This illustrates the 'atmospheric river'. It's dissipated a bit, and is based on the low pressure system spinning counter-clockwise to the North, which is 'fetching' the river.
1,553 posted on 02/19/2017 4:33:37 PM PST by txhurl
(The LEFT are screaming at the Tsunami, and the Sky, trying to set fire to the Ocean- S.Tom)