Figure 17 
(Refer to figure 17.) Determine the wind and temperature aloft 
forecast for MKC at 6,000 ft. 





   ANSWER: 200° true at 6 knots, temperature +3°C. 

   Refer to the FD forecast in Fig. 17. 
   Locate MKC on the left side of the chart and move to the 
   right to the 6,000-ft. column. The wind and temperature 
   forecast is coded as 2006+03, which translates as the 
   forecast wind at 200° true at 6 kt. and a temperature of 3°C. 

Figure 17 
(Refer to figure 17.) What wind is forecast for STL at 9,000 feet? 





   ANSWER: 230° true at 32 knots. 

   Refer to the FD forecast in Fig. 17. 
   Locate STL on the left side of the chart and move right to 
   the 9,000-ft. column. The coded wind forecast (first four 
   digits) is 2332. Thus, the forecast wind is 230° true at 32 kt. 

To obtain a continuous transcribed weather briefing, including 
winds aloft and route forecasts for a cross-country flight, a pilot 
should monitor a 





   ANSWER: Transcribed Weather Broadcast (TWEB) on an NDB or a 
   VOR facility. 

   To obtain a continuous transcribed 
   weather briefing, including winds aloft and route forecasts 
   for a cross-country flight, a pilot should monitor a TWEB on 
   the ADF (low-frequency) radio receiver and/or the VOR. 

SIGMET's are issued as a warning of weather conditions hazardous 
to which aircraft? 





   ANSWER: All aircraft. 

   SIGMETs (significant meteorological 
   information) warn of weather considered potentially 
   hazardous to all aircraft. SIGMET advisories cover severe 
   and extreme turbulence; severe icing; and widespread 
   duststorms, sandstorms, or volcanic ash that reduce 
   visibility to less than 3 SM. 

AIRMETs are advisories of significant weather phenomena but of 
lower intensities than SIGMETs and are intended for dissemination 
to 





   ANSWER: all pilots. 

   AIRMETs are advisories of 
   significant weather phenomena that describe conditions at 
   intensities lower than those which require the issuance of 
   SIGMETs. They are intended for dissemination to all pilots. 

Which in-flight advisory would contain information on severe icing 
not associated with thunderstorms? 





   ANSWER: SIGMET. 

   SIGMET advisories cover severe icing 
   not associated with thunderstorms; severe or extreme 
   turbulence or clear air turbulence not associated with 
   thunderstorms; dust-storms, sandstorms, or volcanic ash 
   that reduce visibility to less than 3 SM; and volcanic 
   eruption. 

What information is contained in a CONVECTIVE SIGMET? 





   ANSWER: Tornadoes, embedded thunderstorms, and hail 3/4 inch or 
   greater in diameter. 

   Convective SIGMETs are issued for 
   tornadoes, lines of thunderstorms, embedded thunderstorms 
   of any intensity level, areas of thunderstorms greater than or 
   equal to VIP level 4 with an area coverage of 40% or more, 
   and hail ¾ in. or greater. 

What is indicated when a current CONVECTIVE SIGMET forecasts 
thunderstorms? 





   ANSWER: Thunderstorms obscured by massive cloud layers. 

   Convective SIGMETs are issued for 
   tornadoes, lines of thunderstorms, embedded (i.e., obscured 
   by massive cloud layers) thunderstorms of any intensity 
   level, areas of thunderstorms greater than or equal to VIP 
   level 4 with an area coverage of 40% or more, and hail ¾ in. 
   or greater. 

Figure 18 
(Refer to figure 18.) The IFR weather in northern Texas is due to 





   ANSWER: low ceilings. 

   Refer to the Weather Depiction Chart 
   in Fig. 18. The shaded area around northern Texas and 
   central Oklahoma indicates that IFR conditions exist. The 
   symbols "3=S" and "3=T" mean that the visibility is 3 SM in 
   fog (3=), and the sky is overcast at 600 ft. ( S ) to 800 ft. ( T ) 
   AGL. Thus, low ceilings between 600-800 ft. are the source 
   of IFR weather conditions. 

Figure 18 
(Refer to figure 18.) What is the status of the front that extends 
from Nebraska through the upper peninsula of Michigan? 





   ANSWER: Cold. 

   Refer to the Weather Depiction Chart 
   in Fig. 18. The front that extends from Nebraska through the 
   upper peninsula of Michigan is a cold front, as shown by 
   the pointed scallops on the southern side of the frontal line. 

Figure 18 
(Refer to figure 18.) Of what value is the Weather Depiction Chart 
to the pilot? 





   ANSWER: For determining general weather conditions on which to 
   base flight planning. 

   The weather depiction chart is 
   prepared from surface aviation weather reports giving a 
   quick picture of weather conditions as of the time stated on 
   the chart. Thus, it presents general weather conditions on 
   which to base flight planning. 

Figure 18 
(Refer to figure 18.) What weather phenomenon is causing IFR 
conditions in central Oklahoma? 





   ANSWER: Low ceilings and visibility. 

   Refer to the Weather Depiction Chart 
   in Fig. 18. In central Oklahoma, the IFR conditions are 
   caused by low ceilings and visibility. In the shaded area 
   over central Oklahoma and northern Texas, there are six 
   darkened circles with numbers ranging from one to eight 
   below them, signifying overcast skies with ceilings at 100 to 
   800 ft. The circles also have numbers ranging from 3/4 to 3 
   beside them, signifying visibilities between 3/4 and 3 statute 
   miles. The IFR conditions are therefore due to low ceilings 
   and visibility. 

