A strong and extremely cold Pacific storm system moved across Arizona December 29th and 30th. Heavy snow and strong winds produced hazardous weather conditions across much of northern Arizona.

Heavy Snow in WHITE MOUNTAINS, ARIZONA
From 29-DEC-10 06:00:00 to 30-DEC-10 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across the White Mountains area December 29th through the 30th.  Total snowfall amounts include: Pinetop-Lakeside 16.5, and 3 miles southeast of Pinetop-Lakeside 14.

Heavy Snow in GRAND CANYON COUNTRY, ARIZONA
From 29-DEC-10 06:00:00 to 30-DEC-10 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy snow fell across the Grand Canyon Area with 16 inches reported at the Grand Canyon Village.

Heavy Snow in OAK CREEK AND SYCAMORE CANYONS, ARIZONA
From 29-DEC-10 05:00:00 to 30-DEC-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across Oak Creek Canyon and Sycamore Canyon with 11 inches reported in Oak Creek Canyon 7 miles north of Sedona.

Heavy Snow in LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY, ARIZONA
From 29-DEC-10 09:00:00 to 30-DEC-10 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across the Little Colorado River in Navajo County with 7 inches reported in the town of Snowflake and 6 inches 10 miles south of Holbrook.

High Wind in WESTERN MOGOLLON RIM, ARIZONA
From 29-DEC-10 06:00:00 to 29-DEC-10 19:00:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

High wind on the eastern side of the Kachina Peaks blew down a fence. An anemometer measured frequent wind gusts over 50 MPH with a peak gust of 60 MPH.

Heavy Snow in YAVAPAI COUNTY MOUNTAINS, ARIZONA
From 29-DEC-10 06:00:00 to 30-DEC-10 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across the mountains of Yavapai County December 29th through the 30th.  Total snowfall amounts include: Crown King 17, 5 miles northwest of Prescott 11.5,  1 mile west of Prescott 9, and 2 miles northwest of Prescott 8.  I-40 near Ash Fork had delays and was closed periodically during the storm.

Heavy Snow in NORTHERN GILA COUNTY, ARIZONA
From 29-DEC-10 06:00:00 to 30-DEC-10 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across northern Gila December 29th through the 30th.  Total snowfall amounts include: Pine and Christopher Creek both had 16, 18 miles east of Payson 12,  Star Valley 9, and Payson 6.5-7.3.  State Route 87 was closed just south of Payson while a multiple car collision block both north and south lanes of traffic.

Heavy Snow in KAIBAB PLATEAU, ARIZONA
From 29-DEC-10 03:00:00 to 30-DEC-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across the Kaibab Plateau with 12 inches reported at Jacob Lake.

Heavy Snow in EASTERN MOGOLLON RIM, ARIZONA
From 29-DEC-10 05:00:00 to 30-DEC-10 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell across the eastern Mogollon Rim.  Snowfall totals include (inches): Forest Lakes 30, Clints Well 18, Heber Overgaard 12, and Clay Springs 10.

Heavy Snow in WESTERN MOGOLLON RIM, ARIZONA
From 29-DEC-10 05:00:00 to 30-DEC-10 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy snow, strong winds, and blowing snow moved across the western Mogollon Rim from early morning on December 29th through much of the day on the 30th. Some snowfall totals include: 4 miles south of Williams 30 inches, 12 miles north of Parks 24 inches, Munds Park 19.5 inches, Bellmont 18.8 inches,  Williams 18 inches, Flagstaff Airport 17.2 inches, Kachina Village 16 inches, and 15 inches in north Fort Valley. Over 150 motorist needed emergency assistance in the Flagstaff area with roll overs, slide offs, and wrecks.  Both I-17 and Highway 89 south of Flagstaff were closed due to the dangerous conditions.