A bright moon overnight -- the last full moon of the winter -- became obscured before dawn by clouds from an approaching system that will bring a mix of weather today to southwestern Pennsylvania.
While temperatures in Pittsburgh and nearby areas are expected to remain above freezing and only rain will fall, higher elevations to the south and east of the city won't be as fortunate.
The National Weather Service in Pittsburgh has issued a winter weather advisory from 9 a.m. to 7 p.m. for the ridges in Fayette and Westmoreland counties. Once precipitation moves in this morning, about one-tenth of an inch of ice may accumulate, causing slick roadway conditions. Winds from the southeast will reach 20 to 25 mph with gusts to 35 mph.
A winter storm warning has been issued for Somerset County, and for Preston and Tucker counties in West Virginia and for Garrett and western Allegany counties in Maryland. The weather service said dangerous ice accumulations are likely. Winds gusts may reach 45 mph.
The Pennsylvania Turnpike issued a weather alert from the Ohio line eastward for just over 200 miles.
In Pittsburgh and the suburban area, rain should begin to fall by late morning with highs reaching into the low 40s.
For the latest watches, warnings and advisories, visit the website of the National Weather Service in Pittsburgh.