From the ABC 7 Weather team  Washington DC Weather: Warm and
humid with limited sunshine  May 21, 2013 - 07:40 AM Text size
Decrease Increase  Heat and humidity will build until a cold
front crosses the area later Thursday.  Becoming partly cloudy,
warmer, AM showers, PM thunderstorm  Highs: 84º-89º
Precipitation: 20% Isolated storms ending. Mild and muggy. 
Lows: 62º-72º Precipitation: 20% Partly cloudy, hot and humid.
Isolated thunderstorms Highs: 85º-89º Precipitation: 30%  With
high pressure anchored over the western Atlantic, southerly
winds are well established. These winds will continue to draw in
warmer and more humid air until a cold front crosses the area on
Thursday afternoon. There will be some sunshine at times and
high temperatures will climb well into the 80s. Isolated
afternoon showers and thunderstorms will be possible this
afternoon and Wednesday. As the cold front approaches on
Thursday, showers and thunderstorms will become more numerous
and widespread.  A large area of cool, high pressure