Extended Streamflow Prediction
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520
FGUS65 KSTR 042103
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH


                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                            April 4, 2017


PRECIPITATION AND SNOWPACK (% OF AVERAGE):

SUBBASIN                    MAR      OCT-MAR     APR 1       MAR
                          PRECIP     PRECIP      SNOW        FLOW
----------------------    ------     -------     -----     --------
GREEN ABV FLAMING GORGE     145        175        160         375
BEAR RIVER HEADWATERS       125        170        145         265

RESERVOIR STORAGE (KAF) AS OF MARCH 31, 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     MAR 31        Usable
                          Storage  Average  Capacity   Storage  Average  Avg Storage   Capacity
------------------------------------------------------------------------------------------------
   GREEN - FONTENELLE RE|    206.8|    170|     60| 139.5|    115|      121.7|344.8|
   BIG SANDY - BIG SANDY|     30.5|    156|     80|  21.9|    111|       19.6| 38.3|
   BLACKS FORK - MEEKS C|     15.8|    118|     53|   9.5|     71|       13.4| 29.9|
   EF SMITHS FORK - STAT|      7.4|    135|     54|   6.6|    120|        5.5| 13.9|
   GREEN - FLAMING GORGE|   3169.4|    105|     85|3165.0|    105|     3021.3|    3749.0|


STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    430   176    480    460    400    380    245
Pine Ck
  Fremont Lk, abv          Apr-Jul    148   151    166    159    143    133     98
New Fork River
  Big Piney, nr            Apr-Jul    660   186    770    720    600    560    355
Green River
  Fontenelle Res, Fontene  Apr-Jul   1680   232   1920   1780   1500   1390    725
Big Sandy River
  Farson, nr               Apr-Jul     86   165    104     95     81     72     52
Green River
  Green River, Wy, nr      Apr-Jul   1730   237   2000   1860   1530   1410    730
EF Smiths Fork River
  Stateline Res, Robertso  Apr-Jul     37   142     44     40     33     30     26
Blacks Fork River
  Robertson, nr            Apr-Jul    122   137    151    136    113    103     89
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul    108   200    132    121     95     90     54
  Viva Naughton Res        Apr-Jul    162   219    200    182    143    132     74
Green River
  Flaming Gorge Res, Flam  Apr-Jul   2260   231   2670   2500   1930   1840    980
Little Snake River
  Slater, nr               Apr-Jul    145    93    190    160    131    103    156
  Dixon, nr                Apr-Jul    290    84    410    330    260    200    345

BEAR RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul    175   156    205    193    165    150    112
  Woodruff Narrows Rsvr,   Apr-Jul    220   182    295    260    200    187    121
  Montpelier, nr, Stewart  Apr-Jul    600   330    760    680    575    530    182
Smiths Fork River
  Border, nr               Apr-Jul    163   183    190    176    155    145     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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