Version 3.1.1 of the WRF Pre-Processing System (WPS) was released on July 31, 2009.

WPS Version 3.1.1

New features and bug fixes

• Added configuration option for ifort compiler on Intel-based Macs
• Fix to allow ungrib to be compiled on systems with case-insensitive filesystems
• Added support for NavySST GRIB data
• Added Vtables for ARW output in GRIB format (thanks to Tanya Smirnova)