Afternoon Tempests in Arizona

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The monsoon season in the desert Southwest typically runs from late June through September, bringing a dramatic shift in weather patterns to regions like Arizona, New Mexico, southern Utah, and parts of Nevada. During this time, moist air from the Gulf of California and the Gulf of Mexico moves into the arid desert landscape, fueling afternoon thunderstorms and sudden downpours. 

These storms often develop quickly, producing heavy rain, flash floods, strong winds, and spectacular lightning displays. Dust storms, or haboobs, are also a frequent occurrence as winds from outflow boundaries lift desert soil high into the air. Despite the hazards, monsoon rains are vital for replenishing groundwater, supporting desert flora and fauna, and providing relief from the scorching summer heat.

Residents and travelers are advised to stay alert during monsoon season, avoid low-lying flood-prone areas, and heed weather warnings, as conditions can change rapidly in the desert Southwest.

This image was made near Sedona, where there are big buildups of clouds almost every summer afternoon.