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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 FRIDAY: FEBRUARY 23 , 2018
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7060   14.8    13.1    113    16.4    16.7     98 
 Black Bear               8170   32.9    28.3    116    31.0    29.6    105 
 Blind Bull Sum           8650   25.5    17.3    147    15.2    15.4     99 
 Cottonwood Creek         7670   16.9    16.0    106    18.6    18.8     99 
 East Rim Divide          7930    9.3     7.6    122     9.3     9.2    101 
 Grand Targhee            9260   35.5    28.3    125    23.4    23.9     98 
 Granite Creek            6770   14.3    13.1    109    16.4    15.9    103 
 Grassy Lake              7265   24.4    25.1     97    27.5    28.6     96 
 Gros Ventre Summit       8750   10.7     9.4    114    10.6     9.7    109 
 Gunsight Pass            9820   12.1    10.1    120    12.0    10.4    115 
 Lewis Lake Divide        7850   29.8    24.8    120      -M    27.8       *
 Phillips Bench           8200   19.0    19.0    100    20.2    21.9     92 
 Salt River Summit        7640    7.8    10.2     76     9.4    12.9     73 
 Snake River Station      6920   14.8    13.7    108    19.1    18.0    106 
 Spring Creek Divide      9000   20.0    17.5    114    19.0    18.6    102 
 Thumb Divide             7980   14.6    11.4    128    14.9    14.1    106 
 Togwotee Pass            9580   24.2    17.1    142    24.7    18.7    132 
 Two Ocean Plateau        9240   30.6    20.8    147      -M    20.9       *
 Willow Creek             8080   24.8    21.3    116    27.1    25.8    105 
 Younts Peak              8350     -M    11.3       *     -M    12.2       *
                                                -----                  -----
                Basin Index (%)                  118                    102 
 

MADISON-GALLATIN

 Black Bear               8170   32.9    28.3    116    31.0    29.6    105 
 Canyon                   7870   14.3    10.1    142    16.1    12.6    128 
 Madison Plateau          7750   20.7    17.2    120    20.8    20.3    102 
 West Yellowstone         6700   10.6     8.4    126    13.5    11.2    121 
 Whiskey Creek            6800   12.2    11.5    106    14.5    15.7     92 
                                                -----                  -----
                Basin Index (%)                  120                    107 
 

YELLOWSTONE

 Beartooth Lake           9360   33.1    16.0    207    28.7    15.1    190 
 Burnt Mtn                5880    6.0     3.9    154    12.1     9.0    134 
 Canyon                   7870   14.3    10.1    142    16.1    12.6    128 
 Cole Creek               7850   11.3     9.1    124     7.5     8.7     86 
 Evening Star             9200   33.9    18.6    182    30.8    21.4    144 
 Fisher Creek             9100   43.2    24.9    173    37.6    24.6    153 
 Northeast Entrance       7350   12.3     7.6    162    15.2     9.6    158 
 Parker Peak              9400   27.5    15.2    181    22.3    13.5    165 
 Sylvan Lake              8420   19.8    15.3    129    21.3    17.3    123 
 Thumb Divide             7980   14.6    11.4    128    14.9    14.1    106 
 Two Ocean Plateau        9240   30.6    20.8    147      -M    20.9       *
 White Mill               8700   34.7    17.7    196    25.6    18.4    139 
 Wolverine                7650   17.7     8.4    211    17.5     9.6    182 
                                                -----                  -----
                Basin Index (%)                  167                    144 
 

WIND RIVER

 Burroughs Creek          8750   13.3      -M       *   15.1      -M       *
 Castle Creek             8400    7.3      -M       *    8.5      -M       *
 Cold Springs             9630    7.5     5.4    139     8.2     7.2    114 
 Deer Park                9700    8.1    10.4     78    10.6    14.5     73 
 Hobbs Park              10100   12.8     9.1    141    11.0     9.0    122 
 Kirwin                   9550   16.1     6.6    244    14.5     8.4    173 
 Little Warm              9370   12.5     7.7    162    13.2     9.4    140 
 Owl Creek                8975    3.3     3.7     89     5.0     4.1    122 
 South Pass               9040    8.2    10.8     76      -M    12.9       *
 St. Lawrence Alt         8620    2.5     5.0     50     6.8     6.2    110 
 Togwotee Pass            9580   24.2    17.1    142    24.7    18.7    132 
 Townsend Creek           8700    5.7     6.1     93     6.6     8.3     80 
                                                -----                  -----
                Basin Index (%)                  123                    117 
 

