Icing of the Delaware
In some places, river almost entirely covered with drift ice.
Despite the ever-growing power of the February sun, ice continues to build on the region's waterways and that is likely to continue into the weekend, thanks to one of the harshest late-season cold outbreaks in the period of record.
So far, no major navigation problems have been reported, but the U.S. Coast Guard is restricting traffic north of the Betsy Ross Bridge to steel-hulled vessels, said spokesman Lt. Nick Woessner.
Woessner said while the river is covered with "a good amount, it's all drift ice," as opposed to packed.
Another concern for navigation is the potential for blowout tides, said Ray Kruzdlo, hydrologist at the National Weather Service office in Mount Holly.
In addition, ice jamming could be a flooding factor during the weekend if rains arrive as predicted on Sunday.
Jamming is occurring near Washington's Crossing, and even though river levels are low, jams can result in unpredictable flooding as water gets backed up and sloshes over river banks.
Said Kruzdlo, "It's on our radar."