SIGWX Symbols Flashcards by Jason Norman

SIGWX Medium (SWM) is between Flights Levels?

FL100 to FL250 – SIGWX Medium (SWM)

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SIGWX Heigh (SWH) is between Flights Levels?

FL250 to FL630 – SIGWX High (SWH)

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SIGWX Symbol?

Tropical cyclone

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SIGWX Symbol?

Moderate turbulence

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SIGWX Symbol?

Severe turbulence

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SIGWX Symbol?

Moderate aircraft
icing

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SIGWX Symbol?

Severe aircraft icing

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SIGWX Symbol?

Volcanic eruption

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SIGWX Symbol?

Tropopause high

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SIGWX Symbol?

Tropopause low

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SIGWX Symbol?

Position, speed and
level of jet stream.

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SIGWX Symbol?

The flight levels
between which winds
are greater than 80 KT

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SIGWX Symbol?

Surface cold
front

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SIGWX Symbol?

20 KT change in jet
stream wind speed

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SIGWX Symbol?

Tropopause level

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SIGWX Symbol?

Radioactive
materials in the
atmosphere

XXX is used on a SIGWX chart when?

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