2015 was a below average vintage, per acre, in the Columbia Valley and its sub appellations. The vintage was quite warm, with little to no disease pressure at ripening, and the resulting quality was excellent.
With the light vintage in mind, large wineries bought up a high volume of 2015 bulk inventories in Washington, leaving a short supply of remaining 2015 bulk inventories.
Cabernet, Merlot, and Syrah from 2015 remains available for 2017 bottling schedules, but the general over supply, which leads into the summer should not be available in the coming calendar year.