Cold air damming wedge will keep things overcast and chilly today
The dreaded cold air damming wedge is back in full force today (Sunday), keeping things moist, overcast, and chilly even after this morning’s fog slowly melts away. I’ve added the crudely drawn red line to this short range model depiction for this afternoon’s surface conditions to illustrate where the boundary is:
In Virginia the wedge will reach down south of the I-64 corridor, with easterly winds, low overcast, and chilly temperatures north of the front. Today’s high temperature will be in the low 50′s (F) for the ‘Burg. In fact, this morning’s NWS Sterling forecast discussion mentions “raw conditions” which seems an apt description.
As I mentioned in Friday’s post the low overcast could render some of today’s Battle of Fredericksburg activities louder than anticipated given any musketry or artillery fire. The low clouds tend to trap sound waves underneath them. The good news is that a surface low pressure and cold front approaching from the west will help force this wedge back northward tonight, allowing temperatures Monday to climb back into the 60′s ahead of the cold air that will settle in the area behind this next front.
Meanwhile, if you’re planning to be out and about today plan for “raw” conditions and dress accordingly.