Figure 18 
(Refer to figure 18.) According to the Weather Depiction Chart, the 
weather for a flight from southern Michigan to north Indiana is 
ceilings 





   ANSWER: greater than 3,000 feet and visibility greater than 5 miles. 

   Refer to the Weather Depiction Chart 
   in Fig. 18. The weather from southern Michigan to north 
   Indiana is shown by the lack of shading or contours to have 
   ceilings greater than 3,000 ft. and visibilities greater than 5 
   miles. 

Figure 18 
(Refer to figure 18.) The marginal weather in central Kentucky is 
due to low 





   ANSWER: ceiling. 

   Refer to the Weather Depiction Chart 
   in Fig. 18. The MVFR weather in central Kentucky is 
   indicated by the contour line without shading. The station 
   symbol indicates an overcast ceiling at 3,000 ft. MVFR is 
   ceiling 1,000 ft. to 3,000 ft. and/or visibility 3 to 5 SM. Thus, 
   the marginal weather is due to a low ceiling. 

Figure 19 
(Refer to figure 19, area B.) What is the top for precipitation of the 
radar return? 





   ANSWER: 24,000 feet MSL. 

   Refer to the Radar Summary Chart in 
   Fig. 19. The radar return at B (northern Nevada) has a "240" 
   with a line under it. This means the maximum top of the 
   precipitation is 24,000 ft. MSL. 


What does the heavy dashed line that forms a large rectangular 
box on a radar summary chart refer to? 





   ANSWER: Severe weather watch area. 

   On a Radar Summary Chart, severe 
   weather watch areas are outlined by heavy dashed lines. 

Figure 19 
(Refer to figure 19, area B.) What type of weather is occurring in 
the radar return? 





   ANSWER: Continuous rain. 

   Refer to the Radar Summary Chart in 
   Fig. 19. The radar return around point B is labeled with an 
   "R." This means rain (R) that is light to moderate due to the 
   single contour, and is steady or continuous, due to the lack 
   of an intensity symbol (+ or -). 

Figure 19 
(Refer to figure 19, area D.) What is the direction and speed of 
movement of the cell? 





   ANSWER: North at 17 knots. 

   Refer to the Radar Summary Chart in 
   Fig. 19. The radar return at D (Virginia) has an arrow pointing 
   north with "17" at the point. The movement is thus north at 
   17 kt. 

Figure 19 
(Refer to figure 19, Area E.) The top of the precipitation of the cell 
is 





   ANSWER: 16,000 feet MSL. 

   Refer to the Radar Summary Chart in 
   Fig. 19. The cell <189> in. below point E (Virginia/North 
   Carolina) has a "160" with a line under it. This means the 
   maximum top of the precipitation is 16,000 ft. MSL. 

What information is provided by the Radar Summary Chart that is 
not shown on other weather charts? 





   ANSWER: Lines and cells of hazardous thunderstorms. 

   The Radar Summary Charts show 
   lines of thunderstorms and hazardous cells that are not 
   shown on other weather charts. 

Radar weather reports are of special interest to pilots because they 
indicate 





   ANSWER: location of precipitation along with type, intensity, and 
   cell movement of precipitation. 

   Radar weather reports are of special 
   interest to pilots because they report the location of 
   precipitation along with type, intensity, and cell movement. 

Figure 20 
(Refer to figure 20.) What weather is forecast for the Florida area 
just ahead of the stationary front during the first 12 hours? 





   ANSWER: Ceiling 1,000 to 3,000 feet and/or visibility 3 to 5 miles with 
   continuous precipitation. 

   Refer to the Significant Weather 
   Prognostic Chart in Fig. 20. During the first 12 hr. (bottom 
   and top left panels), the weather just ahead of the stationary 
   front which extends from coastal Virginia into the Gulf of 
   Mexico is forecast to have ceilings from 1,000 to 3,000 ft. 
   and/or visibility 3 to 5 SM (as indicated by the scalloped 
   lines) with continuous light to moderate rain covering more 
   than half the area (as indicated by the shading). 

Figure 20 
(Refer to figure 20.) Interpret the weather symbol depicted in Utah 
on the 12-hour Significant Weather Prognostic Chart. 





   ANSWER: Moderate turbulence, surface to 18,000 feet. 

   Refer to the upper left panel of the 
   Significant Weather Prog Chart in Fig. 20. In Utah, the 
   weather symbol indicates moderate turbulence as 
   designated by the symbol of a small peaked hat. Note that 
   the broken line indicates moderate or greater turbulence. The 
   peaked hat is the symbol for moderate turbulence. The 180 
   means the moderate turbulence extends from the surface 
   upward to 18,000 ft. 

Figure 20 
(Refer to figure 20.) At what altitude is the freezing level over the 
middle of Florida on the 12-hour Significant Weather Prognostic 
Chart? 





   ANSWER: 12,000 feet. 

   Refer to the upper left panel of the 
   Significant Weather Prog Chart in Fig. 20. On prog charts, 
   the freezing level is indicated by a dashed line, with the 
   height given in hundreds of feet MSL. In Fig. 20, there is a 
   dashed line across the middle of Florida, marked with "120" 
   just off the coast. This signifies that the freezing level is 
   12,000 ft. MSL. 

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