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These graphics represent the general probabilities of exceeding minor, moderate, and major flood levels based on ensemble streamflow prediction analysis. The long-range probabilistic outlook contains forecast values that are calculated using multiple season scenarios from 30 or more years of climatological data including current conditions of the river, snow cover, and soil moisture. Locations on the map colored in gray are not yet modeled in such a way to provide this information. Go to WFO AHPS pages to view more detailed probabilistic information for each river location.
Probabilities of exceeding Major Flood Levels
Probabilities of exceeding Moderate Flood Levels
Probabilities of exceeding Minor Flood Levels
