Right now
The most recent data we hold from NOAA arrived 24 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 17 March 2026 at 03:30 UTC. It is kept here as a record.
It is the 109th strongest of the 253 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 87 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 10:47PM EDT until March 16 at 11:30PM EDT by NWS Mount Holly NJ
An estimated 84,806 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 17, 2026 · score 63 · 4.1 km
- August 27, 2026 · score 34 · 5.8 km
- August 8, 2026 · score 34 · 5.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 39 / 100 |
| Our confidence | 77% |
| Coordinates | 39.0515, -75.4942 |
| Nearest City | Dover (12 km) |
| Population Exposed | 84.8K within 50 km |
| Impact Tier | significant |
| Date | 2026-03-17 — 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.f77bfd8ef382029e7c1981ed1a1b6c5c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bucks, PA; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA; Kent, DE; New Castle, DE; Sussex, DE; Berks, PA; Chester, PA; Montgomery, PA and 7 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 10:47PM EDT until March 16 at 11:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-16T23:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f77bfd8ef382029e7c1981ed1a1b6c5c33dc95c8.001.1","noaa_urn:oid:2.49.0.1.840.0.2361a422ba6204a0ff70c24dbe084b7f1b161e5c.002.1","noaa_urn:oid:2.49.0.1.840.0.2cf7b874eb871ba39afa7290936bce4056153b35.001.1","noaa_urn:oid:2.49.0.1.840.0.f2e124ada15e7d7962a3c07e8f9c0030082bf312.002.1","noaa_urn:oid:2.49.0.1.840.0.d08a243df67464c9879d5d45d67c528954477bc0.001.1","noaa_urn:oid:2.49.0.1.840.0.d90257767dc1d69a6bc694a080ed15926522b8a1.001.1","noaa_urn:oid:2.49.0.1.840.0.c4340d333e8863b8f1bcde22907da7e768087f84.001.1","noaa_urn:oid:2.49.0.1.840.0.6d80e3b1cc474670343e63f041dfe833839bb6cc.001.1","noaa_urn:oid:2.49.0.1.840.0.abd4a47b6727d2e8efa61172cd6ac282a4c32018.002.1","noaa_urn:oid:2.49.0.1.840.0.abca594f2c442f596fdd5fa2f9bb1f050565623d.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.
Want to know when something happens near Dover?
Calamity.live data shows a weather event with CalamityScore 39/100, near Dover (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.