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wxeyeNH

NNE Cold Season Thread

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14 hours ago, STILL N OF PIKE said:

J spin looking forward to any Bolton totals . My guess is nada till you go above 1500’ but big difference at 2.5k

 

11 hours ago, J.Spin said:

...perhaps I’ll get a chance to check things out after in the late afternoon after my last meeting.

From down here in this part of the Winooski Valley, you wouldn’t know that there was a solid amount of snow falling with this storm if it weren’t for some of the resources like Bolton’s webcams.  I don’t think I’ve seen a flake down here at 500’, and even our local hills surrounding the valley that top out around 2,000’, don’t have signs of white on them.

Seeing what was on the webcams though, I did take a trip up the access road to get a sense for what was going on with the accumulations.  I knew the snow line had to be way up there, but I just kept climbing and climbing, and there were no signs of new snow anywhere.  The first signs of old snow from the remaining winter snowpack were around 1,400’, but even at the Timberline Base at 1,500’, the precipitation was all rain.  The rain didn’t even change over to snow until about 1,900’, just before I reached the Bolton Valley Village.  That’s also right about where I saw the first accumulations of new snow taking hold.  The snow accumulations picked up quickly with 1-2” at the main parking lots at 2,000’ and 2-3” at 2,100’ near the base of the main lifts.

Here’s the full accumulations profile for this storm as of ~5:00 P.M. based on what I saw up to the Village and reports from reliable resources.  It gives a pretty good sense for the elevation ranges with the largest jumps in accumulation, but on average it looks like once accumulations took hold, they increased by more than an inch per 100’ of elevation gain:

 

340’:  0”

500’:  0”

1,000’:  0”

1,500’: 0”

1,900’:  0-1“

2,000’:  1-2”

2,100’:  2-3”

2,300’:  4-5”

2,500’:  8-9”

2,750’:  11-13”

3,000’:  13-14”

3,100’:  14-15”

It was still dumping at the base when I left:

27APR20A.jpg

…and the radar has shown continued precipitation tonight, so I wouldn’t be surprised at all to see those numbers increase a bit more by tomorrow.

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16 hours ago, J.Spin said:

…the radar has shown continued precipitation tonight, so I wouldn’t be surprised at all to see those numbers increase a bit more by tomorrow.

I would have liked to see where accumulations stood as of this morning, but I had an appointment for car maintenance, so I couldn’t stop by the Village until about midday.  I suspect snow levels dropped last night based on the fact that it was down into the 30s F at our place in the valley, but by the time I got up to Bolton today I’d say accumulations were generally back to what I reported yesterday.  Also, with temperatures rising well above freezing, the snow was notably wetter than what was out there yesterday.  The mountains were very scenic as the sun was coming out, so I grabbed a couple of images on the way back from BTV:

28APR20A.jpg

28APR20B.jpg

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Not sure if I had mentioned this on my entry about skiing Tremblant in early March but I was surprised to see BV from 89S on our way back. It gave me a different perspective of where BV is located. 

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2 hours ago, Angus said:

Not sure if I had mentioned this on my entry about skiing Tremblant in early March but I was surprised to see BV from 89S on our way back. It gave me a different perspective of where BV is located. 

You didn't know it was in VT? :lol:  It is surrounded by neighborhoods and they have bought out many houses over the years and paid for a lot of soundproofing upgrades

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April Totals

Accumulating Storms:  3

Snowfall:  4.1”

Liquid Equivalent: 4.46”

 

In terms of storms, snowfall, and liquid, this April was slightly on the lean side of average, but it’s certainly not atypical.  Of the 14 seasons in my data, it actually came in below the mean of 6-7” snowfall and well down into the bottom of the pack (4th from the bottom), but there are a number of seasons sitting just a few tenths of an inch above it, so it’s certainly clustered in with those 4-5” Aprils.  Total liquid was a few tenths below the mean, and the number of accumulating snowstorms was right in the 3 to 4 range that we average each April.

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The forecast here does have a chance for snow tonight, but it started changing over and accumulating a bit before 11:00 P.M.  It seems like the type of precipitation where the intensity matters a lot though, so it might not stay snow when the intensity drops until the temperature falls overnight.

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I remember those May snows well when I was up there. Looks like I will be headed up to the NC Mountains overnight. May be an inch or two of snow at 5K feet at sunrise. That would be just about at the latest recorded snow I believe.

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Event totals: 0.3” Snow/0.14” L.E.

 

Details from the 12:00 A.M. Waterbury observations:

New Snow: 0.3 inches

New Liquid: 0.08 inches

Snow/Water Ratio: 3.8

Snow Density: 26.7% H2O

Temperature: 33.6 F

Sky:  Light Snow (1 to 3 mm flakes)

Snow at the stake: Trace

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Event totals: 2.6” Snow/0.33” L.E.

 

Details from the 6:00 A.M. Waterbury observations:

New Snow: 2.3 inches

New Liquid: 0.19 inches

Snow/Water Ratio: 12.1

Snow Density: 8.3% H2O

Temperature: 32.0 F

Sky:  Light Snow (2 to 10 mm flakes)

Snow at the stake: 2.0 inches

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Event totals: 2.9” Snow/0.37” L.E.

