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Somerset County Public Safety
Tuesday July 21st, 2026 :: 03:14 p.m. EDT

Advisory

Flash Flood Warning until 07:15PM

FFWPHI The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for... Southeastern Morris County in northern New Jersey... North Central Somerset County in northern New Jersey...

* Until 715 PM EDT.

* At 313 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has 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. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas.

* Some locations that may experience flash flooding include... Morristown, Madison, Florham Park, East Hanover, Morris Plains, Mendham, Peapack And Gladstone, Far Hills, Bernardsville and Hanover Township. This includes the following highways... Interstate 287 in New Jersey between mile markers 31 and 41. Interstate 80 in New Jersey between mile markers 45 and 48.

* AFFECTED AREAS: MORRIS, NJ ... SOMERSET, NJ

Instructions:

Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Address/Location
Somerset County Public Safety
20 Grove St
Somerville, NJ 08876

Contact
Emergency: 9-1-1
Non-emergencies: 908-231-7140

Alert Details

Severity:
Severe - Significant threat to life or property
Urgency:
Immediate - Responsive action SHOULD be taken immediately
Certainty:
Likely (p > ~50%)
Category:
Meteorological (inc. flood)
Event:
Flash Flood Warning

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