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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 MONDAY: APRIL 24 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   20.3    11.0    185    40.8    22.0    185 
 Black Bear               8170   48.7    36.9    132    57.0    40.5    141 
 Blind Bull Sum           8650   45.0    24.3    185    37.4    20.6    182 
 Cottonwood Creek         7670   27.0    17.5    154    40.6    26.3    154 
 East Rim Divide          7930   10.2     9.2    111    21.6    12.4    174 
 Grand Targhee            9260   52.2    42.9    122    46.2    33.2    139 
 Granite Creek            6770   21.7     9.8    221    37.0    20.5    180 
 Grassy Lake              7265   37.3    30.4    123    57.9    38.0    152 
 Gros Ventre Summit       8750   20.3    12.7    160    25.3    14.0    181 
 Gunsight Pass            9820   24.3    13.6    179    26.3    15.3    172 
 Lewis Lake Divide        7850   46.7    30.7    152    57.7    37.4    154 
 Phillips Bench           8200   39.0    25.3    154    48.3    29.6    163 
 Salt River Summit        7760   16.9     8.7    194    30.3    17.7    171 
 Snake River Station      6920   13.5    10.5    129    37.4    23.9    156 
 Spring Creek Divide      9000   42.1    23.6    178    41.9    25.3    166 
 Thumb Divide             7980   19.4    14.2    137    29.3    20.1    146 
 Togwotee Pass            9580   35.0    24.4    143    40.8    26.1    156 
 Two Ocean Plateau        9240     -M    28.8       *     -M    29.0       *
 Willow Creek             8380   27.7    26.1    106    53.1    36.1    147 
 Younts Peak              8350   24.0    15.1    159    32.4    16.9    192 
                                                -----                  -----
                Basin Index (%)                  148                    160 
 

MADISON-GALLATIN

 Black Bear               8170   48.7    36.9    132    57.0    40.5    141 
 Canyon                   7870   17.2    11.8    146    26.8    17.3    155 
 Madison Plateau          7750   28.7    22.7    126    38.5    27.9    138 
 West Yellowstone         6700     .0     5.6      0    24.6    15.4    160 
 Whiskey Creek            6800   12.3    15.4     80    28.2    21.6    131 
                                                -----                  -----
                Basin Index (%)                  116                    143 
 

YELLOWSTONE

 Beartooth Lake           9360   34.6    23.6    147    29.8    21.1    141 
 Burnt Mtn                5880     .1      .0       *   15.5    14.8    105 
 Canyon                   7870   17.2    11.8    146    26.8    17.3    155 
 Cole Creek               7850   12.3    16.3     75    10.1    15.1     67 
 Evening Star             9200   40.1    24.4    164    47.1    29.3    161 
 Fisher Creek             9100   46.1    33.1    139    50.2    34.0    148 
 Northeast Entrance       7350    3.3     5.4     61    21.9    13.2    166 
 Parker Peak              9400   39.8    21.6    184    37.4    19.2    195 
 Sylvan Lake              8420   25.3    20.3    125    39.9    24.1    166 
 Thumb Divide             7980   19.4    14.2    137    29.3    20.1    146 
 Two Ocean Plateau        9240     -M    28.8       *     -M    29.0       *
 White Mill               8700   39.4    23.8    166    38.1    25.3    151 
 Wolverine                7650    2.8     5.8     48    22.3    13.1    170 
                                                -----                  -----
                Basin Index (%)                  140                    149 
 

WIND RIVER

 Burroughs Creek          8750   20.1      -M       *   28.3      -M       *
 Castle Creek             8400    8.1      -M       *   16.9      -M       *
 Cold Springs             9630   15.1     3.4    444    20.8    11.5    181 
 Deer Park                9700   34.3    16.3    210    40.6    22.4    181 
 Hobbs Park              10100   31.7    15.5    205    31.1    15.5    201 
 Kirwin                   9550   24.1    10.1    239    27.3    12.9    212 
 Little Warm              9370   18.5     9.7    191    25.8    14.3    180 
 Owl Creek                8975    8.4     3.0    280    14.3     7.2    199 
 South Pass               9040   31.8    15.3    208    30.6    19.2    159 
 St. Lawrence Alt         8620    7.8     5.1    153    18.6    10.5    177 
 Togwotee Pass            9580   35.0    24.4    143    40.8    26.1    156 
 Townsend Creek           8700   17.5     8.9    197    25.0    13.9    180 
                                                -----                  -----
                Basin Index (%)                  201                    179 
 

