...Cold front will bring freezing temperatures to western Wyoming overnight... .A Canadian cold front will push through the area late tonight resulting in below freezing temperatures after midnight through Friday morning. Jackson Hole-Star Valley- Including the cities of Jackson, Afton, Alpine, Star Valley Ranch, and Thayne 114 PM MDT Thu Jun 20 2019 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT FRIDAY... The National Weather Service in Riverton has issued a Freeze Warning, which is in effect from midnight tonight to 8 AM MDT Friday. * LOCATIONS...Including the cities of Jackson, Afton, Alpine, Star Valley Ranch, and Thayne. * TEMPERATURE...Low temperatures will fall between 30 to 32 degrees for several hours overnight. * IMPACTS...The cold temperatures could harm sensitive outdoor plants. Residents are encouraged to bring in, or cover up any sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation.