6. When the snow is blown about after the storm and before measurements
have been made.
A bucket and a spring balance are used. The bucket is filled with snow,
but not packed down too hard, and weighed. The reading of the index hand
on the spring balance gives the density of the snow. The depth of the
snow in the vicinity of the spot from which the bucket was filled is
obtained and this figure is multiplied by the density, thus giving the
water equivalent of the snow collected. For instance, if the reading of
the balance was .16, and the depth of the snow was 7 inches, multiply
.16 by 7, and the result, 1.12, is the water equivalent of the snow.