For Thursday night into Friday, some accumulating snow is expected with the highest amounts in the Lehigh Valley/Berks County, northwestern New Jersey and the Poconos. Hazardous travel is possible and this may have a higher impact on the Friday morning commute.

For Saturday and Sunday, a significant winter storm is probable, according to the National Weather Service, however the details including precipitation types and impacts are less certain at this time. A flash freeze is possible Sunday afternoon and night as arctic air pours into the area.

Here’s the local forecast:

Today: Mostly sunny, with a high near 36. Northwest wind 3 to 6 mph.

Tonight: Partly cloudy, with a low around 22. West wind 3 to 5 mph.

Wednesday: Partly sunny, with a high near 37. West wind 7 to 10 mph.

Wednesday Night: Partly cloudy, with a low around 19. North wind 5 to 8 mph.

Thursday: A slight chance of snow after 4 p.m. Partly sunny, with a high near 29. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.

Thursday Night: Snow, mainly after 7 p.m. Low around 25. Chance of precipitation is 90%.

Friday: A chance of snow showers before 10 a.m. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.

Friday Night: Mostly cloudy, with a low around 23.

Saturday: Snow likely after 1 p.m. Mostly cloudy, with a high near 32. Chance of precipitation is 60%.

Saturday Night: Snow before 10 p.m., then freezing rain and sleet. Low around 24. Chance of precipitation is 90%.

Sunday: Snow, freezing rain, and sleet likely. Cloudy, with a high near 30. Chance of precipitation is 60%.

Sunday Night: A chance of snow. Mostly cloudy, with a low around 7. Chance of precipitation is 30%.

M.L. King Day: Mostly sunny, with a high near 19.