WEATHER THEORY Flashcards
THIN VAIL OF ATMOSPHERE EXTENDING FROM THE SURFACE TO 7 MILES OUT
TROPOSPHERE
TROPOSPHERE
WEATHER OCCURS HERE
AIR PRESSURE DECREASES
WITH ALTITUDE
AIR PRESSURE DECREASES
WITH ALTITUDE
LESS DENSE AIR EQUALS
DECREASED PERFORMANCE
DEWPOINT
THE TEMP TO WHICH AIR MUST BE COOL TO BECOME SATURATED
WHICH STAGE OF THUNDERSTORM IS CHARACTERIZED BY DOWNDRAFT?
DISSIPATING
WHAT MAY CREATE DOWNDRAFTS THAT AFFECT UAS PERFORMANCE?
WATER AND VEGITATION, BECAUSE THEY ABSORB WARM AIR AND CREATE COOL AREAS
THUNDERSTORMS REACH THEIR GREATEST INTENSITY DURING THE
MATURE STAGE
WHAT CLOUDS INDICATE CONVECTIVE TURBULANCE
TOWERING CUMULUS CLOUDS, THEY ARE UNSTABLE RISING AIR. UPWARD MOTION (CONVECTION) IS ACCOMPANIED BY SIGNIFICANT TURBULANCE
WHAT CLOUDS INDICATE CONVECTIVE TURBULANCE
TOWERING CUMULUS CLOUDS, THEY ARE UNSTABLE RISING AIR. UPWARD MOTION (CONVECTION) IS ACCOMPANIED BY SIGNIFICANT TURBULANCE
SQUALL LINE
NONFRONTAL NARROW BAND OF ACTIVE THUNDERSTOMRS THAT OFTEN DEVELOP AHEAD OF A COLD FRONT
SQUALL LINE
NONFRONTAL NARROW BAND OF ACTIVE THUNDERSTOMRS THAT OFTEN DEVELOP AHEAD OF A COLD FRONT
ONE WEATHER PHENOMENON WHICH WILL ALWAYS OCCUR WHEN A FRONT PASSES IS A CHANGE IN THE
WIND DIRECTION
ONE OF THE MOST EASILY RECOGNIZED DISCONTINUITIES ACROSS A FRONT IS
CHANGE OF TEMP
CONVECTIVE CIRCULATION PATTERNS ASSOCIATED WITH SEA BREAZES ARE CAUSED BY
COOL DENSE AIR MOVING INLAND FROM OVER THE WATER
CONVECTIVE CIRCULATION PATTERNS ASSOCIATED WITH SEA BREAZES ARE CAUSED BY
COOL DENSE AIR MOVING INLAND FROM OVER THE WATER
WHAT FEATURE IS NORMALLY ASSCOCIATED WITH THE CUMULUS STAGE OF A THUNDERSTORM
CONTINOUS UPDRAFT
WHAT FEATURE IS NORMALLY ASSCOCIATED WITH THE CUMULUS STAGE OF A THUNDERSTORM
CONTINOUS UPDRAFT
DEVELOPMENT OF THERMALS DEPENDS UPON
SOLAR HEATING
DEW, FOG, CLOUDS FORM WHEN
WATER VAPOR CONDENSES, AKA WHEN TEMP AND DEW POINT CONVERGE
DEW, FOG, CLOUDS FORM WHEN
WATER VAPOR CONDENSES, AKA WHEN TEMP AND DEW POINT CONVERGE
WHAT ARE THE PROCESSES BY WHICH MOISTURE IS ADDED TO UNSATURATED AIR
EVAPORATION AND SUBLIMATION
CUMULONIMBUS FORMATION
LIFTING ACTION, AND UNSTABLE MOIST AIR
CUMULONIMBUS FORMATION
LIFTING ACTION, AND UNSTABLE MOIST AIR
EVERY PHYSICAL PROCSS OF WEATHER IS ACCOMPANIED BY
HEAT EXCHANGE
BOUNDARY BETWEEN 2 DIF AIR MASSES IS REFFERED TO A
FRONT
BOUNDARY BETWEEN 2 DIF AIR MASSES IS REFFERED TO A
FRONT
FROST OCCURS WHEN THE SURFACE IS AT OR BELOW THE DEWPOINT OF THE ADJACENT AIR
AND THE DEWPOINT IS BELOW FREEZING
LENTICULAR CLOUDS CAUSE
HIGH WINDS AND TURBULANCE
INFLIGHT ICING REQUIRES
VISIBLE MOISTURE
INFLIGHT ICING REQUIRES
VISIBLE MOISTURE
THE AMOUNT OF WATER VAPOR WHICH AIR CAN HOLD IS DEPENDENT ON
AIR TEMP
NIMBUS
RAIN CLOUD
DENSITY ALTITUDE
MEASURE OF ATMOSPHERIC DENSITY IN TERMS OF ALTITUDE UNDER STANDARD CONDITIONS
DENSITY ALTITUDE
MEASURE OF ATMOSPHERIC DENSITY IN TERMS OF ALTITUDE UNDER STANDARD CONDITIONS
STANDARD ATMOSPHERIC CONDITIONS AT SEA LEVEL
59 F AND 29.92”Hg mercury (pressure)
true altitude
is msl
absolute altitude is
agl
standard datum plane
where the standard pressure line is
pressure altitude
height above the standard datum plane
when conditions are standard
pressure altitude and density altitude are equal
density altitude
pressure altitude corrected for nonstandard temp
barometric pressure descreases by approx 1’Hg per 1000 ft
high density altitude describes low density air
high density altitude describes low density air
high density altitude describes
low density air, which you should expect reduced performance and shorter battery life
