1Which is a direct cause of atmospheric circulation
Heat Exchange.
2What is the standard temperature at 10,000'
-5 C.
3What is the standard temperature at 20,000'
-25 C.
4Which conditions are favorable for the formation of a surface-based temperature inversion
Clear, cool nights with calm or light wind.
5Standard Temperature at sea level is
15 C.
6Given: Pressure altitude: 12,000', True air Temperature: +50 F, from the conditions given, the approximate density altitude is
14,130 feet.
7Given: Pressure altitude: 5,000', True air temperature: +30 C, from the conditions given, the approximate density altitude is
8,000 feet.
8Given: Pressure altitude: 6,000', True air temperature: +30' F, from the conditions given, the approximate density altitude is
5,500 feet.
9Given: Pressure altitude: 7,000', True air temperature: +15 C, from the conditions given, the approximate density altitude is
8,680 feet.
10What causes wind
Pressure differences.
11In the northern hemisphere, the wind is deflected to the
Right by Coriolis force.
12Why does the wind have a tendency to flow parallel to the isobars above the friction level
Coriolis force tends to counterbalance the horizontal pressure gradient.
13The wind system associated with a low-pressure area in the northern hemisphere is
A cyclone and is caused by Coriolis force.
14With regard to windflow patterns shown on surface analysis charts, when the isobars are
Close together, the pressure gradient force is greater and wind velocities are stronger.
15What prevents air from flowing directly from high-pressure areas to low-pressure areas
Coriolis force.
16While flying cross-country in the northern hemisphere, you experience a continuous left crosswind which is associated with a major wind system - this indicates that you
Are flying towards an area of generally unfavorable weather conditions.
17Which is true with respect to a high- or low-pressure system
A high-pressure area or ridge is an area of descending air.
18Which is true regarding high or low-pressure systems
A low-pressure area or through is an area of rising air.
19When flying into a low-pressure area in the northern hemisphere, the wind direction and velocity will be from the
Left and decreasing.
20Which is true regarding actual air temperature and dewpoint temperature spread - The temperature spread
Decreases as the relative humidity increases.
21The general circulation of air associated with a high-pressure area in the northern hemisphere is
Outward, downward, and clockwise.
22Virga is best described as
Streamers of precipitation trailing beneath clouds evaporates before reaching the ground.
23Moisture is added to air by
Evaporation and sublimation.
24Ice pellets encountered during flight normally are evidence that
A warm front is about to pass.
25What is indicated if ice pellets are encountered at 8,000'
Freezing rain at higher altitude.
26Ice pellets encountered during flight are normally evidence that
Freezing rain exists at higher altitudes.
27When conditionally unstable air with high-moisture content and very warm surface temperature is forecast, one can expect what type of weather
Strong updrafts and cumulonimbus clouds.
28What is the approximate base of the cumulus clouds if the temperature at 2,000' MSL is 10 C and the dewpoint is 1 C
6,000' MSL.
29If clouds form as a result of very stable, moist air being forced to ascend a mountain slope, the clouds will be
Stratus type with little vertical development and little or no turbulence.
30What determines the structure or type of clouds which will form as a result of air being forced to ascend
The stability of the air before lifting occurs.
31Refer tot he excerpt from the following METAR report: KTUS 08004KT 4SM HZ 26/04 A2995 RMK RAE36, at approximately what altitude AGL should bases of convective-tupe comuliform clouds be expected
8,800 feet.
32What are the characteristics of stable air
Poor visibility; steady precipitation; stratus clouds.
33Which would decrease the stability of an air mass
Moist, warm air.
34From which measurement of the atmosphere can stability be determined
The ambient lapse rate.
35What type weather can one expect from moist, unstable, and very warm surface temperatures
Strong updrafts and cumulonimbus clouds.
36Which would increase the stability of an air mass
Cooling from below.
37The conditions necessary for the formation of stratiform clouds are a lifting action and
Stable, moist air.
38Which cloud types would indicate convective turbulence
Towering cumulus clouds.
