The federal government is opening two hours late today; employees may also take unscheduled leave, according to OPM. Other than that, it’s pretty much business as usual in DC. However, the city snow emergency is still in effect, so remember those parking restrictions. Metrorail is open at all 86 DC metro-area stations.
However, be careful to watch for icy patches on sidewalks and streets. It’s called black ice because it is transparent and takes on the color of the surface beneath it. So, on black pavement, it looks like… black pavement. It is often impossible to see–you only realize it’s there when you slip and loose your footing.