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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 THURSDAY: MAY 4 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   19.3     7.8    247    42.2    23.1    183 
 Black Bear               8170   50.5    37.3    135    59.8    42.2    142 
 Blind Bull Sum           8650   48.8    22.8    214    39.0    21.6    181 
 Cottonwood Creek         7670   28.7    14.4    199    44.0    27.8    158 
 East Rim Divide          7930    8.6     7.7    112    22.5    13.1    172 
 Grand Targhee            9260   59.3    45.7    130    51.1    35.2    145 
 Granite Creek            6770   20.4     7.6    268    38.4    21.6    178 
 Grassy Lake              7265   39.8    27.9    143    61.5    39.7    155 
 Gros Ventre Summit       8750   20.4    11.1    184    26.6    14.9    179 
 Gunsight Pass            9820   26.2    12.0    218    28.2    16.3    173 
 Lewis Lake Divide        7850   48.1    29.6    162    59.8    39.0    153 
 Phillips Bench           8200   41.3    24.5    169    50.7    31.0    164 
 Salt River Summit        7760   16.9     7.4    228    32.0    18.6    172 
 Snake River Station      6920   12.9     5.6    230    39.3    25.0    157 
 Spring Creek Divide      9000   44.6    24.3    184    44.6    26.5    168 
 Thumb Divide             7980   19.1    10.8    177    30.5    21.3    143 
 Togwotee Pass            9580   36.9    24.7    149    43.1    27.7    156 
 Two Ocean Plateau        9240     -M    29.9       *     -M    30.5       *
 Willow Creek             8380   29.4    22.0    134    57.6    38.1    151 
 Younts Peak              8350   21.7    15.8    137    33.7    18.0    187 
                                                -----                  -----
                Basin Index (%)                  165                    161 
 

MADISON-GALLATIN

 Black Bear               8170   50.5    37.3    135    59.8    42.2    142 
 Canyon                   7870   18.1     9.1    199    28.8    18.2    158 
 Madison Plateau          7750   30.1    20.9    144    40.0    29.2    137 
 West Yellowstone         6700     .0      .2      0*   26.0    16.2    160 
 Whiskey Creek            6800   12.0    13.3     90    29.8    22.6    132 
                                                -----                  -----
                Basin Index (%)                  137                    144 
 

YELLOWSTONE

 Beartooth Lake           9360   36.3    22.7    160    31.6    22.2    142 
 Burnt Mtn                5880     .0      .0       *   18.5    16.2    114 
 Canyon                   7870   18.1     9.1    199    28.8    18.2    158 
 Cole Creek               7850   17.2    16.7    103    14.3    16.7     86 
 Evening Star             9200   41.7    24.9    167    49.3    30.8    160 
 Fisher Creek             9100   48.3    32.7    148    52.5    35.5    148 
 Northeast Entrance       7350     .8     1.6     50    23.1    14.0    165 
 Parker Peak              9400   42.9    21.2    202    40.0    20.3    197 
 Sylvan Lake              8420   26.6    19.0    140    42.0    25.4    165 
 Thumb Divide             7980   19.1    10.8    177    30.5    21.3    143 
 Two Ocean Plateau        9240     -M    29.9       *     -M    30.5       *
 White Mill               8700   40.4    24.0    168    40.0    26.6    150 
 Wolverine                7650    1.4     1.1    127    23.8    14.0    170 
                                                -----                  -----
                Basin Index (%)                  159                    151 
 

WIND RIVER

 Burroughs Creek          8750   19.2      -M       *   29.3      -M       *
 Castle Creek             8400    5.9      -M       *   17.3      -M       *
 Cold Springs             9630   15.2     1.4   1086    22.3    12.7    176 
 Deer Park                9700   36.8    15.4    239    43.4    23.8    182 
 Hobbs Park              10100   34.8    16.0    218    34.5    17.0    203 
 Kirwin                   9550   25.4    10.6    240    29.2    14.1    207 
 Little Warm              9370   19.0     8.1    235    27.2    15.6    174 
 Owl Creek                8975    7.8      .6   1300    15.3     8.1    189 
 South Pass               9040   33.8    14.1    240    33.7    20.7    163 
 St. Lawrence Alt         8620    8.8     2.0    440    20.6    11.8    175 
 Togwotee Pass            9580   36.9    24.7    149    43.1    27.7    156 
 Townsend Creek           8700   19.3     6.6    292    28.2    15.2    186 
                                                -----                  -----
                Basin Index (%)                  239                    178 
 

