A very strong area of low pressure moved across Southeast Arizona on February 20th resulting in very low snow levels across the region. Snow levels dropped as low as 2000 feet with measurable snow at elevations 2500 feet and higher including the Tucson metro area. Many schools in southeast Arizona either closed February 20th and/or had delayed starts February 21st.

Winter Storm in UPPER SANTA CRUZ RIVER AND ALTAR VALLEYS, ARIZONA
From 20-FEB-13 11:00:00 to 20-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Two to four inches of snowfall occurred across the lower elevations of Santa Cruz county and the Altar Valley in Southern Pima County.

Winter Storm in SOUTHEAST PINAL COUNTY, ARIZONA
From 20-FEB-13 11:00:00 to 20-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread low elevation snowfall occurred in Southeast Pinal County above 2500 feet. The Oracle area at about 4500 feet had about 6 inches of snowfall.

Winter Weather in UPPER SAN PEDRO RIVER VALLEY, ARIZONA
From 20-FEB-13 13:00:00 to 20-FEB-13 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Widespread snowfall occurred across the valleys of Western Cochise County with 2 to 4 inches across the region.

Winter Storm in EASTERN COCHISE COUNTY BELOW 5000 FEET, ARIZONA
From 20-FEB-13 14:00:00 to 20-FEB-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread snowfall occurred across the valleys of Eastern Cochise County with 2 to 4 inches across the region.

Winter Storm in UPPER GILA RIVER AND ARAVAIPA VALLEYS, ARIZONA
From 20-FEB-13 14:00:00 to 20-FEB-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall occurred across the Aravaipa Valley with 5.5 inches in the Klondyke area.

Winter Storm in GALIURO AND PINALENO MOUNTAINS, ARIZONA
From 20-FEB-13 12:00:00 to 20-FEB-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Widespread snowfall occurred the Galiuro and Pinaleno Mountains with 16 inches at Mt. Graham.

Winter Storm in SANTA CATALINA AND RINCON MOUNTAINS, ARIZONA
From 20-FEB-13 10:00:00 to 20-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread snowfall occurred across the Catalina and Rincon mountains with 12 inches on Mt. Lemmon.

Winter Storm in CHIRICAHUA MOUNTAINS, ARIZONA
From 20-FEB-13 15:00:00 to 20-FEB-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Widespread snowfall occurred across the Chiricahua Mountains with around 6 inches in the lower elevations and around a foot in the higher terrain.

Winter Storm in BABOQUIVARI MOUNTAINS, ARIZONA
From 20-FEB-13 09:00:00 to 20-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Widespread snowfall occurred across the Baboquivari Mountains with 6 inches on Kitt Peak.

Winter Storm in TUCSON METRO AREA, ARIZONA
From 20-FEB-13 11:00:00 to 20-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Widespread low elevation snowfall occurred across the Tucson Metro area with anywhere from 1 to 4 inches across the region. Tucson International Airport received 2 inches of snowfall. The Tucson airport briefly diverted flights headed to Tucson. A major golf tournament in Marana was suspended due to the snow.

Winter Storm in DRAGOON/MULE/HUACHUCA AND SANTA RITA MOUNTAINS, ARIZONA
From 20-FEB-13 13:00:00 to 20-FEB-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread snowfall occurred across the mountains of Cochise County including 6 inches in the Bisbee area. The Mule Pass Tunnel on Highway 80 was closed due to the snow.