Much of Colorado is soaked tonight, while other parts are looking a bit like winter, according to the National Weather Service.
Rain might not let up until morning along parts of the Front Range, as the high country weathers its first widespread snowfall.
A cold front from Canada moved in today and met a moist upper-level disturbance from Arizona and Utah tonight, forecasters said.
Heavy snow has temporarily closed Trail Ridge Road through Rocky Mountain National Park and could drop up to 6 inches on areas above 9,000 feet, including Aspen, Vail, Snowmass, Crested Butte, Ouray, Telluride, Lake City and Silverton, forecasters said.
Denver could pick up more than an inch of rain overnight, and record its coldest temperatures since May, according to the National Weather Service.
The low temperature in Denver before midnight is expected to reach 44 degrees, the coldest reading since May 31, according to weather records.
The average temperature for the date is 79 degrees.
The metro region has a 40 percent chance of rain Thursday afternoon, with the high climbing back to 64. The moisture moves out Friday, as temperatures warm back into the upper 70s for the weekend.
Parts of Boulder County have recorded more than 3 inches of rain tonight, and authorities are telling people, including in the city of Boulder, to stay away from streams because of faulty, saturated banks and fast-flowing current.
Forecasters are warning of potential flash floods from the runoff in Colorado Springs, Black Forest Fountain, Manitou Springs, Monument, Woodland Park and other communities in the area.
The 1.57 inches recorded as of 8 p.m. at Colorado Springs Airport more than tripled the previous record for the date set in 1957.
Several streets were flooded in Colorado Springs.
