Home
Interactive Maps
WY Weather
WY Climate
Drought
Data/Products
CoCoRaHS
Library
Articles & Publications
Education & Outreach
Site Map
Cooperative Projects
Water Links
Contact Us

Subscribe to our mailing list

Water Resources Data System
Dept 3943
1000 E. University Ave.
Laramie, WY 82071

wrds@uwyo.edu
Ph (307) 766-6651
Fax (307) 766-3785


Share this page
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 20 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   21.7    11.9    182    40.6    21.7    187 
 Black Bear               8170   48.3    36.9    131    56.1    39.8    141 
 Blind Bull Sum           8650   44.2    24.0    184      -M    20.2       *
 Cottonwood Creek         7670   27.4    18.6    147    40.1    25.8    155 
 East Rim Divide          7930   12.4     9.5    131    21.4    12.2    175 
 Grand Targhee            9260   50.2    42.0    120    44.7    32.6    137 
 Granite Creek            6770   22.9    10.8    212    36.8    20.3    181 
 Grassy Lake              7265   37.6    31.3    120    57.3    37.3    154 
 Gros Ventre Summit       8750     -M    13.2       *     -M    13.7       *
 Gunsight Pass            9820   24.2    13.6    178    26.1    14.9    175 
 Lewis Lake Divide        7850   46.9    30.4    154    57.6    36.8    157 
 Phillips Bench           8200   38.9    25.6    152    47.9    29.2    164 
 Salt River Summit        7760   17.8     9.7    184    29.9    17.4    172 
 Snake River Station      6920   16.0    11.3    142    37.2    23.5    158 
 Spring Creek Divide      9000   42.0    23.5    179    41.6    24.7    168 
 Thumb Divide             7980   21.1    14.5    146    29.1    19.7    148 
 Togwotee Pass            9580   34.3    23.8    144    40.0    25.7    156 
 Two Ocean Plateau        9240     -M    28.1       *     -M    28.5       *
 Willow Creek             8380   27.8    26.8    104    52.2    35.3    148 
 Younts Peak              8350   24.7    15.1    164    32.0    16.6    193 
                                                -----                  -----
                Basin Index (%)                  147                    159 
 

MADISON-GALLATIN

 Black Bear               8170   48.3    36.9    131    56.1    39.8    141 
 Canyon                   7870   17.7    12.2    145    26.6    17.0    156 
 Madison Plateau          7750   28.2    22.9    123    37.8    27.5    137 
 West Yellowstone         6700    2.6     7.4     35    24.1    15.1    160 
 Whiskey Creek            6800   12.8    15.3     84    27.9    21.2    132 
                                                -----                  -----
                Basin Index (%)                  116                    143 
 

YELLOWSTONE

 Beartooth Lake           9360   33.6    23.4    144    28.9    20.8    139 
 Burnt Mtn                5880     .1      .0       *   15.1    14.2    106 
 Canyon                   7870   17.7    12.2    145    26.6    17.0    156 
 Cole Creek               7850   11.9    16.3     73     9.5    14.5     66 
 Evening Star             9200   39.3    24.8    158    46.3    28.7    161 
 Fisher Creek             9100   45.0    32.4    139    49.2    33.3    148 
 Northeast Entrance       7350    3.9     6.7     58    21.1    13.0    162 
 Parker Peak              9400   38.0    20.9    182    35.9    18.7    192 
 Sylvan Lake              8420   25.0    20.4    123    38.9    23.6    165 
 Thumb Divide             7980   21.1    14.5    146    29.1    19.7    148 
 Two Ocean Plateau        9240     -M    28.1       *     -M    28.5       *
 White Mill               8700   38.0    23.7    160    37.3    24.9    150 
 Wolverine                7650    4.0     7.2     56    21.4    12.8    167 
                                                -----                  -----
                Basin Index (%)                  137                    149 
 

WIND RIVER

 Burroughs Creek          8750   21.0      -M       *   28.0      -M       *
 Castle Creek             8400    8.6      -M       *   15.8      -M       *
 Cold Springs             9630   15.8     4.6    343    20.4    10.9    187 
 Deer Park                9700   33.2    16.3    204    39.3    21.5    183 
 Hobbs Park              10100   30.4    14.8    205    29.8    14.8    201 
 Kirwin                   9550   22.8    10.0    228    26.1    12.4    210 
 Little Warm              9370   19.0    10.1    188    25.5    13.9    183 
 Owl Creek                8975    8.4     4.0    210    13.4     6.9    194 
 South Pass               9040   31.4    15.5    203    29.6    18.6    159 
 St. Lawrence Alt         8620    7.8     5.3    147    17.9     9.9    181 
 Togwotee Pass            9580   34.3    23.8    144    40.0    25.7    156 
 Townsend Creek           8700   17.4     9.4    185    24.2    13.3    182 
                                                -----                  -----
                Basin Index (%)                  194                    180 
 

