A mix of sleet, freezing rain and plain rain is expected in the Washington region Wednesday night into Thursday morning and is leading to school delays and may even prompt some closings. The iciness could also affect federal government operations.

With a quick-moving weather system expected to blanket Massachusetts with snow Thursday — with most areas seeing between 2 and 4 inches — some schools have already decided to close or delay opening. National Weather Service forecasters Wednesday set down a Winter Weather Advisory covering almost the entire state,

Thursday's storm is expected to drop a few inches of snow, followed by an icy mix that could make travel slippery.