Extremely dense morning fog was eventually overcome by the strong late March sun and incoming flow from the south. Temperatures responded by warming into the mid-to-upper 70s around D.C. to the low 80s towards Fredericksburg . Fog returns early Friday - but not as extensive as today. The balance of Friday is partly to mostly sunny and probably a bit warmer than today.

Through Tonight: Partly cloudy skies for much of the night, with patchy fog developing pre-dawn. Lows range from 56-61 (suburbs-city) - warmer than our average highs yet again.

Friday: Any early morning fog burns off - probably faster than today - by mid-morining. Then it’s mostly sunny through mid-to-late afternoon. Towards evening, some high clouds increase with highs around 80. Winds are light.

See David Streit’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter. For related traffic news, check out Dr. Gridlock.

Pollen: Due to recent clouds and moisture, the tree pollen count was LOW to MODERATE at about 10 grains per cubic meter.

NASA rocket launch: Wallops Flight Facility will again try to launch 5 rockets tonight to study winds in the upper atmosphere. Read our blog for more: NASA to launch 5 rockets in 5 minutes from Wallops, Va. Thursday night (maybe) | Launch status updates from NASA

Jason is the Washington Post’s weather editor and Capital Weather Gang's chief meteorologist. He earned a master's degree in atmospheric science, and spent 10 years as a climate change science analyst for the U.S. government. He holds the Digital Seal of Approval from the National Weather Association.