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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

At 9:58a, 5/22/18
Temperature 64.6°F
Wind 3.0 mph


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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 MONDAY: MAY 15 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030    9.0     1.2    750*   42.3    24.0    176 
 Black Bear               8170   45.3    36.0    126    60.1    43.8    137 
 Blind Bull Sum           8650     -M    22.0       *   39.2    22.8    172 
 Cottonwood Creek         7670   19.3    10.3    187    44.1    29.5    149 
 East Rim Divide          7930     .1     3.9      3    23.1    13.9    166 
 Grand Targhee            9260   54.7    45.1    121    51.8    36.6    142 
 Granite Creek            6770   11.2     1.2    933*   38.4    22.5    171 
 Grassy Lake              7265   26.4    22.2    119    61.6    41.1    150 
 Gros Ventre Summit       8750     -M     8.6       *     -M    15.7       *
 Gunsight Pass            9820   20.2    12.2    166    28.7    17.4    165 
 Lewis Lake Divide        7850   37.5    26.2    143    59.8    40.3    148 
 Phillips Bench           8200   32.7    21.9    149    50.8    32.4    157 
 Salt River Summit        7760    4.6     1.5    307    32.0    19.5    164 
 Snake River Station      6920     .0      .0       *   39.2    26.0    151 
 Spring Creek Divide      9000   38.6    22.6    171    44.9    27.7    162 
 Thumb Divide             7980    6.3     5.1    124    30.6    22.3    137 
 Togwotee Pass            9580   32.1    24.5    131    43.4    29.1    149 
 Two Ocean Plateau        9240     -M    29.2       *     -M    32.2       *
 Willow Creek             8380     -M    19.5       *   57.7    40.1    144 
 Younts Peak              8350    5.8    13.8     42    33.6    19.0    177 
                                                -----                  -----
                Basin Index (%)                  139                    154 
 

MADISON-GALLATIN

 Black Bear               8170   45.3    36.0    126    60.1    43.8    137 
 Canyon                   7870    9.3     5.3    175    28.9    19.4    149 
 Madison Plateau          7750   19.4    17.2    113    40.2    30.6    131 
 West Yellowstone         6700     .0      .0       *   26.0    17.1    152 
 Whiskey Creek            6800    5.1     8.6     59    30.0    23.6    127 
                                                -----                  -----
                Basin Index (%)                  118                    138 
 

YELLOWSTONE

 Beartooth Lake           9360   32.2    22.6    142    31.9    23.7    135 
 Burnt Mtn                5880     .0      .0       *   18.7    18.8     99 
 Canyon                   7870    9.3     5.3    175    28.9    19.4    149 
 Cole Creek               7850   12.1    17.1     71    14.4    18.9     76 
 Evening Star             9200   34.6    25.3    137    49.6    32.6    152 
 Fisher Creek             9100   49.9    34.1    146    52.9    37.5    141 
 Northeast Entrance       7350     .0      .0       *   23.2    15.1    154 
 Parker Peak              9400   35.5    21.6    164    40.1    21.8    184 
 Sylvan Lake              8420   17.4    17.0    102    42.2    26.9    157 
 Thumb Divide             7980    6.3     5.1    124    30.6    22.3    137 
 Two Ocean Plateau        9240     -M    29.2       *     -M    32.2       *
 White Mill               8700   34.1    24.4    140    40.0    28.3    141 
 Wolverine                7650     -M      .0       *   23.7    15.1    157 
                                                -----                  -----
                Basin Index (%)                  134                    141 
 

WIND RIVER

 Burroughs Creek          8750    9.9      -M       *   29.3      -M       *
 Castle Creek             8400     .0      -M       *   17.9      -M       *
 Cold Springs             9630    6.2      .2   3100*   22.5    14.0    161 
 Deer Park                9700   30.4    13.5    225    43.6    25.5    171 
 Hobbs Park              10100   30.3    15.0    202    34.8    18.6    187 
 Kirwin                   9550   19.2    10.4    185    29.3    15.4    190 
 Little Warm              9370   12.3     6.1    202    27.6    16.9    163 
 Owl Creek                8975     .0      .0       *   15.6     9.2    170 
 South Pass               9040   27.3    10.1    270    33.9    22.1    153 
 St. Lawrence Alt         8620     .0      .1      0*   20.8    13.1    159 
 Togwotee Pass            9580   32.1    24.5    131    43.4    29.1    149 
 Townsend Creek           8700   12.4     1.2   1033    28.5    16.6    172 
                                                -----                  -----
                Basin Index (%)                  210                    166 
 

