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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

At 3:58a, 5/20/18
Temperature 37.1°F
Wind 0.0 mph


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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 SATURDAY: APRIL 25 , 2015
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 Base Camp                7030    6.3    10.8     58    17.9    22.1     81
 Black Bear               8170   21.7    36.9     59    27.3    40.7     67
 Blind Bull Sum           8650   23.7    24.3     98    16.7    20.7     81
 Cottonwood Creek         7670     -M    17.3       *     -M    26.5       *
 East Rim Divide          7930     -M     9.0       *     -M    12.4       *
 Grand Targhee            9260   35.8    43.1     83    30.1    33.5     90
 Granite Creek            6770    7.7     9.5     81    17.0    20.6     83
 Grassy Lake              7265   19.0    30.2     63    29.0    38.2     76
 Gros Ventre Summit       8750    8.4    12.5     67     9.6    14.0     69
 Gunsight Pass            9820   10.1    13.5     75    13.0    15.4     84
 Lewis Lake Divide        7850   14.4    30.7     47    27.0    37.5     72
 Phillips Bench           8200   18.1    25.4     71    24.2    29.8     81
 Salt River Summit        7760     -M     8.5       *     -M    17.8       *
 Snake River Station      6920    3.1    10.1     31    18.9    24.0     79
 Spring Creek Divide      9000     -M    23.7       *     -M    25.4       *
 Thumb Divide             7980     .1    14.2      1    12.3    20.2     61
 Togwotee Pass            9580   21.0    24.4     86    25.4    26.3     97
 Two Ocean Plateau        9240   24.4    29.0     84    23.8    29.2     82
 Willow Creek             8380   14.2    25.7     55    29.2    36.3     80
 Younts Peak              8350     -M    15.1       *     -M    17.0       *
                                                -----                  -----
                Basin Index (%)                   67                     79


MADISON-GALLATIN

 Black Bear               8170   21.7    36.9     59    27.3    40.7     67
 Canyon                   7870    6.4    11.7     55    11.4    17.4     66
 Madison Plateau          7750   10.7    22.6     47      -M    28.0       *
 West Yellowstone         6700     -M     5.1       *     -M    15.4       *
 Whiskey Creek            6800     -M    15.5       *     -M    21.7       *
                                                -----                  -----
                Basin Index (%)                   54                     67*


YELLOWSTONE

 Beartooth Lake           9360   21.0    23.6     89    20.6    21.2     97
 Burnt Mtn                5880     .1      .0       *   13.5    14.9     91
 Canyon                   7870    6.4    11.7     55    11.4    17.4     66
 Cole Creek               7850   13.6    16.3     83    12.8    15.2     84
 Evening Star             9200   22.2    24.5     91    27.2    29.4     93
 Fisher Creek             9100   30.3    33.2     91    29.0    34.1     85
 Northeast Entrance       7350     .1     5.1      2    13.5    13.3    102
 Parker Peak              9400   18.3    21.8     84    21.2    19.3    110
 Sylvan Lake              8420    8.3    20.3     41    19.8    24.2     82
 Thumb Divide             7980     .1    14.2      1    12.3    20.2     61
 Two Ocean Plateau        9240   24.4    29.0     84    23.8    29.2     82
 White Mill               8700   23.4    23.8     98    23.9    25.4     94
 Wolverine                7650     .0     5.6      0    13.1    13.2     99
                                                -----                  -----
                Basin Index (%)                   73                     87


WIND RIVER

 Burroughs Creek          8750    7.5      -M       *   16.4      -M       *
 Castle Creek             8400     .4      -M       *    9.2      -M       *
 Cold Springs             9630     .0     3.1      0     9.1    11.6     78
 Deer Park                9700   10.1    16.3     62    15.4    22.7     68
 Hobbs Park              10100   11.1    15.6     71    12.3    15.7     78
 Kirwin                   9550   10.8    10.1    107    13.6    13.0    105
 Little Warm              9370    6.5     9.5     68    11.1    14.5     77
 Owl Creek                8975     .0     2.7      0     7.1     7.3     97
 South Pass               9040   10.0    15.2     66    12.8    19.4     66
 St. Lawrence Alt         8620     .2     4.9      4     9.0    10.6     85
 Togwotee Pass            9580   21.0    24.4     86    25.4    26.3     97
 Townsend Creek           8700    6.4     8.8     73    11.1    14.1     79
                                                -----                  -----
                Basin Index (%)                   69                     82


