Extended Streamflow Prediction
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570
FGUS65 KSTR 051710
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH


                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                            May 5, 2015


PRECIPITATION AND SNOWPACK (% OF AVERAGE):

SUBBASIN                    APR      OCT-APR     MAY 1       APR
                          PRECIP     PRECIP      SNOW        FLOW
----------------------    ------     -------     -----     --------
GREEN ABV FLAMING GORGE      90         80         60          90
BEAR RIVER HEADWATERS        65         75         20          95

RESERVOIR STORAGE (KAF) AS OF April 30,2015
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     APR 30        Usable
                          Storage  Average  Capacity   Storage  Average  Avg Storage   Capacity
------------------------------------------------------------------------------------------------
   GREEN - FONTENELLE RE|    185.1|    148|     54|137.7|    110|     125.0|     344.8|
   BIG SANDY - BIG SANDY|     26.5|    124|     69| 14.7|     69|      21.3|      38.3|
   BLACKS FORK - MEEKS C|     30.5|    185|    102| 22.2|    135|      16.5|      29.9|
   EF SMITHS FORK - STAT|     11.8|    182|     85|  9.0|    139|       6.5|      13.9|
   GREEN - FLAMING GORGE|   3212.6|    106|     86|    2970.8|     98|    3040.4|    3749.0|


STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Green River
  Daniel, nr, Warren Bridge, at   Apr-Jul    182    74    215    146    245
  Daniel, nr, Warren Bridge, at   May-Jul    161    72    195    125    225
Pine Ck
  Fremont Lk, abv                 Apr-Jul     73    74     92     54     98
  Fremont Lk, abv                 May-Jul     69    72     88     50     96
New Fork River
  Big Piney, nr                   Apr-Jul    205    58    300    137    355
  Big Piney, nr                   May-Jul    185    56    280    117    330
Green River
  Fontenelle Res, Fontenelle nr   Apr-Jul    495    68    630    360    725
  Fontenelle Res, Fontenelle nr   May-Jul    410    64    545    275    640
Big Sandy River
  Farson, nr                      Apr-Jul     32    62     45     22     52
  Farson, nr                      May-Jul     28    58     41   18.3     48
Green River
  Green River, Wy, nr             Apr-Jul    475    65    620    340    730
  Green River, Wy, nr             May-Jul    395    62    540    260    640
EF Smiths Fork River
  Stateline Res, Robertson,nr     Apr-Jul   16.0    62   19.8   12.8     26
  Stateline Res, Robertson,nr     May-Jul   14.2    55   18.0   11.0     26
Blacks Fork River
  Robertson, nr                   Apr-Jul     50    56     65     40     89
  Robertson, nr                   May-Jul     42    49     57     32     85
Hams Fork River
  Frontier, nr, Pole Ck, blo      Apr-Jul     38    70     48     30     54
  Frontier, nr, Pole Ck, blo      May-Jul     25    52     35   17.0     48
  Viva Naughton Res               Apr-Jul     44    59     57     36     74
  Viva Naughton Res               May-Jul     29    47     42     21     62
Green River
  Flaming Gorge Res, Flaming Gor  Apr-Jul    570    58    740    430    980
  Flaming Gorge Res, Flaming Gor  May-Jul    460    54    630    320    845
Little Snake River
  Slater, nr                      Apr-Jul     86    55    109     71    156
  Slater, nr                      May-Jul     67    49     90     52    138
  Dixon, nr                       Apr-Jul    134    39    182    107    345
  Dixon, nr                       May-Jul    102    35    150     75    295

BEAR RIVER BASIN
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Bear River
  Utah-Wyoming State Line, nr     Apr-Jul     61    54     70     53    112
  Utah-Wyoming State Line, nr     May-Jul     51    49     60     43    104
  Woodruff Narrows Rsvr, abv      Apr-Jul     36    30     45     32    121
  Woodruff Narrows Rsvr, abv      May-Jul     31    30     40     27    105
  Montpelier, nr, Stewart Dam, b  Apr-Jul     58    32     80     51    182
  Montpelier, nr, Stewart Dam, b  May-Jul     49    34     71     42    145
Smiths Fork River
  Border, nr                      Apr-Jul     70    79     78     63     89
  Border, nr                      May-Jul     57    71     65     50     80


MP    Most probable volume in 1000 acre-feet.
MP%   Most probable volume in percent of the 1981-2010 average.
RMAX  Volume that has a 10 percent chance of being exceeded.
RMIN  Volume that has a 90 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,Miller




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