At a Glance

Winter Storm Aiden brought the first accumulating snow of the season to Denver.The snow prompted an interstate closure in southeast Wyoming.Scattered power outages, broken tree limbs and poor travel conditions were the main impacts.

Winter Storm Aiden brought the first snow of the season to the Denver metro area, but itsheavy, wet snow inparts of Wyoming, Colorado and western Nebraska triggered scattered power outages, not to mention travel headaches in the region.

Aiden was a quick-hitting winter storm, partially spawned by a southward dip in the jet stream sweeping into the Rockies. The cold air supplied by that jet stream dip, combined with an upslope northeast surface wind flow, producedthesnow along the Interstate 25 corridor, including in Denver and Cheyenne, Wyoming, as well as parts of the High Plains of western Nebraska and eastern Colorado.

(MORE: )

Precipitation changed over to snow just after midnight Monday morning, Oct. 9, in the city of Denver, where 2.8 inches of snow wasreported at Denver International Airport as of 6 p.m. MDT Monday, Oct. 9, mainly on grassy surfaces.

This was Denver's earliest first snow of the seasonsince 2012. 2016's first measurable snowfall in the Mile High City didn't occur untilNov. 17. The long-term average first measurable snow of the season in Denver isOct. 18.

As usual, heavier amounts were reported in the foothills west of Interstate 25, including 12.4 inches in Geneseeand 9.5 inches near Pingree Park, in Larimer County, Colorado.

The peak totals in the Denver metro area were a trio of 7-inch snow totals in Broomfield and Arvada.

The heaviest snow total from Winter Storm Aiden was an estimated 15.4 inches at the DeadmanHill SNOTEL station near Glendevey, Colorado. The Cinnabar Park SNOTELnear Centennial, Wyoming, was not far behind with 15 inches of snow.

In Wyoming, a stretch of Interstate 80 from east of Rawlins to Cheyenne was shut down early Monday morning, Oct. 9, due to dangerous winter driving conditions, according to the .

(IMPACTS: )

Cheyenne, Wyoming, officially reported 5.7inches of snow at the Cheyenne Regional Airport between Oct. 8 and Oct. 9.

Elsewhere in Wyoming, 6 inches of snow was measured on Casper Mountain, 8 inches of snow was estimated in Park Countyand up to 5 inches was estimated in Yellowstone National Park, according to the National Weather Service's Riverton, Wyoming, office.

Interestingly, the morning after Aiden's snow ended, Laramie, Wyoming, recorded , and one of their earliest subzero lows on record.

Some light accumulations prompted the in South Dakota's Custer State Park for a time Sunday, Oct. 8.

Aiden wasthefirst named winter storm of the season, although parts of the Rockies had seen multiple rounds of snow since September, .

(MORE: )