From the ABC 7 Weather team

D.C. Weather Forecast: Reagan hit 100 degrees again today

July 17, 2012 - 03:30 PM
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For the 6th time this year, Reagan National has reached the 100 degree mark.

Tonight: Mostly Clear and Warm

Lows: 70s | Wind: SW 3-5 m.p.h.

Wednesday: Partly Cloudy, Hot and Humid, PM Storms

Highs: Near 100 | Precipitation: 30%

Thursday: Mostly Cloudy, Showers and Storms Likely

Highs: Low 90s | Precipitation: 60%

A HEAT ADVISORY is in effect from 11 am until 9 pm tomorrow

High pressure has pushed the temperature to 100 degrees in Washington this afternoon. Fortunately, humidity levels are only adding a couple degrees to the Heat Index…more humid conditions are likely tomorrow. High pressure has also suppressed thunderstorm development across the region. HOWEVER… as a cold front slowly approaches the area tomorrow afternoon and evening, the chances of thunderstorms will increase. Temperatures will once again reach the upper 90s but increasing humidity levels will make it feel close to 105 degrees at times.

On Thursday, the cold front will continue its slow movement through the mid- Atlantic keeping high chances for more scattered thunderstorms. Although it will turn somewhat cooler on Friday, enough instability will remain in the atmosphere combined with intense mid -July sunshine to trigger more afternoon thunderstorms.

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