Lauren Intrieri and Jordan Evans

Monday, Oct. 1, 2018

Tropical Storm Rosa brings heavy rainfall, flash floods to Arizona

Video by Jordan Evans

PHOENIX – Heavy rainfall and flash flooding caused by Tropical Storm Rosa began Sunday evening in southern Arizona. Showers and thunderstorms are expected to last through Wednesday.

Rosa will make landfall later Monday along the coast of Baja California. Tuesday morning, the storm will make a second landfall as a tropical depression in Sonora, Mexico, about 100 miles south of Yuma. The National Hurricane Center says remnants of the storm are expected to move across central Arizona Tuesday and Wednesday, dropping rainfall amounts that could pose a flash flood threat to the rest of the state.

Central and southern Arizona, including parts of the West Valley, can expect 2 to 4 inches of rain from Rosa. Localized amounts in the high country could approach 6”+. Northern and southern Arizona can expect 1 to 3 inches.

The National Weather Service issued flash flood warnings for much of central and western Arizona and southeast California until 5 a.m. Wednesday. Drivers should avoid flooded roads, as it can take only 12 inches of rain to float a vehicle.


(Photo Courtesy of National Hurricane Center)

The valley should dry out by the end of the week. Temperatures are expected to stay below average heading into the weekend.

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