Lubbock and much of the South Plains are under a winter weather advisory through 6 a.m. Friday, with additional snow accumulations of an inch or less and winds gusting as high as 40 mph expected, according to the National Weather Service in Lubbock.

Wichita Falls ISD, other school districts and Midwestern State University have announced closings or delayed start times for Friday. Note that districts often change their original plans on short notice due to weather concerns. Chillicothe ISD: Two hour delayed start.

Poor conditions on secondary roads in some portions of the D.C. region and worries about refreezing has prompted another round of school delays and closings for Friday — with many students having missed an entire week of classes.

UPDATE: As of 10:45 a.m., 50 districts have now closed. Only seven districts stayed with a two-hour delay. EARLIER: Some schools made announcements about Thursday morning delays as early as Wednesday evening due to the weather.

The warning says the heaviest snow is expected between noon and 3 p.m., with the northeast Panhandles' heaviest snowfall around 3-9 p.m.

Several schools will remain closed Thursday across Greater Cincinnati due to the extremely cold temperatures and impacts from winter weather.