A winter weather advisory was posted for 1 to 3 inches of snow across mountainous areas in Ferry and Okanogan counties from an unusually cool June storm.
In addition, moderate to heavy rain could trigger urban and small stream flooding from Coeur d’Alene and Spokane westward to Lincoln County and areas to the north.
A flood advisory was issued through 10:45 p.m.
Farther north, snow was covering state Highway 20 at Sherman Pass with a snow level of 4,500 feet in elevation, the National Weather Service said.
Snow was also reported at Schweitzer Mountain Resort in Sandpoint.
A moist upper-level low pressure system has set up over northwest Montana and is circulating cool air and rain westward across the Inland Northwest in a wraparound fashion.
The heavy rain was visible on radar images and is expected to continue until later today as it slowly moves out of the area. Water could cover roadways in low spots and fields may see flooding.
In Spokane at 11 a.m., light rain was falling at a temperature of 43.
A high of 53 is expected today, which is about 18 degrees below a normal high of 71.
A total of 0.14 inches of rain was reported in the 24 hours ending early this morning, bringing the two-day storm total to about 0.85 inches.
Showers are expected through Sunday with breaks tonight and during parts of the day on Friday. Highs will run in the 50s to 60s with lows in the 40s.