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Mid to long range discussion- 2025


wncsnow
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EPS had a nice jump in the overall precip shield while keeping temps about the same as 12z. Seems to be a nice look for many areas. The OP is a little juicier than the EPS mean, but they seem to align well with the overall placement of the precip shield and temps seem to be a little colder on the EPS mean than the OP.

trend-epsens-2025021400-f156.qpf_024h-mean-imp.us_ma.gif

trend-epsens-2025021400-f156.sfct-mean-imp.us_ma.gif

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1 minute ago, Brick Tamland said:

Things were trending great yesterday for here, and then after that big GFS run it started trending in the wrong direction. Have to see if that continues today or if we're in for another roller coaster ride on the models.

Always feels like this

1_6QUM2o3noRhVr6LytTAbHw.jpg

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24 minutes ago, Brick Tamland said:

What exactly did it show for central NC?

At hr 144 the storm was basically off Myrtle Beach a bit and precip across pretty much all of NC.  WaKe picked up a heavy dusting southeast to almost 2” northwest before a flip to ZR.  At 144, roughly 0.40 of ZR had fallen SE to 0.20 in the north.  Pretty heavy ZR was falling at 144 across most all of central NC.  From the look, it could become a pretty classic nor’easter with most of NC flipping to snow before it ends, but that’s my words and not from the model.  Also, Wake stays mostly 30 or below during the storm. 
TW

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42 minutes ago, Brick Tamland said:

Things were trending great yesterday for here, and then after that big GFS run it started trending in the wrong direction. Have to see if that continues today or if we're in for another roller coaster ride on the models.

LOL. I love that you think there’s the possibility of no roller coaster ride. 

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The 6z Euro at hr 144 is sleet and heavy freezing rain for many outside of the mtns. If the run were to extend longer WNC was about to transition to a legit deform band that could really do some damage. This seems like the first storm all year that doesn't just rocket out of the area. I think given the look of everything we could be dealing with a major winter storm in parts on NC and SC that has a wide variety of precipitation with temps well below freezing. 

prateptype_cat_ecmwf-imp.us_ma.png

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06z EPS looks better than 00z EPS when compared at hr 144, more snow further south and east as well as colder temps. So all and all even though it doesn't go out as far, the EPS looks colder than 00z and more snow with the initial front end. There was still more obviously to come in after hr 144. Also because it was setting up as a colder run freezing rain was further south and east. 

 

  

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trend-epsens-2025021406-f144.sn10_acc-mean-imp.us_ma.gif

trend-epsens-2025021406-f144.zr_acc-mean-imp.us_ma.gif

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This seems to be the first storm this winter both with legit cold and lots of moisture. Now it comes down to precip type. I think North of 85 will stay all frozen barring significant inland shifts, which seems unlikely with the depth of cold air. As always, expect an early flip to sleet and a more narrow band of ZR than global models show

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34 minutes ago, WXNewton said:

The 6z Euro at hr 144 is sleet and heavy freezing rain for many outside of the mtns. If the run were to extend longer WNC was about to transition to a legit deform band that could really do some damage. This seems like the first storm all year that doesn't just rocket out of the area. I think given the look of everything we could be dealing with a major winter storm in parts on NC and SC that has a wide variety of precipitation with temps well below freezing. 

prateptype_cat_ecmwf-imp.us_ma.png

Wild. That track in itself should’ve rendered all areas along and west of I-77 with a foot of snow and almost no mixing. 

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This is setting up like a classic major winter storm. Been a long time coming. The cold air this has to work with is significantly better than we’re used to with a lot of miller As so, freezing rain might be a bigger issue than normal. From experience though, that freezing rain area will shrink and sleet will become more of a factor. Also if this thing forms a deformation band, they frequently cool the column through rates and you end up with heavy snow in areas progged as a mix a few days out. Lots of words to say: im not buying a massive ice storm in the Carolinas if this is a coastal bomb. Lots to iron out but it is now looking likely (>70%) that central/western NC and most of Virginia will have a significant winter storm. Track will be key as always. We want a slower system still. 

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6 minutes ago, olafminesaw said:

SER strikes again!

ecmwf_z500aNorm_eus_49.png

It sounds counter intuitive from what we’ve become used to but with a prime cold air source north of this, we need it to start deepening earlier to be able to more efficiently work that air into the system at mid levels. Amped, assuming it doesn’t cut up the coast, might be better here. With the extreme -AO, this might have less chance of cutting even as an amped system. I don’t think BL temps will be an issue especially if this slows down but the mid levels are torched on most modeling except the ones showing it bombing off the Carolina coast. That’s definitely a trend at this point 

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