BIGHORN BASIN

 Bald Mtn.                9380   21.3    20.2    105    18.9    18.6    102 
 Bear Trap Meadow         8200    4.8     2.2    218    11.9     9.8    121 
 Bone Springs Div         9350   21.4    16.4    130    19.5    17.2    113 
 Grave Springs            8550    8.4     9.3     90    10.4    12.1     86 
 Kirwin                   9550   24.1    10.1    239    27.3    12.9    212 
 Marquette                8760   15.4      -M       *   19.7      -M       *
 Middle Powder            7760   10.1    12.3     82    10.1    13.2     77 
 Owl Creek                8975    8.4     3.0    280    14.3     7.2    199 
 Powder River Pass        9480   10.0    10.3     97    15.7    14.1    111 
 Shell Creek              9580   19.2    15.8    122    16.8    15.2    111 
 Timber Creek             7950    6.7     3.9    172    13.0     8.8    148 
                                                -----                  -----
                Basin Index (%)                  130                    122 
 

SHOSHONE RIVER

 Blackwater               9780   40.2    24.3    165    44.5    22.3    200 
 Evening Star             9200   40.1    24.4    164    47.1    29.3    161 
 Marquette                8760   15.4      -M       *   19.7      -M       *
 Sylvan Road              7120     .0     8.6      0    31.7    17.9    177 
 Younts Peak              8350   24.0    15.1    159    32.4    16.9    192 
                                                -----                  -----
                Basin Index (%)                  144                    180 
 

POWDER RIVER

 Bear Trap Meadow         8200    4.8     2.2    218    11.9     9.8    121 
 Cloud Peak Reservoir     9860   17.9    16.2    110    22.6    15.4    147 
 Grave Springs            8550    8.4     9.3     90    10.4    12.1     86 
 Hansen Sawmill           8360   12.0     4.4    273    17.5    10.0    175 
 Middle Powder            7760   10.1    12.3     82    10.1    13.2     77 
 Powder River Pass        9480   10.0    10.3     97    15.7    14.1    111 
 Soldier Park             8720   15.2      -M       *   17.2      -M       *
                                                -----                  -----
                Basin Index (%)                  116                    118 
 

TONGUE RIVER

 Big Goose                7990   12.0     9.1    132    16.2    13.2    123 
 Bone Springs Div         9350   21.4    16.4    130    19.5    17.2    113 
 Burgess Junction         7880   10.9    12.5     87    13.1    13.9     94 
 Dome Lake                8880   16.8    11.8    142    18.5    15.3    121 
 Little Goose             8870   14.8      -M       *   19.9      -M       *
 Sucker Creek             8880   13.4    12.7    106    15.5    16.2     96 
 Tie Creek                6870     .1     3.8      3    14.8    13.4    110 
                                                -----                  -----
                Basin Index (%)                  113                    109 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     1.1      0     9.0    10.8     83 
                                                -----                  -----
                Basin Index (%)                    0                     83 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     3.8      0    10.5    13.5     78 
 North Rapid Creek        6130     .0     3.8      0     8.9    11.5     77 
                                                -----                  -----
                Basin Index (%)                    0                     78 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   24.4    21.6    113    27.6    25.2    110 
 Blackhall Mtn            9820   34.5      -M       *   39.3      -M       *
 Columbine                9160   10.7    20.7     52    28.9    27.5    105 
 Divide Peak              8880   10.6    18.2     58    23.9    23.3    103 
 Joe Wright              10120   17.0    23.0     74    30.5    28.5    107 
 Laprele Creek            8375    6.2     7.3     85    13.9    14.2     98 
 Med Bow                 10500   36.3      -M       *   37.1      -M       *
 North French Creek      10130   24.6    32.4     76    29.8    29.3    102 
 Never Summer            10280   23.3    20.9    111    21.0      -M       *
 Old Battle              10000   37.0    33.8    109    39.7    37.7    105 
 Rawah                    9020    4.7     8.0     59    18.9    16.4    115 
 Sage Creek Basin         7850     -M     3.5       *   17.1    15.5    110 
 Sand Lake               10050   30.8    30.9    100    29.3    27.6    106 
 South Brush Creek        8440     .6     9.9      6    14.0    16.9     83 
 Tower                   10500   40.4    49.1     82    46.0    43.1    107 
 Webber Springs           9250   21.6    21.9     99    34.4    28.9    119 
 Willow Creek Pass        9540   18.0    13.6    132    19.4    14.9    130 
 Zirkel                   9340   22.9    22.5    102    43.6    30.2    144 
                                                -----                  -----
                Basin Index (%)                   88                    110 
 

SWEETWATER

 Deer Park                9700   34.3    16.3    210    40.6    22.4    181 
 Larsen Creek             9000   12.8     9.9    129    24.8      -M       *
 South Pass               9040   31.8    15.3    208    30.6    19.2    159 
                                                -----                  -----
                Basin Index (%)                  190                    171 
 

