Extended Streamflow Prediction
Issued by NWS

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000
FGUS65 KSTR 051943
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH

                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                             June 5, 2019


PRECIPITATION(% OF AVERAGE):

SUBBASIN                   MAY       OCT-MAY    MAY
                          PRECIP     PRECIP     FLOW
----------------------    ------     -------    ----
GREEN ABV FLAMING GORGE     170        115      105
BEAR RIVER HEADWATERS       160        120       85

RESERVOIR STORAGE (KAF) AS OF MAY 31, 2019
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|      344.8|       204.1|     59||      260.4|        76|
   BIG SANDY - BIG SANDY|       38.3|        29.2|     76||       38.5|       101|
   BLACKS FORK - MEEKS C|       29.9|        22.5|     75||       30.2|       101|
   EF SMITHS FORK - STAT|       13.9|         9.4|     68||       14.0|       101|
   GREEN - FLAMING GORGE|     3749.0|      3376.5|     90||     3294.2|        88|
   BEAR - WOODRUFF NARRO|       55.8|        49.9|     90||       51.0|        91|

STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    205    84    245    215    183    173    245
  Daniel, nr, Warren Brid  Jun-Jul    152    90    192    161    130    120    168
Pine Ck
  Fremont Lk, abv          Apr-Jul     95    97    110    100     91     84     98
  Fremont Lk, abv          Jun-Jul     81   107     96     86     77     70     76
New Fork River
  Big Piney, nr            Apr-Jul    360   101    435    410    330    315    355
  Big Piney, nr            Jun-Jul    265   104    340    315    235    220    255
Green River
  Fontenelle Reservoir, F  Apr-Jul    780   108    910    835    735    690    725
  Fontenelle Reservoir, F  Jun-Jul    500   105    630    555    455    410    475
Big Sandy River
  Farson, nr               Apr-Jul     55   106     66     60     49     45     52
  Farson, nr               Jun-Jul     38   112     49     43     32     28     34
Green River
  Green River, Wy, nr      Apr-Jul    775   106    925    835    730    690    730
  Green River, Wy, nr      Jun-Jul    505   105    655    565    460    420    480
EF Smiths Fork River
  Stateline Reservoir, Ro  Apr-Jul     34   131     38     36     32     31     26
  Stateline Reservoir, Ro  Jun-Jul     25   140     29     27     23     22   17.8
Blacks Fork River
  Robertson, nr            Apr-Jul    103   116    116    105     97     91     89
  Robertson, nr            Jun-Jul     78   132     91     80     72     66     59
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul     47    87     59     50     44     40     54
  Frontier, nr, Pole Ck,   Jun-Jul     26   100     38     29   23.0   19.0     26
  Viva Naughton Reservoir  Apr-Jul     64    86     78     67     59     55     74
  Viva Naughton Reservoir  Jun-Jul     31   100     45     34     26     22     31
Green River
  Flaming Gorge Reservoir  Apr-Jul   1170   119   1360   1230   1090   1020    980
  Flaming Gorge Reservoir  Jun-Jul    675   112    870    735    595    530    600
Little Snake River
  Slater, nr               Apr-Jul    164   105    192    171    151    145    156
  Slater, nr               Jun-Jul     79   120    107     86     66     60     66
  Dixon, nr                Apr-Jul    365   106    405    375    345    325    345
  Dixon, nr                Jun-Jul    170   126    210    181    149    130    135

Bear River Basin
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul    140   125    152    145    138    126    112
  Utah-Wyoming State Line  Jun-Jul     97   147    109    102     95     83     66
  Woodruff Narrows Rsvr,   Apr-Jul    146   121    158    150    142    127    121
  Woodruff Narrows Rsvr,   Jun-Jul     79   139     91     83     75     60     57
  Montpelier, nr, Stewart  Apr-Jul    163    90    200    169    160    137    182
  Montpelier, nr, Stewart  Jun-Jul     77    85    114     83     74     51     91
Smiths Fork River
  Border, nr               Apr-Jul     84    94     92     87     83     77     89
  Border, nr               Jun-Jul     51   102     59     54     50     44     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,Kormos


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