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120 Cards in this Set

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In the TAF for KMEM, what does “SHRA” stand for? (picture included)
Rain showers.
What wind is forecast for STL at 12,000 feet? (picture included)
230 true at 39 knots.
The marginal weather in central Kentucky is due to low (picture included)
ceiling
Below FL 180, en route weather advisories should be obtained from an FSS on
122.0 MHz.
The wind and temperature at 12,000 feet MSL as reported by a pilot are (picture included)
080 degrees at 21 knots and -7 degrees C.
What is a characteristic of stable air?
Stratiform clouds.
The Chicago FA forecast section is valid until the twenty-fifth at (picture included)
0800 Z.
Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high?
Smooth air, poor visibility, fog, haze, or low clouds.
If there is thunderstorm activity in the vicinity of an airport at which you plan to land, which hazardous atmospheric phenomenon might be expected on the landing approach?
Wind-shear turbulence.
If the temperature/dewpoint spread is small and decreasing, and the temperature is 62 degrees F, what type weather is most likely to develop?
Fog or low clouds.
The most frequent type of ground or surface-based temperature inversion is that which is produced by
terrestial radiation on clear, relatively still night.
Determine the wind and temperature aloft forecast for DEN at 9,000 feet. (picture included)
230 true at 21 knots, temperature -4 C.
In the TAF from KOKC, the “FM (FROM) Group” is forecast for the hours from 1600Z to 2200Zwith the wind from (picture included)
180 degrees at 10 knots.
What is the valid period for the TAF for KMEM? (picture included)
1800Z to 1800Z.
During the time period from 0600Z to 0800Z, what visibility is forecast for KOKC? (picture included)
Greater than 6 statute miles.
To determine the freezing level and areas of probable icing aloft, the pilot should refer to the
Inflight Aviation Weather Advisories
A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is known as a
squall line.
The boundary between two different air masses is referred to as a
front.
The wind direction and velocity at KJFK is from (picture included)
180 degrees true at 4 knots.
What weather phenomenon is causing IFR conditions in central Oklahoma? (picture included)
Low ceilings and visibility.
What types of fog depend upon wind in order to exist?
Advection fog and upslope fog.
What is the direction and speed of movement of the cell in area D? (picture included)
North at 17 knots.
Moist, stable air moving upslope can be expected to
produce stratus type clouds.
Determine the wind and temperature aloft forecast for MKC at 6,000 ft. (picture included)
200 true at 6 knots, temperature +3 C.
What is the status of the front that extends from Nebraska through the upper peninsula of Michigan? (picture included)
Cold.
What does the heavy dashed line that forms a large rectangular box on a Radar Summary Chart refer to?
Severe weather watch area.
What should pilots state initially when telephoning a weather briefing facility for preflight weather information?
The intended route of flight and destination.
The intensity of the turbulence reported at a specific altitude is (picture included)
light from 5,500 feet to 7,200 feet.
What is the approximate base of the cumulus clouds if the surface air temperature at 1,000 feet MSL is 70 degrees F and the dewpoint is 48 degrees F?
6,000 feet MSL.
AIRMETs are advisories of significant weather phenomena but of lower intensities than SIGMETs and are intended for dissemination to
all pilots.
Of what value is the Weather Depiction Chart to the pilot?
For determining general weather conditions on which to base flight
If an unstable air mass is forced upward, what type clouds can be expected?
Clouds with considerable vertical development and associated turbulence.
To best determine general forecast weather conditions over several states, the pilot should refer to
Aviation Area Forecasts
The top of the precipitation of the cell in area E is (picture included)
16,000 feet MSL.
Low-level turbulence can occur and icing can become hazardous in which type of fog?
Steam fog.
The conditions necessary for the formation of cumulonimbus clouds are lifting action and
unstable, moist air.
An almond or lens-shaped cloud which appears stationary, but which may contain winds of 50 knots or more, is referred to as
a lenticular cloud.
The wind at 5,000 feet AGL is southwesterly while the surface wind is southerly. This difference in direction is primarily due to
friction between the wind and the surface.
What type of weather is occurring in area B in the radar return? (picture included)
light to moderate rain.
What situation is most conducive to the formation of radiation fog?
Warm, moist air over low, flatland areas on clear, calm nights.
