After a cloudy start, there will be a gradual clearing for St. Patrick's Day in Williamsport and the vicinity with a high temperature near 35 degrees, according to the National Weather Service in State College.
Tonight should be clear with a low about 20 degrees and mostly sunny skies with a high of 41 is forecast for Tuesday.
After that, however, things take a turn for Tuesday night and Wednesday with a slight chance of freezing rain and low of 29 overnight Tuesday and a 60 percent chance of freezing rain before 1 p.m. Wednesday before it turns over to all rain through the rest of the day and night.
DAVE KENNEDY/Sun-Gazette Correspondent
The Hughesville High School Marching Band makes its way down West Fourth Street on Saturday during the third annual St. Patrick’s Day Parade in Williamsport.
With the arrival of spring at 12:57 p.m., Thursday should be partly sunny with a high of near 50 and Friday should be mostly sunny with a high of 51. Overnight lows Thursday and Friday will be in the low to mid 30s.
A chance of showers with a high near 50 is forecast for Saturday and after an overnight low of 26, Sunday should be partly sunny with a high near 43.
Below Williamsport, another winter storm was headed for southern Pennsylvania late Sunday, following several days of warm weather that gave people hope spring is on the way.
Forecasters were predicting light snow along the Pennsylvania-Maryland line, perhaps as much as 3 inches, with lesser amounts up to the Pennsylvania Turnpike and trace snowfall farther north.
Officials were not expecting flooding from the large front that was moving into Pennsylvania from the southwest. Much heavier snow was predicted for Maryland and Virginia.
Chiropractor Ed Antolick, of Camp Hill, finished up a 6-mile run at City Island on the Susquehanna River early Sunday morning, with the temperature hovering around 30 degrees.
"You've got to take advantage of a sunny day, even if it's a little chilly," Antolick said.
Ricardo Contreras, an upholsterer from Harrisburg, said he was tired of the winter and had no plans to shovel whatever might fall overnight.
"I'll just let it melt by itself," Contreras said.
Engineer Bill Bingham, heading into the West Shore Plaza in Lemoyne for Sunday breakfast, said he was most looking forward to playing some golf for the first time in many months.
"I really like the winter, but I'm done with the snow now," Bingham said. "I'm ready for spring."
Unseasonably cold air was expected to remain in place for several days. Thursday is the first day of spring.