This alert expired on 6 July 2026 at 03:23 UTC. It is kept here as a record.
It is the 3rd strongest of the 259 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 11:13PM EDT until July 5 at 11:15PM EDT by NWS Mount Holly NJ
An estimated 3,036,320 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 17, 2026 · score 52 · 3.0 km
- August 5, 2026 · score 46 · 5.4 km
- July 21, 2026 · score 46 · 7.2 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % 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) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 39.7500, -75.5271 |
| Nearest City | Wilmington (2 km) |
| Population Exposed | 3.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T03:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f5d5c0c444f101373a129fbad82688f7f5badeef.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kent, DE; New Castle, DE; Cumberland, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA |
| Headline | Severe Thunderstorm Warning issued July 5 at 11:13PM EDT until July 5 at 11:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-05T23:23:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 1 N Perryville |
| Iem County | Cecil |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Report from mPING: Dime (0.75 in.). |
| MergedSources | [{"id":"iem_D_39.520_-76.160_1783301340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783301340000,"latitude":39.52,"longitude":-76.16},{"id":"iem_F_40.030_-76.320_1783301100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783301100000,"latitude":40.03,"longitude":-76.32},{"id":"iem_H_39.570_-76.070_1783303620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783303620000,"latitude":39.57,"longitude":-76.07}] |
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 52/100, near Wilmington (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.