July 21st, 2026 Timelapse
On July 21st, the day began under a canopy of high clouds that made for a subdued sunrise. Surface winds were gentle, averaging about 2.0 mph, while winds at 100 meters were slightly more brisk at 2.5 mph. This difference in wind speeds at various altitudes created a mild turbulence effect, as the winds at the surface and those aloft were moving in conflicting directions, with a 62-degree difference between them. The cloud cover was significant, with an average of 57.2%, primarily composed of high clouds. Low clouds were entirely absent, and the few mid-level clouds only contributed a marginal 0.8% to the overall view. As the morning progressed, these high clouds shifted lazily across the sky, influenced by the meager upper winds, leaving little chance for precipitation.
By midday, the atmosphere transformed dramatically as temperatures climbed to an average of 85.1°F. The previously dense cloud cover had reduced to a mere 10.2%, with high clouds dwindling to 2.0% and mid-level clouds comprising 8.2%. Surface winds picked up slightly to an average of 2.3 mph, while winds at 100 meters increased to an average of 3.0 mph. This slight uptick in winds revealed a clearer view of the sky, albeit with the dynamic layering of clouds still visible. The wind shear effects became apparent as the stronger upper-level winds began to push against the slower surface winds, creating a gentle rippling effect in the remaining clouds. As a result, the overall sky took on a vibrant blue hue, with high clouds scattering sunlight, creating a visual feast above.
As evening approached, temperatures rose further, averaging 88.0°F, and surface winds increased to an average of 5.5 mph, while winds at 100 meters reached 8.2 mph. The cloud cover remained quite minimal at 6.0%, consisting of 5.3% high clouds and a scant 0.8% at mid-levels. The atmospheric conditions provided a serene end to the day, but there were still hints of turbulence due to the layered winds. The higher winds continued to move in different directions compared to the surface winds, adding depth to the sky's appearance as the remaining clouds drifted slowly. The layering created interesting shadows and lighting effects as the sun dipped below the horizon. Overall, July 21st was marked by a gradual shift from a cloudy morning to a bright midday and ending in a tranquil evening, showcasing the beautiful interplay of temperature, wind, and cloud cover in the Northwest skies.
July 21st, 2026 Timeline
Screenshots with weather data (wind layers, clouds, precipitation)
Weather Info for July 21st, 2026
Sunset: 8:54 PM