By National Weather Service in Cheyenne, WY
A very potent cold front will sweep across the area on Wednesday. Dangerous wind chills, coupled with strong winds and snow accumulations will create a flash freeze event.
Temperatures are expected to drop 25 to 40 degrees over the course of 1-2 hours once the cold front moves through your local area. Temperatures will go from the 30s/40s to below zero in a very short time on Wednesday.
Near record low temperatures are expected Wednesday night for some folks as overnight lows of -20F to -35F are expected, with strong winds of 35-65mph making wind chill values as cold as -40F to potentially -70F Wednesday night. The coldest wind chills are anticipated over the Pine Ridge area. See follow up images for more details.
This is NOT your typical winter event for the month of December. Please make sure to make the necessary precautions as soon as possible due to the likelihood of serious agricultural and human impacts during this event. This includes bringing in your pets, having your faucets drip overnight, and having structure protection for any livestock that are normally exposed. Human and animal fatalities will be possible if adequate precautions are not taken during this event.
We can not emphasize enough - the cold air and wind chill forecast tomorrow (Wednesday) night thru Thursday features some of the most extreme values you will ever see!
Please take all precautions possible: Check on elderly/vulnerable, protect pets, shelter livestock, cover exposed skin.
