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Winter 2018-19 Medium/Long Range Discussion


snowlover2

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42 minutes ago, Hoosier said:

Should have at least 2 or 3 systems to watch over the next 10 days.  Details tbd of course.

yep. looks busy. valid concern here that each track rolls right overhead leaving us on the warm side,dryslot, backwash flurries end.:thumbsdown:

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13 minutes ago, mississaugasnow said:

yikes, the pattern looks active but mostly rain. Those that were calling for below normal February temperatures definitely did not envision these many cutters.  

Pretty much the world was calling for a cold February.  

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IMO too many assumptions being made based off operational runs 5+ days out. Next Tuesday-Wednesday system very well could be a cutter and congrats MSP but recall that the operational ECMWF and GFS both had much colder solutions with it as recently as last night. Still plenty of spread in EPS members, so too early to call how things go, especially considering how much medium and even short range guidance has struggled this season.

 

Beyond that system, I continue to like the look of the pattern, especially central and western subforum. I don't trust the crazy MJO amplitude of the GEFS on the RMM plots, also a reason to doubt the 500 mb pattern on it as well as op GFS. EPS has and continues to look more reasonable with MJO forecast. It has a very strong and stable -EPO along with lower amplitude MJO moving into p8 and then p1, which are cold phases.

 

Maybe somewhat of a gradient pattern with modest positive height anomalies in the southeast and east but looks nothing like a massive torchy southeast ridge. In addition, remains to be seen if it's a phantom signal but today both EPS and GEFS went toward a negative AO and NAO beyond 2/13, which would be another reason to doubt a predominantly warm rainer/cutter pattern shown on clown range on some op runs. Should this pattern work out, beyond whatever happens next Tue-Wed, I see it being continued active and biased cold for a good chunk of the sub, so I'm pretty optimistic for it turning snowy again.

 

 

 

 

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To illustrate previous post, MJO RMM plots from CPC and 500 mb height and anomaly forecast valid 12z Saturday 2/16 from the GEFS and EPS. I suspect that the nearly off the charts MJO is leading to the much more pronounced southeast ridging look on the GEFS and this MJO projection is unlikely to be correct. The BCGEFS MJO and CFS MJO is still relatively high amplitude into p8 but more realistic looking and overall EPS looks most realistic.

 

You can see that the -EPO is similarly strong on GEFS and EPS, which is something that the GEFS has also caved to EPS on from previous runs a few/several days ago. The position of that EPO ridge and western trough is not so far west that there should be such a pronounced southeast ridge. If I'm right that this is MJO related, then expect the southeast ridge/WAR signal to mute on the GEFS and for the OP runs to back off the cutterish look in the longer ranges.

 

EPS as mentioned in previous post looks like a favorable -EPO/-PNA combo for an active storm track biased colder, with possible further help coming from -NAO/-AO if that signal comes to fruition.

 

5f5e6bec921c329fe42137788c8dc249.gif&key=361cbf3cdb5e5d22c55c28445da380d488f19c25e865cc39aa055a00d1e9414b9b12b6bc8e648b6b5fc4baf58be05673.jpg&key=7b295da0a56b97aadb95b7021966f8e6c84a6854e5a5489561c07cd88bd9859c662cad28ff8da2b8ae266ecfcadbbb90.gif&key=41ef696e7f30ce4ee342717eb34d2b3b274c063d53bf16eeea8599f6043bef26463d7c9f306469c435631341d209a6b1.jpg&key=adc15508238c195f1d0c777a483be0f3b9a31c611a74f92c2016927b4ba0bcba

 

 

 

 

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On 2/6/2019 at 7:25 PM, RCNYILWX said:

To illustrate previous post, MJO RMM plots from CPC and 500 mb height and anomaly forecast valid 12z Saturday 2/16 from the GEFS and EPS. I suspect that the nearly off the charts MJO is leading to the much more pronounced southeast ridging look on the GEFS and this MJO projection is unlikely to be correct. The BCGEFS MJO and CFS MJO is still relatively high amplitude into p8 but more realistic looking and overall EPS looks most realistic.

 

You can see that the -EPO is similarly strong on GEFS and EPS, which is something that the GEFS has also caved to EPS on from previous runs a few/several days ago. The position of that EPO ridge and western trough is not so far west that there should be such a pronounced southeast ridge. If I'm right that this is MJO related, then expect the southeast ridge/WAR signal to mute on the GEFS and for the OP runs to back off the cutterish look in the longer ranges.

 

EPS as mentioned in previous post looks like a favorable -EPO/-PNA combo for an active storm track biased colder, with possible further help coming from -NAO/-AO if that signal comes to fruition.

 

5f5e6bec921c329fe42137788c8dc249.gif&key=361cbf3cdb5e5d22c55c28445da380d488f19c25e865cc39aa055a00d1e9414b9b12b6bc8e648b6b5fc4baf58be05673.jpg&key=7b295da0a56b97aadb95b7021966f8e6c84a6854e5a5489561c07cd88bd9859c662cad28ff8da2b8ae266ecfcadbbb90.gif&key=41ef696e7f30ce4ee342717eb34d2b3b274c063d53bf16eeea8599f6043bef26463d7c9f306469c435631341d209a6b1.jpg&key=adc15508238c195f1d0c777a483be0f3b9a31c611a74f92c2016927b4ba0bcba

 

 

 

 

Cutters are certainly gone. Now it appears everthing will run south of OV.

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Cutters are certainly gone. Now it appears everthing will run south of OV.
Ensembles still look active with a -EPO/-PNA most of the time and I'll take my chances with that. If it doesn't work out, that's how it goes with weather, but I'd be surprised if we get to the end of February without having at least one decent snow event.

The operational models 4-5+ days out are typically prone to big swings, but it seems like the very active Pacific jet/fast flow pattern this season has added more chaos than usual to the modeling, making them less stable and at times unusable in the medium range and beyond. Best advice is patience and hope we score some good snow events.

Sent from my SM-G965U using Tapatalk

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On 2/6/2019 at 3:33 PM, Baum said:

yep. looks busy. valid concern here that each track rolls right overhead leaving us on the warm side,dryslot, backwash flurries end.:thumbsdown:

..............................................................................................................

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5 hours ago, Baum said:

  hearing  rumblings of a colder period commencing. If it can stay active maybe we can jackpot yet. Either way, has been a busy 30 days...can't remember this many repeated freezing rain events

 

Storm track should perhaps slide SE with cold air pressing. May open opportunities for OV and EC. Out to 8 to 14 days. 11-16 days cold overwhelms pattern if you believe what the GEFS is selling

 

Screenshot_20190219-193915_Samsung Internet.jpg

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On 2/19/2019 at 8:48 PM, Cary67 said:

Storm track should perhaps slide SE with cold air pressing. May open opportunities for OV and EC. Out to 8 to 14 days. 11-16 days cold overwhelms pattern if you believe what the GEFS is selling

 

Screenshot_20190219-193915_Samsung Internet.jpg

Chicago and S Lakes sure need one good storm to make up for most of MET winter's lameness. (and nothing against those to my west getting a historic run either)

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5 hours ago, RogueWaves said:

Chicago and S Lakes sure need one good storm to make up for most of MET winter's lameness. (and nothing against those to my west getting a historic run either)

Make that 1 good SNOW storm. My biggest snowstorm this Winter was 6.1", and it was a nice storm. MET winter has actually been quite active (snow, ice, rollercoaster) since mid Jan. The first half of met winter was trainwreck and no snowstorm in the world can make up for that. Im about long steady winters. Getting.a 3 foot snowstorm in march does not erase a brown December. That said....let it snow!

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