BIGHORN BASIN

 Bald Mtn.                9380   21.0    19.8    106    18.1    18.2     99 
 Bear Trap Meadow         8200    4.1     3.2    128    10.5     9.4    112 
 Bone Springs Div         9350   20.9    16.1    130    18.8    16.7    113 
 Grave Springs            8550    7.7     9.6     80     9.7    11.7     83 
 Kirwin                   9550   22.8    10.0    228    26.1    12.4    210 
 Marquette                8760   14.2      -M       *   18.2      -M       *
 Middle Powder            7760    9.8    12.5     78     9.2    12.8     72 
 Owl Creek                8975    8.4     4.0    210    13.4     6.9    194 
 Powder River Pass        9480    9.5    10.2     93    14.9    13.7    109 
 Shell Creek              9580   19.2    15.4    125    16.5    14.8    111 
 Timber Creek             7950    6.6     4.8    138    11.9     8.4    142 
                                                -----                  -----
                Basin Index (%)                  123                    119 
 

SHOSHONE RIVER

 Blackwater               9780   39.3    23.8    165    43.5    21.8    200 
 Evening Star             9200   39.3    24.8    158    46.3    28.7    161 
 Marquette                8760   14.2      -M       *   18.2      -M       *
 Sylvan Road              7120     .4     9.8      4    31.5    17.6    179 
 Younts Peak              8350   24.7    15.1    164    32.0    16.6    193 
                                                -----                  -----
                Basin Index (%)                  141                    181 
 

POWDER RIVER

 Bear Trap Meadow         8200    4.1     3.2    128    10.5     9.4    112 
 Cloud Peak Reservoir     9860   17.2    15.8    109    20.7    14.9    139 
 Grave Springs            8550    7.7     9.6     80     9.7    11.7     83 
 Hansen Sawmill           8360   11.1     4.8    231    15.8     9.5    166 
 Middle Powder            7760    9.8    12.5     78     9.2    12.8     72 
 Powder River Pass        9480    9.5    10.2     93    14.9    13.7    109 
 Soldier Park             8720   14.4      -M       *   15.8      -M       *
                                                -----                  -----
                Basin Index (%)                  106                    112 
 

TONGUE RIVER

 Big Goose                7990   11.7     9.3    126    15.3    12.6    121 
 Bone Springs Div         9350   20.9    16.1    130    18.8    16.7    113 
 Burgess Junction         7880   11.0    12.5     88    12.9    13.4     96 
 Dome Lake                8880   16.7    11.8    142    17.9    14.9    120 
 Little Goose             8870   14.4      -M       *   19.0      -M       *
 Sucker Creek             8880   13.4    12.7    106    15.1    15.8     96 
 Tie Creek                6870     .1     4.4      2    14.6    12.8    114 
                                                -----                  -----
                Basin Index (%)                  110                    110 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     2.0      0     8.5    10.4     82 
                                                -----                  -----
                Basin Index (%)                    0                     82 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     4.1      0    10.3    13.1     79 
 North Rapid Creek        6130     .0     4.2      0     8.8    11.0     80 
                                                -----                  -----
                Basin Index (%)                    0                     79 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   23.9    21.4    112    26.6    24.3    109 
 Blackhall Mtn            9820   34.1      -M       *   38.6      -M       *
 Columbine                9160   11.2    20.6     54    27.9    26.9    104 
 Divide Peak              8880   11.0    18.9     58    23.3    22.8    102 
 Joe Wright              10120   15.5    22.2     70    29.0    27.7    105 
 Laprele Creek            8375    6.4     8.0     80    12.8    13.7     93 
 Med Bow                 10500   35.3      -M       *   36.0      -M       *
 North French Creek      10130   23.6    32.0     74    28.3    28.6     99 
 Never Summer            10280   22.1    20.7    107    19.9      -M       *
 Old Battle              10000   36.4    32.7    111    39.0    37.0    105 
 Rawah                    9020    4.0     8.4     48    17.5    15.5    113 
 Sage Creek Basin         7850     -M     6.0       *   17.0    15.3    111 
 Sand Lake               10050   30.0    30.5     98    28.2    26.8    105 
 South Brush Creek        8440     -M     9.8       *   12.9    16.5     78 
 Tower                   10500   37.9    48.0     79    44.5    42.1    106 
 Webber Springs           9250   22.8    22.0    104    34.0    28.4    120 
 Willow Creek Pass        9540   17.9    13.1    137    18.8    14.4    131 
 Zirkel                   9340   23.7    22.7    104    42.7    29.7    144 
                                                -----                  -----
                Basin Index (%)                   89                    109 
 

SWEETWATER

 Deer Park                9700   33.2    16.3    204    39.3    21.5    183 
 Larsen Creek             9000   13.1    10.3    127    24.1      -M       *
 South Pass               9040   31.4    15.5    203    29.6    18.6    159 
                                                -----                  -----
                Basin Index (%)                  185                    172 
 

