Monsoon season in the Southwestern United States begins in mid-June and continues through September, with storms peaking between early July and mid-September.
Photogenic thunderstorms abound as they stretch across the region firing off localized sheets of rain, flashes of lighting and clashes of thunder. They are fueled by daytime heating and build up during the late afternoon early evening. Downpours often don’t last long, but the rainfall is heavy and can cause flash floods and debris flows capable of some pretty serious destruction. Trees, trails, boulders, and even cars and houses can be destroyed in a matter of minutes by these debris flows, which alter the landscape of the soft sedimentary-laden landscape that is typical of the desert southwest.