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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 3:23a, 10/18/18
Temperature 37.4°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 TUESDAY: APRIL 18 , 2017
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING
 

SNAKE RIVER  

 Base Camp                7030   22.0    12.2    180    40.1    21.6    186 
 Black Bear               8170   47.6    36.8    129    55.7    39.5    141 
 Blind Bull Sum           8650   44.0    23.9    184      -M    20.1       *
 Cottonwood Creek         7670   26.9    19.1    141    39.3    25.5    154 
 East Rim Divide          7930   12.9     9.6    134    21.3    12.1    176 
 Grand Targhee            9260   48.6    41.7    117    43.6    32.3    135 
 Granite Creek            6770   23.4    11.4    205    36.4    20.2    180 
 Grassy Lake              7265   37.1    31.5    118    56.4    37.1    152 
 Gros Ventre Summit       8750   20.2    13.2    153    24.9    13.5    184 
 Gunsight Pass            9820   23.6    13.5    175    25.7    14.6    176 
 Lewis Lake Divide        7850   46.0    30.2    152    56.8    36.5    156 
 Phillips Bench           8200   38.3    25.8    148    47.4    28.9    164 
 Salt River Summit        7760   18.4    10.3    179    29.7    17.2    173 
 Snake River Station      6920   15.8    11.7    135    36.5    23.3    157 
 Spring Creek Divide      9000   41.7    23.5    177    41.2    24.6    167 
 Thumb Divide             7980   21.3    14.5    147    28.8    19.5    148 
 Togwotee Pass            9580   33.8    23.5    144    39.5    25.4    156 
 Two Ocean Plateau        9240     -M    27.8       *     -M    28.2       *
 Willow Creek             8380   27.7    26.8    103    51.5    34.9    148 
 Younts Peak              8350   25.5    15.0    170    31.8    16.4    194 
                                                -----                  -----
                Basin Index (%)                  146                    159 
 

MADISON-GALLATIN

 Black Bear               8170   47.6    36.8    129    55.7    39.5    141 
 Canyon                   7870   17.7    12.4    143    26.4    16.8    157 
 Madison Plateau          7750   28.0    22.8    123    37.4    27.2    138 
 West Yellowstone         6700    3.8     8.0     48    23.9    14.9    160 
 Whiskey Creek            6800   13.2    15.1     87    27.8    21.0    132 
                                                -----                  -----
                Basin Index (%)                  116                    143 
 

YELLOWSTONE

 Beartooth Lake           9360   33.5    23.0    146    28.8    20.5    140 
 Burnt Mtn                5880     .2      .0       *   15.0    13.9    108 
 Canyon                   7870   17.7    12.4    143    26.4    16.8    157 
 Cole Creek               7850   12.0    16.0     75     9.5    14.2     67 
 Evening Star             9200   38.9    25.0    156    45.8    28.4    161 
 Fisher Creek             9100   44.4    32.2    138    48.6    33.0    147 
 Northeast Entrance       7350    4.8     7.3     66    21.0    12.8    164 
 Parker Peak              9400   37.2    20.8    179    35.5    18.5    192 
 Sylvan Lake              8420   24.4    20.3    120    38.3    23.3    164 
 Thumb Divide             7980   21.3    14.5    147    28.8    19.5    148 
 Two Ocean Plateau        9240     -M    27.8       *     -M    28.2       *
 White Mill               8700   37.5    23.6    159    37.0    24.7    150 
 Wolverine                7650    3.6     7.8     46    21.4    12.7    169 
                                                -----                  -----
                Basin Index (%)                  136                    149 
 

WIND RIVER

 Burroughs Creek          8750   21.3      -M       *   28.1      -M       *
 Castle Creek             8400    8.8      -M       *   15.9      -M       *
 Cold Springs             9630   16.0     5.1    314    20.4    10.7    191 
 Deer Park                9700   32.5    16.1    202    38.6    21.1    183 
 Hobbs Park              10100   29.7    14.8    201    29.1    14.5    201 
 Kirwin                   9550   22.5    10.0    225    26.0    12.2    213 
 Little Warm              9370   18.7    10.2    183    25.5    13.7    186 
 Owl Creek                8975    8.9     4.4    202    13.4     6.6    203 
 South Pass               9040   31.4    15.7    200    29.2    18.3    160 
 St. Lawrence Alt         8620    8.3     5.7    146    17.6     9.7    181 
 Togwotee Pass            9580   33.8    23.5    144    39.5    25.4    156 
 Townsend Creek           8700   17.5     9.7    180    23.7    13.0    182 
                                                -----                  -----
                Basin Index (%)                  190                    181 
 

