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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 2:58a, 5/21/19
Temperature 29.0°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 MONDAY: MAY 20 , 2019
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7060     .7      .0       *   25.5    24.5    104 
 Black Bear               8170   39.0    33.8    115    51.2    44.6    115 
 Blind Bull Sum           8650   24.1    19.9    121    22.9    23.2     99 
 Cottonwood Creek         7670    9.8     6.3    156    32.1    30.0    107 
 East Rim Divide          7930     .0      .5      0*   15.4    14.1    109 
 Grand Targhee            9260   43.5    42.3    103    39.7    36.8    108 
 Granite Creek            6770    1.1      .0       *   24.7    22.9    108 
 Grassy Lake              7265     -M    17.4       *     -M    41.8       *
 Gros Ventre Summit       8750     .5     5.6      9    15.7    16.1     98 
 Gunsight Pass            9820   12.6    10.4    121    20.0    17.7    113 
 Lewis Lake Divide        7850   22.8    22.4    102    44.5    41.0    109 
 Phillips Bench           8200   19.5    19.2    102    37.5    32.8    114 
 Salt River Summit        7640     .2      .0       *   20.7    19.9    104 
 Snake River Station      6920     .0      .0       *   29.4    26.5    111 
 Spring Creek Divide      9000   20.8    20.3    102    28.7    28.0    102 
 Thumb Divide             7980    5.0     1.4    357*   23.2    22.8    102 
 Togwotee Pass            9580   23.4    23.0    102    30.1    29.7    101 
 Two Ocean Plateau        9240   28.1    28.3     99    30.7    32.8     94 
 Willow Creek             8080   19.0    16.6    114    43.0    40.8    105 
 Younts Peak              8350     -M    11.8       *     -M    19.5       *
                                                -----                  -----
                Basin Index (%)                  108                    106 
 

MADISON-GALLATIN

 Black Bear               8170   39.0    33.8    115    51.2    44.6    115 
 Canyon                   7870    4.4     2.2    200    19.8    19.9     99 
 Madison Plateau          7750   20.4    14.3    143    33.6    31.5    107 
 West Yellowstone         6700     .0      .0       *   21.0    17.5    120 
 Whiskey Creek            6800    8.9     5.6    159    25.4    24.3    105 
                                                -----                  -----
                Basin Index (%)                  130                    110 
 

YELLOWSTONE

 Beartooth Lake           9360   24.1    21.6    112    25.5    24.1    106 
 Burnt Mtn                5880     .2      .0       *   21.7    19.1    114 
 Canyon                   7870    4.4     2.2    200    19.8    19.9     99 
 Cole Creek               7850   18.5    16.2    114      -M    19.5       *
 Evening Star             9200   26.2    23.7    111    36.1    33.3    108 
 Fisher Creek             9100   34.3    32.8    105    42.8    38.3    112 
 Northeast Entrance       7350     .1      .0       *   18.3    15.5    118 
 Parker Peak              9400   24.0    19.8    121    29.9    22.4    133 
 Sylvan Lake              8420   14.1    15.1     93    32.8    27.6    119 
 Thumb Divide             7980    5.0     1.4    357*   23.2    22.8    102 
 Two Ocean Plateau        9240   28.1    28.3     99    30.7    32.8     94 
 White Mill               8700   23.7    22.3    106    25.8    28.9     89 
 Wolverine                7650     .0      .0       *   16.7    15.5    108 
 Younts Peak              8350     -M    11.8       *     -M    19.5       *
                                                -----                  -----
                Basin Index (%)                  111                    108 
 

WIND RIVER

 Burroughs Creek          8750    1.6      -M       *   17.3      -M       *
 Castle Creek             8400     .0      -M       *    9.8      -M       *
 Cold Springs             9630     .1      .0       *   12.3    14.4     85 
 Deer Park                9700   13.0    10.5    124    23.9    25.9     92 
 Hobbs Park              10100   16.8    13.1    128    18.5    19.3     96 
 Kirwin                   9550    6.1     8.4     73    15.1    15.9     95 
 Little Warm              9370    2.3     2.7     85    10.9    17.4     63 
 Owl Creek                8975     .5      .0       *   10.8     9.6    112 
 South Pass               9040    9.4     6.8    138    17.3    22.5     77 
 St. Lawrence Alt         8620     -M      .0       *     -M    13.5       *
 Togwotee Pass            9580   23.4    23.0    102    30.1    29.7    101 
 Townsend Creek           8700    6.2      .0       *   17.4    17.1    102 
                                                -----                  -----
                Basin Index (%)                  121                     91 
 

