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As of yesterday morning, we’d already picked up 7 to 8 inches of snow in the valley from our most recent clipper, and Bolton Valley was reporting 8 inches in the past 48 hours. So, consistent with what PF had mentioned, it didn’t seem like there wasn’t a huge elevation gradient for accumulations up to that point in the storm. We were actually in a snowfall lull at that point – the front side of the storm had wound down, but the back side precipitation was quickly moving into the area. Indeed, as I ascended the Bolton Valley Access Road in the morning, I drove right up into heavy snowfall as the first bands of snow from the back side of the storm were hitting the mountain. I geared up for a tour at the Timberline Base amidst huge flakes of snow falling in the range of 1 to 2 inches/hour. Clothing and gear were getting covered so fast that I was constantly having to shake off the snow. During my previous outing on Monday, I’d found powder depths of roughly 8-12” around 1,500’ at the Timberline Base and 12-16” up near the 2,500’ level. Yesterday I’d say you could tack on a couple more inches to those general powder depths. Even though a lot more snow fell than that, my liquid analyses revealed that we had a solid period of 10-11% H2O snow during the day on Wednesday with all those small flakes, so that would have compressed the existing powder a bit. Fortunately, the density of the snow had dropped down to around 5-6% H2O by Wednesday night, so if there had been any perturbing of the powder grading with that denser snow, it had been largely restored by Thursday morning. Coinciding with that denser snow that fell Wednesday, this most recent storm did have the advantage of bringing more liquid equivalent to the snowpack. Whereas our previous Clipper brough a bit more than a quarter of an inch of liquid equivalent here at our site, this one had already brough a half inch as of yesterday morning, which would likely mean that between a half inch and an inch of liquid equivalent fell in the mountains. So although the powder skiing yesterday wasn’t quite as light and airy as it was on Monday, it was still right-side-up, and the added liquid equivalent more than made up for it with the ability to charge a bit harder on steeper terrain.

Long range gfs is loltastic. Blasting on Christmas than again 3 days later.

6" snow depth in southern PA on the 03z RAP Models really moistened up tonight. 4" is looking more possible here, if I had to make a guess I'd say 3-3.5"

I'll stay here for the time being Dont really see any substantial cool down after this one this weekend ,even tho you can see troughs going through East Asia which could cause the pattern to reshuffle more or less but its getting effected by other teleconnections,that Aluetian blocking isn't moving by the EPS OR GEFS, maybe it will change in future runs,but really no signs this is gonna happen anytime soon.We have a better chance of severe upcoming the next couple weeks after this cold snap

Gfs AI was 2 inches to the pike region.

00Z HREF mean is pretty close to the Euro idea...max is in same zone where it seems to want to go like Dover-Monmouth for the highest amounts https://www.spc.noaa.gov/exper/href/?model=href&product=snowfall_024h_mean&sector=ne https://www.spc.noaa.gov/exper/href/?model=href&product=snowfall_024h_max&sector=ne

You know it.. Here come the comments Sign here Lock it up Give me that and call it a winter The big ones are sniffed out early. It all is coming.. Until Dr No or the next run. Lol

Euro trimmed back too on the runs today.

Gfs with the Christmas Miracle again. Start a thread!

I went with 2-4” yesterday for our area and I’m making my final call tomorrow morning. I’m pretty sure I’ll be sticking with that. I expect closer to 2” for most of the area but I can’t rule out banding upping totals to 3-4” for some people.

What’s the latest NBM blend looking like @CAPE

High res > Ukie for this setup for sure

Snow on beaches is very cool. I just can't chase to Falmouth this weekend.

Jackpot over my house on that one

This could end up a warning event somewhere between Montauk and Provincetown.

It sucks with temps IMO. I’d rely on Euro/3k/etc for that at this point.

Thar she blows! What a windy looking map.

It seems to be the warmest model overall too. Now we can watch and see if any of the other models get warmer tomorrow, but if not...it could be on it's own. We actually haven't talked much about any potential temp issues...

UKIE isn’t exactly awesome at thermals. Given nothing else showing so much precip lost to rain, I’m gonna do a weenie move and toss the snow output and just look at the QPF

Ukie used to be a better model…it just seems to always be off the last few years. I’d trust the higher resolution models at this point. I do think DC will likely be just under 10:1 ratios.

The higher snow ratios maybe achieved north of South Mountain which could lead to a solid 3-5 inch snow event even in the LV if get good digging and upper moisture. South of South Mountain range will be more moisture acceptable so this is a tough call for the LV. The mesos are also having a tough time absorbing the digging aspect of this event -- the GFS was lost-- and the fact there maybe one hell of alot of virga throughout the profile until it collapses. We have a lot of cold dry air to overcome for this event to unfold. This storm event could easily become a debbie downer based on this fact, especially for those north of Philly.

@mitchnick URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 1114 PM EST Fri Dec 12 2025 PAZ065-066-131700- /O.EXB.KCTP.WW.Y.0025.251214T0000Z-251214T1800Z/ York-Lancaster- Including the cities of Lancaster and York 1114 PM EST Fri Dec 12 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM SATURDAY TO 1 PM EST SUNDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 3 inches. Locally higher spot amounts are possible. * WHERE...Lancaster and York Counties. * WHEN...From 7 PM Saturday to 1 PM EST Sunday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute.

Looks good for us though