From the ABC 7 Weather team

Washington, D.C. Weather Forecast: Day 2 of the Heat Wave, 2 More to Go

June 17, 2014 - 09:10 AM
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Humidity is higher and Dulles Record High Temperature in Jeopardy.

This Afternoon:
Mostly Sunny
Highs: Low to Mid 90s
Heat Index: 94-98
Evening Thunderstorm, Partly Cloudy
Lows: Low 70s
Precipitation: 25%
Mostly Sunny, HOT
Highs: Mid 90s
Heat Index: Near 100

Record high temperatures may be broken today and tomorrow as the heat continues in the Mid-Atlantic.  The Bermuda High is parked offshore and keeps the heat and humidity pumping into the region.  The forecast high today in D.C. is 93 degrees, just a few shy of the record in 1991 of 95 degrees.  The record at Dulles is 92, so that is more likely to be beat. 

Forecast High Temperatures Tuesday

Winds become more Westerly on Wednesday and that will force air down the mountains and heat up.  So, we predict the peak of the heatwave is tomorrow with highs in the mid 90s.  A cold front will move into northern Maryland late Wednesday or Thursday and stall.  This will bring better chances of thunderstorms for late week, while chances today and Wednesday are small, only 1 in 4.  With the high temperatures and a rather stagnant airmass, air quality is a concern.  Yesterday was the first day D.C. reached "code orange" and that remains the forecast for today and Wednesday. It means people with respiratory issues in addition to the very young and very old should limit outdoor exposure and activity, especially between 3p and 7p.  More it today's blog.



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