Roads

Most park roads have reopened for the season, as have the other park entrances.

Another storm system could bring snow to parts of Wyoming late Friday into Saturday, Day added.

At Mammoth Hot Springs, the gift shop, ski shop and food services will close for the winter season on Sunday.

For current road conditions, visit Wyoroad.info, call 511 or use the Wyoming 511 app.

Teton Pass west of Jackson was closed for avalanche control and U.S. 89 southwest of Jackson was closed because of an avalanche.

On Thursday, WYDOT crews worked to clear snow drifts that were reported to be three to five feet deep, some of them a mile in length.

By Thursday morning, Day says arctic air will have spread to the south into central and east-central areas of Wyoming.

Xanterra general manager Mike Keller says any assistance from others, such as the state of Wyoming, to keep Yellowstone access open would help.