Wind has surpassed hydro as most-used renewable electricity generation source in U.S.
In 2019, U.S. annual wind generation exceeded hydroelectric generation for the first time
Annual wind generation totaled 300 million megawatthours (MWh) in 2019, exceeding hydroelectric generation by 26 million MWh. Wind generation has increased steadily during the past decade, in part, because the Production Tax Credit (PTC), which drove wind capacity additions, was extended. Annual hydroelectric generation has fluctuated between 250 million MWh and 320 million MWh in the past decade, reflecting a stable capacity base and variable annual precipitation.
Annual changes in hydroelectric generation are primarily the result of variations in annual precipitation patterns and water runoff. Although weather patterns also affect wind generation in different regions, capacity growth has been the predominant driver of annual changes in wind generation.
Both hydroelectric and wind generation follow seasonal patterns. Hydroelectric generation is typically greatest in the spring when precipitation and melting snowpack increase water runoff. Seasonal patterns in wind generation vary across the country, but wind generation is usually greatest in the spring and fall.
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