Essential Weather Maps
Surface and Upper-level Weather Maps:
Upper-level Observation Plots (pdf format):
King's Park Sounding Data:
Numerical Weather Forecasts:
Surface and Upper-level Maps
Hong Kong Observatory
Korean Meteorological Administration
Surface Observations for East Asia
Steering Flow for East Asia
Global Upper-level Maps
Global Upper-level Data
Meteogram for Global Stations

Numerical Weather Prediction Maps
European Centre for Medium-range Weather Forecast (ECMWF)
Fleet Numerical Meteorology and Oceanology Center (FNMOC)
Global Forecast System (GFS) Asia Forecast
US Weather Underground ECMWF/GFS Forecast
Numerical Forecast Maps by Tropical Tidbits
GFS Wind Field Forecast by Earth
Hong Kong Observatory
Japan Meteorological Agency
Bureau of Meteorology, Australia
Comparison of Medium-Range Forecast Models

Satellite Images
RAMMB Himawari-8 Images
NICT Himawari-8 Images
JMA Himawari-8 Images
Western Pacific
South China Sea
Japan Meteorological Agency
Central Weather Bureau, Taiwan
NRL (access via proxy)
Joint Typhoon Warning Center (access via proxy)
Polar Satellite Image for South China Sea
Satellite Image Database
Global Satellite Image

Radar Images
Hong Kong Observatory
Guangzhou and Shenzhen (in Chinese)
Zhuhai (in Chinese)
Guangdong Composite (in Chinese)
Central Weather Bureau, Taiwan
Hong Kong Observatory Radar Archive