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January Medium/Long Range: A snowy January ahead?


mappy
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19 minutes ago, SomeguyfromTakomaPark said:

Man I am salivating at that 6Z GFS. I know it’s not a bomb but it’s a perfect moderate daytime snow on snow event for us.  

Yea that's perfect. I don't have to go into work and can just sit back with the wife and watch it snow.

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1 hour ago, mitchnick said:

I'm thinking we get an extended winter "thaw" in February, then a last gasp of winter late February into early March. Just a wag, but that's my story and I'm stickin' with it. 

Cansips and Euro are looking like a weakish Modoki Niño. If right, that along with cooling global oceans, may turn out OK as long as the PDO cooperates too.

Tough call. This current 2 week period could end up being the coldest/most active period of winter but I have my doubts for now. I'm expecting a -ao reload before any extended thaw. Otoh, winters don't behave the same as they used too so climo/history doesn't work as well as it used too. Right now the current AO dive still looks more like a classic 4+ week period versus a hit and run. Nothing surprises me anymore though 

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15 minutes ago, Bob Chill said:

Tough call. This current 2 week period could end up being the coldest/most active period of winter but I have my doubts for now. I'm expecting a -ao reload before any extended thaw. Otoh, winters don't behave the same as they used too so climo/history doesn't work as well as it used too. Right now the current AO dive still looks more like a classic 4+ week period versus a hit and run. Nothing surprises me anymore though 

I hope not. Otherwise, it seems like it will basically be just a repeat of last winter unless this Saturday storm suddenly morphs back into a big one.

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1 hour ago, Bob Chill said:

It's never really looked good for a bomb. Don't get me wrong, I want a nuke but it's pretty messy in the upper levels as it lifts north. No classic banana high and no consolidated shortwave. Imo, the best ingredient in place is baroclinicity (odd word lol) and not much else for things going nuclear. 

That said, it's pretty juicy in the gulf so even if decaying or disorganized on the trip north, no reason to think we can't get a sheared but juicy overrunner. The once common widespread 2-4/3-6 has been on hiatus. This setup is a very common way to get that. Time will tell as always 

Agree with all this but recently we’ve seen waves that rely on baroclinicity out down impressive qpf, not just around here but I’ve seen that trend.  I spend a lot of time up in Vermont and they’ve had a few crazy dumps up there in recent years where a progressive frontal wave dropped 20” without much dynamics or amplitude to the wave. Seems there is a higher bar than there used to be with these things. 
 

To be clear I’m not saying huge upside but it doesn’t seem to take much to squeeze out a decent snow of the wave takes the right track and there is a decent temp gradient. 

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6 minutes ago, Thewiledcard said:

Just wild to me that this storm is so juicy in the GOM and then hits the apps and evaporates. 

 

Upper levels lose lift and instability. Moisture is still there but the mechanism to wring it out gets pulled apart from messy interaction. Think of it like 3-4 way tug of war, very confusing and nobody usually wins. 

 

Doesn't mean that's locked in though. Just how it looks now. Northern stream is notorious for mid range surprises (in all directions). Difficult to model. 

 

@psuhoffmani agree 100%. We can have epic dry periods in any season but the last 4 years or so has taught me the same thing. When precip happens, a propensity to bust on the high side seems far more common than the other way around. If it pulls north all juiced up, my gut says it translates down stream no matter....

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2 minutes ago, mitchnick said:

Basically all northern stream.  New twist.

Idk about that. Southern stream is ripping. To me it looks like the NS is messing it up more than assisting. But it's the Nam doing Nam things at a range it shouldn't be allowed to run lol

image.thumb.png.2c424bbade46998b16b2bbf3f4cfedd1.png

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2 minutes ago, Bob Chill said:

Idk about that. Southern stream is ripping. To me it looks like the NS is messing it up more than assisting. But it's the Nam doing Nam things at a range it shouldn't be allowed to run lol

image.thumb.png.2c424bbade46998b16b2bbf3f4cfedd1.png

The main vort is northern stream. The vort in the sw sorta lost its identity. 

https://www.pivotalweather.com/model.php?m=nam&p=500th&rh=2025010712&fh=loop&r=conus&dpdt=&mc=&pwplus=1

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5 minutes ago, Thewiledcard said:

Also wild to me that we are in 2025 and we still have all these different takes on weather from the models. 

It's almost as if global climate interactions and the ability to decipher chaos in the system at long leads are incredibly complex. 

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2 hours ago, mitchnick said:

Really need to score in every opportunity we get in January because once the 2nd week of February arrives, the large scale pattern will deteriorate for substantial MA snows based on current modeling. 

Maybe, or like 2014 once the cold takes hold its difficult to scour out even once the h5 longwave pattern retrogrades.  If you look at that year the pattern wasn't actually as good post Feb 15 but the damage was done and its difficult to scour out established cold that time of year unless the pattern becomes downright hostile which I am not sure it does...the trough pulls back but the NS is close enough and I don't see signs of a huge SER, but I know that's a traumatic thing to see even a slight SER lately!  

Analogs are also iffy for March, some years flipped back cold and we had another chance at snow late.  But I know some toss March snow because it melts LOL 

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3 minutes ago, psuhoffman said:

Maybe, or like 2014 once the cold takes hold its difficult to scour out even once the h5 longwave pattern retrogrades.  If you look at that year the pattern wasn't actually as good post Feb 15 but the damage was done and its difficult to scour out established cold that time of year unless the pattern becomes downright hostile which I am not sure it does...the trough pulls back but the NS is close enough and I don't see signs of a huge SER, but I know that's a traumatic thing to see even a slight SER lately!  

Analogs are also iffy for March, some years flipped back cold and we had another chance at snow late.  But I know some toss March snow because it melts LOL 

Looked at Accuweather last night and it’s below average throughout the rest of the month with no respite. Been a while since that happened.

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21 minutes ago, Bob Chill said:

Idk about that. Southern stream is ripping. To me it looks like the NS is messing it up more than assisting. But it's the Nam doing Nam things at a range it shouldn't be allowed to run lol

image.thumb.png.2c424bbade46998b16b2bbf3f4cfedd1.png

Speaking of southern stream...do you think that stays active like it has been so far? I always like to see the gulf doing things in the winter, and the modeling doesn't seem to have any shortage of waves coming from there. But I could be looking at it wrong too, lol

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