An atmospheric river takes aim at the west coast, driven by a large low-pressure system over the north Pacific Ocean. Details: This animation contains the mid-level water vapor (band 9) product from the GOES-18 weather satellite. It spans the twelve-hour period from 06:01 UTC to 17:56 UTC on 2025-11-04. | Cooperative Institute for Research in the Atmosphere

Above the Grand Canyon, a rare formation of undulatus asperatus clouds took shape .. their wave-like patterns illuminated by the warm light of sunset, creating an atmosphere that looked almost surreal. The dramatic appearance comes from layers of air moving at different speeds and directions, producing these rolling textures across the sky. As sunlight passed through varying densities of moisture and cloud thickness, it created the illusion of a rippling, shifting ceiling overhead. Dozens of onl