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re: Storm Tracking Thread: Post Tropical Storm Hermine

Posted on 8/30/16 at 9:59 am to
Posted by bayoudude
Member since Dec 2007
24949 posts
Posted on 8/30/16 at 9:59 am to
quote:

He doesn't need to be a met to know that stuff. It's fluids.


Reynolds number is used in planing craft theory as well
Posted by CFDoc
Member since Jan 2013
2093 posts
Posted on 8/30/16 at 10:00 am to
quote:

but you're being disingenuous if you're insinuating that the NHC or other real meteorologists are simply clueless.


Never said that. Nor did I insinuate anything about the NHC.

The models are what they are based on computational limitations of our time. Not idiots at the NHC. Those guys are brilliant, FWIW.

However, I do firmly believe that the deficiencies in the models are not always genuinely presented. Especially by the weekend professionals.
This post was edited on 8/30/16 at 10:11 am
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35606 posts
Posted on 8/30/16 at 10:01 am to
Exactly.

The good ole Re# has applications in a lot of fields.
Posted by CFDoc
Member since Jan 2013
2093 posts
Posted on 8/30/16 at 10:02 am to
quote:

Of course, just because a model isn't perfect doesn't mean it is not useful.


I never said they weren't useful. Just oversold. Especially in this thread.

Hell, they've been talking about this storm since it was 500 miles east of Cuba

As the storm builds, and it becomes more cyclonic, ordered, high speed, and full of hate, all of the models will behave better. It's what they were derived to predict.
Posted by CFDoc
Member since Jan 2013
2093 posts
Posted on 8/30/16 at 10:05 am to
quote:

He doesn't need to be a met to know that stuff. It's fluids.


What I had assumed as well.

But I throw out the word 'diffusion' and all hell breaks loose.
Posted by G Vice
Lafayette, LA
Member since Dec 2006
12911 posts
Posted on 8/30/16 at 10:06 am to
I appreciate your attempt to educate us on all of that, but it's a bit too heavy for most of us non-meteorologists. But still, we can learn something from your posts that we didn't know before, and better appreciate the science of the weather.
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35606 posts
Posted on 8/30/16 at 10:06 am to
Yeah, of course.

When I model watch, I'm just really looking for what will steer the storm. Where is the Bermuda High predicted to be in place? Are there other Hs that will act as a blocker? Is there an upper or mid level feature that will retard development or create a weakness around the H?

Until it gets deeper, there's not much more you can derive.
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35606 posts
Posted on 8/30/16 at 10:09 am to
quote:


But I throw out the word 'diffusion' and all hell breaks loose.


I got NAM style flashbacks to fluids and transport, so I was one of em fwiw.
Posted by tiger91
In my own little world
Member since Nov 2005
36703 posts
Posted on 8/30/16 at 10:16 am to
So tell me about this high that's supposed to turn this puppy to the East ... is it coming or not???
Posted by CypressTrout10
Louisiana
Member since Jun 2016
3012 posts
Posted on 8/30/16 at 10:19 am to
this storm is not even heading NW yet and it is supposed to turn by this afternoon according to the track
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35606 posts
Posted on 8/30/16 at 10:19 am to
quote:

I appreciate your attempt to educate us on all of that, but it's a bit too heavy for most of us non-meteorologists. But still, we can learn something from your posts that we didn't know before, and better appreciate the science of the weather.



It's not too heavy to understand, just a tad technical.

Basically it assumes the numerator of the Re is so much greater (interia) than the denominator (diffusive) that it's ignored to simplify the model. It's a good assumption on a stronger storm, but may not hold totally true on a weak low like 99L/TD9. It's a reason why models struggle more with open waves and depressions as compared to an existing hurricane.
Posted by Chad504boy
4 posts
Member since Feb 2005
166135 posts
Posted on 8/30/16 at 10:22 am to


cones > diffusion
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35606 posts
Posted on 8/30/16 at 10:22 am to
Haven't really checked out the maps this morning.

My understanding was there's a high building over Texas that was going to shift east over La. There's a high pressure hanging out over the Atlantic coast but also a low on its periphery. That should allow a weakness for the storm to move through over Florida when the high starts pushing on it.
Posted by PhillyTiger90
Member since Dec 2015
10667 posts
Posted on 8/30/16 at 10:31 am to
WWL has it going to Panama City now fwiw
Posted by tiger91
In my own little world
Member since Nov 2005
36703 posts
Posted on 8/30/16 at 10:32 am to
interpret this ... I'm weather stupid.

*gotta scroll down and click on FRONTS on the right side ... didn't link the page as I was looking at it*
This post was edited on 8/30/16 at 10:34 am
Posted by tke857
Member since Jan 2012
12195 posts
Posted on 8/30/16 at 10:35 am to
this is why I dont trust the weather man

This post was edited on 8/30/16 at 10:36 am
Posted by Chad504boy
4 posts
Member since Feb 2005
166135 posts
Posted on 8/30/16 at 10:36 am to
so the cone missed by 25 miles?
Posted by slackster
Houston
Member since Mar 2009
84610 posts
Posted on 8/30/16 at 10:37 am to
Yeah there are times when the hobbyists pick the model with their favorite outcome and tout it, but I think this thread has had a good balance of awareness and practicality.
Posted by longhorn22
Nicholls St. Fan
Member since Jan 2007
42286 posts
Posted on 8/30/16 at 10:39 am to
my guess is the flora bama border..
Posted by musick
the internet
Member since Dec 2008
26125 posts
Posted on 8/30/16 at 10:46 am to
quote:

Current movement: WNW at 6 mph


This post was edited on 8/30/16 at 10:47 am
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