39The presence of standing lenticular altocumulus clouds is a good indication of
Very strong turbulence.
40The formation of either predominantly stratiform or predominantly cumuliform clouds is dependent upon the
Stability of the air being lifted.
41Which combination of weather-producing variables would likely result in cumuliform-type clouds, good visibility, and showery rain
Unstable, moist air and orographic lifting.
42What is a characteristic of stable air
Stratiform clouds.
43A moist, unstable air mass is characterized by
Cumuliform clouds and showery precipitation.
44When an air mass is stable, which of these conditions are most likely to exist
Smoke, dust, haze, etc, concentrated at the lower levels with resulting poor visibility.
45Which is a characteristic of stable air
Restricted visibility.
46Which us a characteristic typical of a stable air mass
Continuous precipitation.
47Which is true regarding a cold front occlusion - The air ahead of the warm front
Is warmer than the air behind the overtaking cold front.
48Which are characteristics of a cold mass moving over a warm surface
Cumuliform clouds, turbulence, and good visibility.
49The conditions necessary for the formation of cumulonimbus clouds are a lifting action and
Unstable, moist air.
50Fog produced by frontal activity is a result of saturation due to
Evaporation of precipitation.
51What is an important characteristic of wind shear
It can be present at any level and can exist in both a horizontal and vertical direction.
52Hazardous wind shear is commonly encountered
In areas of temperature inversion and near thunderstorms.
53Low-level wind shear may occur when
There is a low-level temperature inversion with strong winds above the inversion.
54If a temperature inversion is encountered immediately after takeoff or during an approach to a landing, a potential hazard exists due to
Wind shear.
55Given: Winds at 3,000' AGL - 30kts, Surface winds - calm, while on landing, under clear skies with convective turbulence a few hours after sunrise, one should
Increase approach airspeed slightly above normal to avoid stalling.
56Convective currents are most active on warm sumer afternoons when winds are
Light.
57When flying low over hilly terrain, ridges, or mountain ranges, the greatest potential danger from turbulent air currents will usually be encountered on the
Downwind side when flying into the wind.
58During an approach, the most important and most easily recognized means of being alerted to possible wind shear is monitoring the
Power and vertical velocity required to remain on the proper glidepath.
59During departure, under conditions of suspected low-level wind shear, a sudden decrease in headwind will cause
A loss in airspeed equal to the decrease in wind velocity.
60Which situation would most likely result in freezing precipitation - rain falling from air which has a temperature of
More than 0 C into air having a temperature of 0 C or less.
61Which statement is true concerning the hazards of hail
Hailstones may be encountered in clear air several miles from a thunderstorm.
62Hail is most likely to be associated with
Cumulonimbus clouds.
63The most severe weather conditions, such as destructive winds, heavy hail, and tornadoes, are generally associated with
Squall lines.
64Of the following, which is accurate regarding turbulance associated with thunderstorms
Outside the cloud, shear turbulence can be encountered 20 miles laterally from a severe storm.
65If airborne radar is indicating an extremely intense thunderstorm echo, this thunderstorm should be avoided by a distance of at least
20 miles.
66Which statement is true regarding squall lines
They are nonfrontal and often contain severe, steady-state thunderstorms.
67Which statement is true concerning squall lines
They offer the most intense weather hazards to aircraft.
68Select the true statment pertaining to the life cycle of a thunderstorm
The beginning of rain at the earth's surface indicates the mature stage of the thunderstorm.
69What visible signs indicate extreme turbulence in thunderstorms
Cumulonimbus clouds, very frequent lightning, and roll clouds.
70Which weather phenomenon signals the beginning of the mature stage of a thunderstorm
The start of rain.
71What feature is normally associated with the cumulus stage of a thunderstorm
Continuous updraft.
72During the life cycle of a thunderstorm, which stage is characterized predominantly by downdrafts
Dissipating.
73What minimum distance should exist between intense radar echoes before any attempt is made to fly between these thunderstorms
40 miles.
74Which in-flight hazard is most commonly associated with warm fronts
Precipitation-induced fog.
