February 9; coldest temperature ever in Salt Lake City

[Scott P]

For any weather buffs out there, today is the anniversary of the coldest temperature ever recorded in Salt Lake City. Check out the temperature was back on February 9 1933:

82698

The next day, February 10, was -26F and the second coldest temperature ever recorded in Salt Lake City:

82699

[Sandstone Addiction]

My dad often talked about the "winter of 33" and how cold it was. Not sure if it was this particular winter or not, but he also talked a lot about devastating spring flooding in the 30's and how they had to dynamite massive log jams on Hobble Creek.

[BruteForce]

I had to drive South to Richfield yesterday. It was foggy all the way to the junction of I-70 @ I-15. South of Nephi and just before Scipio, outside temps were well below zero and visibility was about 10'. My truck went from freshly washed to layered in frost & ice. I don't recall ever having that happen before.

A strange oddity occurred too. The moment outside temps dropped below 5F, my CB antenna started a side-to-side violent dance that didn't subside until I got back into sunlight and temps got above 12F.

While not -30, it was pretty cold in that pea-soup/fog yesterday!

[accadacca]

More fog today and we are headed to the 50s with no current end in sight.

[Rob L]

...<snip>
A strange oddity occurred too. The moment outside temps dropped below 5F, my CB antenna started a side-to-side violent dance that didn't subside until I got back into sunlight and temps got above 12F. </snip>


It's called "aeroelastic flutter"

Probably ice build-up (and then melt) that leads to resonance caused by variations in airflow. It's called "flutter" in the aviation world, which tends to be a bit more catastrophic at higher speeds.

This can happen at a high frequency like this (not caused by ice) , but the results give a clue as to the destructive effects of flutter:


https://www.youtube.com/watch?v=K2lH7YBqZo0

https://www.youtube.com/watch?v=K2lH7YBqZo0

or at a low frequency like this:

https://www.youtube.com/watch?v=XggxeuFDaDU
https://www.youtube.com/watch?v=XggxeuFDaDU

It does depend upon the mass of the object.