This evening the front will barrel through the D.C. region. We won’t have snow and we won’t have a 30 degree drop in temperatures. But, by tomorrow, it will be some 15-20 degrees colder, with highs struggling to reach the mid-40s. And when you factor in the wind, sustained at 15-25 mph, gusting to 30-35 mph, it will feel another 10 degrees colder than that.
The combination of wind, dry air, and lack of precipitation even poses a wildfire threat in open areas says the National Weather Service:
THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND LOW FUEL MOISTURE WILL ENHANCE THE THREAT FOR THE SPREAD OF WILDFIRES SATURDAY.
Winds will settle some Saturday night, but with clear skies and the cold air mass in place, it will be the most bitter evening of the season thus far. Lows everywhere will drop into the 20s. Reagan National airport should log its first official freeze of the cold season.