NASA Captures Rare Arctic Storm Over Alaska, Highlighting Unstable Weather Patterns
NASA's Earth Observatory has captured a striking image of a rare arctic storm over Alaska, marking the end of winter 2026 with dramatic weather conditions. On March 19, 2026, a NASA satellite documented the atmospheric instability over southern Alaska, where colder-than-average temperatures and heavy snowfall were prevalent. The storm was characterized by 'cloud streets,' long parallel bands of clouds formed as cold, dry air from the Arctic moved over the warmer waters of the Gulf of Alaska. This phenomenon occurs when the air picks up heat and moisture from the ocean, creating clouds as warmer air rises and cooler air sinks. Additionally, the satellite captured von Kármán vortex streets near Unimak Island, a pattern of swirling clouds formed by strong winds interacting with elevated terrain. A significant feature of the storm was a polar low, a compact storm system with tropical storm-force winds, located southwest of Anchorage. This system brought snow and thunderstorms, contributing to the cold and stor...