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January Medium/Long Range: A snowy January ahead?


mappy
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3 minutes ago, mitchnick said:

What happened to the overrunning pattern? It keeps changing after 2 or 3 looks to something else, always further away in time. Just not believing the fantasy storms. 

It’s just a matter of time until a specific threat emerges. The window opens next weekend.

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3 minutes ago, Blizzard of 93 said:

It’s just a matter of time until a specific threat emerges. The window opens next weekend.

Too much of a good thing...cold. The question is whether the new pattern is conducive once we get a thaw. Who knows? Hopefully the Euro will reflect some stability unlike the Gfs and Gefs. Maybe their ensembles look better, but it's not encouraging to see the operationals lose a new pattern so fast. 

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13 minutes ago, mitchnick said:

What happened to the overrunning pattern? It keeps changing after 2 or 3 looks to something else, always further away in time. Just not believing the fantasy storms. 

So we punting thru the last week of January now due to too much cold? 

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1 minute ago, mitchnick said:

Too much of a good thing...cold. The question is whether the new pattern is conducive once we get a thaw. Who knows? Hopefully the Euro will reflect some stability unlike the Gfs and Gefs. Maybe their ensembles look better, but it's not encouraging to see the operationals lose a new pattern so fast. 

The last 2 weeks of January should feature storms & rumors of storms. 

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1 minute ago, Blizzard of 93 said:

I refuse to get upset with an Op run that delivers a significant snow chance & maintains the cold through the end of the run.

Who's upset? Calling it the way I  see it and in light of the concern of too much cold. But I'm not saying it won't snow. I am saying I don't buy Gfs fantasy storms though. 

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1 hour ago, mitchnick said:

Who's upset? Calling it the way I  see it and in light of the concern of too much cold. But I'm not saying it won't snow. I am saying I don't buy Gfs fantasy storms though. 

That’s the time period we identified though. Day 10-15. Not saying the day 8-9 thing can’t work but its not the best look. 

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The 0z EPS looks active between the 18th and 23rd, with potential for multiple waves. Best chance for frozen initially is to our northwest and then increases in the 21-23 window as the boundary moves southeastward. GEFS is fairly similar and gets cold air in place a bit sooner.

1737633600-CTskUKgszm0.png

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The 6z gefs looks really good day 10-15.  
 

Jan 19 Still looks like a rain to snow type wave.  Individual runs can’t agree on which wave after but they are shotgunning boundary waves at us with the thermal gradient oriented SW to NE just south of us day 10-15. That’s what we want in this type of pattern. 
 

 

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It’s gonna be a long few weeks if people react to every operational runs depiction of 200+ hour events.  None of these waves will be well resolved until inside 72 hours.  They tend to shift around a lot. If there is no NS interference they tend to shift north. If a NS wave ends up over the top in front they tend to shift south. But the boundary isn’t at stable as in a blocking regime. No chance guidance nails these at range. Some are overreacting to noise level changes run to run. 
 

look at the ensembles and the general long wave pattern.  Don’t react to synoptic specifics. 

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5 minutes ago, psuhoffman said:

It’s gonna be a long few weeks if people react to every operational runs depiction of 200+ hour events.  None of these waves will be well resolved until inside 72 hours.  They tend to shift around a lot. If there is no NS interference they tend to shift north. If a NS wave ends up over the top in front they tend to shift south. But the boundary isn’t at stable as in a blocking regime. No chance guidance nails these at range. Some are overreacting to noise level changes run to run. 
 

look at the ensembles and the general long wave pattern.  Don’t react to synoptic specifics. 

Ensembles have the best look for a 5-7 day period I can remember. Hopefully they don't lose it. 6z EuroAI has the 2nd wave with the snow again. Biggest concern for me remains cold overwhelming but that's more based on seasonal pattern/persistence.

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Just now, Ralph Wiggum said:

Weenie handbook says when too much cold overwhelms the pattern and we are dry and cold, when the pattern relaxes is when we cash in. That's actually pretty true, all joking aside.

Last 3-4+ years has taught us that long range models almost exclusively overdo the depth of progressive cold invasions. I don't think it's different this time. Doesn't mean easy snow. Just won't be nearly as easy for GA than current progs show lol

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1 minute ago, Heisy said:

I think the 6z Euro Ai about to go off for the 21-22nd


.

That period 21-24 is honking imo across guidance and has been for a couple of days. Alas, things can pop in the short range with these patterns so we wait patiently and continue to monitor.

 

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