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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 TUESDAY: MARCH 21 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   24.3    14.7    165    37.6    19.1    197 
 Black Bear               8170   44.2    32.7    135    49.6    34.7    143 
 Blind Bull Sum           8650   40.8    20.6    198      -M    17.7       *
 Cottonwood Creek         7670   25.3    20.1    126    34.5    22.0    157 
 East Rim Divide          7930   17.6     9.6    183    19.8    10.6    187 
 Grand Targhee            9260   41.1    33.1    124    37.5    27.2    138 
 Granite Creek            6770   29.0    14.9    195    34.5    18.2    190 
 Grassy Lake              7265     -M    29.4       *   50.7    32.8    155 
 Gros Ventre Summit       8750     -M    11.7       *     -M    11.5       *
 Gunsight Pass            9820   19.8    12.1    164    22.4    12.2    184 
 Lewis Lake Divide        7850   40.0    27.9    143    51.7    32.2    161 
 Phillips Bench           8200   34.2    22.5    152    44.2    25.4    174 
 Salt River Summit        7760   19.5    12.1    161    26.9    15.0    179 
 Snake River Station      6920   19.6    15.3    128    33.4    20.5    163 
 Spring Creek Divide      9000   36.8    21.3    173    37.1    21.5    173 
 Thumb Divide             7980   22.2    14.2    156    26.4    16.6    159 
 Togwotee Pass            9580   30.9    20.7    149    35.5    21.8    163 
 Two Ocean Plateau        9240     -M    24.1       *     -M    24.5       *
 Willow Creek             8380   29.6    25.4    117    45.5    30.1    151 
 Younts Peak              8350   26.6    13.5    197    29.7    14.2    209 
                                                -----                  -----
                Basin Index (%)                  152                    165 
 

MADISON-GALLATIN

 Black Bear               8170   44.2    32.7    135    49.6    34.7    143 
 Canyon                   7870   16.9    11.8    143    24.2    14.6    166 
 Madison Plateau          7750   25.7    20.1    128    33.5    23.8    141 
 West Yellowstone         6700   10.6     9.9    107    21.7    12.8    170 
 Whiskey Creek            6800   14.0    14.2     99    24.7    18.2    136 
                                                -----                  -----
                Basin Index (%)                  126                    148 
 

YELLOWSTONE

 Beartooth Lake           9360   30.7    19.5    157    26.0    17.8    146 
 Burnt Mtn                5880    2.8     4.6     61    12.4    11.0    113 
 Canyon                   7870   16.9    11.8    143    24.2    14.6    166 
 Cole Creek               7850    9.6    12.1     79     6.7    10.8     62 
 Evening Star             9200   36.4    22.4    162    41.7    24.6    170 
 Fisher Creek             9100   41.2    28.3    146    44.0    28.7    153 
 Northeast Entrance       7350   10.6     9.1    116    19.1    11.0    174 
 Parker Peak              9400   31.5    17.7    178    32.1    15.7    204 
 Sylvan Lake              8420   22.7    18.2    125    35.0    20.1    174 
 Thumb Divide             7980   22.2    14.2    156    26.4    16.6    159 
 Two Ocean Plateau        9240     -M    24.1       *     -M    24.5       *
 White Mill               8700   32.8    20.0    164    33.6    21.3    158 
 Wolverine                7650   11.2     8.9    126    20.1    11.0    183 
                                                -----                  -----
                Basin Index (%)                  144                    158 
 

WIND RIVER

 Burroughs Creek          8750   23.7      -M       *   25.5      -M       *
 Castle Creek             8400   11.4      -M       *   14.5      -M       *
 Cold Springs             9630   11.8     6.4    184    14.9     8.6    173 
 Deer Park                9700   27.0    13.5    200    32.2    17.3    186 
 Hobbs Park              10100   21.8    11.9    183    20.4    11.2    182 
 Kirwin                   9550   19.0     8.4    226    21.3    10.0    213 
 Little Warm              9370   15.8     9.3    170    21.4    11.2    191 
 Owl Creek                8975    6.8     4.6    148     9.1     5.0    182 
 South Pass               9040   25.4    14.0    181    23.8    15.5    154 
 St. Lawrence Alt         8620    5.5     6.2     89    12.0     7.6    158 
 Togwotee Pass            9580   30.9    20.7    149    35.5    21.8    163 
 Townsend Creek           8700   11.8     8.3    142    15.9    10.2    156 
                                                -----                  -----
                Basin Index (%)                  170                    174 
 

