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Alaska's Sky Explodes With Swirling Clouds and a Hidden Polar Storm
https://scitechdaily.com/alaskas-sky-explodes-with-swirling-clouds-and-a-hidden-polar-storm/
Clouds line up, curl, and spin over the Gulf of Alaska in this image, acquired on March 19, 2026, by the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA's Terra satellite. Credit: NASA Earth Observatory/Michala Garrison
Southern Alaska closed out the winter of 2026 with a burst of cold, snow, and dramatic weather patterns visible from space. Along parts of the coast, temperatures stayed below normal while rounds of moderate to heavy snowfall swept through the region. Offshore, the atmosphere turned especially turbulent, creating striking cloud formations over the Gulf of Alaska.
Arctic Air Collides With Warmer Ocean Waters
On March 19, 2026, the last day of astronomical winter, a NASA satellite captured an extraordinary view of the scene unfolding over southern Alaska. According to a NOAA weather briefing, an area of low pressure over the Gulf of Alaska interacted with high pressure positioned across eastern Russia and northern Alaska. That combination funneled frigid Arctic air southeastward over the Alaska Peninsula.
As the cold, dry air moved across comparatively warmer ocean water, it began absorbing heat and moisture. This process produced long rows of clouds known as cloud streets, which appeared in parallel lines matching the direction of the wind. These formations develop when warmer air rises and condenses into clouds while cooler air sinks nearby, creating alternating bands of cloudy and clear skies.
The cloud development did not happen immediately. The air mass needed time over the ocean surface to gather enough warmth and moisture, which helps explain why areas nearest the coast remained mostly free of clouds. (Note that the hazy area close to shore might be stratus or sea fog.) Farther out over the gulf, the cloud streets evolved into open-cell clouds, which resemble delicate rings or wispy walls surrounding open spaces.
. . .
Arctic Air Collides With Warmer Ocean Waters
On March 19, 2026, the last day of astronomical winter, a NASA satellite captured an extraordinary view of the scene unfolding over southern Alaska. According to a NOAA weather briefing, an area of low pressure over the Gulf of Alaska interacted with high pressure positioned across eastern Russia and northern Alaska. That combination funneled frigid Arctic air southeastward over the Alaska Peninsula.
As the cold, dry air moved across comparatively warmer ocean water, it began absorbing heat and moisture. This process produced long rows of clouds known as cloud streets, which appeared in parallel lines matching the direction of the wind. These formations develop when warmer air rises and condenses into clouds while cooler air sinks nearby, creating alternating bands of cloudy and clear skies.
The cloud development did not happen immediately. The air mass needed time over the ocean surface to gather enough warmth and moisture, which helps explain why areas nearest the coast remained mostly free of clouds. (Note that the hazy area close to shore might be stratus or sea fog.) Farther out over the gulf, the cloud streets evolved into open-cell clouds, which resemble delicate rings or wispy walls surrounding open spaces.
. . .