What conditions are necessary for the formation of thunderstorms?
High humidity, lifting force, and unstable conditions.
A temperature inversion would most likely result in which weather condition?
An increase in temperature as altitude is increased.
Transcribed Weather Broadcasts (TWEBs) may be monitored by tuning the appropriate radio receiver to certain
VOR and NDB frequencies.
Radar weather reports are of special interest to pilots because they indicate
location of precipitation along with type, intensity, and cell movement or precipitation.
What weather is forecast for the Florida area just ahead of the stationary front during the first 12 hours? (picture included)
Ceiling 1,000 to 3,000 feet and/or visibility 3 to 5 miles with continuous precipitation.
What wind is forecast for STL at 9,000 feet? (picture included)
230 true at 32 knots.
The IFR weather in northern Texas is due to (picture included)
low ceilings.
A weather briefing that is provided when the information requested is 6 or more hours in advance of the proposed departure time is
an outlook briefing.
In the TAF from KOCK, the clear sky becomes (picture included)
overcast at 2,000 feet during the forecast period between 2200Z and 2400Z.
What causes variations in altimeter settings between weather reporting points?
Unequal heating of the earth's surface.
Which weather phenomenon is always associated with a thunderstorm?
Lightning.
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
Precipitation beginning to fall.
What are the characteristics of unstable air?
Turbulence and good surface visibility.
One of the most easily recognized discontinuities across a front is
a change in temperature.
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
Freezing rain.
What information is contained in a CONVECTIVE SIGMET?
Tornadoes, embedded thunderstorms, and hail 3/4 inch or greater in diameter.
One in-flight condition necessary for structural icing to form is
visible moisture.
What information is provided by the Radar Summary Chart that is not shown on other weather charts?
Lines and cells of hazardous thunderstorms.
Possible mountain wave turbulence could be anticipated when winds of 40 knots or greater blow
across a mountain ridge, and the air is stable.
What are the current conditions depicted for Chicago Midway Airport (KMDW)? (picture included)
Sky 700 feet overcast, visibility 1-1/2 SM, rain.
What are the wind conditions at Wink, Texas (KINK)? (picture included)
110 degrees at 12 knots, gusts 18 knots.
In which situation is advection fog most likely to form?
An air mass moving inland from the coast in winter.
The development of thermals depends upon
solar heating.
To get a complete weather briefing for the planned flight, the pilot should request
a standard briefing
Convective circulation patterns associated with sea breezes are caused by
cool, dense air moving inland from over the water.
At approximately what altitude above the surface would the pilot expect the base of cumuliform clouds if the surface air temperature is 82 degrees F and the dewpoint is 38 degrees F?
10,000 feet AGL.
What are the processes by which moisture is added to unsaturated air?
Evaporation and sublimation.
Clouds, fog, or dew will always form when
water vapor condenses.
The presence of ice pellets at the surface is evidence that there
is a temperature inversion with freezing rain at a higher altitude.
A pilot can expect a wind-shear zone in a temperature inversion whenever the wind speed at 2,000 to 4,000 feet above the surface is at least
25 knots.
When requesting weather information for the following morning, a pilot should request
an outlook briefing.
What cloud types would indicate convective turbulence?
Towering cumulus clouds.
Individual forecasts for specific routes of flight can be obtained from which weather service?
Transcribed Weather Broadcasts (TWEBs).
According to the Weather Depiction Chart, the weather for a flight from southern Michigan to north Indiana is ceilings (picture included)
greater than 3,000 feet and visibility greater than 5 miles.
From which primary source should information be obtained regarding expected weather at the estimated time of arrival if your destination has no Terminal Forecast?
Area Forecast.
How are Significant Weather Prognostic Charts best used by a pilot?
For determining areas to avoid (freezing levels and turbulence).
What service should a pilot normally expect from an En Route Flight Advisory Service (EFAS) station?
Actual weather information and thunderstorm activity along the route.
What is the forecast wind for KMEM from 1600Z until the end of the forecast? (picture included)
Variable in direction at 6 knots.
At what altitude is the freezing level over the middle of Florida on the 12-hour Significant Weather Prognostic Chart? (picture included)
12,000 feet.
Crests of standing mountain waves may be marked by stationary, lens-shaped clouds known as
standing lenticular clouds.
