Warm ENSO anomalies with respect to neutral conditions, by season
1982-83, 1986-87, 1991-92, 1994-95, 1997-98, 2002-03
based on Dec-Jan Nino3.4 being greater than 0.99C


Mar-May(0)


Jun-Aug(0)


Sep-Nov(0)


Dec(0)-Feb(1)


Mar-May(1)