The atmosphere across southern Arizona was exceptionally moist and unstable on July 18th, due in large part to a significant infusion of tropical moisture from hurricane Dolores. As a result, scattered thunderstorms developed during the afternoon over south central Arizona and they persisted into the evening hours. Some of the storms became very strong and developed damaging winds, knocking down power poles near Morristown. During the evening, torrential rain developed in the community of Wickenburg, leading to significant flooding and flash flooding. Many rain gages reported over 3 inches of rain in a short period near Wickenburg. Fortunately no injuries were reported due to the flooding. A Flash Flood Watch was in effect for the area through 2300MST.

Flash Flood in GILA, ARIZONA
From 18-JUL-15 17:30:00 to 18-JUL-15 22:30:00 (MST-7)
Location: STRAWBERRY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Department of Highways

Scattered strong thunderstorms developed across northwest Maricopa county during the afternoon hours on July 18th. Due to a significant infusion of tropical moisture from hurricane Dolores, the storms produced torrential rainfall with peak rain rates well in excess of 3 inches per hour; one of the communities that was especially hard hit by the heavy rain was Wickenburg. Heavy rain in the Wickenburg area began around 1630MST and continued through the evening hours; many flood control district rain gages in the area reported storm total rainfall amounts ranging from 3 inches to nearly 4.5 inches. The excessive rainfall led to episodes of flash flooding; according to the Department of Highways, at 1805MST U.S. Highway 60 was closed at milepost 111 due to the fact that the road was flooded and impassable. Earlier, at 1742MST a trained spotter 1 mile southeast of Wickenburg reported 2 inches of rain measured in 30 minutes which flooded area roadways. Additionally, another spotter 2 miles southwest of Wickenburg reported Cemetary Wash running with very heavy rapids and water was reported to be 2 inches deep across the front yard of some homes. At 1746MST heavy rain caused the Casandro Wash to rise to 6.7 feet which is above flood stage. Fortunately, no injuries were reported due to the flash flooding.

Flash Flood in MARICOPA, ARIZONA
From 18-JUL-15 16:30:00 to 18-JUL-15 20:00:00 (MST-7)
Location: WITTMANN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms developed across the northwest portions of the greater Phoenix metropolitan area during the afternoon hours on July 18th; due to an infusion of tropical moisture from hurricane Dolores the stronger storms produced very intense rainfall with peak rain rates above 2 inches per hour. The heavy rain led to both urban and flash flooding in the area around Circle City. At about 1700MST, the public reported that 3 to 6 inches of rain was flowing over the roads from heavy rain, about 6 miles southwest of Circle City. Cars were unable to pass due to the swiftly flowing water. Initially, at 1701MST, an Urban and Small Stream Flood Advisory was issued for the area and this was upgraded to a Flash Flood Warning at 1756MST.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-JUL-15 16:30:00 to 18-JUL-15 16:40:00 (MST-7)
Location: MORRISTOWN
Magnitude: 65.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorms developed over south central Arizona during the afternoon hours on August 18th, and due to a significant infusion of tropical moisture they became very intense and produced gusty and damaging outflow winds. Some of the storms affected communities such as Morristown. According to a trained weather spotter located about 1 mile southeast of Morristown, gusty winds estimated to be in excess of 60 mph downed several power poles at 1640MST. At about the same time, local law enforcement reported that 2 miles of power poles were blown down 1 mile northwest of Morristown and that US 60 had been closed between milepost 122 and 124 due to the downed poles.