Latest Forecast

A large and pronounced trough, or dip in the Jet Stream, will settle over eastern North America this week. As a result, residents of northern MD, southeastern PA and the Lower Susquehanna Valley will face dangerously cold conditions through Wednesday. A Cold Weather Advisory is in effect from 7 PM this evening to 12 PM Wednesday. West-northwesterly winds of 10-20 mph with gusts up to 30 mph will accompany highs in the low-to-mid 20s this afternoon. Motorists should be alert for blowing and drifting snow, as well as icy roadways, and avoid all unnecessary travel. Winds will subside this evening and remain relatively light on Tuesday and Wednesday, but high temperatures will be 20-25 degrees below average and only in the teens. Low temperatures should bottom out near 0 degrees tonight and may end up a couple degrees lower Tuesday night. Not since January 31, 2019, has the mercury fallen below 0 degrees at Millersville University, but that may change tomorrow night. Despite light winds, wind chills will be dangerously low from tonight through early Thursday morning. Minimum wind chills of 10-15 degrees below zero are expected early Tuesday and Wednesday mornings, and they'll only be in the single digits above zero each afternoon. With temperatures and wind chills so low, frostbite can develop within just 20-30 minutes. Thus, it will be imperative to limit time outdoors over the next 72 hours. If you must go outside, dress in layers and cover exposed skin to prevent frostbite or hypothermia. In addition, leave faucets dripping slightly to prevent pipes from freezing or bursting.