The National Weather Service (NWS) in State College on Thursday issued a flood watch for a portion of central Pennsylvania, including Northumberland County, until 7 p.m. Saturday.
Rainfall up to 1.5 inches and the potential for ice jams has led to flooding concerns.
According to the NWS, ice covering streams and rivers has the potential to partially melt and break up due to the force of the rising water from the heavy rain. Chunks of ice could lead to ice-jam flooding if they collect at constriction points. Ice jams could clog the flow and back up water onto land.
A period of intermittent rain was forecast to begin Thursday evening and last throughout this afternoon, then change into a wintery mix and eventually to snow late tonight and Saturday morning.
The high temperature Thursday at Selinsgrove, the nearest NWS official reporting station, was 56 degrees at 9 p.m. — a stark contrast from last weekend when highs struggled to break the teens.
A high of 61 degrees is forecast for today, but the warmer weather will be short lived as colder air returns to the region for Saturday. Highs in the mid-20s will persist into next week.