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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 12:53a, 5/25/18
Temperature 53.7°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: APRIL 22 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   21.3    11.5    185    40.7    21.9    186 
 Black Bear               8170   48.2    36.9    131    56.4    40.2    140 
 Blind Bull Sum           8650   44.5    24.2    184    37.3    20.4    183 
 Cottonwood Creek         7670   27.6    18.1    152    40.5    26.1    155 
 East Rim Divide          7930   11.7     9.4    124    21.5    12.3    175 
 Grand Targhee            9260   51.9    42.5    122    46.1    32.9    140 
 Granite Creek            6770   22.4    10.3    217    36.9    20.4    181 
 Grassy Lake              7265   37.3    30.8    121    57.7    37.7    153 
 Gros Ventre Summit       8750     -M    13.0       *     -M    13.8       *
 Gunsight Pass            9820   24.2    13.7    177    26.3    15.0    175 
 Lewis Lake Divide        7850   46.5    30.6    152    57.6    37.1    155 
 Phillips Bench           8200   39.1    25.3    155    48.2    29.4    164 
 Salt River Summit        7760   17.5     9.2    190    30.0    17.5    171 
 Snake River Station      6920   14.9    11.1    134    37.3    23.7    157 
 Spring Creek Divide      9000   42.1    23.6    178    41.8    25.0    167 
 Thumb Divide             7980   20.7    14.4    144    29.1    19.8    147 
 Togwotee Pass            9580   34.9    24.2    144    40.6    25.9    157 
 Two Ocean Plateau        9240     -M    28.5       *     -M    28.8       *
 Willow Creek             8380   27.9    26.6    105    53.1    35.6    149 
 Younts Peak              8350   24.6    15.2    162    32.2    16.8    192 
                                                -----                  -----
                Basin Index (%)                  148                    160 
 

MADISON-GALLATIN

 Black Bear               8170   48.2    36.9    131    56.4    40.2    140 
 Canyon                   7870   17.5    12.1    145    26.6    17.2    155 
 Madison Plateau          7750   28.1    22.9    123    37.9    27.7    137 
 West Yellowstone         6700    1.8     6.5     28    24.1    15.2    159 
 Whiskey Creek            6800   12.4    15.4     81    27.9    21.4    130 
                                                -----                  -----
                Basin Index (%)                  115                    142 
 

YELLOWSTONE

 Beartooth Lake           9360   34.5    23.6    146    29.5    20.9    141 
 Burnt Mtn                5880     .2      .0       *   15.5    14.5    107 
 Canyon                   7870   17.5    12.1    145    26.6    17.2    155 
 Cole Creek               7850   12.5    16.4     76    10.0    14.8     68 
 Evening Star             9200   39.8    24.6    162    47.0    29.0    162 
 Fisher Creek             9100   45.5    32.8    139    50.0    33.7    148 
 Northeast Entrance       7350    3.7     6.0     62    21.6    13.1    165 
 Parker Peak              9400   39.5    21.2    186    37.0    18.9    196 
 Sylvan Lake              8420   25.4    20.4    125    39.7    23.8    167 
 Thumb Divide             7980   20.7    14.4    144    29.1    19.8    147 
 Two Ocean Plateau        9240     -M    28.5       *     -M    28.8       *
 White Mill               8700   38.8    23.7    164    37.9    25.1    151 
 Wolverine                7650    3.2     6.6     48    22.2    13.0    171 
                                                -----                  -----
                Basin Index (%)                  139                    150 
 

WIND RIVER

 Burroughs Creek          8750   20.6      -M       *   28.1      -M       *
 Castle Creek             8400    8.4      -M       *   16.9      -M       *
 Cold Springs             9630   15.7     4.1    383    20.6    11.1    186 
 Deer Park                9700   34.4    16.3    211    40.5    21.8    186 
 Hobbs Park              10100   31.6    15.1    209    30.1    15.1    199 
 Kirwin                   9550   24.0    10.0    240    27.2    12.7    214 
 Little Warm              9370   18.7    10.0    187    25.6    14.0    183 
 Owl Creek                8975    8.7     3.5    249    14.3     7.0    204 
 South Pass               9040   32.0    15.4    208    30.4    18.8    162 
 St. Lawrence Alt         8620    8.4     5.1    165    18.6    10.1    184 
 Togwotee Pass            9580   34.9    24.2    144    40.6    25.9    157 
 Townsend Creek           8700   17.8     9.1    196    24.5    13.5    181 
                                                -----                  -----
                Basin Index (%)                  201                    182 
 

