GSMaP RIKEN nowcast (GSMaP_RNC)
Global precipitation nowcast
About this page
The Data Assimilation Research Team (DA team) performs cutting-edge research on weather forecasting by integrating computer simulations and observation data. Based on an advanced data assimilation technique, we developed a precipitation nowcasting system* that provides precipitation forecasts up to 8 hours ahead. Operation of the nowcast system involves hourly updates and accuracy verification, and results are used for research purposes.
This website provides precipitation forecasts 8 hours in advance using hourly-updated Global Satellite Mapping of Precipitation Near-Real-Time product (GSMaP_NRT) provided by JAXA. We acquired the weather forecasting license (License #204) from the Japan Meteorological Agency (JMA) for the area surrounding Japan defined by 0-60ºN and 100-180ºE. Areas on the map shaded in gray indicate out-of-service locations.
Please note that the weather forecasts on this website can differ from weather forcasts provided by the JMA. Please give precedence to the latest warnings and advisories from the JMA.
Use of information or data from this website is undertaken at the user's own risk. RIKEN takes no responsibility for any direct or indirect damage that may arise through the use of this information or data. Any part or all of this website may be changed, deleted, or removed without notice.
All text, photographs, diagrams, and other materials on this website are copyrighted by RIKEN unless explicitly specified otherwise on the website. It is prohibited to use, reproduce, or modify any of the material without RIKEN's permission.
- Otsuka, S., S. Kotsuki, M. Ohhigashi, and T. Miyoshi, 2019: GSMaP RIKEN Nowcast: Global precipitation nowcasting with data assimilation. J. Meteor. Soc. Japan, 97, 1099-1117.
- Otsuka, S., S. Kotsuki, and T. Miyoshi, 2016: Nowcasting with data assimilation: a case of Global Satellite Mapping of Precipitation. Wea. Forecasting, 31, 1409-1416.