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Wintry Machine Learning Mauler 1/30-2/1

It's interesting how the 00z Euro completely shafts the PGV area where other modeling has 12-24" in this same area. Details that remain to be worked out as it's too early to say where the screwjobs will happen.

View attachment 191041
Brutal skip toward the Coastal plain
 
It's interesting how the 00z Euro completely shafts the PGV area where other modeling has 12-24" in this same area. Details that remain to be worked out as it's too early to say where the screwjobs will happen.

View attachment 191041
Is that due to phasing between the ULL and the SL?
 

This is a more reasonable solution clim
It's interesting how the 00z Euro completely shafts the PGV area where other modeling has 12-24" in this same area. Details that remain to be worked out as it's too early to say where the screwjobs will happen.

View attachment 191041

It's good to see north Georgia and eastern Georgia in on this. I'm still bullish on this and would like to see the GFS take a step toward the Euro later through the day. I am glad someone brought in the dryer air probability. The 00z Euro was probably picking this up across eastern North Carolina and the Pee dee of SC.
 
Word of caution... we'll need keep the dry air in mind. It has the potential to screw over the storm for a lot of people. Brad P and Fishel have both brought this up tonight.
It’s a highly, highly anomalous setup for us down south. But you can see here how the layer from 600mb up to 300mb dries out (those maps are covering 300mb to 700mb RH), but the full dendrite growth zone is moist because it’s so much lower than normal in this cold environment. I always say that if a storm doesn’t have enough moisture to saturate the DGZ, it’s not worth a nickel. Think we should be fine here

IMG_4752.png
 
Brutal skip toward the Coastal plain
Yeah, it seems likely that someone gets skipped between the ULL and the coastal low to some extent. Probably will be MBY and @KyloG's. At least it should still be a few inches...
 
This is a more reasonable solution clim


It's good to see north Georgia and eastern Georgia in on this. I'm still bullish on this and would like to see the GFS take a step toward the Euro later through the day. I am glad someone brought in the dryer air probability. The 00z Euro was probably picking this up across eastern North Carolina and the Pee dee of SC.
It's still possible models are underestimating the sublimation in the boundary level.
 
RDU is at 14 degrees with 30+ mph gusts during some of the heaviest snow on the 00z Euro. Kind of unbelievable. This is not our climate!!!

View attachment 191049
Sorry, one more map spam. -2F wind chill during this panel. Single digits for most of the Carolinas. Won't happen, can't happen!

1769667141089.png
 
It’s a highly, highly anomalous setup for us down south. But you can see here how the layer from 600mb up to 300mb dries out (those maps are covering 300mb to 700mb RH), but the full dendrite growth zone is moist because it’s so much lower than normal in this cold environment. I always say that if a storm doesn’t have enough moisture to saturate the DGZ, it’s not worth a nickel. Think we should be fine here

View attachment 191042
exactly. the snowfall maps/precip can see this.
 
exactly. the snowfall maps/precip can see this
Yeah, also the same for virga. People always worry about the models not accounting for virga, but they do (you can argue the models aren't taking the dry air into account enough for whatever reason, but that's different).
 
Yeah, it seems likely that someone gets skipped between the ULL and the coastal low to some extent. Probably will be MBY and @KyloG's. At least it should still be a few inches...
I rebuke this energy for our neck of the woods!

That said, *someone* is getting dry slotted with this setup. Hopefully not to an extreme though, and wherever that does set up, there’s still a solid few inches squeezed out
 
qpf really dropped off on the midnight releases from the nws compared to maps posted earlier in the day. judging by these digital snow angels y'all are making over here i'm guessing it's going to rebound in the morning and this was using data from the 18z runs. i went ahead and pulled CAE and ILM too. valid through 7pm saturday.

shoutout to the relative min. north of greenville, sc that has been getting some attention earlier in the chat.
mapgen (3).pngmapgen (1).pngmapgen (2).png
 
remember; these official products it is easier to go from lower end and adjust higher than to have high and adjust lower

protocol

the government/officials have other data and a best/worst case scenario, we don't really see that product from those briefings.. in most likelihood i'd think we see kind of the lower side of things on initial products to the public
 
It's interesting how the 00z Euro completely shafts the PGV area where other modeling has 12-24" in this same area. Details that remain to be worked out as it's too early to say where the screwjobs will happen.

View attachment 191041

Yeah this is basically what’s happening here, just shift things eastward on the Euro of course

1769667608844.png
 
Hot take here, but the one place I’m feeling probably the most confident about my chances to get a good snow out of this storm is down towards Charlotte/SW Piedmont.

While you may not get the most snow out of this storm compared to some places east of you, your forcing is much more concrete and straightforward. Over the Charlotte area/SW Piedmont, you have the upper low + upstate mesolow to fall back on to give you several Inches of snow at least even if the synoptics were to somehow go off the rails a bit

Over the Triangle area and into perhaps even the coastal plain (US-1/95 corridors) there’s a lot of uncertainty because you will have to potentially worry about getting dry slotted in the “no man’s land” between the upper low + mesolow to the west and the coastal out east.
 
remember; these official products it is easier to go from lower end and adjust higher than to have high and adjust lower

protocol

the government/officials have other data and a best/worst case scenario, we don't really see that product from those briefings.. in most likelihood i'd think we see kind of the lower side of things on initial products to the public
Translated that means it is easier to fudge the numbers lower to not panic anyone rather than provide the truth.
If we actually have to tell the truth, then we will at the last minute. That will cover our a**.

That's what is wrong with weather forecasting. Point Blank. Communicate clearly with the public about the risk and probability. Don't hedge things based on how you think it will be received. Weather forecasting should be honest. Period. That is what has been lost. Fix It.
 
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