BIGHORN BASIN

 Bald Mtn.                9380   21.4    20.0    107    18.7    18.4    102 
 Bear Trap Meadow         8200    5.1     2.7    189    11.7     9.6    122 
 Bone Springs Div         9350   21.3    16.2    131    19.3    17.0    114 
 Grave Springs            8550    8.4     9.4     89    10.4    11.9     87 
 Kirwin                   9550   24.0    10.0    240    27.2    12.7    214 
 Marquette                8760   15.6      -M       *   19.5      -M       *
 Middle Powder            7760   10.3    12.4     83     9.8    13.0     75 
 Owl Creek                8975    8.7     3.5    249    14.3     7.0    204 
 Powder River Pass        9480   10.1    10.2     99    15.5    13.9    112 
 Shell Creek              9580   19.2    15.6    123    16.7    15.0    111 
 Timber Creek             7950    7.2     4.4    164    13.0     8.6    151 
                                                -----                  -----
                Basin Index (%)                  130                    123 
 

SHOSHONE RIVER

 Blackwater               9780   39.9    24.0    166    44.3    22.0    201 
 Evening Star             9200   39.8    24.6    162    47.0    29.0    162 
 Marquette                8760   15.6      -M       *   19.5      -M       *
 Sylvan Road              7120     .0     9.2      0    31.7    17.8    178 
 Younts Peak              8350   24.6    15.2    162    32.2    16.8    192 
                                                -----                  -----
                Basin Index (%)                  143                    181 
 

POWDER RIVER

 Bear Trap Meadow         8200    5.1     2.7    189    11.7     9.6    122 
 Cloud Peak Reservoir     9860   18.6    16.0    116    22.2    15.2    146 
 Grave Springs            8550    8.4     9.4     89    10.4    11.9     87 
 Hansen Sawmill           8360   12.3     4.5    273    17.4     9.8    178 
 Middle Powder            7760   10.3    12.4     83     9.8    13.0     75 
 Powder River Pass        9480   10.1    10.2     99    15.5    13.9    112 
 Soldier Park             8720   15.6      -M       *   17.1      -M       *
                                                -----                  -----
                Basin Index (%)                  117                    119 
 

TONGUE RIVER

 Big Goose                7990   12.3     9.2    134    15.9    12.9    123 
 Bone Springs Div         9350   21.3    16.2    131    19.3    17.0    114 
 Burgess Junction         7880   11.1    12.7     87    13.0    13.7     95 
 Dome Lake                8880   16.9    11.8    143    18.3    15.1    121 
 Little Goose             8870   15.2      -M       *   19.8      -M       *
 Sucker Creek             8880   13.6    12.7    107    15.4    16.0     96 
 Tie Creek                6870     .2     4.1      5    14.9    13.1    114 
                                                -----                  -----
                Basin Index (%)                  113                    110 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     1.6      0     8.8    10.6     83 
                                                -----                  -----
                Basin Index (%)                    0                     83 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     3.9      0    10.3    13.3     77 
 North Rapid Creek        6130     .0     3.9      0     8.8    11.3     78 
                                                -----                  -----
                Basin Index (%)                    0                     78 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   24.6    21.4    115    27.5    24.5    112 
 Blackhall Mtn            9820   34.4      -M       *   38.8      -M       *
 Columbine                9160   10.9    20.6     53    28.6    27.2    105 
 Divide Peak              8880   10.9    18.4     59    23.6    23.0    103 
 Joe Wright              10120   17.0    22.5     76    30.5    28.1    109 
 Laprele Creek            8375    6.7     7.7     87    13.5    13.9     97 
 Med Bow                 10500   35.9      -M       *   36.9      -M       *
 North French Creek      10130   24.6    32.1     77    29.4    28.9    102 
 Never Summer            10280   23.3    20.8    112    21.0      -M       *
 Old Battle              10000   36.8    33.2    111    39.4    37.4    105 
 Rawah                    9020    5.3     8.2     65    18.8    15.7    120 
 Sage Creek Basin         7850     -M     4.9       *   17.0    15.3    111 
 Sand Lake               10050   30.5    30.6    100    29.0    27.1    107 
 South Brush Creek        8440     .8     9.7      8    13.3    16.7     80 
 Tower                   10500   39.8    48.5     82    45.6    42.5    107 
 Webber Springs           9250   22.5    21.8    103    34.2    28.6    120 
 Willow Creek Pass        9540   18.2    13.4    136    19.3    14.6    132 
 Zirkel                   9340   23.2    22.6    103    43.4    29.9    145 
                                                -----                  -----
                Basin Index (%)                   89                    111 
 

SWEETWATER

 Deer Park                9700   34.4    16.3    211    40.5    21.8    186 
 Larsen Creek             9000   12.9    10.1    128    24.7      -M       *
 South Pass               9040   32.0    15.4    208    30.4    18.8    162 
                                                -----                  -----
                Basin Index (%)                  190                    175 
 

