Pilot Pete,
You’re looking for a decode of the eight figure group appended to METAR reports. This is different from SNOTAM form CA1272 and uses different fields.
Try this link to an MS Word doc.
http://www.safe-flight.net/snotam-english.doc
Regards,
Xacto.
[ 19 November 2001: Message edited by: Xacto ]