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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: DECEMBER 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    6.0     5.2    115     8.4     7.7    109 
 Black Bear               8170   13.6    12.6    108    13.1    13.6     96 
 Blind Bull Sum           8650   11.2     6.7    167     7.3     7.2    101 
 Cottonwood Creek         7670    5.4     6.1     89     7.0     8.5     82 
 East Rim Divide          7930    3.0     2.7    111     4.1     4.2     98 
 Grand Targhee            9260   20.8    11.9    175    12.7    11.2    113 
 Granite Creek            6770     -M     4.0       *     -M     7.0       *
 Grassy Lake              7265    7.8     8.8     89    11.6    12.6     92 
 Gros Ventre Summit       8750    7.0     4.6    152     6.4     4.9    131 
 Gunsight Pass            9820    6.1     4.1    149     6.7     4.9    137 
 Lewis Lake Divide        7850   10.0     9.3    108    13.4    12.7    106 
 Phillips Bench           8200    7.7     7.6    101     9.4     9.6     98 
 Salt River Summit        7760    2.3     3.1     74     4.1     5.6     73 
 Snake River Station      6920    4.9     4.4    111     8.8     8.4    105 
 Spring Creek Divide      9000    7.6     6.9    110     8.1     8.3     98 
 Thumb Divide             7980     -M     4.1       *     -M     6.8       *
 Togwotee Pass            9580   13.2     8.6    153    13.0     9.0    144 
 Two Ocean Plateau        9240   17.0    10.2    167    11.6    10.0    116 
 Willow Creek             8380    9.0     7.7    117    12.5    11.9    105 
 Younts Peak              8350     -M     5.2       *     -M     6.1       *
                                                -----                  -----
                Basin Index (%)                  127                    105 
 

MADISON-GALLATIN

 Black Bear               8170   13.6    12.6    108    13.1    13.6     96 
 Canyon                   7870    3.9     3.6    108     6.2     5.9    105 
 Madison Plateau          7750    7.7     7.2    107     9.1     9.3     98 
 West Yellowstone         6700    3.0     2.8    107     6.0     5.1    118 
 Whiskey Creek            6800    3.7     4.3     86     5.6     7.5     75 
                                                -----                  -----
                Basin Index (%)                  105                     97 
 

YELLOWSTONE

 Beartooth Lake           9360   13.1     7.4    177    11.4     6.9    165 
 Burnt Mtn                5880    1.0     1.5     67     6.3     5.8    109 
 Canyon                   7870    3.9     3.6    108     6.2     5.9    105 
 Cole Creek               7850    5.8     5.4    107     4.5     5.6     80 
 Evening Star             9200   14.8     8.5    174    15.2    10.3    148 
 Fisher Creek             9100   18.0    10.8    167    15.3    11.5    133 
 Northeast Entrance       7350     -M     2.5       *     -M     4.9       *
 Parker Peak              9400   12.9     7.4    174    10.7     6.8    157 
 Sylvan Lake              8420    9.4     6.6    142    10.1     8.8    115 
 Thumb Divide             7980     -M     4.1       *     -M     6.8       *
 Two Ocean Plateau        9240   17.0    10.2    167    11.6    10.0    116 
 White Mill               8700   13.7     7.3    188     9.8     8.8    111 
 Wolverine                7650    3.3     3.1    106     7.2     4.9    147 
                                                -----                  -----
                Basin Index (%)                  157                    127 
 

WIND RIVER

 Burroughs Creek          8750    5.4      -M       *    6.8      -M       *
 Castle Creek             8400    2.7      -M       *    4.3      -M       *
 Cold Springs             9630    3.5     2.6    135     4.3     4.2    102 
 Deer Park                9700    5.8     4.8    121     6.7     6.8     99 
 Hobbs Park              10100    8.7     5.6    155     7.3     5.2    140 
 Kirwin                   9550    8.8     3.9    226     7.3     4.7    155 
 Little Warm              9370    7.5     3.6    208     7.4     5.1    145 
 Owl Creek                8975    1.7     2.1     81     3.4     2.5    136 
 South Pass               9040    5.0     5.0    100     4.1     6.7     61 
 St. Lawrence Alt         8620    2.5     2.6     96     4.7     3.7    127 
 Togwotee Pass            9580   13.2     8.6    153    13.0     9.0    144 
 Townsend Creek           8700    3.4     3.1    110     4.8     5.0     96 
                                                -----                  -----
                Basin Index (%)                  143                    119 
 

