The information in this WMO CAeM Pilot Project on Aviation-weather Disaster Risk Reduction (ADRR) website is based on official warnings issued by the following National Meteorological and Hydrological Services (NMHSs) in RA II and RA V: China; Hong Kong, China; India; Japan; and the Philippines, as well as advisories and forecasts issued by the Tropical Cyclone Advisory Centre (TCAC) New Delhi and Tokyo, Joint Typhoon Warning Centre (JTWC) of the USA, European Centre for Medium-Range Weather Forecasts (ECMWF).
 
Information presented in the warnings, advisories and forecasts issued by the various centres may differ owing to differences in the availability of observational data, operational cutoff times, numerical weather prediction models as well as professional judgement.