Meteorology question: Cloud direction vs wind direction?

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Discussion Overview

The discussion revolves around the relationship between cloud movement and wind direction, particularly how these can differ at various altitudes. Participants explore the implications of ground-level wind direction versus upper atmospheric wind direction, including the effects of the Coriolis effect and local weather patterns.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant notes that wind direction reported at ground level can sometimes be opposite to the direction of cloud movement, suggesting a potential difference in wind direction at different altitudes.
  • Another participant explains that surface winds are influenced by the Coriolis effect and ground obstacles, which can lead to differences in direction between surface winds and upper winds, although they question the extent of this difference.
  • A later reply reiterates the influence of the Coriolis effect and local pressure systems on wind direction, while also questioning whether the inquiry is intended as a general homework question applicable to all locations in the northern hemisphere or a localized analysis.
  • One participant emphasizes that the question is meant to stimulate thought rather than seek a definitive answer, indicating that the principles discussed are generally applicable across hemispheres.

Areas of Agreement / Disagreement

Participants express varying levels of agreement on the factors influencing wind direction, but there is no consensus on the extent of the differences between surface and upper winds or the specific implications for local weather patterns.

Contextual Notes

Participants acknowledge that wind direction can vary significantly with altitude and that local geographical features may influence these patterns. The discussion does not resolve the complexities involved in analyzing these differences.

Who May Find This Useful

This discussion may be of interest to those studying meteorology, atmospheric science, or anyone curious about the dynamics of weather patterns and wind behavior.

BarnRat
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Sometimes, but not always, the wind direction (as given by weather.com for my location) is exactly the opposite of the cloud movement. For example: the wind may be given as NW but the storm clouds are coming out of the SE. Almost always the wind direction given by weather.com is corroborated by the wind vane on the top of my house so I assume that weather.com is giving me the "ground level" wind direction. Am I correct in assuming that the upper atmosphere wind direction can be 180 degrees to the ground direction? I am aware that wind direction and wind speed can be different at different altitudes: jet streams.
 
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Winds circulate around low pressure areas due to the Coriolis effect and other forces. Ground winds are subject to drag due to ground obstacles, this slows it down reducing the Coriolis effect, as a result they turn into the direction of the low pressure and that's the main reason that surface winds have different directions than the upper winds (and hence clouds), but 180 degrees is a bit much, although the jet streams around 30,000 feet have also other, more complex logics.

Question, can you figure out in which direction the surface wind turns, in comparison to the upper winds?
 
Andre said:
Winds circulate around low pressure areas due to the Coriolis effect and other forces. Ground winds are subject to drag due to ground obstacles, this slows it down reducing the Coriolis effect, as a result they turn into the direction of the low pressure and that's the main reason that surface winds have different directions than the upper winds (and hence clouds), but 180 degrees is a bit much.
Thanks. I'll have to think about your answer.

Question, can you figure out in which direction the surface wind turns, in comparison to the upper winds?
Is this intended as a sort of homework question, meaning that the answer is the same for all locations in the northern hemisphere? Or do you want me to try to analyze my local weather/wind patterns?
 
Ah the question is just to stimulate thinking, figuring things out. I could have explained it and I will eventually, if needed. But it's essentially the same on each hemisphere.
 

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