Hurricane Rosa won't be a hurricane by the time it reaches the Southwest, but the storm will bring heavy rain to Arizona, Southern California and Nevada early next week.Rosa is weakening Saturday morning with maximum sustained winds of 100 mph. Additional weakening is expected over the weekend and Rosa will likely become a tropical storm by Sunday or Monday. The storm was located 625 miles south-southwest of Punta Eugenia, Mexico, and moving north at 9 mph as of 5 a.m.The storm will continue in this direction Saturday, before turning northeast on Monday . . .