RIVERSIDE (CNS) - A storm that produced rain and snow on Thanksgiving and the day before, causing flooding on roadways in Riverside County, significantly weakened Friday countywide.The highest precipitation total in the metropolitan areas of the county was a quarter-inch in Temecula, according to totals recorded by the National Weather Service since 1 a.m. In the mountainous areas of the county, the highest total was in the foothills near Hemet, also at a quarter-inch.However, a winter storm warning remains in effect until 10 p.m. tonight in the Riverside County mountains, where 2 to 3 inches of snow could still fall today, forecasters said.As of midnight Thursday, 14 to 18 inches of snow had fallen in Idyllwild, according to the weather service, with most of the accumulation a
