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Historic El Niño: Drought Relief for West?
11 Oct
Summary
- A strong El Niño may bring more rain to the Colorado River Basin.
- Reservoir levels are currently at historic lows.
- Increased precipitation might not fill reservoirs due to dry soil.
A potentially historic El Niño is expected to deliver wetter conditions across parts of the United States this winter. This event raises hopes for some relief in the drought-stricken Colorado River Basin, where major reservoirs have reached record lows. Federal forecasters indicate a high probability that this El Niño will exceed the strength of previous events dating back to 1950.
While increased precipitation and mountain snowfall could benefit the Colorado River system, experts express uncertainty about substantial gains for Lakes Mead and Powell. These reservoirs, vital for supplying water to tens of millions, were at critically low levels as of August 2026.
Experts note that even with above-average snowfall, dry soil conditions in the basin may absorb much of the meltwater and rain, hindering runoff into the reservoirs. Additionally, water management decisions and the potential for water retention in upstream reservoirs like Lake Powell can affect levels in Lake Mead. The long-term impact remains uncertain, with a possibility of reservoirs returning to pre-El Niño levels if storm tracks do not persist.
