La Niña events are not infrequent and should provide some level of predictability. However, there is wide variability in each event, seed genetics consistently improve and so does crop forecasting capability. In the past three La Niña years between USDA’s December WASDE forecast for South American corn production and its June WASDE estimate, it has lowered its estimate for Argentine corn production two times and raised it once. Over that same period, USDA has also lowered its estimate for Brazilian corn production twice and raised it once, but not in the same years as the corresponding changes in Argentine production. In the 2015/16 La Niña, it lowered Brazilian production but raised Argentine output. In the 2011...