The National Weather Service has issued a winter storm watch for Middlesex County, including Watertown.
The storm, which may stretch from Saturday afternoon into Sunday morning, could dump two to five inches of snow in areas north and west of Boston.
NWS predicted the storm will be a mix of rain and snow. Leaves on the trees coupled with heavy wet snow may cause branches to break with power outages possible.
NWS is also predicting strong northeast winds.
“The potential for heavy impact with this early season winter storm is possible. Heavy wet snow could cause hazardous driving conditions as well as widespread power outages,” reported the NWS.