Update 5:40 p.m. Flash flooding remained likely in and downstream of the Forest Falls area north of the San Gorgonio Pass, National Weather Service forecasters advisedbefore 6 p.m.
"Fire rescue officials reported portions of Valley Falls Drive being closed due to waters from Clarks Creek and Prospect Creek flowing over the road," the Weather Service stated in a flash flood warning update.
Radar estimates indicated 3 to 5 inches of rainfall over the Forest Falls-Mill Creek Canyon area.
"Heavy flows and debris are likely to continue through Mill Creek as heavy rains continue to run-off from the mountain slopes," the Weather Service advised. Posted 4:59 p.m. As of 4:30 p.m. Thursday Aug. 29 radar showed heavy rains diminished over Forest Falls and Big Bear north of the San Gorgonio Pass, according to the National Weather Service.
But mud and debris was reported on parts of Valley of the Falls Drive, and forecasters warned motorists Highway 38 in Mill Creek Canyon could also be impacted.