BIGHORN BASIN

 Bald Mtn.                9380   18.6    19.2     97    18.1    22.1     82 
 Bear Trap Meadow         8200     .2      .0       *   10.0    12.6     79 
 Bone Springs Div         9350   14.1    14.3     99    16.6    20.8     80 
 Grave Springs            8550    2.7     2.6    104    12.2    15.0     81 
 Kirwin                   9550    6.1     8.4     73    15.1    15.9     95 
 Marquette                8760    5.1      -M       *   15.8      -M       *
 Middle Powder            7760     .6     5.3     11    14.0    16.3     86 
 Owl Creek                8975     .5      .0       *   10.8     9.6    112 
 Powder River Pass        9480    2.7     5.4     50      -M    17.3       *
 Shell Creek              9580   14.7    15.3     96    14.9    18.5     81 
 Timber Creek             7950     .2      .0       *   11.4    12.2     93 
                                                -----                  -----
                Basin Index (%)                   86                     86 
 

SHOSHONE RIVER

 Blackwater               9780   27.2    24.3    112    31.4    26.0    121 
 Evening Star             9200   26.2    23.7    111    36.1    33.3    108 
 Marquette                8760    5.1      -M       *   15.8      -M       *
 Sylvan Lake              8420   14.1    15.1     93    32.8    27.6    119 
 Sylvan Road              7120     .1      .0       *   19.2    20.3     95 
 Younts Peak              8350     -M    11.8       *     -M    19.5       *
                                                -----                  -----
                Basin Index (%)                  107                    111 
 

POWDER RIVER

 Bear Trap Meadow         8200     .2      .0       *   10.0    12.6     79 
 Cloud Peak Reservoir     9860   11.9    14.8     80    15.7    19.6     80 
 Grave Springs            8550    2.7     2.6    104    12.2    15.0     81 
 Hansen Sawmill           8360     .5      .0       *   11.9    12.9     92 
 Middle Powder            7760     .6     5.3     11    14.0    16.3     86 
 Powder River Pass        9480    2.7     5.4     50      -M    17.3       *
 Soldier Park             8720     .1      -M       *   10.5      -M       *
                                                -----                  -----
                Basin Index (%)                   66                     84 
 

TONGUE RIVER

 Big Goose                7990    6.1     4.8    127    16.1    17.1     94 
 Bone Springs Div         9350   14.1    14.3     99    16.6    20.8     80 
 Burgess Junction         7880    5.7     8.1     70    12.9    17.0     76 
 Dome Lake                8880    6.2     6.2    100    14.9    19.0     78 
 Little Goose             8870    8.6      -M       *   12.2      -M       *
 Sucker Creek             8880    9.1     8.6    106    16.0    20.2     79 
 Tie Creek                6870     .2      .0       *   16.7    17.3     97 
                                                -----                  -----
                Basin Index (%)                   99                     84 
 

BELLE FOURCHE

 Blind Park               6890     .0      .0       *   10.6    16.6     64 
 Cole Canyon              5910     .0      .0       *   18.1    14.9    121 
                                                -----                  -----
                Basin Index (%)                     *                    91 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0      .0       *   10.6    16.6     64 
 North Rapid Creek        6130     -M      .0       *     -M    14.5       *
                                                -----                  -----
                Basin Index (%)                     *                    64 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   23.8    18.1    131    31.6    28.5    111 
 Blackhall Mtn            9820   28.7      -M       *   39.4      -M       *
 Columbine                9160    8.0     3.0    267    33.5    30.6    109 
 Divide Peak              8880    5.6     5.7     98    28.3    26.5    107 
 Joe Wright              10120   20.9    21.1     99    35.9    32.8    109 
 Laprele Creek            8375     .1      .0       *   17.8    16.9    105 
 Med Bow                 10500   40.2      -M       *   42.3      -M       *
 Never Summer            10280   23.7    20.3    117    23.8      -M       *
 North French Creek      10130   28.8    29.6     97    36.2    33.7    107 
 Old Battle              10000   38.5    32.5    118    43.1    42.1    102 
 Rawah                    9020     .3      .4     75*   20.7    18.9    110 
 Sage Creek Basin         7850     -M      .0       *   19.6    17.4    113 
 Sand Lake               10050   30.3    27.8    109    30.3    31.9     95 
 South Brush Creek        8440     .0      .0       *   15.8    20.1     79 
 Tower                   10500   55.4    47.7    116    54.0    47.9    113 
 Webber Springs           9250   16.8    12.0    140    36.9    32.1    115 
 Whiskey Park             8950   25.4    21.9    116    38.6    33.9    114 
 Willow Creek Pass        9540   13.8     9.3    148    21.1    17.3    122 
 Zirkel                   9340   17.2     9.7    177    43.8    33.4    131 
                                                -----                  -----
                Basin Index (%)                  119                    109 
 

SWEETWATER

 Deer Park                9700   13.0    10.5    124    23.9    25.9     92 
 Larsen Creek             9000     .0     3.6      0    17.2      -M       *
 South Pass               9040    9.4     6.8    138    17.3    22.5     77 
                                                -----                  -----
                Basin Index (%)                  107                     85 
 

