Last week I was staying in Monterey, California attending the Cyclone Workshop, a regular gathering of meteorologists interested in midlatitude and tropical cyclones. The locals were all talking about the heavy rain that had struck central California for over two weeks in March when the jet had moved south over them (see upper level map below for a sample).
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Here is a video showing the failure.
The jet moved back up here during late March and they got warm and dry...and you know what happened here.
But those smug Californians are going to exchange places with us again in a few days! Take a look at the upper level chart for Thursday at 4 AM---a trough will drive the flow and rain into the palm-infested California climes.
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Here is the 24h rain ending 4 AM on Friday. We dry out and coastal CA gets soaked. But they will probably take refuge in their hot tubs.
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