An approaching arctic front will bring precipitation to central MD tomorrow afternoon and evening that will likely have an impact on roads tomorrow evening and possible Wednesday morning. Presently, a mix of rain and snow is expected to develop across the 95 corridor during the early afternoon on Tuesday, and then change to all snow around sunset as temperatures fall below freezing. If that is how things play out, once temperatures get below freezing, untreated surfaces will rapidly ice over. Based on recent model runs, I think the current forecasts look pretty good with a coating – 2″ of snow south of I-70, and 3 – 4″ to the north where less mixing is expected. However, the main travel concerns are not the amount of snow that falls, but rather the possible relatively fast icing that may occur with the falling temperatures. Of course, a couple of degrees in either direction would make a big difference on overall impacts, so this will probably be a nowcast event.
I’ll update later this evening or early tomorrow morning with current trends, but for now expect possible travel problems tomorrow evening into Wednesday morning. After this system crosses the area, blustery and very cold conditions are expected for the remainder of the work week.
The Weather Mill 