BIGHORN BASIN

 Bald Mtn.                9380   17.1    14.0    122    11.9    12.5     95 
 Bear Trap Meadow         8200    7.5     4.1    183     8.4     5.9    142 
 Bone Springs Div         9350   15.4    11.3    136    11.2    11.2    100 
 Grave Springs            8550    5.2     6.2     84     4.3     7.5     57 
 Kirwin                   9550   16.1     6.6    244    14.5     8.4    173 
 Marquette                8760    4.3      -M       *    8.0      -M       *
 Middle Powder            7760    6.7     7.5     89      -M     8.3       *
 Owl Creek                8975    3.3     3.7     89     5.0     4.1    122 
 Powder River Pass        9480   13.9     7.6    183    12.5     9.2    136 
 Shell Creek              9580   17.2    10.8    159    13.1    10.1    130 
 Timber Creek             7950    2.6     3.1     84      -M     5.0       *
                                                -----                  -----
                Basin Index (%)                  140                    117 
 

SHOSHONE RIVER

 Blackwater               9780   28.1    16.6    169    25.9    15.5    167 
 Evening Star             9200   33.9    18.6    182    30.8    21.4    144 
 Marquette                8760    4.3      -M       *    8.0      -M       *
 Sylvan Road              7120   12.6     8.9    142    17.9    13.5    133 
 Younts Peak              8350     -M    11.3       *     -M    12.2       *
                                                -----                  -----
                Basin Index (%)                  169                    148 
 

POWDER RIVER

 Bear Trap Meadow         8200    7.5     4.1    183     8.4     5.9    142 
 Cloud Peak Reservoir     9860   12.4    10.0    124    10.6     9.2    115 
 Grave Springs            8550    5.2     6.2     84     4.3     7.5     57 
 Hansen Sawmill           8360    6.5     4.4    148     7.9     5.8    136 
 Middle Powder            7760    6.7     7.5     89      -M     8.3       *
 Powder River Pass        9480   13.9     7.6    183    12.5     9.2    136 
 Soldier Park             8720    4.7      -M       *    7.4      -M       *
                                                -----                  -----
                Basin Index (%)                  131                    116 
 

TONGUE RIVER

 Big Goose                7990    5.8     6.0     97     6.3     7.6     83 
 Bone Springs Div         9350   15.4    11.3    136    11.2    11.2    100 
 Burgess Junction         7880    7.3     7.8     94     6.5     8.6     76 
 Dome Lake                8880   11.5     8.2    140     9.2     9.6     96 
 Little Goose             8870    7.1      -M       *    9.0      -M       *
 Sucker Creek             8880    8.1     8.5     95     6.0    10.0     60 
 Tie Creek                6870    3.4     4.2     81     6.6     8.0     82 
                                                -----                  -----
                Basin Index (%)                  112                     83 
 

BELLE FOURCHE

 Cole Canyon              5910    5.4     4.8    112     7.5     6.8    110 
                                                -----                  -----
                Basin Index (%)                  112                    110 
 

CHEYENNE RIVER BASIN

 Blind Park               6890    6.9     6.0    115     9.3     9.0    103 
 North Rapid Creek        6130    6.3     5.7    111     6.7     7.2     93 
                                                -----                  -----
                Basin Index (%)                  113                     99 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   15.5    15.7     99    15.2    16.9     90 
 Blackhall Mtn            9820   21.5      -M       *   21.2      -M       *
 Columbine                9160   17.4    18.8     93    17.6    19.5     90 
 Divide Peak              8880   10.5    15.1     70    14.1    16.3     87 
 Joe Wright              10120   12.9    15.6     83    21.4    19.1    112 
 Laprele Creek            8375    5.1     7.3     70     6.7     9.0     74 
 Med Bow                 10500   31.8      -M       *   26.6      -M       *
 North French Creek      10130   21.2    20.0    106    21.1    20.2    104 
 Never Summer            10280   14.0    15.2     92    11.3      -M       *
 Old Battle              10000   19.8    23.2     85    18.9    27.0     70 
 Rawah                    9020    8.9     8.0    111    12.0    10.3    117 
 Sage Creek Basin         7850    7.3    10.4     70     8.0    11.4     70 
 Sand Lake               10050   20.3    20.1    101    17.0    18.2     93 
 South Brush Creek        8440    7.9     9.5     83     9.2    11.2     82 
 Tower                   10500   25.9    35.0     74    23.4    30.6     76 
 Webber Springs           9250   14.8    17.9     83    17.3    20.3     85 
 Willow Creek Pass        9540   10.4     9.1    114    11.0     9.9    111 
 Zirkel                   9340   20.6    22.3     92    24.4    22.5    108 
                                                -----                  -----
                Basin Index (%)                   88                     90 
 

SWEETWATER

 Deer Park                9700    8.1    10.4     78    10.6    14.5     73 
 Larsen Creek             9000    7.8     9.0     87     8.3      -M       *
 South Pass               9040    8.2    10.8     76      -M    12.9       *
                                                -----                  -----
                Basin Index (%)                   80                     73*
 

