Through Tonight: The main stories for tonight are warmth and mugginess. The derecho over the Midwest passes safely to our north while falling apart, leaving us under partly cloudy skies. I can’t totally rule out a pop up storm through early evening, mainly south of town, but if so it should be quite isolated. Temperatures only get down into a 72-78 range most spots. D.C. may flirt with a low of 80. Yuck! Winds are light from the south.
Tomorrow (Tuesday): Hope you like it hot. This should be the toastiest day of the year, so far, as temperatures head off warm morning readings toward highs in the mid-90s to near 100. Add in high humidity, and widespread heat indices in the 100 to 110 range seem a good bet. As a cold front approaches late day, clouds should bubble, and storms are likely by late afternoon. It shouldn’t be full coverage on storms, but any that pop may be strong to severe.
Pollen update: Grass pollen and mold spores are LOW/MODERATE. Weed and tree pollen is low.