Dust Storm in Imperial County West, California

Visibility near zero was reported near Salton City. No accidents or injuries were reported.

A slow moving cutoff low was situated over southern Arizona, providing forced ascent. The low pressure resulted in very cold mid-level temperatures of -13C to -14C, which helped increase the instability with moderate to high levels observed (MLCAPE of 1000-2000 J/KG). High levels of moisture were also observed with PWAT ranging between 1-1.4, which is near record values for early October. The combination of all of these factors led to the development of strong to severe thunderstorms, developing initially across far southwestern Arizona during the early afternoon hours and then moving westward into Imperial County as the afternoon progressed. A well-organized outflow boundary surged well ahead of the thunderstorm complex, resulting in dense blowing dust, which traversed westward across the Imperial Valley and into the Salton Sea area. The blowing dust activity reached as far north as Joshua Tree National Park. Thunderstorms that moved into Imperial County resulted in areas of Flash Flooding along Ogilby Road.