Copious amounts of tropical moisture from dissipating former tropical storm Ivo continued to stream into Arizona on August 24th, and this led to a very moist and unstable airmass. Thunderstorms with very heavy rain developed during the day, leading to flash flooding. A large convective complex brought rains in excess of 2 inches to northwest Maricopa county in the morning, which resulted in flash flooding in the Wickenburg area. The focus for convection turned to La Paz county during the afternoon; scattered storms formed and led to additional heavy rains and flash flooding which affected communties along the Interstate 10 corridor.

Heavy Rain in LA PAZ, ARIZONA
From 24-AUG-13 06:30:00 to 24-AUG-13 09:30:00 (MST-7)
Location: WENDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Significant amounts of tropical moisture continued to spread into southern Arizona during the morning hours on August 24th, and this led to a very moist and unstable airmass. Scattered thunderstorms with locally heavy rain developed and moved into La Paz county after about 0630MST, and led to flooding of area roads and washes. Some of the areas hit the hardest were the Highway 60 and Interstate 10 corridors to the east of Brenda. A Small Stream Flood Advisory was issued for central La Paz county beginning at 0628MST and it continued through 0930MST. According to a trained spotter located about 2 miles northwest of Wenden, 1.2 inches of rain fell in a 30 minute period ending at 0715MST and it was still raining hard.

Flash Flood in MARICOPA, ARIZONA
From 24-AUG-13 04:00:00 to 24-AUG-13 10:00:00 (MST-7)
Location: WICKENBURG MUNI ARPT
Flood cause: Heavy Rain / Tropical System
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

On August 24th, copious amounts of tropical moisture continued to spread into Arizona ahead of dissipating former tropical storm Ivo. This led to a very moist and unstable airmass, and scattered showers and thunderstorms developed during the early morning hours across portions of northwest Maricopa county, affecting the area around Wickenburg. Heavy rain began to fall from Aguila to Wickenburg beginning around 0400MST, and it continued to fall into the middle of the morning as a large convective complex developed. A flood advisory was issued for the area at 0524MST, and it was upgraded to a Flash Flood Warning at 0553MST. The warning remained in effect until shortly after 1000MST. According to the Wickenburg Fire Department and Rescue units, at 0730MST the Vulture Mine Road was closed around the Sols Wash due to high water. This was about 1 mile to the northwest of Wickenburg. At the same time, they reported that Rincon Road near Martinez Wash was also closed due to high water; this was about 2 miles north of Wickenburg.

Flash Flood in LA PAZ, ARIZONA
From 24-AUG-13 08:45:00 to 24-AUG-13 13:30:00 (MST-7)
Location: BRENDA
Flood cause: Heavy Rain / Tropical System
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Copious amounts of tropical moisture continued to flow into southern Arizona on August 24th, and this led to a very moist and unstable airmass. Scattered thunderstorms developed across much of La Paz county during the middle of the morning and they produced very heavy rain with rain rates in excess of 2 inches at times. The heavy rain affected both Highway 60 and Interstate 10 east of Brenda, and led to flash flooding which continued into the early afternoon hours. Small stream flood advisories were issued for portions of northeast and central La Paz counties starting at 0630MST, and they were upgraded to Flash Flood Warnings at 0933MST. Flash Flood Warnings for central La Paz county continued until about 1345MST. According to reports from the public, at 1100MST water was flowing across Avenue 42E and numerous washes east of Brenda were running heavily.