• After witnessing the continued decrease of involvement in the SpotterNetwork staff in serving SN members with troubleshooting issues recently, I have unilaterally decided to terminate the relationship between SpotterNetwork's support and Stormtrack. I have witnessed multiple users unable to receive support weeks after initiating help threads on the forum. I find this lack of response from SpotterNetwork officials disappointing and a failure to hold up their end of the agreement that was made years ago, before I took over management of this site. In my opinion, having Stormtrack users sit and wait for so long to receive help on SpotterNetwork issues on the Stormtrack forums reflects poorly not only on SpotterNetwork, but on Stormtrack and (by association) me as well. Since the issue has not been satisfactorily addressed, I no longer wish for the Stormtrack forum to be associated with SpotterNetwork.

    I apologize to those who continue to have issues with the service and continue to see their issues left unaddressed. Please understand that the connection between ST and SN was put in place long before I had any say over it. But now that I am the "captain of this ship," it is within my right (nay, duty) to make adjustments as I see necessary. Ending this relationship is such an adjustment.

    For those who continue to need help, I recommend navigating a web browswer to SpotterNetwork's About page, and seeking the individuals listed on that page for all further inquiries about SpotterNetwork.

    From this moment forward, the SpotterNetwork sub-forum has been hidden/deleted and there will be no assurance that any SpotterNetwork issues brought up in any of Stormtrack's other sub-forums will be addressed. Do not rely on Stormtrack for help with SpotterNetwork issues.

    Sincerely, Jeff D.

Why does Cold Air Advection cause backing winds with height?

Joined
Jun 17, 2017
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76
Location
Sherwood, Arkansas (Little Rock area)
And, I suspect that the answer will also tell why Warm Air Advection causes veering winds with height.

I’ve seen this mentioned In multiple basic meteorology resources, but I haven’t seen an explanation of the physics that causes it, and I haven’t been able to intuitively imagine a hypothesis of my own either.
 
There is not a causal relationship here. The relationship is associative. In other words, having one (assuming geostrophic balance is not violated) is equivalent to having the other.

First big lesson there. Do not confuse correlation with causation.

Back to your larger question - the association is called the "thermal wind relationship" and is basically what happens when you have vertical shear of the geostrophic flow. The idea being that geopotential heights give you a sense of layer mean temperature, and coupled with geostrophic winds will give you a picture of WAA = veering

Note: this general principle is only valid on the synoptic scale, and only when winds are geostrophic. That means that in highly curved flow, or on smaller scales, this relationship does not hold. No, not the opposite...there is just no longer an explicit relationship.
 
Thank you, Jeff! Your explanations are always helpful.

Your last point is extremely important in preventing me from potentially getting further confused. The fact that there’s not a relationship that holds on small scales is not the same as saying that there is an opposite effect. I definitely could have fallen into the trap of thinking that those two things were the same while learning more about Thermal Wind.
 
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