75Which is true regarding the use of airborne weather-avoidance radar for the recognition of certain weather conditions
The radarscope provides no assurance of avoiding instrument weather conditions.
76A situation most conducive to the formation of advection fog is
An air mass moving inland from the coastline during the winter.
77Advection fog has drifted over a coastal airport during the day - What may tend to dissipate or lift this frog into low stratus clouds
Wind 15 kts or strangers.
78What lift advection fog into low stratus clouds
Surface winds of approximately 15 kts or stronger.
79In what ways do advection fog, radiation fog, and steam fog differ in their formation and location
Radiation fog is restricted to land areas; advection fog is most common song coastal areas; steam fog forms over a water surface.
80With respect to advection fog, which statement is true
It can appear suddenly during day or night, and it is more persistent than radiation fog.
81Which feature is associated with the tropopause
Abrupt change in temperature lapse rate.
82A common location of clear air turbulence is
In an upper trough on the polar side of a jet stream.
83The jet stream and associated clear air turbulence can sometimes be visually identified in flight by
Long streaks of cirrus clouds.
84During the winter months in the middle latitudes, the jet streams shift toward the
South and speed increases.
85The strength and location of the jet stream is normally
Weaker and farther north in the summer.
86During prefligh preparation, weather report forecasts which are not routinely available at the local service outlet (AFSS) can best be obtained by means of contacting
Weather forecast office (WFO).
87The most current en route and destination weather information for an instrument flight should be obtained from the
AFSS.
88The telephone information briefing service (TIBS) provided by AFSSs include
Continuous recording of meteorological and/or aeronautical information available by telephone.
89The remarks section of an aviation routing weather report (METAR) contains the following coded information - what does it meand: KORD 21135Z 01006KTS 10SM OV0260 M03/M08 A3030 RMK FZDZB42 WSHIFT 30 FROPA
Freezing drizzle began at 42 after the hour and wind shift occurred at 30 after the hour due to a frontal passage.
90What is meant by the special METAR weather observation for KBOI - SPECI KBOI 091854Z 32005KT 1 ½SM RA BR OV007 17/16 A2990 RMK RAB12
Rain and mist obstructing visibility; rain began at 1812Z.
91The station originating the following METAR observation has a field elevation of 3,500 feet MSL - If the sky cover is one continuous layer, what is the thickness of the cloud layer - Top of the overcast reported at 8,000 feet MSL - METAR KHOB 151250Z 17006KT 4SM OVC005 13/11 A2998
4,000 feet.
92What wind conditions would you anticipate when squall lines are reported at your destination
Sudden increases in windspeed of at least 16 knots to a sustained speed of 22 knots or more for at least 1 minute.
93What significant cloud coverage is reported by this pilot report - KMOB UA/OV 15NW MOB 1340Z/SK OVC 025/045 OVC 090
The top of the lower overcast is 2,500 feet; base and top of second overcast layer is 4,500 and 9,000 feet, respectively.
94To best determine observed weather conditions between weather reporting stations, the pilot should refer to
Pilot reports.
95What is the meaning of the terms PROB40 2102 +TSra as used in a Terminal Aerodrome Forecasts (TAF)
Between 2100Z and 0200Z there is a forty percent (40%) probability of thunderstorms with heavy rain.
96What does the contraction VRB in the Terminal Aerodrome Forecast (TAF) mean
Wind direction is variable.
97Which statement pertaining to the following Terminal Aerodrome Forecast (TAF) is true - TAF KMEM 091135Z 0915 15005KT 5SM HZ BKN060 FM1600 VRB04KT P6SM SKC
SKC in the valid period indicates no significant weather and sky clear.
98The visibility in a Terminal Aerodrome Forecast (TAF) of P6SM implies that the prevailing visibility is expected to be greater than
6 Statute Miles.
99Terminal Aerodrome Forecasts (TAFs) are issued how many times a day and cover what period of time
Four times daily and are usually valid for a 24 hour period.
100Which information section is contained in the Aviation Area Forecast (FA)
VFR Clouds and weather (VFR CLDS/WX).
