Term
| A ceiling is define as the height of the |
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Definition
| lowest layer of clouds or obscuring phenomena aloft that is reported as broken or overcast. |
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Term
| The station originating the following weather report has a field elevation of 1,300 ft MSL. From the bottom of the overcast cloud layer, what is its thickness? (tops of OVC are reported at 3800 ft) |
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Definition
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Term
| The reporting station originating the Aviation Routine Weather Report has a field elevation of 620 ft. If the reported sky cover is one continuous layer, what is its thickness? (Tops of OVC are reported at 6500 ft) |
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Definition
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Term
What is meant by the entry in the remarks section of the METAR surface report for KBNA?
METAR KBNA 211250Z 33018KT 290V260 1/2SM R31/2700 +SN
BLSNFG VV008 00/M03 A 2991 RMK RAE42SNB42 |
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Definition
| Rain ended 42 past the hour, snow began 42 past the hour. |
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Term
What significant sky condition is reported in this METAR observation?
METAR KBNA 1250Z 33018KT 290V360 1.2SM R31/2700FT +SN BLSNFG VV008 00/M03 A2991 RMK RERAE42SNB42 |
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Definition
| Sky is obscured with vertical visibility of 800 ft. |
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Term
| The body of a Terminal Aerodrome Forecast (TAF) covers a geographical proximity within a |
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Definition
| 5 statue mile radius from the center of an airport runway complex. |
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Term
| Which primary source should be used to obtain forecast weather information at your destination for the planned ETA? |
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Definition
| Terminal Aerodrome Forecast (TAF) |
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Term
| A "VRB" wind entry in a Terminal Aerodrome Forecast (TAF) will be indicated when the wind is |
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Definition
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Term
| When the visibility is greater than 6 SM on a TAF it is expressed as |
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Definition
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Term
What is the forecast wind at 1800Z in the following TAF?
KMEM 091740Z 1818 00000KT 1/2SM RAFG OVC005= |
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Definition
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Term
| From which primary source should you obtain information regarding the weather expected to exist at your destination at your estimated time of arrival? |
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Definition
| Terminal Aerodrome Forecast |
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Term
What is the wind shear forecast in the following TAF?
KCVG 231051Z 231212 12012KT 4SM -RA BR OVC008 WS005/27050KT TEMOP 1719 1/2SM -RA FG FM1930 09012KT 1SM -DZ BR VV003 BECMG 2021 5SM HZ= |
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Definition
| 500 ft AGL from 270 at 50 knots |
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Term
| "WND" in the categorical outlook in the Aviation Area Forecast means that the wind during that period is forecast to be |
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Definition
| sustained surface wind speed of 20 knots or greater |
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Term
| Area forecasts generally include a forecast period of 18 hours and cover a geographical |
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Definition
| area the size of several states |
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Term
| Which is true regarding the use of airborne weather-avoidance radar for the recognition of certain weather conditions? |
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Definition
| The radarscope provides no assurance of avoiding instrument weather conditions. |
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Term
| Pilots on IFR flights seeking ATC in-flight weather avoidance assistance should keep in mind that |
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Definition
| ATC radar limitations and, frequency congestion may limit the controllers capability to provide this service. |
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Term
Which response most closely interprets the following PIREP?
UA/OV OKC 063064/TM 1522/FL080/TP C172/ TA M04/WV 245040/ TB LGT/RM IN CLR |
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Definition
| 64 nautical miles on the 63 degree radial from Oklahoma City VOR at 1522 UTC, flight level 8,000 ft. Type of aircraft is a Cessna 172 |
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Term
Interpret this PIREP.
