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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: FEBRUARY 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   22.8    13.0    175    31.1    16.4    190 
 Black Bear               8170   34.0    28.0    121    41.8    29.1    144 
 Blind Bull Sum           8650   34.7    17.1    203      -M    15.2       *
 Cottonwood Creek         7670   22.6    15.7    144    29.8    18.5    161 
 East Rim Divide          7930   16.3     7.5    217    18.1     9.0    201 
 Grand Targhee            9260   34.9    27.9    125    31.4    23.7    132 
 Granite Creek            6770   25.8    13.0    198    26.4    15.7    168 
 Grassy Lake              7265   30.6    24.8    123    42.8    28.1    152 
 Gros Ventre Summit       8750   15.4     9.3    166    18.8     9.5    198 
 Gunsight Pass            9820   16.6    10.0    166    19.7    10.2    193 
 Lewis Lake Divide        7850   31.7    24.4    130    41.6    27.4    152 
 Phillips Bench           8200   29.8    18.7    159    38.4    21.5    179 
 Salt River Summit        7760   17.9    10.0    179    23.6    12.8    184 
 Snake River Station      6920   18.7    13.6    138    29.0    17.8    163 
 Spring Creek Divide      9000   30.6    17.2    178    29.7    18.3    162 
 Thumb Divide             7980   19.1    11.2    171    21.4    13.9    154 
 Togwotee Pass            9580   26.1    16.9    154    30.1    18.4    164 
 Two Ocean Plateau        9240     -M    20.4       *     -M    20.5       *
 Willow Creek             8380   27.3    20.7    132    38.1    25.2    151 
 Younts Peak              8350   20.9    11.2    187    24.0    12.1    198 
                                                -----                  -----
                Basin Index (%)                  153                    164 
 

MADISON-GALLATIN

 Black Bear               8170   34.0    28.0    121    41.8    29.1    144 
 Canyon                   7870   14.2     9.9    143    20.6    12.5    165 
 Madison Plateau          7750   21.3    16.7    128    29.3    20.0    146 
 West Yellowstone         6700   10.8     8.2    132    19.0    11.1    171 
 Whiskey Creek            6800   12.9    11.3    114    21.3    15.4    138 
                                                -----                  -----
                Basin Index (%)                  126                    150 
 

YELLOWSTONE

 Beartooth Lake           9360   24.2    15.8    153    19.9    15.0    133 
 Burnt Mtn                5880    4.7     3.8    124    10.1     9.0    112 
 Canyon                   7870   14.2     9.9    143    20.6    12.5    165 
 Cole Creek               7850    7.4     9.0     82     5.7     8.6     66 
 Evening Star             9200   28.4    18.4    154    33.7    21.0    160 
 Fisher Creek             9100   30.7    24.6    125    34.8    24.2    144 
 Northeast Entrance       7350    9.5     7.6    125    15.5     9.5    163 
 Parker Peak              9400   24.7    14.9    166    23.4    13.3    176 
 Sylvan Lake              8420   19.0    15.0    127    30.1    17.1    176 
 Thumb Divide             7980   19.1    11.2    171    21.4    13.9    154 
 Two Ocean Plateau        9240     -M    20.4       *     -M    20.5       *
 White Mill               8700   23.4    17.2    136    25.5    18.1    141 
 Wolverine                7650   13.6     8.2    166    17.1     9.5    180 
                                                -----                  -----
                Basin Index (%)                  141                    150 
 

WIND RIVER

 Burroughs Creek          8750   19.2      -M       *   21.1      -M       *
 Castle Creek             8400   10.1      -M       *   12.4      -M       *
 Cold Springs             9630    9.9     5.3    187    12.1     7.1    170 
 Deer Park                9700   24.1    10.2    236    27.0    14.3    189 
 Hobbs Park              10100   17.3     9.0    192    15.8     9.0    176 
 Kirwin                   9550   14.8     6.4    231    17.3     8.3    208 
 Little Warm              9370   11.8     7.7    153    17.3     9.3    186 
 Owl Creek                8975    5.7     3.6    158     7.3     4.1    178 
 South Pass               9040   22.3    10.6    210    20.4    12.8    159 
 St. Lawrence Alt         8620    5.3     4.9    108     9.8     6.1    161 
 Togwotee Pass            9580   26.1    16.9    154    30.1    18.4    164 
 Townsend Creek           8700    8.9     6.1    146    12.0     8.2    146 
                                                -----                  -----
                Basin Index (%)                  181                    173 
 

