FGUS65 KSTR 071955
ESPWY 
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH

                      WATER SUPPLY INFORMATION FOR
                            SOUTHWEST WYOMING
                                 AS OF    
                             June 7, 2023


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

SUBBASIN                    MAY      OCT-MAY     JUN 1       MAY
                          PRECIP     PRECIP      SNOW        FLOW
----------------------    ------     -------     -----     --------
GREEN ABV FLAMING GORGE      65        105         80        200
BEAR RIVER HEADWATERS        70        115        120        175 

                       
PERIOD ENDING: May 31, 2023            
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|      334.0|       249.9|     75||      158.3|        47|
  BIG SANDY - BIG SANDY|       38.3|        36.2|     94||       17.9|        47|
  BLACKS FORK - MEEKS C|       29.9|        29.9|    100||       28.4|        95|
  EF SMITHS FORK - STAT|       13.9|        14.2|    102||       12.8|        92|
  GREEN - FLAMING GORGE|     3749.0|      2917.4|     78||     2769.2|        74|   
  BEAR - WOODRUFF NARRO|       55.8|        63.4|    114||       39.0|        70| 
  
STREAMFLOW FORECASTS:

GREEN RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Green River
  Daniel, nr, Warren Brid  Apr-Jul    235    92    270    250    220    205    255
  Daniel, nr, Warren Brid  Jun-Jul    136    78    171    151    121    106    175
Pine Ck
  Fremont Lk, abv          Apr-Jul     95    94    110    103     85     77    101
  Fremont Lk, abv          Jun-Jul     64    82     79     72     54     46     78
New Fork River
  Big Piney, nr            Apr-Jul    350    99    425    395    320    300    355
  Big Piney, nr            Jun-Jul    185    73    260    230    155    135    255
Green River
  Fontenelle Reservoir, F  Apr-Jul    830   113    940    880    740    700    735
  Fontenelle Reservoir, F  Jun-Jul    430    91    540    480    340    300    475
Big Sandy River
  Farson, nr               Apr-Jul     56   112     67     62     50     45     50
  Farson, nr               Jun-Jul     30    94     41     36   24.0   19.3     32
Green River
  Green River, Wy, nr      Apr-Jul    850   116    960    920    770    720    735
  Green River, Wy, nr      Jun-Jul    435    91    545    505    355    305    480
EF Smiths Fork River
  Stateline Reservoir, Ro  Apr-Jul     31   111     35     33     29     27     28
  Stateline Reservoir, Ro  Jun-Jul   17.0    95     21     19   14.8   12.8   17.9
Blacks Fork River
  Robertson, nr            Apr-Jul     90   102    100     95     85     80     88
  Robertson, nr            Jun-Jul     46    82     56     51     41     36     56
Hams Fork River
  Frontier, nr, Pole Ck,   Apr-Jul     67   129     75     70     63     60     52
  Frontier, nr, Pole Ck,   Jun-Jul     27   112     35     30   23.0   19.9     24
  Viva Naughton Reservoir  Apr-Jul    102   140    115    106     96     90     73
  Viva Naughton Reservoir  Jun-Jul     33   110     46     37     27     21     30
Green River
  Flaming Gorge Reservoir  Apr-Jul   1280   133   1450   1360   1170   1100    965
  Flaming Gorge Reservoir  Jun-Jul    570    96    740    650    460    390    595

BEAR RIVER BASIN
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Bear River
  Utah-Wyoming State Line  Apr-Jul    146   134    160    153    143    130    109
  Utah-Wyoming State Line  Jun-Jul     74   117     88     81     71     58     63
  Woodruff Narrows Rsvr,   Apr-Jul    188   174    205    194    173    154    108
  Woodruff Narrows Rsvr,   Jun-Jul     63   124     81     69     48     29     51
  Stewart Dam              Apr-Jul    310   193    365    345    270    240    161
  Stewart Dam              Jun-Jul    133   164    187    169     94     64     81
Smiths Fork River
  Border, nr               Apr-Jul    105   119    115    109    101     97     88
  Border, nr               Jun-Jul     54   110     64     58     50     46     49

50% Volume that has a 50 percent chance of being exceeded (in 1000 acre-feet).
%AVG  50% volume in percent of the 1991-2020 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 1991-2020 period.

All forecast volumes reflect natural flow.  Actual observed flow may
be affected by upstream water management.

CBRFC/Alcorn/Kormos