Subscribe The National Weather Service has now issued a winter storm warning for seven New Jersey counties, saying heavy snow mixed with ice will create a mess on local roads and highways. The rest of North and Central Jersey is under a winter storm watch. A winter storm warning was issued in these counties: Sussex, Morris, Somerset, Middlesex, Mercer, Warren and Hunterdon. Subscribe The NWS issued snow estimates for each region of New Jersey: Here is what to expect from the storm that's expected to impact the region between 7 a.m. Wednesday and 7 a.m. Thursday: Heavy snow, mixed precipitation, and rain will affect the region. Snow amounts will be significant near and north of the I-95 corridor.