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Pattern January Joke

One of my rules with trying to get a setup to work is that you need pretty good confidence that either the storm or the cold air is going to be there. If you're fighting for both to show up, you're in trouble. In this case for Sunday, we appear to be in pretty good shape for it to be cold enough for snow for a good chunk of the forum thanks to the first 2 waves moving thru on Wed-Thu and Saturday and pressing the baroclinic zone / cold-warm boundary SE to a spot along the coast. Just need to see additional trends with the wave dropping down from NDakota into the Deep South Sat-Sun and ideally have it dig boldly in positive tilt into Texarkana, then have it jerk neutral as it swings thru the SE.

Jan 13 GEFS Members 2.png


Jan 13 GEFS Members 3.png


Jan 13 GEFS Members 4.png
 
The 12Z EPS for SAV has gotten my attention for the small chance of Sun AM light snow/flurries, which in this area would be a big deal due to the relative rarity being that most winters get nothing. My expectations are low due to climo, it being pretty dry overall with member qpf progs being light, and marginal temps.

So, fwiw, here are some 12Z EPS images: ~25% of members have snow, which is notably high:
View attachment 183020

Mean: 0.2”, notable for here:
View attachment 183021
GaWX, can you do Atlanta's? thank you
 
Hey man - yeah EPS & Eur Wk look pretty poor after next week. GFS & CMC Suites not as bad with some cold to our north. MJO / Trop forcing look good, not a red flag. Biggest concern I see is what looks to be a decent -EAMT event in about a week which would want to retract the jet in the following week, and a lot of times the models don’t catch on with that until we get closer in…but that would lower our chances at seeing the western ridging we need for cold. Ever evolving, we’ll see how it goes
Coming back to this from Friday, the favorable tropical forcing / MJO appear to be driving the improving model trends for the last week of January. Euro suite in particular is keeping the Pac Jet nice and extended out at the end of their runs. Let's see if the trends can continue and if we can marry cold with storm.


Here is Euro Weekly run from today vs 4 days ago for Jan 29

Jan 13 Euro Wk Loop.gif

Jan 13 Euro Wk Loop T.gif



-VP uplift working west even here at the Dateline in the tropical Pacific (El Nino like look here)

Jan 13 Euro VP.gif


Jan 13 Euro MJO.png
 
Coming back to this from Friday, the favorable tropical forcing / MJO appear to be driving the improving model trends for the last week of January. Euro suite in particular is keeping the Pac Jet nice and extended out at the end of their runs. Let's see if the trends can continue and if we can marry cold with storm.


Here is Euro Weekly run from today vs 4 days ago for Jan 29

View attachment 183051

View attachment 183052



-VP uplift working west even here at the Dateline in the tropical Pacific (El Nino like look here)

View attachment 183054


View attachment 183055
4 more weeks...
4 more weeks...

Seriously though phases 2 and 3 aren't bad in Feb. I have a total dumpster fire pattern after roughly valentines day but its off to the races until then
 
4 more weeks...
4 more weeks...

Seriously though phases 2 and 3 aren't bad in Feb. I have a total dumpster fire pattern after roughly valentines day but its off to the races until then
To add to this I could be easily talked into cold lasting longer but as some point the mjo has to get back into the MC... right?
 
Watch the ens. mean H5 trough trend showing a trend WSW as of storm #2 crucial time: if this continues some would like and others wouldn’t as is normally the case since we live all over: regardless, what an absolutely beautiful +PNA!

EPS: last 5 runs through 18Z
IMG_7043.gif

GEFS: last 4 runs through 18Z
IMG_7042.gif
 
That’s a monster -AO…. It’s gonna get really really cold if this looks stays. View attachment 183077View attachment 183076

61e04aa281c66547a9421079a1097bea.jpg

Yeah it’s a big time cold signal…12z EPS had an almost -2 sigma 2m temp anomaly late January centered over the Great Lakes.


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Yeah that is pretty legit. If we could just activate the STJ at all. But that ridge axis out west is not bad. Just need a little less chaotic flow.
Might be a higher chance of getting single digits/negatives in the SE then snow with this look… the analogs popping up for the -AO are all truly cold centric, some snowed, even good ones, but the focus was the extreme cold. This look is infamous for putting a cold lobe of mid-low level cold air into NA and separating it from the Arctic
 
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