--- 07:00:00 MST Between 19-DEC-2006 and 31-DEC-2006 this observer was on vacation and out of town. Significant snowfall was reported in the media for the 19th-21st (20 inches) and again 28th-29th (again about 20 inches). Returning on the 31st we found over 20 inches of snow on horizontal surfaces. Generally speaking, if the temperature/dewpoint graph shows a single line below 32 degrees then snow was probably occurring.