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A cold front that passed during the midday hours brought a few sprinkles, and left us with a somewhat gusty northwest breeze. But, on the whole, the day turned out fairly tranquil all things considered. Those highs mainly in the mid-60s are about to be a memory though, as much chillier air is inbound.

Through Tonight: A little post-frontal wave of low pressure threatens a mostly cloudy and showery night (60% chance after midnight). Models have backed off on its impact though, and these things can be fickle. At worst, it’s probably a 0.25″ or so event for those who cash in, and other spots might just see ground-wetting sprinkles. Cold air is still slowly seeping in, so we won’t see any “brutal” readings, especially with a dominant cloud blanket. Lows range from near 40 in the coldest spots to maybe as high as the upper 40s downtown.

Tomorrow (Wednesday): Showers remain a decent bet (50% chance) into the morning, but probably tapering midday if not prior. Otherwise, get ready, it might not feel too pleasant out there, and should be the coldest day we’ve seen since the tail end of last winter. Under mostly cloudy but clearing skies, highs are mainly only in the mid-50s, or a range from about 52-57. Add in a brisk northwest wind around 10 mph with higher gusts, and it might feel a bit wintry.

See Matt Rogers’ 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.

Leaves change color in Georgetown. (Erin via Flickr)

Snow! The cold air that’s coming means business, though it will moderate somewhat as it crosses the mountains. Some spots out west, like parts of Iowa and Illinois (including Chicago) are seeing their first snowfall of the season today. Even closer, places like parts of NY, PA and the highlands to our west might see some flakes fall in the times ahead. Here’s a really cool image from Iowa, where the harvest is still ongoing:

Pollen update: Mold spores are low/moderate. All other pollen types are low.