mediumSevere weatherCalamity Score: 37

Severe Weather near Newark

2 September 2026 · 02:28 UTCChester United StatesNOAA

This alert expired on 2 September 2026 at 04:45 UTC. It is kept here as a record.

It is the 90th strongest of the 165 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: Flash Flood Warning issued September 1 at 10:28PM EDT until September 2 at 12:45AM EDT by NWS Mount Holly NJ

An estimated 336,643 people live within 50 km of this point.

Nearby, since 12 March 2026

August 28, 2026 · score 43 · 4.5 km
August 27, 2026 · score 43 · 4.5 km
June 15, 2026 · score 43 · 5.9 km

How we know

Confirmed by 2 independent sources, including NOAA.

Our own score for this event is 37 out of 100, at 86 % 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)	37 / 100
Our confidence	86%
Coordinates	39.8405, -75.9048
Nearest City	Newark (22 km)
Population Exposed	336.6K within 50 km
Impact Tier	significant
Timestamp	2026-09-02T02:28:00.000Z
Source	https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.4f0a7383ad561a8b8347ed60ee1c41720d8d3c8b.001.1

Score Breakdown

intensity

population

cascading

historical

Technical Details

Event	Flash Flood Warning
Urgency	Immediate
Certainty	Likely
AreaDesc	New Castle, DE; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA
Headline	Flash Flood Warning issued September 1 at 10:28PM EDT until September 2 at 12:45AM EDT by NWS Mount Holly NJ
Expires	2026-09-02T00:45:00-04:00
SenderName	NWS Mount Holly NJ
HasExactCoords	true
Spc ReportType	wind
Spc Speed	UNK
Spc Location	1 WSW Woodbury Heights
Spc County	Gloucester
Spc State	NJ
Spc Comments	Multiple pictures of trees uprooted in Greenfield Heights section of West Deptford. Time estimated. (PHI)
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spc","severity":"medium","severityValue":45,"timestamp":1788310680000,"latitude":39.73,"longitude":-75.21},{"id":"spc_wind_39.79_-75.17_77","source":"spc","severity":"medium","severityValue":45,"timestamp":1788310680000,"latitude":39.79,"longitude":-75.17},{"id":"spc_wind_39.79_-75.17_78","source":"spc","severity":"medium","severityValue":45,"timestamp":1788310860000,"latitude":39.79,"longitude":-75.17},{"id":"spc_wind_39.81_-75.17_79","source":"spc","severity":"medium","severityValue":45,"timestamp":1788310860000,"latitude":39.81,"longitude":-75.17}]

Safety Information

During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.

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.

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Calamity.live data shows a weather event with CalamityScore 37/100, near Newark (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.