A low pressure system will bring colder weather to the Tri-Cities this weekend and will drop snow levels in the mountains, according to the National Weather Service.
Highs are expected to drop into the 40s and lows into the 20s in the Tri-Cities.
Friday the high could be as cool as 49 but a 40 percent chance of rain continuing through Saturday will keep the Friday overnight low tonight well above freezing.
However, Saturday the high could drop to 42 in the Tri-Cities and the low to 28.
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Sunday should be mostly sunny with a high of about 44 and a low Sunday night of 26.
In the mountains, snow levels are expected to drop to around 1,500 to 2,000 feet with most mountain locations in Washington and northeast Oregon receiving significant snowfall.
A winter storm watch has been issued for the Blue and Cascade Mountains as the low pressure system over Northwest Canada moves into the Pacific Northwest on Friday.