An initial burst of precipitation this morning will produce sleet in parts of the DC metro region; especially, across northern sections, as low-level temperatures have resulted in a corridor favoring this form of precipitation. Other areas will see some light rain that can freeze on untreated surfaces over the next few hours; especially, in higher elevation locations. The precipitation will then tend to slacken off or even stop completely during the mid-day and early afternoon hours and then should resume during the mid-to-late afternoon hours. By that time, the precipitation should fall mainly as liquid; however, there still can be some freezing on untreated surfaces; especially, across the northern and western suburbs of the metro region.
Temperatures at 8am ranged from 32 degrees in Gaithersburg, 34 at College Park to 36 at Reagan Airport. Do not be surprised to see the temperature drop a couple of degrees during the onset of this initial burst of precipitation. Also, be careful early tonight right after sunset as temperatures could drop a couple degrees and that could be significant in some sections (i.e., right around the freezing mark). The latest hourly loop of a high-resolution computer forecast model (HRRR) shows the two waves of precipitation for the DC metro region from now into tonight.
Meteorologist Paul Dorian