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Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by FabHK on Tuesday February 19, 2019 @04:44PM (#19203146)
Wind is "named" after where it comes from. If you fly north, and the wind is a north wind, you fly slower. (This terminology is in line with what GP said.)

Then, ground speed = air speed - wind speed.

Thus, GP seems to have either the sign wrong, or ground and air speed mixed up (but not both :-)

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by bartread on Tuesday February 19, 2019 @05:53PM (#19203745)
> Wind is "named" after where it comes from.

This is absolutely true, but has always infuriated me because it seems needlessly contrary as compared to the way we speak about anything else travelling in a direction as read from a compass. Does anybody know why it's the case?

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by ahartmetz on Tuesday February 19, 2019 @06:53PM (#19204245)
Probably because it matters where the air was before. Stuff like: north wind is could, south wind is warm, west wind is humid, etc
Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by bartread on Wednesday February 20, 2019 @04:09AM (#19206668)
Doesn't that very much depend on where you are though? E.g., with respect to the equator, major bodies of water and landmasses, mountain ranges, prevailing weather conditions. Also perhaps on seasons.

I can understand that it might be just an ancient tradition originating from a particular part of the world, that we've turned into a convention, but it loses meaning when you go elsewhere.

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by Arnt on Wednesday February 20, 2019 @04:53AM (#19206816)
It rather depends on where you are, but so does language. The words we use were cast locally. If you speak English some words were cast in the Ukraine, some in Germany, some in Rome, some in France, some in Britain, but the people living in those places weren't obliged to make the words globally meaningful.

If you go to Cape Town, a "north wind" presumably doesn't mean cold, because the area north of the city isn't colder than the city itself. This didn't matter to the people who first said "north wind" and I don't think it means much nowadays either. Just another little thing to watch out for in intercultural communication.

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by yesenadam on Tuesday February 19, 2019 @10:50PM (#19205375)
Can you name anything else named after where it's going, not where it comes from? I can't think of anything named like that, but I guess there must be some.
Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by cr1895 on Wednesday February 20, 2019 @02:22AM (#19206254)
Within a marine context, current is typically given as direction to while wind and waves are direction from.
Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by bartread on Wednesday February 20, 2019 @04:04AM (#19206648)
Or when you're out walking you might say that you're "heading north". Granted if you wanted to report your rough position relative to someone else you might say something like, "I'm 500m north of you."