Winter Watches and Warnings
A Winter Storm Watch is issued when winter storm conditions are possible within the next three days, but the timing, intensity, or occurrence may still be uncertain.
A Winter Storm Warning is issued when heavy snow is occurring or will develop in the next 36 hours. the heavy snow may be accompanied by wind greater than 15 mph and blowing snow.
A Blizzard Watch is issued when blizzard conditions are possible in the next 12 to 36 hours.
A Blizzard Warning is issued in lower elevations when the following conditions are expected for at least three hours:
A Winter Weather Advisory is issued:
Heavy snow criteria for eastern and central Colorado are representative values applied over a large geographic area: