cbrfc 2013 runoff recap · cbrfc 2013 runoff recap: upper green . august 22, 2013 . ashley nielson...

CBRFC 2013 Runoff Recap:

Upper Green

August 22, 2013 Ashley Nielson

NWS Colorado Basin River Forecast Center

Outline

2013 Conditions Recap -Precipitation/Temperature -Snow -Streamflow

April-July Forecast Performance Future forecasts (water supply and climate)

PRECIPITATION

4

PRECIPITATION

5

Monthly Max Temperature Deviation

April May June

6

SNOW: Upper Green

Peak 4/24

75% Median

2013 1992 2010 2007

7

April 1 May 1

June 1 July 1

SNOW: Melt Progression

8

STREAMFLOW: Green River

April-July Water Supply: Warren Bridge

9

10%

50%

90%

Observed Daily Volumes

April-July 159 KAF 65%

April-July Water Supply: Fontenelle

10

10%

50%

90%

Observed Daily Volumes

April-July 317 KAF 44%

Climate Forecasts

11

ENSO FORECAST : WY 2014 = Neutral Conditions

Water Supply Forecasts: 8/19

12

August September October

30 KAF 39%

25 KAF 55%

30 KAF 62%

Fontenelle Inflow

Below average flows forecasted

Feedback, Questions, Concerns always welcome….

Ashley Nielson

CBRFC Hydrologist

Phone: 801.524.5130 ext 333 Email: ashley.nielson@noaa.gov