Term
| A report of meteorological phenomena encountered by aircraft in flight is called a(n) |
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Definition
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Term
| PIREPs are the only means of precisely determining __ and __ weather conditions. |
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| When the ceiling is at or below 5,000 feet and the visibility is less than 5 miles, controllers are obligated to __ PIREPs. |
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Definition
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| A decrease of temperature with an increase in height is called a(n) __. |
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Definition
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| An altimeter depicts indicated altitude, which is altitude expressed as height above __. |
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Definition
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Term
| Two types of barometers used to measure atmospheric pressure are __ and __. |
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Definition
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Term
| In a METAR, temperature and dew point are shown in whole degrees __. |
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Definition
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Term
| Anticipate __ when temperature-dewpoint spread is 5 degrees or less and decreasing. |
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Definition
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Term
| An increase in temperature of the atmosphere with an increase of altitude height defines a(n)__. |
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Definition
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Term
| Weather advisories issued to amend an area forecast regarding weather phenomena that are of operational interest to all aircraft and potentially hazardous to aircraft are classified as __. |
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Definition
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Term
| Weather advisories issued for extreme turbulence and severe icing are classified as __. |
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Definition
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Term
| Advisories for existing and forecast weather involving tornadoes, embedded thunderstorms are classified as __. |
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Definition
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Term
| In the troposphere, the lapse rate is approximately __C per one thousand feet |
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Definition
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Term
| Convective currents are the result of __. |
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Definition
| uneven heating of the earth |
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Term
| Air is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere due to __. |
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Definition
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Term
| In the Northern Hemisphere, air movement around a low pressure center flows in a(n) __ direction. |
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Definition
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Term
| The uneven heating of adjacent bodies of air causing warm air to be drawn upward and more dense air downward defines __. |
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Definition
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Term
| A narrow, high-speed, meandering band of air moving at a high altitude is called a __. |
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Definition
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Term
| What are the two basic classifications of clouds? |
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Definition
| cumuliform and stratiform |
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Term
| Clouds formed by vertical currents of unstable air are called __ clouds. |
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Definition
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Term
| Clouds formed by the cooling of stable air are called __ clouds. |
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Definition
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Term
| Lines drawn on a weather map around pressure areas to connect the points of equal pressure are called __. |
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Definition
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Term
| When a mass of cold air replaces warm air, a __ front occurs. |
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Definition
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Term
| A squall line is a narrow band of __. |
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Definition
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Term
| Warm air slides over a wedge of colder air when a __ front progresses forward. |
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Definition
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Term
| Behind fast-moving cold front, you can expect __ skies with gusty and turbulent winds. |
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Definition
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Term
| The weather phenomenon particularly hazardous to aviation is __. |
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Definition
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Term
| The three principle types of fronts are cold, warm, and __. |
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Definition
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Term
| The most common forms of precipitation that cause restrictions to visibility are __,__, and __. |
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Definition
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Term
| Rain rarely reduces surface visibility to less than __ mile(s). |
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Definition
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Term
| Three types of structural icing are clear, __, and mixed. |
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Definition
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Term
| When accumulation of aircraft icing is such that deicing/antiicing equipment fail to remove or reduce it, the icing intensity is reported as |
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Definition
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Term
| One of the most common and persistent weather hazards encountered in aviation is __ |
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Definition
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Term
| The most frequent cause of surface visibility below 3 miles is __. |
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Definition
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Term
| Clear ice is considered dangerous to aircraft in flight because it is __. |
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Definition
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Term
| Small, dangerous downdrafts of wind extending horizontally 2.5 miles or less with wind speeds of up to 150 knots are called __. |
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Definition
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Term
| Clear Air Turbulence (CAT) most generally occurs at high altitude and in the vicinity of __. |
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Definition
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Term
| The initial stage of a thunderstorm occurs in a __ cloud. |
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Definition
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Term
| The mature stage of a thunderstorm is reached when __ begins. |
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Definition
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Term
| Airports equipped with LLWAS-Network Expansion (LLWAS systems integrated with TDWR and TDWR systems) provide the capability of detecting wind shear alerts and __. |
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Definition
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Term
| Two thunderstorm hazards to aircraft are hail and __. |
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Definition
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Term
| A violently rotating column of air in contact with the ground and associated with a thunderstorm is called a __. |
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Definition
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Term
| Pressure, temperature, and humidity are used to determine __ altitude. |
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Definition
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Term
| What type of Aviation Routine Weather Report would be generated when a wind shift occurs? |
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Definition
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Term
| An Aviation Routine Weather Report taken after an aircraft mishap is called a __ observation. |
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Definition
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Term
| A change in wind speed and/or direction in a short distance is called a __. |
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Definition
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Term
| In a METAR report, the height of a cloud base is reported in __ of feet above ground level (AGL). |
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Definition
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Term
| Broken sky cover means that __ to 7/8 of the sky is obscured by clouds. |
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Definition
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Term
| Station identifiers for all weather reporting stations in the conterminous United States will begin with the letter __. |
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Definition
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Term
| The greatest distance that can be seen throughout at least half the horizon circle describes __ visibility. |
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Definition
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Term
| "+TSRAGR" encoded in a METAR indicates a __. |
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Definition
| thunderstorm, heavy rain, and hail |
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Term
| Wind direction is determined by the direction __ the wind is blowing. |
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Definition
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Term
| Wind speed is the average speed given in __. |
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Definition
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Term
| The standard pressure at sea level is __ inches of mercury. |
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Definition
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Term
| The METAR entry "SCT020 BKN250" is decoded as "__." |
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Definition
| "two thousand scattered, ceiling two five thousand broken" |
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Term
| The METAR entry "FEW025TCU SCT040" is decoded as "__." |
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Definition
| "few clouds at two thousand five hundred, towering cumulus, four thousand scattered" |
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Term
| "CIG 005V008" in the remarks section of a METAR indicates "__." |
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Definition
| ceiling variable between five hundred and eight hundred |
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Term
| In a METAR report, the altimeter element follows the __ group. |
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Definition
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Term
| A very small downward gust of air (2.5 miles or less in diameter) is called a __. |
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Definition
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Term
| Tower personnel shall take prevailing visibility observations when prevailing visibility at the usual point of observation or at a tower level is less than __ mile(s). |
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Definition
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Term
| A SPECI will be taken when __. |
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Definition
| an aircraft accident has occured |
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