Snow & Flow Summary for many of Idaho’s whitewater rivers. Current snow, water supply forecasts, analog snow years, and runoff examples for these years. Example runoff years used, illustrate a early to normal snow melt and a late melt that had a wet spring (2010). Also included, is bonus sneak peak at next winter, the year after a strong El Nino year like this year. Here’s an updated March weather slide from Cliff Mass Blog that shows high pressure is likely to move into the West March 13-20. This may start the lower elevation rivers to flow depending on air temperature levels.