A very large are of low pressure brought wind, rain, and snow to northern Arizona Thanksgiving day and Black Friday. Strong southerly winds brought very moist air over Arizona with rising snow levels. Heavy rain fell below around 7500 through much of Thanksgiving Day with lowing snow levels the night of November 29th into the 30th with the passage of a cold front. Snowfall was eventually reported at the bottom of The Grand Canyon. Significant snow was reported as well as increased flows in lower elevations creeks and rivers.

Flash Flood in COCONINO, ARIZONA
From 28-NOV-19 22:00:00 to 29-NOV-19 05:45:00 (MST-7)
Location: HAVASUPAI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain fell over the Cataract/Havasu Creek drainage. The stream gauge at Supai peaked started to rise at 1100PM and peaked at 17.1 feet (245 AM), just above flood stage (base flow is 14.7 feet). There were reports on social media of flooding in the campground with personal gear being swept way.

Flood in YAVAPAI, ARIZONA
From 29-NOV-19 12:50:00 to 29-NOV-19 18:00:00 (MST-7)
Location: CANYON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Black Canyon Wash was flowing over Maren Ave about 1.5 feet deep by 1250 PM (from a river gauge reading of about 3.25 feet). The river eventually rose to 16 feet on the river gauge (a 13.5 foot rise).  The river dropped to around 5 feet on the river gauge by around 8 PM on December 4.

Heavy Snow in OAK CREEK AND SYCAMORE CANYONS, ARIZONA
From 29-NOV-19 05:00:00 to 29-NOV-19 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sedona received 4.5 inches of snow at an elevation of 4500 feet by 900 AM.

Heavy Snow in CHINLE VALLEY, ARIZONA
From 29-NOV-19 02:00:00 to 30-NOV-19 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Seven inches of snow was reported at Buffalo Pass (8,400 feet elevation) at 1000 AM November 29. It was still snowing.

Heavy Snow in CHUSKA MOUNTAINS AND DEFIANCE PLATEAU, ARIZONA
From 29-NOV-19 02:00:00 to 30-NOV-19 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Seven inches of snow was reported at Buffalo Pass (8,400 feet elevation) at 1000 AM November 29. It was still snowing.

Heavy Snow in KAIBAB PLATEAU, ARIZONA
From 29-NOV-19 04:00:00 to 29-NOV-19 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Five inches of snow fell in Fredonia at an elevation around 4700 feet.

Avalanche in WESTERN MOGOLLON RIM, ARIZONA
From 30-NOV-19 02:00:00 to 30-NOV-19 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Avalanche debris were seen from two different natural avalanches at around 11,700 feet in the San Francisco Peaks in the Kachina Peaks Wilderness about 13 miles north of the Flagstaff Airport.  The sides were on the north-northeasterly aspects.

Heavy Snow in LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY, ARIZONA
From 29-NOV-19 03:00:00 to 29-NOV-19 16:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nine inches of snow was reported 2 miles east-northeast of Concho. A trained spotter measured a foot of snow 8 miles north of Vernon at 6,600 feet. More than an inch of rain fell before changing to snow around 300 AM on November 29.

Heavy Snow in WHITE MOUNTAINS, ARIZONA
From 29-NOV-19 08:00:00 to 30-NOV-19 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Eight inches of snow fell in Show Low by 1230 PM with snow still falling.  A spotter 4 miles northwest of McNary reported 10.5 inches of snow. The Pintop-Lakeside ended up with 9.5 inches of snow (1.49 total melted snow/rain).

Heavy Snow in YAVAPAI COUNTY MOUNTAINS, ARIZONA
From 29-NOV-19 00:00:00 to 29-NOV-19 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The snow level lowered and rain changed to snow over some of the observation sites around midnight.  Here are some of the snowfall totals (in inches): Groom Creek 12,
Seligman  10 - 13, 10 miles west of Seligman 8.0, Prescott Courthouse 7 - 10, Skull Valley 7, and Chino Valley 6. Several large tree branches broke around Prescott due to the heavy wet snow. A foot of snow was reported 10 miles west of Ash Fort at about 5200 feet elevation.

Heavy Snow in COCONINO PLATEAU, ARIZONA
From 29-NOV-19 00:00:00 to 30-NOV-19 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Eighteen inches of snow fell in Fraziers Well area. The Valle area had 10-14 inches of snow by 700 AM. Thirteen inches of snow fell 10 ENE of Seligman. Eleven inches of snow fell 4 miles north of Ash Fork at an elevation of 5100 feet above sea level. A foot of snow fell at Grand Canyon Caverns at an elevation of 5600 feet.

Heavy Snow in NORTHERN GILA COUNTY, ARIZONA
From 29-NOV-19 04:00:00 to 30-NOV-19 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rain changed over to snow around 600 AM on November 29 in Star Valley at 48000 feet. Five inches of snow was measured at 1120 AM. A public report of 9.9 inches of new snow was received from Washington Park at 5,400 feet elevation. Twelve inches of snow fell in Strawberry at about 5,900 feet elevation. Three to five inches of snow fell in Payson right around 5000 feet.

Heavy Snow in WESTERN MOGOLLON RIM, ARIZONA
From 29-NOV-19 04:00:00 to 30-NOV-19 14:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The snow level lowered to around 7000 feet and rain turned to snow across the Western Mogollon Rim population centers by 400 AM on November 29.  Many areas had received 8 inches of snow by 800 AM.  Here is a storm total (in inches): Hart Prairie (9000 feet) 30,  Flagstaff Airport 16.8, Flagstaff 14 - 19, Parks 15 - 18,  Bellemont (NWS Flagstaff) 17.0, Munds Park 12.2, and Williams 15 - 18. A storm total of 22 inches fell 5 miles west of Parks. Thirty inches of snow fell at 11,800 feet elevation. Interstates 17 and 40 and Highway 89A through Oak Creek Canyon were close as a preemptive measure around Flagstaff during the storm to allow crews to keep the roads clear (local traffic was still allowed to use these roads).  Several wrecks and collisions were reported in the interstates after the roads re-opened.

Heavy Snow in EASTERN MOGOLLON RIM, ARIZONA
From 29-NOV-19 03:00:00 to 30-NOV-19 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Forest Lakes received half an inch of rain before the precipitation changed over to snow. at around 300 AM. Ten inches of snow fell by 1000 AM...with snow still falling. Sixteen inches of snow was reported in Forest Lakes by the time it stopped snowing around noon on November 30. State Route 87 from Payson to Winslow was closed for a period of time during the storm.

Heavy Snow in YAVAPAI COUNTY VALLEYS AND BASINS, ARIZONA
From 29-NOV-19 03:00:00 to 29-NOV-19 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Seven inches of snow fell in Skull Valley  by 842 AM at an elevation of about 4500 feet. Wilhoit received 6 inches of snow by 944 AM at an elevation of 4800 feet. State Route 260 from Camp Verde to Cottonwood was closed during this storm...at an elevation of around 3,200 feet above sea level.

Heavy Snow in GRAND CANYON COUNTRY, ARIZONA
From 29-NOV-19 01:00:00 to 30-NOV-19 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Grand Canyon Village received 13 - 15 inches of snow (above 6800 feet elevation).   A light dusting of snow fell at the bottom of the Canyon at Phantom Ranch (2460 feet elevation). The Grand Canyon National Park  and the near by City of Tusayan lost power during the storm impacting more than 1,000 people.  The city declared a state of emergency.