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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 THURSDAY: APRIL 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   24.0    14.0    171    40.1    21.2    189 
 Black Bear               8170   45.6    36.6    125    54.5    38.7    141 
 Blind Bull Sum           8650   44.3    23.7    187      -M    19.7       *
 Cottonwood Creek         7670     -M    20.3       *     -M    25.0       *
 East Rim Divide          7930   15.2    10.1    150    21.3    11.9    179 
 Grand Targhee            9260     -M    40.4       *     -M    31.4       *
 Granite Creek            6770   25.0    13.0    192    36.3    19.8    183 
 Grassy Lake              7265   37.6    31.4    120    55.6    36.4    153 
 Gros Ventre Summit       8750     -M    12.9       *     -M    13.2       *
 Gunsight Pass            9820   23.9    13.6    176    25.8    14.1    183 
 Lewis Lake Divide        7850   46.9    30.2    155    56.1    35.8    157 
 Phillips Bench           8200     -M    26.0       *     -M    28.4       *
 Salt River Summit        7760   19.9    11.8    169      -M    16.9       *
 Snake River Station      6920   17.7    13.6    130    36.1    22.7    159 
 Spring Creek Divide      9000   41.9    23.0    182    41.2    24.1    171 
 Thumb Divide             7980   22.2    14.6    152    28.3    18.9    150 
 Togwotee Pass            9580   34.2    22.8    150    39.3    24.7    159 
 Two Ocean Plateau        9240     -M    26.9       *     -M    27.6       *
 Willow Creek             8380     -M    27.2       *     -M    34.2       *
 Younts Peak              8350   26.1    14.6    179    31.7    16.0    198 
                                                -----                  -----
                Basin Index (%)                  155                    164 
 

MADISON-GALLATIN

 Black Bear               8170   45.6    36.6    125    54.5    38.7    141 
 Canyon                   7870   18.0    12.3    146    26.1    16.5    158 
 Madison Plateau          7750   27.8    22.3    125    36.7    26.6    138 
 West Yellowstone         6700    5.7     8.5     67    23.5    14.3    164 
 Whiskey Creek            6800   13.3    14.6     91    27.3    20.5    133 
                                                -----                  -----
                Basin Index (%)                  117                    144 
 

YELLOWSTONE

 Beartooth Lake           9360   33.4    22.0    152    28.5    20.1    142 
 Burnt Mtn                5880     .0     1.7      0    15.0    13.3    113 
 Canyon                   7870   18.0    12.3    146    26.1    16.5    158 
 Cole Creek               7850   12.5    15.4     81     9.6    13.7     70 
 Evening Star             9200   39.0    24.4    160    45.5    27.8    164 
 Fisher Creek             9100   44.1    31.7    139    48.1    32.2    149 
 Northeast Entrance       7350    7.4     8.4     88    20.9    12.5    167 
 Parker Peak              9400   36.6    20.2    181    35.2    18.0    196 
 Sylvan Lake              8420   24.8    19.8    125    37.9    22.7    167 
 Thumb Divide             7980   22.2    14.6    152    28.3    18.9    150 
 Two Ocean Plateau        9240     -M    26.9       *     -M    27.6       *
 White Mill               8700   37.4    23.3    161    36.7    24.1    152 
 Wolverine                7650    4.5     9.1     49    21.5    12.4    173 
                                                -----                  -----
                Basin Index (%)                  138                    152 
 

WIND RIVER

 Burroughs Creek          8750   23.0      -M       *   28.0      -M       *
 Castle Creek             8400   10.6      -M       *   15.9      -M       *
 Cold Springs             9630   17.6     6.0    293    20.4    10.3    198 
 Deer Park                9700   33.5    16.2    207    38.6    20.5    188 
 Hobbs Park              10100   30.5    14.9    205    29.1    14.1    206 
 Kirwin                   9550   22.7     9.9    229    25.9    11.9    218 
 Little Warm              9370   19.2    10.3    186    25.4    13.2    192 
 Owl Creek                8975   10.5     5.4    194    13.5     6.3    214 
 South Pass               9040   31.9    15.8    202    29.0    17.9    162 
 St. Lawrence Alt         8620   10.0     6.7    149    17.5     9.3    188 
 Togwotee Pass            9580   34.2    22.8    150    39.3    24.7    159 
 Townsend Creek           8700   18.6    10.0    186    23.7    12.7    187 
                                                -----                  -----
                Basin Index (%)                  194                    186 
 