BIGHORN BASIN

 Bald Mtn.                9380   24.7    20.4    121    21.5    20.0    108 
 Bear Trap Meadow         8200    6.6      .4   1650*   14.9    10.9    137 
 Bone Springs Div         9350   23.9    16.4    146    21.7    18.6    117 
 Grave Springs            8550   11.4     9.3    123    13.7    13.1    105 
 Kirwin                   9550   25.4    10.6    240    29.2    14.1    207 
 Marquette                8760   20.4      -M       *   23.8      -M       *
 Middle Powder            7760   13.6    11.4    119    14.2    14.4     99 
 Owl Creek                8975    7.8      .6   1300    15.3     8.1    189 
 Powder River Pass        9480   11.8     9.1    130    18.1    15.4    118 
 Shell Creek              9580   20.4    16.0    128    18.3    16.6    110 
 Timber Creek             7950    7.3     2.5    292    15.1    10.2    148 
                                                -----                  -----
                Basin Index (%)                  158                    129 
 

SHOSHONE RIVER

 Blackwater               9780   42.1    25.8    163    46.4    23.8    195 
 Evening Star             9200   41.7    24.9    167    49.3    30.8    160 
 Marquette                8760   20.4      -M       *   23.8      -M       *
 Sylvan Road              7120     .0     4.1      0    32.5    18.8    173 
 Younts Peak              8350   21.7    15.8    137    33.7    18.0    187 
                                                -----                  -----
                Basin Index (%)                  149                    177 
 

POWDER RIVER

 Bear Trap Meadow         8200    6.6      .4   1650*   14.9    10.9    137 
 Cloud Peak Reservoir     9860   22.0    16.3    135    26.3    17.0    155 
 Grave Springs            8550   11.4     9.3    123    13.7    13.1    105 
 Hansen Sawmill           8360   15.4     1.7    906    18.9    11.1    170 
 Middle Powder            7760   13.6    11.4    119    14.2    14.4     99 
 Powder River Pass        9480   11.8     9.1    130    18.1    15.4    118 
 Soldier Park             8720   17.9      -M       *   20.5      -M       *
                                                -----                  -----
                Basin Index (%)                  168                    130 
 

TONGUE RIVER

 Big Goose                7990   15.2     9.4    162    20.0    14.4    139 
 Bone Springs Div         9350   23.9    16.4    146    21.7    18.6    117 
 Burgess Junction         7880   13.4    11.8    114    15.8    15.1    105 
 Dome Lake                8880   19.7    11.3    174    22.0    16.7    132 
 Little Goose             8870   19.1      -M       *   24.0      -M       *
 Sucker Creek             8880   16.4    11.9    138    19.0    17.7    107 
 Tie Creek                6870    4.2     2.5    168    19.7    14.7    134 
                                                -----                  -----
                Basin Index (%)                  147                    122 
 

BELLE FOURCHE

 Cole Canyon              5910    1.3      .0       *   12.0    12.4     97 
                                                -----                  -----
                Basin Index (%)                     *                    97 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0      .2      0*   11.7    14.6     80 
 North Rapid Creek        6130     .0      .0       *   10.0    12.6     79 
                                                -----                  -----
                Basin Index (%)                    0*                    80 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   26.9    22.3    121    29.9    26.5    113 
 Blackhall Mtn            9820   37.1      -M       *   42.1      -M       *
 Columbine                9160   12.7    17.1     74    32.0    28.9    111 
 Divide Peak              8880   12.1    17.5     69    26.0    24.8    105 
 Joe Wright              10120   19.5    22.9     85    33.4    30.4    110 
 Laprele Creek            8375    6.0     5.4    111    15.0    15.3     98 
 Med Bow                 10500   40.8      -M       *   41.2      -M       *
 North French Creek      10130   28.9    32.7     88    34.0    31.2    109 
 Never Summer            10280   25.4    21.8    117    22.6      -M       *
 Old Battle              10000   40.4    34.8    116    43.1    39.7    109 
 Rawah                    9020    5.8     4.8    121    20.6    17.6    117 
 Sage Creek Basin         7850     -M      .8       *   18.0    16.4    110 
 Sand Lake               10050   33.5    31.6    106    32.2    29.5    109 
 South Brush Creek        8440     .3     7.9      4    15.5    18.2     85 
 Tower                   10500   44.5    50.7     88    50.9    45.3    112 
 Webber Springs           9250   22.9    21.1    109    37.0    30.3    122 
 Willow Creek Pass        9540   19.3    14.5    133    20.5    16.0    128 
 Zirkel                   9340   24.8    20.7    120    46.7    31.3    149 
                                                -----                  -----
                Basin Index (%)                   99                    113 
 

SWEETWATER

 Deer Park                9700   36.8    15.4    239    43.4    23.8    182 
 Larsen Creek             9000   11.9     8.3    143    26.0      -M       *
 South Pass               9040   33.8    14.1    240    33.7    20.7    163 
                                                -----                  -----
                Basin Index (%)                  218                    173 
 

