Devastating, life-threatening floods have already started in some states as an atmospheric river causes heavy rainfall.
A weather system could bring catastrophic flooding across four states, beginning on Wednesday amid rounds of heavy rainfall.
NWS office in Paducah, Kentucky, in a flood watch: "Showers and storms through today produced 1 to 4 inches of rainfall ...
When a bomb cyclone meets an atmospheric river, the result is like an out-of-control fire hose A powerful storm hitting the West Coast combines these weather phenomena for a wet week in many areas.
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