 

Details from the 12:00 A.M. Waterbury observations:

New Snow: 0.3 inches

New Liquid: 0.04 inches

Snow/Water Ratio: 7.5

Snow Density: 13.3% H2O

Temperature: 38.8 F

Sky:  Flurries

Snow at the stake: 1.5 inches

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I haven’t really seen any talk about the snow with this next system, but with the way it’s pouring with temperatures dropping into the 30s F way down at this low in the valleys, I wasn’t surprised to see that it’s pounding snow at elevation.  Both the Bolton Valley Vista Peak Cam and MRG Bird Cage Cam are showing impressive snowfall rates, and the local radar is certainly lit up:

11MAY20A.gif

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2 hours ago, powderfreak said:

Yeah I think they all are north of Killington.  Just can't see it, ha.  Sugarbush took down their upper mountain cams after the last storm. 

Even snowing at the Bolton base pretty hard, just starting to stick.  Those folks who live up there at 2kft get another measurable snowfall, ha.

White ridgelines in the morning.

I saw your post about the Sugarbush mountain cams being down, and I didn’t see them either when I checked earlier today, but maybe the BTV NWS has access to them:

 

Area Forecast Discussion

National Weather Service Burlington VT

536 PM EDT Mon May 11 2020

Snow has been occurring with sfc temps in the 35 to 38 degree range. Web cam atop Sugarbush shows snowfall approaching 6 inches at 3900 feet, also noted Buels Gore at 2300 feet has several inches, so a few slick spots above 1800 feet is possible this evening acrs central/northern VT, into the NEK.

 

We’ve had about 0.5-1.0” of accumulation here at the house at 500’ so far on just about all surfaces, so the snow level has actually dropped pretty low.

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I found out they are on the Winter version of the Sugarbush App.

These have to be the biggest flakes I've seen in a very long time.

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12 minutes ago, powderfreak said:

I found out they are on the Winter version of the Sugarbush App.

These have to be the biggest flakes I've seen in a very long time.

That’s good to know about the app.  And yeah, this system has definitely had the right conditions around here for large flakes – we’ve had flakes up to 3” across at times this evening.

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Event totals: 0.9” Snow/1.10” L.E.

 

This has been an impressively moist system for the relatively short time it’s been affecting the area – I was out for an MTB ride midafternoon and it was just starting to rain, and now we’ve already had 1.10” of liquid equivalent.  At elevations where it’s been all, or mostly snow, it’s going to be quite a substantial resurfacing of the slopes.  We’re supposed to drop to around the freezing mark down here in the valley, and lows are projected in the 20s F at elevation, so we’ll have to see how much the snow dries out and how much more falls with respect to the potential for quality turns.

 

Details from the 8:00 P.M. Waterbury observations:

New Snow: 0.9 inches

New Liquid: 0.37 inches

Snow/Water Ratio: 2.4

Snow Density: 41.1% H2O

Temperature: 32.9 F

Sky:  Light Snow (2 to 5 mm flakes)

Snow at the stake: 1.0 inches

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14 hours ago, powderfreak said:

The QPF seemed to over-perform too.  I mean the summits had to get wrecked with a fast 6-10".

Here’s the elevation profile for accumulations I saw for this most recent storm in the Bolton Valley area this morning:

340’:  0.5”

1,000’:  1”

1,500’:  2”

2,000’:  3-4”

2,500’:  7-8”

2,800’:  8-9”

3,100’:  9-10”

As you can see, the largest increases in depths seemed to come from a bit below 2,000’ up to about the 2,500’ range before tapering down.  The storm was probably mostly snow above 2,500’, and with 1.21” of L.E. down here at the house, it was a decent resurfacing above 2,000’, and a very solid, “no worries” type of resurfacing above 2,500’.

Essentially all the snow above 1,500’ was winter-dry, and temperatures were still in the 20s F this morning from probably 1,500’ on up.  I’ll have to look back at all the April and May storms we’ve had, but this was some of the driest/wintriest snow I can recall in the past few storms.

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From the latest Mt. Mansfield Snow Depth Plot at Matthew Parrilla’s site, you can really see how the Mansfield snowpack has sort of been toddling along at 60 inches or so since way back in the beginning of February.  There were a couple of spikes up into the 70 to 80-inch range, but it’s really been pretty steady for over three months now.  It’s not in record territory or anything, but it’s certainly above average (by more than two feet) with the help of the fairly cool April and May.

12MAY20D.jpg

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10 hours ago, J.Spin said:

From the latest Mt. Mansfield Snow Depth Plot at Matthew Parrilla’s site, you can really see how the Mansfield snowpack has sort of been toddling along at 60 inches or so since way back in the beginning of February.  There were a couple of spikes up into the 70 to 80-inch range, but it’s really been pretty steady for over three months now.  It’s not in record territory or anything, but it’s certainly above average (by more than two feet) with the help of the fairly cool April and May.

12MAY20D.jpg

Looks like they would be BN for SDDs but closing the gap.

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19 hours ago, Ginx snewx said:

Gorgeous 

It was great the way the storm had pulled away to brilliant blue May skies by morning – with another amazing aspect being that the temperatures were in the 20s F, so the snow wasn’t even melting in that sunshine.

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