A flood watch will remain in effect until 8 p.m. Sunday evening in York County.
Precipitation is expected to continue into Monday morning, with rainfall totals of between 1 and 2 inches, the National Weather Service said.
The could prompt flood of small streams and creeks.
On Sunday, the weather service is calling for up to a quarter inch of rain with a high of 46 degrees and wind gusts up to 37 mph.
Sunday night will likely bring more rain, with the heaviest precipitation moving out of the area by 2 a.m.
And temperatures will dip low enough that the weather service now says some snow might be mixed in the precipitation that falls.
If it is, the forecast calls for less than a half of an inch Sunday night and the same amount early Monday morning.
The chance of rain on Monday dips to 30 percent. Monday's high temperature is supposed to be 57 degrees.
Sunshine moves back into the area Tuesday with a high of 64.