This alert expired on 17 March 2026 at 04:00 UTC. It is kept here as a record.
It is the 11th strongest of the 181 detections recorded within 20 km of this point since 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued March 16 at 8:23PM EDT until March 17 at 12:00AM EDT by NWS Mount Holly NJ
An estimated 116,699 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 10, 2026 · score 37 · 4.5 km
- June 15, 2026 · score 43 · 6.0 km
- June 10, 2026 · score 37 · 7.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 78 % 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) | 43 / 100 |
| Our confidence | 78% |
| Coordinates | 39.1857, -75.8286 |
| Nearest City | Dover (27 km) |
| Population Exposed | 116.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T00:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm; Coastal waters from Great Egg Inlet to Cape May NJ 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; 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 Cape May NJ to Cape Henlopen DE out 20 nm; Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm and 4 more areas |
| Headline | Severe Thunderstorm Watch issued March 16 at 8:23PM EDT until March 17 at 12:00AM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-17T00:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | false |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.001.1","noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.002.1","noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.003.1","noaa_urn:oid:2.49.0.1.840.0.d2d762cc7528bb76cd42ea27934b1f85035e82a6.002.1","noaa_urn:oid:2.49.0.1.840.0.d2d762cc7528bb76cd42ea27934b1f85035e82a6.001.1","noaa_urn:oid:2.49.0.1.840.0.bff1858fc47c67ce7bec0475a51bea43cbc27aba.002.1","noaa_urn:oid:2.49.0.1.840.0.bff1858fc47c67ce7bec0475a51bea43cbc27aba.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 43/100, near Dover (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.