Climate Forecast System Reanalysis (CFSR) now available at Climate Wikience! The data are imported from NCDC NOAA 
The temporal resolution of data is 1 hr while the spatial resolution is T382 Gaussian grid. Climate Wikience delivers regular latitude-longitude global grid with 0.25 deg x 0.25 deg resolution using bicubic interpolation.
CFSR does not direclty deliver wind speed, but eastward (u) and northward (v) wind speed vectors. The wind speed is calculated by Climate Wikience as square_root (u^2 + v^2).
Below is the CFSR wind speed at 10 meters above surface on the 28th of August, 2005. The hurricane Katrina was near its peak strength on that date. The isolines are contoured every 1 m/s (meters per second).
The zoom onto hurricane Katrina