San Juan River Outlook

April precipitation was much below average. May 1 snowpack was approximately 20-30% of average below the snowpack that existed on April 1. Spring runoff forecasts have decreased approximately 10% since April 1 and now call for 40-65% of average volume.

April-July streamflow forecasts for the San Juan Basin are as follows:

San Juan River:
Much Below Average

Water Supply Outlook for the Upper Colorado - May, 2000
Colorado Basin River Forecast Center (
Last Modified: Thursday, 04-May-2000 23:00:46 UTC