VISIBILITY IN SMOKE MAY BE LOWER THAN INDICATED IN AUTO
METAR/SPECI AND AD WX INFO SER (AWIS) 
THICK LAYERS OF SMOKE MAY BE REPORTED AS CLOUD OR CLOUD LAYERS IN
AUTO METAR/SPECI AND AWIS
DETAILED INFO ABOUT ELEVATED SMOKE LAYERS AND REDUCED VISIBILITY WI
AFFECTED VERTICAL LAYERS WILL BE PROVIDED IN THE RMK SECTION OF THE
GAF
FOR DETAILED BRIEFINGS CONTACT BUREAU OF MET ON THE TEL NUMBER
PROVIDED IN RELEVANT GAF