A California grape growers association says the state’s 2013 yield topped four million tons, leaving the domestic wine industry with ample supply. But worries loom about this year’s crop, as California’s drought continues.

The Sacramento Bee reports Allied Grape Growers announced Wednesday that last year’s 4.05 million tons of grapes followed a record 4.3 million tons crushed in 2012.

Nat DiBuduo, the group’s president, warns that a prolonged drought could reduce 2014?s crop load and increase vine stress, damaging California’s $61 billion wine industry.

Local wine growers brought in high yields during the last harvest which came through the season with excellent weather.

In 2012, wine grapes brought in $91-million dollars in Santa Barbara County.

The 2013 crop report will be presented to the Board of Supervisors in April.