From the ABC 7 Weather team

D.C. Weather: Record challenging heat today but relief is not far off

July 26, 2012 - 10:31 AM
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The heat and humidity are back along with chances for some isolated strong to severe storms.  When can we expect cooler air to return?

Within 24 hours, our weather has done a complete 180. In one day, we're going from blue skies, low humidity and seasonable highs in the upper 80s to humid and perhaps record-challenging heat.

What happened?

In short, a warm front lifted north through the region overnight, putting us back in the sticky, hot, and unstable air.

Our forecast for Thursday has us topping out around 100 degrees, which puts our area records in jeopardy of being tied or even broken. The record that has the best shot of being broken, in my opinion, would be Dulles with a record high of 98.

BWI Marshall also has a pretty good chance reaching or exceeding the current record of 101, but Reagan National will be the hardest to break or tie, with 103 degrees the current record high.

Even though clouds blocked sunshine in many places this mornng records are still within reach. Given that we are going to see plenty of sunshine during the peak heating of the day, I am not going to rule out the possibility that all records could potentially fall Thursday.

Record highs aside, if we reach the 100 degree mark, it will be the 8th time we have done that in 2012. If you are hoping for an afternoon/evening shower or storm to cool you off, your chances might be few and far between. Thunderstorm activity will be widely separated in nature and will center mainly north and west of town.

I should also mention that while the thunderstorms will be widely separated, the potential is there for strong to severe storms.

Rain chances will increase Friday and Saturday as a cold front slowly pushes through the region. Cooler and less humid air will return by Sunday into early next week as high pressure builds into place.

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