New 1981-2010 Averages being used this year. Note: This publication is currently undergoing major revisions. The current publication will be replaced with a new publication based on stakeholder requirements and scientific advances. We expect to begin sharing details on this soon. If you have input on content, format, or publication frequency at any time, please contact us at cbrfc.webmasters@noaa.gov.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through January precipitation was 100 percent of average
in the Upper Green basin. January precipitation was 125 percent of average.
Snow:
February 1st snow water equivalent was 100 percent of average in the basin.
--- Upper Green basin snow
water equivalent plot.
Streamflow:
January streamflow was near 110 percent of average.
Soil Moisture:
Modeled soil
moisture states indicated near average to above average soil moisture conditions
last fall prior to snow accumulation.
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:
Seasonal precipitation in the Upper Green remains near average as a result of above average and much
above average precipitation in October, November, and January. Snow water equivalent has increased from below average on January 1
to near average due to the above average precipitation in January. It is also important to note that fall soil moisture
conditions were near to above average. As a result, current April through July streamflow volume forecasts increased by
15 to 20 percent and range between 74 and 100 percent of average with a median value of 94 percent.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through January precipitation was 70 percent of average
in the Yampa/White basin. January precipitation was near 60 percent of average.
Snow:
February 1st snow water equivalent was 65 percent of average in the basin.
--- Yampa basin snow
water equivalent plot.
Streamflow:
January streamflow ranged between 110 and 120 percent of average.
Soil Moisture:
Modeled soil
moisture states indicated above average to much above average soil moisture conditions
last fall prior to snow accumulation.
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:
January precipitation was much below average in the Yampa/White basins. As a result of much below average conditions for both
December and January, both seasonal precipitation and snow water equivalent are much below
average. It is also important to note that fall soil moisture conditions were
above to much above average. As a result of another below average month, current April through July streamflow volume
forecasts have decreased by 5 to 10 percent and now range between 62 and 79 percent of average with a median value of 70 percent.
Forecasts are slightly higher than current snow conditions might suggest due to wet antecedent conditions.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through January precipitation was 85 percent of average
in the Duchesne basin. January precipitation was 70 percent of average.
Snow:
February 1st snow water equivalent was 65 percent of average in the basin.
--- Duchesne basin snow
water equivalent plot.
Streamflow:
December streamflow was 115 percent of average.
Soil Moisture:
Modeled soil
moisture states indicated much above average soil moisture conditions
last fall prior to snow accumulation.
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 in the Duchesne is below average as a result of much below average and below
average conditions in December and January. Snow water equivalent is also much below average for the
majority of the basin. However, it is important to note that fall precipitation and soil moisture conditions were
much above average. Wet antecedent conditions are resulting in somewhat higher forecasts for the Whiterocks and Uinta river basins.
As a result, current April through July streamflow volume forecasts have decreased by 5 to 10 percent and
range between 54 and 93 percent of average with a median value of 69 percent. Forecasts are slightly higher than current snow conditions
might suggest due to wet antecedent conditions.
The following conditions influenced this month's forecasts:
Precipitation:
Seasonal October through January precipitation was 80 percent of average
in the Lower Green basin. January precipitation was 85 percent of average.
Snow:
February 1st snow water equivalent was 55 percent of average in the basin.
--- Lower Green basin snow
water equivalent plot.
Streamflow:
January streamflow ranged from 120 to 130 percent of average.
Soil Moisture:
Modeled soil
moisture states indicated near average to above average soil moisture conditions
last fall prior to snow accumulation.
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 is below average and snow water equivalent is much below average in the Lower Green due to
below average monthly precipitation in November, December, and January. It is also important to note the fall soil moisture
conditions were near to above average. As a result, current April through July streamflow
volume forecasts remain similar to January 1 and range between 56 and 75 percent of average with a median value of 65 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).