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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 9:28p, 5/22/18
Temperature 49.7°F
Wind 0.0 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 SATURDAY: MAY 13 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030     -M     2.7       *     -M    23.9       *
 Black Bear               8170   45.8    36.5    125    59.8    43.6    137 
 Blind Bull Sum           8650     -M    22.2       *   39.2    22.6    173 
 Cottonwood Creek         7670   20.4    11.6    176    44.1    29.3    151 
 East Rim Divide          7930     .1     5.0      2    23.1    13.8    167 
 Grand Targhee            9260   56.5    45.9    123    51.8    36.5    142 
 Granite Creek            6770   13.1     3.2    409    38.4    22.4    171 
 Grassy Lake              7265     -M    23.9       *     -M    40.9       *
 Gros Ventre Summit       8750   15.3     9.2    166    26.7    15.6    171 
 Gunsight Pass            9820   21.2    12.4    171    28.7    17.3    166 
 Lewis Lake Divide        7850   38.9    27.9    139    59.7    40.1    149 
 Phillips Bench           8200   33.8    22.5    150    50.8    32.3    157 
 Salt River Summit        7760    6.0     2.7    222    32.0    19.4    165 
 Snake River Station      6920     .0      .6      0*   39.2    25.8    152 
 Spring Creek Divide      9000   40.7    23.1    176    44.9    27.5    163 
 Thumb Divide             7980     -M     6.8       *     -M    22.1       *
 Togwotee Pass            9580   32.5    25.1    129    43.3    29.0    149 
 Two Ocean Plateau        9240     -M    29.4       *     -M    32.0       *
 Willow Creek             8380     -M    20.2       *     -M    39.9       *
 Younts Peak              8350    8.6    14.5     59    33.7    18.9    178 
                                                -----                  -----
                Basin Index (%)                  139                    156 
 

MADISON-GALLATIN

 Black Bear               8170   45.8    36.5    125    59.8    43.6    137 
 Canyon                   7870   10.4     6.3    165    28.8    19.2    150 
 Madison Plateau          7750   20.1    18.4    109    40.1    30.3    132 
 West Yellowstone         6700     .0      .0       *   25.9    16.9    153 
 Whiskey Creek            6800    5.8     9.5     61    30.0    23.4    128 
                                                -----                  -----
                Basin Index (%)                  116                    138 
 

YELLOWSTONE

 Beartooth Lake           9360     -M    22.8       *     -M    23.5       *
 Burnt Mtn                5880     .0      .0       *   18.6    18.7     99 
 Canyon                   7870   10.4     6.3    165    28.8    19.2    150 
 Cole Creek               7850   12.7    17.1     74    14.2    18.8     76 
 Evening Star             9200   34.8    25.5    136    49.6    32.3    154 
 Fisher Creek             9100     -M    34.4       *     -M    37.2       *
 Northeast Entrance       7350     -M      .5       *     -M    14.9       *
 Parker Peak              9400   36.5    22.0    166    40.1    21.6    186 
 Sylvan Lake              8420     -M    17.5       *   42.1    26.8    157 
 Thumb Divide             7980     -M     6.8       *     -M    22.1       *
 Two Ocean Plateau        9240     -M    29.4       *     -M    32.0       *
 White Mill               8700   35.2    24.8    142    40.1    28.0    143 
 Wolverine                7650     -M      .0       *   23.7    15.0    158 
                                                -----                  -----
                Basin Index (%)                  135*                   143 
 

WIND RIVER

 Burroughs Creek          8750   11.1      -M       *   29.4      -M       *
 Castle Creek             8400     -M      -M       *     -M      -M       *
 Cold Springs             9630    7.9      .8    988    22.6    13.9    163 
 Deer Park                9700   31.9    14.2    225    43.5    25.4    171 
 Hobbs Park              10100   31.3    15.6    201    34.9    18.5    189 
 Kirwin                   9550     -M    10.7       *     -M    15.2       *
 Little Warm              9370   13.4     6.5    206    27.6    16.8    164 
 Owl Creek                8975     .0      .3      0*   15.6     9.1    171 
 South Pass               9040   28.2    10.9    259    33.9    21.9    155 
 St. Lawrence Alt         8620     .0      .4      0*   20.8    13.0    160 
 Togwotee Pass            9580   32.5    25.1    129    43.3    29.0    149 
 Townsend Creek           8700   14.1     2.3    613    28.4    16.5    172 
                                                -----                  -----
                Basin Index (%)                  209                    165 
 

