Weather charts are compiled by the Weather Bureau from information obtained from satellite observations, weather stations and selected vessels at sea which transmit detailed weather reports every six hours in coded form.
Iitshati zemozulu zenziwa liqumrhu lezemozulu ngokwenkcukacha ezifanyanwa ngezilolongo ngenkwenkwezi ejikeleza enye, izitishi zemozulu neenqanawa ezikhethiweyo elwandle ezitsala iziphumo zemozulu qho ngeyure yesithandathu ngokwengqokelela yemithetho eqingqiweyo.