101The section of the Aviaiton Area Forecast (FA) entitled VFR clouds and Weather contains a summary of
Sky conditions, cloud heights, visibility, obstructions to vision, precipitation, and sustained surface winds of 20 knots or greater.
102In-flight Aviation Weather Advisories include what type of information
Forecasts for potentially hazardous flying conditions for enroute aircraft.
103What type of inflight weather advisories provides an en route pilot with information regarding the possibility of moderate icing, moderate turbulence, winds of 30 knots or more at the surface and extensive mountain obscuremen
AIRMETs and Center Weather Advisories (CWA).
104What single reference contains information regarding expected volcanic eruption, that is occurring or is expected to occur
In-Flight Weather Advisories.
105The Aviation Weather Center (AWC) prepares FA's for the contiguous US
Three times each day.
106Which forecast provides specific information concerning expected sky cover, cloud tops, visibility, weather, and obstructions to vision in a route format
Area Forecast.
107SIGMET's are issued as a warning of weather conditions which are hazardous
to all aircraft.
108Which correctly describes the purpose of Convective SIGMET's (WST)
The consist of either an observation and a forecast or just a forecast for tornadoes, significant thunderstorm activity, or hail greater than or equal to ¾ inch in diameter.
109What values are used for Winds Aloft Forecasts
True direction and knots.
110On a Surface Analysis Chart, the solid lines that depict sea level pressure patterns are called
Isobars.
111Dashed lines on a surface analysis chart, if depicted, indicate that the pressure gradient is
Weak.
112Which chart provides a ready means of locating observed frontal positiosn and pressure centers
Surface Analysis Chart.
113On a surface analysis chart close spacing of the isobars indicates
Strong pressure gradient.
114The surface analysis chart depicts
Actual frontal positions, pressure patterns, temperature, dewpoint, wind, weather, and obstructions to vision at the valid time of the chart.
115Which provides a graphic display of both VFR and IFR weather
Weather depiction chart.
116When total sky cover is few or scattered, the height shown on the Weather Depiction Chart is the
Base of the lowest layer.
117Which weather chart depicts conditions forecast to exist at a specific time in the future
12 Hour Significant Weather Prognostication Chart.
118What weather phenomenon is implied within an area enclosed by red scalloped lines on a US High-Level Significant Weather Prognostic Chart
Moderate or severe icing.
119The US High-Level Significant Weather Prognostic Chart forecasts significant weather for what airspace
25,000 feet to 63,000 feet.
120What is the upper limit of the Low Level Prognostic Chart
24,000 feet.
121The difference found by subtracting the temperature of a parcel of air theoretically lifted from the surface to 500 millibars and the existing temperature at 500 millibars is called the
Lifted Index.
122Hatching on a constant pressure analysis chart indicates
Windspeed 70 knots to 110 knots.
123What flight planning information can a pilot derive from constant pressure analysis charts
Winds and temperatures aloft.
124From which of the following can the observed temperature, wind, and temperature/dewpoint spread be determined at a specified altitude
Constant Pressure Analysis Charts.
125The minimum vertical wind shear value critical for probable moderate or greater turbulence is
6 knots per 1,000 feet.
126A pilot reporting turbulence that momentarily causes slight, erratic changes in altitude and/or attitude should report is as
Light Turbulence.
127When turbulence causes changes in altitude and/or attitude, but aircraft control remains positive, that should be reported as
Moderate.
128Turbulence that is encountered above 15,000 feet AGL not associated with cumuliform cloudiness, including thunderstorms, should be reported as
Clear Air turbulence.
129Which type of jetstream can be expected to cause the greater turbulence
A curving jetstream associated with a deep low-pressure trough.
130A strong wind shear can be expected
On the low-pressure side of a jetstream core where the speed at the core is stronger than 110 knots.
131The low level wind shear alert system (LLWAS) provides wind data and software process to detect the presence of a
Change in wind direction and/or speed within a very short distance above the airport.
132One of the most dangerous features of mountain waves is the turbulent areas in and
Below rotor clouds.