LOWER N. PLATTE

 Casper Mtn.              7900    9.9    14.3     69    14.6    16.8     87 
 Laprele Creek            8375    6.7     7.7     87    13.5    13.9     97 
 Reno Hill                8400   12.1    14.0     86    16.1    17.4     93 
 Windy Peak               7900    4.4     6.4     69    12.8    11.8    108 
                                                -----                  -----
                Basin Index (%)                   78                     95 
 

LARAMIE RIVER

 Brooklyn Lake           10240   19.7    22.4     88    23.9    23.1    103 
 Cinnabar Park            9574   12.7    19.9     64    23.4    25.7     91 
 Crow Creek               8330    1.5      .4    375*   11.0    12.1     91 
 Deadman Hill            10220   20.5    17.4    118    22.3    19.2    116 
 Rawah                    9020    5.3     8.2     65    18.8    15.7    120 
 Roach                    9700   14.8    16.6     89    22.3    20.9    107 
                                                -----                  -----
                Basin Index (%)                   88                    104 
 

S. PLATTE

 Black Mountain           8920    8.2      -M       *   14.5      -M       *
 Crow Creek               8330    1.5      .4    375*   11.0    12.1     91 
 Deadman Hill            10220   20.5    17.4    118    22.3    19.2    116 
                                                -----                  -----
                Basin Index (%)                  124*                   106 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     3.5      0    17.8    16.2    110 
 Divide Peak              8880   10.9    18.4     59    23.6    23.0    103 
 Elk River                8700    5.5    15.0     37    21.2    21.5     99 
 Little Snake River       8915   21.4    23.8     90    40.1    31.2    129 
 Old Battle              10000   36.8    33.2    111    39.4    37.4    105 
 Sage Creek Basin         7850     -M     4.9       *   17.0    15.3    111 
 Sandstone RS             8150     .1     9.8      1    16.2    19.7     82 
 Whiskey Park             8950   21.7    25.7     84    31.7    29.9    106 
                                                -----                  -----
                Basin Index (%)                   74                    107 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.9    12.4    177    24.6    14.3    172 
 Blind Bull Sum           8650   44.5    24.2    184    37.3    20.4    183 
 East Rim Divide          7930   11.7     9.4    124    21.5    12.3    175 
 Elkhart Park G.S.        9400   19.8    11.9    166    25.2    14.2    177 
 Gros Ventre Summit       8750     -M    13.0       *     -M    13.8       *
 Gunsight Pass            9820   24.2    13.7    177    26.3    15.0    175 
 Kendall R.S.             7740   16.1     7.7    209    29.7    14.8    201 
 Loomis Park              8240   24.5    12.5    196    33.0    18.1    182 
 New Fork Lake            8340   12.9     8.3    155    18.7    11.4    164 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   15.8    10.5    150    28.1    14.9    189 
 Spring Creek Divide      9000   42.1    23.6    178    41.8    25.0    167 
 Triple Peak              8500   35.5    19.2    185    42.5    26.6    160 
                                                -----                  -----
                Basin Index (%)                  175                    176 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    5.0      -M       *   17.3      -M       *
 Buck Pasture             9632   15.4      -M       *   25.0      -M       *
 EF Blacks Fork GS        9360   11.7      -M       *   19.0      -M       *
 Hams Fork                7840   11.0     6.0    183    22.6    12.2    185 
 Hewinta                  9500    6.9     7.6     91    18.9    15.2    124 
 Hickerson Park           9122    5.3     5.2    102    13.6    11.2    121 
 Hole-in-Rock             9168    5.5     5.6     98    14.5    10.7    136 
 Indian Creek             9425   41.1    23.5    175    42.7    23.8    179 
 Kelley R.S.              8180   23.7    12.2    194    31.9    19.1    167 
 Spirit Lk               10235   15.1      -M       *   19.6      -M       *
 Steel Creek Park        10158   20.3    16.3    125    22.9    18.0    127 
                                                -----                  -----
                Basin Index (%)                  149                    152 
 

UPPER BEAR RIVER

 Bear River RS            8777    2.6      -M       *   19.9      -M       *
 Bug Lake                 7987   31.9    16.6    192    35.6    20.6    173 
 Burts Miller Ranch       8000     .0      -M       *   11.1      -M       *
 Chalk Creek #1           9171   32.0    24.5    131    38.4    27.1    142 
 Hayden Fork              9130   14.8    11.2    132    31.4    22.6    139 
 Kelley R.S.              8180   23.7    12.2    194    31.9    19.1    167 
 Lily Lake                9133   11.8    10.2    116    21.5    18.5    116 
 Monte Cristo             8932   36.1    27.3    132    41.8    27.7    151 
 Salt River Summit        7760   17.5     9.2    190    30.0    17.5    171 
                                                -----                  -----
                Basin Index (%)                  151                    151 

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


 -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.