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
   201110   -.853619
   201111   -.985208
   201112  -1.135132
   201201  -1.186829
   201202  -1.063110
   201203   -.910492
   201204   -.815582
   201205   -.785217
   201206   -.844849