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You can find the original version of xmACIS at

An xmACIS2 training video is available for new users.

March 14, 2014: The ACIS priority scheme was adjusted to give the CF6 a higher priority than GHCN-Daily for the most recent 90 days.

December 23, 2013: A new mapping option was added to the Multi-Station products.

September 3, 2013: GHCN-Daily was made the highest priority dataset in ACIS to reflect the order of precedence established by the National Climatic Data Center. This could result in some values changing since a previous generation of the same ACIS product. More information concerning this change is available on the About ACIS web page. Continue to report erroneous values via Datzilla.