Tuesday, January 18th, 2011

 

 

Event totals: 4.2” Snow/0.49” L.E.

Tuesday 1/18/2011 6:00 P.M. update: It wasn’t snowing in
Burlington this morning in the 6:30 to 7:00 A.M. range, and I didn’t see when it started, but by 8:00 A.M. or so it was coming down. There were some big flakes at times during the day, but even by later in the afternoon it didn’t seem like more than 2 or 3 inches had accumulated. At the Waterbury Park and Ride at around 5:45 P.M. I found a similar 2 to 3 inches of snow on my car, but boy was it coming down! It was pouring snow at over an inch an hour, hard enough that I couldn’t tell until the very last minute where to turn off for our road. It must have been part of that big burst that Powderfreak showed on the radar and mreaves was riding in. I found 4.2 inches of snow on the snowboard at 6:00 P.M., and it actually seemed pretty dry and fluffy, but it was secretly very dense. It contained 0.49 inches of liquid and came in at a ratio of 8.6 to 1 (11.7% H2O). If I’d had to guess the density on that stuff I would have been quite off the mark. It’s been snowing on and off since then, with some big flakes at times, but nothing of the intensity I saw when I first got home. As of 9:00 P.M. there was another half inch of snow on the board of what seems like the same density material. I haven’t seen any sleet around here; as of 9:45 P.M. it’s been all snow, but clearly there’s a bit of sleet in the north based on the reports here.

We’re flirting with the century mark for snowfall now at this location and we’re definitely staying ahead of average. I’d say we’re a couple weeks ahead because it looks like my numbers put the average date for 100 inches at some point around the first week of February.

Some details from the 6:00 P.M. observations are below:

New Snow: 4.2 inches
New Liquid: 0.49 inches
Snow/Water Ratio: 8.6
Snow Density: 11.7%
Temperature: 23.2 F
Sky: Heavy Snow (2-10 mm flakes)
Snow at the stake: 18.0 inches

 

 

Wednesday, January 19th, 2011

 

 

Event totals: 4.9” Snow/0.59” L.E.

Wednesday 1/19/2011 6:00 A.M. update:  Since the last round of observations at 6:00 P.M. we’ve had 0.7 inches of additional snow, and I haven’t seen any mixed precipitation in the air or detected any sign of it on the snowpack.  The density of this last round of snow was quite high at 14.3% H2O, but it seems to be just dense snow.  The air temperature was 27.0 at observation time, and had that feel that it could produce some mix/freezing mist if it wanted.  Roger Hill indicated that we’ll have another impulse of snow coming through today, and I can see it building on the radar off to our west.  The NWS says any threat of mixed precipitation will be ending as any warmth in the low and mid levels of the atmosphere cools.

 

Some details from the 6:00 A.M. observations are below:

New Snow: 0.7 inches
New Liquid: 0.10 inches
Snow/Water Ratio: 7.0
Snow Density: 14.3% H2O
Temperature: 27.0 F
Sky: Light Snow (1-5 mm flakes)
Snow at the stake: 18.0 inches

 

 

I just checked the snowpack now that I’m in Burlington, and here at UVM there is a slight (1-2 mm) crust on the surface.  It’s fairly crème brûlée as I call it, and wouldn’t be a factor for snow-related activities, but it looks like they did get a touch of mixed precipitation in this part of the Champlain Valley.

 

 

Event totals: 5.4” Snow/0.63” L.E.

Wednesday 1/19/2011 6:00 P.M. update:  It snowed much of the day in Burlington, but I’m not sure how much it accumulated.  I’d say the same sort of thing went on here, but the snow we did get is definitely fluffier than it had been.  There’s still been some snow falling outside, and while it hasn’t been substantial in terms of accumulation, the radar suggest that there’s more coming in from the west.

 

Some details from the 6:00 P.M. observations are below:

New Snow: 0.7 inches
New Liquid: 0.04 inches
Snow/Water Ratio: 17.5
Snow Density: 5.7% H2O
Temperature: 19.2 F
Sky: Light Snow/Flurries
Snow at the stake: 18.0 inches

 

 

Thursday, January 20th, 2011

 

 

Event totals: 6.3” Snow/0.63” L.E.

Thursday 1/20/2011 6:00 A.M. update:  After reading the past several BTV forecast discussions, I couldn’t quite break this current snowfall out from the Tuesday system, since it was just a weak embedded 5H Vort, it sounds like it’s been working on leftover moisture, and there’s been some upslope flow.  I grabbed some text from one of the evening/overnight discussions:

 

CRNT RADAR SHOWS AN AREA OF VERY LIGHT SNOW ACRS WESTERN/NORTHERN NY...MOVING TWD THE CPV. THIS COMBINED WITH SOME LLVL LAKE MOISTURE INTERACTION AND LEFTOVER RIBBON OF ENHANCED 850 TO 500MB RH...WL CONT TO PRODUCE SOME VERY LIGHT SNOW ACRS OUR REGION THRU 09Z TONIGHT...BEFORE BEST RH LIFTS INTO EASTERN VT AND NH. IN ADDITION...SOME WEAK UPSLOPE FLW ON NORTHERLY WINDS WL HELP TO ENHANCE LLVL LIFT...BUT FLW IS WEAK AND OVERALL LLVL OMEGA IS MINIMAL. GIVEN BIG FLUFF FACTOR A DUSTING TO AN INCH OR SO...STILL LOOKS REASONABLE.

 

There was still light snow falling at the house this morning, and it’s the same here in Burlington, so I suspect there will be one more observation to report with this event before the focus moves on to the next system coming in tonight into Friday.  Our point forecast and the latest NWS discussion both suggest a few inches with that one for this area.

 

Some details from the 6:00 A.M. observations are below:

New Snow: 0.7 inches
New Liquid: Trace
Temperature: 15.4 F
Sky: Light Snow (2-10 mm flakes)
Snow at the stake: 18.5 inches

 

 

Event totals: 6.5” Snow/0.63” L.E.

Thursday 1/20/2011 6:00 P.M. update:  We picked up another 0.2 inches of snow today and a trace of liquid, and this will be the final entry for the midweek event.  We are under a winter weather advisory for the next event, which is expected to start late tonight.

 

Some details from the 6:00 P.M. observations are below:

New Snow: 0.2 inches
New Liquid: Trace
Temperature: 17.1 F
Sky: Cloudy
Snow at the stake: 18.0 inches