A real mixed bag of weather across the United States at the moment with the main features being the bitter cold over central and eastern districts with temperatures in places as much as 25 degrees below average. The outlook for the coming days remains changeable with bitterly cold Arctic air continuing to try and surge south out of Canada at times across central and north-eastern states in particular.
A frontal system extending from the Mid-Atlantic region to the Central Gulf Coast will continue to move south-eastwards during the next day or so to lie across the southern tip of Florida by Friday evening. Meanwhile an area of high pressure is sitting over the Upper Midwest and the Southern High Plains and will move eastwards to lie over the Mid-Atlantic and the Lower Mississippi Valley for the end of the week.
A band of snow will develop along the north-western boundary of the frontal system, affecting parts of the southern Ohio Valley, the Mid-Atlantic and southern New England before heading southeast to reach coastal parts of Virginia by Thursday evening. At the same time freezing rain and sleet could affect parts of the Lower Mississippi Valley and the Tennessee Valley before making is way across to the southern Mid-Atlantic Coast by Thursday evening. Further south and west outbreaks of rain will develop over parts of the central and western Gulf Coast, arriving across the Southeast Coast by Thursday afternoon. Outbreaks of mostly light rain will linger over the Southeast Coast and Florida on Friday.
High pressure over the western United States will dominate for the end of the week, but a frontal system over central Canada will move south to bring some snow over parts of the Upper Mississippi Valley, the Northern Plains and parts of the Upper Great Lakes on Friday.