Steve and Scott, I had several users (participating in the NAME experiment) notice the icorrect location of MMCN in the GEMPAK tables as being Santa Rosalia instead. MMCN is CIUDAD OBREGON according to the FAA: https://pilotweb.nas.faa.gov/qryhtml/icao/R59C1.html I also found the metar identified as MMCN here: http://www.ivao.org/db/ss/airport.asp?Id=MMCN A google search shows a lot of MMCN observations veing identified as Santa Rosalia, but don't know the source of that location- but it appears wrong. Steve