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Feb Long Range Discussion (Day 3 and beyond) - MERGED


WinterWxLuvr
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It’s way too soon to be worried about this...but wanted to point something out that can be useful when we are closer to an event. There are lots of variables but one factor that helped us survive a primary track to our west was this. 

As the system approaches this looks precarious at a glance.

859CAB34-CB26-4FF6-B2F0-A9E064219CAC.thumb.jpeg.158a454b724915f270180120e48be2bf.jpeg

The mid level boundary isn’t that far to our SW.   But look at the 850 temps to our south and southwest. 1-2 c mostly.

Now look at the humidity. 
B03CEDE8-AE0A-488B-BB3D-47E0BF4DD40D.thumb.jpeg.0be73634a4a83073daf4d90d3bd6767b.jpeg

that whole area is bone dry.  All that air will advect north ahead of the low. As it saturates and lifts north it will be plenty cold enough. The actual boundary of air that wouldn’t support snow that would have to advect north is much further south. 

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Recovery questionable 

 @SimonLeeWx

 
Replying to
The GEFS 35-day shows the point of uncertainty (abrupt spread growth) in the 10 hPa evolution around Jan 25-30. Some members continue to recover the vortex toward average, while others decelerate or even go for another U reversal. I think this is a point to keep eyes on!
 
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1 minute ago, frd said:

 

Recovery questionable 

 @SimonLeeWx

 
Replying to
The GEFS 35-day shows the point of uncertainty (abrupt spread growth) in the 10 hPa evolution around Jan 25-30. Some members continue to recover the vortex toward average, while others decelerate or even go for another U reversal. I think this is a point to keep eyes on!
 
Image

Would SSW be below 0?

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1 minute ago, psuhoffman said:

It’s way too soon to be worried about this...but wanted to point something out that can be useful when we are closer to an event. There are lots of variables but one factor that helped us survive a primary track to our west was this. 

As the system approaches this looks precarious at a glance.

859CAB34-CB26-4FF6-B2F0-A9E064219CAC.thumb.jpeg.158a454b724915f270180120e48be2bf.jpeg

The mid level boundary isn’t that far to our SW.   But look at the 850 temps to our south and southwest. 1-2 c mostly.

Now look at the humidity. 
B03CEDE8-AE0A-488B-BB3D-47E0BF4DD40D.thumb.jpeg.0be73634a4a83073daf4d90d3bd6767b.jpeg

that whole area is bone dry.  All that air will advect north ahead of the low. As it saturates and lifts north it will be plenty cold enough. The actual boundary of air that wouldn’t support snow that would have to advect north is much further south. 

Just the way it's supposed to work with a west based block and a 50-50 low. We have all the features in the right places. No high sliding off the east coast with return flow wrecking the airmass in front.

 

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8 minutes ago, psuhoffman said:

1. The low moves up west of the apps then transfers to eastern NC

2. there is a banana high over the top

3. read my post about the dry air 

Excellent post sir.  The dry air part was money and probably overlooked by many..or just me

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Just now, Ruin said:

eh its hard to buy any model even a few days out. friday/friday night strong so called cold front comes through temps will be colder but by only a few. today 45 yesterday 44 so um, yeah cant even get the next day right lol.

So don't buy it.

We are analyzing the runs though, because that's the point of this thread.

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11 minutes ago, Ruin said:

eh its hard to buy any model even a few days out. friday/friday night strong so called cold front comes through temps will be colder but by only a few. today 45 yesterday 44 so um, yeah cant even get the next day right lol.

No one is taking the surface maps as gospel. It is about the NH setup. And it is ripe for us to get hit. 

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