The National Weather Service in San Diego has issued a flash flood warning for west-central Riverside County. It is in effect until 7:15 p.m.
According to CHP, the area around State Route 243 and Twin Pines experienced the worst of it, with minor mudslides reported, plus water and debris in the roadway.
Updates below . . .
UPDATE (5:28 p.m.) - HWY 243 has been reopened.
UPDATE (5:20 p.m.) - Firefighters have responded to reports of "significant flooding" in the area of the Silent Valley RV Park in the community of Poppet Flats.
UPDATE (4:45 p.m.) - CHP has shut off State Route 243 at around 4:45 p.m. due to flooding in the mountain area.