• Member Statistics

    16,542
    Total Members
    7,904
    Most Online
    nyrangers1022
    Newest Member
    nyrangers1022
    Joined
yoda

January Medium/Long Range Disco Thread

Recommended Posts

My wife, who cares none for weather, actually had a dream last night where her and I were prepping for a big snowstorm and I was talking about how the MJO wasn't lined up right and we were waiting for the Euro to run for new maps to help with our preps.

  • Like 2
  • Haha 7
  • Weenie 3

Share this post


Link to post
Share on other sites
14 minutes ago, jaydreb said:

GEFS looking like 2018.  Nice hit for VA/NC border.  

for friday or next week?

Share this post


Link to post
Share on other sites

The GFS finally resolved not having the SER now its the only model that next Wed-Fri wants to pull a  pre torch ahead of the PV drop...it'll end up wrong on that too

  • Like 8

Share this post


Link to post
Share on other sites
4 minutes ago, Ji said:

for friday or next week?

Sorry, for Friday.  GEFS has a few decent hits for next week but generally favors suppressed/OTS.  

Share this post


Link to post
Share on other sites
3 minutes ago, jaydreb said:

Sorry, for Friday.  GEFS has a few decent hits for next week but generally favors suppressed/OTS.  

I counted 6 that look acceptable. Not as good as the 6z run.

Share this post


Link to post
Share on other sites
6 minutes ago, snowmagnet said:

We are just right for Miller A's

yes...which are the least likely of those options

Share this post


Link to post
Share on other sites
5 minutes ago, CAPE said:

I counted 6 that look acceptable. Not as good as the 6z run.

One monster in there, too.  Weenie in me says its that one which turns out correct. :)

  • Weenie 3

Share this post


Link to post
Share on other sites
2 minutes ago, nj2va said:

One monster in there, too.  Weenie in me says its that one which turns out correct. :)

Yeah that's the rare one that would make pretty much everyone happy. Has snow for the whole state of MD and almost all of VA. Lets do it.

  • Like 1

Share this post


Link to post
Share on other sites

GFS op recycles the blocking...this second iteration is actually more ideally located and configured.  It’s fantasy land but I do agree with the idea the blocking likely recycles several times before breaking down. 
E06441A7-457D-467C-AED9-8D5ADAC5398D.thumb.png.9d11cd34fd3310eb25cf0ce9647b2d4e.png

  • Like 6

Share this post


Link to post
Share on other sites
1 hour ago, NorthArlington101 said:

As per a request...

BingoV2.PNG.2553a5d901b2b6c1ee63a2b433818649.PNG

 

Add Sun Angle and DC Snow Hole please

 

  • Like 3
  • Thanks 1

Share this post


Link to post
Share on other sites

I do think suppression is a legit risk until we see the blocking relax some. It’s a beast and centered pretty far south. That panel at the end of the GFS with a closed Rex block centered over Baffin is more where we want a strong block configured and located. That big elongated w-e block centered all the way down into Quebec could set up a shred factory flow over the US for a while.  It won’t last forever though and as it relaxes we have a window and if it does reform further north we could have an extended window later. 

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
14 minutes ago, psuhoffman said:

I do think suppression is a legit risk until we see the blocking relax some. It’s a beast and centered pretty far south. That panel at the end of the GFS with a closed Rex block centered over Baffin is more where we want a strong block configured and located. That big elongated w-e block centered all the way down into Quebec could set up a shred factory flow over the US for a while.  It won’t last forever though and as it relaxes we have a window and if it does reform further north we could have an extended window later. 

Kinda sucks though for the blocking to be that strong yet, its really not all that cold and still somewhat of a thread the needle airmass even if a storm came up...

  • Like 1

Share this post


Link to post
Share on other sites

I think Friday is about forked.  Euro moved back south.  Congrats NC.  

Share this post


Link to post
Share on other sites

Deep vortices  over the northeast tend to lift out more quickly than modeled. These are actually further northeast but it’s that action that is messing up our system this week. Move those out a bit quicker and the game changes.

Share this post


Link to post
Share on other sites
Just now, WxUSAF said:

I think Friday is about forked.  Euro moved back south.  Congrats NC.  

Pretty anemic for everyone outside the mountains of western NC.  We're not going to be missing much with this one. 

Share this post


Link to post
Share on other sites
2 hours ago, psuhoffman said:

There is always that risk in a blocking regime but you have to remember we are too far south for most patterns to work. Absent blocking to suppress the flow we are usually south of the storm track.   But take Friday for example. The issue is the blocking is a bit too strong and centered too far south. The ensuing trough in the east gets centered south of ideal. You can see on the means this week the west to east “blue” is a bit south of that “big snow” plot I posted. But if the track was further north we would be just fine. The few runs that did show snow for us were mostly west to east systems too...just they came west to east just under us instead of way down in the Deep South.   But it’s unlikely the blocking stays at the current really ridiculous levels. It will wax and wane and during those relaxations we could get a system to gain a bit more latitude or come west to east at a higher latitude. Take that storm that fringed us on the long range GFS last night. That gained no latitude at all. It moved straight west to east but if it comes across 50 miles more north we get a HECS.  PD2 was like that. It moved straight w-e until it hit the coast then gained some latitude but not much.  PD1 1979 also.  We also could get a storm that gains some latitude with a temporary relax that won’t show on a 7 day mean. The slight one day ridging ahead of the storm is washed out on means by the N flow behind the storm.  We don’t need a lot of latitude gain. Our ideal track is a primary to TN then jump to NC coast and a latitude gain to about Ocean City. From there ideally we want it to move east.  
 

