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February 11-12 ULL Winter Storm


Upstate Tiger
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1 hour ago, msuwx said:

 

 

I was just looking back at old maps for 3/1-2/2009 to see how 2/12/2023 compares:

 

1) Similar strength of H5 low in low 540s at strongest in SE US but it is progged to remain that strong til well out in the Atlantic vs 2009 opening up:

3/1/2009 H5:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_500ht_20090301.html

 

3/2/2009 H5: no longer closed:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_500ht_20090302.html

 

 

2) In 2009 there was a big, strong (1044 mb) high to the NW centered over the Plains feeding in cold air:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_stnplot_20090301.html
 

 The upcoming case has no high to the NW to speak of to feed in cold air. However, this time there's moderate CAD from a 1027 mb VA high vs no CAD high in 2009.

 

3) Related to point #2, temperatures were ~10 colder in 2009 to the NW in the area from St. Louis to Chicago (near normal) vs well above normal this time. However, this time out ahead of the low it is ~5-10 colder (like in VA):

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_minmax_20090301.html

 

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5 minutes ago, GaWx said:

 

I was just looking back at old maps for 3/1-2/2009 to see how 2/12/2023 compares:

 

1) Similar strength of H5 low in low 540s at strongest in SE US but it is progged to remain that strong til well out in the Atlantic vs 2009 opening up:

3/1/2009 H5:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_500ht_20090301.html

 

3/2/2009 H5: no longer closed:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_500ht_20090302.html

 

 

2) In 2009 there was a big, strong (1044 mb) high to the NW centered over the Plains feeding in cold air:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_stnplot_20090301.html
 

 The upcoming case has no high to the NW to speak of to feed in cold air. However, this time there's moderate CAD from a 1027 mb VA high vs no CAD high in 2009.

 

3) Related to point #2, temperatures were ~10 colder in 2009 to the NW in the area from St. Louis to Chicago (near normal) vs well above normal this time. However, this time out ahead of the low it is ~5-10 colder (like in VA):

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_minmax_20090301.html

 

Pretty sure this all nets out to a hill of beans (or driveway full of puddles) unless you are right under the deform banding.  And you may need elevation assistance as well.  Whoever gets lucky is going to be reaaalllllyy lucky with this one.

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5 minutes ago, buckeyefan1 said:

 

You would think by now GSP would start talking the snow up more for all WNC .  The least I've seen the models calling for  is 7.3 for Asheville.  The local weather on channel 13 is talking token flakes.  I do  wish we had more cold air close by.  :snowing:

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9 minutes ago, olafminesaw said:

Really what we need to be tracking (with respect to low elevation snow)is the 1000-500mb 540 thickness line. The ULL is weak, so it never gets cold enough on the Euro, even with the better track compared to the GFS

This is right under a heavy band in Virginia as the back end rolls through. Would the column cool more than depicted in this case? Probably. But there just needs to be a deeper cold source to make this workable 

ecmwf_full_2023020912_087_36.8--79.4.png

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3 minutes ago, Tacoma said:

You would think by now GSP would start talking the snow up more for all WNC .  The least I've seen the models calling for  is 7.3 for Asheville.  The local weather on channel 13 is talking token flakes.  I do  wish we had more cold air close by.  :snowing:

Lol how long have you lived here? You know GSP ain't talking crap up until about 24 to 36 hours. And this is still a high bust situation. 

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You would think by now GSP would start talking the snow up more for all WNC .  The least I've seen the models calling for  is 7.3 for Asheville.  The local weather on channel 13 is talking token flakes.  I do  wish we had more cold air close by.  :snowing:

Lol this is pretty typical, they will play major catch up soon.
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5 minutes ago, wxduncan said:

I'm in Burke county right near Morganton. What's everyone's thoughts for my area right now? I mean it seems like both of the models have me getting almost warning criteria. But it feels like I'm right on the edge of something more or less. Thoughts?

As a fellow foothiller I think we have a good shot but there’s no denying the high risk for downsloping to completely ruin the event.

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2 minutes ago, SnowDawg said:

EPS mean:DDEEC02C-114F-4C21-949A-0BD93A733755.thumb.png.cd03ac9e4101a80c6099bef45422d48b.png

Similar to how the GEFS eliminated some of its eastern outliers the EPS eliminated some of its western ones. Seems they are trying to meet in the middle maybe.

Yeah.  I gotta say there’s a lot of handwringing here in western NC and SC outside the mountains over what happens but I would be most nervous if I was in eastern Tenn.   

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2 hours ago, PantherJustin said:

not trying to be an ass.... but EYE no offense it was never a triangle thing anyway , and why lock the thread ? you can just not open it , certainly still a possibility for anyone along and W/NW of 77. I mean i get the discouragement but enough with this garbage man youre better than this  

It’s been this way for a couple of years now.  Use the block feature.  

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