BIGHORN BASIN

 Bald Mtn.                9380   20.8    19.3    108    18.1    17.5    103 
 Bear Trap Meadow         8200    5.6     4.6    122     9.7     8.9    109 
 Bone Springs Div         9350   21.0    17.0    124    18.9    16.0    118 
 Grave Springs            8550    7.7     9.6     80     8.8    11.0     80 
 Kirwin                   9550   22.7     9.9    229    25.9    11.9    218 
 Marquette                8760   14.7      -M       *   18.2      -M       *
 Middle Powder            7760    8.9    12.4     72     8.6    12.2     70 
 Owl Creek                8975   10.5     5.4    194    13.5     6.3    214 
 Powder River Pass        9480    9.8    10.3     95    14.4    13.0    111 
 Shell Creek              9580   18.9    15.6    121    15.8    14.2    111 
 Timber Creek             7950    8.0     5.2    154    11.9     7.7    155 
                                                -----                  -----
                Basin Index (%)                  123                    123 
 

SHOSHONE RIVER

 Blackwater               9780   38.7    23.5    165    42.8    21.0    204 
 Evening Star             9200   39.0    24.4    160    45.5    27.8    164 
 Marquette                8760   14.7      -M       *   18.2      -M       *
 Sylvan Road              7120    5.1    10.4     49    31.0    16.9    183 
 Younts Peak              8350   26.1    14.6    179    31.7    16.0    198 
                                                -----                  -----
                Basin Index (%)                  149                    185 
 

POWDER RIVER

 Bear Trap Meadow         8200    5.6     4.6    122     9.7     8.9    109 
 Cloud Peak Reservoir     9860   18.4    15.3    120    20.3    14.0    145 
 Grave Springs            8550    7.7     9.6     80     8.8    11.0     80 
 Hansen Sawmill           8360   12.5     6.1    205    15.7     9.0    174 
 Middle Powder            7760    8.9    12.4     72     8.6    12.2     70 
 Powder River Pass        9480    9.8    10.3     95    14.4    13.0    111 
 Soldier Park             8720   16.3      -M       *   15.8      -M       *
                                                -----                  -----
                Basin Index (%)                  108                    114 
 

TONGUE RIVER

 Big Goose                7990   12.6     9.9    127    15.2    12.0    127 
 Bone Springs Div         9350   21.0    17.0    124    18.9    16.0    118 
 Burgess Junction         7880   11.5    12.2     94    12.9    12.9    100 
 Dome Lake                8880   17.2    12.0    143    17.7    14.2    125 
 Little Goose             8870   15.1      -M       *   18.8      -M       *
 Sucker Creek             8880   14.2    12.6    113    15.1    15.0    101 
 Tie Creek                6870    3.4     5.1     67    14.5    12.1    120 
                                                -----                  -----
                Basin Index (%)                  116                    115 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     3.8      0     7.8     9.9     79 
                                                -----                  -----
                Basin Index (%)                    0                     79 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     5.8      0     9.7    12.4     78 
 North Rapid Creek        6130     .0     5.9      0     8.2    10.3     80 
                                                -----                  -----
                Basin Index (%)                    0                     79 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   25.2    21.5    117    26.4    23.6    112 
 Blackhall Mtn            9820   36.4      -M       *   38.1      -M       *
 Columbine                9160   16.2    22.6     72    27.6    26.2    105 
 Divide Peak              8880   15.7    20.3     77    23.3    22.0    106 
 Joe Wright              10120   18.3    22.0     83    28.8    26.7    108 
 Laprele Creek            8375    9.6     9.3    103    12.7    13.0     98 
 Med Bow                 10500   38.4      -M       *   35.7      -M       *
 North French Creek      10130   25.1    31.2     80    27.9    27.5    101 
 Never Summer            10280   21.7    20.5    106    19.6      -M       *
 Old Battle              10000   36.7    32.1    114    38.9    35.8    109 
 Rawah                    9020    7.6    10.0     76    17.5    15.0    117 
 Sage Creek Basin         7850    3.8     9.9     38    16.9    15.0    113 
 Sand Lake               10050   31.1    30.1    103    28.2    25.6    110 
 South Brush Creek        8440     -M    11.3       *   13.0    15.8     82 
 Tower                   10500   39.3    47.2     83    44.2    40.8    108 
 Webber Springs           9250   25.9    23.4    111    33.8    27.4    123 
 Willow Creek Pass        9540   18.1    12.6    144    18.7    13.9    135 
 Zirkel                   9340   31.1    24.7    126    42.5    29.1    146 
                                                -----                  -----
                Basin Index (%)                   96                    112 
 

SWEETWATER

 Deer Park                9700   33.5    16.2    207    38.6    20.5    188 
 Larsen Creek             9000   16.0    11.0    145    23.6      -M       *
 South Pass               9040   31.9    15.8    202    29.0    17.9    162 
                                                -----                  -----
                Basin Index (%)                  189                    176 
 