133Weather Advisory Broadcasts, including severe forecast alerts (AWW), convective SIGMETs, and SIGMETs, are provided by
Air Route Traffic Control Center (ARTCC).
134Frost covering the upper surface of an airplane wing usually will cause
The airplane to stall at an angle of attack that is lower than normal.
135To determine the pressure altitude prior to takeoff, the altimeter should be set to
29.92" and the altimeter indication noted.
136If you find yourself in convective weather with severe turbulence, you should
Slow below maneuvering speed (Va) or manufacturer's recommended turbulence airspeed, maintain wings level, and accept airspeed and altitude deviations.
137The most dangerous hazards operating in the vicinity of thunderstorms are
Hail and turbulence.
138Frost is a hazard to aircraft because
It disrupts airflow over the wing.
139The national convective weather forecast is a supplement to, but does not substitute for, the report and forecast information contained in
Convective SIGMETs.
140You are obtaining a weather briefing for a cross-country flight - The briefer has given you a convective outlook for your route of flight -What are the three levels of convective activity in the convective outlook
Slight, Moderate, and High.
141You are planning a cross-country flight across the US - the Flight will be divided into several segments - For flight planning, time enroute, fuel requirements and air circulation are essential - In which direction does the air circulate around a low in the northern hemisphere
In the northern hemisphere, the air in an area around a low is deflected to the right and circulates counterclockwise.
142What are the stages in the life cycle of a thunderstorm
Cumulus stage, mature stage, and dissipating stage.
143Which is true concerning the radar weather report (SD) for KOKC - KOKC 1934 LN 8TRW++/+ 86/40 164/60 199/115 15W C2425 MT 570 AT 159/65 2 INCH HAIL RPRTD THIS CELL
The maximum tops of the cells is 57,000 feet located 65NM southeast of the station.
144How long is the forecast of a convective SIGMET valid for
2 Hours.
145What was the location of the aircraft when the pilot submitted the following PIREP - UA/OV SUX 18025/TM1340/TP PA34/SL OVC 025/WX FV04SM RA HZ/WV 23015KT/TB LGT/RM LGT RAIN
25NM south on the 180 degree radial from the SUX VOR.
146What weather phenomenon is implied within an area enclosed by bold yellow dashed lines in the US High-Level Significant Weather Prognostic Chart
Moderate or Severe Turbulence.
147What is the flight visibility submitted in the following PIREP - UA/OV SUX 18025/TM1340/TP PA34/SK OVC 025/WX FV04SM RA HZ/WV 23015KT/TB LGT/RM LGT RAIN
4 statue miles, rain, haze.
148You are planning a trip for the following day - Which weather chart would be the most appropriate for determining frontal locations along your intended route at the time of your flight
Significant Weather Prognostic Chart.
149What weather phenomenon is depicted by bold green arrows on a US Mid-level significant Weather Prognostic Chart
Jet Stream Axis.
150You are PIC of a flight that is supposed to depart in an hour - Thunderstorms are forecasted along your route - What are some of the alternatives you have
Before departing, have alternate plans in place to deviate for weather.
151The following METAR observation has a field elevation of 1,500 feet MSL - If the sky cover is one continuous layer - (Top of overcast reported at 8,000 feet MSL) - METAR KBOS 101200Z 10003KT 5SM OVC045 20/23 A2993
2,000 feet.
152What weather conditions are indicated by the TAF shown below - 15005KT 5SM HZ FEW020 WS010/31022KT
Wind shear is reported at 1,000 feet AGL from 310 at 22 knots.
153While planning a flight, your weather briefing indicates low pressure is developing along your planned route - What weather conditions do you expect
Increasing clouds and precipitation.
154On a flight from east to west in the northern hemisphere, where a high pressure system exists north of your route, the most favorable winds would exist
To the south of the high pressure system.
155The national convective weather forecast provides forecasts for
The United States only.
156As you approach an airport to land, you observe convective clouds over the airport with virga below - this could indicate
The presence of a microburst.