BIGHORN BASIN

 Bald Mtn.                9380   20.9    20.8    100    21.6    21.5    100 
 Bear Trap Meadow         8200     .0      .0       *   15.0    12.0    125 
 Bone Springs Div         9350   19.3    16.3    118    22.4    20.1    111 
 Grave Springs            8550    6.7     7.1     94    13.8    14.6     95 
 Kirwin                   9550     -M    10.7       *     -M    15.2       *
 Marquette                8760   15.1      -M       *   23.9      -M       *
 Middle Powder            7760    6.9     9.9     70    14.7    15.7     94 
 Owl Creek                8975     .0      .3      0*   15.6     9.1    171 
 Powder River Pass        9480    5.6     8.7     64    18.2    16.6    110 
 Shell Creek              9580   15.8    16.8     94    18.7    18.0    104 
 Timber Creek             7950     .1      .8     12    15.1    11.6    130 
                                                -----                  -----
                Basin Index (%)                   93                    111 
 

SHOSHONE RIVER

 Blackwater               9780   39.7    24.6    161    46.6    25.1    186 
 Evening Star             9200   34.8    25.5    136    49.6    32.3    154 
 Marquette                8760   15.1      -M       *   23.9      -M       *
 Sylvan Road              7120     .0      .2      0*   32.3    19.6    165 
 Younts Peak              8350    8.6    14.5     59    33.7    18.9    178 
                                                -----                  -----
                Basin Index (%)                  128                    169 
 

POWDER RIVER

 Bear Trap Meadow         8200     .0      .0       *   15.0    12.0    125 
 Cloud Peak Reservoir     9860   18.6    16.6    112    26.5    18.8    141 
 Grave Springs            8550    6.7     7.1     94    13.8    14.6     95 
 Hansen Sawmill           8360    9.7      .4   2425*   18.9    12.3    154 
 Middle Powder            7760    6.9     9.9     70    14.7    15.7     94 
 Powder River Pass        9480    5.6     8.7     64    18.2    16.6    110 
 Soldier Park             8720   11.4      -M       *   20.8      -M       *
                                                -----                  -----
                Basin Index (%)                  111                    119 
 

TONGUE RIVER

 Big Goose                7990   10.4     9.6    108    20.2    16.5    122 
 Bone Springs Div         9350   19.3    16.3    118    22.4    20.1    111 
 Burgess Junction         7880    9.0    11.2     80    16.4    16.4    100 
 Dome Lake                8880   15.1    10.7    141    22.2    18.4    121 
 Little Goose             8870   13.6      -M       *   24.3      -M       *
 Sucker Creek             8880   11.6    12.2     95    19.4    19.5     99 
 Tie Creek                6870     .2      .6     33    19.9    16.7    119 
                                                -----                  -----
                Basin Index (%)                  108                    112 
 

BELLE FOURCHE

 Cole Canyon              5910     .0      .0       *   12.4    14.2     87 
                                                -----                  -----
                Basin Index (%)                     *                    87 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .1      .0       *   12.3    16.0     77 
 North Rapid Creek        6130     .0      .0       *   10.3    14.1     73 
                                                -----                  -----
                Basin Index (%)                     *                    75 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   22.7    22.1    103    30.4    28.0    109 
 Blackhall Mtn            9820   31.9      -M       *   42.3      -M       *
 Columbine                9160     -M    10.3       *     -M    29.9       *
 Divide Peak              8880    2.2    12.2     18    26.4    25.8    102 
 Joe Wright              10120   16.1    23.1     70    34.0    31.9    107 
 Laprele Creek            8375     .3      .6     50*   16.0    16.3     98 
 Med Bow                 10500   37.3      -M       *   41.3      -M       *
 North French Creek      10130   24.4    32.3     76    34.3    32.8    105 
 Never Summer            10280   23.0    22.2    104    23.1      -M       *
 Old Battle              10000     -M    36.4       *     -M    41.3       *
 Rawah                    9020     .1     1.8      6    20.9    18.6    112 
 Sage Creek Basin         7850     -M      .0       *   18.2    17.1    106 
 Sand Lake               10050   32.3    31.3    103    32.3    31.0    104 
 South Brush Creek        8440     .0     2.8      0    17.1    19.4     88 
 Tower                   10500   42.7    50.7     84    52.0    47.0    111 
 Webber Springs           9250   15.7    17.7     89    37.5    31.5    119 
 Willow Creek Pass        9540   15.0    12.2    123    21.0    16.7    126 
 Zirkel                   9340   15.6    18.3     85    47.4    33.1    143 
                                                -----                  -----
                Basin Index (%)                   85                    111 
 

SWEETWATER

 Deer Park                9700   31.9    14.2    225    43.5    25.4    171 
 Larsen Creek             9000    1.8     5.6     32    26.2      -M       *
 South Pass               9040   28.2    10.9    259    33.9    21.9    155 
                                                -----                  -----
                Basin Index (%)                  202                    164 
 

