Sunday, January 18th, 2009

 

Summary:  0.9” snow total in Waterbury (495’) as of 7:00 A.M. EST

 

Sunday, January 18th, 2009:  7:00 A.M. update from Waterbury, VT

 

New Snow: 0.9 inches

Liquid Equivalent:  0.08 inches

Snow/Water Ratio: 11.3

Snow Density:  8.9% H2O

Temperature:  12.9 F

Humidity:  49%

Dew Point:  -5.5 F

Barometer:  30.18 in. Hg

Wind:  Calm

Sky:  Light Snow

Storm snow total:  0.9 inches

Storm liquid equivalent total:  0.08 inches

Current snow at the stake:  17 inches

Season snowfall total:  108.4 inches

 

Snow started falling at some point during the overnight, and at the time of my 7:00 A.M. observations it was coming down at light intensity in the form of small (diameter 1-2 mm) flakes.  There was actually a pretty good shot of liquid equivalent (0.08”) in just the 0.9” of snow on the board, due to the way the small flakes settled.  Not long after I’d taken my readings and cleared the snowboard, the intensity of the snow increased substantially and for a moment while I was outside I’d wondered if I’d fully cleaned the snowboard due to the new light covering of snow on it.  For the past 15-30 minutes, the snowfall has been fluctuating between light and moderate intensity, and flake size has also increased with some 3-4 mm diameter flakes in there.

 

J.Spin

 

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Although I’m not sure when our snow started falling to produce the 0.9” by 7:00 A.M., the intensity certainly appeared to have increased for a time during the ensuing hour because at 8:00 A.M. there was another 0.4” on the board.  I’ll try to make some intermediate observations today as time permits:

 

7:00 A.M. – 0.0” on board/T=12.9 F/RH=49%/DP=-5.5 F

8:00 A.M. – 0.4” on board/T=13.1 F/RH=49%/DP=-5.3 F

9:00 A.M. – 0.6” on board/T=13.8 F/RH=49%/DP=-4.6 F

 

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Summary:  1.9” event total in Waterbury (495’) as of 11:00 A.M. EST

 

The snow has been pretty consistent in its light accumulation over the past three hours, with a surprisingly steady 0.2”/hr between 8:00 A.M. and 11:00 A.M.  The average flake size does seem to have increased a bit since this morning, but it doesn’t seem to have changed the rate of accumulation much if at all.  Perhaps the intensity of the snowfall is a bit less and is canceling out any effect of larger flakes, but it’s not obvious at this point.

 

7:00 A.M. – 0.0” on board/T=12.9 F/RH=49%/DP=-5.5 F

8:00 A.M. – 0.4” on board/T=13.1 F/RH=49%/DP=-5.3 F

9:00 A.M. – 0.6” on board/T=13.8 F/RH=49%/DP=-4.6 F

10:00 A.M. – 0.8” on board/T=16.0 F/RH=77%/DP=7.7 F

11:00 A.M. – 1.0” on board/T=19.0 F/RH=75%/DP=10.0 F

 

 

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Summary:  2.0” event total in Waterbury (495’) as of 12:00 P.M. EST

 

The snowfall has certain slowed down in the past hour, with just a tenth of an inch of accumulation between 11:00 A.M. and 12:00 P.M.  I think we’re going to head up the mountain for some turns this afternoon, but if we haven’t left by 1:00 P.M. I’ll clear the snowboard and check the liquid etc.  Hourly observations below:

 

7:00 A.M. – 0.0” on board/T=12.9 F/RH=49%/DP=-5.5 F

8:00 A.M. – 0.4” on board/T=13.1 F/RH=49%/DP=-5.3 F

9:00 A.M. – 0.6” on board/T=13.8 F/RH=49%/DP=-4.6 F

10:00 A.M. – 0.8” on board/T=16.0 F/RH=77%/DP=7.7 F

11:00 A.M. – 1.0” on board/T=19.0 F/RH=75%/DP=10.0 F

12:00 P.M. – 1.1” on board/T=21.9 F/RH=70%/DP=11.1 F

 

J.Spin

 

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Summary:  2.2” snow total in Waterbury (495’) as of 7:00 P.M. EST

 

Sunday, January 18th, 2009:  1:00 P.M. update from Waterbury, VT

 

