Elevated North America

NWS / NOAA weather: Flash Flood Warning issued August 20 at 6:26PM EDT until August 20 at 10:30PM EDT by NWS Mount Holly NJ

FFWPHI

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
Mercer County in central New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
East Central Montgomery County in southeastern Pennsylvania...
Northeastern Philadelphia County in southeastern Pennsylvania...

* Until 1030 PM EDT.

* At 626 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 0.5 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Philadelphia, Trenton, Bensalem, Ewing, Princeton, Burlington,
Bristol, Hatboro, Pennington, Beverly, Rockledge and New Hope.

Severity
Severe (4/5) · CAP Severe
This month
1420th Weather alert at severity 4+ in the last 30 days
Source: NWS / NOAA weather

Understanding Global Threats

Browse All Topics & Pages

Complete sitemap with all intelligence resources

View Sitemap →

Related Preparedness Gear

Be prepared for evolving situations

Global Conflict Map

Live snapshot of conflict locations and tension zones worldwide.

Last update on: August 20, 2026

Keep Exploring