TONIGHT: Mostly Clear & Cold. Lo 23.

WEDNESDAY: Mostly Sunny, Chilly. Hi 39.

THURSDAY: AM Icy Mix, PM Transition to Rain South/Icy Mix North. Hi 38.

Today has featured cold air and temperatures in the 30s despite all day sunshine. Clear and calm conditions persist overnight with lows dropping to the low 20s. We start with sunshine and should nearly finish our Wednesday with blue sky, however clouds increase heading into Wednesday evening. A wintry mix then develops overnight Wednesday into Thursday heading into Central PA before sunrise.

At this time, an icy mix looks to develop overnight Wednesday into the pre-dawn hours of Thursday. A period of snow and sleet is likely for the entire region to start Thursday, followed by a slow transition to freezing rain and eventually plain rain. The key will be temperatures and how long it takes to overcome this cold air at the surface. The column of air above us should warm up more quickly, leading to the transition to icy precipitation types first. Eventually, at some point in the afternoon, most of Central PA should be seeing rain as temperatures rise above 32°. There will continue to be pockets of freezing rain, however, well into the afternoon, especially for northern spots.

The greatest travel impacts from this storm will be Thursday morning when we still have enough cold air established across the area. This will likely lead to slick and icy spots, especially on sidewalks and secondary roads. As milder air nudges northward, a change from an icy mix to rain is expected later in the afternoon and evening, with improving travel conditions expected. A period of wet snow and sleet *could* redevelop north and west of Harrisburg during the evening hours and Thursday night. This is still an evolving part of the forecast.

As the storm exits Friday morning and the rain wraps up, much colder air and a steady breeze return for the weekend. This pattern will bring several more chances for wintry weather as we get closer to the holidays. As always, we’ll stay on top of it and explain it right here…so bookmark this page and let it be your source for local weather. In the meantime, enjoy the sunshine everybody…for now!

-Meteorologists Eric Finkenbinder and Dan Tomaso