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Key - Current River Flow:
Each point on the map above represents a stream gauge maintained by the United States Geological Survey (USGS). The color shows how each river's flow, measured in cubic feet per second, compares to the historic flow on this day of the year. Most stations are updated hourly. More data and graphics can be found at USGS WaterWatch.
  • = Extremely high
  • = Far above normal - above the 90th percentile
  • = Above normal - 76th to 90th percentile
  • = Normal - 25th to 75th percentile
  • = Below normal - 10th to 24th percentile
  • = Much below normal - below 10th percentile
  • = Extremely low
  • = Not ranked (insufficient data)
How does climate change affect floods and droughts?
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