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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 WEDNESDAY: APRIL 12 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   24.5    14.4    170    40.0    21.1    190 
 Black Bear               8170   47.5    36.7    129    54.5    38.5    142 
 Blind Bull Sum           8650   44.0    23.6    186      -M    19.6       *
 Cottonwood Creek         7670   28.5    20.5    139    39.1    24.9    157 
 East Rim Divide          7930   15.7    10.1    155    21.3    11.8    181 
 Grand Targhee            9260   47.3    40.0    118    39.8    31.3    127 
 Granite Creek            6770   25.8    13.3    194    36.3    19.7    184 
 Grassy Lake              7265   37.5    31.4    119    55.6    36.2    154 
 Gros Ventre Summit       8750     -M    12.8       *     -M    13.1       *
 Gunsight Pass            9820   23.9    13.7    174    25.7    14.1    182 
 Lewis Lake Divide        7850   46.7    30.2    155    56.0    35.7    157 
 Phillips Bench           8200   39.0    25.9    151    47.2    28.4    166 
 Salt River Summit        7760   20.0    12.1    165      -M    16.8       *
 Snake River Station      6920   18.4    13.9    132    36.2    22.7    159 
 Spring Creek Divide      9000   41.9    22.9    183    41.2    24.0    172 
 Thumb Divide             7980   22.9    14.6    157    28.3    18.8    151 
 Togwotee Pass            9580   34.2    22.7    151    39.3    24.6    160 
 Two Ocean Plateau        9240     -M    26.7       *     -M    27.5       *
 Willow Creek             8380   28.8    27.5    105    50.7    34.0    149 
 Younts Peak              8350   26.5    14.5    183    31.7    16.0    198 
                                                -----                  -----
                Basin Index (%)                  148                    160 
 

MADISON-GALLATIN

 Black Bear               8170   47.5    36.7    129    54.5    38.5    142 
 Canyon                   7870   18.0    12.3    146    26.1    16.4    159 
 Madison Plateau          7750   27.7    22.2    125    36.7    26.5    138 
 West Yellowstone         6700    5.9     8.6     69    23.5    14.2    165 
 Whiskey Creek            6800   13.4    14.6     92    27.2    20.3    134 
                                                -----                  -----
                Basin Index (%)                  119                    145 
 

YELLOWSTONE

 Beartooth Lake           9360   33.3    21.8    153    28.4    20.0    142 
 Burnt Mtn                5880     .2     2.4      8    15.0    13.3    113 
 Canyon                   7870   18.0    12.3    146    26.1    16.4    159 
 Cole Creek               7850   12.5    15.3     82     9.5    13.5     70 
 Evening Star             9200   38.8    24.2    160    45.4    27.7    164 
 Fisher Creek             9100   43.9    31.6    139    47.7    32.0    149 
 Northeast Entrance       7350    7.6     8.5     89    20.9    12.4    169 
 Parker Peak              9400   36.3    20.1    181    35.1    17.9    196 
 Sylvan Lake              8420   24.7    19.8    125    37.9    22.6    168 
 Thumb Divide             7980   22.9    14.6    157    28.3    18.8    151 
 Two Ocean Plateau        9240     -M    26.7       *     -M    27.5       *
 White Mill               8700   37.2    23.1    161    36.5    24.0    152 
 Wolverine                7650    4.3     9.2     47    21.3    12.3    173 
                                                -----                  -----
                Basin Index (%)                  138                    152 
 

WIND RIVER

 Burroughs Creek          8750   23.2      -M       *   27.8      -M       *
 Castle Creek             8400   10.8      -M       *   16.0      -M       *
 Cold Springs             9630   17.8     6.1    292    20.3    10.3    197 
 Deer Park                9700   33.6    16.2    207    38.5    20.5    188 
 Hobbs Park              10100   30.4    14.8    205    28.8    14.0    206 
 Kirwin                   9550   23.6     9.8    241    25.8    11.8    219 
 Little Warm              9370   19.4    10.3    188    25.3    13.1    193 
 Owl Creek                8975   10.6     5.6    189    13.5     6.3    214 
 South Pass               9040   32.1    15.8    203    29.0    17.8    163 
 St. Lawrence Alt         8620   10.2     6.8    150    17.6     9.3    189 
 Togwotee Pass            9580   34.2    22.7    151    39.3    24.6    160 
 Townsend Creek           8700   18.8    10.0    188    23.6    12.6    187 
                                                -----                  -----
                Basin Index (%)                  195                    187 
 

