 · 6.2 km
- March 17, 2026 · score 52 · 10.1 km
- September 2, 2026 · score 46 · 11.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 39.4333, -75.1667 |
| Nearest City | Bridgeton (5 km) |
| Urban exposure index (PEI) | 543.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-28T18:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.6b18c9ca804c9ca3fc4f4813b569744a |
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: 2026-07-28T18:29:00.000Z.
First archived: 2026-07-28T18:47:10.669Z. 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 | Bergen, NJ; Essex, NJ; Hudson, NJ; Passaic, NJ; Union, NJ; Delaware Bay waters north of East Point NJ to Slaughter Beach DE; New Castle, DE; Atlantic, NJ; Burlington, NJ; Camden, NJ; Cumberland, NJ; Gloucester, NJ; Hunterdon, NJ; Mercer, NJ; Middlesex, NJ; Monmouth, NJ; Morris, NJ; Ocean, NJ; Salem, NJ; Somerset, NJ; Sussex, NJ; Warren, NJ; Berks, PA; Bucks, PA; Carbon, PA; Chester, PA; Delaware, PA; Lehigh, PA; Monroe, PA; Montgomery, PA; Northampton, PA; Philadelphia, PA |
| Headline | Severe Thunderstorm Watch issued July 28 at 2:29PM EDT until July 28 at 8:00PM EDT by NWS Upton NY |
| Expires | 2026-07-28T20:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6b18c9ca804c9ca3fc4f4813b569744a4ed7fae5.002.1","noaa_urn:oid:2.49.0.1.840.0.9c58653aca8a7c2ae07b34c4881e5fe26bc4e666.002.1","noaa_urn:oid:2.49.0.1.840.0.9c58653aca8a7c2ae07b34c4881e5fe26bc4e666.001.1"] |
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.
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