Forecasts for Hams Fork, Blacks Fork, and Flaming Gorge inflow are in the top five historical observed volumes.
The following conditions influenced this month's forecasts:

Precipitation:
Seasonal October through April precipitation was 130 percent of average in the Upper Green basin. April precipitation was 150 percent of average in the basin as a whole.

Snow:
May 1st snow water equivalent was 160 percent of average in the basin.
--- Upper Green basin snow water equivalent plot.

Streamflow:
April streamflow was near 100 percent of average.

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

Climate Forecasts:
Climate forecasts were not a factor because there is not a strong correlation between La Nina conditions and winter precipitation in the Upper Green basin.

Forecast Summary:
With the addition of much above average precipitation in April, the seasonal precipitation and snow water equivalent have increased since April 1 and are now much above average for the Upper Green. As a result of the current conditions, the April through July streamflow volume forecasts increased by approximately 10 to 20 percent from the April 1 forecasts. Current forecasts range between 108 and 179 percent of average with a median value of 139 percent. Forecasts for Hams Fork, Blacks Fork, and Flaming Gorge inflow are in the top five historical observed volumes.

The majority of these forecast volumes are in the top three or record of historical observed volumes.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through April precipitation was 135 percent of average in the Yampa/White basin. April precipitation was 160 percent of average in the basin as a whole.

Snow:
May 1st snow water equivalent was 165 percent of average in the basin.
--- Yampa basin snow water equivalent plot.

Streamflow:
April streamflow was near 120 percent of average.

Soil Moisture:
Modeled soil moisture states were near average heading into the winter for the Yampa, Little Snake,and White River basins.

Climate Forecasts:
Climate forecasts were not a factor in the forecasts because there is not a strong correlation between La Nina conditions and winter precipitation in the Yampa/White basin.

Forecast Summary:
With the addition of much above average precipitation in April, the seasonal precipitation and current snow water equivalent have increased since April 1 and are now much above average for the Yampa basin. It is also important to note that the majority of the snotel locations have record snow water equivlent for May 1. As a result of the current conditions, the April through July streamflow volume forecasts have increased by approximately 15 to 25 percent. Current forecasts range between 148 and 216 percent of average with a median value of 193 percent. The majority of these forecast volumes are in the top three or record of historical observed volumes.

Many of these forecast volumes are in the top five historical observed volumes.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through April precipitation was 160 percent of average in the Duchesne basin. April precipitation was 180 percent of average the basin as a whole; however, portions of the basin only received near average precipitation such as the headwaters of Ashley Creek, Big Brush Creek, and Whiterocks.

Snow:
May 1st snow water equivalent was 190 percent of average in the basin.
--- Duchesne basin snow water equivalent plot.

Streamflow:
April streamflow was 120 percent of average.

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

Climate Forecasts:
Climate forecasts were not a factor in the forecasts because there is not a strong correlation between La Nina conditions and winter precipitation in the Duchesne basin.

Forecast Summary:
Seasonal precipitation and current snow water equivalent have increased as a result of much above average April precipitation and still remain much above average. As a result of the current conditions, the majority of the April through July streamflow volume forecasts increased by approximately 15 to 20 percent. However, forecasts for Ashley Creek, Big Brush, and Whiterocks remained similiar to the April 1 forecasts due to near average precipitation. Current forecasts range between 108 and 227 percent of average with a median value of 181 percent. Many of these forecast volumes are in the top five historical observed volumes.

Many of these forecast volumes are in the top five historical observed volumes.
The following conditions influenced this month's forecasts:

Precipitation:
Seasonal October through April precipitation was 160 percent of average in the Lower Green basin. April precipitation was 180 percent of average.

Snow:
May 1st snow water equivalent was 160 percent of average in the basin as a whole.
--- Lower Green basin snow water equivalent plot.

Streamflow:
April streamflow was near 100 percent of average.

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

Climate Forecasts:
Climate forecasts were not a factor in the forecasts because there is not a strong correlation between La Nina conditions and winter precipitation in the Lower Green basin.

Forecast Summary:
Seasonal precipitation and current snow water equivalent have increased as a result of much above average April precipitation and still remain much above average. As a result of the current conditions, the April through July streamflow volume forecasts have increased by approximately 15 to 20 percent from the April 1 forecasts. Current forecasts range between 151 and 190 percent of average with a median value of 167 percent.

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).