Right now
The most recent data we hold from NOAA arrived 4 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 02:00 UTC. It is kept here as a record.
It is the 5th strongest of the 250 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 21 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued July 28 at 7:48PM EDT until July 28 at 10:00PM EDT by NWS Mount Holly NJ
Urban PEI: 56,020 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 10, 2026 · score 39 · 7.9 km
- March 16, 2026 · score 51 · 7.9 km
- July 9, 2026 · score 39 · 11.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 51 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) | 51 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 39.0000, -75.7750 |
| Nearest City | Dover (28 km) |
| Urban exposure index (PEI) | 56.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-28T23:48:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Watch_noaa_urn:oid:2.49.0.1.840.0.893988accb0063bd3a76f34121cd7fc2 |
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: 2026-07-28T23:48:00.000Z.
First archived: 2026-07-29T00:36:05.607Z. 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 | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Coastal waters from Great Egg Inlet to Cape May NJ out 20 NM; Coastal waters from Cape May NJ to Cape Henlopen DE out 20 NM; Coastal waters from Cape Henlopen to Fenwick Island DE out 20 NM; Kent, DE; New Castle, DE; Sussex, DE; Caroline, MD; Kent, MD; Queen Anne's, MD; Talbot, MD; Atlantic, NJ; Burlington, NJ; Camden, NJ; Cape May, NJ; Cumberland, NJ; Gloucester, NJ; Ocean, NJ; Salem, NJ; Bucks, PA; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA; Coastal waters from Fenwick Island DE to Chincoteague VA out 20 NM and 1 more areas |
| Headline | Tornado Watch issued July 28 at 7:48PM EDT until July 28 at 10:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-28T22:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.893988accb0063bd3a76f34121cd7fc21a52711a.004.1","noaa_urn:oid:2.49.0.1.840.0.893988accb0063bd3a76f34121cd7fc21a52711a.003.1","noaa_urn:oid:2.49.0.1.840.0.014c2cdfc1500eae035811c1eb2fe69a83f4b1a8.004.1","noaa_urn:oid:2.49.0.1.840.0.014c2cdfc1500eae035811c1eb2fe69a83f4b1a8.003.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Dover?