
Livestock Wx described the derecho that crossed Iowa about a week and a half earlier, which caused widespread damage to corn crops. It also explained how derechos are defined and noted that La Niña odds are shaping the September to November outlook.
Iowa corn losses from the derecho reduce US corn supply and support corn prices, while the La Niña outlook adds further weather risk for the coming season.
After 1,465 past bullish weather events, Corn moved a median +0.2% over 5 sessions (54% higher; middle half -1.4% to +1.9%), and +0.9% over 20.
After 20 past neutral weather events, Live Cattle moved a median +0.4% over 5 sessions (60% higher; middle half -0.3% to +1.2%), and +3.0% 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.