A low pressure area slowly moving through the  Great Basin and Colorado brought snow to northern Arizona. Over a foot of snow fell over portions of the Mogollon Rim where the upslope flow enhanced the snowfall.

Heavy Snow in GRAND CANYON COUNTRY, ARIZONA
From 01-DEC-11 13:30:00 to 02-DEC-11 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Eight inches of snow fell at both the South Rim and Desert View.

Heavy Snow in LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY, ARIZONA
From 01-DEC-11 20:00:00 to 02-DEC-11 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in Snowflake with 15.0 inches and Taylor with 14.0 inches.

Heavy Snow in LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY, ARIZONA
From 01-DEC-11 22:00:00 to 02-DEC-11 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Eight inches of snow fell 10 miles south of Petrified Forest National Park.

Winter Weather in NORTHEAST PLATEAUS AND MESAS SOUTH OF HIGHWAY 264, ARIZONA
From 01-DEC-11 18:00:00 to 02-DEC-11 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five inches of snow fell in Dilkon.

Heavy Snow in KAIBAB PLATEAU, ARIZONA
From 01-DEC-11 08:00:00 to 02-DEC-11 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell over the Kaibab Plateau. Jacob Lake reported around 12 inches of snow and the North Rim of the Grand Canyon reported 14 inches of snow.

Winter Weather in WESTERN MOGOLLON RIM, ARIZONA
From 01-DEC-11 16:00:00 to 02-DEC-11 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow began to fall by mid morning and increased in the afternoon.  Interstate 40 was closed in both directions for the afternoon Thursday as Arizona Department of Transportation worked with officers from the Arizona Department of Public Safety to remove the debris from a number of crashes in the eastbound lanes.  There were five different collisions with the largest involving nine vehicles. The was a 16 mile backup. One driver reported being delayed 11 hours. West bound lanes became blocked when vehicles could not make it up the hill just west of the I-17 interchange.  Eight people were transported to the Flagstaff Medical Center.  North bound I-17 was also blocked for a time due to collisions blocking the roadway.  Highway 180 north of Flagstaff was blocked for a time because of a jack-knifed semi.  Some snowfall totals include (inches): Bellemont 10.5, Flagstaff Airport 6.5, Mormon Lake 5, Munds Park 4, and 4 miles south of Williams 4.

Heavy Snow in EASTERN MOGOLLON RIM, ARIZONA
From 01-DEC-11 20:00:00 to 02-DEC-11 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell over the Eastern Mogollon Rim.  Snowfall totals include (inches): Linden 15.5 and Heber-Overgaard 10.5.

Heavy Snow in WHITE MOUNTAINS, ARIZONA
From 01-DEC-11 23:00:00 to 02-DEC-11 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell over the White Mountains area.  Two feet of snow was reported at the  Show Low airport and eight inches fell in McNary.