BIGHORN BASIN

 Bald Mtn.                9380   16.3    20.4     80    13.6    18.7     73
 Bear Trap Meadow         8200     .1     2.0      5     7.8     9.9     79
 Bone Springs Div         9350   14.1    16.4     86    13.5    17.3     78
 Grave Springs            8550    6.0     9.2     65     7.1    12.2     58
 Kirwin                   9550   10.8    10.1    107    13.6    13.0    105
 Marquette                8760    7.1      -M       *   11.4      -M       *
 Middle Powder            7760    8.2    12.3     67      -M    13.3       *
 Owl Creek                8975     .0     2.7      0     7.1     7.3     97
 Powder River Pass        9480    8.5    10.2     83    13.0    14.2     92
 Shell Creek              9580   12.3    15.8     78    11.9    15.3     78
 Timber Creek             7950    2.4     3.7     65    10.8     9.0    120
                                                -----                  -----
                Basin Index (%)                   77                     84


SHOSHONE RIVER

 Blackwater               9780   19.8    24.4     81    20.8    22.5     92
 Evening Star             9200   22.2    24.5     91    27.2    29.4     93
 Marquette                8760    7.1      -M       *   11.4      -M       *
 Sylvan Road              7120     .0     8.3      0    15.9    17.9     89
 Younts Peak              8350     -M    15.1       *     -M    17.0       *
                                                -----                  -----
                Basin Index (%)                   73                     92


POWDER RIVER

 Bear Trap Meadow         8200     .1     2.0      5     7.8     9.9     79
 Cloud Peak Reservoir     9860   13.7    16.3     84    13.8    15.6     88
 Grave Springs            8550    6.0     9.2     65     7.1    12.2     58
 Hansen Sawmill           8360     .2     4.3      5     8.9    10.1     88
 Middle Powder            7760    8.2    12.3     67      -M    13.3       *
 Powder River Pass        9480    8.5    10.2     83    13.0    14.2     92
 Soldier Park             8720     .0      -M       *    9.2      -M       *
                                                -----                  -----
                Basin Index (%)                   68                     82


TONGUE RIVER

 Big Goose                7990    7.9     9.1     87    11.3    13.4     84
 Bone Springs Div         9350   14.1    16.4     86    13.5    17.3     78
 Burgess Junction         7880   11.4    12.4     92    11.6    13.9     83
 Dome Lake                8880   10.6    11.8     90    11.8    15.4     77
 Little Goose             8870     -M      -M       *     -M      -M       *
 Sucker Creek             8880   11.1    12.7     87    13.7    16.4     84
 Tie Creek                6870     .1     3.5      3    11.7    13.6     86
                                                -----                  -----
                Basin Index (%)                   84                     82


BELLE FOURCHE

 Cole Canyon              5910     .1      .8     12     7.8    10.9     72
                                                -----                  -----
                Basin Index (%)                   12                     72


CHEYENNE RIVER BASIN

 Blind Park               6890     .1     3.6      3     9.5    13.6     70
 North Rapid Creek        6130     .0     3.5      0     9.3    11.6     80
                                                -----                  -----
                Basin Index (%)                    1                     75


UPPER N. PLATTE

 Arapaho Ridge           10960   17.1    21.8     78    19.7    25.4     78
 Blackhall Mtn            9820   24.1      -M       *   27.8      -M       *
 Columbine                9160    8.5    20.6     41    23.8    27.7     86
 Divide Peak              8880     -M    18.1       *   16.0    23.5     68
 Joe Wright              10120   19.4    23.2     84    27.7    28.8     96
 Laprele Creek            8375    4.2     7.3     58    11.0    14.3     77
 Med Bow                 10500   32.6      -M       *   30.2      -M       *
 North French Creek      10130   23.2    32.6     71    25.4    29.5     86
 Never Summer            10280   16.9    21.1     80    17.6      -M       *
 Old Battle              10000   25.5    34.1     75    25.0    37.9     66
 Rawah                    9020    4.3     8.0     54    16.6    16.6    100
 Sage Creek Basin         7850     -M     2.7       *    8.7    15.6     56
 Sand Lake               10050   26.0    31.0     84    25.8    27.9     92
 South Brush Creek        8440     .2    10.0      2    12.1    17.0     71
 Tower                   10500     -M    49.3       *     -M    43.3       *
 Webber Springs           9250   16.5    21.9     75    21.9    29.0     76
 Willow Creek Pass        9540   11.4    13.7     83    13.4    15.1     89
 Zirkel                   9340   16.3    22.3     73    29.8    30.3     98
                                                -----                  -----
                Basin Index (%)                   71                     82


SWEETWATER

 Deer Park                9700   10.1    16.3     62    15.4    22.7     68
 Larsen Creek             9000     .2     9.8      2    10.6      -M       *
 South Pass               9040   10.0    15.2     66    12.8    19.4     66
                                                -----                  -----
                Basin Index (%)                   49                     67


