From the ABC 7 Weather team

Washington D.C. Forecast: Labor Day weekend heat and humidity

August 30, 2013 - 11:05 PM
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High heat and humidity will be around this weekend as well as the chance for daily afternoon storms.

Tonight:
Mostly Clear, Warm
Lows: Around 70
Wind: S 4-8 m.p.h.
Saturday:
Partly Cloudy, Iso. PM Storms
Highs: Upper 80s
Precipitation: 30%
Sunday:
Partly Cloudy, PM Storms Possible
Highs: Around 90
Precipitation: 40%

High pressure over the mid-Atlantic states produced a beautiful day across the region. Skies will remain partly cloudy through tonight with comfortable evening temperatures…just about ideal for any outdoor activities. That high pressure center will moves over the Western Atlantic tomorrow and will direct warmer and more humid air across our area. It is going to be very warm and muggy throughout the Labor Day Weekend.

The biggest questions regarding the weekend forecast are the probability and timing of thunderstorms. An upper level disturbance will provide a slight chance for afternoon thunderstorms on Saturday. Increasing instability and lift in the atmosphere will produce slightly higher chances of thunderstorms on Sunday afternoon. Then on Monday, a cold front will approach later in the afternoon, This will produce a likelihood of thunderstorms across many parts of the area. Cooler and drier air will arrive for the middle of next week.

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