We’re having a bit of a cold snap in Interior Alaska right now. The temperature has been hovering around 40 below zero all week. For those who would like to learn about life in cold weather without actually having to experience it, here’s your chance. ![]()
First of all, -40 is a “perfect” temperature but in only one way: you don’t need to designate Fahrenheit or Celsius because the two scales agree at -40.
Contrary to what you may have heard, -40 IS noticeably colder than -20, and -60 is much worse than -40. There is no “cold is cold” at which it really doesn’t get any colder. We consider -40 cold but it isn’t close to record-breaking cold.
The classic -40 entertainment is to go outside with a steaming hot mug of coffee and toss it up into the air. The droplets make a crackling noise as they freeze before hitting the ground. (If you just pour it onto the ground it won’t freeze before it hits; you need to separate it into smaller drops and give it more time in the cold air, both accomplished by tossing it upward.)
If you walk outside for long (30 seconds?), you’ll notice that if you take a deep breath through your nose, the inner surfaces of your nostrils will freeze together momentarily. If you’re going to be out longer than that, you ought to dress carefully: warm socks and boots, an extra layer or two on the legs, a warm parka, neck gaitor, hat & hood, and warm mittens. Avoid exposing skin. If you’re with friends, you need to keep an eye on exposed patches on each others’ faces (tips of noses, cheeks) for white patches where the skin is starting to freeze. You’ll notice that the outer fabric of your parka feels stiff; it loses some of its normal flexibility at -40.
Elementary-school children in the public schools don’t get to have outdoor recess when it’s colder than -20 F, so if you’re a teacher, you and your charges will probably be going stir crazy during a cold spell.
If you (addressed to a “southerner”, and you’re almost all “southerners” from the perspective of those of us living at 65 degrees North) and your vehicle were transported to Fairbanks right now, your car would probably not start after sitting overnight. Our cars are equipped with various electrical heaters, and our homes and many parking lots have outlets to plug in our cars. Most cars have an engine block heater and an oil pan heater. Some have a battery blanket or a trickle charger for the battery.
If your car WAS plugged in and you got it started, you would find that it feels very odd at first. The rubber of the tires is frozen with a flat spot where the car has been sitting, so it feels like you’re driving on square tires until they warm up enough to make the rubber flexible again. This is exacerbated by the virtual unresponsiveness of the car’s shock absorbers. The car’s seat even feels stiff because the springs inside are so cold. (Except for those who have a luxury I covet: heated seats!) The steering is stiff, too, and if you can avoid it, it’s a good idea not to make any sharp turns until things are warmed up a bit.
In blatant disregard for a completely unenforced local ordinance banning leaving cars running unattended, MANY people leave their cars running as they do errands, such as grocery shopping. In reality, once your car is warm, it will stay warm enough to start again with no trouble for several hours. All those idling cars do is keep the interiors warm for spoiled shoppers, AND add to –
ICE FOG. Nasty stuff. Like regular fog except it’s frozen, and by virtue of being frozen, it doesn’t dissapate easily. (Review your basic high school chemistry: energy of phase change. It takes a lot of energy to melt the ice crystals and turn them to liquid, and a lot more to dissipate the liquid fog.) Air can’t hold much moisture at -40, so all of the vapor kicked out by vehicles and other combustion devices (furnaces, power plants) condenses and freezes into ice fog. Some of us are lucky enough to live on the hills, above the ice fog that fills the valley, so we know that it’s a gorgeous clear sunny day with an incredible blue sky. Down in town, in the valley, you can’t see the traffic light 100 feet ahead of you, but up in the hills we can see the mountains that are over 100 miles away.
The bright side of -40 is that when it warms up to -20 it really feels nice.
They’re predicting highs of -10 (F) this weekend, which will be lovely.