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Water Resources Data System
Dept 3943
1000 E. University Ave.
Laramie, WY 82071

wrds@uwyo.edu
Ph (307) 766-6651
Fax (307) 766-3785


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United States           Natural Resources             Water and Climate Center
Department of           Conservation                          Portland, Oregon
Agriculture             Service                                               
 
          S N O W  -  P R E C I P I T A T I O N    U P D A T E
 
              Based on Mountain Data from NRCS SNOTEL Sites
                    As of SUNDAY: APRIL 23 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   20.9    11.3    185    40.7    22.0    185 
 Black Bear               8170   48.4    36.8    132    56.4    40.3    140 
 Blind Bull Sum           8650   45.2    24.3    186    37.4    20.5    182 
 Cottonwood Creek         7670   27.0    17.8    152    40.6    26.2    155 
 East Rim Divide          7930   10.8     9.3    116    21.6    12.3    176 
 Grand Targhee            9260   52.0    42.7    122    46.1    33.0    140 
 Granite Creek            6770   21.9    10.0    219    36.9    20.5    180 
 Grassy Lake              7265   37.5    30.6    123    57.8    37.8    153 
 Gros Ventre Summit       8750     -M    12.9       *     -M    13.9       *
 Gunsight Pass            9820   24.4    13.6    179    26.3    15.2    173 
 Lewis Lake Divide        7850   46.7    30.7    152    57.5    37.2    155 
 Phillips Bench           8200   39.2    25.3    155    48.2    29.5    163 
 Salt River Summit        7760   17.2     8.9    193    30.2    17.6    172 
 Snake River Station      6920   14.5    10.9    133    37.3    23.8    157 
 Spring Creek Divide      9000   42.3    23.6    179    41.9    25.2    166 
 Thumb Divide             7980   20.2    14.3    141    29.2    20.0    146 
 Togwotee Pass            9580   35.1    24.3    144    40.7    26.0    157 
 Two Ocean Plateau        9240     -M    28.7       *     -M    28.9       *
 Willow Creek             8380   27.9    26.4    106    53.1    35.8    148 
 Younts Peak              8350   24.0    15.1    159    32.4    16.9    192 
                                                -----                  -----
                Basin Index (%)                  148                    160 
 

MADISON-GALLATIN

 Black Bear               8170   48.4    36.8    132    56.4    40.3    140 
 Canyon                   7870   17.2    12.0    143    26.7    17.2    155 
 Madison Plateau          7750   28.1    22.8    123    38.0    27.8    137 
 West Yellowstone         6700     .4     6.0      7    24.1    15.3    158 
 Whiskey Creek            6800   12.1    15.4     79    28.0    21.5    130 
                                                -----                  -----
                Basin Index (%)                  114                    142 
 

YELLOWSTONE

 Beartooth Lake           9360   34.6    23.6    147    29.7    21.0    141 
 Burnt Mtn                5880     .1      .0       *   15.5    14.5    107 
 Canyon                   7870   17.2    12.0    143    26.7    17.2    155 
 Cole Creek               7850   12.4    16.4     76    10.1    14.9     68 
 Evening Star             9200   40.1    24.4    164    47.1    29.1    162 
 Fisher Creek             9100   45.6    33.0    138    50.1    33.8    148 
 Northeast Entrance       7350    3.2     5.7     56    21.6    13.1    165 
 Parker Peak              9400   39.5    21.4    185    37.2    19.1    195 
 Sylvan Lake              8420   25.3    20.3    125    39.7    24.0    165 
 Thumb Divide             7980   20.2    14.3    141    29.2    20.0    146 
 Two Ocean Plateau        9240     -M    28.7       *     -M    28.9       *
 White Mill               8700   39.0    23.7    165    38.1    25.2    151 
 Wolverine                7650    3.2     6.2     52    22.2    13.1    169 
                                                -----                  -----
                Basin Index (%)                  140                    150 
 

WIND RIVER

 Burroughs Creek          8750   20.5      -M       *   28.2      -M       *
 Castle Creek             8400    8.1      -M       *   16.8      -M       *
 Cold Springs             9630   15.7     3.9    403    20.8    11.3    184 
 Deer Park                9700   34.4    16.4    210    40.6    22.1    184 
 Hobbs Park              10100   31.7    15.3    207    31.2    15.3    204 
 Kirwin                   9550   24.1    10.1    239    27.3    12.8    213 
 Little Warm              9370   18.7     9.9    189    25.8    14.2    182 
 Owl Creek                8975    8.7     3.2    272    14.3     7.1    201 
 South Pass               9040   31.9    15.3    208    30.6    19.0    161 
 St. Lawrence Alt         8620    8.2     5.1    161    18.6    10.3    181 
 Togwotee Pass            9580   35.1    24.3    144    40.7    26.0    157 
 Townsend Creek           8700   17.7     9.0    197    25.0    13.7    182 
                                                -----                  -----
                Basin Index (%)                  201                    181 
 