LOWER N. PLATTE

 Casper Mtn.              7900    6.2     9.6     65     4.9    10.6     46 
 Laprele Creek            8375    5.1     7.3     70     6.7     9.0     74 
 Reno Hill                8400    7.4     9.4     79     8.5    10.6     80 
 Windy Peak               7900    4.7     5.5     85     6.1     7.5     81 
                                                -----                  -----
                Basin Index (%)                   74                     69 
 

LARAMIE RIVER

 Brooklyn Lake           10240   19.4    14.5    134    19.9    15.4    129 
 Cinnabar Park            9574   18.1    16.4    110    20.2    19.1    106 
 Crow Creek               8330     -M     6.6       *    8.1     7.6    107 
 Deadman Hill            10220   15.6    12.1    129    15.0    12.2    123 
 Rawah                    9020    8.9     8.0    111    12.0    10.3    117 
 Roach                    9700   11.2    12.1     93    13.9    14.1     99 
                                                -----                  -----
                Basin Index (%)                  116                    113 
 

S. PLATTE

 Black Mountain           8920    7.3      -M       *   10.1      -M       *
 Crow Creek               8330     -M     6.6       *    8.1     7.6    107 
 Deadman Hill            10220   15.6    12.1    129    15.0    12.2    123 
                                                -----                  -----
                Basin Index (%)                  129*                   117 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440    5.1     9.3     55     6.9    11.7     59 
 Divide Peak              8880   10.5    15.1     70    14.1    16.3     87 
 Elk River                8700   12.0    14.5     83    12.7    15.4     82 
 Little Snake River       8915   16.7    19.2     87    21.6    24.3     89 
 Old Battle              10000   19.8    23.2     85    18.9    27.0     70 
 Sage Creek Basin         7850    7.3    10.4     70     8.0    11.4     70 
 Sandstone RS             8150    7.1    10.3     69     6.6    14.6     45 
 Whiskey Park             8950   18.0    20.3     89    19.6    21.6     91 
                                                -----                  -----
                Basin Index (%)                   79                     76 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080    9.3     9.5     98     9.3    10.0     93 
 Blind Bull Sum           8650   25.5    17.3    147    15.2    15.4     99 
 East Rim Divide          7930    9.3     7.6    122     9.3     9.2    101 
 Elkhart Park G.S.        9400    9.3     9.0    103     8.9    10.0     89 
 Gros Ventre Summit       8750   10.7     9.4    114    10.6     9.7    109 
 Gunsight Pass            9820   12.1    10.1    120    12.0    10.4    115 
 Kendall R.S.             7740   11.8     9.5    124    12.3    11.2    110 
 Loomis Park              8240   13.3    11.3    118    14.1    13.5    104 
 New Fork Lake            8340    9.4     7.8    121     8.8     8.4    105 
 Pocket Creek             9360    6.4      -M       *    6.2      -M       *
 Snider Basin             8060   10.0     9.2    109    11.7    11.1    105 
 Spring Creek Divide      9000   20.0    17.5    114    19.0    18.6    102 
 Triple Peak              8500   22.4    16.2    138    24.3    19.4    125 
                                                -----                  -----
                Basin Index (%)                  121                    106 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    5.4      -M       *    7.0      -M       *
 Buck Pasture             9632    8.5      -M       *    9.6      -M       *
 EF Blacks Fork GS        9360    6.8      -M       *    4.4      -M       *
 Hams Fork                7840    7.0     8.8     80     7.0     8.8     80 
 Hewinta                  9500    5.9     7.4     80     8.3    10.4     80 
 Hickerson Park           9122    5.5     5.5    100     4.6     7.3     63 
 Hole-in-Rock             9168    4.7     5.2     90     5.2     6.8     76 
 Indian Creek             9425   15.7    17.8     88    11.3    17.1     66 
 Kelley R.S.              8180    9.4    11.3     83    10.7    14.0     76 
 Spirit Lk               10235    5.8      -M       *    6.9      -M       *
 Steel Creek Park        10158    9.9    10.9     91    10.2    11.9     86 
                                                -----                  -----
                Basin Index (%)                   87                     75 
 

UPPER BEAR RIVER

 Bear River RS            8777    6.8      -M       *    8.2      -M       *
 Bug Lake                 7987   11.7    14.1     83    12.1    15.0     81 
 Burts Miller Ranch       8000    4.1      -M       *    5.0      -M       *
 Chalk Creek #1           9171   10.9    17.3     63    12.0    18.8     64 
 Hayden Fork              9130    9.2    11.5     80    11.6    15.7     74 
 Kelley R.S.              8180    9.4    11.3     83    10.7    14.0     76 
 Lily Lake                9133    7.9     9.8     81     8.7    12.7     69 
 Monte Cristo             8932   14.8    19.8     75    14.8    19.7     75 
 Salt River Summit        7640    7.8    10.2     76     9.4    12.9     73 
                                                -----                  -----
                Basin Index (%)                   76                     73 
----------------------------------------------------------------------------

 -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.