A significant rain event occurred across much of southeast Arizona November 27th through the 29th. Three-day rainfall totals of 1 inch were widespread, but the most rain fell in Cochise County and adjacent sections of Graham, Pima and Santa Cruz Counties where amounts of 2 to 3 inches was common.  Over 5 inches fell in some locations within Cochise County near the International Border and in the San Pedro watershed in Sonora.  The heaviest period of rain there occurred on the 27th, which caused flooded roadways into the 28th and also caused the San Pedro River to overflow its banks east of Hereford.  Damaging winds occurred ahead of, and along, a cold front on November 29th. The most significant wind damage occurred with thunderstorms during the early morning hours of the 29th in Avra Valley, Marana, Oro Valley and Catalina.

Thunderstorm Wind in PIMA, ARIZONA
From 29-NOV-19 06:26:00 to 29-NOV-19 06:50:00 (MST-7)
Location: TUSCON MARANA NW AIRPORT
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds downed several trees and caused roof and wall damage in parts of Avra Valley and Marana.  Additionally, an unoccupied fifth wheel trailer was blown on its side. Two power poles were also damaged near Twin Peaks Rd and Quarry Rd.

Thunderstorm Wind in PIMA, ARIZONA
From 29-NOV-19 07:08:00 to 29-NOV-19 07:15:00 (MST-7)
Location: ORO VLY
Magnitude: 65.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A line of thunderstorms caused extensive tree damage from the Rooney Ranch and Steam Pump Ranch area through Oro Valley Marketplace to Catalina Regional Park.  A portion of the roof to an outbuilding was blown off at Steam Pump Ranch.  The most severe damage occurred to trees within the park and in a residential area immediately to the east.  Several one-foot diameter trees were snapped off at the midpoint of the trunk while others were uprooted.  Roof damage to mobile homes farther east was also noted. A tree fell on a car at one residence.

Thunderstorm Wind in SANTA CRUZ, ARIZONA
From 29-NOV-19 07:30:00 to 29-NOV-19 07:30:00 (MST-7)
Location: NOGALES
Magnitude: 48.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was uprooted by thunderstorm winds near City Hall in Nogales.  A soaking rain of nearly 1.5 inches in the 24 hours preceding the thunderstorms had softened the ground around this shallow-rooted tree.

Flood in COCHISE, ARIZONA
From 27-NOV-19 20:00:00 to 28-NOV-19 04:00:00 (MST-7)
Location: NACO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Around one inch of rain fell in southern Cochise County during the afternoon of November 27th with a total of 2 to 3 inches of rain by midnight.  By mid evening, several roads became impassable. This included Davis Road, King's Highway north of Route 80 and Frontier Road at Double Adobe. Route 80 was closed west of the Mule Pass Tunnel due to a rock slide.

Flood in COCHISE, ARIZONA
From 28-NOV-19 08:00:00 to 28-NOV-19 15:00:00 (MST-7)
Location: HEREFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread rain of 2 to 4 inches fell along the San Pedro River in southern Cochise County and upstream in Sonora on November 27th into the 28th, causing the river to rise markedly on the morning of November 29th.  The river neared flood stage at Palominas, but did not come out of its banks.  Farther downstream, the San Pedro River flooded Hereford Road on the east side of the bridge, but did not over top the bridge itself. However, the road was closed for several hours.

High Wind in UPPER SAN PEDRO RIVER VALLEY, ARIZONA
From 29-NOV-19 05:30:00 to 29-NOV-19 10:30:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High winds, aided by saturated ground from 2 to 3 inches of soaking rain during the preceding hours, uprooted several large trees in Sierra Vista. Winds also blew a gazebo over a brick wall and destroyed it.

Heavy Rain in COCHISE, ARIZONA
From 27-NOV-19 11:00:00 to 28-NOV-19 10:00:00 (MST-7)
Location: BISBEE
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Three inches of rain fell in Bisbee from midday on November 27 into the morning hours of November 28.  A day later, a retention wall failed as a result.  The debris from this failed wall caused the closure of a section of Shearer Avenue in Bisbee.