BIGHORN BASIN

 Bald Mtn.                9380   21.5    20.1    107    18.8    18.5    102 
 Bear Trap Meadow         8200    5.1     2.5    204    11.8     9.7    122 
 Bone Springs Div         9350   21.4    16.3    131    19.4    17.1    113 
 Grave Springs            8550    8.5     9.4     90    10.4    11.9     87 
 Kirwin                   9550   24.1    10.1    239    27.3    12.8    213 
 Marquette                8760   15.6      -M       *   19.7      -M       *
 Middle Powder            7760   10.4    12.4     84    10.1    13.1     77 
 Owl Creek                8975    8.7     3.2    272    14.3     7.1    201 
 Powder River Pass        9480   10.2    10.2    100    15.7    14.0    112 
 Shell Creek              9580   19.4    15.7    124    16.8    15.1    111 
 Timber Creek             7950    7.0     4.2    167    13.0     8.8    148 
                                                -----                  -----
                Basin Index (%)                  131                    123 
 

SHOSHONE RIVER

 Blackwater               9780   40.0    24.1    166    44.3    22.2    200 
 Evening Star             9200   40.1    24.4    164    47.1    29.1    162 
 Marquette                8760   15.6      -M       *   19.7      -M       *
 Sylvan Road              7120     .0     8.9      0    31.6    17.8    178 
 Younts Peak              8350   24.0    15.1    159    32.4    16.9    192 
                                                -----                  -----
                Basin Index (%)                  144                    181 
 

POWDER RIVER

 Bear Trap Meadow         8200    5.1     2.5    204    11.8     9.7    122 
 Cloud Peak Reservoir     9860   18.7    16.1    116    22.5    15.3    147 
 Grave Springs            8550    8.5     9.4     90    10.4    11.9     87 
 Hansen Sawmill           8360   12.4     4.5    276    17.5     9.9    177 
 Middle Powder            7760   10.4    12.4     84    10.1    13.1     77 
 Powder River Pass        9480   10.2    10.2    100    15.7    14.0    112 
 Soldier Park             8720   15.7      -M       *   17.2      -M       *
                                                -----                  -----
                Basin Index (%)                  119                    119 
 

TONGUE RIVER

 Big Goose                7990   12.2     9.2    133    16.1    13.1    123 
 Bone Springs Div         9350   21.4    16.3    131    19.4    17.1    113 
 Burgess Junction         7880   11.2    12.6     89    13.1    13.7     96 
 Dome Lake                8880   16.9    11.8    143    18.5    15.2    122 
 Little Goose             8870   15.1      -M       *   19.8      -M       *
 Sucker Creek             8880   13.7    12.7    108    15.5    16.1     96 
 Tie Creek                6870     .1     3.9      3    14.8    13.3    111 
                                                -----                  -----
                Basin Index (%)                  114                    110 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     1.4      0     8.8    10.7     82 
                                                -----                  -----
                Basin Index (%)                    0                     82 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     3.9      0    10.4    13.4     78 
 North Rapid Creek        6130     .0     3.9      0     8.8    11.4     77 
                                                -----                  -----
                Basin Index (%)                    0                     77 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   24.8    21.5    115    27.5    24.7    111 
 Blackhall Mtn            9820   34.6      -M       *   39.0      -M       *
 Columbine                9160   11.1    20.7     54    28.6    27.3    105 
 Divide Peak              8880   11.1    18.3     61    23.7    23.2    102 
 Joe Wright              10120   17.1    22.7     75    30.5    28.3    108 
 Laprele Creek            8375    6.7     7.4     91    13.6    14.0     97 
 Med Bow                 10500   36.3      -M       *   36.9      -M       *
 North French Creek      10130   24.6    32.2     76    29.5    29.1    101 
 Never Summer            10280   23.3    20.9    111    21.0      -M       *
 Old Battle              10000   36.9    33.5    110    39.5    37.5    105 
 Rawah                    9020    5.2     8.1     64    18.8    15.8    119 
 Sage Creek Basin         7850     -M     4.2       *   17.0    15.4    110 
 Sand Lake               10050   30.7    30.7    100    29.3    27.3    107 
 South Brush Creek        8440     .3     9.8      3    13.5    16.7     81 
 Tower                   10500   40.1    48.8     82    45.8    42.9    107 
 Webber Springs           9250   22.5    21.8    103    34.2    28.8    119 
 Willow Creek Pass        9540   18.3    13.5    136    19.3    14.7    131 
 Zirkel                   9340   23.3    22.5    104    43.5    30.0    145 
                                                -----                  -----
                Basin Index (%)                   89                    110 
 

SWEETWATER

 Deer Park                9700   34.4    16.4    210    40.6    22.1    184 
 Larsen Creek             9000   12.9    10.0    129    24.8      -M       *
 South Pass               9040   31.9    15.3    208    30.6    19.0    161 
                                                -----                  -----
                Basin Index (%)                  190                    173 
 

