108
submitted 10 months ago by troyunrau@lemmy.ca to c/canada@lemmy.ca
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[-] herrcaptain@lemmy.ca 31 points 10 months ago

Makes sense - it's friggin' cold here like 4-5 months out of the year. The part that really blew my mind is that it only dates back to 2001. I was almost an adult then, and I don't ever remember it not being a thing.

[-] Oderus@lemmy.world 19 points 10 months ago

Windchill wasn't invented in 2001, just the new international standard.

[-] Atelopus-zeteki@kbin.run 14 points 10 months ago

I do seem to remember the effect from before 2001. But why was it invented? I mean sometimes it's kinda cool, but others it can be downright deadly. ;-)

[-] Oderus@lemmy.world 8 points 10 months ago
[-] Atelopus-zeteki@kbin.run 12 points 10 months ago* (last edited 10 months ago)

Yee, gads, what a dirty link. Thanks for the impulse. I hope your day is cozy.

How Wind Chill Got Started--and What It's Doing to the U.S. Midwest https://www.wunderground.com/cat6/How-Wind-Chill-Got-Started-and-What-Its-Doing-US-Midwest

https://en.wikipedia.org/wiki/United_States_Antarctic_Service_Expedition

Measurements of Dry Atmospheric Cooling in Subfreezing Temperatures by Paul A. Siple and Charles F. Passel https://www.jstor.org/stable/985324#page_scan_tab_contents or https://sci-hub.se/https://www.jstor.org/stable/985324

[-] Oderus@lemmy.world 3 points 10 months ago

Yeah, the link is gross as I was on my mobile. Thanks for the better link.

[-] troyunrau@lemmy.ca 12 points 10 months ago

I remember am radio reporting windchills like this, when I was a child. "Today's high is -26C with a windchill of 2200. This means frostbite in three minutes on exposed skin, so bundle up!" And my parents had a chart that converted windchill values to frostbite times.

[-] jadero@lemmy.ca 7 points 10 months ago

Going further back, I remember when that watts per square metre (the 2200 in your weather report) was introduced as a replacement for whatever windchill calculations they were using before.

One thing many people I know get wrong about windchill is the effect on needing to plug in a vehicle's block heater. If you normally are good down to -20C on a calm day, you'll also be good down to -20C on a windy day, despite windchill being far below -20. The engine will cool faster, not farther.

No matter how fast the engine cools off, it still won't get any colder than the actual air temperature. Of course, that also means that if you are good for 4 hours at -20C on a calm day, starting with a hot engine, then adding wind means you might only be good for 2-3 hours.

[-] BCsven@lemmy.ca 9 points 10 months ago* (last edited 10 months ago)

Glad you understand this, I feel validated. lol. I had an argument with my coworkers about this in the mid 90s. They said overnight -10 or like -30 with windchill so they were covering their engines with blankets. (No block heater) I tried to explain their cold engine is not producing heat, so -10 is all the engine will "Feel", and the wind will not make the engine -30.

[-] moody@lemmings.world 2 points 10 months ago* (last edited 10 months ago)

Yeah, the wind can never chill something below ambient temperature. It can only pull heat from the warmer object to the cooler object. If both are the same temperature, then there's no transfer of heat. More wind only makes the transfer happen more quickly.

[-] BCsven@lemmy.ca 9 points 10 months ago* (last edited 10 months ago)

I think they are meaning 2001 was when it was standardized internationally by Canada's work on it. We definitely had windchill warnings when i was a kid in 80s and 90s, but not based on a standard measuring system

[-] herrcaptain@lemmy.ca 3 points 10 months ago

Okay, thanks for that. I thought I was losing my mind.

[-] MrFlagg@lemmy.ca 2 points 10 months ago

aren't we also responsible for DST

[-] troyunrau@lemmy.ca 4 points 10 months ago

If we are, we made a terrible mistake! ;)

[-] Skyhighatrist@lemmy.ca 4 points 10 months ago

At first I thought they were referring to time zones. Time zones were an invention by a Canadian. But turns out the first two cities in the world to have DST were in Canada. However, DST was proposed before then by multiple different people, so I am not sure one can say it was a Canadian invention. After the two Canadian cities, it wasn't until Germany in WWI that any nation had DST nationally. Other nations soon followed.

this post was submitted on 13 Jan 2024
108 points (95.0% liked)

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