LOWER N. PLATTE

 Casper Mtn.              7900    5.0     4.5    111    17.3    20.4     85 
 Laprele Creek            8375     .1      .0       *   17.8    16.9    105 
 Reno Hill                8400    9.6     3.6    267    22.9    21.3    108 
 Windy Peak               7900     .3      .0       *   14.1    14.9     95 
                                                -----                  -----
                Basin Index (%)                  185                     98 
 

LARAMIE RIVER

 Brooklyn Lake           10240   18.2    16.4    111    31.6    27.2    116 
 Cinnabar Park            9574   14.0    12.3    114    28.8    29.5     98 
 Crow Creek               8330     .1      .0       *   14.2    15.1     94 
 Deadman Hill            10220   17.4    16.5    105    24.4    23.0    106 
 Rawah                    9020     .3      .4     75*   20.7    18.9    110 
 Roach                    9700    9.7    11.5     84    27.0    24.7    109 
 Windy Peak               7900     .3      .0       *   14.1    14.9     95 
                                                -----                  -----
                Basin Index (%)                  105                    105 
 

S. PLATTE

 Black Mountain           8920     .4      -M       *   18.1      -M       *
 Crow Creek               8330     .1      .0       *   14.2    15.1     94 
 Deadman Hill            10220   17.4    16.5    105    24.4    23.0    106 
                                                -----                  -----
                Basin Index (%)                  106*                   101 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0      .0       *   20.6    18.6    111 
 Divide Peak              8880    5.6     5.7     98    28.3    26.5    107 
 Elk River                8700    1.5      .0       *   23.5    24.6     96 
 Little Snake River       8915   17.9    13.3    135    44.0    35.2    125 
 Old Battle              10000   38.5    32.5    118    43.1    42.1    102 
 Sage Creek Basin         7850     -M      .0       *   19.6    17.4    113 
 Sandstone RS             8150     .0      .0       *   22.4    22.5    100 
 Whiskey Park             8950   25.4    21.9    116    38.6    33.9    114 
                                                -----                  -----
                Basin Index (%)                  121                    109 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080    7.4     3.1    239    18.6    16.8    111 
 Blind Bull Sum           8650   24.1    19.9    121    22.9    23.2     99 
 East Rim Divide          7930     .0      .5      0*   15.4    14.1    109 
 Elkhart Park G.S.        9400    9.5     5.7    167    17.9    16.7    107 
 Gros Ventre Summit       8750     .5     5.6      9    15.7    16.1     98 
 Gunsight Pass            9820   12.6    10.4    121    20.0    17.7    113 
 Indian Creek             9425   18.5    18.5    100    23.2    27.0     86 
 Kendall R.S.             7740     .1      .0       *   14.9    16.8     89 
 Loomis Park              8240    4.5     2.6    173    21.0    20.5    102 
 New Fork Lake            8340     .0      .0       *   13.9    13.5    103 
 Pocket Creek             9360   10.0      -M       *   18.3      -M       *
 Snider Basin             8060     .1      .4     25*   16.4    16.8     98 
 Spring Creek Divide      9000   20.8    20.3    102    28.7    28.0    102 
 Triple Peak              8500   12.8     8.4    152    31.2    30.2    103 
                                                -----                  -----
                Basin Index (%)                  116                    101 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869     .2      -M       *   16.4      -M       *
 Buck Pasture             9632    7.8      -M       *   25.2      -M       *
 EF Blacks Fork GS        9360     .2      -M       *   16.0      -M       *
 Hams Fork                7840     .1      .0       *   16.0    14.4    111 
 Hewinta                  9500     .0      .0       *   18.9    17.7    107 
 Hickerson Park           9122     .5      .0       *   15.1    13.4    113 
 Hole-in-Rock             9168     .0      .0       *   14.4    13.0    111 
 Indian Creek             9425   18.5    18.5    100    23.2    27.0     86 
 Kelley R.S.              8180    3.3     2.8    118    20.3    21.8     93 
 Spirit Lk               10235   11.5      -M       *   21.4      -M       *
 Steel Creek Park        10158   14.8    14.7    101    23.7    21.0    113 
                                                -----                  -----
                Basin Index (%)                  103*                   103 
 

UPPER BEAR RIVER

 Bear River RS            8777     .0      -M       *   18.8      -M       *
 Bug Lake                 7987    9.5     4.9    194    28.9    23.5    123 
 Burts Miller Ranch       8000     -M      -M       *   10.8      -M       *
 Chalk Creek #1           9171   17.7    15.6    113    35.1    30.8    114 
 Hayden Fork              9130     .3      .0       *   28.5    25.8    110 
 Kelley R.S.              8180    3.3     2.8    118    20.3    21.8     93 
 Lily Lake                9133     .7      .0       *   20.4    21.3     96 
 Monte Cristo             8932   26.9    14.9    181    39.1    31.6    124 
 Salt River Summit        7640     .2      .0       *   20.7    19.9    104 
 Spring Creek Divide      9000   20.8    20.3    102    28.7    28.0    102 
                                                -----                  -----
                Basin Index (%)                  136                    109 
----------------------------------------------------------------------------

 -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.