BIGHORN BASIN

 Bald Mtn.                9380   14.1    13.8    102    12.4    12.3    101 
 Bear Trap Meadow         8200    3.9     4.0     98     5.2     5.8     90 
 Bone Springs Div         9350   12.0    11.2    107    12.0    11.0    109 
 Grave Springs            8550    4.5     6.0     75     4.8     7.4     65 
 Kirwin                   9550   14.8     6.4    231    17.3     8.3    208 
 Marquette                8760    6.2      -M       *    9.9      -M       *
 Middle Powder            7760    5.0     7.4     68     5.6     8.3     67 
 Owl Creek                8975    5.7     3.6    158     7.3     4.1    178 
 Powder River Pass        9480    5.2     7.5     69     8.2     9.0     91 
 Shell Creek              9580   12.0    10.5    114     9.4    10.0     94 
 Timber Creek             7950    4.4     3.1    142     5.8     4.9    118 
                                                -----                  -----
                Basin Index (%)                  111                    109 
 

SHOSHONE RIVER

 Blackwater               9780   28.4    16.3    174    31.6    15.3    207 
 Evening Star             9200   28.4    18.4    154    33.7    21.0    160 
 Marquette                8760    6.2      -M       *    9.9      -M       *
 Sylvan Road              7120   13.4     8.8    152    24.5    13.4    183 
 Younts Peak              8350   20.9    11.2    187    24.0    12.1    198 
                                                -----                  -----
                Basin Index (%)                  167                    184 
 

POWDER RIVER

 Bear Trap Meadow         8200    3.9     4.0     98     5.2     5.8     90 
 Cloud Peak Reservoir     9860    8.9     9.9     90    10.5     9.0    117 
 Grave Springs            8550    4.5     6.0     75     4.8     7.4     65 
 Hansen Sawmill           8360    6.1     4.4    139     8.0     5.7    140 
 Middle Powder            7760    5.0     7.4     68     5.6     8.3     67 
 Powder River Pass        9480    5.2     7.5     69     8.2     9.0     91 
 Soldier Park             8720    9.3      -M       *    7.9      -M       *
                                                -----                  -----
                Basin Index (%)                   86                     94 
 

TONGUE RIVER

 Big Goose                7990    6.6     5.9    112     7.4     7.5     99 
 Bone Springs Div         9350   12.0    11.2    107    12.0    11.0    109 
 Burgess Junction         7880    7.0     7.7     91     8.2     8.5     96 
 Dome Lake                8880    8.4     8.1    104     9.7     9.5    102 
 Little Goose             8870    7.0      -M       *    9.4      -M       *
 Sucker Creek             8880    7.9     8.3     95     8.1    10.0     81 
 Tie Creek                6870    4.1     4.1    100     8.0     7.9    101 
                                                -----                  -----
                Basin Index (%)                  102                     98 
 

BELLE FOURCHE

 Cole Canyon              5910    3.0     4.7     64     4.8     6.8     71 
                                                -----                  -----
                Basin Index (%)                   64                     71 
 

CHEYENNE RIVER BASIN

 Blind Park               6890    4.5     5.9     76     6.1     8.9     69 
 North Rapid Creek        6130    4.4     5.6     79     5.3     7.2     74 
                                                -----                  -----
                Basin Index (%)                   77                     71 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   21.5    15.5    139    21.9    16.7    131 
 Blackhall Mtn            9820   30.3      -M       *   30.0      -M       *
 Columbine                9160   21.6    18.4    117    23.6    19.3    122 
 Divide Peak              8880   15.9    14.8    107    18.1    16.1    112 
 Joe Wright              10120   16.5    15.4    107    23.4    18.8    124 
 Laprele Creek            8375    9.3     7.1    131     8.6     8.9     97 
 Med Bow                 10500   30.6      -M       *   27.9      -M       *
 North French Creek      10130   19.9    19.7    101    21.1    19.9    106 
 Never Summer            10280   19.0    14.8    128    15.7      -M       *
 Old Battle              10000   30.6    22.9    134    31.3    26.7    117 
 Rawah                    9020   10.8     7.8    138    13.8    10.2    135 
 Sage Creek Basin         7850   12.9    10.4    124    13.1    11.3    116 
 Sand Lake               10050   22.9    19.6    117    21.3    17.9    119 
 South Brush Creek        8440    8.8     9.3     95     9.6    11.0     87 
 Tower                   10500   35.9    34.4    104    37.4    30.2    124 
 Webber Springs           9250   24.5    17.6    139    28.0    20.1    139 
 Willow Creek Pass        9540   15.1     9.0    168    16.1     9.8    164 
 Zirkel                   9340   35.0    21.9    160    36.2    22.3    162 
                                                -----                  -----
                Basin Index (%)                  124                    125 
 

SWEETWATER

 Deer Park                9700   24.1    10.2    236    27.0    14.3    189 
 Larsen Creek             9000   17.2     8.9    193    19.6      -M       *
 South Pass               9040   22.3    10.6    210    20.4    12.8    159 
                                                -----                  -----
                Basin Index (%)                  214                    175 
 

