The monsoon stirred up dust, dumped rain and sparked a slew of weather warnings and advisories on Sunday.
Storms began brewing in the Tucson area earlier in the day and prompted a flash flood warning for west-central Pima County.
Central Maricopa County was under an hour-long severe thunderstorm warning late in the afternoon.
Forecasters had detected a severe thunderstorm capable of producing penny-size hail and damaging winds in excess of 60 mph near White Tank Mountain Park, or eight miles southwest of Waddell.
The storm cut power to 639 Arizona Public Service customers in Surprise.
East central Maricopa County had been under a blowing dust advisory for a time.
A dust storm warning expired for northwest and north central sections of Pinal County. Earlier, communities like Casa Grande, Maricopa, Coolidge and Florence were on alert for the passing storm.
During dust storms, safety officials remind motorists that if they see dense dust blowing across a roadway then they should pull their vehicle off the pavement as far as possible to stop. Turn off the lights, set the emergency brake and motorists should take their foot off the brake pedal to ensure the brake lights are not illuminated.
Persons with respiratory problems should stay indoors until the storm passes.
On Saturday, a dust storm blanketed the greater Phoenix area. Weather spotters estimated it was about 2,000 feet tall.
Stay with cbs5az.com and CBS 5 News for updates on this developing story.
Copyright 2012 CBS 5 (Meredith Corporation). All rights reserved.
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