Western Loudoun storm history

Snowfall amounts of 0.5 to 1.5 inches and ice accumulations of up to 0.20 inches were observed across western Loudoun County, mainly across the higher elevations. There was one direct fatality when a 52-year old woman in northeastern Loudoun County was killed from a falling branc…

A mesonet in Lovettsville, VA measured a peak wind gust of 63 mph at 1538LST.

Coldest apparent temperatures/wind chills overnight into morning hours.

Numerous mesonets in Western Loudoun County measured heat indices in excess of 110F.

Loudoun County 911 center received more than two dozen reports of trees and power lines downed by the strong gradient winds across the county.

Heat indices rose to between 105 and 110 degrees.

Heat indices rose to between 105 and 110 degrees.

Light winds and plenty of low level moisture allowed areas of dense fog to form before dawn. The fog dissipated shortly after sunrise.

Canadian high pressure, clear skies and light winds allowed widespread freezing temperatures to occur late at night and early in the morning.

Light winds and plentiful low level moisture allowed areas of dense fog to form late on the 24th. The fog dissipated just after dawn on the 25th.

Light winds and excessive low level moisture allowed areas of dense fog to form during the evening of the 28th. The fog dissipated before dawn on the 1st.

Wintry precipitation continued at times into February 2nd.

Light winds and residual moisture allowed fog to develop in the evening of January 26th. The fog dissipated early on January 27th.

Dense fog developed early in the morning, with widespread visibility of 1/4 mile or below. Fog dissipated towards noon.

Visibility dropped to 1/4 mile for several hours.

Canadian high pressure allowed temperatures to drop to freezing or below, ending the 2020 growing season.

Areas of dense fog developed across the region after midnight on the 23rd, with widespread visibility below 1/4 mile. The fog dissipated by 10 AM.