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NOAA drought monitoring shows an unusually warm December and high evaporative demand have dried much of the southern and lower Mississippi basin, lowering river levels. December 2025 ranked as the 12th driest in 131 years of data in the lower basin, with the warmest-on-record conditions driving flash drought risk.
Northern reaches were near normal or wetter.
Below-median river levels constrain barge loading and raise freight costs on the system that moves a large share of US grain, which lowers interior prices relative to export values.
agrolatam.comAgroLatam U.S Editorial TeamJan 20, 2026Not 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, SOY 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.