BIGHORN BASIN

 Bald Mtn.                9380   20.8    19.6    106    18.1    17.9    101 
 Bear Trap Meadow         8200    3.7     3.8     97     9.7     9.2    105 
 Bone Springs Div         9350   20.8    16.3    128    18.9    16.5    115 
 Grave Springs            8550    6.8     9.7     70     8.7    11.3     77 
 Kirwin                   9550   22.5    10.0    225    26.0    12.2    213 
 Marquette                8760   14.2      -M       *   18.1      -M       *
 Middle Powder            7760    8.4    12.5     67     8.6    12.5     69 
 Owl Creek                8975    8.9     4.4    202    13.4     6.6    203 
 Powder River Pass        9480    9.1    10.1     90    14.5    13.5    107 
 Shell Creek              9580   18.5    15.3    121    16.0    14.6    110 
 Timber Creek             7950    7.0     5.1    137    12.0     8.2    146 
                                                -----                  -----
                Basin Index (%)                  118                    119 
 

SHOSHONE RIVER

 Blackwater               9780   38.9    23.8    163    43.2    21.6    200 
 Evening Star             9200   38.9    25.0    156    45.8    28.4    161 
 Marquette                8760   14.2      -M       *   18.1      -M       *
 Sylvan Road              7120    1.7    10.2     17    31.2    17.4    179 
 Younts Peak              8350   25.5    15.0    170    31.8    16.4    194 
                                                -----                  -----
                Basin Index (%)                  142                    181 
 

POWDER RIVER

 Bear Trap Meadow         8200    3.7     3.8     97     9.7     9.2    105 
 Cloud Peak Reservoir     9860   16.5    15.6    106    20.4    14.5    141 
 Grave Springs            8550    6.8     9.7     70     8.7    11.3     77 
 Hansen Sawmill           8360   11.1     5.2    213    15.7     9.3    169 
 Middle Powder            7760    8.4    12.5     67     8.6    12.5     69 
 Powder River Pass        9480    9.1    10.1     90    14.5    13.5    107 
 Soldier Park             8720   14.5      -M       *   15.7      -M       *
                                                -----                  -----
                Basin Index (%)                   98                    110 
 

TONGUE RIVER

 Big Goose                7990   11.9     9.5    125    15.3    12.3    124 
 Bone Springs Div         9350   20.8    16.3    128    18.9    16.5    115 
 Burgess Junction         7880   10.9    12.3     89    12.9    13.2     98 
 Dome Lake                8880   16.6    11.9    139    17.7    14.6    121 
 Little Goose             8870   14.3      -M       *   18.8      -M       *
 Sucker Creek             8880   13.3    12.7    105    15.1    15.5     97 
 Tie Creek                6870     .4     4.5      9    14.5    12.6    115 
                                                -----                  -----
                Basin Index (%)                  110                    111 
 

BELLE FOURCHE

 Cole Canyon              5910     .0     2.4      0     7.9    10.1     78 
                                                -----                  -----
                Basin Index (%)                    0                     78 
 

CHEYENNE RIVER BASIN

 Blind Park               6890     .0     4.4      0     9.7    12.6     77 
 North Rapid Creek        6130     .0     4.6      0     8.2    10.5     78 
                                                -----                  -----
                Basin Index (%)                    0                     77 
 

UPPER N. PLATTE

 Arapaho Ridge           10960   24.0    21.4    112    26.4    24.0    110 
 Blackhall Mtn            9820   34.5      -M       *   38.2      -M       *
 Columbine                9160   12.3    21.0     59    27.8    26.6    105 
 Divide Peak              8880   11.8    19.3     61    23.3    22.5    104 
 Joe Wright              10120   15.9    22.1     72    28.8    27.4    105 
 Laprele Creek            8375    6.8     8.6     79    12.8    13.4     96 
 Med Bow                 10500   34.9      -M       *   35.7      -M       *
 North French Creek      10130   23.5    32.0     73    27.9    28.1     99 
 Never Summer            10280   21.9    20.6    106    19.6      -M       *
 Old Battle              10000   36.4    32.4    112    38.9    36.6    106 
 Rawah                    9020    4.8     8.9     54    17.4    15.5    112 
 Sage Creek Basin         7850     -M     7.1       *   16.8    15.1    111 
 Sand Lake               10050   30.2    30.4     99    28.1    26.4    106 
 South Brush Creek        8440     -M    10.1       *   13.1    16.2     81 
 Tower                   10500   37.5    47.7     79    44.2    41.6    106 
 Webber Springs           9250   23.3    22.6    103    33.8    28.1    120 
 Willow Creek Pass        9540   17.9    12.8    140    18.6    14.2    131 
 Zirkel                   9340     -M    23.0       *   42.4    29.5    144 
                                                -----                  -----
                Basin Index (%)                   89                    110 
 

SWEETWATER

 Deer Park                9700   32.5    16.1    202    38.6    21.1    183 
 Larsen Creek             9000   12.9    10.5    123    23.6      -M       *
 South Pass               9040   31.4    15.7    200    29.2    18.3    160 
                                                -----                  -----
                Basin Index (%)                  182                    172 
 

