SIGWX Symbols

Question 1

SIGWX Medium (SWM) is between Flights Levels?

Answer 1

FL100 to FL250 – SIGWX Medium (SWM)

Question 2

SIGWX Heigh (SWH) is between Flights Levels?

Answer 2

FL250 to FL630 – SIGWX High (SWH)

Question 3

SIGWX Symbol?

Answer 3

Tropical cyclone

Question 4

SIGWX Symbol?

Answer 4

Moderate turbulence

Question 5

SIGWX Symbol?

Answer 5

Severe turbulence

Question 6

SIGWX Symbol?

Answer 6

Moderate aircraft
icing

Question 7

SIGWX Symbol?

Answer 7

Severe aircraft icing

Question 8

SIGWX Symbol?

Answer 8

Volcanic eruption

Question 9

SIGWX Symbol?

Answer 9

Tropopause high

Question 10

SIGWX Symbol?

Answer 10

Tropopause low

Question 11

SIGWX Symbol?

Answer 11

Position, speed and
level of jet stream.

Question 12

SIGWX Symbol?

Answer 12

The flight levels
between which winds
are greater than 80 KT

Question 13

SIGWX Symbol?

Answer 13

Surface cold
front

Question 14

SIGWX Symbol?

Answer 14

20 KT change in jet
stream wind speed

Question 15

SIGWX Symbol?

Answer 15

Tropopause level

Question 16

SIGWX Symbol?

Answer 16

Radioactive
materials in the
atmosphere

Question 17

XXX is used on a SIGWX chart when?

Answer 17

If the top/base is above/below the level of the chart coverage