BIGHORN BASIN

 Bald Mtn.                9380    7.4     6.5    114     4.8     6.1     79 
 Bear Trap Meadow         8200    3.3     1.9    174     4.3     3.6    119 
 Bone Springs Div         9350    5.7     5.9     97     4.5     5.7     79 
 Grave Springs            8550    2.3     2.4     96     2.3     4.1     56 
 Kirwin                   9550    8.8     3.9    226     7.3     4.7    155 
 Marquette                8760    3.1      -M       *    5.5      -M       *
 Middle Powder            7760     -M     3.4       *     -M     5.0       *
 Owl Creek                8975    1.7     2.1     81     3.4     2.5    136 
 Powder River Pass        9480     -M     3.6       *     -M     4.8       *
 Shell Creek              9580    8.2     5.5    149     5.2     5.3     98 
 Timber Creek             7950    1.4     2.0     70     1.2     3.5     34 
                                                -----                  -----
                Basin Index (%)                  128                     93 
 

SHOSHONE RIVER

 Blackwater               9780   14.9     8.0    186    12.3     8.0    154 
 Evening Star             9200   14.8     8.5    174    15.2    10.3    148 
 Marquette                8760    3.1      -M       *    5.5      -M       *
 Sylvan Road              7120    4.0     3.8    105     8.2     7.2    114 
 Younts Peak              8350     -M     5.2       *     -M     6.1       *
                                                -----                  -----
                Basin Index (%)                  166                    140 
 

POWDER RIVER

 Bear Trap Meadow         8200    3.3     1.9    174     4.3     3.6    119 
 Cloud Peak Reservoir     9860    4.9     4.6    107     5.7     5.2    110 
 Grave Springs            8550    2.3     2.4     96     2.3     4.1     56 
 Hansen Sawmill           8360     -M     2.0       *     -M     3.4       *
 Middle Powder            7760     -M     3.4       *     -M     5.0       *
 Powder River Pass        9480     -M     3.6       *     -M     4.8       *
 Soldier Park             8720    1.5      -M       *    3.8      -M       *
                                                -----                  -----
                Basin Index (%)                  118*                    95*
 

TONGUE RIVER

 Big Goose                7990     -M     3.0       *     -M     4.5       *
 Bone Springs Div         9350    5.7     5.9     97     4.5     5.7     79 
 Burgess Junction         7880    2.6     3.6     72     3.0     4.8     62 
 Dome Lake                8880    3.3     4.2     79     3.8     5.5     69 
 Little Goose             8870    2.7      -M       *    4.6      -M       *
 Sucker Creek             8880    3.3     3.9     85      -M     5.4       *
 Tie Creek                6870     .7     1.1     64     3.4     4.6     74 
                                                -----                  -----
                Basin Index (%)                   83                     71 
 

BELLE FOURCHE

 Cole Canyon              5910    1.3     1.1    118     3.3     3.9     85 
                                                -----                  -----
                Basin Index (%)                  118                     85 
 

CHEYENNE RIVER BASIN

 Blind Park               6890    2.4     2.0    120     4.2     4.8     88 
 North Rapid Creek        6130     -M     2.2       *     -M     4.1       *
                                                -----                  -----
                Basin Index (%)                  120                     88 
 

UPPER N. PLATTE

 Arapaho Ridge           10960    6.0     7.0     86     6.4     8.6     74 
 Blackhall Mtn            9820    7.9      -M       *    8.5      -M       *
 Columbine                9160    3.2     6.0     53     8.0     8.7     92 
 Divide Peak              8880     -M     5.8       *     -M     8.0       *
 Joe Wright              10120    5.4     7.4     73    10.6     9.6    110 
 Laprele Creek            8375    1.8     2.8     64     3.3     4.8     69 
 Med Bow                 10500   11.5      -M       *   10.2      -M       *
 North French Creek      10130    8.2     8.7     94     9.1     9.2     99 
 Never Summer            10280    6.4     6.3    102     6.1      -M       *
 Old Battle              10000     -M     9.4       *     -M    12.4       *
 Rawah                    9020    3.5     3.3    106     6.7     5.8    116 
 Sage Creek Basin         7850    2.3     3.7     62     3.9     5.5     71 
 Sand Lake               10050    9.1     8.8    103     8.1     8.8     92 
 South Brush Creek        8440    3.5     3.4    103     5.0     5.6     89 
 Tower                   10500    8.9    14.4     62    10.9    14.3     76 
 Webber Springs           9250    4.8     7.0     69     7.0     9.4     74 
 Willow Creek Pass        9540    5.2     4.1    127     5.5     5.3    104 
 Zirkel                   9340    4.9     6.6     74     9.6    10.4     92 
                                                -----                  -----
                Basin Index (%)                   82                     89 
 

SWEETWATER

 Deer Park                9700    5.8     4.8    121     6.7     6.8     99 
 Larsen Creek             9000    2.4     3.4     71     4.2      -M       *
 South Pass               9040    5.0     5.0    100     4.1     6.7     61 
                                                -----                  -----
                Basin Index (%)                  100                     80 
 

