Will this be the coldest the region has been since May?
A few showers will continue to push through the D.C. area this evening as a cold front passes overhead. As of 4pm, the 24 hour temperature change was down 17 degrees at Reagan National from 4pm yesterday, down 24 degrees at Dulles Airport, and down 26 degrees in Frederick. This is the first strong fall cold front of the season and it should bring in the coldest temperatures since early May.
Morning lows should hang around the 50 degree mark in the city, but in the suburbs, widespread 40s should be reached. There is even the chance for a few pockets of 30s in the higher elevations of the mountains. For a perspective on how strong of a cold front this is, let's look at International Falls, Minnesota for a second. The temperature dipped to 19 degrees there, which is the first time it has been in the teens in the month of September in Minnesota in recorded history. That's some cold air this early!
So what's on tap for the next couple of days? Depending on how you look at it, you are either excited for the change or are absolutely dreading the changes to come. Highs Friday should only manage to reach the upper 60s. There should be a nice start to the day but more of a cloudy end. Definitely bring a jacket for the morning hours.
The weekend ahead will feature high pressure to the northeast. Usually, high pressure is our friend bringing fair skies, light winds and pleasant conditions. When it's in that position though, Cold Air Damming can sometimes result, and that's what we think will occur Saturday and Sunday. Northeasterly winds will bring an influence from the Atlantic over the region which will help add clouds and keep cooler temperatures. Highs should remain in the upper 60s Saturday and near 70 Sunday.