Squall Squall SQ Small Hail Small Hail GS Mist Mist BR Volcanic Ash Volcanic Ash VA Sand Sand SA Weather Causing Visibility Reduction Haze Haze HZ Dust Dust DU Sandstorm Sandstorm SS Drizzle Drizzle DZ Smoke Smoke FU Snow grams Snow grams SG Ice pellets Ice pellets PL Rain Rain RA 1 Fog Fog FG Snow Snow SN Dust/stand whirls Dust/stand whirls PO 2016-12-30T13:26:25.95Z ICAO Annex 3/ WMO No. 49-2 Appendix 6 Section 2.1 under SFC VIS Duststorm Duststorm DS Funnel Cloud Funnel Cloud FC Hail Hail GR