December 20th, 2025 Timelapse
On December 20th, the day began under a thick blanket of clouds, which set the stage for a rather gloomy but intriguing weather scenario. Morning conditions featured a robust low-level cloud cover, with an average of 92.7% obscuring the sky, primarily composed of low clouds at 82% coverage, while mid clouds contributed another 60.3%. The surface wind was relatively gentle, averaging 8.5 mph, but winds aloft at 100 meters soared to an average of 15.5 mph, creating a noticeable wind shear that could lead to turbulence in the lower layers. This difference in wind speed at varying altitudes likely contributed to the rapid movement of the clouds, as their form and density shifted with the breezy conditions. As a light drizzle descended, registering 0.01 inches of precipitation, the cool morning temperature hovered around 40.9°F, reinforcing the overcast and damp ambience.
As the day progressed into midday, the cloud cover intensified, reaching an impressive 99.5% as low clouds took the spotlight, now filling the sky almost completely. This persistent cloudiness contributed to a feeling of heaviness in the air, as visibility was limited. Surface winds picked up slightly, averaging 11.4 mph, while winds at 100 meters increased to 17.9 mph, reinforcing that turbulent interaction between altitude layers. The mid-level clouds remained fairly stable, composing about 59.2% of the total cloud coverage, but high clouds began to make a minor appearance, accounting for about 2%. Notably, the conflict between the faster-moving winds aloft and the slower surface winds continued to create turbulence, giving rise to fascinating cloud formations that appeared to swirl and shift dramatically against a gray backdrop. Another light drizzle fell during this period, with precipitation accumulating to an additional 0.01 inches.
As evening approached, the weather settled into a pattern that maintained the pervasive cloud cover, which averaged 99.3% overall. The surface wind eased back to an average of 8.3 mph, while winds at 100 meters diminished slightly to 14.9 mph, presenting a more uniform wind profile than earlier. The low clouds remained dominant, covering 99.3% of the sky, with mid clouds increasing to 98.3%, creating a dense layered appearance. The light precipitation continued, adding another 0.02 inches to the daily total, bringing the final count to 0.06 inches. The interplay of winds at different altitudes resulted in minimal turbulence, but the overall atmospheric dynamics still produced a striking visual effect, as the clouds appeared to shift and morph against the fading light of the day. The temperature finally settled at a mild 45.1°F, wrapping up a day marked by a captivating display of winter cloud cover and gentle breezes.
December 20th, 2025 Timeline
Screenshots with weather data (wind layers, clouds, precipitation)
Weather Info for December 20th, 2025
Sunset: 4:28 PM