Much colder weather and snow on the way
Cold temps and snow by next weekend
by National Weather Service
November 7, 2012
Much colder weather along with some accumulating snow is expected toward the end of the week.
After one more warm day across western and central Wyoming today (Wednesday, November 7th), much colder weather along with accumulating snow is expected later this week.
Today will be the last unseasonably warm day in the near future. High temperatures will generally be in the 60s at the lower elevations east of the Divide today and in the 50s at the lower elevations west of the Divide. Highs will be as warm as the low 70s in the lower elevations of Johnson County today.
A backdoor cold front will affect areas east of the Divide Thursday with high temperatures dropping as much as 25 degrees in Johnson County where the high temperatures should be in the mid 40s. The cool down Thursday should not be quite as dramatic elsewhere.
Also on Thursday a winter storm will slowly track east to Wyoming from the Pacific. Mountain snow and valley rain Thursday will become all snow in western Wyoming by Thursday night. As of now it appears that by Friday morning snow could accumulate 1 to 2 inches in the western valleys and 3 to 4 inches in the mountains, especially in Yellowstone Park. On Friday, the precipitation will spread southeast to areas east of the Divide with the rain changing to snow at the lower elevations east of the Divide late Friday. The snow will continue Friday night and into Saturday morning before tapering off. By Saturday morning, 5 to 8 inches of snow could accumulate in the western mountains with 9 to 10 inches possible in portions of Yellowstone Park and the Tetons along with 4 to 5 inches in the western valleys and in the Big Horn Mountains. 1 to 2 inches of snowfall is expected to fall mainly Friday night elsewhere including the lower elevations east of the Divide.
In addition, much colder air will filter into all of western and central Wyoming by late Friday night and into Saturday. Temperatures will remain in the upper teens and low 20s Saturday morning through Saturday afternoon. This is about 50 degrees colder than the high temperatures expected today. With the added component of the wind, it will feel like 5 to 15 degrees Saturday and 5 below zero to 5 above in western Wyoming. Temperatures will then drop to the single digits in many areas Saturday night. Temperatures in western Wyoming are expected to be between zero and 5 below zero Saturday night.
Hunters and any others with outdoor interests should anticipate and prepare for dramatically colder and snowy winter-like conditions by the end of this week. Stay tuned for further updates on this developing winter weather event.