Occasional towering cumulus cloud Occasional towering cumulus cloud OCNL TCU Occasional cumulonimbus cloud Occasional cumulonimbus cloud OCNL CB Isolated cumulonimbus cloud Isolated cumulonimbus cloud ISOL CB ICAO Annex 3/ WMO No. 49-2 Appendix 6 Section 2.1 Moderate icing Moderate icing MOD ICE Broken cloud Broken cloud BKN CLD Air Wx Phenomena Widespread mean surface wind Widespread mean surface wind SFC WIND nn[n]MPS Mountain obscuration Mountain obscuration MT OBSC Surface visibility Surface visibility SFC VIS nnnnM (mm) Occasional thunderstorms Occasional thunderstorms OCNL TS Frequent cumulonimbus cloud Frequent cumulonimbus cloud FRQ CB 2016-12-30T13:26:05.884Z Frequent towering cumulus cloud Frequent towering cumulus cloud FRQ TCU Overcast cloud Overcast cloud OVC CLD Isolated towering cumulus cloud Isolated towering cumulus cloud ISOL TCU Moderate mountain wave Moderate mountain wave MOD MTW Moderate turbulence Moderate turbulence MOD TURB Isolated thunderstorms with hail Isolated thunderstorms with hail ISOL TSGR Isolated thunderstorms Isolated thunderstorms ISOL TS Occasional thunderstorms with hail Occasional thunderstorms with hail OCNL TSGR 1