What's Up With That Pesky Afternoon Wind Shift?

Tools

By By Steve Pool

SEATTLE - Jim M. wrote in saying he commutes by bicycle from Lake City to Montlake, and noticed he'd have a headwind in the morning as he went south, but then had a headwind again going north in the afternoon.

While that doesn’t seem fair, it actually is -- at least, meteorologically speaking.

In Seattle, fair weather usually brings north winds, while cloudy, rainy weather brings a south wind. With the common summer marine pushes (the "morning cloud, afternoon sun" routine), the push of marine air off the ocean overnight comes in from the southwest, so the morning features a southerly wind.

But as the marine air burns off, we switch to a more northerly wind. So the morning south wind and afternoon north wind is pretty common this time of year. On hot days, it'll be north wind all day, and in the winter and fall/early spring, it'll be a southerly wind most days.

Your Photos

YouNews New snow for Mt. Rainier New snow for Mt. Rainier
A new blanket of snow arrived on Mt. Rainier during the prior
rain as seen in the photos taken before (August 28th) and after (August 31) the weekend rain.
YouNews Deception Pass Deception Pass
Lovely sunset and silhouettes at Deception pass bridge.
YouNews Sunflowers Sunflowers
Couldn't resist walking over to neighbors to photograph these beautiful Sunflowers they have growing in there yard.