Cheyenne National Weather Service

Winds and blowing snow will create near-blizzard conditions in some areas.

A -30 was recorded in Cheyenne, but that was far from the coldest around the region as Alliance, Nebraska checked in with a -51.

The forecast is calling for six to 12 inches of snow in the Sierra Madre and Snowy Range mountains.

Wind Chill Advisories are in effect for much of southeast Wyoming and the Nebraska Panhandle through Monday morning for wind chill temperatures as cold as 30 degrees below zero.

While wind chill affects people and animals, experts say it does not affect automobiles or other inanimate objects.

Enjoy today and tomorrow, because big changes are ahead in our weather picture.

Hail up to the size of a quarter, strong wind gusts up to 60 MPH are also possible with these storms.

While 60 mile per hour winds, heavy rain and hail up to one inch in diameter are the biggest threats, isolated tornadoes are also possible. T

The agency says the twister occurred during a rare derecho event.

Tennis-ball size hail and winds of up to 65 MPH are the main hazards expected with these storms.