Snow may be on the horizon, but Denver will still see summer weather on Tuesday.

High temperatures in the metro area are expected to reach 80 degrees with sunny skies, while critical fire danger remains in the mountains, according to the National Weather Service in Boulder.

A continuation of low humidity and gusty winds prompted the weather service to issue a Red Flag Warning for the mountains, foothills, high mountain valleys and Palmer Divide from 10 a.m. to 6 p.m. on Tuesday. The fire warning will repeat Wednesday afternoon.

The dry, warm weather should make an abrupt U-turn on Wednesday night and into Thursday, when a strong storm system and cold front is expected to bring snow and cold temperatures to large swaths of the state.

The enormous swing will bring temperatures from the upper-70s on Wednesday during the day to below freezing that night, forecasters said. Below-freezing conditions are expected to remain through Thursday.

So how much snow are you likely to see?

Forecasters are calling for 2 to 5 inches Thursday on the plains and Interstate 25 corridor, while the mountains and foothills could see between 4 and 10 inches.

The National Weather Service urged residents to winterize their cars, check tires, locate ice scrapers and prepare emergency kits to keep handy.

Tuesday will also be the day to drain all above ground sprinkler systems.