The following conditions influenced this month's forecasts:

Precipitation:
Seasonal October through May precipitation was near 90 percent of average in the Upper Colorado mainstem basin. May precipitation was also near 90 percent of average.

Snow:
June 1st snow water equivalent was near 55 percent of average in the basin as a whole. The majority of the remaining snow is above 10,000 feet. The snow peaked in May at 85% of the average seasonal peak.
--- Upper Colorado basin snow water equivalent plot

Streamflow:
May streamflow was near 80 percent of average.

Soil Moisture:
Modeled soil moisture states were near average heading into the winter.

Forecast Summary:
Basin wide precipitation was near average for the month of May. However, some headwater areas received greater amounts of precipitation. June through July streamflow volume forecasts range from 43 to 85 percent of average,with a median value of 69%. April through July streamflow volume forecasts remained the same or increased slightly in certain headwater areas. The Upper Colorado basin April through July streamflow volume forecasts now range from 58 to 85 percent of average, with a median value of 72%.

The following conditions influenced this month's forecasts:

Precipitation:
Seasonal October through May precipitation was 95 percent of average in the Gunnison Basin. May precipitation was 60 percent of average.

Snow:
June 1st snow water equivalent was 35 percent of average in the Gunnison Basin. There is still some snow above 11,500 feet with minimal areal extent. The snow peaked above Blue Mesa in early April around 95 percent of the seasonal average.
--- Gunnison basin snow water equivalent plot

Streamflow:
May streamflow was 70 percent of average.

Soil Moisture:
Modeled soil moisture states were below average heading into the winter.

Forecast Summary:
May precipitation was much below average in the Gunnison Basin, as were the monthly streamflow volumes. Also, June 1st snow water equivalent for the Gunnison dropped to 35 percent below average. June through July volume forecasts range from 56 to 69 percent of average, with a median value of 62%. This resulted in a 5 percent decrease to the April through July volume forecasts. The Gunnison Basin April through July forecasts now range between 66 and 86 percent of average, with a median value of 74%.

The following conditions influenced this month's forecasts:

Precipitation:
Seasonal October through May precipitation was 100 percent of average in the entire Dolores Basin. May precipitation was 45 percent of average.

Snow:
June 1st snow water equivalent was 0 percent of average in the Dolores Basin. However, there is still enough snow above 11,500 feet with minimal areal extent for some runoff into June. The snow peaked in early April at about 110 percent of the seasonal average.
--- Dolores basin snow water equivalent plot

Streamflow:
May streamflow was 70 percent of average.

Soil Moisture:
Modeled soil moisture states were below to much below average heading into the winter.

Forecast Summary:
May precipitation was much below average in the Dolores Basin. In addition, the May 1st snow water equivalent was below average at 0%, but still some snow was left above 11,500 feet for runoff into June. June through July volume forecasts range from 30 to 53 percent of average, with a median value of 34%. This resulted in about a 5% decrease in the April through July forecast volumes. The Dolores Basin April through July forecasts now range between 67 and 72 percent of average, with a median value of 69%.

Differences between the full period forecasts and the residual forecasts may not exactly equal the actual observed volumes due to rounding conventions (see Definitions section).