The first flakes of the season at our site in Waterbury were back on the 16th of the month with that last big snow event, but thanks to the system moving through yesterday into today, we accrued the first accumulations I’ve seen here. Temperatures were certainly above freezing here in the valley, but the intensity of the precipitation is what brought on the accumulation when one of the more active cells on the radar came through our area.
Based on posts that were showing up in the Northern New England thread at the American Weather Forum yesterday, it was clear that many valley locations were starting to see accumulations as the temperatures came down. Temperatures dropped well into the 20s F overnight, so by morning, CoCoRaHS reports revealed valley accumulations of anything from a trace to as much as a few inches in a stripe across Northern Vermont.
This was a great early season event for the local mountains, and even at elevation, there were still enough leaves left on some of the trees to create excellent snowliage images.
We had our first reported snow of the season here in Vermont over a month ago when flakes were spotted atop Jay Peak, but this latest round of winter weather has now brought us the first actual accumulations of the season. Our initial images of the accumulations came out yesterday morning when Powderfreak sent out some shots from the higher elevations of Mt. Mansfield during his usual Stowe Mountain Resort duties. Later in the day he sent along a nice image of the cloud ceiling and flakes falling on Spruce Peak while he was out on an afternoon hike. The snow was down to at least the 3,100’ elevation as of the afternoon, and with more moisture pushing into the spine of the Greens according to the radar, the potential for some additional overnight accumulations was looking good. The moisture seemed to be drifting a bit south though, and I saw a comment from Powderfreak that he felt the Central and Southern Greens would have the better chances for accumulations during the overnight period.
So, Oct 22 will go down as the date for our first accumulating Mt. Mansfield snow for the winter of 2023-2024, and we can now add it to the books and see how it compares to the averages. The stats for first accumulating snowfall of the season on Mt. Mansfield are below for comparison – today’s date of Oct 22 is later than the mean date of Oct 11, but well within 1 S.D., so quite normal in that regard. Assuming a normal distribution, about 25% of seasons will have later first snowfall dates than this one.
The dates of first accumulating Mt. Mansfield snow for some recent seasons are shown below as well, so this season sits later than the past few, but ahead of most of that stretch in the mid-2010s, which was a surprising run of later October dates.
Mean: 10/11
Median: 10/10
Mode: 10/17
S.D.: 15 days
N: 67
Most Recent: 10/22
Most Recent Days Deviation: +11
Most Recent # of S.D. Deviation: +0.732
Most Recent S.D. % Lower: 76.8%
Earliest 8/28/1986
Latest 11/17/1985
Date of first accumulating Mt. Mansfield snow by season:
2008: Oct 3
2009: Sep 30
2010: Oct 7
2011: Oct 30
2012: Oct 8
2013: Oct 24
2014: Oct 26
2015: Oct 17
2016: Oct 26
2017: Oct 27
2018: Oct 13
2019: Oct 18
2020: Oct 17
2021: Oct 18
2022: Oct 8
2023: Oct 22
I think it’s been a little while since we’ve had September snows here in the Green Mountains, but the mountains picked up some snow today for their first frozen accumulations of the 2022-2023 winter season.
After a fairly dry summer, the weather pattern has changed over the past few weeks to produce frequent synoptic precipitation, so let’s hope that sticks around we continue into the snow season!
The local mountains picked up some more snow in what looks to be our final snowfall event for the month of October. Down here in the valley at our house, I found a few flakes on my snow measurement board yesterday evening, but no measurable accumulation. This storm was more notable down in Southern New England where there were totals up around 7 inches in the Worcester, Mass area.
I woke up this morning to find snow on the grass and elevated surfaces at our house, most notably our picnic table out back on the deck. This was the first snow I’ve seen at our house this season, and although our weather forecast did suggest there was some potential for accumulation, you never quite know how it’s going to play out in marginal situations like this one.
In any event, the snow stuck even down here at 500’, so it should have easily accumulated in the higher elevations. I measured 0.6” on the boards at observations time, and it did look like it could have melted some since the point at which most of it fell.
This is about a week on the late side for average occurrence of first frozen precipitation here at our house, but just a day off for the average date of first accumulating snow, so it’s very typical in that regard.
Details from the 6:00 A.M. Waterbury observations: