
Persistent dry conditions across the Midwest pushed the Mississippi at Chester, Illinois below five feet, well under the April average. The Corps deployed dustpan dredges to keep the nine-foot channel open, and barge operators have cut loads to avoid grounding.
Reduced barge drafts raise per-tonne freight costs and slow grain movement from Illinois and Missouri. Weaker Gulf-bound flows can widen interior basis and pressure cash corn and soybean prices.
Not enough comparable past events yet for a historical read.
After 357 past bearish weather events, Corn moved a median -0.3% over 5 sessions (44% higher; middle half -2.2% to +1.3%), and -0.5% over 20.
After 363 past bearish weather events, Soybeans moved a median -0.6% over 5 sessions (42% higher; middle half -2.5% to +1.1%), 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.