8.7: Wind and Temperature Aloft Forecasts (FB)

Question 1

FB WBC 151745
DATA BASED ON 151200Z
VALID 1600Z FOR USE 1800-0300Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
ALS 2420 2635-08 2535-18 2444-30 245945 246755 246862
AMA 2714 2725+00 2625-04 2531-15 2542-27 265842 256352 256762
DEN 2321-04 2532-08 2434-19 2441-31 235347 236056 236262
HLC 1707-01 2113-03 2219-07 2330-17 2435-30 244145 244854 245561
MKC 0507 2006+03 2215-01 2322-06 2338-17 2348-29 236143 237252 238160
STL 2113 2325+07 2332+02 2339-04 2356-16 2373-27 239440 730649 731960

What wind is forecast for STL at 12,000 feet?

A. 230° magnetic at 39 knots.
B. 230° true at 39 knots.
C. 230° true at 106 knots.

Answer 1

230° true at 39 knots.

Question 2

FB WBC 151745
DATA BASED ON 151200Z
VALID 1600Z FOR USE 1800-0300Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
ALS 2420 2635-08 2535-18 2444-30 245945 246755 246862
AMA 2714 2725+00 2625-04 2531-15 2542-27 265842 256352 256762
DEN 2321-04 2532-08 2434-19 2441-31 235347 236056 236262
HLC 1707-01 2113-03 2219-07 2330-17 2435-30 244145 244854 245561
MKC 0507 2006+03 2215-01 2322-06 2338-17 2348-29 236143 237252 238160
STL 2113 2325+07 2332+02 2339-04 2356-16 2373-27 239440 730649 731960

Determine the wind and temperature aloft forecast for MKC at 6,000 ft.

A. 050° true at 7 knots, temperature missing.
B. 200° magnetic at 6 knots, temperature +3°C.
C. 200° true at 6 knots, temperature +3°C.

Answer 2

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

Question 3

FB WBC 151745
DATA BASED ON 151200Z
VALID 1600Z FOR USE 1800-0300Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
ALS 2420 2635-08 2535-18 2444-30 245945 246755 246862
AMA 2714 2725+00 2625-04 2531-15 2542-27 265842 256352 256762
DEN 2321-04 2532-08 2434-19 2441-31 235347 236056 236262
HLC 1707-01 2113-03 2219-07 2330-17 2435-30 244145 244854 245561
MKC 0507 2006+03 2215-01 2322-06 2338-17 2348-29 236143 237252 238160
STL 2113 2325+07 2332+02 2339-04 2356-16 2373-27 239440 730649 731960

What wind is forecast for STL at 12,000 feet?

A. 230° true at 39 knots.
B. 230° true at 56 knots.
C. 230° magnetic at 56 knots.

Answer 3

230° true at 39 knots.

Question 4

FB WBC 151745
DATA BASED ON 151200Z
VALID 1600Z FOR USE 1800-0300Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
ALS 2420 2635-08 2535-18 2444-30 245945 246755 246862
AMA 2714 2725+00 2625-04 2531-15 2542-27 265842 256352 256762
DEN 2321-04 2532-08 2434-19 2441-31 235347 236056 236262
HLC 1707-01 2113-03 2219-07 2330-17 2435-30 244145 244854 245561
MKC 0507 2006+03 2215-01 2322-06 2338-17 2348-29 236143 237252 238160
STL 2113 2325+07 2332+02 2339-04 2356-16 2373-27 239440 730649 731960

Determine the wind and temperature aloft forecast for DEN at 9,000 feet.

A. 230° magnetic at 53 knots, temperature 47°C.
B. 230° true at 53 knots, temperature –47°C.
C. 230° true at 21 knots, temperature –4°C.

Answer 4

230° true at 21 knots, temperature –4°C.

Question 5

FB WBC 151745
DATA BASED ON 151200Z
VALID 1600Z FOR USE 1800-0300Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
ALS 2420 2635-08 2535-18 2444-30 245945 246755 246862
AMA 2714 2725+00 2625-04 2531-15 2542-27 265842 256352 256762
DEN 2321-04 2532-08 2434-19 2441-31 235347 236056 236262
HLC 1707-01 2113-03 2219-07 2330-17 2435-30 244145 244854 245561
MKC 0507 2006+03 2215-01 2322-06 2338-17 2348-29 236143 237252 238160
STL 2113 2325+07 2332+02 2339-04 2356-16 2373-27 239440 730649 731960

What wind is forecast for STL at 9,000 feet?

A. 230° magnetic at 25 knots.
B. 230° true at 32 knots.
C. 230° true at 25 knots.

Answer 5

230° true at 32 knots.

Question 6

What values are used for Winds Aloft Forecasts?

A. Magnetic direction and knots.
B. Magnetic direction and miles per hour.
C. True direction and knots.

Answer 6

True direction and knots.

Question 7

When the term “light and variable” is used in reference to a Winds Aloft Forecast, the coded group and windspeed is

A. 0000 and less than 7 knots.
B. 9900 and less than 5 knots.
C. 9999 and less than 10 knots.

Answer 7

9900 and less than 5 knots.