Extended Streamflow Prediction
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000
FGUS65 KSTR 132308
ESPWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH


                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF
                              FEBRUARY 13, 2018


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

SUBBASIN                    JAN      OCT-JAN     FEB 13
                          PRECIP     PRECIP      SNOW
----------------------    ------     -------     -----
GREEN ABV FLAMING GORGE      85         90        105
BEAR RIVER HEADWATERS        75         80         70

RESERVOIR STORAGE (KAF) AS OF JANUARY  31, 2018
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|       165.2|     48|184.2|        53|
   BIG SANDY - BIG SANDY|       38.3|        30.8|     80| 23.5|        61|
   BLACKS FORK - MEEKS C|       29.9|        10.0|     34| 11.2|        38|
   EF SMITHS FORK - STAT|       13.9|         6.0|     43|  6.4|        46|
   GREEN - FLAMING GORGE|     3749.0|      3259.2|     87|     3087.3|        82|



Most Recent April-July Runoff Forecasts for the Green and Bear River Basins:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    275   112    360    300    240    205    245
Pine Ck
  Fremont Lk, abv          Apr-Jul    100   102    121    104     88     77     98
New Fork River
  Big Piney, nr            Apr-Jul    355   100    485    405    305    250    355
Green River
  Fontenelle Res, Fontene  Apr-Jul    750   103   1100    870    670    530    725
Big Sandy River
  Farson, nr               Apr-Jul     50    96     73     57     45     34     52
Green River
  Green River, Wy, nr      Apr-Jul    750   103   1120    885    680    540    730
EF Smiths Fork River
  Stateline Res, Robertso  Apr-Jul     21    81     31     25   18.2   15.7     26
Blacks Fork River
  Robertson, nr            Apr-Jul     70    79    112     84     61     49     89
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul     36    67     64     44     29     24     54
  Viva Naughton Res        Apr-Jul     45    61     90     56     35     28     74
Green River
  Flaming Gorge Res, Flam  Apr-Jul    890    91   1470   1030    780    600    980
Little Snake River
  Slater, nr               Apr-Jul     95    61    148    116     80     58    156
  Dixon, nr                Apr-Jul    180    52    305    230    154    114    345

BEAR RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul     99    88    135    113     85     69    112
  Woodruff Narrows Rsvr,   Apr-Jul     86    71    146    107     72     55    121
  Montpelier, nr, Stewart  Apr-Jul     83    46    220    143     62     43    182
Smiths Fork River
  Border, nr               Apr-Jul     73    82    104     86     57     40     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,Kormos




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