One weather phenomenon which will always occur when flying across a front is a change in the
wind direction.
What clouds have the greatest turbulence?
Cumulonimbus.
When may hazardous wind shear be expected?
In areas of low-level temperature inversion, frontal zones, and clear air turbulence.
The enclosed shaded area associated with the low pressure system over northern Utah is forecast to have (picture included).
continuous snow.
What are the characteristics of a moist, unstable air mass?
Cumuliform clouds and showery precipitation.
What is the top for precipitation of the radar return in area B? (picture included)
24,000 feet MSL.
What is the outlook for the southern half of Indiana after 0700Z? (picture included)
VFR.
What is indicated when a current CONVECTIVE SIGMET forecasts thunderstorms?
Thunderstorms obscured by massive cloud layers.
Steady precipitation preceding a front is an indication of
Stratiform clouds with little or no turbulence.
What feature is associated with a temperature inversion?
A stable layer of air.
What sky condition and type obstructions to vision are forecast for upper Michigan in the Western portions from 0200Z until 0500Z? (picture included)
Ceiling becoming 1,000 feet overcast with visibility 3 to 5 statute miles in mist.
When telephoning a weather briefing facility for preflight weather information, pilots should state
the aircraft identification or the pilot's name.
SIGMETs are issued as a warning of weather conditions hazardous to which aircraft?
All aircraft.
What measurement can be used to determine the stability of the atmosphere?
Actual lapse rate.
A stable air mass is most likely to have which characteristic?
Poor surface visibility.
The suffix “nimbus,” used in naming clouds, means
a rain cloud.
What should pilots state initially when telephoning a weather briefing facility for preflight weather information?
Identify themselves as pilots.
To update a previous weather briefing, a pilot should request
an abbreviated briefing.
What feature is normally associated with the cumulus stage of a thunderstorm?
Continuous updraft.
To obtain a continuous transcribed weather briefing, including winds aloft and route forecasts for a cross-country flight, a pilot should monitor a
Transcribed Weather Broadcast (TWEB) on an NDB or a VOR facility.
During the life cycle of a thunderstorm, which stage is characterized predominantly by downdrafts?
Dissipating.
Which type of weather briefing should a pilot request to supplement mass disseminated data?
An abbreviated briefing.
Thunderstorms reach their greatest intensity during the
mature stage.
What would decrease the stability of an air mass?
Warming from below.
When telephoning a weather briefing facility for preflight weather information, pilots should state
whether they intended to fly VFR only.
Which in-flight advisory would contain information on severe icing not associated with thunderstorms?
SIGMET.
If the terrain elevation is 1,295 feet MSL, what is the height above ground level of the base of the ceiling? (picture included)
505 feet AGL.
The base and tops of the overcast layer reported by a pilot are (picture included)
7,200 feet MSL and 8,900 feet MSL.
How should contact be established with an En Route Flight Advisory Service (EFAS) station, and what service would be expected?
Call Flight Watch on 122.0 for information regarding actual weather and thunderstorm activity along proposed route.
Clouds are divided into four families according to their
height range.
What wind is forecast for ALS at 9,000 feet? (picture included)
240 true at 20 knots.
Interpret the weather symbol depicted in Utah on the 12-hour Significant Weather Prognostic Chart. (picture included)
Moderate turbulence, surface to 18,000 feet.
The intensity and type of icing reported by a pilot is (picture included)
light to moderate rime.
Which type weather briefing should a pilot request, when departing within the hour, if no preliminary weather information has been received?
Standard briefing.
What values are used for Winds Aloft Forecasts?
True direction and knots.
Thunderstorms which generally produce the most intense hazard to aircraft are
squall line thunderstorms.
The section of the Area Forecast entitled “VFR CLDS/WD” contains a general description of
clouds and weather which cover an area greater than 3,000 square miles and is significant to VFR flight operations.
Every physical process of weather is accompanied by, or is a result of, a
heat exchange.
What sky condition and visibility are forecast for upper Michigan in the eastern portions after 2300Z? (picture included)
Ceiling 1,000 feet overcast and 3 to 5 statute miles visibility.
Between 1000Z and 1200Z the visibility at KMEM is forecast to be? (picture included)
3 statute miles.