![]() USBR announced in August 2021 that state water allocations would be cut in 2022 further modeling and negotiation is underway for 2023 allocations. The river water is allotted to states (including tribal lands) and Mexico through laws like the 1922 Colorado River Compact.Ībove Lake Mead, Lake Powell is currently filled to just 27 percent of capacity, and the entire Colorado river system stands at 35 percent. The Colorado River basin is managed by USBR and other agencies to provide electric power and water to roughly 40 million people-most notably the cities of San Diego, Las Vegas, Phoenix, Los Angeles-and 4 to 5 million acres of farmland in the Southwest. The phenomenon is often referred to as a “ bathtub ring.”Ībout 10 percent of the water in Lake Mead comes from local precipitation and groundwater each year, with the rest coming from snowmelt in the Rocky Mountains that flows down the Colorado River watershed through Lake Powell, Glen Canyon, and the Grand Canyon. The light-colored fringes along the shorelines in 20 are mineralized areas of the lakeshore that were formerly underwater when the reservoir was filled closer to capacity. The detailed images below also include a view from Landsat 8 on J(middle). The natural-color images above were acquired on July 6, 2000, and July 3, 2022, by Landsat 7 and Landsat 8. In Colorado, location of the headwaters of the Colorado River, 83 percent of the state is now in drought, and the snowpack from last winter was below average in many places. The low water level comes at time when 74 percent of nine Western states face some level of drought 35 percent of the area is in extreme or exceptional drought. It now also provides a stark illustration of climate change and a long-term drought that may be the worst in the U.S. The largest reservoir in the United States supplies water to millions of people across seven states, tribal lands, and northern Mexico. As of July 18, 2022, Lake Mead was filled to just 27 percent of capacity. As an example, December data will typically be posted sometime during the first week of January.Īny questions about this product should be directed to the CNRFC.Continuing a 22-year downward trend, water levels in Lake Mead stand at their lowest since April 1937, when the reservoir was still being filled for the first time. Note, monthly data is collected during the first week of the following month and will be posted to this webpage when received from the National Weather Service cooperative observers. In addition the percent of normal will not be calculated. If a station has any missing data, it's WY to Date total will also be missing. NA means that 30 year averages do not exist for this station. ![]() Precipitation data is provided for each month of the most recent water year, total precipitation for the water year, the percent of normal for the water year to date, and the percent of the entire water year we have received to date. The water year starts on October 1 of the previous reference year and ends on September 30 of the reference year. The following is data from National Weather Service cooperative observers as of the end of last month. Monthly Precipitation Summary Water Year 2023
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