September 11th, 2026 Timelapse
September 11th began with a blanket of clouds across the sky, contributing to an average cloud cover of nearly 89.2%. The surface winds were gentle, averaging just 3.2 mph, while winds at 100 meters above ground were a bit brisker at 5.2 mph. These low surface winds played a crucial role in keeping the clouds low, with about 64.8% classified as low clouds. The higher cloud layers, comprising 83.0% cloud cover, were likely influenced by the stronger winds aloft, which created a layered appearance in the sky. The stillness at the surface contrasted with the more dynamic atmosphere above, leading to some minor turbulence near the ground as the air struggled to mix with the layers aloft. The temperature hovered around a cool 53.7°F, setting a chilly tone for the morning.
As the day progressed into midday, conditions shifted slightly, although the cloud cover remained stubbornly dense at 98.2%. At this point, the surface winds slowed even further to an average of just 1.3 mph, while winds at 100 meters decreased to 1.7 mph as well, creating a noticeable lack of air movement. The increased cloud cover meant that the low clouds swelled dramatically, now accounting for 90.8%, while mid and high clouds still occupied significant portions of the sky. This thickening of clouds, along with the calm winds, suggested a stable atmosphere with little turbulence. Interestingly, the air at different altitudes was moving slowly, which meant that the clouds were not racing across the sky. Instead, they lingered, creating a soft, gray canopy with no precipitation falling, as the atmosphere seemed to hold its breath.
By evening, cloud cover remained high, with an average of 97.5%. Winds at the surface picked up slightly to an average of 4.6 mph, while winds aloft at 100 meters increased to 7.0 mph. This slight revival in wind strength at higher altitudes hinted at a potential for more dynamic cloud movements. The low clouds began to thin, dropping to just 26.3% coverage, while the high clouds dominated the scene at an impressive 97.0%. The evening sky showcased a fascinating contrast between the expansive high clouds and the more scattered low clouds, giving it a layered effect. Turbulence was minimal, but there was a gentle wind shear as the faster winds aloft pushed against the slower surface winds, creating subtle ripples in the upper cloud layers. The temperature remained steady around 63.4°F, marking a calm end to the day as the clouds continued to shift slowly into the night.
September 11th, 2026 Timeline
Screenshots with weather data (wind layers, clouds, precipitation)
Weather Info for September 11th, 2026
Sunset: 7:30 PM