Factors contributing to fog formation

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Which region is least likely to experience dust within 24 to 36 hours after a rainstorm?

Coastal areas

Deserts (correct)

River flood plains

Agricultural areas

What creates an environment rich in fine-grained soil that can be picked up by seasonal winds in agricultural areas?

Rapid evaporation

Heavy rainfall

Abundance of vegetation

Mechanical breaking of soil (correct)

In which region can dust plumes be generated in advance of cold fronts moving across sandy or silty coastal regions?

Agricultural areas

Deserts

River flood plains

Coastal areas (correct)

What can lead to increased dust potential beyond 36 hours after a rainstorm?

Runoff after heavy rain Signup and view all the answers

What kind of land is a potential source area for dust due to the mechanical breaking of soil?

Fallow or recently tilled agricultural land Signup and view all the answers

What weather condition becomes more likely when temperatures fall below -10°C?

Drizzle Signup and view all the answers

Where is frozen precipitation like light snow or sleet more likely to occur?

Below -10°C Signup and view all the answers

What role does a wet surface play in fog formation?

Reduces the dew point of the planetary boundary layer Signup and view all the answers

What role do cloud condensation nuclei (CCN) play in freezing drizzle occurrence?

Prevent freezing drizzle from occurring Signup and view all the answers

In what type of clouds does freezing drizzle almost always fall from?

Stratiform clouds Signup and view all the answers

What type of winds are detrimental to fog formation?

Winds greater than 10 knots Signup and view all the answers

At what cloud depth is the microphysical process required for freezing drizzle to function efficiently?

200 meters Signup and view all the answers

In which fog type are surface winds less than 10 knots crucial?

Radiation fog Signup and view all the answers

Where is the moisture associated with freezing drizzle usually found in the atmosphere?

Below 700 mb Signup and view all the answers

How does dry air with relative humidity less than 50% above the surface influence fog?

Aids in radiation fog development Signup and view all the answers

Which of the following is NOT a characteristic of advection fog?

Forms with winds greater than 10 knots Signup and view all the answers

Why is a wet surface particularly important for radiation fog formation?

It assists in achieving saturation in the air & reduces the dew point of the PBL. Signup and view all the answers

What is the main difference between frontal dust storms and shamals?

Frontal dust storms cover a large distance while shamals are localized (this was backwords) Signup and view all the answers

What are the three major varieties of frontal dust storms?

Prefrontal, postfrontal, and shear-line Signup and view all the answers

What is the characteristic wind speed range for prefrontal dust storms on average?

10 - 20 knots (i've had to correct the last 3 of these mother fuckers) Signup and view all the answers

In what months are easterly to southerly prefrontal winds favored for prefrontal dust storms?

October and November Signup and view all the answers

What do the polar front jet stream and subtropical jet stream converge into during prefrontal dust storms?

Single jet streak (or jet max) Signup and view all the answers

Why are prefrontal dust storms difficult to detect in METSAT imagery?

They are frequently obscured by terrain shading Signup and view all the answers

What factor most closely correlates with the duration of freezing drizzle?

Cloud depth Signup and view all the answers

Which layer in the atmosphere is mentioned as the dendritic layer in the text?

-10°C to -20°C Signup and view all the answers

What is the influence of ground temperature on falling precipitation before it reaches the ground?

It has no little influence Signup and view all the answers

Under what conditions does liquid precipitation become characterized as freezing rain?

When the ground temperature is 0°C or less Signup and view all the answers

What happens to liquid precipitation if it falls through a sub-freezing layer but lands on a surface with a ground temperature above 0°C?

It remains as rain Signup and view all the answers

How does ground temperature influence the character of sleet?

It melts ice pellets if above 0°C Signup and view all the answers