Isolated to scattered thunderstorms developed across portions of the south-central deserts during the evening hours on July 8th. Conditions were favorable for the formation of strong, gusty and damaging microburst winds and indeed, a number of storms mainly west of central Phoenix produced wind gusts in excess of 50 mph. Trained spotters, media and public callers reported damage to trees and various structures such as mobile homes. Strong microburst winds near the town of Buckeye flipped two semi-trucks on Interstate 10 and also damaged some mobile homes. Flash flooding was reported east of Gila Bend along highway 238; according to a report from the public, several motorists were trapped between flooded washes. A variety of Severe Thunderstorm and Flash Flood Warnings were issued during the course of the evening as well as a number of Significant Weather Advisories.

Thunderstorm Wind in MARICOPA, ARIZONA
From 08-JUL-18 21:00:00 to 08-JUL-18 21:00:00 (MST-7)
Location: VALENCIA
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Isolated high based thunderstorms developed over the central deserts west of Phoenix during the middle of the evening on July 8th, and one of the stronger storms generated gusty outflow winds estimated to be as high as 60 mph. According to a trained weather spotter, at 2100MST strong and gusty crosswinds overturned two semi trailer trucks on Interstate 10 between Verrado Road and Highway 85. This was approximately 4 miles north of the town of Buckeye. The time is estimated based on radar information. No injuries were reported to either of the drivers.

Thunderstorm Wind in MARICOPA, ARIZONA
From 08-JUL-18 21:00:00 to 08-JUL-18 21:00:00 (MST-7)
Location: BUCKEYE MUNI ARPT
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Isolated thunderstorms developed over the western portion of the greater Phoenix area during the middle of the evening on July 8th. Atmospheric conditions were favorable for strong and gusty downdrafts, and one of the stronger storms produced locally strong microburst winds estimated to be in excess of 60 mph. According to a report from local broadcast media, at 2100MST a microburst hit a small area located about 3 miles north of the Buckeye Municipal Airport. Wind gusts estimated to be upwards of 65 mph completely demolished a few trailers which were located just west of Sun Valley Parkway and north of Interstate 10. Fortunately, no injuries were reported due to the wind damage.

Thunderstorm Wind in MARICOPA, ARIZONA
From 08-JUL-18 21:10:00 to 08-JUL-18 21:15:00 (MST-7)
Location: WITTMANN
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Isolated thunderstorms developed during the evening hours over the central deserts northwest of Phoenix; the stronger storms generated gusty damaging outflow winds estimated to be as high as 60 mph. According to a trained weather spotter located 9 miles southwest of the town of Wittmann, gusty winds downed 3 trees. The largest tree was 16 inches in diameter and 30 feet tall. The root system was about 5 feet in diameter and 3 feet deep. The downed trees were near the Copper Canyon Golf Club, north of Sun Valley Parkway.

Thunderstorm Wind in MARICOPA, ARIZONA
From 08-JUL-18 22:25:00 to 08-JUL-18 22:30:00 (MST-7)
Location: GILA BEND
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Isolated thunderstorms developed over the central deserts west of Phoenix during the evening hours on July 8th, and some of them produced gusty and damaging outflow winds that were at least 50 mph in strength. According to a trained weather spotter in Gila Bend, gusty outflow winds downed power lines and uprooted a tree in the town of Gila Bend. The downed power lines caused about half of the town to lose power as well as landline telephone service. No injuries were reported due to the downed lines.

Thunderstorm Wind in MARICOPA, ARIZONA
From 08-JUL-18 21:00:00 to 08-JUL-18 21:30:00 (MST-7)
Location: VALENCIA
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Isolated thunderstorms developed in the central deserts west of Phoenix during the late evening hours on July 8th and some of the stronger storms affected the town of Buckeye. Gusty outflow winds in the area downed trees as well as power lines. According to a trained weather spotter located 2 miles northeast of Buckeye, at 2100MST gusty winds estimated to be as high as 60 mph uprooted two Palo Verde trees with bases around 8 inches in diameter. The downed trees were near the intersection of Baseline Road and Miller Road. Thirty minutes later, local broadcast media reported that gusty winds downed power lines about 3 miles west of Buckeye. The downed lines resulted in power being lost to about 14,000 people. No injuries were reported due to the downed power lines.

Flash Flood in MARICOPA, ARIZONA
From 08-JUL-18 22:15:00 to 09-JUL-18 04:00:00 (MST-7)
Location: BOSQUE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with very heavy rain developed across the central deserts, to the southwest of Phoenix and down into the Gila Bend area, during the late evening hours on July 8th. The heavy rains caused areas of flash flooding east of Gila Bend, impacting motorists on State Route 238 all the way east to the county line. According to a report from the public, at 2306MST a number of motorists were stranded on State Route 238 between some flooded washes in the area. The motorists were about 11 miles northeast of Gila Bend. About one half hour later, the Arizona Department of Highways reported that State Route 238 was closed due to water over the road. One portion of the road that was flooded was near the town of Mobile. A Flash Flood Warning was issued for the area at 2209MST and it remained in effect through 0400MST the following morning. No injuries were reported due to the flash flooding.