Wednesday will begin with fog and an air quality alert in York and could end with some showers.

York is under an orange air quality alert for the second day on Wednesday. The alert from the state Department of Environmental Protection is for the Susquehanna Valley and means that air pollution concentrations could become unhealthy for sensitive groups, including children and seniors and people with asthma or other lung diseases or heart disease. People in those groups are urged to avoid strenuous activity or exercise outside.

The area will have patchy fog until around 9 a.m., and the day will be cloudy, with a high of 53 and low of 47, according to the National Weather Service.

A chance of showers Wednesday night turns into a 50 percent chance of rain Thursday. The day will be cloudy, with a high of 63 and low of 54, the forecast said.

Rain is likely Friday, with a high of 56, and the rain will change to a mix of rain and snow Friday night, with a low of 33, the NWS said.

Saturday will be partly sunny and colder, with a high of 40 and low of 25, the forecast said.

Sunday has a chance of snow during the day, and snow, sleet and freezing rain are likely Sunday night, the service said. Sunday's high will be 35 and the low 32.

Monday has a chance of rain, with a high of 42 and low of 28, the forecast said.