December 30th, 2025 Timelapse
On December 30th, the morning commenced with cool temperatures averaging 35.4°F, under a mostly cloudy sky. Low clouds comprised about 33.7% of the overall cloud cover, while high clouds, which made up a striking 58.3%, drifted steadily across the sky. Surface winds were gentle, averaging a mere 4.9 mph, but winds aloft at 100m escalated to 12.0 mph, creating a notable wind shear effect. This discrepancy in wind speeds led to some turbulence at the boundary between the surface and 100m levels, resulting in the clouds appearing to shift rapidly, particularly as the higher winds propelled them. The mix of low and high cloud layers created a velvety, textured appearance, while no precipitation fell to the ground, allowing for a dry yet overcast morning.
As the day progressed towards midday, the temperature rose to an average of 46.1°F, reflecting a gradual warming trend. The overall cloud cover slightly decreased to 63.2%, with high clouds still dominating the sky at 61.2%. Surface winds remained stable, averaging 5.3 mph, while the winds at 100m slowed slightly to 9.7 mph, reducing the intensity of the previously noted turbulence. The high-altitude clouds continued to move briskly in one direction, contrasting with the slower-moving surface clouds, which resulted in an intriguing visual display of layered cloud dynamics. The interaction between the high clouds and the lower winds created a serene yet dramatic effect, as hints of blue sky began to peek through in scattered areas, suggesting a potential break in the cloud cover.
In the evening, conditions began to shift once more as temperatures cooled down to around 41.2°F. The cloud cover thinned significantly to just 13.7%, comprised entirely of high clouds, as the earlier layers dissipated. Surface winds moderated to an average of 4.6 mph, while at 100m altitude, winds picked up again to 12.2 mph, leading to some light turbulence as the atmosphere adjusted to the changing conditions. The evening sky presented a minimalist aesthetic, with a few wispy high clouds elegantly drifting across a deepening blue backdrop. The calm surface winds paired with the brisker winds aloft created a peaceful end to the day, with the remnants of cloud cover casting soft shadows across the landscape below, highlighting the beauty of a December evening in the Northwest.
December 30th, 2025 Timeline
Screenshots with weather data (wind layers, clouds, precipitation)
Weather Info for December 30th, 2025
Sunset: 4:35 PM