That said the building positively tilted western PNA EPO ridge later in the period does add more threat of suppression.  January 1977 featured that look and it was arctic cold but bone dry.   That’s going to flood cold into the CONUS and suppress the baroclinic zone way south. So yea that’s a threat.  
 

But now I’m honestly getting frustrated and here is why. A week ago when the blocking showed but there was still a N PAC trough and not a lot of PNA and no EPO all the debs were saying “but it’s not cold enough in that look we would need a perfect track”. And now that the EPO/PNA ridge goes up it’s “but that could be suppressive”. Ok well what do you freaking want?  Those two things are mutually exclusive. You have to dance with one of those devils.  Our HECS look actually has less PNA EPO for the very reason you just said. But it’s not a cold pattern and sometimes it’s not cold enough and we get a perfect track cold rain. The epo ridge -NAO is a cold pattern but dryer and sometimes we don’t get any big juiced up coastals.  No pattern is 100% fool proof guaranteed to snow.

There’s some good points in there. I think one of the ones I find pertinent is the angle of PNA ridge and that lending to suppression. We’d ideally like that to have a more negative tilt to allow any sw that gets under us to gain latitude without the PNA punting is into a huge block and then OTS. Good points 

Share this post


Link to post
Share on other sites
6 minutes ago, WxUSAF said:

I think Friday is about forked.  Euro moved back south.  Congrats NC.  

This one never really had that feel, we went straight into hoping things would trend mode and never really had a solid hit. This one doesn't really feel like a loss to me. On to the next opportunity! That said I wasn't going to bail until 0z tomorrow so I'll hang in there :)

Share this post


Link to post
Share on other sites
24 minutes ago, psuhoffman said:

t won’t last forever though and as it relaxes we have a window and if it does reform

March will rock !         

  j/k

Share this post


Link to post
Share on other sites
7 minutes ago, WxUSAF said:

I think Friday is about forked.  Euro moved back south.  Congrats NC.  

I’m looking for the WxUSAF storm more importantly. ;)

Share this post


Link to post
Share on other sites
1 minute ago, WxUSAF said:

I think Friday is about forked.  Euro moved back south.  Congrats NC.  

I’ve kinda felt it was forked when all the guidance shifted the H5 track from across VA to across NC a while ago. The N trend we often observe the final 72 hours is not typically from a huge shift in the major synoptic features like the h5 track. It’s mostly due to the fact that globals tend to underestimate the north extent of mid level warm air intrusion and thus they also underestimate the NW expanse of moisture transport and WAA lift in the commahead.  They tend to expand that significantly in the end and that mid level warm intrusion also shifts the mix area north. But this isn’t the right setup for that without any deep cold around.  There is “some” typical last minute latitude gain of the surface low but it’s not usually that significant.  Based on these observed model biases our sweet spot at 72-144 hours out is to have the heavy snow centered just south of us. Like central VA and lighter snows up into our area. Something where a 50 mile shift matters. Once we start seeing the action shift into NC inside 144 hours it’s usually over recently. That’s felt like the way these play out the last decade or so.  

Share this post


Link to post
Share on other sites
2 minutes ago, Scraff said:

I’m looking for the WxUSAF storm more importantly. ;)

Agreed. Friday wasn't a big deal to me at all. Early next week is where my focus is.

Share this post


Link to post
Share on other sites

Not sure if the euro is going to get there, but the 500mb look through 144hrs is MUCH improved over 0z.  Much less sheared/progressive. Neutrally-tilted trough along the MS valley at 144.  

  • Like 1

Share this post


Link to post
Share on other sites

If you thought the GFS's 500mb height surface low was a mismathch,, wait until you see the Euro.

 

 

 

  • Haha 1

Share this post


Link to post
Share on other sites
41 minutes ago, psuhoffman said:

GFS op recycles the blocking...this second iteration is actually more ideally located and configured.  It’s fantasy land but I do agree with the idea the blocking likely recycles several times before breaking down. 
E06441A7-457D-467C-AED9-8D5ADAC5398D.thumb.png.9d11cd34fd3310eb25cf0ce9647b2d4e.png

Notice how the Pacific ridge is actually here, we almost get some cross polar flow here so temps won't be an issue with any storm that we get.

  • Like 2

Share this post


Link to post
Share on other sites
2 minutes ago, WxUSAF said:

Not sure if the euro is going to get there, but the 500mb look through 144hrs is MUCH improved over 0z.  Much less sheared/progressive. Neutrally-tilted trough along the MS valley at 144.  

There is much less of a suppressive flow in the way of that wave. But it’s also more complicated then the fairly simple bowling bowl system this week. Need multiple parts to phase. If they do it will come north though. It’s always something lol. 

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.

  • Recently Browsing   0 members

    No registered users viewing this page.