Private Pilot Jeppesen Chapter 7
A. True/False. A persistence forecast assumes that weather systems will continue to
move in the same direction and speed, unless some unexpected force intervenes. -
answerfalse
A. Is the trend forecast more accurate for long or short periods of time? - answerShort
periods of time
A. How does numerical weather prediction develop a forecast? - answer numerical
weather prediction uses mathematical equations which relate atmospheric conditions
with other variables. The system of equations represents the physical laws that govern
the behavior of the atmosphere. The computer applies the model to the current
atmospheric conditions to forecast minutes in the future. The process i repeated many
times to create a prediction for the next day or two.
A. Normally, how often do airports record a weather observation? - answerevery hour
A. what type of weather events an be accurately predicted four days in advance? -
answerLarge storms and major heat waves
B. what is the difference between prevailing visibility and runway visual range? -
answerPrevailing visibility is the greatest distance an observer can see and identify
objects through at least half of the horizon. RBR is based on what a pilot in a moving
aircraft should see when looking down the runway.
B. In a METAR, what is meant by a + sign immediately preceding a precipitation code? -
answerHeavy intensity
B. If a METAR reported a sky condition of BKN008, what altitude were the bases of the
clouds at the time of the observation? How much of the sky was covered? - answerat
the time of the observation, clouds with based at 800 feet AGL covered 5/8 to 7/8 of the
sky.
B. Decode the following Metar
METAR KHOU 221853Z 17009KT 2SM -TSRA SCT004 BKN009 OVC015 21/20 A3004
RMK TSB12 SLP170 T0206196 - answerRoutine observation... William P. Hobby
airport... on the 22nd day of the month at 1835Z... wind 170 degree at 9 knots...
prevailing visibility 2 statute miles... thunderstorm with light rain... scattered clouds at
400 feet AGL... broken clouds at feet AGL... overcast skies at 1,500 feet AGL...
temperature 21 degree C, dewpoint 20 degree C... altimeter 30.04 in. Hg... remarks...
thunderstorm began 12 minutes past the hour... sea level pressure 1017.0 mb...
temperature 20.6 degree C dewpoint 19.6 degree C.
A. True/False. A persistence forecast assumes that weather systems will continue to
move in the same direction and speed, unless some unexpected force intervenes. -
answerfalse
A. Is the trend forecast more accurate for long or short periods of time? - answerShort
periods of time
A. How does numerical weather prediction develop a forecast? - answer numerical
weather prediction uses mathematical equations which relate atmospheric conditions
with other variables. The system of equations represents the physical laws that govern
the behavior of the atmosphere. The computer applies the model to the current
atmospheric conditions to forecast minutes in the future. The process i repeated many
times to create a prediction for the next day or two.
A. Normally, how often do airports record a weather observation? - answerevery hour
A. what type of weather events an be accurately predicted four days in advance? -
answerLarge storms and major heat waves
B. what is the difference between prevailing visibility and runway visual range? -
answerPrevailing visibility is the greatest distance an observer can see and identify
objects through at least half of the horizon. RBR is based on what a pilot in a moving
aircraft should see when looking down the runway.
B. In a METAR, what is meant by a + sign immediately preceding a precipitation code? -
answerHeavy intensity
B. If a METAR reported a sky condition of BKN008, what altitude were the bases of the
clouds at the time of the observation? How much of the sky was covered? - answerat
the time of the observation, clouds with based at 800 feet AGL covered 5/8 to 7/8 of the
sky.
B. Decode the following Metar
METAR KHOU 221853Z 17009KT 2SM -TSRA SCT004 BKN009 OVC015 21/20 A3004
RMK TSB12 SLP170 T0206196 - answerRoutine observation... William P. Hobby
airport... on the 22nd day of the month at 1835Z... wind 170 degree at 9 knots...
prevailing visibility 2 statute miles... thunderstorm with light rain... scattered clouds at
400 feet AGL... broken clouds at feet AGL... overcast skies at 1,500 feet AGL...
temperature 21 degree C, dewpoint 20 degree C... altimeter 30.04 in. Hg... remarks...
thunderstorm began 12 minutes past the hour... sea level pressure 1017.0 mb...
temperature 20.6 degree C dewpoint 19.6 degree C.
