Merge branch 'doc/hpc_tiers' of github.com:davidhuber-noaa/global-wor…

…kflow into doc/hpc_tiers

README.md

@@ -6,7 +6,7 @@
 ![Custom badge](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/emcbot/e35aa2904a54deae6bbb1fdc2d960c71/raw/hercules.json)
 ![Custom badge](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/emcbot/e35aa2904a54deae6bbb1fdc2d960c71/raw/wcoss2.json)
 
-The Global Workflow supporting the Global Forecast System (GFS) and the Global Ensemble Forecasting System (GEFS) with the [UFS-weather-model](https://github.com/ufs-community/ufs-weather-model).  Data assimilation, currently only available for the GFS, is provided by both the [GSI](https://github.com/NOAA-EMC/GSI)- and [GDASApp (JEDI)](https://github.com/NOAA-EMC/GDASApp)-based Data Assimilation systems.
+The Global Workflow supporting the Global Forecast System (GFS), the Global Ensemble Forecasting System (GEFS), and the Seasonal Forecast System (SFS) with the [UFS-weather-model](https://github.com/ufs-community/ufs-weather-model).  Data assimilation, currently only available for the GFS, is provides by both the [GSI](https://github.com/NOAA-EMC/GSI)- and [GDASApp (JEDI)](https://github.com/NOAA-EMC/GDASApp)-based Data Assimilation systems.
 
 In progress [documentation](https://global-workflow.readthedocs.io/en/latest/) is available.