November 20th, 2025 Timelapse
On November 20th, the morning began with a dense blanket of clouds that covered approximately 94.2% of the sky, predominantly low clouds accounting for 93.2% of this coverage. The air temperature was a brisk 44.1°F, creating a cool, damp atmosphere. Surface winds averaged 7.6 mph, while at 100 meters above the ground, the winds picked up to a stronger 13.0 mph, creating noticeable wind shear. This difference in wind speeds contributed to turbulence, which stirred the low cloud layers, causing them to shift and swirl across the sky. The relatively calm surface winds did not match the stronger aloft winds, resulting in a dynamic interplay between the layers. Occasional light precipitation, totaling 0.08 inches throughout the day, began to fall as the clouds continued to thicken, further saturating the air.
As the day progressed into midday, the cloud cover began to decrease significantly to an average of 67.5%. The low clouds persisted, covering 67.2% of the sky, while mid-level clouds sharply diminished to only 5.2%, and high clouds made a brief appearance at 0%. Winds at the surface increased slightly to an average of 9.2 mph, while winds aloft at 100 meters remained relatively stable at 13.2 mph. The slight increase in surface winds may have contributed to a more stable atmosphere, allowing the clouds to move more uniformly across the sky, albeit at the mercy of the stronger winds above them. This resulted in a striking visual effect with fast-moving clouds at higher altitudes, contrasting with the more languid movement of the lower cloud layer, as turbulence continued to create interesting cloud formations.
By evening, conditions shifted once again as the cloud cover further reduced to 19.0%, with low clouds making up 17.0% and a scattering of mid-level and high clouds at 1.3% and 1.7%, respectively. The surface winds calmed significantly, averaging just 3.6 mph, while winds aloft dropped to 6.9 mph, reinforcing the turbulent dynamics that had been present earlier in the day. The diminishing winds and cloud cover allowed for a clearer view of the sky, particularly as the sun began to set at 4:35 PM. This tranquil end to the day contrasted with the earlier turbulence, highlighting how the interplay of wind at different altitudes can shape the weather experience. Overall, November 20th showcased a complex choreography of clouds and winds that evolved dramatically from morning to evening, providing a captivating display of the ever-changing Northwest sky.
November 20th, 2025 Timeline
Screenshots with weather data (wind layers, clouds, precipitation)
Weather Info for November 20th, 2025
Sunset: 4:35 PM