It's rare for a hurricane or tropical storm to impact the southwestern U.S., but CNN meteorologist Gene Norman says, "These events have begun to increase in recent years".
The best chance for rain in Mohave County is late Sunday night into early Monday morning.
High surf up to 10 feet and rip currents will begin along southern California coast Sunday, the hurricane center said.
Heavy rainfall is expected across the Baja peninsula as well as the southwestern United States, with the potential for life-threatening desert flash flooding and mountain landslides, the hurricane center said.
Rosa still had maximum sustained winds of 75 mph Sunday morning, and it was centered about 320 miles southwest of Punta Eugenia in Mexico.
Later next week, Hurricane Rosa is expected to weaken into a tropical depression as it passes over California, Nevada, Arizona, New Mexico, Utah and Colorado. Forecasters say up to 4 inches could fall in some areas through Wednesday, including Flagstaff, Payson, Prescott and the Grand Canyon's South Rim. Some areas could get up to 6 inches.
Hurricane Rosa, packing Category 3 winds, moved Friday off Mexico's Pacific coast, with forecasters expecting its swells to affect the Southern California surf this weekend.