Day 355: Atmospheric River

Day 355

As I mentioned last night, a very moist airmass is moving through the western United States. Tonight’s image is a precipitable water image of the eastern Pacific Ocean. Notice the higher returns from the central Pacific Ocean extending eastward into southern California. This sliver of higher precipitable water values extending northward is known as an “atmospheric river“. This atmospheric river is bringing copious amounts of moisture northward into southern California and is aiding the impressive precipitation totals out west!