Weather Alert

The tornado warning is upgraded from a previous tornado watch.

To report severe weather contact your nearest law enforcement agency.

Although wind will be relatively light with speeds under 10 mph, that will still produce wind chill readings of 15 to 25 degrees below zero or lower.

Elsewhere, the National Weather Service reports winter weather advisories and watches for portions of western Wyoming on Sunday and Monday.

An actual temperature in one Wyoming town was recorded at near 40 below zero.

Two to four inches of snow could fall in the lower elevations, followed by sub-zero temperatures.

Expect Southwest winds of 30mph to 40mph and gusts up to 60mph possible, especially on Outer Drive in Casper.

The National Weather Service predicts two to four inches of snow and gusty winds, with four to eight inches on Casper Mountain.

NWS meteorologists say the snow will begin as a rain and snow mix in the lower elevations, with total snow accumulations of three to five inches.

Saturday from noon to midnight is the peak time.