ATMS 120: SU 2017 ATMOSPHERIC SCIENCES Snodgrass Part#2: Track of a WinterStorm

Question

ATMS 120: SU 2017 ATMOSPHERIC SCIENCES Snodgrass Part#2: Track of a WinterStorm or extra-tropical cyclone). The begins and tracked toward the east coast along this arrow. Answer the following questions a map with a black arrow that represents the path of a low-pressare system (ie., winter storm. low-pressure system formed just east of the Rocky Mountains where the arrOW 1. Shade in on this map where you would expect to find snow falling along this low-pressure system's track 2. What is the name of a winter storm that follows this track? What type of precipitation should Chicago, IL expect when a low-pressure system follows this track in winter? 3. Part 83: Liquid to Snow Ratio Many of you have probably heard that an inch of rain would make a foot of snow if it were cold enough to snow This statement is referring to a term/phrase in meteorology that is used all winter long called the "Liquid to Snow Ratio" When weather models predict the total amount of precipitation, it is always done in "inches of liquid equivalent". In other words, the models predict the total amount of water in liquid form that can be precipitated from the atmosphere for a given weather event. Mcteorologists turn these values into snowfall totals by applying a "Liquid to Snow Ratio. The most common ratio is 1:10 but the colder the air is when it snows, the higher the ratio. Imagine a winter storm was heading for Champaign and the forecast models predicted we would get 0.8 inches of liquid equivalent precipitation. Use the liquid to snow ratios for each temperature range given below to calculate the total snow depth in inches. Write your answer in the space to the right of each scenario. Scenario #1 : The temperature will be 30°F and the ratio is l:7 Scenario #2: The temperature will be 24°F and the ratio is 1:10 Scenario #3: The temperature will be 16°F and the ratio is 1:15. Scenario #4: The temperature will be 8°F and the ratio is 1.2 o 2017 Dept. of Atmospheric Sciences, University of Illinois-Urbana Champaign

Explanation / Answer

1. Along this low pressure's system track, we may expect the snow fall to occur in the states of New York, Illinois, Ohio, Colarado, Missouri, Indiana, Kansas and Pennsylvania.

2. The winter storm that follows this track is known as Blizzard. In 2006 in the month of October there was an usual lake storm 'Aphid' that occurs in Buffalo, New York and other adjoining parts of US and Canada. Another storm was Colorado holiday Blizzard that occur Denver, Colorado area of United States. This blizzard occurs in two segments during the last two weeks of December in 2006. Snowmaggedon and Snowzilla are the winter storms that occur in US and United Kingdom.

3. In winter when a low pressure system follows this track there may be heavy rainfall in the Chicago. Also there may be snow and heavy dew in the area. The snowfall can be heavy to moderate.

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