BIGHORN BASIN

 Bald Mtn.                9380   20.7    19.3    107    17.7    17.4    102 
 Bear Trap Meadow         8200    5.7     4.6    124     9.6     8.8    109 
 Bone Springs Div         9350   20.8    17.0    122    18.6    15.9    117 
 Grave Springs            8550    7.8     9.6     81     8.8    11.0     80 
 Kirwin                   9550   23.6     9.8    241    25.8    11.8    219 
 Marquette                8760   14.7      -M       *   18.2      -M       *
 Middle Powder            7760    9.0    12.4     73     8.6    12.1     71 
 Owl Creek                8975   10.6     5.6    189    13.5     6.3    214 
 Powder River Pass        9480    9.7    10.3     94    14.2    13.0    109 
 Shell Creek              9580   18.8    15.6    121    15.6    14.1    111 
 Timber Creek             7950    8.1     5.1    159    11.9     7.6    157 
                                                -----                  -----
                Basin Index (%)                  123                    122 
 

SHOSHONE RIVER

 Blackwater               9780   38.5    23.3    165    42.6    20.9    204 
 Evening Star             9200   38.8    24.2    160    45.4    27.7    164 
 Marquette                8760   14.7      -M       *   18.2      -M       *
 Sylvan Road              7120    5.7    10.4     55    30.9    16.9    183 
 Younts Peak              8350   26.5    14.5    183    31.7    16.0    198 
                                                -----                  -----
                Basin Index (%)                  151                    185 
 

POWDER RIVER

 Bear Trap Meadow         8200    5.7     4.6    124     9.6     8.8    109 
 Cloud Peak Reservoir     9860   18.3    15.3    120    19.9    13.8    144 
 Grave Springs            8550    7.8     9.6     81     8.8    11.0     80 
 Hansen Sawmill           8360   12.5     6.1    205    15.6     8.9    175 
 Middle Powder            7760    9.0    12.4     73     8.6    12.1     71 
 Powder River Pass        9480    9.7    10.3     94    14.2    13.0    109 
 Soldier Park             8720   16.5      -M       *   15.7      -M       *
                                                -----                  -----
                Basin Index (%)                  108                    113 
 

TONGUE RIVER

 Big Goose                7990   12.6     9.9    127    15.1    12.0    126 
 Bone Springs Div         9350   20.8    17.0    122    18.6    15.9    117 
 Burgess Junction         7880   11.5    12.2     94    12.9    12.8    101 
 Dome Lake                8880   17.2    11.9    145    17.6    14.1    125 
 Little Goose             8870   15.3      -M       *   18.7      -M       *
 Sucker Creek             8880   14.3    12.5    114    15.0    14.9    101 
 Tie Creek                6870    3.7     5.2     71    14.5    12.1    120 
                                                -----                  -----
                Basin Index (%)                  117                    115 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     4.1      0     7.7     9.8     79 
                                                -----                  -----
                Basin Index (%)                    0                     79 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     6.2      0     9.7    12.3     79 
 North Rapid Creek        6130     .0     6.0      0     8.2    10.3     80 
                                                -----                  -----
                Basin Index (%)                    0                     79 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   25.4    21.4    119    26.4    23.4    113 
 Blackhall Mtn            9820   36.4      -M       *   38.2      -M       *
 Columbine                9160   17.4    22.8     76    27.7    26.0    107 
 Divide Peak              8880   15.8    20.3     78    23.3    21.9    106 
 Joe Wright              10120   18.5    21.9     84    28.8    26.5    109 
 Laprele Creek            8375   10.1     9.4    107    12.7    12.9     98 
 Med Bow                 10500   39.2      -M       *   35.8      -M       *
 North French Creek      10130   25.1    31.0     81    27.9    27.4    102 
 Never Summer            10280   21.8    20.5    106    19.6      -M       *
 Old Battle              10000   36.8    32.0    115    38.8    35.6    109 
 Rawah                    9020    8.3    10.2     81    17.5    14.9    117 
 Sage Creek Basin         7850    4.6    10.3     45    16.9    14.9    113 
 Sand Lake               10050   31.1    30.0    104    28.2    25.5    111 
 South Brush Creek        8440    2.1    11.5     18    12.9    15.7     82 
 Tower                   10500   39.3    47.1     83    44.2    40.5    109 
 Webber Springs           9250   25.9    23.4    111    33.9    27.3    124 
 Willow Creek Pass        9540   18.2    12.5    146    18.7    13.8    136 
 Zirkel                   9340   30.9    25.1    123    42.5    29.1    146 
                                                -----                  -----
                Basin Index (%)                   95                    113 
 

SWEETWATER

 Deer Park                9700   33.6    16.2    207    38.5    20.5    188 
 Larsen Creek             9000   16.4    11.1    148    23.6      -M       *
 South Pass               9040   32.1    15.8    203    29.0    17.8    163 
                                                -----                  -----
                Basin Index (%)                  190                    176 
 

