World Weather Watch Manuals and Guides Manuals and Guides WMO No./TD No Publication WMO No. 986 World Weather Watch - Status Report on Implementation CBS OPAG DPFS TD No. 778 Documentation on RSMC Support for Environmental Emergency Response (targeted for meteorologists at NMSs) WMO No. 485 Manual on the GDPFS WMO No. 1091 Guidelines on Ensemble Prediction Systems and Forecasting (2012) WMO No. 1132 Forecast Verification for the African Severe Weather Forecasting Demonstration Projects (2014) CBS OPAG IOS WMO No. 544 Manual on the Global Observing System WMO No. 488 Guide to the Global Observing System CBS OPAG ISS WMO No. 386 Manual on the Global Telecommunication System WMO No. 1060 Manual on the WMO Information System WMO No. 1061 Guide to the WMO Information System WMO No. 306 Manual on Codes WMO No. 1115 Guide on Virtual Private Networks (VPN) via the Internet between GTS centres WMO No. 1116 Guide to Information Technology Security CBS OPAG PWS WMO No. 834 Guide to Public Weather Services Practices CBS /IMOP WMO No. 8 Guide to Instruments and Methods of Observation OTHER Other Guidance Material - Technical Documents - Miscellaneous Publications