Beam Global Spirits & Wine of Clermont, Ky., says it's all out of the aged bourbon.
It won't have anymore to sell until November.
Of course, Beam has plenty of other brands to sell, including Jim Beam and Maker's Mark.
The distiller's Kelly Doss notes Knob Creek is aged longer than many bourbons, so production must be predicted years in advance.
The Courier-Journal reports the shortage of Knob Creek isn't a total loss to the fans of the bourbon.
The company has sent "The drought of 2009" T-shirts to 16,000 people who registered on the brand's Web site.
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