LOWER N. PLATTE

 Casper Mtn.              7900    9.8    14.2     69    14.9    17.0     88 
 Laprele Creek            8375    6.2     7.3     85    13.9    14.2     98 
 Reno Hill                8400   11.9    13.9     86    16.5    17.8     93 
 Windy Peak               7900    4.1     6.2     66    13.1    12.2    107 
                                                -----                  -----
                Basin Index (%)                   77                     95 
 

LARAMIE RIVER

 Brooklyn Lake           10240   19.6    22.7     86    24.3    23.5    103 
 Cinnabar Park            9574   12.3    19.9     62    23.5    26.0     90 
 Crow Creek               8330     .5      .0       *   11.0    12.6     87 
 Deadman Hill            10220   20.2    17.9    113    22.4    19.6    114 
 Rawah                    9020    4.7     8.0     59    18.9    16.4    115 
 Roach                    9700   14.4    16.7     86    22.4    21.3    105 
                                                -----                  -----
                Basin Index (%)                   84                    103 
 

S. PLATTE

 Black Mountain           8920    7.8      -M       *   14.6      -M       *
 Crow Creek               8330     .5      .0       *   11.0    12.6     87 
 Deadman Hill            10220   20.2    17.9    113    22.4    19.6    114 
                                                -----                  -----
                Basin Index (%)                  116*                   104 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     2.4      0    18.0    16.4    110 
 Divide Peak              8880   10.6    18.2     58    23.9    23.3    103 
 Elk River                8700    4.2    14.7     29    21.2    21.8     97 
 Little Snake River       8915   21.3    23.5     91    40.5    31.5    129 
 Old Battle              10000   37.0    33.8    109    39.7    37.7    105 
 Sage Creek Basin         7850     -M     3.5       *   17.1    15.5    110 
 Sandstone RS             8150     -M     9.2       *   16.7    20.0     84 
 Whiskey Park             8950   22.2    25.6     87    32.0    30.3    106 
                                                -----                  -----
                Basin Index (%)                   81                    106 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.8    12.2    179    24.8    14.5    171 
 Blind Bull Sum           8650   45.0    24.3    185    37.4    20.6    182 
 East Rim Divide          7930   10.2     9.2    111    21.6    12.4    174 
 Elkhart Park G.S.        9400   19.8    11.8    168    25.2    14.3    176 
 Gros Ventre Summit       8750   20.3    12.7    160    25.3    14.0    181 
 Gunsight Pass            9820   24.3    13.6    179    26.3    15.3    172 
 Kendall R.S.             7740   15.2     7.0    217    29.8    14.9    200 
 Loomis Park              8240   23.5    12.1    194    33.1    18.2    182 
 New Fork Lake            8340   12.2     7.7    158    18.9    11.5    164 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   16.0    10.2    157    28.2    15.1    187 
 Spring Creek Divide      9000   42.1    23.6    178    41.9    25.3    166 
 Triple Peak              8500   34.8    19.1    182    42.5    26.8    159 
                                                -----                  -----
                Basin Index (%)                  174                    175 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    4.4      -M       *   17.5      -M       *
 Buck Pasture             9632   15.2      -M       *   25.2      -M       *
 EF Blacks Fork GS        9360   11.2      -M       *   19.3      -M       *
 Hams Fork                7840   10.0     5.3    189    22.6    12.4    182 
 Hewinta                  9500    6.0     7.2     83    19.2    15.4    125 
 Hickerson Park           9122    4.1     5.1     80    13.9    11.5    121 
 Hole-in-Rock             9168    4.6     5.3     87    14.7    10.9    135 
 Indian Creek             9425   41.2    23.6    175    42.8    24.1    178 
 Kelley R.S.              8180     -M    11.9       *     -M    19.3       *
 Spirit Lk               10235   14.6      -M       *   19.8      -M       *
 Steel Creek Park        10158   20.4    16.5    124    23.2    18.2    127 
                                                -----                  -----
                Basin Index (%)                  137                    147 
 

UPPER BEAR RIVER

 Bear River RS            8777     -M      -M       *     -M      -M       *
 Bug Lake                 7987   31.5    16.2    194    35.7    20.8    172 
 Burts Miller Ranch       8000     .0      -M       *   11.2      -M       *
 Chalk Creek #1           9171   32.3    24.6    131    38.5    27.3    141 
 Hayden Fork              9130   13.4    10.9    123    31.7    22.8    139 
 Kelley R.S.              8180     -M    11.9       *     -M    19.3       *
 Lily Lake                9133   11.4    10.0    114    21.6    18.7    116 
 Monte Cristo             8932   36.3    27.3    133    41.8    28.0    149 
 Salt River Summit        7760   16.9     8.7    194    30.3    17.7    171 
                                                -----                  -----
                Basin Index (%)                  145                    148 

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


 -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.