Covelo AVA
Encyclopedia
The Covelo AVA is an American Viticultural Area
American Viticultural Area
An American Viticultural Area is a designated wine grape-growing region in the United States distinguishable by geographic features, with boundaries defined by the Alcohol and Tobacco Tax and Trade Bureau , United States Department of the Treasury....

 located in northern Mendocino County
Mendocino County, California
Mendocino County is a county located on the north coast of the U.S. state of California, north of the greater San Francisco Bay Area and west of the Central Valley. As of the 2010 census, the population was 87,841, up from 86,265 at the 2000 census...

, California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. Although the region only has 2 acre (0.809372 ha) under vine, it was granted AVA status by the United States Department of the Treasury
United States Department of the Treasury
The Department of the Treasury is an executive department and the treasury of the United States federal government. It was established by an Act of Congress in 1789 to manage government revenue...

 Alcohol and Tobacco Tax and Trade Bureau
Alcohol and Tobacco Tax and Trade Bureau
The Alcohol and Tobacco Tax and Trade Bureau, statutorily named the Tax and Trade Bureau and frequently shortened to TTB, is a bureau of the United States Department of the Treasury....

 on February 16, 2006 based purely on the unique climate
Climate
Climate encompasses the statistics of temperature, humidity, atmospheric pressure, wind, rainfall, atmospheric particle count and other meteorological elemental measurements in a given region over long periods...

 conditions of the area. The appellation
Appellation
An appellation is a legally defined and protected geographical indication used to identify where the grapes for a wine were grown; other types of food often have appellations as well...

 is located 45 miles (72 km) north of Ukiah, California
Ukiah, California
The average high temperature is 73.5 °F . Average low temperature is 46.1 °F . Temperatures reach 90 °F on an average of 65.6 days annually and 100 °F on an average of 14.4 days annually. Due to frequent low humidity, summer temperatures normally drop into the fifties at night. Freezing...

 and includes the areas of Round and Williams Valleys. The area is relatively flat terrain built upon deep loam
Loam
Loam is soil composed of sand, silt, and clay in relatively even concentration . Loam soils generally contain more nutrients and humus than sandy soils, have better infiltration and drainage than silty soils, and are easier to till than clay soils...

 layers of soil. Unlike other areas in the California wine country, Covelo has a continental climate with the high peaks surrounding the valley shielding it from the influence of the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. The growing season here is one of the shortest in Mendocino County and the area experiences one of the widest diurnal temperature variation
Diurnal temperature variation
Diurnal temperature variation is a meteorological term that relates to the variation in temperature that occurs from the highs of the day to the cool of nights.-Temperature lag:Temperature lag is an important factor in diurnal temperature variation...

in the region.
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