Step 2 of 8
Living Snow Fence Case Study: Gaylord, MN
  Introduction
  Snowfall
Wind Direction
  Fetch Distance
  Snow Water Equiv.
  Snow Transport
  Porosity
  Attack Angle
  Setback
  Conclusions
  References



Prevailing wind direction and the wind direction of greatest potential snow transport are needed to calculate the attack angle later.

The first table on the right gives the prevailing wind direction for each of the winter months, and the overall prevailing winter wind direction, 190 degrees, or S.
See a degrees vs. cardinal direction table.

The second table on the right gives the potential snow transport (Qupot). The direction of greatest snow transport is 300°, or WNW.

The prevailing wind direction in this case should be taken as 300°, or WNW, because, contrary to the modal direction from above, it represents the direction of greatest snow transport and is therefore more useful to the snow fence design.


 

Prevailing Wind Direction
Oct Nov Dec Jan Feb Mar Oct - Mar
190 190 300 310 300 190 190

Direction Qupot (kg/m)
10 956
20 4008
30 5921
40 546
50 5648
60 1275
70 1912
80 0
90 0
100 0
110 137
120 273
130 0
140 2186
150 1639
160 683
170 683
180 1776
190 3097
200 410
210 0
220 273
230 137
240 0
250 137
260 1503
270 7833
280 7559
290 4964
300 13930
310 410
320 410
330 0
340 0
350 0
360 0
Total = 68304
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