AVIATION WEATHER

1
AVIATION WEATHER

• FOG

2
(No Transcript)
3
(No Transcript)
4
Do you see the river?
Advection fog
Which way is the wind blowing?
5
I see the ocean.
What direction is the wind blowing?
Hello, little airplane.
Where are you going to land?
Can this be radiation fog?
Probably not, clouds in sky.
Can this be advection fog?
Possibly, if there is lots of water nearby.
6
Lets move closer to the ocean.
7
We have moved closer to the ocean.
So has the little airplane.
Advection fog
8
Oh my! Oh dear! What is he going to do?
9
Radiation fog rising upslope with the heat of
the morning and will become stratus clouds (if
stable air) or cumulus clouds (if unstable air)
10
Radiation Fog
11
Radiation Fog
12
Radiation fog
13
Steam fog
14
Steam Fog
15
Steam fog
16
Upslope fog and radiation fog
17
Upslope fog
18
(No Transcript)
19
See the clear sky required for radiation fog?
See the river needed for steam fog?
Combination steam fog, radiation fog, and
advection fog
Which way is the wind blowing for advection fog?
20
Advection Fog
What is the wind direction?
What time of day is it?
Morning
21
Clear sky for radiation fog.
Which way is the wind blowing for advection fog?
See the lake?
What time of day is this likely to be?
Morning, the land is cooler than the water.
22
Steam fog
23
Rain fog rain cooled forest floor and moisture
from rain also evaporated from ground.
24
Steam Fog
25
Rain fog rain cooled forest floor and moisture
from rain also evaporated from ground.
26
Radiation fog hot air rose during cloudless
night colder heavier air sank down to river
valley. Steam fog helped from evaporating river
water.
27
Condensation nuclei smoke and dust sticking to
moister in air
28
Steam fog and radiation fog
29
Upslope fog
30
Whale fog
31
Its morning the land is cooler than the water.
The warm, moist air is advancing from the water
over the cooler land advection fog
What direction is the wind blowing?
Steam fog and radiation fog combination
32
Steam fog (water evaporation adding moisture to
air)
Upslope fog (moist air cooling as it goes uphill
to lower temperatures)
Advection fog (moist air from water advancing
over cooler land)
Radiation fog (clear sky)
What is the wind direction?
What time of day is it?
Morning
33
Golden Gate Bridge fog
34
http//virtualskies.arc.nasa.gov/weather/tutorial/
tutorial1.html