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Summer monsoon rain over eastern New Mexico. The North American monsoon, variously known as the Southwest monsoon, the Mexican monsoon, the New Mexican monsoon, or the Arizona monsoon [1] is a term for a pattern of pronounced increase in thunderstorms and rainfall over large areas of the southwestern United States and northwestern Mexico.
Phoenix has a hot desert climate (Köppen: BWh), [1] [2] typical of the Sonoran Desert, and is the largest city in America in this climatic zone. [3] Phoenix has long, extremely hot summers and short, mild winters. The city is within one of the world's sunniest regions, with its sunshine duration comparable to the Sahara region.
The annual North American monsoon, which officially runs from June 15 to Sept. 30, is a notable weather phenomenon for the southwestern United States in any year.
In years when hurricanes approach Arizona, eastern and northern portions of the state receive on average 6–8% of the monsoon-season precipitation from tropical systems and their remnants. This percentage rises towards the southwestern corner of the state, which can receive up to a quarter of its monsoon-season rainfall from tropical cyclones. [4]
After a summer of extreme heat, Arizona’s most populous city is in the record books again. This time Phoenix is notching a record for dry heat. The National Weather Service said Sunday that the ...
Following the driest monsoon season on record in 2020, one of the wettest monsoons on record across the Southwest occurred in 2021. 'Normal to above normal rain' expected for Arizona monsoon ...
The North American monsoon is known to many as the Summer, Southwest, Mexican or Arizona monsoon. [47] [48] It is also sometimes called the Desert monsoon as a large part of the affected area are the Mojave and Sonoran deserts.
The clock is ticking on the North American monsoon and the annual shift of winds that transport moisture into the western U.S. Vehicles in the Phoenix metro area navigate a flooded street that ...