MRB UA/OV MRB/TM1430/FL060/TPC182/SK BKN BL/WX RA/TB MDT |
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Definition
| At 6,000 ft; between layers; moderate turbulence; moderate rain. |
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Term
| Which values are used for winds aloft forecasts? |
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Definition
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Term
| What wind direction and speed is represented by the entry 9900=00 for 9,000 ft, on an Winds and Temperatures Aloft Forecast (FD)? |
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Definition
| Light and variable, less than five knots. |
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Term
| When is the temperature at one of the forecast altitudes omitted at a specific location or station in the Winds and Temperatures Aloft Forecast (FD)? |
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Definition
| For the 3,000 ft altitude (level) or when the level is within 2,500 ft of station elevation. |
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Term
| When is the wind-group at one of the forecast altitudes omitted at a specific location or station in the Winds and Temperatures Aloft Forecast (FD)? When the wind |
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Definition
| at the altitude is within 1,500 ft of the station elevation. |
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Term
Decode the excerpt from the Winds and Temperatures Aloft Forecast (FD) for OCK at 39,000 ft
OKC: 830558 |
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Definition
| Wind at 330 at 105 knots, temperature -58C |
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Term
| (Refer to figure 2) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when planning for a flight over PSB at FL 270? |
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Definition
| 255 true at 93 knots; ISA +6C |
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Term
| (Refer to figure 2) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when planning for a flight over ALB at FL270? |
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Definition
| 275 true at 97 knots; ISA +4C |
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Term
| (Refer to figure 2) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when planning for a flight over EMI at FL270? |
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Definition
| 265 true; 100 knots; ISA +3C |
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Term
| A station is forecasting wind and temperature aloft at FL390 to be 300 at 200 knots; tempertuare -54C. How would this data be decoded in the FD? |
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Definition
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Term
| (Refer to figure 12) What is the approximate wind direction and velocity at 34,000 ft (see arrow C)? |
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Definition
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Term
| (Refer to figure 12) The wind direction and velocity on the Observed Winds Aloft Chart (see arrow A) is indicated from the |
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Definition
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Term
| (Refer to figure 12) What is the approximate wind direction and velocity at CVG at 34,000 ft (see arrow A)? |
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Definition
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Term
| (Refer to figure 12, arrow B) What is the approximate wind direction and velocity at BOI? |
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Definition
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Term
| When are sever weather watch bulletins (WW) issued? |
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Definition
| Unscheduled and issued as required. |
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Term
| SIGMETs are issued as a warning of weather conditions potentially hazardous |
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Definition
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Term
| Which meteorological condition is issued in the form of a SIGMET (WS)? |
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Definition
| Widespread sand or dust storms affecting at least 3,000 square miles or an area deemed to have a significant effect on the safety of aircraft operations. |
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Term
| A pilot planning to depart at 1100Z on an IFR flight is particularly concerned about the hazard of icing. What sources reflect the most accurate information on icing conditions (current and forecast) at the time of departure? |
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Definition
| Pilot weather reports (PIREPs), AIRMETs, and SIGMETs. |
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Term
| The Hazardous Inflight Weather Advisory Service (HIWAS) is a continuous broadcast over selected VORs of |
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Definition
| SIGMETs, CONVECTIVE SIGMETs, AIRMETs, Severe Weather Forecasts Alerts (AWW), and Center Weather Advisories |
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Term
| What is the maximum forecast period for AIRMETs? |
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Definition
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Term
| AIRMETs are issued on a scheduled basis every |
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Definition
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Term
| On what frequency should you obtain En Route Flight Advisory Service below FL180? |
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Definition
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Term
| What information is provided by a Convective Outlook (AC)? |
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Definition
| It provides prospects of both general and severe thunderstorm activity during the following 24 hours. |
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Term
| Which weather forecast describes prospects for an area coverage of both severe and general thunderstorms during the following 24 hours? |
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Definition
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Term
| What does a Convective Outlook (AC) describe for a following 24 hours period? |
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Definition
| General thunderstorm activity |
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Term
| (Refer to figure 9) The Severe Weather Outlook Chart depicts |
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Definition
| areas of probable severe thunderstorms by the use of single hatched areas on the chart. |
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Term
| (Refer to figure 9) The Severe Weather Outlook Chart, which is used primarily for advance planning, provides what information |
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Definition
| a 24-hour severe weather outlook for possible thunderstorm activity. |
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Term
| (Refer to figure 9) Using the DAY 2 CONVECTIVE OUTLOOK, what type of thunderstorms, if any, may be encountered on a flight from Montana to central California? |
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Definition
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Term
| (Refer to figure 9) What type of thunderstorm activity is expected over Montana on April 4 at 0800Z? |
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Definition
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Term
| The Surface Analysis Chart depicts |
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Definition
| actual frontal positions, pressure patterns, temperature, dew point, wind, weather, and obstructions to vision at the valid time of the chart. |
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Term
| (Refer to figure 4) What is the meaning of a bracket (]) plotted to the right of the station circle on a weather depiction chart? |
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Definition
| The station is an automated observation location |
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Term
| (Refer to figure 4) The Weather Depiction Chart indicates the heaviest precipitation is occurring in |
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Definition
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Term
| (Refer to figure 4) The Weather Depiction Chart in the area of northwestern Wyoming, indicates |
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Definition
| 500 foot ceilings and continuous rain, less than 3 miles visibility. |
