Dust Storm in Gila River Valley, Arizona

Visibility of 1/4 mile in blowing dust from thunderstorm outflow new Tacna. No accidents or injuries were reported.

An inverted trough at 700 mb moved across southern Arizona and with sufficient instability and moisture in place with MLCAPE of around 1000 J/KG and PWAT values of between 1.3 and 1.6 inches, widespread thunderstorm activity was observed across most of south-central and southwest Arizona. Storms first developed across the higher terrain north and east of Phoenix as well as across portions of southern Maricopa County during the early afternoon hours. These storms sent two outflow boundaries from opposing directions, which then collided across the Phoenix metro, sparking the development of additional storms over the Phoenix area. Another cluster of storms then developed across portions of southwest Arizona during the late afternoon into the early evening hours. No damages or injuries were reported.