157What are some weather indications of the imminent passage of a cold front
High dew point, falling barometric pressure.
158If ice pellets are falling while you are performing your preflight inspection, what does this indicate
An inversion is taking place.
159Where is the strongest turbulence in the jet stream found
On the polar side of the axis due to the greatest decrease in wind speed.
160For smooth air operations on a warm, sunny day, and scattered cumulus clouds are above your altitude, you should
Climb to a higher altitude that is above the cumulus clouds.
161What is the sky condition submitted in the following PIREP - UA/OV SUX 18025/ TM1340/TP PA34/SK OVC025 TOP45 BKN073 TOP085 SKC/TB LGT
Base of overcast 2,500 MSL with tops at 4,500 MSL, broken 7,300 MSL with tops at 8,500 MSL, sky clear above 8,500 MSL.
162What weather phenomena can be expected before the passage of an occluded front
Precipitation and poor visibility.
163Where are you most likely to encounter clear air turbulence (CAT)
Between 20,000 feet and 50,000 feet in a cloud-free area.
164When flying over a mountain range with turbulence, mountain waves cause downdrafts on the
Crest and downwind of the mountain range for hundreds of miles.
165Large changes in attitude and altitude, changes in airspeed, and momentary loss of control is reported as
Severe turbulence.
166When and where is the jet stream the strongest
Northern and Southern Hemispheres winter.
167Which kind of wind shear is most hazardous
Convective wind shear.
168What is the valid period for the following TAF - KSUX 111130Z 1112/1212 23012G20KT P6SM OVC080
1200Z on the 11th day of the month to 1200Z on the 12th day of the month.
169While enroute at 17,500 feet MSL, how should you report turbulence with the following characteristics - Proximity to cumuliform clouds: none - Aircraft reaction: changes in altitude occur but aircraft remains in positive control - Reaction inside the aircraft: occupants feel definite strain against seatbelts
Moderate CAT.
170A supercell thunderstorm is near your destination airport - you should be aware that these storms
May remain for several hours.
171What weather conditions can be expected with a warm front int the summer months
Cumulous build-ups and thunderstorms.
172The standard temperature lapse rate below the tropopause
Remains the same at all altitudes.
173You are flying and notice virga above your airport of intended landing and dust billowing up from the ground
You should fly away from the airport as this is an indication of a microburst.
174When are thunderstorms forecast - KOKC 181133Z 1812/19212 17012G18KT P6SM OVC015 TEMPO 1812/1815 BKN200 FM181500 18014G22KT P6SM BKN025 FM181800 18014G22KT P6SM SCT040 PROB30 1823/1903 P6SM TSRA BKN040CB FM190800 17012G18KT P6SM OVC015
Between 2300 and 0300Z.
175The weather forecast for the next morning at a coastal airport includes temperature 16 C, dewpoint 16 C and wind 180 at 10 knots - What weather is expected
Foggy, with fog intensifying until wind increases above 15 knots.
176What weather phenomenon often spawns tornadoes
Squall lines.
177Which weather product contains non-convective weather information potentially hazardous to all aircraft
SIGMETs.
178If the temperature lapse rate increases, what happens to the stability of the air
Stability decreases.
179Jet streams are bands of strong wind
In the upper levels of the atmosphere.
180Which is a danger of a gust front associated with a thunderstorm
Low level wind shear.
181What conditions are indicated by this SIGMET - SIGMET ROMEO 2 VALID UNTIL 100530 OR WA FROM SEA TO PDT TO EUG TO SEA OCNL SEV CAT BTN FL280 AND FL350 EXPCD DUE TO JTSTR CONDS BEGNG AFT 0200Z CONTG BYD 0530Z
Occasional severe clear air turbulence between FL 280 and FL 350.
182When precipitation falls through air that is more than 0 C into air that is less than 0 C, what weather conditions can you expect
Freezing precipitation.
183A temperature inversion is a layer which
Temperature increases with altitude.
184On your route you see cumulous buildups with heavy rain shafts close to your destination airport - You should
Consider diverting.
