Hurricane Rosa upgraded to category 4


Hurricane Rosa was expected to make landfall in Mexico on Monday or Tuesday.

The center of the Category 3 storm was 625 miles southwest of the southern tip of Baja California, the NHC said in its 2 p.m. PDT update.

Cooler waters and drier air will continue to weaken the storm as it travels over northern Mexico and hits the southwestern portion of the state.

The best chance for rain in Mohave County is late Sunday night into early Monday morning.

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The National Weather Service announced flash flood watches through Tuesday for areas including southern Nevada, southeast California, southwest and central Utah and the western two-thirds of Arizona.

Moisture from Hurricane Rosa will lead to the possibility of record rainfall and flash flooding next week. The storm is expected to become a tropical depression Friday night and degenerate into a low pressure trough by late Saturday.

Rosa is out there.

It's then expected to move quickly northwestward as it weakens, bringing 2 to 4 inches of rain to the Mogollon Rim of Arizona and 1 to 2 inches to the rest of the desert Southwest, Central Rockies and Great Basin. Blowing dust will be possible this afternoon/evening. The hurricane center also warned of heavy rains for St. Croix and Puerto Rico, which was badly damaged by Hurricane Maria a year ago and is still recovering from the storm. The site urges people to prepare an emergency kit in advance of a flood in case access to electricity, fresh food or running water is temporarily unavailable.