New Snow: 1.1 inches

Liquid Equivalent:  0.09 inches

Snow/Water Ratio: 12.2

Snow Density:  8.2% H2O

Temperature:  23.5 F

Humidity:  80%

Dew Point:  16.3 F

Barometer:  30.00 in. Hg

Wind:  Calm

Sky:  Flurries

Storm snow total:  2.0 inches

Storm liquid equivalent total:  0.17 inches

Current snow at the stake:  18 inches

Season snowfall total:  109.5 inches

 

The snow had stopped here by 1:00 P.M., at which point we’d picked up 2.0 inches from the event.  We were up on the mountain during the mid afternoon in the 1,500’-2,250’ elevation range, and I’d say they’d received about the same amount of snow as we had down here.  Snow started up again here this evening, but it was again light and the accumulation was only a couple tenths of an inch.

 

J.Spin

 

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Monday, January 19th, 2009

 

Summary:  3.7” snow/0.29” L.E. total in Waterbury as of 7:00 A.M. EST

 

Monday, January 19th, 2009:  7:00 A.M. update from Waterbury, VT

 

New Snow: 1.7 inches

Liquid Equivalent:  0.12 inches

Snow/Water Ratio: 14.2

Snow Density:  7.1% H2O

Temperature:  25.2 F

Humidity:  80%

Dew Point:  18.0 F

Barometer:  29.74 in. Hg

Wind:  Calm

Sky:  Flurries

Storm snow total:  3.7 inches

Storm liquid equivalent total:  0.29 inches

Current snow at the stake:  19 inches

Season snowfall total:  111.2 inches

 

We picked up an additional 0.2 inches of snow yesterday evening, but since it was such a minimal accumulation I figured I’d clear the snowboard in the morning.  During the overnight we picked up an additional 1.5 inches of snow, and it’s somewhat fluffier (~7% H2O) than the snow that we were picking up yesterday (8-9% H2O).

 

J.Spin

 

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Summary:  4.4” event total in Waterbury as of 7:15 P.M. EST

 

Monday, January 19th, 2009:  5:00 P.M. update from Waterbury, VT

 

New Snow: 0.3 inches

Liquid Equivalent:  <0.01”

Snow/Water Ratio: N.D.

Snow Density:  N.D.

Temperature:  21.0 F

Humidity:  79%

Dew Point:  13.4 F

Barometer:  29.71 in. Hg

Wind:  Calm

Sky:  Flurries

Storm snow total:  4.0 inches

Storm liquid equivalent total:  0.29 inches

Current snow at the stake:  19 inches

Season snowfall total:  111.5 inches

 

There was no substantial snowfall this morning at the house, but I headed up to the mountain around 1:00 P.M. this afternoon for some skiing with the boys, and by the time we got up to the Timberline base (~1,500’) it was snowing lightly.  Steady light snow comprised of beautiful flakes continued for the first hour that we were there, then we had about a half hour of slightly more intense snowfall before it slowed down to occasional flurries.  The snow had certainly started to accumulate though, and Bolton indicated that they picked up an additional inch with the daytime snow.  By the time we were leaving the mountain at ~4:00 P.M., steady light to moderate snow had started up again, and it was still falling when we got down to the house elevation (495’), albeit at lesser intensity.  It hasn’t seemed worth it to pull out the snow thrower for the ~4 inches we’ve received so far from this weekend’s event, but Ty and I did head out in the driveway this evening with shovels to clean out the berm of snow left by the town plow.  Relative to the snow we sometimes get, there’s actually a decent amount of liquid ( almost 1/3 of an inch) in the four inches of accumulation from this event, so it wasn’t simply a question of pushing around some fluff and moving the snow took a bit of work.  While we were out there, the intensity of the snowfall picked up to the point that there were 0.4 inches of new snow on the snowboard by the time we came back in.  From what I can tell based on the BTV NWS discussion, this current snow is still associated with the big trough/weekend system, so I’ll continue to roll these snowfalls into the single event until the next defined system comes along.  As of 8:00 P.M. the steady light snowfall continues, so we’ll see what the evening delivers.