185What are the winds forecast at 6,000 feet MSL - MKC — 3000: 9900 - 6000: 2425+07 - 9000: 2435+05
240 true at 25 knots.
186There is a squall line along the route on your cross-country flight - what do you expect
Turbulence and heavy rain.
187If the temperature lapse rate decreases, what happens to the stability of the air
Stability increases.
188While on a flight, you encounter stratiform clouds and light drizzle - you can probably expect
Stable air.
189What weather conditions are indicated by the terminal aerodrome forecast (TAF) shown below - FM01200 18015KT P6sm SCT050 PROB30 0121/0211 1SM +TSRA
30% chance of thunderstorms, heavy rain, and 1 statute mile visibility.
190When flying in a moutnainous area on a cool, clear night with little wind and moist air, what would you expect
Fog forming in low-lying or valley areas.
191Advection fog in coastal areas is most commonly caused by
Warm, moist air passing over a cool surface.
192When flying over a mountain range, when would you encounter the strongest turbulent downdraft
Downwind of the mountain range.
193Why should a pilot not attemp to fly an aircraft when frost has accumulated on the aircraft airfoils
The boundary layer of smooth air over the lifting airfoil will separate at an AOA that is below the critical angle of attack.
194In the northern hemisphree, how does air move from an area of high pressure to an area of low pressure
It moves clockwise, outward, and downward manner into a area of rising low presure.
195If a surface-based temperature inversion is being reported at your departure airport, you can expect
Low level wind shear.
196You area approaching a mountainous area at 10,000 feet from the eat, with winds at 50 knots from the west - you see flat, lens-shaped clouds ahead - This is an indication of
Strong turbulence.
197What conditions cause a stable air mass
Lower humidity and cooler temperatures.
198What conditions can be expected at this coastal town - METAR KTIX 110953Z 10004KT ¼SM OVC015 17/17 A2973 RMK A02 TAF KTIX 111030Z 1112/1212 11010G15KT 1/2SM BKN010 FM 112000 11010G15 1/4SM SCT015
Low visibility and fog increases with winds no greater than 15 knots.
199What conditions are specified by the following special weather report (SPECI) — SPECI KFSD 092054Z 32005KT 1 SM RA BR OVC007 17/16 A2990 RMK RAB31
Visibility 1 SM in rain and mist, rain began at 2031Z.
200What is the forecast in the following TAF - KALO 201132Z 2012/2112 VRB05KT P6SM BKN110
Wind direction is varibale throughout the valid period in the TAF.
201What type of weather would you expect when you have unstable air, lifting action, and water vapor
Thunderstorm activity.
202What type of air mass would be expected when smoke, dust, haze and low visibility are present
Stable air mass.
203During flight, there is a close temperature dewpoint spread - what weather phenomenon can you expect
Fog.
204Weather reports indicate that there is a high moisture content, higher than normal lapse rate, and turbulent conditions - Which type of weather can you expect
Thunderstorm activity and unstable air.
205What conditions cause an unstable air mass
High humidity and high temperature.
206(Refer to figure 71) What condition is indicated by the light blue dashed lines
Freezing level MSL altitude.
207According to the following TAF, what will the weather conditions be for your arrival at the Louis Armstrong (KMSY) airport if your arrival time is 2030Z - KMSY 301120Z 3012/3112 10007KT P6SM FEW010 BKN060 OVC100 FM301500Z 09008KT P6SM OVC090 TEMPO 3015/3019 5SM OVC080 FM302000Z 12012KT P6SM OVC090 TEMPO 3020/3021 4SM TSRA OVC040CB FM302100Z 13013KT P6SM OVC070 TEMPO 3021/3023 4SM SHRA VCSH OVC040CB FM310000Z 10010KT P6SM FEW010
Overcast 9,000 feet, low visibility, thunderstorms, and rain.
208(Refer to figure 71) What does a low level significant weather chart tell you
Areas of VFR, MVFR and turbulence.
209In a situation where warm, moist air moves into a cold, dry inland are, what may result
Formation of fog.