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Somerset County Public Safety
Sunday September 27th, 2026 :: 03:29 p.m. EDT

Advisory

Flood Warning until 08:00AM Tuesday

...The National Weather Service in Mount Holly has issued a Flood Warning for the following rivers in New Jersey... Millstone River At Blackwells Mills affecting Somerset County. For the Millstone River...including Blackwells Mills...Minor flooding is forecast.

* WHAT...Minor flooding is forecast.

* WHERE...Millstone River at Blackwells Mills.

* WHEN...From late tonight to Tuesday morning.

* IMPACTS...At 10.0 feet, The D&R Canal is flooded by the Millstone River.

* ADDITIONAL DETAILS... - At 2:15 PM EDT Sunday the stage was 5.8 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 9.7 feet early tomorrow afternoon. It will then fall below flood stage early Tuesday morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 9.7 feet on 05/11/1998. - http://www.weather.gov/safety/flood

* AFFECTED AREAS: SOMERSET, NJ

Instructions:

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. The next statement will be issued late tonight by 330 AM EDT.

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:
Expected - Responsive action SHOULD be taken soon (within next hour)
Certainty:
Likely (p > ~50%)
Category:
Meteorological (inc. flood)
Event:
Flood Warning

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