BIGHORN BASIN

 Bald Mtn.                9380   17.1    16.5    104    14.7    15.0     98 
 Bear Trap Meadow         8200    4.5     5.1     88     6.2     7.2     86 
 Bone Springs Div         9350   15.9    14.2    112    14.9    13.5    110 
 Grave Springs            8550    5.8     8.2     71     6.0     9.0     67 
 Kirwin                   9550   19.0     8.4    226    21.3    10.0    213 
 Marquette                8760    7.2      -M       *   11.6      -M       *
 Middle Powder            7760    6.0     9.9     61     6.1    10.1     60 
 Owl Creek                8975    6.8     4.6    148     9.1     5.0    182 
 Powder River Pass        9480    6.9     9.2     75    10.5    10.9     96 
 Shell Creek              9580   14.8    12.9    115    11.8    11.9     99 
 Timber Creek             7950    4.5     4.2    107     7.0     6.2    113 
                                                -----                  -----
                Basin Index (%)                  109                    109 
 

SHOSHONE RIVER

 Blackwater               9780   35.8    20.9    171    39.4    18.2    216 
 Evening Star             9200   36.4    22.4    162    41.7    24.6    170 
 Marquette                8760    7.2      -M       *   11.6      -M       *
 Sylvan Road              7120   13.1    10.5    125    29.4    15.2    193 
 Younts Peak              8350   26.6    13.5    197    29.7    14.2    209 
                                                -----                  -----
                Basin Index (%)                  166                    194 
 

POWDER RIVER

 Bear Trap Meadow         8200    4.5     5.1     88     6.2     7.2     86 
 Cloud Peak Reservoir     9860   11.8    13.0     91    13.1    11.3    116 
 Grave Springs            8550    5.8     8.2     71     6.0     9.0     67 
 Hansen Sawmill           8360    7.4     5.7    130     9.5     7.2    132 
 Middle Powder            7760    6.0     9.9     61     6.1    10.1     60 
 Powder River Pass        9480    6.9     9.2     75    10.5    10.9     96 
 Soldier Park             8720   11.2      -M       *    9.4      -M       *
                                                -----                  -----
                Basin Index (%)                   83                     92 
 

TONGUE RIVER

 Big Goose                7990    8.2     7.9    104     9.4     9.3    101 
 Bone Springs Div         9350   15.9    14.2    112    14.9    13.5    110 
 Burgess Junction         7880    8.1     9.6     84     9.1    10.6     86 
 Dome Lake                8880   12.4    10.3    120    12.2    11.6    105 
 Little Goose             8870    9.0      -M       *   11.9      -M       *
 Sucker Creek             8880    9.8    10.9     90     9.8    12.3     80 
 Tie Creek                6870    2.8     5.0     56     9.9     9.8    101 
                                                -----                  -----
                Basin Index (%)                   99                     97 
 

BELLE FOURCHE

 Cole Canyon              5910    1.5     5.5     27     6.4     7.9     81 
                                                -----                  -----
                Basin Index (%)                   27                     81 
 

CHEYENNE RIVER BASIN

 Blind Park               6890    2.4     7.2     33     7.9    10.5     75 
 North Rapid Creek        6130    3.5     6.5     54     6.7     8.6     78 
                                                -----                  -----
                Basin Index (%)                   43                     76 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   23.0    18.1    127    23.6    19.8    119 
 Blackhall Mtn            9820   34.2      -M       *   35.3      -M       *
 Columbine                9160   21.9    22.0    100    26.1    23.1    113 
 Divide Peak              8880   16.6    17.7     94    21.0    19.2    109 
 Joe Wright              10120   16.9    19.2     88    25.6    23.0    111 
 Laprele Creek            8375   10.4     9.2    113    10.6    10.9     97 
 Med Bow                 10500   37.3      -M       *   32.5      -M       *
 North French Creek      10130   23.2    25.5     91    25.2    23.8    106 
 Never Summer            10280   21.0    17.9    117    17.3      -M       *
 Old Battle              10000   35.4    26.6    133    36.4    31.6    115 
 Rawah                    9020    9.9     9.6    103    15.1    12.3    123 
 Sage Creek Basin         7850   10.3    11.5     90    15.2    13.0    117 
 Sand Lake               10050   28.3    24.9    114    25.5    21.8    117 
 South Brush Creek        8440    7.6    11.2     68    11.7    13.4     87 
 Tower                   10500   39.0    40.2     97    41.8    35.9    116 
 Webber Springs           9250   25.0    21.2    118    31.6    24.0    132 
 Willow Creek Pass        9540   16.3    11.0    148    17.1    11.8    145 
 Zirkel                   9340   36.7    25.7    143    40.2    25.5    158 
                                                -----                  -----
                Basin Index (%)                  110                    119 
 

SWEETWATER

 Deer Park                9700   27.0    13.5    200    32.2    17.3    186 
 Larsen Creek             9000   16.5    11.2    147    21.0      -M       *
 South Pass               9040   25.4    14.0    181    23.8    15.5    154 
                                                -----                  -----
                Basin Index (%)                  178                    171 
 

