Exam 12: Middle-Latitude Cyclones

An upper-level trough that shows retrograde motion would be moving toward the ____.

On a 500-mb chart, shortwave troughs can be difficult to detect. However, one way to identify them is to find regions of ____, with which shortwaves align themselves.

In the Southern Hemisphere, convergence and divergence play no roles in the development of middle latitude cyclones.

On an upper-level chart where the isotherms cross the isobars (or contours)and temperature advection occurs, the atmosphere is called ____.

Cyclogenesis can occur in regions without a large horizontal temperature gradient.

Vorticity can be observed by satellites, even during cloudy conditions.

Outline the development of the superstorm of March 1993.

Outline some noteworthy features of the northeaster of January 22-24, 2016.

Generally, a polar low's development is enhanced if an upper trough lies to the west of the surface system and a ____ disturbs the flow aloft.

The ____ type of clouds indicate that a storm is still developing and intensifying.

Atmospheric shortwaves usually move ____ longwaves, and ____ when they move through a longwave ridge.

Lee-side lows are ____.

Explain the relationship between the polar jet stream and development of cyclones.

In general, at the 500-mb level, the vorticity maximum and the shortwave move along at about ____________________ the speed of the wind.

A zone of organized clouds with precipitation can form in conjunction with a vorticity maximum, even in the absence of fronts.

Northeasters (or nor'easters)are mid-latitude storms commonly found along ____.

Generally, polar lows rapidly ____ when they move over land.

Earth's vorticity is always positive because the Earth spins ___________________ about its vertical North Pole axis.

During baroclinic instability, a ____________________ lows often appear as single contour lines on an upper-level chart.

Define the conditions under which cyclones would die out soon after they form.