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Dense fog to start Tuesday commute in DC area

D.C.-area commuters on Tuesday morning should plan for expanding dense fog that was brought on by a unique weather setup.

High pressure lodged along the Northeast coast with considerable moisture trapped in the lowest thousand feet of the atmosphere is leading to widespread dense fog developing rapidly across the D.C. region.



Visibility will only range from less than a quarter of a mile to one mile through much of the morning.

Dense Fog Advisories extend across south central Virginia.

Here are a few reminders to help navigate the fog before heading to work or school:

  • Use low-beam headlights for best visibility; never use high beams because they cause too much glare making it more difficult to see the road ahead.
  • Similar to driving in a winter storm, keep plenty of distance between you and the vehicle in front of you to account for sudden stops or changes in traffic patterns.
  • Be very vigilant and follow the lines on the road with your eyes because in many instances it may be the best way to navigate the fog.
  • If you can’t see ahead of you, turn on your hazards and pull into a safe location.

Visibility will improve later Tuesday morning into the afternoon with locations west of D.C. seeing patches of blue sky.

Hot, humid week ahead for DC area with severe storm risk

A dangerous heat wave will grip the D.C. area through Thursday, with highs in the mid to upper 90s and heat index values between 100 and 105. Hot and humid conditions are expected through Thursday, according to the National Weather Service, which said to expect daily thunderstorm chances and a risk of severe thunderstorms. 7News Meteorologist Eileen Whelan told WTOP that most of Tuesday will stay dry, but a few late-day thunderstorms are possible, especially north and east of D.C. as storms drift south from Pennsylvania. Any storm could produce damaging wind gusts and hail, but Whelan reiterated "storm chances are low" on Tuesday. Due to a lack of air conditioning, Parkdale High School in Riverdale, Maryland, closed early at 10:30 a.m. on Tuesday, Prince George's County Public Schools said in a social media post.
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