Surface Base Layers

Question 1

Fog

Answer 1

A cloud that is contact with the ground

Stratus clouds

Question 2

Fog key ingredients

Answer 2

Moisture hight humidity

Some condensation

Very light surface winds

A cooling process to get the condensation going

A process to adds moisture to get condensation going

Question 3

Fog types

Answer 3

Radiation
Advection
Upslope
Frontal
Steam
Ice

Question 4

Radiation fog

Answer 4

Formed by radiation cooling nights where the relative humidity is high and light winds are present

Question 5

Advection fog

Answer 5

Formed by the horizontal movement of warm moist air over colder surface

Common coastal areas

Common in during winter warming periods and early spring thaws

Question 6

Upslope fog

Answer 6

This is when moist air moves up raising terrain

An easterly wind flowing across the plains can
Cause
Upslope fog

Question 7

Frontal fog

Answer 7

Continuos a precipitation ahead of a warm front falla into colder air below

As the rain evaporates saturation occurs causing fog

Question 8

Steam fog

Answer 8

Also known as artic sea smoke , forms by water vapour being added to air

As the excess water vapour condenses a fog or mist will form

Question 9

Ice fog

Answer 9

Sometimes will form when the temp are significantly below zero

Question 10

Mist or fog?

Answer 10

If the visibility meets or exceeds 5/8 of a mile it’s MIST
BR abbreviated

We will call it fog if visibility falls below 5/8 of a mile

FG abbreviated

5/8 SM = 1KM

Question 11

Haze

Answer 11

Forms on days with high temp and high humidity

Milky or smoke appearance

Smoke can reduce visibility to zero

Question 12

Vertical visibility (VV) is reported in a Metar it will be considered as a ?

Answer 12

VFR ceiling

Question 13

White out is?

Answer 13

Weather condition in which visibility and contrast are severely reduced by snow or sand . Horizon disappears