We were all outside after dinner playing when we noticed some jets flying over. More specifically, we noticed their contrails. I realized that we don’t usually see a lot of contrails here in Utah Valley, which is funny because we live close to an international airport, so that got me wondering more about them.
For starters, I always used to call then “jet streams”, which isn’t correct and is something entirely different. So the first thing I learned about them is their correct name. Yay!
The first reason why we see so many jets and so few contrails here is because most jets are landing or taking off from the SLC airport. They are not at a high enough altitude to form a contrail. Airplanes at cruising altitude are where it is cold enough and moist enough to form contrails. Contrails last longer when there is a lot of moisture in the air. The one’s we saw were disappearing very quickly.
Sailors watch contrails to predict the weather. Trails that disappear quickly mean the weather will stay nice. Trails that linger a long time indicate a change in weather or precipitation is coming.
And here’s a picture of the moon because we like the moon too. (I really like my 200 mm zoom lens. Wouldn’t it be nice to have a 300 mm lens?)
And no post would be complete without a picture of Jackson. This picture is fitting because it was Jackson that first saw the jets and pointed them out.
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