LOWER N. PLATTE

 Casper Mtn.              7900   11.7    14.5     81    13.7    15.6     88 
 Laprele Creek            8375   10.1     9.4    107    12.7    12.9     98 
 Reno Hill                8400   13.1    14.2     92    15.3    16.1     95 
 Windy Peak               7900    7.6     7.5    101    11.9    10.9    109 
                                                -----                  -----
                Basin Index (%)                   93                     97 
 

LARAMIE RIVER

 Brooklyn Lake           10240   23.0    22.3    103    23.6    21.7    109 
 Cinnabar Park            9574   16.7    21.4     78    22.6    24.8     91 
 Crow Creek               8330     .0     5.9      0     9.3    11.3     82 
 Deadman Hill            10220   21.4    16.6    129    20.9    17.9    117 
 Rawah                    9020    8.3    10.2     81    17.5    14.9    117 
 Roach                    9700   16.6    16.5    101    21.6    19.7    110 
                                                -----                  -----
                Basin Index (%)                   93                    105 
 

S. PLATTE

 Black Mountain           8920   10.7      -M       *   13.3      -M       *
 Crow Creek               8330     .0     5.9      0     9.3    11.3     82 
 Deadman Hill            10220   21.4    16.6    129    20.9    17.9    117 
                                                -----                  -----
                Basin Index (%)                   95                    103 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     -M     8.0       *   17.0    15.3    111 
 Divide Peak              8880   15.8    20.3     78    23.3    21.9    106 
 Elk River                8700   11.6    18.2     64    20.7    20.5    101 
 Little Snake River       8915   26.2    26.0    101    39.2    30.6    128 
 Old Battle              10000   36.8    32.0    115    38.8    35.6    109 
 Sage Creek Basin         7850    4.6    10.3     45    16.9    14.9    113 
 Sandstone RS             8150    5.5    12.5     44    16.4    18.7     88 
 Whiskey Park             8950   25.3    27.6     92    30.6    28.4    108 
                                                -----                  -----
                Basin Index (%)                   86                    109 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.7    12.9    168    23.5    13.5    174 
 Blind Bull Sum           8650   44.0    23.6    186      -M    19.6       *
 East Rim Divide          7930   15.7    10.1    155    21.3    11.8    181 
 Elkhart Park G.S.        9400   20.0    12.3    163    24.7    13.5    183 
 Gros Ventre Summit       8750     -M    12.8       *     -M    13.1       *
 Gunsight Pass            9820   23.9    13.7    174    25.7    14.1    182 
 Kendall R.S.             7740   19.6    10.7    183    29.6    14.3    207 
 Loomis Park              8240   27.0    13.7    197    32.6    17.4    187 
 New Fork Lake            8340   15.5     9.9    157    18.1    10.9    166 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   18.7    12.2    153    27.9    14.3    195 
 Spring Creek Divide      9000   41.9    22.9    183    41.2    24.0    172 
 Triple Peak              8500   36.7    20.7    177    41.5    25.5    163 
                                                -----                  -----
                Basin Index (%)                  175                    180 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    9.0      -M       *   16.5      -M       *
 Buck Pasture             9632   17.9      -M       *   24.1      -M       *
 EF Blacks Fork GS        9360   14.9      -M       *   17.9      -M       *
 Hams Fork                7840   14.2     9.5    149    22.0    11.5    191 
 Hewinta                  9500    9.9    10.5     94    18.0    14.4    125 
 Hickerson Park           9122    8.8     7.5    117    13.5    10.6    127 
 Hole-in-Rock             9168    7.7     7.1    108    14.0    10.1    139 
 Indian Creek             9425   41.5    24.6    169    41.8    22.8    183 
 Kelley R.S.              8180   26.0    14.2    183    31.2    18.3    170 
 Spirit Lk               10235   16.9      -M       *   19.2      -M       *
 Steel Creek Park        10158   19.8    16.1    123    21.7    17.0    128 
                                                -----                  -----
                Basin Index (%)                  143                    155 
 

UPPER BEAR RIVER

 Bear River RS            8777    8.6      -M       *   19.1      -M       *
 Bug Lake                 7987   33.1    19.1    173    34.8    19.7    177 
 Burts Miller Ranch       8000    2.2      -M       *   10.6      -M       *
 Chalk Creek #1           9171   34.2    24.7    138    37.1    25.8    144 
 Hayden Fork              9130   20.2    14.7    137    30.4    21.5    141 
 Kelley R.S.              8180   26.0    14.2    183    31.2    18.3    170 
 Lily Lake                9133   14.1    12.7    111    20.5    17.6    116 
 Monte Cristo             8932   37.3    27.8    134    40.5    26.5    153 
 Salt River Summit        7760   20.0    12.1    165      -M    16.8       *
                                                -----                  -----
                Basin Index (%)                  148                    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.