Extended Streamflow Prediction
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10
000
FGUS65 KSTR 041329
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH

                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                             JUNE 3, 2021


PRECIPITATION(% OF AVERAGE) AND SNOWPACK (% OF MEDIAN):

SUBBASIN                    MAY      OCT-MAY
                          PRECIP     PRECIP
----------------------    ------     -------
GREEN ABV FLAMING GORGE      95         85
BEAR RIVER HEADWATERS        65         70

RESERVOIR STORAGE (KAF) AS OF MAY 31, 2021
Figures are in 1000 Acre Feet
                              C U R R E N T   Y R              L A S T   Y R
                           Usable     EOM Usable % of       EOM Usable   % of
                           Capacity   Contents   Capacity   Contents     Capacity
----------------------------------------------------------------------------------
   GREEN - FONTENELLE RE|      334.0|       151.6|     45|      203.5|        61|
   BIG SANDY - BIG SANDY|       38.3|        18.8|     49|       31.4|        82|
   BLACKS FORK - MEEKS C|       29.9|        16.6|     56|       28.1|        94|
   EF SMITHS FORK - STAT|       13.9|         8.3|     60|       14.3|       103|
   GREEN - FLAMING GORGE|     3749.0|      3148.8|     84|     3227.6|        86|

STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    169    69    210    184    158    142    245
  Daniel, nr, Warren Brid  Jun-Jul    117    70    158    132    106     90    168
Pine Ck
  Fremont Lk, abv          Apr-Jul     63    64     79     69     56     47     98
  Fremont Lk, abv          Jun-Jul     47    62     63     53     40     31     76
New Fork River
  Big Piney, nr            Apr-Jul    154    43    225    184    132    110    355
  Big Piney, nr            Jun-Jul    100    39    170    130     78     56    255
Green River
  Fontenelle Reservoir, F  Apr-Jul    345    48    480    400    305    265    725
  Fontenelle Reservoir, F  Jun-Jul    215    45    350    270    175    135    475
Big Sandy River
  Farson, nr               Apr-Jul     24    46     35     27   21.0   18.1     52
  Farson, nr               Jun-Jul   16.0    47     27     19   13.0   10.0     34
Green River
  Green River, Wy, nr      Apr-Jul    335    46    475    395    295    255    730
  Green River, Wy, nr      Jun-Jul    210    44    350    270    173    130    480
EF Smiths Fork River
  Stateline Reservoir, Ro  Apr-Jul   16.2    62     20     18   14.6   13.1     26
  Stateline Reservoir, Ro  Jun-Jul    8.1    46   12.0    9.4    6.5    5.0   17.8
Blacks Fork River
  Robertson, nr            Apr-Jul     48    54     62     53     44     40     89
  Robertson, nr            Jun-Jul     22    37     36     27   17.5   14.0     59
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul     26    48     34     29     24     22     54
  Frontier, nr, Pole Ck,   Jun-Jul   10.5    40   18.0   12.8    7.9    6.0     26
  Viva Naughton Reservoir  Apr-Jul     35    47     44     38     32     30     74
  Viva Naughton Reservoir  Jun-Jul   11.2    36     20     14    8.2    6.0     31
Green River
  Flaming Gorge Reservoir  Apr-Jul    395    40    555    460    350    305    980
  Flaming Gorge Reservoir  Jun-Jul    225    38    385    290    180    135    600
Little Snake River
  Slater, nr               Apr-Jul     71    46     85     77     66     61    156
  Slater, nr               Jun-Jul     24    36     38     30   18.5   14.0     66
  Dixon, nr                Apr-Jul     95    28    130    111     90     80    345
  Dixon, nr                Jun-Jul     30    22     65     46   25.0   15.0    135

BEAR RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul     55    49     63     56     48     42    112
  Utah-Wyoming State Line  Jun-Jul     27    41     35     28   20.0   14.0     66
  Woodruff Narrows Rsvr,   Apr-Jul     28    23     36     29   26.0   16.8    121
  Woodruff Narrows Rsvr,   Jun-Jul   12.4    22     20     13  10.40   0.80     57
  Montpelier, nr, Stewart  Apr-Jul     21    12     33     23   19.1   16.0    182
  Montpelier, nr, Stewart  Jun-Jul   13.1    14     25     15   11.2    8.1     91
Smiths Fork River
  Border, nr               Apr-Jul     44    49     54     46     40     34     89
  Border, nr               Jun-Jul     25    50     35     27   21.0   15.0     50

50% Most probable volume in 1000 acre-feet.
%AVG  Most probable volume in percent of the 1981-2010 average.
10% Volume that has a 10 percent chance of being exceeded.
30% Volume that has a 30 percent chance of being exceeded.
90% Volume that has a 90 percent chance of being exceeded.
70% Volume that has a 70 percent chance of being exceeded.
AVG   average volume for the 1981-2010 period.

All forecast volumes reflect natural flow.  Actual observed flow may
be affected by upstream water management.

CBRFC/Nielson/Bernard



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.