When a very cold continental polar air mass moves over the Great Plains the air

Question

When a very cold continental polar air mass moves over the Great Plains the air mass can be expected to modify by:

A. Cooling down and drying significantly

B. Warming up and drying significantly

C. Cooling down and continuing to stay dry

D. Warming up and continuing to stay dry

  E. None of the above

Please explain…………………………………………………………….

Although Chicago, IL is adjacent to Lake Michigan, why does Chicago not get as much lake effect snow compared to other cities adjacent to the Great Lakes (e.g. Buffalo, NY)?

A. Air is generally warmer

B. Wind direction is often not favorable for lake effect snow

C. There is a lack of jet stream divergence

D. Higher air pressure

   E. None of the above

Please explain…………………………………………………………….

Explanation / Answer

1. When a very cold continental polar air mass moves over the Great Plains the air mass can be expected to modify by:

Answer. Cooling down and drying significantly

Explanation:

The air mass that is responsible for winter cold waves that sweep across the Great Plains is continental Arctic (cA).

2. Although Chicago, IL is adjacent to Lake Michigan, why does Chicago not get as much lake effect snow compared to other cities adjacent to the Great Lakes (e.g. Buffalo, NY)?

Answer: Wind direction is often not favorable for lake effect snow

Explanation: The Milwaukee Reef, running under Lake Michigan from a point between Milwaukeeand Racine to a point between Grand Havenand Muskegon, divides the lake into northern and southern basins. Each basin has a clockwise flow of water, deriving from rivers, winds, and the Coriolis effect. Prevailing westerly winds tend to move the surface water toward the east, producing a moderating effect on the climate of western Michigan. There is a mean difference in summer temperatures of 5 to 10 degrees Fahrenheit (2 to 5 degrees Celsius) between the Wisconsin and Michigan shores.

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