LOWER N. PLATTE

 Casper Mtn.              7900    7.7     9.5     81     7.5    10.5     71 
 Laprele Creek            8375    9.3     7.1    131     8.6     8.9     97 
 Reno Hill                8400    8.7     9.3     94     9.2    10.5     88 
 Windy Peak               7900    7.3     5.4    135     7.8     7.4    105 
                                                -----                  -----
                Basin Index (%)                  105                     89 
 

LARAMIE RIVER

 Brooklyn Lake           10240   19.5    14.4    135    17.6    15.2    116 
 Cinnabar Park            9574   15.1    16.2     93    17.8    19.0     94 
 Crow Creek               8330    3.6     6.6     55     6.2     7.5     83 
 Deadman Hill            10220   16.5    11.9    139    16.0    12.1    132 
 Rawah                    9020   10.8     7.8    138    13.8    10.2    135 
 Roach                    9700   14.1    12.0    118    16.7    13.9    120 
                                                -----                  -----
                Basin Index (%)                  116                    113 
 

S. PLATTE

 Black Mountain           8920    7.7      -M       *    8.8      -M       *
 Crow Creek               8330    3.6     6.6     55     6.2     7.5     83 
 Deadman Hill            10220   16.5    11.9    139    16.0    12.1    132 
                                                -----                  -----
                Basin Index (%)                  109                    113 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440    8.8     9.0     98    13.1    11.6    113 
 Divide Peak              8880   15.9    14.8    107    18.1    16.1    112 
 Elk River                8700   17.1    14.2    120    16.9    15.2    111 
 Little Snake River       8915   27.0    18.9    143    32.5    24.2    134 
 Old Battle              10000   30.6    22.9    134    31.3    26.7    117 
 Sage Creek Basin         7850   12.9    10.4    124    13.1    11.3    116 
 Sandstone RS             8150   10.8    10.2    106    13.0    14.3     91 
 Whiskey Park             8950   22.8    20.0    114    24.4    21.3    115 
                                                -----                  -----
                Basin Index (%)                  121                    115 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   18.3     9.4    195    20.3     9.9    205 
 Blind Bull Sum           8650   34.7    17.1    203      -M    15.2       *
 East Rim Divide          7930   16.3     7.5    217    18.1     9.0    201 
 Elkhart Park G.S.        9400   15.4     8.9    173    19.6     9.9    198 
 Gros Ventre Summit       8750   15.4     9.3    166    18.8     9.5    198 
 Gunsight Pass            9820   16.6    10.0    166    19.7    10.2    193 
 Kendall R.S.             7740   19.7     9.3    212      -M    11.0       *
 Loomis Park              8240   23.2    11.0    211    26.5    13.3    199 
 New Fork Lake            8340   14.4     7.7    187    14.4     8.2    176 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   17.2     9.1    189    22.3    10.9    205 
 Spring Creek Divide      9000   30.6    17.2    178    29.7    18.3    162 
 Triple Peak              8500   30.8    16.0    192    32.1    19.0    169 
                                                -----                  -----
                Basin Index (%)                  191                    187 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    9.0      -M       *   11.6      -M       *
 Buck Pasture             9632   15.6      -M       *   18.1      -M       *
 EF Blacks Fork GS        9360   12.6      -M       *   10.0      -M       *
 Hams Fork                7840   14.8     8.7    170    16.5     8.7    190 
 Hewinta                  9519    9.7     7.3    133    11.9    10.2    117 
 Hickerson Park           9145    6.7     5.3    126     7.0     7.1     99 
 Hole-in-Rock             9150    5.6     5.1    110     7.6     6.7    113 
 Indian Creek             9425   30.9    17.4    178      -M    16.8       *
 Kelley R.S.              8180   21.8    11.0    198    25.4    13.8    184 
 Spirit Lk               10235   11.8      -M       *   13.0      -M       *
 Steel Creek Park        10200   12.9    10.7    121    14.6    11.7    125 
                                                -----                  -----
                Basin Index (%)                  156                    143 
 

UPPER BEAR RIVER

 Bear River RS            8777   10.7      -M       *   13.3      -M       *
 Bug Lake                 7950   26.2    13.8    190    26.0    14.7    177 
 Burts Miller Ranch       8000    6.1      -M       *    7.0      -M       *
 Chalk Creek #1           8993   26.8    17.0    158    27.6    18.6    148 
 Hayden Fork              9212   18.4    11.4    161      -M    15.5       *
 Kelley R.S.              8180   21.8    11.0    198    25.4    13.8    184 
 Lily Lake                9156   12.5     9.6    130    14.7    12.6    117 
 Monte Cristo             8960   28.3    19.6    144    26.7    19.5    137 
 Salt River Summit        7760   17.9    10.0    179    23.6    12.8    184 
                                                -----                  -----
                Basin Index (%)                  164                    157 

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


 -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.