Monsoon

monsoon

Arizona’s Monsoon

Photo courtesy of Philip Tarrant
Photo courtesy of Philip Tarrant

Arizona’s monsoon is the northern extent of the North American Monsoon, which begins in early June in central and southern Mexico.The monsoon is a season, during which the dry westerly winds that persist through fall, winter and spring shift to moist southerly winds, bringing thunderstorm activity into Arizona.

The monsoon activity accounts for roughly half the annual precipitation in central Arizona, and two-thirds to three-fourths of the annual precipitation in southern Arizona. The short-lived, intense thunderstorms often result in flash flooding in steep terrain, as well as urban flooding through low-lying roads and normally dry washes.

2021 Monsoon Review

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Basics of the Arizona Monsoon

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NWS Southern Arizona Dust Storm Workshops

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Phoenix Dewpoint Tracker
Monsoon daily dewpoint tracker for Phoenix

Tucson Dewpoint Tracker
Monsoon daily dewpoint tracker for Tucson

Phoenix Monsoon Statistics

Tucson Monsoon Statistics

Monsoon Tracking
Monsoon-tracker-thumb

Monsoon Literature

Long Term Changes of Transient Inverted Troughs Lahmers, et al