[FRIAM] Dry Line Report

[cody dooderson]

Thank you for waking me up. I was literally listening to the news and
researching how to bleed the brakes on my car before reading this.

I am not even going to pretend like I know how to read those skew T
diagrams. There is so much information packed into one diagram. And why is
temperature diagonal?

My weather understanding is mostly utilitarian. Like how El Nino makes for
better snow in the southwest, and La Nina for northern Utah. It must be
explainable as a complex phenomena, but I don't understand it.

Anyway, I enjoyed reading the dry line report this past week despite not
really understanding everything.

_ Cody Smith _
d00d3rs0n at gmail.com


On Sat, May 17, 2025 at 11:35 AM Nicholas Thompson <thompnickson2 at gmail.com>
wrote:

> Let's start with the Storm Prediction Center's risk map.
> [image: image.png]
> Now, overlay the surface map for the same area.
> [image: image.png]
> That's a complex map.  DFW has a stationary cold front to the north, the
> dry line to the west and a very juicy warm air mass to the south. I would
> not like to be flying into DFW this afternoon.
>
> Here is the 7 am skewT for DFW.  [image: image.png]
>
> The EML is still there.  It has lost its nice triangular shape, but you
> can see from the dewpoint line that it extends from 850 mb  up to 500 mb.
> The nose is still there but it seems to have developed a moustache and even
> some lips.  The area where the blue line is to the right of the red, the
> Convectively Available Potential Energy (CAPE) is substantial.
>
> [image: image.png]
> The jetstream is overhead but seems, if anything, ridgey with vorticity,
> if anything negative. I guess that's why the forecasters arent going
> crazy.  We have a juicy airmass at  the surface, a dry unstable mass above,
> a nearby coldfront to lift the column, a mild jetstream over head but no
> obvious contribution to Vorticity, perhaps even some suppression.
>
> The number of cards and letters received in response to these reports has
> not been overwhelming.  (};-\]
> Is this not a complexity list?  is weather not a complex phenomenon?
> There must be at least one other weather nerd on the list.  Or have you all
> fallen prey to politics and vehicle maintenance?
>
> Nick
>
>
>
>
> --
> Nicholas S. Thompson
> Emeritus Professor of Psychology and Ethology
> Clark University
> nthompson at clarku.edu
> https://wordpress.clarku.edu/nthompson
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