Pittsburgh will experience a break from the current chill at midweek, but with the milder temperatures will also come rain.
Cool air will remain in place across southwestern Pennsylvania through Monday, sending temperatures in Pittsburgh into the 20s Sunday night and holding Monday's highs to just shy of 50 degrees.
A break in the chill will come on Tuesday with temperatures rebounding to the upper 50s.
Further warming on Wednesday will cause temperatures to approach 65 degrees.
Umbrellas can be left at home through Wednesday with dry weather in control.
The warming will occur ahead of a cold front that is set to return rain and gusty winds to western Pennsylvania on Thursday.
While widespread wind damage is not expected, wind gusts could become briefly strong enough Thursday morning for isolated tree damage and power outages as the storm's cold front passes through.
In the front's wake, another blast of colder air and brisk winds will follow for late week.
The worst of the ice headed to the eastern U.S. will focus on the I-81 corridor from Virginia to southern Pennsylvania.
While heavy snow and ice are not expected to fall over much of the Midwest Sunday into Monday, some slippery roads and travel disruptions are likely.
As the saying goes, no two snowflakes are exactly alike. Russian photographer Alexey Kljatov's collection of high-resolution magnified flakes makes this widely-held belief more convincing.
Fresh cold and the return of Santa Ana winds are in store for Southern California to start the new week.
Tropical Cyclone Madi has developed over the Bay of Bengal, northeast of Sri Lanka and east of India.
A magnitude 4.5 earthquake shook the ground near Jones, Okla., Saturday afternoon.
LaMesa, CA (1938)
100 degrees, warmest ever in US for Dec. Downtown LA had 91.7 degrees, only 90 degree reading in December.
Elkton, MD (1963)
Jet liner exploded near Elkton, MD killing all 81 on board. Lightning is believed to have caused the explosion of residual fuel under one of the outboard wing tanks as plane passed through a vicious thunderstorm.