 

J.Spin

 

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Tuesday, January 20th, 2009

 

Summary:  4.7” snow/0.31” L.E. event totals as of 6:00 A.M. EST

 

Tuesday, January 20th, 2009:  6:00 A.M. update from Waterbury, VT

 

New Snow: 0.7 inches

Liquid Equivalent:  0.02 inches

Snow/Water Ratio: 35.0

Snow Density:  2.9% H2O

Temperature:  16.0 F

Humidity:  83%

Dew Point:  9.9 F

Barometer:  29.80 in. Hg

Wind:  Calm

Sky:  Flurries/Partly Cloudy

Storm snow total:  4.7 inches

Storm liquid equivalent total:  0.31 inches

Current snow at the stake:  19 inches

Season snowfall total:  112.2 inches

 

The snowfall from yesterday evening and the overnight totaled 0.7 inches as of 6:00 A.M. this morning, at which point just flurries were falling at the house.  I could see stars in the sky however, so it was presumably partly cloudy.  In Burlington we’ve had flurries and light snow since I’ve been here this morning, and it appears as though there has been a light accumulation here as well.

 

Based on the BTV NWS discussion, it sounds like these upslope snow showers associated with the trough will continue through today/tonight:

 

“TONIGHT...PERIOD OF VERY LIGHT UPSLOPE SNOW WL DIMINISH BY 02Z AS DEPTH OF LLVL MOISTURE DECREASES AND SFC HIGH PRES RIDGE BUILDS INTO OUR FA.”

 

I’ll cut off adding accumulations to the current event with the entrance of the surface ridge Tuesday night into Wednesday, and then pick up with a new event on Wednesday should we get anything from the next vortex that drops into our area.  Then it looks like a weak mid/upper level ridge will come through on Thursday with more chances for snow in the Thursday/Friday timeframe.

 

These periods are some of the toughest to break up into individual “events” because there aren’t necessarily well-defined systems, and with the contribution of moisture from the Great Lakes there just seems to be on and off light snow/flurries for a number of days.  At least there’s a little something to measure on the snowboard each round, and the continued snow and below-freezing temperatures really keep the local slopes in prime form.

 

J.Spin

 

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Wednesday, January 21st, 2009

 

1/18/2009-1/21/2009 Event Summary:  4.9” snow/0.31” L.E.

 

Wednesday, January 21st, 2009:  6:00 A.M. update from Waterbury, VT

 

New Snow: 0.2 inches

Liquid Equivalent:  N.D.

Snow/Water Ratio: N.D.

Snow Density:  N.D.

Temperature:  -5.3 F

Humidity:  68%

Dew Point:  -16.8 F

Barometer:  29.91 in. Hg

Wind:  Calm

Sky:  Clear

Storm snow total:  4.9 inches

Storm liquid equivalent total:  0.31 inches

Current snow at the stake:  18 inches

Season snowfall total:  112.4 inches

 

I found a tenth of an inch of snow on the snowboard when I got home yesterday evening, and I cleared it but didn’t take the time to collect other observations.  There was some flurry/light snow action around last night as well, and this morning I found another tenth of an inch of snow on the board.  With those two accumulations, things had cleared out as the NWS suggested, so I’ll make that the end of the weekend event and should there be any accumulation at our elevation, I’ll start a new event for this next upper level trough that the BTV NWS is discussing this morning:

 

“A WEAK UPPER LEVEL TROUGH OF LOW PRESSURE WILL MOVE ACROSS EASTERN CANADA TODAY. THIS FEATURE WILL SPREAD CLOUDS AND SOME LIGHT SNOW SHOWERS INTO THE NORTH COUNTRY.”

 

Following that it looks like our next event will be on Friday/Saturday:

 

“IT WONT BE UNTIL SHORTWAVE TROUGH MOVES EAST ON FRIDAY AND SURFACE LOW APPROACHES THAT CHANCES WILL INCREASE FOR SOME LIGHT SNOW IN THE AFTERNOON.  ...WEAK SFC LOW PASSES OVER NORTHERN PORTIONS OF THE CWA FRIDAY NGT INTO SATURDAY MORNING. EXPECTING LGT SNOW TO CONTINUE OVERNGT...BUT BEGIN TO DIMINISH FROM S TO N AS SFC LOW SHIFTS EAST DURING THE MORNING SATURDAY...SETTING UP NORTHERLY WRAP-AROUND FLOW. THIS WILL KEEP NORTHERN ZONES W/ -SW FOR REST OF DAYLIGHT HRS.”

 

J.Spin