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Closest PWS is 26

22° here. Coldest reading of the season so far.

Imby Columbia 5am 28.6°

AI ensembles similar too.

Weeklies better come through. lol.

Still a strong -PNA at 12/3 on EPS. As we said, gonna need to be after first week of Dec I think. That ridge is too far west in the Pacific.

31.9 so far. .

This weekend I’m heading up to your neck of the woods to hike Camel’s Hump and Mount Abraham. What should I expect for snow conditions?

https://www.icyclone.com/s/iCyclone_Chase_Report_MELISSA2025.pdf Main points: My location on the SW coast of Jamaica was well inside the RMW (radius of maximum winds) and got the eyewall’s inner right-front quadrant. The SE edge of the eye apparently grazed my location, temporarily bringing reduced wind speeds, improved visibility, and a marked shift in wind direction. My minimum pressure was 926.0 mb. While this might seem high, the report discusses how it actually makes sense, given recon data and the fact that I was probably a few miles from the absolute center. MELISSA's winds were absolutely ferocious—the most intense I've witnessed in 84 hurricanes. And the resultant wind damage was spectacular. This was a truly rare specimen. This is a preliminary version of this report which I rushed to completion because of time-sensitive requests for the data. In the next couple of weeks, I'll be releasing an expanded version with plentiful damage pics. Josh Morgerman iCyclone

26

Big snow aggregates are just demolishing the Woolly Lot right now at 21 degrees, and are being blown sideways by that wind as well! https://www.mammothmountain.com/on-the-mountain/mammoth-webcam/woolly-cam

Yeah, the 0z Euro looks really good for Stratosphere warming, coming in 3 bursts, and holding strong through December 4. Dec 4th has a +30-35 day normal lag as a secondary event to the troposphere, so we're correlating with -AO conditions to the 1st week of January.

00z ECMWF at 50 hPa has a full PV split with 3 daughter vortices, one right over the US. That'll help heading into December.

This is the pattern that a lot of us were talking about this Summer and Fall, showing itself in the first few days of December already! @40/70 Benchmark -AO/+NAO It has still shown difficult for an Aleutian ridge to get established and hold persistent.. notice how the Pacific is +PNA there. Could be the MJO passing through 7-8, too. Kind of a "Neutral ENSO" type thing in the N. Pacific, imo. -AO near 90N does correlate with cold around 45N, but it doesn't actually usually go south of 40N, unless the ridge moves over the Davis Strait or northern Canada. We saw this pattern last February. We'll need that +PNA to get going, amping a ridge over the West Coast to get a far SE pushing cold shot, at least in the first part of December.

IEM is such a fun little rabbit hole to sink into. Especially when things are quiet. Looked at tornado warning counts over the past nearing 20 years (2005-2025). A few things stood out to me in particular right away. There was one small area in Illinois that has had 0 tornado warnings in the past 20 years, near Dalzell (NNW of Peru) in LaSalle County. Similarly, two small areas in Iowa that have had 0 tornado warnings in same period. One in W Winneshiek County, around/east of Protivin. The other in Ida County around Battle Creek. Indiana appeared to have full coverage over the period, which is what I’d expected from IL/IA. MN/WI/MI/OH had several gaps, but again expected given areas reaching further outside the core climatological favored areas for svr/tor. One interesting part for MN, though, was the boundary between Grand Folks & Duluth CWA. Particularly pronounced between Wadena & Cass Counties. You’ll see it immediately. There’s definitely more county boundary differences that become noticeable but that one jumped out to me quite a bit compared to the rest of the field I looked at.

Would not be surprised at a coating. No sun to contend with. Early-season over-performer. See what HRRR comes up with.

He is the most conservative met i have ever seen. He is always playing catch up. I would sooner trust Justin Berk, at least he has faith in the flakes.

Upton has “rain/snow” in its forecast for northern half of Long Island tomorrow night

How could she cheat on such a stud. I’m appalled.

Mammoth is blizzarding at 21 20 degrees with wind gusts to 45. Village level has 3-4 inches. Main Lodge level has 8-9 inches on the ground with 21 degrees and it is coming down and blowing all over the place! McCoy Station at 9600 feet has 12-14 inches with 18 degrees, Summit at 11000 feet has 20 inches of snow at 14 degrees. Snow all night, at least another 4 inches, then more snow on Thursday from yet another storm in the Pacific Set. https://www.mammothmountain.com/on-the-mountain/mammoth-webcam/main-lodge https://www.mammothmountain.com/on-the-mountain/mammoth-webcam/woolly-cam Mammoth is set to Open on Nov 20.

It’s even reaching here. Maybe half an inch tonight.

24-36 hours later and still going.

Just investigated and it is indeed crisp out there lol

From JB today: Euro MJO closest analogs 1983 and 1989 The severe cold Decembers of 1983 and 1989 both raise the spectre of a cold shot letting loose into the Texas Citrus areas, with Fla secondary concern had a major stratwarm in mid to late November, almost identical to now —————- The only problem with this is that there was no major stratwarm in mid to late Nov of 1983 or 1989 or anytime during early to mid winter for both for that matter: https://www.researchgate.net/figure/The-SSW-and-SFW-event-onset-date-year-and-type-identified-in-the-NCEP-NCAR-dataset-The_tbl1_267063738 ———- Also, I checked to see if the 60-90N temperatures in the strat. in mid to late Nov were notably warm and they weren’t. Lastly, I checked the zonal winds at 60N in both Novs to see if they were weak despite no actual reversal. They weren’t as they were pretty close to normal. https://acd-ext.gsfc.nasa.gov/Data_services/met/ann_data.html#ncep_clim_stats_nh