Deep moisture, some of it tropical in nature, interacted with a pair of upper level low pressure systems and led to the development of widespread rain and isolated thunderstorms across south-central Arizona during the evening hours on the 20th. Some of the heaviest rain, with measured storm total rainfall amounts generally around 2-4 inches, occurred over higher terrain east of Phoenix including the Woodbury burn scar. Banding and training of storms led to higher rainfall amounts in a shorter period of time, accelerating flash flood impacts across the burn scar. As an example of the flash flooding that occurred, at about 1930MST the public reported a rise of 15 feet along Campaign Creek about 10 miles to the southeast of Roosevelt. The heavy flow washed away an out-building in the area.

Flash Flood in MARICOPA, ARIZONA
From 20-NOV-19 18:50:00 to 20-NOV-19 22:45:00 (MST-7)
Location: TORTILLA FLAT
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Deep moisture, some of it tropical in nature, interacted with a pair of low pressure systems to produce widespread moderate to heavy rain across the high terrain east of Phoenix during evening hours on November 20th. The heavy rain resulted in episodes of flash flooding that impacted the Woodbury burn scar area. According to a report from the public, at 1930MST flash flooding resulted in a rise of 15 feet along upper Campaign Creek, about 10 miles to the southeast of the town of Roosevelt. The heavy flow washed away an out-building in the area. There were no reports of injuries due to the flash flooding, fortunately.

Flash Flood in MARICOPA, ARIZONA
From 20-NOV-19 18:50:00 to 20-NOV-19 22:45:00 (MST-7)
Location: TORTILLA FLAT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Deep moisture, some of it tropical in nature, interacted with a pair of low pressure systems to produce locally heavy rain across the high terrain east of Phoenix during the evening hours on November 20th. The heavy rain resulted in episodes of flash flooding that impacted the Woodbury burn scar and areas near the scar. At about 2000MST, a public report was received that described a rapid rise of water and out of the bank flooding along Lewis and Pranty Creek below the Woodbury fire's burn scar. A bit later, at 2025MST, a mesonet gage on Fish Creek located 5 miles east of Tortilla Flat reported a rapid rise of over 4 feet. The USGS stream gage was located below the Woodbury fire burn scar. Fortunately there were no reports of injuries due to the flash flooding.

Flash Flood in GILA, ARIZONA
From 20-NOV-19 19:00:00 to 21-NOV-19 01:00:00 (MST-7)
Location: ROOSEVELT GRPVN ARPT
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Scattered to numerous showers, along with embedded thunderstorms, developed to the east of Phoenix during the late afternoon and evening hours on November 20th. Rainfall was heavy at times with peak rain rates over 1 inch per hour, and this led to some flash flooding that affected the far eastern portion of Maricopa County as well as Apache Junction. Flash flooding even occurred over portions of the Woodbury burn scar area. According to a local emergency manager, flood waters from an engorged Campaign Creek flowed into and flooded a home along Ash Street in the Roosevelt Estates, located about 8 miles southeast of Roosevelt. Water was seen to be upwards of 9 inches along the sides of the house, and ash from the Woodbury burn scar area was present in the floodwaters. Fortunately there were no reports of injuries.