NAPA VALLEY -- Mumm Napa, a sparkling-wine producer often among the first in the North Coast to pick grapes, plans to bring in its first loads of Napa Valley grapes Thursday.

The winery expects the two truckloads of grapes are set to be picked at daybreak that morning from the Game Farm vineyard in the middle of the valley, according to a spokeswoman.

Grapes for sparkling wine are harvested at lower sugar levels than those for table wine. Grapes for the latter are picked roughly a month later, which would be around Labor Day.