LOS ANGELES — Rain and snow pounded huge swaths of California on Friday, forcing highway closures across the state and one major dam to open its spillway for the first time in nearly four years. Weeks of relentless snowfall has kept the state's transportation agency busy clearing roads of 45 million cubic yards of snow in the past month, enough to "fill more than 100 Rose Bowls," said California Department of Transportation Chief Deputy Director Mike Keever. A storm system on Friday dumped snow and rain across the Great Lakes, Northeast and Southeast with totals including 12 inches in Mequon, Wisconsin, 10 inches in Milwaukee, 9 inches in Woodstock, Illinois, and 4 inches around Detroit