LOWER N. PLATTE

 Casper Mtn.              7900    9.9    14.5     68    13.6    16.2     84 
 Laprele Creek            8375    6.8     8.6     79    12.8    13.4     96 
 Reno Hill                8400   11.8    14.0     84    15.3    16.8     91 
 Windy Peak               7900    4.7     6.9     68    12.0    11.4    105 
                                                -----                  -----
                Basin Index (%)                   75                     93 
 

LARAMIE RIVER

 Brooklyn Lake           10240   20.6    22.1     93    23.6    22.4    105 
 Cinnabar Park            9574   13.3    20.5     65    22.6    25.2     90 
 Crow Creek               8330     .0     1.7      0     9.3    11.9     78 
 Deadman Hill            10220   20.3    16.6    122    20.9    18.6    112 
 Rawah                    9020    4.8     8.9     54    17.4    15.5    112 
 Roach                    9700   14.8    16.5     90    21.6    20.3    106 
                                                -----                  -----
                Basin Index (%)                   86                    101 
 

S. PLATTE

 Black Mountain           8920    8.5      -M       *   13.3      -M       *
 Crow Creek               8330     .0     1.7      0     9.3    11.9     78 
 Deadman Hill            10220   20.3    16.6    122    20.9    18.6    112 
                                                -----                  -----
                Basin Index (%)                  111                     99 
 

LITTLE SNAKE RIVER

 Battle Mountain          7440     .0     5.4      0    17.1    15.8    108 
 Divide Peak              8880   11.8    19.3     61    23.3    22.5    104 
 Elk River                8700    6.6    16.1     41    20.4    21.0     97 
 Little Snake River       8915   21.9    25.0     88    39.2    31.0    126 
 Old Battle              10000   36.4    32.4    112    38.9    36.6    106 
 Sage Creek Basin         7850     -M     7.1       *   16.8    15.1    111 
 Sandstone RS             8150     -M    10.8       *   16.2    19.2     84 
 Whiskey Park             8950   21.8    26.2     83    30.6    29.3    104 
                                                -----                  -----
                Basin Index (%)                   79                    106 
 

UPPER GREEN RIVER

 Big Sandy Opening        9080   20.8    12.7    164    23.6    13.9    170 
 Blind Bull Sum           8650   44.0    23.9    184      -M    20.1       *
 East Rim Divide          7930   12.9     9.6    134    21.3    12.1    176 
 Elkhart Park G.S.        9400   19.6    12.0    163    24.8    13.9    178 
 Gros Ventre Summit       8750   20.2    13.2    153    24.9    13.5    184 
 Gunsight Pass            9820   23.6    13.5    175    25.7    14.6    176 
 Kendall R.S.             7740   16.7     9.0    186    29.5    14.6    202 
 Loomis Park              8240   25.2    13.2    191    32.7    17.8    184 
 New Fork Lake            8340   13.3     9.2    145    18.5    11.2    165 
 Pocket Creek             9360     -M      -M       *     -M      -M       *
 Snider Basin             8060   16.5    11.1    149    28.0    14.6    192 
 Spring Creek Divide      9000   41.7    23.5    177    41.2    24.6    167 
 Triple Peak              8500   35.2    19.3    182    41.7    26.1    160 
                                                -----                  -----
                Basin Index (%)                  170                    176 
 

LOWER GREEN RIVER

 Blacks Fork Jct          8869    5.6      -M       *   16.5      -M       *
 Buck Pasture             9632   15.6      -M       *   24.2      -M       *
 EF Blacks Fork GS        9360   12.1      -M       *   17.9      -M       *
 Hams Fork                7840   11.0     7.5    147    22.0    11.9    185 
 Hewinta                  9500    6.7     8.7     77    17.9    14.8    121 
 Hickerson Park           9122    6.4     5.8    110    13.5    10.9    124 
 Hole-in-Rock             9168    5.6     6.2     90    14.0    10.4    135 
 Indian Creek             9425   40.3    23.3    173    41.8    23.3    179 
 Kelley R.S.              8180   24.1    13.1    184    31.2    18.7    167 
 Spirit Lk               10235   15.5      -M       *   19.2      -M       *
 Steel Creek Park        10158   19.2    16.1    119    21.7    17.5    124 
                                                -----                  -----
                Basin Index (%)                  140                    151 
 

UPPER BEAR RIVER

 Bear River RS            8777    3.4      -M       *   19.1      -M       *
 Bug Lake                 7987   31.7    18.0    176    34.8    20.1    173 
 Burts Miller Ranch       8000     .0      -M       *   10.6      -M       *
 Chalk Creek #1           9171   32.0    24.8    129    37.1    26.4    141 
 Hayden Fork              9130   14.9    12.6    118    30.4    22.1    138 
 Kelley R.S.              8180   24.1    13.1    184    31.2    18.7    167 
 Lily Lake                9133   11.4    11.3    101    20.5    18.1    113 
 Monte Cristo             8932   36.0    27.6    130    40.5    27.0    150 
 Salt River Summit        7760   18.4    10.3    179    29.7    17.2    173 
                                                -----                  -----
                Basin Index (%)                  143                    150 

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


 -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.