LOWER N. PLATTE

 Casper Mtn.              7900    2.9     4.2     69     3.0     6.2     48 
 Laprele Creek            8375    1.8     2.8     64     3.3     4.8     69 
 Reno Hill                8400    3.9     4.7     83     5.0     5.8     86 
 Windy Peak               7900    1.4     2.2     64     3.2     4.2     76 
                                                -----                  -----
                Basin Index (%)                   72                     69 
 

LARAMIE RIVER

 Brooklyn Lake           10240    5.4     5.9     92     7.1     7.1    100 
 Cinnabar Park            9574    6.7     6.9     97     8.8     8.6    102 
 Crow Creek               8330     .0     3.5      0     4.5     4.3    105 
 Deadman Hill            10220    7.7     5.3    145     8.0     6.2    129 
 Rawah                    9020    3.5     3.3    106     6.7     5.8    116 
 Roach                    9700    4.8     4.8    100     7.1     6.9    103 
                                                -----                  -----
                Basin Index (%)                   95                    108 
 

S. PLATTE

 Black Mountain           8920    3.7      -M       *    5.9      -M       *
 Crow Creek               8330     .0     3.5      0     4.5     4.3    105 
 Deadman Hill            10220    7.7     5.3    145     8.0     6.2    129 
                                                -----                  -----
                Basin Index (%)                   88                    119 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .9     2.4     38      -M     5.5       *
 Divide Peak              8880     -M     5.8       *     -M     8.0       *
 Elk River                8700    3.5     4.4     80     6.0     6.9     87 
 Little Snake River       8915    4.1     5.1     80     8.6    11.1     77 
 Old Battle              10000     -M     9.4       *     -M    12.4       *
 Sage Creek Basin         7850    2.3     3.7     62     3.9     5.5     71 
 Sandstone RS             8150    1.8     3.2     56     3.1     6.5     48 
 Whiskey Park             8950    4.8     7.0     69     7.7     9.1     85 
                                                -----                  -----
                Basin Index (%)                   67                     75 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080    4.2     4.4     95     4.7     4.9     96 
 Blind Bull Sum           8650   11.2     6.7    167     7.3     7.2    101 
 East Rim Divide          7930    3.0     2.7    111     4.1     4.2     98 
 Elkhart Park G.S.        9400    3.7     4.0     92     4.2     5.0     84 
 Gros Ventre Summit       8750    7.0     4.6    152     6.4     4.9    131 
 Gunsight Pass            9820    6.1     4.1    149     6.7     4.9    137 
 Kendall R.S.             7740    4.2     3.3    127     5.2     4.9    106 
 Loomis Park              8240    5.1     4.2    121     5.9     6.1     97 
 New Fork Lake            8340    3.3     3.1    106     3.0     4.0     75 
 Pocket Creek             9360    4.6      -M       *    3.7      -M       *
 Snider Basin             8060    2.5     3.5     71     5.2     4.9    106 
 Spring Creek Divide      9000    7.6     6.9    110     8.1     8.3     98 
 Triple Peak              8500    8.1     6.0    135    10.4     8.5    122 
                                                -----                  -----
                Basin Index (%)                  123                    105 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    2.0      -M       *    3.1      -M       *
 Buck Pasture             9632    3.3      -M       *    4.4      -M       *
 EF Blacks Fork GS        9360    2.2      -M       *    3.0      -M       *
 Hams Fork                7840    1.7     3.1     55     3.2     4.1     78 
 Hewinta                  9500    1.4     2.5     56     3.6     5.4     67 
 Hickerson Park           9122    2.2     1.9    116     1.7     4.2     40 
 Hole-in-Rock             9168    1.6     2.1     76     2.2     4.0     55 
 Indian Creek             9425    6.6     7.2     92     5.4     7.5     72 
 Kelley R.S.              8180    3.4     4.1     83     4.5     6.4     70 
 Spirit Lk               10235    2.4      -M       *    2.8      -M       *
 Steel Creek Park        10158    4.5     5.1     88     4.4     6.1     72 
                                                -----                  -----
                Basin Index (%)                   82                     66 
 

UPPER BEAR RIVER

 Bear River RS            8777    2.0      -M       *    3.4      -M       *
 Bug Lake                 7987    4.3     4.7     91     6.1     7.0     87 
 Burts Miller Ranch       8000     .7      -M       *    2.2      -M       *
 Chalk Creek #1           9171    4.4     7.6     58     5.4     9.2     59 
 Hayden Fork              9130    3.1     3.8     82     4.6     7.5     61 
 Kelley R.S.              8180    3.4     4.1     83     4.5     6.4     70 
 Lily Lake                9133    2.4     3.9     62     3.6     6.5     55 
 Monte Cristo             8932     -M     7.3       *     -M     9.0       *
 Salt River Summit        7760    2.3     3.1     74     4.1     5.6     73 
                                                -----                  -----
                Basin Index (%)                   73                     67 
----------------------------------------------------------------------------

 -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.