Archived Weather Data

There are times that we just need to take a quick look at some historic weather data in an aircraft crash incident and it is good to take a look at some web sites. One of the better sites to get weather maps is this free site http://www.hpc.ncep.noaa.gov/dailywxmap/ which contains maps for the US and Cananda. Another site is this http://www.ncdc.noaa.gov/oa/ncdc.html which is the NCDC, National Climatic Data Center. Which has some free data and others on a fee basis. However I must warn you that this site is not very user friendly.