LOWER N. PLATTE

 Casper Mtn.              7900   11.6    14.5     80    13.6    15.7     87 
 Laprele Creek            8375    9.6     9.3    103    12.7    13.0     98 
 Reno Hill                8400   13.0    14.2     92    15.4    16.2     95 
 Windy Peak               7900    7.3     7.5     97    11.9    11.0    108 
                                                -----                  -----
                Basin Index (%)                   91                     96 
 

LARAMIE RIVER

 Brooklyn Lake           10240   22.8    22.3    102    23.5    21.8    108 
 Cinnabar Park            9574   16.5    21.3     77    22.6    24.8     91 
 Crow Creek               8330     .0     5.5      0     9.3    11.4     82 
 Deadman Hill            10220   21.5    16.6    130    20.9    18.0    116 
 Rawah                    9020    7.6    10.0     76    17.5    15.0    117 
 Roach                    9700   16.5    16.5    100    21.6    19.9    109 
                                                -----                  -----
                Basin Index (%)                   92                    104 
 

S. PLATTE

 Black Mountain           8920   10.3      -M       *   13.3      -M       *
 Crow Creek               8330     .0     5.5      0     9.3    11.4     82 
 Deadman Hill            10220   21.5    16.6    130    20.9    18.0    116 
                                                -----                  -----
                Basin Index (%)                   97                    103 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     -M     7.7       *   16.9    15.4    110 
 Divide Peak              8880   15.7    20.3     77    23.3    22.0    106 
 Elk River                8700   11.7    17.8     66    20.6    20.6    100 
 Little Snake River       8915   25.8    26.0     99    39.2    30.7    128 
 Old Battle              10000   36.7    32.1    114    38.9    35.8    109 
 Sage Creek Basin         7850    3.8     9.9     38    16.9    15.0    113 
 Sandstone RS             8150    4.4    12.4     35    16.4    18.8     87 
 Whiskey Park             8950   25.0    27.5     91    30.6    28.5    107 
                                                -----                  -----
                Basin Index (%)                   84                    109 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.3    12.9    165    23.6    13.6    174 
 Blind Bull Sum           8650   44.3    23.7    187      -M    19.7       *
 East Rim Divide          7930   15.2    10.1    150    21.3    11.9    179 
 Elkhart Park G.S.        9400   20.1    12.2    165    24.7    13.6    182 
 Gros Ventre Summit       8750     -M    12.9       *     -M    13.2       *
 Gunsight Pass            9820   23.9    13.6    176    25.8    14.1    183 
 Kendall R.S.             7740   19.3    10.4    186    29.5    14.3    206 
 Loomis Park              8240   26.6    13.7    194    32.7    17.5    187 
 New Fork Lake            8340   15.3     9.8    156    18.2    10.9    167 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   18.2    12.0    152    27.9    14.4    194 
 Spring Creek Divide      9000   41.9    23.0    182    41.2    24.1    171 
 Triple Peak              8500   36.3    20.3    179    41.6    25.6    162 
                                                -----                  -----
                Basin Index (%)                  175                    179 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869     -M      -M       *     -M      -M       *
 Buck Pasture             9632   17.9      -M       *   24.0      -M       *
 EF Blacks Fork GS        9360   14.5      -M       *   17.9      -M       *
 Hams Fork                7840   13.5     9.2    147    22.0    11.6    190 
 Hewinta                  9500    9.1    10.3     88    18.0    14.5    124 
 Hickerson Park           9122    8.6     7.2    119    13.5    10.6    127 
 Hole-in-Rock             9168    7.3     7.1    103    14.2    10.1    141 
 Indian Creek             9425   41.2    24.3    170    41.8    22.9    183 
 Kelley R.S.              8180   26.1    14.0    186    31.2    18.3    170 
 Spirit Lk               10235   16.4      -M       *   19.2      -M       *
 Steel Creek Park        10158   19.6    16.1    122    21.7    17.1    127 
                                                -----                  -----
                Basin Index (%)                  142                    155 
 

UPPER BEAR RIVER

 Bear River RS            8777    7.7      -M       *   19.0      -M       *
 Bug Lake                 7987   33.1    19.2    172    34.8    19.8    176 
 Burts Miller Ranch       8000    1.2      -M       *   10.7      -M       *
 Chalk Creek #1           9171   34.4    24.8    139    37.1    25.9    143 
 Hayden Fork              9130   18.6    14.4    129    30.4    21.6    141 
 Kelley R.S.              8180   26.1    14.0    186    31.2    18.3    170 
 Lily Lake                9133   13.4    12.7    106    20.5    17.7    116 
 Monte Cristo             8932   37.8    27.8    136    40.5    26.5    153 
 Salt River Summit        7760   19.9    11.8    169      -M    16.9       *
                                                -----                  -----
                Basin Index (%)                  147                    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.