Southwest Monsoon

Southwest Monsoon

Every summer, by the end of June or early July the Monsoon develops into Arizona and adjacent regions, bringing higher humidities and thunderstorms. Periodically during the summer months, monsoon moisture moves as far north as Star Valley. This is usually when Star Valley experiences summer thunderstorms along with flash flooding potential, lightning, and damaging winds. 

The Las Vegas Weather Forecast Office has produced a good video on the Monsoon and what to expect.

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