Has the rain helped Lake Mead water level?

“It has some impact, but it's not very much. I don't think you would notice Lake Mead appreciably rising just from the results of big rainstorms,” Miller said. After years of mostly seeing its water levels fall, Lake Mead has steadily risen since April.



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Not exactly. The tropical storm brought nearly a monsoon season's worth of precipitation in just a few days. But that heavy rainfall likely had little effect on Lake Mead's water levels.

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“While the amount of precipitation received from the recent storms in the lower basin and from tributary inflows helps, the greatest source of water for Lake Mead is still from snow melt and flows from the upper basin — especially from good winter snowpack from the west slope of the Rocky Mountains,” Hendrix said.

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The water levels for Lake Mead are projected to reach slightly over 1,065 feet by January 2024, according to the Bureau of Reclamation, in large part due to an extremely wet winter that eased the effects of the longstanding drought. In October 2022, the water levels were at a historic low, at roughly 1,046 feet.

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After falling more than 27 feet since the start of the year, Lake Mead got a bit of a bump thanks in part to the August monsoon season. But in the face of a megadrought that has gripped the Southwest for more than two decades, the small uptick is a drop in the nation's largest bucket of water.

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Most of our rainwater travels untreated through gutters, storm drains, channels, washes and eventually into the major source of our drinking water - Lake Mead. All storm drains lead to lake mead. Stormwater that falls in the Las Vegas Valley picks up pollutants and travels untreated to Lake Mead.

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With intervening flows between Lake Powell and Lake Mead of 1.32 maf in CY 2023, Lake Mead's physical elevation is projected to be 1,065.42 feet on December 31, 2023. The WY 2023 unregulated inflow into Lake Powell in the August Probable Maximum inflow scenario is 13.75 maf, or 143% of average.

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Lake Mead water levels up after snowy winter, former Hurricane Hilary. Lake Mead water levels were at record low levels last summer but snow over the winter and former Hurricane Hilary helped restore some water to the basin.

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Lake Mead sees 'significant improvement' in water levels after drought led to disturbing discoveries. In October 2022, the water levels at the reservoir were roughly 1,046 feet.

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“While the amount of precipitation received from the recent storms in the lower basin and from tributary inflows helps, the greatest source of water for Lake Mead is still from snow melt and flows from the upper basin — especially from good winter snowpack from the west slope of the Rocky Mountains,” Hendrix said.

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What happens if Lake Mead dries up forever? If Lake Mead were to run out of water, the Hoover Dam would no longer be able to generate power or provide water to surrounding cities and farms. The Colorado River would essentially stop flowing, and the Southwest would be in a major water crisis.

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Lake Mead expected to have gained 20 feet of water by end of 2023. By the end of the year, the water level at Lake Mead is expected to be at least 20 feet higher than it was in January, according to a Bureau of Reclamation forecast released this week.

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Electricity would not just be the only thing lost. Without Lake Mead, Las Vegas would lose access to 90 percent of its water sources. If Lake Mead were to reach dead pool, it would technically still be able to supply drinking water to Las Vegas. But there will not be enough water for agricultural activities.

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Without Lake Mead, Las Vegas would lose access to 90 percent of its water sources. If Lake Mead were to reach dead pool, it would technically still be able to supply drinking water to Las Vegas. But there will not be enough water for agricultural activities.

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According to the LVVWD, the first straw, or intake one, will no longer work when the lake level falls below 1,050 feet (Lake Mead's water level is measured at an altitude above sea level).

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Studies show that a project like this would be possible, though it would take decades of construction and billions of dollars. Maybe even trillions.

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The Lake Mead problem could be resolved by draining Lake Powell and storing the water in Lake Mead. More than 5% of the water in the Colorado River evaporates off the surface of Lake Powell - which never should have been built.

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