Weather Flashcards
Low to high
look to the sky (holding an altitude will actually take you up)
High to low
look out below (opposite)
Standard lapse (<36,000 MSL)
1000ft = 1” hg = 2 degrees C
low pressure (warm) aka
cyclone (ccw rotation)
high pressure (cold) aka
anticyclone (cw rotation)
trophosphere altitude
<36,000 msl
Standard day temperature
59f (15c)
Standard day pressure
29.92” hg
Dewpoint & temperature converge at
4.4 degress F per 1,000 feet.
Wind shear risk
winds 25kts+ In (1) temperature inversions, (2) frontal zones, or (3) clear air turbulence
Weather code (RXX/XXXFT)
Runway visual range
Weather code (TS)
Thunderstorms
Weather code (SH)
Showers
Weather code (RA)
Rain
Weather code (SQ)
Squall
Weather code (SLP)
sea level pressure
Weather code (A)
Altimeter
Weather code (BCMG XXXX)
Gradual change between XX and XX zulu
Weather code (NSW)
No significant weather
Weather code (CB)
Cloudbase
Weather code (PROBXX)
Probability XX of occurrence
Weather code (Winds Aloft Over 100kts)
subtract 50 from direction, add 100 to velocity
Weather code (9900)
light/variable wind
Weather code for temperatures above 24,000
Always negative, so the sign is omitted