Cloudy Cloak Over the Northwest
A dense marine cloud layer blanketed western Washington and Oregon in mid-September 2026, creating a striking visual contrast with coastal mountain peaks emerging above the fog.
A thick layer of low-lying stratus clouds and fog settled over western Washington and Oregon in mid-September 2026, driven by cool, moist marine air flowing inland from the Pacific Ocean. The cloud cover extended as far as the western foothills of the Cascade Range, while higher elevations near the coast remained visible above the layer. The National Weather Service noted that marine stratus clouds formed due to a temperature inversion trapping moist air near the surface, leading to condensation and widespread fog in some areas.
Satellite imagery from NASA’s Terra satellite captured the full extent of the cloud cover on September 19, 2026, at 10:45 a.m. Pacific Time, showing the Pacific Northwest enveloped in a dense, low-lying cloud blanket. The MODIS instrument on Terra revealed offshore clouds over the Pacific and smoke from wildland fires filling valleys in the North Cascades. The image highlighted the stark contrast between the cloud-covered lowlands and the mountain peaks piercing through the layer.
By late afternoon on September 19, skies had cleared over much of the region, as observed by NASA’s Aqua satellite at 4:15 p.m. Pacific Time. However, some marine clouds persisted along the Oregon coast, where temperatures remained cooler than inland areas. The rapid shift from overcast to clearer conditions illustrated the transient nature of the marine stratus event.
The event coincided with broader oceanic observations in 2026, including satellite measurements of sea surface height and chlorophyll levels, which indicated strengthening conditions and shifts in nutrient supplies. These data points were part of ongoing NASA Earth Observatory efforts to monitor environmental changes in the Pacific Northwest and beyond.