Posted: 10PM December 20th: This has been the biggest blizzard we have had since we lived in Colorado for the past 7 years and it's not over yet. We measured from 14 to 20 inches of snow in most places of the yard. With the winds some of the drifts were over 4 feet deep by sunset.
Here is the weather service warning for that night:
URGENT - Winter Weather Message
National Weather Service Denver Co 359 pm MST Wed Dec 20 2006
...Strong winter storms to continue over northeast and north central Colorado tonight into Thursday morning .a major winter storm will continue bringing widespread moderate to heavy snow and blizzard conditions to northeast and north central Colorado this tonight into Thursday morning. The storm producing this weather is centered over the extreme southeast corner of Colorado. It is expected to move little through Thursday morning.
At 4 pm MST...snowfall amounts over the plains range from about 6 to 11 inches so far with the storm. The urban corridor has seen about 9 to 14 inches so far. The foothill and Palmer Ridge...including the southern and southwestern great Denver area have had 14 to 21 inches thus far. The higher mountains east of the divide have had 12 to 22 inches so far. Wind gusts of 30 to 40 mph are widespread across the plains with snow drifts up to 6 feet. Travel has become impossible this afternoon across most of northeast and north central Colorado. Travel is not recommended through Thursday morning.
Boulder and Jefferson counties below 6000 feet: 359 pm MST wed Dec 20 2006: A blizzard warning remains in effect until 12 pm MST Thursday. Snow heavy at times will continue into Thursday morning. Total accumulations of 12 to 24 inches are expected in most locations by Thursday morning. As much as 30 inches of snow will fall in the southern and southwestern metro Denver suburbs and the Palmer Divide area. North winds of 20 to 35 mph will produce blizzard conditions. Travel is not recommended through Thursday morning.