
Severe storms and flooding across the Great Plains have disrupted barge traffic on most inland waterways for two weeks. Traffic through St. Louis was fully stopped as of May 30 with the gauge at 42.4 feet, and the forecast shows levels not dropping below 38 feet until mid-June.
Barge traffic is suspended on the lower Illinois and much of the Arkansas rivers.
Prolonged closures on the core grain export corridor raise freight costs and delay shipments to Gulf ports, supporting basis and transport prices. Delayed export loadings can also pressure cash grain prices in the interior.
Not enough comparable past events yet for a historical read.
After 285 past bullish logistics events, Corn moved a median +0.1% over 5 sessions (52% higher; middle half -1.5% to +1.5%), and +0.8% over 20.
After 206 past bullish logistics events, Soybeans moved a median +0.5% over 5 sessions (56% higher; middle half -1.3% to +2.6%), and +1.4% 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.