Sea-level pressure, SST, latent and sensible heat fluxes, large-scale and convective precipitation, specific humidity and temperatures at 850 hPa, and winds at both 925 and 300 hPa from the AFES simulations. In addition to a control simulation with realistic SST, there is one simulation each with strongly smoothed SSTs in either the Gulf Stream or Kuroshio Extension region. All simulations cover the time period 1982-2000.