The weather has quieted down across California after last week’s soaking storm across the state. The setup involved several different factors that led to the significant rainfall event across the state, especially along the coast of northern and central California. For starters, a plume of moisture was observed extending from the tropics near Hawaii to northern California. This transport of high moisture content is referred to as a atmospheric river as I noted in the last blog and can be seen below. The persistent plume of moisture provided the fuel for the heavy rain.