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FOEHEN WINDS
Image by fpic,gdl
1
What are there conditions
• FOEHN winds events on the western side
.
• Typically occurred as southeasterly wind
developed ahead of a low pressure
system.
• The wind events on the eastern side were
typically the result of northwesterly winds
behind the passage of a shallow cold front.
How long do FOEHN winds last
•
•
•
FOEHN winds can melt and evaporate a
foot 0.3 meters of snow.
The winds can at least last a day or more.
This wind has the same force of some
hurricane winds.
Do FOEHN winds make
distinction
• The temperature gets less and a strong
shift and increase in wind speeds.
• Although these winds may on occasion
reach destructive velocities on beneficial .
• Aspect is that these winds quickly disperse
the sever air pollutants that plague the LOS
ANGELES basin .
Image by fpic,gdl
What do they look like from sat
alight
•
•
There big huge
•
clouds .
These satellite
•
images show cold
fronts warm fronts
and occlusion
band crossing
mountain ranges .
By Meteosat 9 wv7
There big huge
clouds .
These satellites
images show cold
front warm front
and occlusion
band crossing
mountain ranges .
6
How do they get warm
•
It is warmed by as •
it encounters the
greater pressures
of lower altitudes . •
By Meteosat 9 wv7
The image that
you see is by the
UTC
A picture of
FOEHN winds in
the mountain
ridges in N. Spain
.
7
DO THEY CAUSE FIRES
•
•
Yes they do in
southern
California are an
example of
FOEHN winds
that caused large
forest fires .
Finally if the warm
FOEHN winds
By Meteosat 9 wv7
occur after spring
8
What are they similar to
• FOEHN winds are
very similar to
origins the Chinook
occurs on the east
slopes of several
large mountain
ranges in the
western united
states .
By Meteosat 9 wv7
9
How are FOEHN winds made
•
FOEHN winds are produced when a large
scale circulation is strong and deep to
force air over major mountain ranges in a
short period of time .
•
By Meteosat 9 wv7
10
By Meteosat 9 wv7
11