PM Update: Muggy with some rain risk through Thursday; Wildfire smoke forecasting


Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Temperatures in the upper 80s to around 90 cooked up a toasty Wednesday, especially when mixed with dew points in the 60s to near 70. Out ahead of a front that should push through tomorrow night into Friday, we’ve got more muggy and warm conditions, plus the chance for some rain at times.

Through Tonight: Partly cloudy skies continue into evening, becoming a 30-40% chance of showers and thundershowers overnight (perhaps focused on the hours surrounding midnight). This should be hit or miss stuff, if it comes together. Otherwise, it’s quite summer-like thanks to those relatively high humidity levels. Low temps dip to the not-so-cool upper 60s and low 70s.

Tomorrow (Thursday): Looks like a typical August day, featuring muggy air and warm temperatures. Skies are partly cloudy on the whole, with a 40% chance for some showers or thundershowers, mainly in the afternoon and evening, as a front approaches from the west. Highs range from the mid-80s to near 90. Winds are from the west/southwest around 5 to 10 mph.

See Dan Stillman’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.

Sunset over D.C. on Aug 20, 2013. (Erin via Flickr)

Sunset over D.C. on Aug 20, 2013. (Erin via Flickr)

Smoke screening: NOAA has put together a cool animation of wildfire smoke over the United States, showing where it is expected to travel in coming days. The simulation comes from the HYSPLIT model, and indicates smoke over broad regions of the central and western U.S. Watch the short clip below…

Pollen update: Weed pollen is moderate/high, with ragweed coming in at 4.79 grains per cubic meter on its own — a bit lower than normal for this time of August. Mold spores are low/high, and tree/grass pollens are low.

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