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Pattern Fail or Fab February 2023 Pattern Thread

My little ‘rule’ is that from days 7 down to 4, we don’t need to be seeing the perfect, awesome solution, but we need to be headed in the right direction. So, by kickoff of the Eagles/49ers game (Day 4)
Another wait for the weekend to see if this looks more real eh? I can say I have a higher confidence (albeit slightly) than what we were hoping for at end of month awhile back
 
EPS trend as with the GEFS is for separation which I think is what we want but trying to figure out how this ends up biting us.

View attachment 131420
The stream separation, as we know is good. But what we need is a distinct northern wave, running across the northern tier just ahead of the southern wave and then out east into the Atlantic, allowing HP to slide into a favorable position. What we don't need is a northern stream wave glancing the northeast tip of MN and heading rapidly toward Newfoundland. In order to avoid the latter, we need the PV pressing to the SE. The flow up there seems pretty fast. So if that's going to be the case, then we need really good timing, which has been pointed out. At least we're kind of in the game and not torching ourselves to death unendingly.
 
12-18 hours slower with the southern wave, and a little more amped up and most of this board would be happy campers. Especially ice storm mongers such as myself.

gfs_z500_vort_us_29.png
 
Yeah GFS is a little better / a little farther south with the cold press TPV, but need the southern wave to be farther south and have it come out a 1/2 day later. Not far off
If we could get the cold press of the GFS with a little better s/w like the euro/cmc we would really be cooking with grease.
 
GFS following suit with all other models .. the ways of getting this event are a bit different on all but EPS did look similar to what the GFS is showing .. we’re making these trends within 180 hours now .. most positive trend we’ve had this close to go time than we’ve had all year
 
Very interesting that their was very little ice with that run though, unlike what the other models are showing.
 
It would not shock me to see a crazy sequence of model runs where this trends south of I 20 and then trends a bit back north. Especially if that PV gets stronger.


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Ehem…


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Very interesting that their was very little ice with that run though, unlike what the other models are showing.
Yeah, that was a timing issue. If the shortwave came through a little later, there would have been more ice. Also, we’ve seen various depictions of the high pressure to our north with respect to both position and strength. Throw in the PV position and there’s lots of moving parts.
 
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