AbstractCorrelation coefficients are given with pressure, temperature, rain, ice and wind, and it is shown (a) that the Nile flood takes part in the southern oscillation as a member of the first group, (b) that equatorial temperatures are in inverse relation to the Nile flood, and (c) that the winter North Atlantic circulation varies inversely with the preceding Nile flood. St. Helena pressure has no contemporary relationship with the Nile flood. A formula is derived for prediction on June 1 with a joint coefficient of 0.72.