The second atmospheric river (AR) event is hitting the PNW as we speak. The last event was October 24th and hit the California coast, centered on San Francisco. This time it centered on Portland (16 days apart). Widespread precipitation along the northern Sierra mountains, and Cascades as this storm rages across the northern states.
We mentioned in an earlier post that this is the northern part of the pattern. This storm will track across the northern Rockies for the next few days. The northern pattern remains active with storm after storm for the next 2 weeks. The next storm to impact Utah and Colorado will begin around Nov 19.
More details coming soon! Mike