LOWER N. PLATTE

 Casper Mtn.              7900   10.0    14.2     70    14.8    16.9     88 
 Laprele Creek            8375    6.7     7.4     91    13.6    14.0     97 
 Reno Hill                8400   12.1    14.0     86    16.3    17.5     93 
 Windy Peak               7900    4.4     6.3     70    12.8    12.0    107 
                                                -----                  -----
                Basin Index (%)                   79                     95 
 

LARAMIE RIVER

 Brooklyn Lake           10240   20.5    22.5     91    24.2    23.3    104 
 Cinnabar Park            9574   12.7    19.9     64    23.4    25.8     91 
 Crow Creek               8330    1.1      .2    550*   11.0    12.2     90 
 Deadman Hill            10220   20.5    17.7    116    22.3    19.4    115 
 Rawah                    9020    5.2     8.1     64    18.8    15.8    119 
 Roach                    9700   14.9    16.7     89    22.3    21.0    106 
                                                -----                  -----
                Basin Index (%)                   88                    104 
 

S. PLATTE

 Black Mountain           8920    8.1      -M       *   14.5      -M       *
 Crow Creek               8330    1.1      .2    550*   11.0    12.2     90 
 Deadman Hill            10220   20.5    17.7    116    22.3    19.4    115 
                                                -----                  -----
                Basin Index (%)                  121*                   105 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     2.9      0    17.7    16.3    109 
 Divide Peak              8880   11.1    18.3     61    23.7    23.2    102 
 Elk River                8700    5.6    14.8     38    21.1    21.7     97 
 Little Snake River       8915   21.7    23.6     92    40.1    31.3    128 
 Old Battle              10000   36.9    33.5    110    39.5    37.5    105 
 Sage Creek Basin         7850     -M     4.2       *   17.0    15.4    110 
 Sandstone RS             8150     -M     9.6       *   16.6    19.8     84 
 Whiskey Park             8950   22.1    25.6     86    31.7    30.1    105 
                                                -----                  -----
                Basin Index (%)                   82                    106 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.9    12.3    178    24.7    14.4    172 
 Blind Bull Sum           8650   45.2    24.3    186    37.4    20.5    182 
 East Rim Divide          7930   10.8     9.3    116    21.6    12.3    176 
 Elkhart Park G.S.        9400   19.9    11.8    169    25.2    14.3    176 
 Gros Ventre Summit       8750     -M    12.9       *     -M    13.9       *
 Gunsight Pass            9820   24.4    13.6    179    26.3    15.2    173 
 Kendall R.S.             7740   15.8     7.3    216    29.8    14.9    200 
 Loomis Park              8240   24.4    12.3    198    33.1    18.2    182 
 New Fork Lake            8340   12.5     8.1    154    18.8    11.5    163 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   15.8    10.4    152    28.2    15.0    188 
 Spring Creek Divide      9000   42.3    23.6    179    41.9    25.2    166 
 Triple Peak              8500   35.3    19.2    184    42.5    26.7    159 
                                                -----                  -----
                Basin Index (%)                  176                    175 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    5.2      -M       *   17.3      -M       *
 Buck Pasture             9632   15.7      -M       *   24.9      -M       *
 EF Blacks Fork GS        9360   11.8      -M       *   19.0      -M       *
 Hams Fork                7840   10.3     5.7    181    22.7    12.3    185 
 Hewinta                  9500    6.9     7.4     93    19.0    15.3    124 
 Hickerson Park           9122    4.7     5.1     92    13.7    11.3    121 
 Hole-in-Rock             9168    5.5     5.5    100    14.6    10.8    135 
 Indian Creek             9425   41.7    23.5    177    42.8    24.0    178 
 Kelley R.S.              8180   23.6    12.0    197    31.9    19.3    165 
 Spirit Lk               10235   15.1      -M       *   19.6      -M       *
 Steel Creek Park        10158   20.3    16.4    124    22.9    18.1    127 
                                                -----                  -----
                Basin Index (%)                  149                    151 
 

UPPER BEAR RIVER

 Bear River RS            8777    1.7      -M       *   19.9      -M       *
 Bug Lake                 7987   31.9    16.4    195    35.7    20.7    172 
 Burts Miller Ranch       8000     .0      -M       *   11.2      -M       *
 Chalk Creek #1           9171   32.2    24.5    131    38.4    27.2    141 
 Hayden Fork              9130   14.8    11.0    135    31.5    22.7    139 
 Kelley R.S.              8180   23.6    12.0    197    31.9    19.3    165 
 Lily Lake                9133   11.6    10.1    115    21.4    18.6    115 
 Monte Cristo             8932   36.2    27.3    133    41.8    27.9    150 
 Salt River Summit        7760   17.2     8.9    193    30.2    17.6    172 
                                                -----                  -----
                Basin Index (%)                  152                    150 
----------------------------------------------------------------------------

 -M   = Missing data
  *   = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and

Total Precipitation values

If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.

The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.

The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.

Contact your state water supply staff for assistance.

Medians and averages are calculated for the period 1981-2010.

Provisional data, subject to revision.

* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for  the year.


* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.

The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.