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Term
| What important information is provided by the Radar Summary Chart that is not shown on other weather charts? |
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Definition
| Lines and cells of hazardous thunderstorms. |
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Term
| (Refer to figure 8) What weather conditions are depicted in the area indicated by arrow A on the Radar Summary Chart? |
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Definition
| Strong to very strong echoes; echo tops 30,000 feet MSL; thunderstorms and rain showers. |
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Term
| (Refer to figure 8) What weather conditions are depicted in the area indicated by arrow D on the Radar Summary Chart? |
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Definition
| Intense to extreme echoes within the smallest contour, echo tops 29,000 feet MSL, and cell movement toward the northeast at 50 knots. |
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Term
| (Refer to figure 8)What weather conditions are depicted in the area indicated by arrow C on the Radar Summary Chart? |
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Definition
| Area movement toward the northeast strong to very strong echoes, and echo tops 28,000 ft MSL. |
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Term
| (Refer to figure 8) What weather conditions are depicted in the area indicated by arrow B on the Radar Summary chart? |
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Definition
| Weak to moderate echoes, rain showers increasing in intensity. |
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Term
| (Refer to figure 8) What weather conditions are depicted in the area indicated by arrow E on the Radar Summary Chart? |
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Definition
| Highest echo tops 30,000 ft MSL, weak to moderate echoes, thunderstroms and rain showers, and cell movement toward northwest at 15 knots. |
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Term
| (Refer to figure 8) What weather conditions are depicted in the area indicated by arrow G on the Radar Summary Chart? |
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Definition
| Echo bases 10,000 ft MSL; cell movement toward northeast at 15 knots; weak to moderate echoes; rain. |
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Term
(Refer to figure 8)
What weather conditions are depicted in the area indicated by arrow F on the Radar Summary Chart? |
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Definition
| Line of echoes; thunderstorms; highest echo tops 45,000 ft MSL; no line movement indicated. |
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Term
| For most efffective use of the Radar Summary Chart during preflight planning, a pilot should |
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Definition
| know the chart displays precipitation only; it does not display clouds, fog, fronts, or other boundaries. |
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Term
| What flight planning information can a pilot derive from constant pressure charts? |
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Definition
| Winds and temperatures aloft. |
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Term
| What conclusion(s) can be drawn from a 500-millibar Constant Pressure Chart for a planned flight at FL180? |
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Definition
| Observed temperature, wind, and temperature/dewpoint spread along the proposed route can be approximated. |
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Term
| The Low-Level Significant Weather Prognostic Chart depicts weather conditions |
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Definition
| that are forecast to exist at a valid time shown on the chart. |
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Term
| A prognostic chart depicts the conditions |
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Definition
| forecast to exist at a specific time in the future |
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Term
| Which meteorological conditions are depicted by a prognostic chart? |
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Definition
| Conditions forecast to exist at a specific time shown on the chart. |
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Term
| (Refer to figure 5) What is the meaning of the symbol depicted as used on the US Low-Level Significant Weather Prog Chart? |
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Definition
| Shower precipitation (eg rain showers) embedded in an area of continuous rain covering half or more of the area. |
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Term
| (Refer to figure 18, SFC PROG) A planned low altitude flight from northern Florida to southern Florida at 00Z is likely to encounter |
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Definition
| showery precipitation, thunderstorms/rain showers covering half or more of the area. |
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Term
| (Refer to figure 18, SFC-400 MB) The 24 hour Low Level Significant Weather Prog at 12 Z indicates that southwestern West Virginia will likely experience |
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Definition
| ceilings less than 1,000 ft, visibility less than 3 miles. |
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Term
| (Refer to figure 18, SFC-400 MB) The US Low Level Significant Weather Surface Prog Charts at 00Z indicates that northwestern Colorado and eastern Utah can expect |
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Definition
| moder or greater turbulence from the surface to FL240. |
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Term
| (Refer to figure 18, SFC-PROG) The chart symbols shown in the Gulf of Mexico at 12Z and extending into AL, GA, SC, and northern FL indicate a |
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Definition
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Term
| (Refer to figure 7) What weather conditions are depicted within the area indicated by arrow E? |
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Definition
| Occasional cumulonimbus, 1/8 to 4/8 coverage, bases below 24,000 ft MSL, and tops at 40,000 ft MSL |
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Term
| (Refer to figure 7) What weather conditions are depicted within the area indicated by arrow D? |
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Definition
| Forecast isolated embedded cumulonimbus clouds with tops of 43,000 ft MSL, and less than 1/8 coverage. |
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Term
| (Refer to figure 7) What weather conditions are predicted within the area indicated by arrow C? |
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Definition
| Moderate turbulence at 35,000 ft MSL |
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Term
| (Refer to figure 7) What weather conditions are depicted within the area indicated by arrow B? |
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Definition
| Moderate turbulence from below 24,000 ft MSL to 37,000 ft MSL |
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Term
| (Refer to figure 20) What is the maximum wind velocity forecast in the jet stream shown on the high level Significant WEather PRognostic Chart over Canada? |
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Definition
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Term
| (Refer to figure 20) What is the height of the tropopause over Kentucky? |
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Definition
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Term
| (Refer to figure 7) The symbol on the US High Level Significant Weather PRog, indicated by arrow G, represents the |
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Definition
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Term
| (Refer to figure 7) The area indicated by arrow H indicates |
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Definition
| moderate turbulence at and below 34,000 ft. |
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Term
| (Refer to figure 7) What information is indicated by arrow A? |
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Definition
| The height of the tropopause in hundreds of feet above MSL |
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Term
| (Refer to figure 7) What weather conditions are depicted within the area indicated by arrow F? |
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Definition
| Occasionally embedded cumulonimbus, bases below 24,000 ft with tops to 48,000 ft. |
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