NIFE WEATHER
As altitude increases, what happens to pressure? - ANS - Decreases always
As density altitude goes up, what happens to aircraft performance? - ANS - Decreases
Does prevailing visibility need to be continuous? - ANS - No
Explain a sea breeze - ANS - The cooler air over the water moves toward the warmer land.
The air is then heated and rises. Air is then cooled and descends
Explain land breeze. - ANS - Cooler air from land moves over the water, the cool air is heated
and moves upward, it is then cooled and descends
Explain the effect a change in pressure has on the altimeter - ANS - "High to Low, Look out
below"
-Aircraft is going to be lower than indicated on the altimeter when going from a high pressure to
a lower pressure
"Low to High, plenty of sky"
-Aircraft is going to be higher than indicated on the altimeter when going from a low pressure to
a higher one
Explain the effect that a deviation from the standard temperature lapse rate has on the altimeter
- ANS - High to low, look out below
-Flying into colder air, the altimeter will read higher than the MSL
Low to high, plenty of sky
-Flying into warmer air, the altimeter will read lower than the actual MSL
For a preflight weather brief, what do naval aviators need to know? - ANS - Weather in which
you are flying
Use approved military weather forecasters
For saturation to be present, what two things need to equal eachother? - ANS - Temperature
and dew point
How are Air masses named? - ANS - According to their location, moisture content and
temperature relative to the ground
, How are fronts named? - ANS - According to the temperature change in which they bring
How do stations report pressure regardless of location? - ANS - In Sea Level Pressure
How does clear icing occur? - ANS - Large water droplets break apart and freeze to the form
of the airfoil as they spread out
How does rime icing occur? - ANS - Small droplets of water hit the airfoil and instantly freeze
How far do nimbostratus clouds extend down to and what is associated with them? - ANS -
1000' AGL
Poor visibility
Low ceilings
Very slow clearing
How is a temperature inversion a wind shear turbulence? - ANS - At the boundary layer
between the Lapse rate and the temperature inversion, wind shear can be present. The change
causes winds to switch directions and intensities
How is advection fog dissipated? - ANS - Wind shift
How is the type of occluding front determined? - ANS - Determined by which front keeps in
contact with the ground
How long is a METAR good for? - ANS - 1 hour
How long is a TAF used for? - ANS - 24 hours
How long is an AIRMET valid for? - ANS - 6 hours
How will radiation fog dissipate? - ANS - Due to the sun heating up the air and allowing more
moisture to go into it
In a jet stream, where are the strongest winds and what speed are they in excess of? - ANS -
On the inside of the jetstream
250 knots
In a stationary front, what speed and direction do they move and what is their wind shift? - ANS
- They dont move
Wind shift of 180 degrees from either side
In an Air mass, what two things are relatively the same? - ANS - Temperature and moisture
As altitude increases, what happens to pressure? - ANS - Decreases always
As density altitude goes up, what happens to aircraft performance? - ANS - Decreases
Does prevailing visibility need to be continuous? - ANS - No
Explain a sea breeze - ANS - The cooler air over the water moves toward the warmer land.
The air is then heated and rises. Air is then cooled and descends
Explain land breeze. - ANS - Cooler air from land moves over the water, the cool air is heated
and moves upward, it is then cooled and descends
Explain the effect a change in pressure has on the altimeter - ANS - "High to Low, Look out
below"
-Aircraft is going to be lower than indicated on the altimeter when going from a high pressure to
a lower pressure
"Low to High, plenty of sky"
-Aircraft is going to be higher than indicated on the altimeter when going from a low pressure to
a higher one
Explain the effect that a deviation from the standard temperature lapse rate has on the altimeter
- ANS - High to low, look out below
-Flying into colder air, the altimeter will read higher than the MSL
Low to high, plenty of sky
-Flying into warmer air, the altimeter will read lower than the actual MSL
For a preflight weather brief, what do naval aviators need to know? - ANS - Weather in which
you are flying
Use approved military weather forecasters
For saturation to be present, what two things need to equal eachother? - ANS - Temperature
and dew point
How are Air masses named? - ANS - According to their location, moisture content and
temperature relative to the ground
, How are fronts named? - ANS - According to the temperature change in which they bring
How do stations report pressure regardless of location? - ANS - In Sea Level Pressure
How does clear icing occur? - ANS - Large water droplets break apart and freeze to the form
of the airfoil as they spread out
How does rime icing occur? - ANS - Small droplets of water hit the airfoil and instantly freeze
How far do nimbostratus clouds extend down to and what is associated with them? - ANS -
1000' AGL
Poor visibility
Low ceilings
Very slow clearing
How is a temperature inversion a wind shear turbulence? - ANS - At the boundary layer
between the Lapse rate and the temperature inversion, wind shear can be present. The change
causes winds to switch directions and intensities
How is advection fog dissipated? - ANS - Wind shift
How is the type of occluding front determined? - ANS - Determined by which front keeps in
contact with the ground
How long is a METAR good for? - ANS - 1 hour
How long is a TAF used for? - ANS - 24 hours
How long is an AIRMET valid for? - ANS - 6 hours
How will radiation fog dissipate? - ANS - Due to the sun heating up the air and allowing more
moisture to go into it
In a jet stream, where are the strongest winds and what speed are they in excess of? - ANS -
On the inside of the jetstream
250 knots
In a stationary front, what speed and direction do they move and what is their wind shift? - ANS
- They dont move
Wind shift of 180 degrees from either side
In an Air mass, what two things are relatively the same? - ANS - Temperature and moisture
