NASA Earth Observatory Captures Dramatic Cloud Inversion Over Pacific Northwest Mountains
NASA Earth Observatory has released an image captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra satellite, showcasing a significant marine cloud inversion over the Pacific Northwest. On September 19, 2026, a vast blanket of low clouds covered much of western Washington and Oregon, extending from the Pacific coast towards the Cascade Range foothills. Only the highest elevations, such as peaks in Washington’s Olympic Mountains and parts of Oregon’s Coast Range, protruded through the cloud layer, appearing like islands in a white sea. This phenomenon occurred due to cool, moist marine air moving inland beneath warmer air higher in the atmosphere, creating a temperature inversion. This inversion acts as a lid, trapping the cooler, moist air near the surface, which then condenses into stratus clouds or fog when sufficiently cooled. The image, taken at approximately 10:45 a.m. Pacific Time, illustrates how topography significantly influences regional weather patterns, with mou...