Mercer County Under Flash Flood Watch

At 2:48 p.m. today, Nov. 22, the National Weather Service issued the following Flash Flood Watch for Mercer County and the surrounding area.

The National Weather Service in Mount Holly has issued a Flash Flood Watch from 10 p.m. this evening through Wednesday afternoon for portions of New Jersey and Pennsylvania, including the following areas:

• In New Jersey: Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and Warren
• In Pennsylvania: Berks, Bucks, Chester, Delaware, Lehigh, Montgomery, Northampton and Philadelphia

 

A complex low pressure system will move from the Ohio Valley into our region later tonight and produce a copious amount of rain over a rather short time period. Rain will be heavy at times tonight and early Wednesday morning as the system wraps up and moves to our northeast.

Widespread rainfall amounts of one to three inches are possible in the watch area through Wednesday afternoon with even higher amounts from isolated thunderstorms.

Impacts from flooding will include small stream, poor drainage, urban area, basement and roadway flooding. The larger rivers should be able to take the excessive rainfall amounts but they may run high and a few may possibly approach flood stage.

Precautionary/preparedness actions: A flash flood watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should flash flood warnings be issued.