Clouds cleared overnight allowing temperatures across Star Valley to plummet.  Here is a list of recorded minimums this Sunday morning.

Thayne ES                                              -22
Double L Ranch (4 NW of Etna)            -20
Osmond ES                                            -17
Smoot                                                     -17
Etna ES                                                   -16
2 NE Etna                                               -16
Alpine                                                      -15
Star Valley Ranch                                    -10

Other nearby locations
West Yellowstone MT                              -38
Yellowstone Lake WY                             -36
Driggs ID                                                 -28
Bondurant                                                -28
Farson                                                     -25
Box Y Ranch                                           -25

The very cold upper trough will remain over the area through Monday, with another possibly colder night on tap for Western Wyoming.  If skies remain generally clear, conditions will be favorable for minimums to be another 5 degrees colder Monday morning.

High pressure will dominate much of the west through the coming week, so little additional snow is expected until at least next weekend across Star Valley.  Nights will continue below zero, with a slow daytime warming trend after Monday.