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Water Surges Into Navajo Reservoir

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 11/11/2026, 05:50:24 UTC.

Briefings

NASA Earth Observatory documented a rapid rise in Navajo Reservoir levels from September 20 to November 7, 2026, as extreme rain events in the Four Corners region alleviated drought but triggered record flooding. The reservoir reached 108% of average capacity on November 7, contrasting with 60% on September 20, with water levels increasing nearly 60 feet (18 meters) over the period. The study utilized Landsat 9 OLI imagery and U.S. Army Corps of Engineers data, noting that snow drought in winter 2025-26 limited spring growth while wet weather drove river runoff. Public consequences include flooding in Pagosa Springs, Colorado, where 5.05 inches of rain caused major flood stage and evacuations, and widespread impacts across the Southwest. The event highlights the dual role of extreme weather in shifting water storage dynamics despite regional drought relief.

Key points

• Navajo Reservoir rose nearly 60 feet (18 meters) between September 20 and November 7, 2026, reaching 108% of average capacity on November 7.
• The rapid water level increase was driven by heavy rainfall in the Four Corners region, which alleviated drought conditions while triggering damaging floods.

Context

The study examines how extreme precipitation events in the Southwest altered water storage dynamics, contrasting drought relief with flood risks. Data from Landsat 9 and U.S. Army Corps of Engineers inform the analysis of reservoir changes during a period of record rainfall.

Limitations

Evidence is limited to Landsat 9 imagery and U.S. Army Corps of Engineers data; specific flood damage details are reported rather than measured. Long-term drought conditions persist despite short-term relief, and the study does not account for all contributing factors to water level changes.

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