LOWER N. PLATTE

 Casper Mtn.              7900    9.6    14.4     67    14.2    16.6     86 
 Laprele Creek            8375    6.4     8.0     80    12.8    13.7     93 
 Reno Hill                8400   11.8    13.9     85    15.7    17.2     91 
 Windy Peak               7900    3.9     6.6     59    11.8    11.6    102 
                                                -----                  -----
                Basin Index (%)                   74                     92 
 

LARAMIE RIVER

 Brooklyn Lake           10240   20.4    22.2     92    23.6    22.8    104 
 Cinnabar Park            9574   12.5    20.1     62    22.7    25.3     90 
 Crow Creek               8330     .0      .7      0*    9.2    12.0     77 
 Deadman Hill            10220   19.6    17.0    115    21.0    18.9    111 
 Rawah                    9020    4.0     8.4     48    17.5    15.5    113 
 Roach                    9700   14.5    16.6     87    21.8    20.6    106 
                                                -----                  -----
                Basin Index (%)                   84                    101 
 

S. PLATTE

 Black Mountain           8920    7.4      -M       *   13.3      -M       *
 Crow Creek               8330     .0      .7      0*    9.2    12.0     77 
 Deadman Hill            10220   19.6    17.0    115    21.0    18.9    111 
                                                -----                  -----
                Basin Index (%)                  111*                    98 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     4.3      0    16.5    16.1    102 
 Divide Peak              8880   11.0    18.9     58    23.3    22.8    102 
 Elk River                8700    6.1    15.5     39    20.6    21.3     97 
 Little Snake River       8915   21.2    24.3     87    39.5    31.2    127 
 Old Battle              10000   36.4    32.7    111    39.0    37.0    105 
 Sage Creek Basin         7850     -M     6.0       *   17.0    15.3    111 
 Sandstone RS             8150     -M    10.1       *   16.3    19.5     84 
 Whiskey Park             8950   21.1    25.9     81    30.9    29.6    104 
                                                -----                  -----
                Basin Index (%)                   79                    105 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   21.6    12.7    170    24.2    14.1    172 
 Blind Bull Sum           8650   44.2    24.0    184      -M    20.2       *
 East Rim Divide          7930   12.4     9.5    131    21.4    12.2    175 
 Elkhart Park G.S.        9400   19.9    11.9    167    25.1    14.0    179 
 Gros Ventre Summit       8750     -M    13.2       *     -M    13.7       *
 Gunsight Pass            9820   24.2    13.6    178    26.1    14.9    175 
 Kendall R.S.             7740   16.6     8.4    198    29.6    14.8    200 
 Loomis Park              8240   25.3    13.0    195    33.0    18.0    183 
 New Fork Lake            8340   13.3     8.8    151    18.6    11.3    165 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   15.9    10.7    149    28.1    14.8    190 
 Spring Creek Divide      9000   42.0    23.5    179    41.6    24.7    168 
 Triple Peak              8500   35.5    19.3    184    42.2    26.3    160 
                                                -----                  -----
                Basin Index (%)                  174                    176 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    5.2      -M       *   16.8      -M       *
 Buck Pasture             9632   15.6      -M       *   24.5      -M       *
 EF Blacks Fork GS        9360   11.6      -M       *   18.6      -M       *
 Hams Fork                7840   11.4     6.7    170    22.4    12.0    187 
 Hewinta                  9500    6.6     8.1     81    18.4    15.0    123 
 Hickerson Park           9122    5.6     5.4    104    13.5    11.0    123 
 Hole-in-Rock             9168    5.3     5.9     90    14.2    10.5    135 
 Indian Creek             9425   40.8    23.3    175    42.3    23.5    180 
 Kelley R.S.              8180   24.0    12.7    189    31.6    18.9    167 
 Spirit Lk               10235   15.1      -M       *   19.4      -M       *
 Steel Creek Park        10158   19.7    16.2    122    22.3    17.7    126 
                                                -----                  -----
                Basin Index (%)                  145                    152 
 

UPPER BEAR RIVER

 Bear River RS            8777    3.1      -M       *   19.7      -M       *
 Bug Lake                 7987   31.2    17.2    181    35.6    20.4    175 
 Burts Miller Ranch       8000     .0      -M       *   11.0      -M       *
 Chalk Creek #1           9171   31.4    24.6    128    37.8    26.7    142 
 Hayden Fork              9130   14.3    11.8    121    30.9    22.4    138 
 Kelley R.S.              8180   24.0    12.7    189    31.6    18.9    167 
 Lily Lake                9133   11.5    10.6    108    21.1    18.3    115 
 Monte Cristo             8932   35.9    27.5    131    41.5    27.3    152 
 Salt River Summit        7760   17.8     9.7    184    29.9    17.4    172 
                                                -----                  -----
                Basin Index (%)                  146                    151 

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


 -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.