LOWER N. PLATTE

 Casper Mtn.              7900    6.6    14.2     46    11.5    17.1     67
 Laprele Creek            8375    4.2     7.3     58    11.0    14.3     77
 Reno Hill                8400   11.4    13.8     83    15.3    17.9     85
 Windy Peak               7900    3.8     6.1     62    10.4    12.3     85
                                                -----                  -----
                Basin Index (%)                   63                     78


LARAMIE RIVER

 Brooklyn Lake           10240   20.9    22.8     92    24.4    23.7    103
 Cinnabar Park            9574   12.0    20.0     60    23.6    26.1     90
 Crow Creek               8330    1.2      .0       *   13.2    12.8    103
 Deadman Hill            10220   19.2    18.1    106    20.3    19.8    103
 Rawah                    9020    4.3     8.0     54    16.6    16.6    100
 Roach                    9700   12.1    16.8     72    18.2    21.4     85
                                                -----                  -----
                Basin Index (%)                   81                     97


S. PLATTE

 Black Mountain           8920   11.6      -M       *   16.2      -M       *
 Crow Creek               8330    1.2      .0       *   13.2    12.8    103
 Deadman Hill            10220   19.2    18.1    106    20.3    19.8    103
                                                -----                  -----
                Basin Index (%)                  113*                   103


LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     1.9      0    11.4    16.5     69
 Divide Peak              8880     -M    18.1       *   16.0    23.5     68
 Elk River                8700    3.9    14.6     27    16.0    21.9     73
 Little Snake River       8915   14.9    23.3     64    27.2    31.7     86
 Old Battle              10000   25.5    34.1     75    25.0    37.9     66
 Sage Creek Basin         7850     -M     2.7       *    8.7    15.6     56
 Sandstone RS             8150     .0     8.6      0      -M    20.1       *
 Whiskey Park             8950   19.9    25.6     78    27.0    30.4     89
                                                -----                  -----
                Basin Index (%)                   59                     74


UPPER GREEN RIVER

 Big Sandy Opening        9080    8.6    12.1     71    10.2    14.6     70
 Blind Bull Sum           8650   23.7    24.3     98    16.7    20.7     81
 East Rim Divide          7930     -M     9.0       *     -M    12.4       *
 Elkhart Park G.S.        9400    7.6    11.8     64    10.8    14.4     75
 Gros Ventre Summit       8750    8.4    12.5     67     9.6    14.0     69
 Gunsight Pass            9820   10.1    13.5     75    13.0    15.4     84
 Kendall R.S.             7740    2.7     6.6     41    11.4    15.0     76
 Loomis Park              8240    8.1    11.9     68    15.9    18.3     87
 New Fork Lake            8340    3.1     7.4     42     9.9    11.6     85
 Pocket Creek             9360    7.2      -M       *    7.4      -M       *
 Snider Basin             8060    3.2    10.1     32    15.0    15.1     99
 Spring Creek Divide      9000     -M    23.7       *     -M    25.4       *
 Triple Peak              8500   16.5    19.0     87    25.8    27.0     96
                                                -----                  -----
                Basin Index (%)                   71                     83


LOWER GREEN RIVER

 Blacks Fork Jct          8870     .5      -M       *   10.2      -M       *
 Buck Pasture             9700    5.5      -M       *   14.1      -M       *
 EF Blacks Fork GS        9360     .0      -M       *   10.1      -M       *
 Hams Fork                7840     .2     5.0      4     9.7    12.6     77
 Hewinta                  9519     .3     6.9      4    11.6    15.5     75
 Hickerson Park           9145    1.7     5.0     34    10.1    11.5     88
 Hole-in-Rock             9150    2.8     5.0     56    10.4    11.0     95
 Indian Creek             9425   15.8    23.7     67    18.8    24.2     78
 Kelley R.S.              8180     -M    11.9       *     -M    19.5       *
 Spirit Lk               10235    5.0      -M       *   13.9      -M       *
 Steel Creek Park        10200   11.9    16.5     72    13.8    18.4     75
                                                -----                  -----
                Basin Index (%)                   53                     80


UPPER BEAR RIVER

 Bear River RS            8777     .1      -M       *    8.2      -M       *
 Bug Lake                 7950    5.3    16.2     33    13.0    20.9     62
 Burts Miller Ranch       8000     .1      -M       *    4.0      -M       *
 Chalk Creek #1           8993    6.8    24.6     28    16.6    27.5     60
 Hayden Fork              9212     .3    10.7      3    15.0    22.9     66
 Kelley R.S.              8180     -M    11.9       *     -M    19.5       *
 Lily Lake                9156     .3     9.9      3    10.1    18.8     54
 Monte Cristo             8960   12.8    27.4     47    19.6    28.2     70
 Salt River Summit        7760     -M     8.5       *     -M    17.8       *
                                                -----                  -----
                Basin Index (%)                   29                     63

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


 -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.