>Well, There Ya Have It (OI.v2 SST Data Update Schedule)

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NOAA’s schedule for providing real-time OI.v2 SST data is described in their FAQ webpage:
http://www.emc.ncep.noaa.gov/research/cmb/sst_analysis/FAQ.html

They write:

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The real-time weekly fields run Sunday through Saturday and are generated early Monday morning. We have to wait until we can interpolate weekly fields to the last day of the month to generate a complete monthly field. Thus, the full monthly fields are updated according to the following schedule:

It is best to wait until late morning (US Eastern Time) to pick up new fields to give us time to ensure the analysis ran properly.
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So it appears I downloaded preliminary data on the first of last month and what I called a correction was really the official data.

In light of this, I will post preliminary Global and NINO3.4 SST anomaly data on or around the first of each month, then wait until the NOAA analysis is complete before posting my monthly updates.

Preliminary June 2009 Global SST Anomaly Data
http://i44.tinypic.com/2ppeviv.png
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Preliminary June 2009 NINO3.4 SST Anomaly Data

http://i44.tinypic.com/41cgh.png
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SOURCE

OI.v2 SST data are available through the NOAA NOMALDS system:
http://nomad3.ncep.noaa.gov/cgi-bin/pdisp_sst.sh?lite=