Weekly Chance of Exceeding Levels Graphic

This graphic shows the probability or chance of the maximum stage, flow, or volume at a point on a river exceeding a particular value for consecutive 7-day periods in a 90-day interval. The vertical axis shows river stage or level measured in feet (ft) and the horizontal axis shows time. An individual multi-color vertical bar represents the exceedance probabilities for a 7-day period, each color representing a range of probability as defined in the key to the right of the graph. A sample graphic is provided below. Click here to view the most recently generated Weekly Chance of Exceeding Levels product for the Iroquois River at Iroquois.