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Thracken13
Auburn Fan
Aft Cargo Hold of Serenity
Member since Feb 2010
12511 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
just proves - no matter how much you think you know, Mother Nature will give you the middle finger and show you something


LegendInMyMind
Member since Apr 2019
18785 posts
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re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

just proves - no matter how much you think you know, Mother Nature will give you the middle finger and show you something


Twitter has a bad habit of never looking for failure modes. They get tunnel vision on a couple parameters and miss the bigger picture. The opposite is also true. Many of them lack any nuance and just get carried away.


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Duke
USA Fan
Gonzales, La
Member since Jan 2008
30383 posts
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re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

We talking CAPE?


Why not when there's an obvious lifting mechanism?

quote:

Two days running low CAPE saw storms go wild and High CAPE fizzled. I love it when some on WXTwitter post monster CAPE soundings or models only to see it do nothing. Mississippi said the other day, "We don't need no stinkin' CAPE!"


Just thinking on all the open warm sector busts over the years...


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Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
The line does not seem as bad as it moves through west Alabama, particularly the northern part of the line.


Duke
USA Fan
Gonzales, La
Member since Jan 2008
30383 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

The line does not seem as bad as it moves through west Alabama, particularly the northern part of the line.


All the rain ------> stable air. Go back to that WPC image I posted on that last page, basically north of the W to E boundary will be instability limited.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

All the rain ------> stable air. Go back to that WPC image I posted on that last page, basically north of the W to E boundary will be instability limited

Yeah, and the earlier storms really worked the atmosphere from Birmingham north. Where I’m at north of Birmingham, my temp and dew point dropped into the lower 60s after those storms. It came back up during the lull, but the atmosphere clearly didn’t recover enough.


Duke
USA Fan
Gonzales, La
Member since Jan 2008
30383 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

Yeah, and the earlier storms really worked the atmosphere from Birmingham north. Where I’m at north of Birmingham, my temp and dew point dropped into the lower 60s after those storms. It came back up during the lull, but the atmosphere clearly didn’t recover enough.


It doesn't look like it can. The high energy air is getting lifted over y'all vs being able to advect in at the surface and reload quickly.

In weather oddities news, I'm watching a flurry and it's 50 degrees outside. I've seen wet bulbing, but this is a little ridiculous. It's evaporating basically on contact with the surface with this 40something% RH.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
Southern half of the line has its act together.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
Sounds like the NWS in Birmingham is on the verge of issuing a flash flood emergency for the Birmingham metro area.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
NWS Birmingham has issued a PDS Flash Flood Emergency for the Birmingham metro.

This post was edited on 5/4 at 5:21 pm


Bobby OG Johnson
USA Fan
Member since Apr 2015
12191 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

@NWSBirmingham
This Flash Flood Warning has been upgraded to Considerable! This is a LIFE-THREATENING SITUATION!! Please DO NOT drive into flood waters! #alwx


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LegendInMyMind
Member since Apr 2019
18785 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

Yeah, and the earlier storms really worked the atmosphere from Birmingham north. Where I’m at north of Birmingham, my temp and dew point dropped into the lower 60s after those storms. It came back up during the lull, but the atmosphere clearly didn’t recover enough.

Last night was the first evening/night we've had in North AL where it felt like storms. This morning, after the first round, it was entirely different. It became evident with the wording from NWSHuntsville and them dropping the Tornado watch way early.


LegendInMyMind
Member since Apr 2019
18785 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

Southern half of the line has its act together.



More lightning than I expected farther North. It just ran me back in the house off the porch.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
And looks like we have a wake low on the backside of the line. Winds really picking up behind the line in Tuscaloosa.


Bobby OG Johnson
USA Fan
Member since Apr 2015
12191 posts
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re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)


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Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)


Edit: knew I wouldn’t beat Bobby to it.
This post was edited on 5/4 at 5:33 pm


LegendInMyMind
Member since Apr 2019
18785 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

In weather oddities news, I'm watching a flurry and it's 50 degrees outside. I've seen wet bulbing, but this is a little ridiculous. It's evaporating basically on contact with the surface with this 40something% RH.

Mark Studduth showed their live cam in CO on his video yesterday, and it had some pretty good snow on the ground.


Roll Tide Ravens
Alabama Fan
Birmingham, AL
Member since Nov 2015
22695 posts

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
Confirmed tornado in Perry County, AL, moving into Chilton County.


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10
Bobby OG Johnson
USA Fan
Member since Apr 2015
12191 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
Observed now


Duke
USA Fan
Gonzales, La
Member since Jan 2008
30383 posts
 Online 

re: May 4th Severe Weather Threat Thread (Flash Flood Emergency - Birmingham & Hoover, Ala.)
quote:

More lightning than I expected farther North. It just ran me back in the house off the porch.




Still getting convection, just elevated.

I miss thunderstorms.


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