Name:___________________________________
ATMS 373
12 February 2014
INDIVIDUAL QUIZ#02
Answer each of the following five questions. The quiz is worth a total of 25 points.
(1) Low clouds produced as a warm front approaches the mountains are often not visible
from the ________ slopes, so that the increasing sky coverage, thickening, and ________
of high- and middle-level clouds are often the best indicators of increasing moisture
associated with an approaching warm front.
(a) lee, raising
(b) lee, lowering, p. 84 of text
(c) windward, raising
(d) windward, lowering
(2) A low pressure center lies south of an east-west-oriented mountain range. Where
relative to the low pressure center (northwest or northeast) would you expect to find areas
of enhanced precipitation along the mountain range? Assume that the location shown is
in the Northern Hemisphere. Be sure to give brief reasons that support your answer.
Flow about a low pressure center is counterclockwise in the Northern Hemispere,
so the upslope flow would be happening northeast of the surface low for the given
orientation of the mountain range. {p. 85 of text}
(3) ________ clouds indicate moisture in moderately to strongly ________ layers, are
associated with strong winds in the mountains, and are shaped like lenses.
(a) Rotor, unstable
(b) Rotor, stable
(c) Lenticular, unstable
(d) Lenticular, stable, p. 87, 89 of text
(4) Describe briefly the vertical wind and temperature conditions that give rise to billow
clouds. Recall that these clouds are associated with Kelvin-Helmholtz waves.
They form when vertical wind shear (change of wind speed, wind direction, or
both, with height) occurs across a sharp change in temperature in a cloudy atmosphere
{p. 92 of text}
(5) After a rainstorm occurs in Asheville, ________ fog is often observed when moist air
is lifted and cooled by winds blowing up the sides of nearby foothills and mountains.
(a) upslope, p. 95 of text
(b) radiation
(c) advection
(d) ice