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AMC1 MET.TR.250(d) SIGMET

ED Decision 2020/008/R

CRITERIA RELATED TO PHENOMENA

Sandstorm/dust storm should be considered:

(a)     heavy whenever the visibility is below 200 m and the sky is obscured; and

(b)     moderate whenever the visibility is:

(1)     below 200 m and the sky is not obscured; or

(2)     between 200 and 600 m.