Macopin, New Jersey – Prolonged cold temperatures across northern New Jersey are increasing river ice coverage, raising concerns for ice jams and localized flooding near roadways and bridges along the Pequannock River.
According to the National Weather Service Middle Atlantic River Forecast Center, very cold and dry conditions will remain the dominant weather pattern for the next few days. As temperatures stay below freezing, river ice is expected to continue developing and thickening across the region.
MARFC officials note that expanding ice can lead to ice jams, where broken ice accumulates and restricts river flow. These jams can cause rapid water level rises upstream, potentially resulting in minor flooding near low-lying areas, bridges, and roads such as Route 23 and nearby local crossings.
While no major flooding is currently forecast, residents living near rivers and streams are encouraged to prepare for changing conditions. Ice jams can shift suddenly, sometimes releasing without warning and sending water levels up or down quickly.
In addition to flood concerns, officials warn that cracking and shifting river ice can produce loud booming or grinding noises, especially overnight. These sounds may disrupt sleep for residents near the river but are a normal result of ice expansion and movement during extreme cold.
Commuters traveling near river-adjacent roadways should remain alert for water encroaching onto roads, particularly during overnight and early morning hours when ice movement is more likely.
This alert may be especially relevant for residents, commuters, and outdoor workers in riverfront areas who rely on nearby roadways for daily travel.
The National Weather Service advises residents to avoid walking on frozen rivers, monitor local water levels, and stay informed through official MARFC and local NWS updates as the cold pattern continues.
