This alert expired on 28 August 2026 at 19:15 UTC. It is kept here as a record.
It is the 4th strongest of the 237 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 28 at 2:44PM EDT until August 28 at 3:15PM EDT by NWS Mount Holly NJ
An estimated 333,809 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 17, 2026 · score 43 · 6.0 km
- July 29, 2026 · score 43 · 7.9 km
- July 21, 2026 · score 67 · 8.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % 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) | 43 / 100 |
| Our confidence | 85% |
| Coordinates | 39.7433, -74.1708 |
| Nearest City | Ocean Acres (9 km) |
| Population Exposed | 333.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T18:44:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ocean, NJ |
| Headline | Severe Thunderstorm Warning issued August 28 at 2:44PM EDT until August 28 at 3:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-28T15:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.34 |
| Iem Unit | Inch |
| Iem City | 1 NNE Holgate |
| Iem County | Ocean |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Mesonet station EW4321 Beach Haven. |
| MergedSources | [{"id":"iem_R_39.540_-74.260_1787939760000","source":"iem","severity":"low","severityValue":25,"timestamp":1787939760000,"latitude":39.54,"longitude":-74.26}] |
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 43/100, near Ocean Acres (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.