LOWER N. PLATTE

 Casper Mtn.              7900    4.5    10.4     43    19.7    19.8     99 
 Laprele Creek            8375     .3      .6     50*   16.0    16.3     98 
 Reno Hill                8400    4.5     8.9     51    20.2    20.6     98 
 Windy Peak               7900     .1      .0       *   15.4    14.1    109 
                                                -----                  -----
                Basin Index (%)                   47                    101 
 

LARAMIE RIVER

 Brooklyn Lake           10240   16.1    20.5     79    27.0    26.4    102 
 Cinnabar Park            9574    9.2    16.3     56    27.0    29.0     93 
 Crow Creek               8330     .0      .0       *   12.5    14.7     85 
 Deadman Hill            10220   17.9    18.4     97    25.2    22.1    114 
 Rawah                    9020     .1     1.8      6    20.9    18.6    112 
 Roach                    9700     -M    14.6       *     -M    23.7       *
                                                -----                  -----
                Basin Index (%)                   76                    102 
 

S. PLATTE

 Black Mountain           8920     -M      -M       *   16.8      -M       *
 Crow Creek               8330     .0      .0       *   12.5    14.7     85 
 Deadman Hill            10220   17.9    18.4     97    25.2    22.1    114 
                                                -----                  -----
                Basin Index (%)                   97*                   102 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     -M      .0       *     -M    18.3       *
 Divide Peak              8880    2.2    12.2     18    26.4    25.8    102 
 Elk River                8700     .1     5.2      2    23.2    24.1     96 
 Little Snake River       8915     -M    19.3       *     -M    34.8       *
 Old Battle              10000     -M    36.4       *     -M    41.3       *
 Sage Creek Basin         7850     -M      .0       *   18.2    17.1    106 
 Sandstone RS             8150     .0      .0       *   19.7    22.1     89 
 Whiskey Park             8950   20.6    25.6     80    35.4    33.3    106 
                                                -----                  -----
                Basin Index (%)                   53*                   100 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   14.5     8.4    173    25.8    16.4    157 
 Blind Bull Sum           8650     -M    22.2       *   39.2    22.6    173 
 East Rim Divide          7930     .1     5.0      2    23.1    13.8    167 
 Elkhart Park G.S.        9400   13.8     9.2    150    26.6    16.3    163 
 Gros Ventre Summit       8750   15.3     9.2    166    26.7    15.6    171 
 Gunsight Pass            9820   21.2    12.4    171    28.7    17.3    166 
 Kendall R.S.             7740    2.6      .0       *   31.4    16.4    191 
 Loomis Park              8240   15.6     6.5    240    35.2    20.1    175 
 New Fork Lake            8340     -M     1.7       *     -M    13.1       *
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060    1.9     6.4     30    29.3    16.5    178 
 Spring Creek Divide      9000   40.7    23.1    176    44.9    27.5    163 
 Triple Peak              8500   26.7    13.8    193    44.9    29.6    152 
                                                -----                  -----
                Basin Index (%)                  162                    168 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869     .2      -M       *   19.0      -M       *
 Buck Pasture             9632     -M      -M       *     -M      -M       *
 EF Blacks Fork GS        9360     -M      -M       *     -M      -M       *
 Hams Fork                7840     .0      .0       *   24.0    14.1    170 
 Hewinta                  9500     -M      .3       *     -M    17.3       *
 Hickerson Park           9122     .1      .0       *   15.0    13.1    115 
 Hole-in-Rock             9168     -M      .0       *     -M    12.6       *
 Indian Creek             9425   36.2    21.3    170    45.2    26.5    171 
 Kelley R.S.              8180   10.2     7.4    138    34.0    21.4    159 
 Spirit Lk               10235     -M      -M       *     -M      -M       *
 Steel Creek Park        10158   17.4    17.2    101    25.5    20.5    124 
                                                -----                  -----
                Basin Index (%)                  139*                   150*
 

UPPER BEAR RIVER

 Bear River RS            8777     .0      -M       *   21.4      -M       *
 Bug Lake                 7987     -M    11.4       *     -M    22.9       *
 Burts Miller Ranch       8000     -M      -M       *     -M      -M       *
 Chalk Creek #1           9171   26.7    20.3    132    41.0    30.2    136 
 Hayden Fork              9130    1.8     4.5     40    32.7    25.3    129 
 Kelley R.S.              8180   10.2     7.4    138    34.0    21.4    159 
 Lily Lake                9133     -M     2.8       *     -M    20.9       *
 Monte Cristo             8932   29.9    20.1    149    44.7    31.1    144 
 Salt River Summit        7760    6.0     2.7    222    32.0    19.4    165 
                                                -----                  -----
                Basin Index (%)                  136                    145 

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


 -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.