So out of curiosity, what is the difference between a model OP and its ensembles? Does the OP run with more resolution/compute, do the ensemble parameters all vary around a distribution from the OP run?
It's encouraging that the tracks leaning to the west aren't less deep than the ones east of the benchmark. While chances might have slipped a little bit last night into today, there's still a real possibility of a big one
I see this a lot with hurricane tracking - where an EPS ensemble mean will have a fairly weak low pressure signal a week out which actually correlates to a substantial risk of formation. Since each ensemble member is seeded differently, the differences in the model outputs between each ensemble will compound frame by frame a la butterfly effect. To have a defined and visible low pressure system so (relatively) far out means that many of the ensembles are in agreement.
Four across four down is absurd, over 2.5 in of QPF in eastern mass. While the ratios might be lower than this weekend's system, that would be substantially more snow.
Spins a miller A storm out of what seems like nothing - a little offshore, but down to the 960's!
Now that we got a huge moisture thump I would love a classic Nor'easter with moving drifts, howling winds, and heavy heavy snow rates
Snow has been coming down hard for the past 6 hours. Hard to tell with the drifting but in Arlington MA I'd say we have 15-17" so far. If the storm continues to print in the remaining 4-5 hours of heavier snow, and if Monday pans out, wouldn't be surprised to see 24-30"
It's so easy to tell - real life is less "concentrated" than AI imagery. Even situations of joy and devastation will have areas of normalcy. AI interprets the user's request - often of dramatics and absurdity - and has no choice but to paint an image that is 100% to satisfy its loss function per the user query. Even as AI has gotten so realistic, the way people use it sure hasn't
15 degrees in Arlington and still snowing at a decent clip - doesn't look heavy but the accumulation is no joke. 10" ± 1" , shoveling this is like shoveling sand. Took me 20 minutes to shovel but there was easily a half an inch where I shoveled first.
Love me a sour monkey, one of my favorite sour beers. They sneak up quickly though - easy to forget that each one is the equivalent of 2-3 light beers. Though if you want to be doing snow angels outside in the dark at the height of the storm then it's easily the best option
Just a coating on the ground here in Arlington. It’s so cold that it’s directly accumulating on the roads - driving conditions are terrible (for a prius)
I’m ready to get into nowcasting mode soon. Seems that snow and sleet have started earlier than predicted for some folks in the Midwest and south - while there’s a large dry slot between the north and southern rails of precipitation, leaving AK and south TX in a snow hole
Even if it was clear sun all weekend for NNE and a monster thumper for SNE, that still doesn't make up for years of the pineapple express of tucked nor'easters bringing heavy snow up North and nothing but wind and rain for us folks in eastern Mass