Weather Quiz 4

Question 1

Advection Fog

Answer 1

moist air over cold surface
wind direction important
deepens with wind up to 15kts
could be warm air over cold water (san Fransisco)

Question 2

upslope fog

Answer 2

moist, stable air lifted and adiabatically cooled up sloping terrain
common in early morning
5-15kt wind

Question 3

Steam fog

Answer 3

cold air over warm water
water evaporates then condenses with convective air
needs shallow layer of unstable air

Question 4

mist

Answer 4

if visibility is +1000m
5/8 to 7 mile visibility

Question 5

haze

Answer 5

suspension of small, dry particles

Question 6

radiation fog

Answer 6

radiation cooling reduces air to dew point
shallow fog
depends with wind up to 5kts

Question 7

frontal fog

Answer 7

warm air lifted over front
common with warm front

Question 8

sea breeze

Answer 8

coastal local wind
Sea to land
calm sunny, summer days
land heats faster than water - warm air rises and lower colder air moves in

Question 9

land breeze

Answer 9

land to sea
develop in PGF
weaker than sea breeze
reverse of sea breeze

Question 10

Lake breeze

Answer 10

in afternoon, spring/summer
shallow end less effective than deep end

Question 11

valley breeze

Answer 11

wind ascends mountain during day
air touching mountain heats faster
creates low pressure pushing wind valley to upward

Question 12

mountain breeze

Answer 12

nightly downslope winds
air on mountain cools faster

Question 13

when will radiation fog form (time of day)

Answer 13

overnight or early morning

Question 14

most common type of fog

Answer 14

radiation fog

Question 15

clockwise wind

Answer 15

veering wind

Question 16

backing wind

Answer 16

counterclockwise wind

Question 17

diurnal variation

Answer 17

winds stronger during day
winds aloft can be transferred to surface in instability

Question 18

Where does CAT normally exist

Answer 18

sharp upper trough or sharp upper ridge of jet stream
Northern portion of surface low

Question 19

dew point depression for haze

Answer 19

greater than 3F

Question 20

what causes blowing sand / dust

Answer 20

thunderstorm outflows
strong pressure gradients

Question 21

signs of flying through ash

Answer 21

thunder and lightning
St Elmo’s fire

Question 22

chinook winds

Answer 22

downsloping winds warm on descent

Question 23

santa ana winds

Answer 23

downslope winds are warm and hot
get funneled through mountain passes

Question 24

turbulence along thunderstorm is

Answer 24

moderate or severe

Question 25

turbulence along frontal boundary will be

Answer 25

light or moderate

Question 26

turbulence in strong/gusty low level winds are

Answer 26

light or moderate