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Pattern Jammin January 2024

Half the members on the EPS show snow for the ATL. I expect this grow quickly the next few days for many of us.

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The first week of January looks encouraging, probably the most optimistic I’ve been about our snowy prospects in years. I lowballed it on my snow forecast for January, but I personally think January will be our best month for potential here vs February.
 
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This is the best I’ve felt about a pattern since January 2022. Beautiful 5 day averages with tons of confluence over the 50/50 region, sagging TPV down to the Hudson Bay, nice western Canadian and Alaskan ridge, and an active southern jet that is also getting a lot of northern stream influence out of the Pacific Northwest and western Canada. This is actually has real cold air in it from the 50/50 trough and sagging TPV. IF and that’s a big if you can hold this look, I feel really confident of a winter storm north of 20 across the southeast.
 
The H5 map on the 06z GFS is just beautiful
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Looking at the ensembles, the look that they are showing toward mid-late month if you follow it on out is very interesting.
 
No that not a SER. You can tell it on the 500mb charts. It’s just a strong Arctic front with a strong southerly push of warm air out ahead of it. Doesn’t really matter much since it’s hour 384 of the OP GFS
Come on this like years past ,,21 is Seattle, give me a break
 
Gotta watch these looks on the ens with the southern stream and deep Atlantic confluence. If we’re gonna pop a winter storm up, it’s somewhere close to this exact look. View attachment 138990View attachment 138991
Also looking at the teleconnections the last couple days, they really are following how would expect unfold climo-wise for a moderate to strong El Niño. The AO is about to tank just after the first of the month and the NAO is headed negative as well so there should be good blocking setting up. The PNA does start to go negative as the Pacific jet retracts again but like you said that process should help to beef up the -NAO.
 
This gefs run is good examples of how we snow. Constant confluence from the low heights in the NE/Atlantic, active southern stream, which then the translates to more confluence as stream interaction happens and it moves to our east/NE, and more southern stream moving in. loaded diaper pattern. Gefs has this look a couple times 7A7E864A-0AB2-43C4-8279-E5C278D5A094.gif
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This gefs run is good examples of how we snow. Constant confluence from the low heights in the NE/Atlantic, active southern stream, which then the translates to more confluence as stream interaction happens and it moves to our east/NE, and more southern stream moving in. loaded diaper pattern. Gefs has this look a couple times View attachment 138995
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The lower heights over the NE and northern Atlantic is really very similar to January 2022 when we here in the NC Piedmont had 3 straight weekends with accumulating snow. The big difference is how active the STJ is staying on these looks… in 2022 we were depending solely on northern stream energy as the STJ was virtually non-existing
 
The lower heights over the NE and northern Atlantic is really very similar to January 2022 when we here in the NC Piedmont had 3 straight weekends with accumulating snow. The big difference is how active the STJ is staying on these looks… in 2022 we were depending solely on northern stream energy as the STJ was virtually non-existing
Yeah the southern stream that year didn’t wanna play fair at all. But those setups had some very deep, legit cold as well, these ens looks showing up look warmer, more marginal, but that’s typical for a El Niño. Very good look coming imo. Better then anything last winter
 
Yeah the southern stream that year didn’t wanna play fair at all. But those setups had some very deep, legit cold as well, these ens looks showing up look warmer, more marginal, but that’s typical for a El Niño. Very good look coming imo. Better then anything last winter
Absolutely. I also believe that CAD could be very stout with these looks. One thing that’s going for us east of the mountains is the fact that eastern Canada has managed to hold on to a fair amount of snowpack. These lower heights should lead to some good high pressure placement over the NE to tap into that cold air.
 
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