After filling in a dot at each appropriate intersection of rainfall (in inches) and the day of the week, you can use a ruler to connect the dots and see the fluctuations in the rain measurement for that week. as its a direct weight comparison between snow and water and its a measurement done by volume so its the weight of snow based on weight for a specific volume. Rainfall is measured by the depth of water within a rain gauge, giving it merely a one-dimensional aspect. For those who measured close to 70 mm of rain on Sunday, at the coast where the water content of the snow … The snow from each event melts off before the next accumulation and no snow is on the ground at your scheduled time of observation. This is the depth of water that would result from melting a sample of snow. Baker in Washington state during the snow season of 1998–99. Snow varies in density depending on temperature and water content. Generally, every 10-12 inches of snow will yield one inch of rain. You might also be interested in our water weight calculator. The most common types of precipitation released from clouds are rain, drizzle, snow, sleet, snow pellets, ice pellets, snow grains, hail, ice rain, and ice needles. Convert 20 cm to inches: d (″) = 20cm / 2.54 = 7.874″ Centimeters to inches conversion table. Calculate the water volume of snow using these easy steps. On average, 10 centimeters on snow contains the same amount of water as 5 centimeters of rain. The colder side of the weekend Nor’easter dumped as much as 60 cm of snow over New Brunswick’s Acadian Peninsula, while Trafalgar, N.S., reported 114 mm of rain. On average, two feet of snow can equal up to 19 tons of weight on your roof, which can significantly weaken the structure. Answer: 24 inches of snow x (1 inch water/10 inches of snow) = 2.4 inches of water. 25 mm = 25 cm for warm storms. The calculated data is based on information from the National Weather Service that indicates the average snowfall is in a ratio of 10 inches of snow to 1 inch of equivalent rainfall. C. At the other extreme, the snow can be heavy and wet resulting in a snow to liquid ratio of around 5 to 1 (i.e. Snow water equivalent (SWE) is a measure of the volume of water contained in snow over an area. Water has a density of 1 kg/L. Wet snow has a density of 24.97 to 51.82 pounds per cubic foot. This is where the infamous “10-to-1” ratio has its roots. Heavy, wet snow has a very high water content and 4 or 5 inches of heavy, wet snow can contain about one inch of water, while it may take 20 inches of dry, powdery snow to equal one inch of water. In the U.S., on average, an inch of rain produces about 13 inches of snow. The ice storm caused over 200,000 people to lose power. In order words, a snowstorm with 16 inches of snow would only amount to 2 inches of rain. During that storm the snow ratio was closer to 15 inches of snow to one inch of rain. More Severe Weather … A. The colder the snow the less water it will hold because, the colder the air, the more water it can hold. ... 1 mm of snow in liquid equivalent can be equated with 1-1.5 cm of snow cover. So, 10 mm of rain is equal to about five cm of snow here. Please plan for intermittent disruptions to MetEd during this period of time. The rain falls and is funneled into a narrow tube, sometimes one-tenth the diameter of the top of the gauge. Note that rounding errors may occur, so always check the results. Blowing Snow: Wind-driven snow that reduces visibility and causes significant drifting. More densely packed and wet snow is in the ratio of 8 inches of snow to 1 inch of equivalent rainfall, and more powdery snow is … An inch of snow falling evenly on 1 acre of ground is equivalent to about 2,715 gallons of water. Example. Step Two: Estimate the Snow Density. Fresh light and fluffy snow will weight much less than the dense, packed, or wet variety. Although this calculation is simple in principle, the units can make it a headache. What to Measure •Snowfall –Maximum amount of new snow that has fallen since the previous observation •Snow Depth –The total depth of ALL snow, including sleet, on the ground at 1200 UTC •Snowfall Water Content –The liquid water content of new snow in the rain gauge since the previous observation (1200 or 0000 UTC) Snow varies in density depending on temperature and water content. The “10-to-1” ratio is the assumption that for every 10 inches of snow … Snow to Liquid Ratio (snow/liquid) 1” of snow with 0.12” liquid SLR = 1/0.12 = 8:1 ratio This is the equivalent of 3,630 cubic feet. Either way, you would like to know how much rain has fallen—how many gallons have come down from the skies onto your roof, yard, block, or town. We’re not there yet. Freshly fallen powder generally has a density of 3.12 to 4.37 pounds per cubic foot. For those who measured close to 70 mm of rain on Sunday, at the coast where the water content of the snow would have been high, we could have been dealing with 35 cm of snow. For example, a dry, powdery snow is likely to have a 20:1 or 30:1 ratio...that is, 20 or 30 inches of snow would be equal to 1 inch of rain. Actually since 1 meter=100centimeters, then by converting 3.6 meters to centimeters, we would have 3.6 meters x (100 centimeters/1meter) = 360 centimeters. ›› Quick conversion chart of inches to cm. Learn the density of various types of snow and the formulas to find weight. Snow varies in density depending on temperature and water content. It is the most common way to produce rain from clouds. Wind-packed snow has a density of 21.85 to 24.97 pounds per cubic foot. So, 10 mm of rain is equal to about five cm of snow here. Next, calculate the snow weight by multiplying the volume in cubic feet by the density in pounds per cubic foot. The first step is to estimate the volume of snow, which can be done by multiplying the length and width in feet to find the area, then multiplying by the depth of the snow in feet. Personally, I prefer snow in the winter, but not everyone does. or. Between those two extremes, we were treated to several hours of ice pellets and freezing rain. Are You Planning a Home Improvement Project. Roughly from 1:5 to 1:20, depending on conditions, at low altitudes say 500M or less with warmer temps 1:5 is a reasonable estimate, at say 3,000M this might be as high as 1:20 at 1500M or there abouts it's usually roughly 1:10