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Southerly Ocean Swell From Hurricane Rosa Expected to Produce Dangerous Surf

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Pacific Time, and was expected to reach Baja California on Monday as a tropical storm, as additional weakening was in the forecast over the next few days, the Miami-based center said.

Exactly how much rain and where it will fall is uncertain, but Riverside County's Emergency Management Department has warned residents near the Holy and Cranston wildfire burn areas that intense rain could cause risky debris flows.

Hurricane Rosa, in the eastern Pacific, on Thursday night was upgraded to a major category 4 hurricane with 125 miles per hour sustained winds. It was heading north at 13 miles per hour.

Moisture from Hurricane Rosa could cause flash flooding to Baja California, eastern California, Las Vegas and Arizona as it approaches the coast late Sunday.

The hurricane center said there were no coastal watches or warnings in effect, but swells generated by Rosa were expected to cause risky surf and rip current conditions along portions of southwestern Mexico, the peninsula and southern California.

Swells generated by Rosa are forecast to affect parts of the coastlines of southwestern Mexico, the southern Baja California Peninsula, and southern California late this week and over the weekend.

Surf from 6 to 10 feet is possible on Los Angeles and Ventura County beaches as early as Saturday night or Sunday, the National Hurricane Center said.

The rain could lessen as the storm moves toward Arizona, but it could also bring a small dust storm Sunday evening.