NOAA’s Meteorological Development Laboratory offers degrib, a multi-platform application that downloads many different kinds of US Weather Service forecast data (e.g. temperature, precipitation, wind, etc.) from the National Digital Forecast Database. Data is available for every 3 hours for the next 72 hours, every 6 hours for the next 7 days. Degrib also converts the data into GIS formats: shapefile, CSV, NetCDF and binary float (.flt) format. Data is also available via WFS, XML, and in a graphic web browser format.
Via The Earth Is Square, which has screenshots and more