Extended Streamflow Prediction
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833
FGUS65 KSTR 031738
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH


                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                            MARCH 3, 2017


PRECIPITATION AND SNOWPACK (% OF AVERAGE):

SUBBASIN                    FEB      OCT-FEB     MAR 1       FEB
                          PRECIP     PRECIP      SNOW        FLOW
----------------------    ------     -------     -----     --------
GREEN ABV FLAMING GORGE     225        180        180         215
BEAR RIVER HEADWATERS       225        180        170         125

RESERVOIR STORAGE (KAF) AS OF FEBRUARY 28, 2017
Figures are in 1000 Acre Feet
                            C U R R E N T   Y R         L A S T   Y R    1981-2010
                          EOM      % of     % of       EOM      % of     FEB 28        Usable
                          Storage  Average  Capacity   Storage  Average  Avg Storage   Capacity
------------------------------------------------------------------------------------------------
   GREEN - FONTENELLE RE|    177.6|    139|     52|148.6|    116|      127.6|     344.8|
   BIG SANDY - BIG SANDY|     24.7|    164|     65| 20.4|    135|       15.1|38.3|
   BLACKS FORK - MEEKS C|     12.5|    101|     42|  8.1|     66|       12.3|29.9|
   EF SMITHS FORK - STAT|      6.6|    123|     48|  6.2|    116|        5.4|13.9|
   GREEN - FLAMING GORGE|   3088.1|    102|     82|    3127.5|    104|     3015.6|    3749.0|

STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    440   180    500    465    425    385    245
Pine Ck
  Fremont Lk, abv          Apr-Jul    143   146    160    148    130    124     98
New Fork River
  Big Piney, nr            Apr-Jul    645   182    775    700    610    550    355
Green River
  Fontenelle Res, Fontene  Apr-Jul   1680   232   2020   1830   1500   1390    725
Big Sandy River
  Farson, nr               Apr-Jul     86   165    109     92     82     68     52
Green River
  Green River, Wy, nr      Apr-Jul   1730   237   2100   1900   1560   1410    730
EF Smiths Fork River
  Stateline Res, Robertso  Apr-Jul     36   138     45     40     33     29     26
Blacks Fork River
  Robertson, nr            Apr-Jul    119   134    158    137    106     99     89
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul    108   200    134    119     96     88     54
  Viva Naughton Res        Apr-Jul    156   211    200    175    140    127     74
Green River
  Flaming Gorge Res, Flam  Apr-Jul   2260   231   2850   2480   1970   1840    980
Little Snake River
  Slater, nr               Apr-Jul    185   119    250    205    167    134    156
  Dixon, nr                Apr-Jul    400   116    570    445    355    280    345

BEAR RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul    176   157    205    189    163    149    112
  Woodruff Narrows Rsvr,   Apr-Jul    215   178    300    245    190    160    121
  Montpelier, nr, Stewart  Apr-Jul    555   305    730    630    510    440    182
Smiths Fork River
  Border, nr               Apr-Jul    171   192    199    179    155    144     89


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




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