CFSv2 Seasonal SSTs (clim19912020)
first  rec: avg(lastbs-1, lastobs, CFSv2 month 1)
second rec: avg(lastbs, cfs month 1, CFSv2 month 2)
last   rec: CFSv2 month 9
other  rec: CFSv2 3-mo average
 TrgSeason    SST34
   202503    -0.20
   202504    -0.15
   202505    -0.17
   202506    -0.02
   202507     0.08
   202508     0.10
   202509     0.15
   202510     0.20
   202511     0.27
   202512     0.30