Where can Boeing wind data be found? There are various services that use world-wide Boeing Winds for forecast wind data which can be used to calculate an approximate flight time between two locations.  They usually have best case, worst case, and average case for each location, altitude, and date in the future.

I have searched and searched Google to no avail.  Where can this wind data be found, and how can it be used in a commercial product?

For those of you who don't know what the Boeing winds are, I found this description of their software product on am informal message board (not related to Boeing):


  PC WindTemp   
  
  INTRODUCTION 
  The Boeing PC Windtemp program provides global average and statistical winds and temperatures aloft over a 30 year
  period. These data are used primarily for comparative transport
  airplane performance and economic studies. The data may also be used
  for transport airplane route planning on an annual, seasonal, or
  monthly basis.  
  
  Note: Actual winds and temperatures at a specific location and time
  may differ appreciably from those computed by PC Windtemp. Therefore,
  data from PC Windtemp must not be used for flight planning, aircraft
  dispatch, airborne flight navigation, or any other type of actual
  flight operations.  
  
  PROGRAM FEATURES 
  A seasonal and monthly database with global coverage from 1000 millibars (364 feet pressure altitude) to 10
  millibars (101,885 feet pressure altitude). Annual data updates to the
  most recent 30 year period. Airport codes and coordinates may be
  imported from a text file in a comma separated value (CSV)
  format Calculates enroute wind and temperature for up to 50 airport
  pairs at a time. Calculates enroute wind and temperature for simple
  great circle tracks or tracks with up to 250 waypoints, with or
  without altitude changes. Calculates average enroute wind and
  temperature or any reliability (quantile) between 50% and 99%. Months
  or seasons, reliabilities, altitudes, and speeds may be nested for
  input efficiency. Formatted and text output reports are
  available. Program subroutines (DLLs) can be called from other
  programs written with C++ or Visual Basic in order to incorporate
  Windtemp functionality in those programs.
An alternative to the Boeing data (if it exists, you might need to call one of their sales reps to find it) is publicly available meteorological data.  One such project is the NCEP/NCAR Reanalysis Project.  There are a few others, as well as archived data.  None of these is exactly the Boeing dataset, but I'd bet that the Boeing dataset is based at least in part upon data like these.  The benefit to the data below is that in most cases it is free and there is a lot of it.  

Reanalysis Data

Reanalysis data is constructed from the best available past observations, which are assimilated into a weather model to fill in the gaps between obs and in time.  There are many such projects with various scales (global, regional) and time periods.

The NCEP/NCAR Reanalysis Project

This dataset has 4-times-daily, daily and monthly values between 1948 and present and long term monthly means for 1981-2010.  The data is global. The data is publicly available and you can retrieve files in NetCDF format from the linked website.  The wind data is stored on pressure levels (e.g. 1000 mb, 500 mb, 250 mb) and is stored in its u (east-west) and v (north-south) components separately.  

The ERA40

This dataset is a global dataset covering 1957-2002 and has various output resolutions available.  Output from ECMWF is typically in the GRIB format and not all of it is free for non-research use.

The NARR

The North American Regional Reanalysis, as the name suggests, is a regional dataset covering North America.  The data covers 1979 - present.

Observations

Long term past observations are archived at the NCDC and include surface stations, weather balloons and model data, among others.  From the various models available a statistical representation of winds could feasibly be produced.