An approximate annual rainfall of eighteen inches satisfies the requirements for grapevines, which produce better fruit under slightly stressful conditions. The huge Ogalala Aquifer which runs under the High Plains provides more than enough water if irrigation is necessary. Because of the area's low humidity, there are few mold, fungi or mildew problems. On occasion, thunderstorms drop rain which is quickly dried off the vines by the dry weather and the constant moving breezes. However, the appellation is not without its problems.
Hail storms can occasionally lighten crops and damage vines.
In addition, early and late season frosts do occur. Still, the quality of the grapes produced from the High Plains appellation have more than proven their quality. Llano Estacado wines have garnered numerous awards and medals in competitions of national and international scope. No one realized this area could produced world-class wines. It is an amazing story.