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 28 July 2026 at 22:45 UTC. It is kept here as a record.
It is the 9th strongest of the 236 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 28 at 5:55PM EDT until July 28 at 6:45PM EDT by NWS Mount Holly NJ
Urban PEI: 2,549,049 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 10, 2026 · score 52 · 3.8 km
- July 28, 2026 · score 52 · 4.0 km
- March 17, 2026 · score 52 · 5.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.79/1 |
| Coordinates | 39.2109, -76.4472 |
| Nearest City | Dundalk (8 km) |
| Urban exposure index (PEI) | 2.5M within 50 km |
| Impact Tier | significant |
| Date | 2026-07-28 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.83136f62cd69fea902611edd657b0fea |
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: 2026-07-28 — time not reported.
First archived: 2026-07-28T21:56:20.786Z. 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 Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kent, MD; New Castle, DE; Chester, PA; Kent, DE; Caroline, MD; Queen Anne's, MD; Talbot, MD and 11 more areas |
| Headline | Severe Thunderstorm Warning issued July 28 at 5:55PM EDT until July 28 at 6:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-28T18:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.83136f62cd69fea902611edd657b0fea800cd0e9.001.1","noaa_urn:oid:2.49.0.1.840.0.f678c080598849cb2ed43d38cf744255ab135fd0.001.1","noaa_urn:oid:2.49.0.1.840.0.cea382426391117732f5a64de7b9d1f1c095d154.001.1","noaa_urn:oid:2.49.0.1.840.0.25c6b6658fb3d10c49908ff33669dd37d0a59376.001.1","noaa_urn:oid:2.49.0.1.840.0.5a2de2332c66947a880f734d50cd53c388df0e7c.001.1","noaa_urn:oid:2.49.0.1.840.0.046a50029848ddc51ac6bb97ba7f5387307a5014.001.1","noaa_urn:oid:2.49.0.1.840.0.0b2852920b11c165a08618e56d04621bdde58506.001.1","noaa_urn:oid:2.49.0.1.840.0.88cab47ac10679f8e6d7df05612a4575cb6bc995.001.1","noaa_urn:oid:2.49.0.1.840.0.4b4c425047cfe7e89de4b72feadba849833285e3.002.1","noaa_urn:oid:2.49.0.1.840.0.ab9777d4a9d7cd4e012bbba55c3393d5af7e659e.001.1","noaa_urn:oid:2.49.0.1.840.0.716414decd9685d483720e8d6eea2c7b2ae7aed1.001.1","noaa_urn:oid:2.49.0.1.840.0.ef909d2ba7adc1b4d4b813083878858dae6e3671.001.1","noaa_urn:oid:2.49.0.1.840.0.dcb571bfdd13bd23eadad0c0a476dadac97ca729.001.1","noaa_urn:oid:2.49.0.1.840.0.d3e00f4d0de6ef42c9fee825ddad0a55bc8a996f.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.
Want to know when something happens near Dundalk?