LOWER N. PLATTE

 Casper Mtn.              7900   12.9    12.5    103    18.7    18.4    102 
 Laprele Creek            8375    6.0     5.4    111    15.0    15.3     98 
 Reno Hill                8400   13.5    12.1    112    18.6    19.3     96 
 Windy Peak               7900    3.6     3.1    116    14.1    13.2    107 
                                                -----                  -----
                Basin Index (%)                  109                    100 
 

LARAMIE RIVER

 Brooklyn Lake           10240   21.6    23.0     94    26.6    25.1    106 
 Cinnabar Park            9574   14.5    18.8     77    26.8    27.3     98 
 Crow Creek               8330     .0      .0       *   12.3    13.7     90 
 Deadman Hill            10220   22.8    19.1    119    24.9    21.0    119 
 Rawah                    9020    5.8     4.8    121    20.6    17.6    117 
 Roach                    9700   16.9    17.1     99    25.3    22.6    112 
                                                -----                  -----
                Basin Index (%)                   99                    107 
 

S. PLATTE

 Black Mountain           8920    8.5      -M       *   16.4      -M       *
 Crow Creek               8330     .0      .0       *   12.3    13.7     90 
 Deadman Hill            10220   22.8    19.1    119    24.9    21.0    119 
                                                -----                  -----
                Basin Index (%)                  119*                   107 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0      .0       *   19.4    17.4    111 
 Divide Peak              8880   12.1    17.5     69    26.0    24.8    105 
 Elk River                8700    5.2    12.0     43    23.3    23.1    101 
 Little Snake River       8915   23.5    21.7    108    43.4    33.2    131 
 Old Battle              10000   40.4    34.8    116    43.1    39.7    109 
 Sage Creek Basin         7850     -M      .8       *   18.0    16.4    110 
 Sandstone RS             8150     -M     4.6       *   19.0    21.0     90 
 Whiskey Park             8950   24.6    26.9     91    35.3    32.0    110 
                                                -----                  -----
                Basin Index (%)                   94                    110 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   22.3     9.4    237    25.8    15.5    166 
 Blind Bull Sum           8650   48.8    22.8    214    39.0    21.6    181 
 East Rim Divide          7930    8.6     7.7    112    22.5    13.1    172 
 Elkhart Park G.S.        9400   20.9    10.6    197    26.3    15.2    173 
 Gros Ventre Summit       8750   20.4    11.1    184    26.6    14.9    179 
 Gunsight Pass            9820   26.2    12.0    218    28.2    16.3    173 
 Kendall R.S.             7740   12.9     2.6    496    30.6    15.7    195 
 Loomis Park              8240   23.3    10.0    233    34.4    19.2    179 
 New Fork Lake            8340   11.2     5.5    204    19.6    12.3    159 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   13.1     8.5    154    29.2    15.8    185 
 Spring Creek Divide      9000   44.6    24.3    184    44.6    26.5    168 
 Triple Peak              8500   36.4    16.3    223    44.9    28.2    159 
                                                -----                  -----
                Basin Index (%)                  205                    173 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    4.6      -M       *   18.8      -M       *
 Buck Pasture             9632   16.4      -M       *   27.3      -M       *
 EF Blacks Fork GS        9360   12.4      -M       *   21.5      -M       *
 Hams Fork                7840    8.5     1.5    567    23.8    13.3    179 
 Hewinta                  9500    7.2     4.2    171    20.9    16.5    127 
 Hickerson Park           9122    2.8     3.2     88    14.9    12.2    122 
 Hole-in-Rock             9168    3.5     1.7    206    15.7    11.8    133 
 Indian Creek             9425   44.5    22.1    201    45.0    25.3    178 
 Kelley R.S.              8180   24.1    10.4    232    33.7    20.5    164 
 Spirit Lk               10235   15.6      -M       *   20.9      -M       *
 Steel Creek Park        10158   22.4    17.4    129    25.3    19.5    130 
                                                -----                  -----
                Basin Index (%)                  187                    151 
 

UPPER BEAR RIVER

 Bear River RS            8777     .5      -M       *   21.4      -M       *
 Bug Lake                 7987   32.1    13.8    233    37.6    22.0    171 
 Burts Miller Ranch       8000     .0      -M       *   11.9      -M       *
 Chalk Creek #1           9171   35.0    23.4    150    41.1    28.9    142 
 Hayden Fork              9130   14.2     8.6    165    33.4    24.1    139 
 Kelley R.S.              8180   24.1    10.4    232    33.7    20.5    164 
 Lily Lake                9133   12.4     9.7    128    23.0    19.9    116 
 Monte Cristo             8932   39.4    25.3    156    44.6    29.7    150 
 Salt River Summit        7760   16.9     7.4    228    32.0    18.6    172 
                                                -----                  -----
                Basin Index (%)                  177                    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.