CFS PDFC Seasonal SSTs
1st rec: avg(lastbs-1, lastobs, cfs month 1)
2nd rec: avg(lastbs, cfs month 1, cfs month 2)
other records: CFS 3-mo average
 TrgSeason    SST34
   201201   -.834707
   201202   -.701465
   201203   -.577362
   201204   -.443634
   201205   -.260803
   201206   -.062134
   201207    .199005
   201208    .308075
   201209    .348511