- visibility of 10 km or more, and the lowest visibility is not reported(Note 1: In local routine and special reports, visibility refers to the value(s) to be reported in accordance with ICAO Annex 3 220.127.116.11 and 18.104.22.168; in METAR and SPECI, visibility refers to the value(s) to be reported in accordance with ICAO Annex 3 22.214.171.124.)(Note 2: The lowest visibility is reported in accordance with ICAO Annex 3 126.96.36.199.);
- no cloud of operational significance; and
- no weather of significance to aviation as given in ICAO Annex 3 188.8.131.52, 184.108.40.206, and 220.127.116.11;
ICAO, 2007: Meteorological Service for International Air Navigation. Annex 3 to the Convention on International Civil Aviation. 16th ed., International Civil Aviation Organization, 187 pp. Accessed 18 November 2020. Available at https://www.wmo.int/pages/prog/www/ISS/Meetings/CT-MTDCF-ET-DRC_Geneva2008/Annex3_16ed.pdf.
Term edited 18 November 2020.