BIGHORN BASIN

 Bald Mtn.                9380   20.2    20.7     98    21.6    21.7    100 
 Bear Trap Meadow         8200     .0      .0       *   15.0    12.2    123 
 Bone Springs Div         9350   18.6    15.9    117    22.5    20.3    111 
 Grave Springs            8550    4.8     6.4     75    13.7    14.7     93 
 Kirwin                   9550   19.2    10.4    185    29.3    15.4    190 
 Marquette                8760   13.9      -M       *   23.8      -M       *
 Middle Powder            7760    5.1     8.9     57    15.0    15.9     94 
 Owl Creek                8975     .0      .0       *   15.6     9.2    170 
 Powder River Pass        9480    4.0     8.3     48    18.2    16.8    108 
 Shell Creek              9580   14.5    16.6     87    18.8    18.1    104 
 Timber Creek             7950     .0      .0       *   15.1    11.7    129 
                                                -----                  -----
                Basin Index (%)                   99                    118 
 

SHOSHONE RIVER

 Blackwater               9780   39.0    24.8    157    46.7    25.3    185 
 Evening Star             9200   34.6    25.3    137    49.6    32.6    152 
 Marquette                8760   13.9      -M       *   23.8      -M       *
 Sylvan Road              7120     .0      .0       *   32.5    19.8    164 
 Younts Peak              8350    5.8    13.8     42    33.6    19.0    177 
                                                -----                  -----
                Basin Index (%)                  124                    168 
 

POWDER RIVER

 Bear Trap Meadow         8200     .0      .0       *   15.0    12.2    123 
 Cloud Peak Reservoir     9860   17.5    16.3    107    26.6    19.0    140 
 Grave Springs            8550    4.8     6.4     75    13.7    14.7     93 
 Hansen Sawmill           8360    7.7      .0       *   18.7    12.5    150 
 Middle Powder            7760    5.1     8.9     57    15.0    15.9     94 
 Powder River Pass        9480    4.0     8.3     48    18.2    16.8    108 
 Soldier Park             8720    8.8      -M       *   20.7      -M       *
                                                -----                  -----
                Basin Index (%)                   98                    118 
 

TONGUE RIVER

 Big Goose                7990    8.9     8.8    101    20.2    16.6    122 
 Bone Springs Div         9350   18.6    15.9    117    22.5    20.3    111 
 Burgess Junction         7880    7.5    10.6     71    16.3    16.6     98 
 Dome Lake                8880   13.9     9.7    143    22.5    18.5    122 
 Little Goose             8870   11.8      -M       *   24.4      -M       *
 Sucker Creek             8880   10.3    11.3     91    19.3    19.7     98 
 Tie Creek                6870     .1      .2     50*   20.1    16.8    120 
                                                -----                  -----
                Basin Index (%)                  105                    111 
 

BELLE FOURCHE

 Cole Canyon              5910     .0      .0       *   12.4    14.4     86 
                                                -----                  -----
                Basin Index (%)                     *                    86 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .1      .0       *   12.9    16.2     80 
 North Rapid Creek        6130     .0      .0       *   11.0    14.2     77 
                                                -----                  -----
                Basin Index (%)                     *                    79 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   21.4    21.6     99    30.4    28.2    108 
 Blackhall Mtn            9820   29.7      -M       *   42.0      -M       *
 Columbine                9160     .0     8.5      0    32.4    30.2    107 
 Divide Peak              8880     .1    10.5      1    26.6    26.0    102 
 Joe Wright              10120   14.2    22.8     62    33.9    32.2    105 
 Laprele Creek            8375     .3      .0       *   15.9    16.4     97 
 Med Bow                 10500   36.4      -M       *   41.3      -M       *
 North French Creek      10130   22.9    32.1     71    34.3    33.0    104 
 Never Summer            10280   21.9    22.1     99    23.2      -M       *
 Old Battle              10000   35.7    35.1    102    43.6    41.5    105 
 Rawah                    9020     .1     1.4      7    20.8    18.8    111 
 Sage Creek Basin         7850     -M      .0       *   18.2    17.2    106 
 Sand Lake               10050   31.1    30.5    102    32.3    31.2    104 
 South Brush Creek        8440     .0     1.5      0    16.8    19.6     86 
 Tower                   10500   38.6    49.9     77    52.0    47.2    110 
 Webber Springs           9250   13.5    16.4     82    37.5    31.7    118 
 Willow Creek Pass        9540   13.3    11.4    117    21.0    17.0    124 
 Zirkel                   9340   12.8    16.7     77    47.3    33.2    142 
                                                -----                  -----
                Basin Index (%)                   81                    109 
 

SWEETWATER

 Deer Park                9700   30.4    13.5    225    43.6    25.5    171 
 Larsen Creek             9000     .3     5.0      6    26.2      -M       *
 South Pass               9040   27.3    10.1    270    33.9    22.1    153 
                                                -----                  -----
                Basin Index (%)                  203                    163 
 

