If a roof in Los Angeles pools water, it is bad news with 1-2 inch/rain per hour. Usually it is some roofer crew that leaves crap up there before the store that plugs the drain/gutters.
You might want to get a Snow Emergency thread running for the Northwest. Gonna stay bad for at least a week or two, probably longer. Problems in Eastern Washington, Northern Idaho, Oregon Cascades, Eastern Oregon and Utah. Snow levels may eventually get to critical levels in the Sierras and Colorado Rockies. National guards being called for in Oregon and Idaho. States of emergency in Idaho and Washington counties. I would imagine that Nor Cal has also gotten hammered.