People across parts of Alabama woke up Friday morning to snow blanketing their streets and police warning of impassable roads. The winter storm forecasters have warned of through the week from Huntsville to Birmingham began sometime over night.

At least 46 million people were under a winter storm warning as of Thursday as the storm spreads along the Gulf Coast Friday, according to the weather service. The storm should weaken by Saturday, bringing lighter snow between 1 and 3 inches to parts of the Northeast, the Mid-Atlantic and the Ohio Valley before exiting off the Carolinas.

Computer models are coming into reasonable agreement that the D.C. area will see snow Friday night into early Saturday. This won’t be a big a storm, but up to a couple of inches could fall in parts of the region.

A National Weather Service forecast predicted up to an inch of snow in Columbia, but it appears to be receiving a more significant total.