Scattered thunderstorms developed across portions of the south central Arizona desert during the afternoon and evening hours on August 27th. The atmosphere was very moist and unstable, and as a result the thunderstorms were able to generate a wide variety of weather, including strong gusty winds, large hail and locally heavy rain. Most of the thunderstorms affected the area between Gila Bend and Casa Grande.

Thunderstorm Wind in PINAL, ARIZONA
From 27-AUG-13 16:30:00 to 27-AUG-13 17:37:00 (MST-7)
Location: STANFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office

Thunderstorms with strong gusty winds developed across portions of the south central Arizona deserts during the late afternoon hours on August 27th. Although no damage was reported due to the strong winds, there were multiple reports of gusts reaching at least 60 mph in strength. At 1630MST, a local post office in Stanfield estimated a peak gust to 60 mph. The wind created locally dense blowing dust which lowered visibility below one mile. At 1737MST, a trained weather spotter 15 miles southwest of the town of Maricopa estimated wind gusts of 60 mph at the intersection of North Warren and West Miller roads. The spotter also reported pea sized hail.

Hail in PINAL, ARIZONA
From 27-AUG-13 17:44:00 to 27-AUG-13 17:44:00 (MST-7)
Location: STANFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms, some with large hail, developed across portions of northwestern Pinal county during the afternoon hours on August 27th. A trained weather spotter located 8 miles to the southwest of Ak-Chin Village reported dime to quarter sized hailstones along with locally heavy rainfall. He measured some of the larger hailstones at 1 inch diameter and also measured 0.54 inches of rain in a 15 minute period.

Thunderstorm Wind in PINAL, ARIZONA
From 27-AUG-13 17:40:00 to 27-AUG-13 17:44:00 (MST-7)
Location: STANFIELD
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed during the late afternoon hours across portions of northwest Pinal county on August 27th, and they produced gusty and damaging winds which affected Ak-Chin Village. A trained weather spotter 8 miles southwest of Ak-Chin Village reported that strong wind gusts and heavy rain blew down part of a porch roof. The winds were estimated to be in excess of 60 mph. Hail as large as 1 inch in diameter accompanied the strong winds. A Severe Thunderstorm Warning was in effect for the area starting at 1723MST and continuing until 1800MST.

Flash Flood in MARICOPA, ARIZONA
From 27-AUG-13 18:42:00 to 27-AUG-13 19:30:00 (MST-7)
Location: ESTRELLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorms developed across the central Arizona deserts during the evening hours on August 27th, and they produced locally heavy rainfall which impacted the area between Gila Bend and the town of Maricopa. Due to the heavy rain, A Flash Flood Warning was issued for the area at 1842MST. At 1915MST, the Arizona Department of Highways reported that Highway 238 was closed between Gila Bend and Maricopa due to water flowing across the highway. The location of the report was about 3 miles southwest of the town of Mobile. The Flash Flood Warning was later cancelled at 1930MST as the rainfall had rapidly diminished.