LOWER N. PLATTE

 Casper Mtn.              7900    1.9     9.1     21    19.8    19.9     99 
 Laprele Creek            8375     .3      .0       *   15.9    16.4     97 
 Reno Hill                8400    1.9     7.8     24    20.1    20.8     97 
 Windy Peak               7900     .0      .0       *   15.4    14.2    108 
                                                -----                  -----
                Basin Index (%)                   24                    100 
 

LARAMIE RIVER

 Brooklyn Lake           10240   14.2    19.7     72    27.0    26.6    102 
 Cinnabar Park            9574    7.3    15.3     48    27.0    29.2     92 
 Crow Creek               8330     .0      .0       *   12.5    14.9     84 
 Deadman Hill            10220   16.2    18.3     89    25.2    22.4    112 
 Rawah                    9020     .1     1.4      7    20.8    18.8    111 
 Roach                    9700    9.6    13.9     69    25.8    24.0    108 
                                                -----                  -----
                Basin Index (%)                   69                    102 
 

S. PLATTE

 Black Mountain           8920     -M      -M       *   16.9      -M       *
 Crow Creek               8330     .0      .0       *   12.5    14.9     84 
 Deadman Hill            10220   16.2    18.3     89    25.2    22.4    112 
                                                -----                  -----
                Basin Index (%)                   89*                   101 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0      .0       *   19.6    18.4    107 
 Divide Peak              8880     .1    10.5      1    26.6    26.0    102 
 Elk River                8700     .1     3.3      3    23.2    24.2     96 
 Little Snake River       8915   13.5    18.0     75    43.7    34.9    125 
 Old Battle              10000   35.7    35.1    102    43.6    41.5    105 
 Sage Creek Basin         7850     -M      .0       *   18.2    17.2    106 
 Sandstone RS             8150     .0      .0       *   19.5    22.2     88 
 Whiskey Park             8950   17.9    24.6     73    35.4    33.5    106 
                                                -----                  -----
                Basin Index (%)                   74                    105 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   13.1     7.6    172    25.9    16.5    157 
 Blind Bull Sum           8650     -M    22.0       *   39.2    22.8    172 
 East Rim Divide          7930     .1     3.9      3    23.1    13.9    166 
 Elkhart Park G.S.        9400   12.7     8.5    149    27.0    16.4    165 
 Gros Ventre Summit       8750     -M     8.6       *     -M    15.7       *
 Gunsight Pass            9820   20.2    12.2    166    28.7    17.4    165 
 Kendall R.S.             7740     .2      .0       *   31.3    16.5    190 
 Loomis Park              8240   14.5     5.9    246    35.2    20.2    174 
 New Fork Lake            8340     .6     1.1     55    21.0    13.2    159 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060     .0     4.8      0    29.3    16.6    177 
 Spring Creek Divide      9000   38.6    22.6    171    44.9    27.7    162 
 Triple Peak              8500   25.2    12.7    198    44.8    29.7    151 
                                                -----                  -----
                Basin Index (%)                  158                    166 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869     .0      -M       *   19.1      -M       *
 Buck Pasture             9632    6.2      -M       *   27.6      -M       *
 EF Blacks Fork GS        9360     -M      -M       *   23.1      -M       *
 Hams Fork                7840     .0      .0       *   24.0    14.2    169 
 Hewinta                  9500     .0      .1      0*   21.1    17.5    121 
 Hickerson Park           9122     .0      .0       *   14.9    13.2    113 
 Hole-in-Rock             9168     .0      .0       *   15.8    12.7    124 
 Indian Creek             9425   34.8    21.2    164    45.2    26.6    170 
 Kelley R.S.              8180    8.4     6.4    131    34.0    21.5    158 
 Spirit Lk               10235    4.8      -M       *   21.0      -M       *
 Steel Creek Park        10158   16.2    16.5     98    25.5    20.7    123 
                                                -----                  -----
                Basin Index (%)                  134*                   143 
 

UPPER BEAR RIVER

 Bear River RS            8777     .0      -M       *   21.5      -M       *
 Bug Lake                 7987   21.1    10.2    207    37.6    23.1    163 
 Burts Miller Ranch       8000     .0      -M       *   11.9      -M       *
 Chalk Creek #1           9171   24.8    19.4    128    41.1    30.4    135 
 Hayden Fork              9130     .4     3.1     13    32.5    25.5    127 
 Kelley R.S.              8180    8.4     6.4    131    34.0    21.5    158 
 Lily Lake                9133     .0     1.2      0*   23.0    21.0    110 
 Monte Cristo             8932   28.3    19.0    149    44.7    31.2    143 
 Salt River Summit        7760    4.6     1.5    307    32.0    19.5    164 
                                                -----                  -----
                Basin Index (%)                  144                    142 

-----------------------------------------------------------------------------


 -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.