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Mid to long range discussion- 2025


wncsnow
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The primary trend that led this in a positive direction is the Polar Vortex over Canada. Notice how the heights are trending west a bit.  That allows the polar jet wave over Minnestoa/Dakotas to drop in behind the STJ wave. This promotes a more negative trough access(aka the warm moist firehouse is now pointed NNE instead of ENE). It doesn't take much to change the QPF shield in this scenario given it is mostly dependent on overrunning and an isentropic lift scenario. This also lends credit to the idea when Arctic Airmasses drop-down out of Canada they tend to move like a bowling ball and error a bit west on the models.

trend-ecmwf_full-2025011800-f084.500hv.conus.gif

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Goooooooood morning winter weather nerds:snowing:  It's easy to see that after this last system, nobody got their meds refilled. I do realize this was probably due to taking more than required at the time :P Anywho, I'm going to repeat for the gazillionth time that there is a ton of energy flying around and until the models start getting a grasp (hopefully by Sunday) of what to expect, the windshield wiping will continue. Patience grasshoppers. In the meantime, please don't forget to get those meds filled and take them as needed, get plenty of rest between model runs, practice your yoga skills to regulate your breathing, drink plenty of fluids and keep some chocolate handy to stop yourself from becoming hangry. Drop your shoulders, sit up straight, take a deep breath, relax your facial muscles, and feel the tension subside. All good now? Yay! Buckle up everyone and good luck! I can't wait to see the pictures of your backyard frozen paradise :wub: 

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So in NE SC, our forecast is talking about this storm and the potential for “light snow” on Tuesday into Wednesday, but is also been mentioning freezing rain (now has changed to snow/sleet/freezing rain) on Thursday night and chance for snow Friday as well. 
 

im guessing there’s another potential system as well?

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7 minutes ago, scottk said:

So in NE SC, our forecast is talking about this storm and the potential for “light snow” on Tuesday into Wednesday, but is also been mentioning freezing rain (now has changed to snow/sleet/freezing rain) on Thursday night and chance for snow Friday as well. 
 

im guessing there’s another potential system as well?

Yes there is and nobody is really taking about it because the models didn't even get the current system that is moving through the state now halfway correct until basically gametime. Fun times :lol:

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11 minutes ago, NorthHillsWx said:

So we gained the Euro and lost the GFS. That’s a trade I’m willing to make 

I think part of what we're seeing is both have a similar track/evolution, but the Euro is picking up on a more expansive precip field. I think it's probably more realistic in that regard, although it clearly is indicating dry air will eat into the moisture and limit QPF. As Eric Webb has indicated, the WAA should beat out dry air relative to what the models are showing. More and more January 2014 seems to be a really solid analog

january_28-29_2014_nc_snowmap (1).gif

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The late week system seems like it would have a chance to produce some snow if it’s close enough to get moisture back. Models are reinforcing the cold and with the new idea of an offshore LP development I don’t see why that wouldn’t be snow if we can get the moisture. Still a long shot but it has previously looked more like a rain event

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2 minutes ago, NorthHillsWx said:

The late week system seems like it would have a chance to produce some snow if it’s close enough to get moisture back. Models are reinforcing the cold and with the new idea of an offshore LP development I don’t see why that wouldn’t be snow if we can get the moisture. Still a long shot but it has previously looked more like a rain event

Don’t do this to us. It’s gonna be either cold and dry or 34 and rain. 

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