CFSv2 Seasonal SSTs (clim19822010)
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
   202204    -0.98
   202205    -0.98
   202205    -0.98
   202206    -0.85
   202207    -0.71
   202208    -0.66
   202209    -0.73
   202210    -0.81
   202211    -0.82
   202212    -0.72
   202301    -0.54