The University of Florida AgroClimate project notes that NOAA issued a La Niña Watch on October 9, 2017, with about a 60% chance of development this fall. It describes typical La Niña effects on Florida and the Southeast, including warmer, drier winters and higher hurricane activity.
Impacts on Florida and Southeast crops are regional and mostly affect specialty vegetables and forage, with limited effect on major feed grain balance sheets. The story is a general climate outlook rather than a supply event.
After 2,467 past weather events, Corn moved a median +0.1% over 5 sessions (51% higher; middle half -1.5% to +1.7%), and +0.6% over 20.
After 1,964 past weather events, Soybeans moved a median +0.1% over 5 sessions (51% higher; middle half -1.7% to +1.8%), and +0.3% over 20.
After 1,773 past weather events, Wheat (SRW) moved a median +0.1% over 5 sessions (52% higher; middle half -1.5% to +2.1%), and +0.2% over 20.
After 361 past weather events, Palm Oil moved a median +0.0% over 5 sessions (51% higher; middle half -1.3% to +1.3%), and -0.2% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.