The 24-Month Study projects future Colorado River system conditions using single-trace hydrologic scenarios simulated with the Colorado River Mid-term Modeling System (CRMMS) in 24-Month Study Mode. The Most Probable and Probable Minimum 24-Month Studies are released monthly, typically by the 15th day of the month. The Probable Maximum 24-Month Study is released alongside other 24-Month Studies in January, April, August, and October. | www.usbr.gov