* WHAT…Very cold wind chills of 35 to 50 below expected.
* WHERE…Bighorn Mountains Southeast and Bighorn Mountains West.
This includes Powder River Pass and Granite Pass.
* WHEN…From 10 PM Sunday to 5 AM MST Tuesday. The coldest wind
chills will be Sunday night into Monday morning.
* IMPACTS…The dangerously cold wind chills as low as 50 below zero
could cause frostbite on exposed skin in as little as 10 minutes.