How’s this for a fast start to monsoon season: Tucson, Arizona recorded its wettest July on record, and its wettest month overall in over 60 years.
Tucson saw 6.80″ of rain in July 2017, making it the wettest July on record and the second-wettest month overall, with the number one slot coming all the way back in August of 1955.
In fact, for Tucson, the total July rainfall eclipsed what the city usually sees for the full monsoon season (around six inches), which runs from June 15th through September 30th.
The monsoon took over fast and quick in southeast Arizona, leading to numerous flash flood events and an unusually high number of bouts of heavy rainfall. A persistent monsoon pattern funneled plenty of moisture into southern Arizona overall, but plenty of other spots in the Grand Canyon State picked up their fair share of moisture.
Other Arizona locations saw busy Julys as well, including the town of Payson.
The monsoon is caused by the intense heating of the desert Southwest during the late spring and early summer, creating an area of low pressure that helps draw in moisture from the Gulf of Mexico. Those monsoon events, as evidenced in Tucson so far this summer, can lead to torrential, tropical downpours on desert regions, acting as a key source of annual rainfall, but also leading to the possibility of significant flooding.
Stay with WeatherNation through the continuation of an already record-setting monsoon season.
For WeatherNation: Meteorologist Chris Bianchi