Historical Annual Runoff
Click here to download a PDF of the Historical Annual Colorado River Runoff diagram
- Annual totals by water year (Oct 1 – Sep 30).
- Most recent water year data may be provisional.
- Years with incomplete gauge data have been omitted.
- Annual runoff totals are in units of 1000 Acre-Feet.
Graphs are interactive, hovering over data will show the runoff values.
Colorado Water Supply Outlook
The Natural Resource Conservation Service water supply outlook, as of May 1, 2020, contains the following estimates of runoff for the April through July 2020 period at the following gauges (Note: Not all gauges shown for historical runoff are forecasted, in which case a representative gauge from the outlook report was chosen):
|Division||River||April - July Forecasted Runoff (1000 AF)||% of 30 yr avg|
|1||South Platte River at South Platte*||200||88%|
|2||Arkansas River at Pueblo Reservoir Inflow*||350||77%|
|3||Rio Grande River near Del Norte*||320||62%|
|4||Gunnison River near Grand Junction||785||53%|
|5||Colorado River near Dotsero||1,400||100%|
|6||Yampa River near Maybell||920||98%|
|7||Animas River at Durango||255||62%|