LOWER N. PLATTE

 Casper Mtn.              7900    9.9    12.3     80    10.4    12.9     81 
 Laprele Creek            8375   10.4     9.2    113    10.6    10.9     97 
 Reno Hill                8400   10.6    12.1     88    11.8    13.1     90 
 Windy Peak               7900    8.6     7.2    119    10.1     9.2    110 
                                                -----                  -----
                Basin Index (%)                   97                     93 
 

LARAMIE RIVER

 Brooklyn Lake           10240   24.1    17.8    135    21.7    18.6    117 
 Cinnabar Park            9574   17.1    18.2     94    20.8    21.5     97 
 Crow Creek               8330    3.0     6.9     43     8.2     8.9     92 
 Deadman Hill            10220   19.2    14.0    137    18.2    15.1    121 
 Rawah                    9020    9.9     9.6    103    15.1    12.3    123 
 Roach                    9700   15.1    14.1    107    18.4    17.0    108 
                                                -----                  -----
                Basin Index (%)                  110                    110 
 

S. PLATTE

 Black Mountain           8920    9.1      -M       *   10.5      -M       *
 Crow Creek               8330    3.0     6.9     43     8.2     8.9     92 
 Deadman Hill            10220   19.2    14.0    137    18.2    15.1    121 
                                                -----                  -----
                Basin Index (%)                  106                    110 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440    5.9    11.4     52    15.6    13.7    114 
 Divide Peak              8880   16.6    17.7     94    21.0    19.2    109 
 Elk River                8700   15.8    17.4     91    19.1    18.0    106 
 Little Snake River       8915   27.6    21.2    130    36.8    26.6    138 
 Old Battle              10000   35.4    26.6    133    36.4    31.6    115 
 Sage Creek Basin         7850   10.3    11.5     90    15.2    13.0    117 
 Sandstone RS             8150   10.6    12.4     85    15.2    16.8     90 
 Whiskey Park             8950   25.5    24.4    105    28.3    25.1    113 
                                                -----                  -----
                Basin Index (%)                  104                    114 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   19.6    11.7    168    21.6    11.9    182 
 Blind Bull Sum           8650   40.8    20.6    198      -M    17.7       *
 East Rim Divide          7930   17.6     9.6    183    19.8    10.6    187 
 Elkhart Park G.S.        9400   17.6    10.8    163    22.1    11.9    186 
 Gros Ventre Summit       8750     -M    11.7       *     -M    11.5       *
 Gunsight Pass            9820   19.8    12.1    164    22.4    12.2    184 
 Kendall R.S.             7740   21.6    11.3    191    27.6    13.0    212 
 Loomis Park              8240   26.0    13.4    194    30.6    15.6    196 
 New Fork Lake            8340   15.9     9.3    171    16.8     9.7    173 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   18.1    11.1    163    25.5    12.8    199 
 Spring Creek Divide      9000   36.8    21.3    173    37.1    21.5    173 
 Triple Peak              8500   34.5    19.6    176    37.7    22.8    165 
                                                -----                  -----
                Basin Index (%)                  178                    184 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    8.5      -M       *   13.6      -M       *
 Buck Pasture             9632   16.4      -M       *   20.7      -M       *
 EF Blacks Fork GS        9360   13.7      -M       *   14.2      -M       *
 Hams Fork                7840   14.0    10.4    135    18.7    10.2    183 
 Hewinta                  9500    7.1    10.0     71    14.3    12.4    115 
 Hickerson Park           9122    6.2     6.7     93     8.4     9.0     93 
 Hole-in-Rock             9168    4.7     6.7     70     9.1     8.4    108 
 Indian Creek             9425   37.0    21.5    172      -M    20.2       *
 Kelley R.S.              8180   24.3    13.5    180    28.4    16.3    174 
 Spirit Lk               10235   12.2      -M       *   14.7      -M       *
 Steel Creek Park        10158   15.2    13.5    113    17.1    14.4    119 
                                                -----                  -----
                Basin Index (%)                  132                    136 
 

UPPER BEAR RIVER

 Bear River RS            8777    8.6      -M       *   15.4      -M       *
 Bug Lake                 7987   29.5    16.8    176    30.0    17.5    171 
 Burts Miller Ranch       8000    3.6      -M       *    8.5      -M       *
 Chalk Creek #1           9171   30.6    21.4    143    32.0    22.3    143 
 Hayden Fork              9130   18.5    14.4    128    26.7    18.7    143 
 Kelley R.S.              8180   24.3    13.5    180    28.4    16.3    174 
 Lily Lake                9133   11.3    11.4     99    17.0    15.1    113 
 Monte Cristo             8932   32.4    24.6    132    34.7    23.3    149 
 Salt River Summit        7760   19.5    12.1    161    26.9    15.0    179 
                                                -----                  -----
                Basin Index (%)                  145                    153 

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


 -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.