Standard Conditions and Density Altitude
150 C (590 F)
What is the definition of a convective current?
uneven heating of the air creates small
areas of local circulation
Define relative humidity
the amount of water vapor present in the atmosphere at a given time
BR on a METAR stands for
Mist
What does density altitude measure?
Air density
What is turbulance?
Bumpy air
Define dew point
the temperature which air cannot hold more moisture
Runway 04, visibility is 2,200 ft
Higher density altitude generally leads to...
Reduced engine power
Where do downdraft typically occur?
Over water
Radiation fog is most likely found near what
bodies of water
RAB35 means
Rain began 35 min past the hour
How do higher temperatures affect density altitude?
They increase density altitude
What is a wind shear?
is a change in wind speed and / or direction over a short distance
Radiation Fog
The wind direction an velocity at KJFK is 18004KF what does this mean
180° true at 4 knots
What condition can lead to a lower density altitude?
Higher humidity
Over what surface does an updraft typically occur?
Plowed land & sand (ex. pavement)
When does frost form?
When the dew point is lower than 32°F
The current conditions for Chicago Midway Airport (KMDW) are 1-1/2SM RA OVC007, this means
Sky 700 ft overcast, visibility 1-1/2SM, rain