How come wind direction does not match storm direction?
#1
Senior Member
Thread Starter
How come wind direction does not match storm direction?
In a rainstorm, I often notice the Doppler radar shows the storm moving in one direction but the wind direction is different. How can that be? Shouldn't the wind direction always be the same as the overall direction the storm is heading?
#3
GO BIG RED
Join Date: Nov 2008
Location: Hastings,NE
Posts: 678
Bikes: 1996 Bianchi Veloce 1993 Bridgestone MB-3 1992 Trek 700 1992 Trek 820
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I'm not a meteorologist nor did I stay in a Holiday Inn Express last night, but I believe it has something to do with storm cells being typically low pressure areas. That is they tend to pull air currents (wind) into them. I could be wrong however.
#4
Guest
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
A little amatuer meteorology:
Storms (low pressure cells) generally travel from west to east across the USA/North America. However, the storm cell itself tends to spin internally, with the low pressure ones spinning counterclockwise (?) and the high pressure (clear days) cells spinning clockwise. Which way the wind is blowing depends on what part of the storm is passing over you. Example is a hurricane, which is a severe low pressure storm. If you are going to get directly hit by it,you'll experience high winds blowing in one direction, then calm (the 'eye') then high winds blowing in the opposite direction. it you're at its edge, you'll only get wind in one direction.
BTW: The high and low pressure 'cells' spin in the opposite direction in the Southern Hemisphere.
Storms (low pressure cells) generally travel from west to east across the USA/North America. However, the storm cell itself tends to spin internally, with the low pressure ones spinning counterclockwise (?) and the high pressure (clear days) cells spinning clockwise. Which way the wind is blowing depends on what part of the storm is passing over you. Example is a hurricane, which is a severe low pressure storm. If you are going to get directly hit by it,you'll experience high winds blowing in one direction, then calm (the 'eye') then high winds blowing in the opposite direction. it you're at its edge, you'll only get wind in one direction.
BTW: The high and low pressure 'cells' spin in the opposite direction in the Southern Hemisphere.
#5
CRIKEY!!!!!!!
Join Date: May 2005
Location: all the way down under
Posts: 4,276
Bikes: several
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1589 Post(s)
Liked 687 Times
in
365 Posts
"if everything appears to be going OK then you've overlooked the one thing that is going wrong" It's a corollary of Murphy's law.
It means that you can either enjoy the tailwind and ride into a rainstorm or you can ride away from the rain and into a tailwind. Simultaneously riding with a tailwind and away from a storm would contravene the fundamental laws of nature and cause the end of the universe.
It means that you can either enjoy the tailwind and ride into a rainstorm or you can ride away from the rain and into a tailwind. Simultaneously riding with a tailwind and away from a storm would contravene the fundamental laws of nature and cause the end of the universe.
#6
Senior Member
Join Date: Feb 2005
Location: Toronto
Posts: 4,063
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
As mentioned, most storms are convective, meaning air rises within them. In order the replace this rising air, wind blows in towards the storm at ground level from all directions.
The actual path of the storm is determined by high-level winds, which are often different from those felt at ground level.
The actual path of the storm is determined by high-level winds, which are often different from those felt at ground level.
#7
Bike ≠ Car ≠ Ped.
As mentioned, most storms are convective, meaning air rises within them. In order the replace this rising air, wind blows in towards the storm at ground level from all directions.
The actual path of the storm is determined by high-level winds, which are often different from those felt at ground level.
The actual path of the storm is determined by high-level winds, which are often different from those felt at ground level.
Most, if not all, visible clouds are from warmer, more moist air being pushed or lifted into cooler, drier upper air layers. Storms are just big, fast versions, and they're taking in a lot of low-lying air to build up like they do.
#8
Uber Goober
You tend to think of storms as big balloon-like objects that float along with the breeze. But they're not. They're caused by the interactions of different air currents, and that air can be moving while the storm is stopped. So two big air masses can move into each other, and the storm is the collision, which can stay in one place, even though the air masses are moving.
An analogy: You can have a waterfall in a river. The waterfall stays in one place, even though the the water is moving right along.
An analogy: You can have a waterfall in a river. The waterfall stays in one place, even though the the water is moving right along.
__________________
"be careful this rando stuff is addictive and dan's the 'pusher'."
"be careful this rando stuff is addictive and dan's the 'pusher'."
#9
Bike ≠ Car ≠ Ped.
Interesting analogy. To apply it to a building thunderstorm, reverse it -- imagine the waterfall "falling upwards", which means that it'll have to suck water from the river beneath it. Near the "waterfall" (which might be called a waterspout at this point ), the flow of water is towards the "storm".
#10
Every day a winding road
Ground level winds will often change direction right before a storm. If it is windy and the wind suddenly drops, then picks up 180 degrees from where it was, it is time to run for cover.
#11
Every day a winding road
#12
Senior Member
Join Date: May 2005
Location: IL-USA
Posts: 1,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Likes: 0
Liked 5 Times
in
5 Posts
In addition to the different wind directions at different altitudes, storms can push "waves" ahead of themselves, and the wind direction changes as these waves pass--the wind is forward (same direction the wave is moving in) in front of the wave, and reverses when the wave passes over and you're behind it.
https://science.nasa.gov/headlines/y2...ndularbore.htm
~
https://science.nasa.gov/headlines/y2...ndularbore.htm
~
#13
Administrator
Join Date: Feb 2005
Location: Delaware shore
Posts: 13,559
Bikes: Cervelo C5, Guru Photon, Waterford, Specialized CX
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1106 Post(s)
Liked 2,180 Times
in
1,470 Posts
The short answer is highs and lows involve rotating movements from different directions. When they pass through an area, visualize what a counter-wise circular motion does.
#14
Bike ≠ Car ≠ Ped.
You'd think that my growing up on the Plains would expose me to more tornadoes, though. However, we knew that when the sirens sounded, it's time not to go looking for danger, but to the basement instead. I did catch one on video with a meteorologist-to-be college friend on a storm chase -- followed it 'till it roped out, too.
#15
Uber Goober
Here's my graphical explanation. Warm moving one way, cold air the other, the storm is where they're colliding, and in this case is getting moved north like a zipper. Of course, real life is more complicated.
__________________
"be careful this rando stuff is addictive and dan's the 'pusher'."
"be careful this rando stuff is addictive and dan's the 'pusher'."