This alert expired on 12 March 2026 at 01:15 UTC. It is kept here as a record.
It is the 44th strongest of the 216 detections recorded within 20 km of this point since 11 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 11 at 7:47PM EDT until March 11 at 9:15PM EDT by NWS Mount Holly NJ
An estimated 521,043 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 12, 2026 · score 48 · 0.0 km
- June 10, 2026 · score 41 · 1.6 km
- June 27, 2026 · score 43 · 3.9 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 48 / 100 |
| Our confidence | 88% |
| Coordinates | 39.4543, -75.4129 |
| Nearest City | Bridgeton (16 km) |
| Population Exposed | 521.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-11T23:47:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_c5d284c56cee4650fb71c4af8e4b70f1eebcbc21_001_1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Delaware Bay waters north of East Point NJ to Slaughter Beach DE |
| Headline | Special Marine Warning issued March 11 at 7:47PM EDT until March 11 at 9:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-11T21:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 SE North East |
| Spc County | Cecil |
| Spc State | MD |
| Spc Comments | Two trees down on Irishtown Road and two trees down on Frenchtown Road. (LWX) |
| Iem TypeSummary | D |
| Iem City | 2 SE North East |
| Iem County | Cecil |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Two trees down on Irishtown Road and two trees down on Frenchtown Road. |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 48/100, near Bridgeton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.