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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 MONDAY: MAY 21 , 2012
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030      .0     3.8     0     26.8    26.1   103
 BLACK BEAR               8170    34.6    33.9   102     50.9    48.8   104
 BLIND BULL SUM           8650    15.7    22.9    69     19.7    27.1    73
 COTTONWOOD CREEK         7670      .0    11.0     0     28.9    34.6    84
 EAST RIM DIVIDE          7930      .0     6.7     0     13.2    15.3    86
 GRAND TARGHEE            9260    30.8      -M      *    34.9      -M      *
 GRANITE CREEK            6770      .0     5.4     0     20.4    24.0    85
 GRASSY LAKE              7265     9.8    22.7    43     44.6    43.6   102
 GROS VENTRE SUMMIT       8750      .0     7.9     0     13.6    16.8    81
 GUNSIGHT PASS            9820     4.7      -M      *    18.3      -M      *
 LEWIS LAKE DIVIDE        7850    15.4    25.5    60     41.3    44.2    93
 PHILLIPS BENCH           8200     5.4    20.8    26     28.9    35.5    81
 SALT RIVER SUMMIT        7760      -M     2.0      *    11.3    23.3    48
 SNAKE RIVER STATION      6920      .0     2.6     0     28.0    27.4   102
 SPRING CREEK DIVIDE      9000    12.9    21.7    59     26.1    32.2    81
 THUMB DIVIDE             7980      .0     7.1     0     22.6    23.9    95
 TOGWOTEE PASS            9580    16.4    26.0    63     28.6    31.5    91
 TWO OCEAN PLATEAU        9240    29.2    29.3   100     33.5    34.9    96
 WILLOW CREEK             8380     1.1    21.9     5     39.0    41.1    95
 YOUNTS PEAK              8350     1.7    13.0    13     19.1    20.9    91
                                                -----                  -----
                Basin wide percent of average     50                     90


MADISON-GALLATIN

 BLACK BEAR               8170    34.6    33.9   102     50.9    48.8   104
 CANYON                   7870      .0     4.7     0     19.8    19.5   102
 MADISON PLATEAU          7750    13.1    16.3    80     37.9    32.9   115
 WEST YELLOWSTONE         6700      .0      .2     0*    21.4    17.1   125
 WHISKEY CREEK            6800      .6     6.6     9     28.5    26.2   109
                                                -----                  -----
                Basin wide percent of average     78                    110


YELLOWSTONE

 BEARTOOTH LAKE           9360    24.8    24.2   102     30.3    25.9   117
 BURNT MTN                5880      .0      .0   100*    15.2    23.7    64
 CANYON                   7870      .0     4.7     0     19.8    19.5   102
 COLE CREEK               7850     2.0    16.6    12     15.8    25.6    62
 EVENING STAR             9200    21.8    31.0    70     38.8    32.8   118
 FISHER CREEK             9100    38.7    34.5   112     43.4    45.1    96
 NORTHEAST ENTRANCE       7350      .0     1.6     0     17.6    16.6   106
 PARKER PEAK              9400    15.1    22.8    66     28.6    21.9   131
 SYLVAN LAKE              8420     3.5    17.6    20     31.4    27.4   115
 THUMB DIVIDE             7980      .0     7.1     0     22.6    23.9    95
 TWO OCEAN PLATEAU        9240    29.2    29.3   100     33.5    34.9    96
 WHITE MILL               8700    20.1    23.0    87     30.4    33.8    90
 WOLVERINE                7650      .0     1.5     0     15.4    17.3    89
                                                -----                  -----
                Basin wide percent of average     73                     98


WIND RIVER

 BURROUGHS CREEK          8750     2.2     8.2    27     16.5    21.5    77
 CASTLE CREEK             8400      .0      -M      *    10.3      -M      *
 COLD SPRINGS             9630      .0     2.0     0     10.8    16.1    67
 DEER PARK                9700      .0    15.9     0     21.0    29.7    71
 HOBBS PARK              10100      .0    15.1     0     16.5    19.7    84
 KIRWIN                   9550      .0     9.7     0     17.2    16.4   105
 LITTLE WARM              9370      .0     5.4     0     15.1    19.0    79
 OWL CREEK                8975      .0     1.4     0      6.7    10.1    66
 SOUTH PASS               9040      .0    11.0     0     15.2    25.1    61
 ST. LAWRENCE ALT         8620      .0     1.9     0      9.9    14.2    70
 TOGWOTEE PASS            9580    16.4    26.0    63     28.6    31.5    91
 TOWNSEND CREEK           8700      .0     3.9     0     13.1    17.8    74
                                                -----                  -----
                Basin wide percent of average     19                     77


BIGHORN BASIN

 BALD MTN.                9380    18.4    21.6    85     20.0    24.1    83
 BEAR TRAP MEADOW         8200      .0      .0   100*    14.2    13.1   108
 BONE SPRINGS DIV         9350    11.5    14.0    82     20.4    21.0    97
 GRAVE SPRINGS            8550      .0     4.4     0     14.6    15.2    96
 KIRWIN                   9550      .0     9.7     0     17.2    16.4   105
 MARQUETTE                8760      .0      -M      *    13.6    16.6    82
 MIDDLE POWDER            7760      .0     7.9     0     16.4    18.1    91
 OWL CREEK                8975      .0     1.4     0      6.7    10.1    66
 POWDER RIVER PASS        9480      .0     5.8     0     21.6    18.4   117
 SHELL CREEK              9580    16.2    14.8   109     21.1    19.3   109
 TIMBER CREEK             7950      .0     1.5     0     11.4    13.2    86
                                                -----                  -----
                Basin wide percent of average     57                     96


SHOSHONE RIVER

 BLACKWATER               9780    20.4    28.5    72     29.5    27.4   108
 EVENING STAR             9200    21.8    31.0    70     38.8    32.8   118
 MARQUETTE                8760      .0      -M      *    13.6    16.6    82
 SYLVAN ROAD              7120      .0     1.1     0*    22.6    22.4   101
 YOUNTS PEAK              8350     1.7    13.0    13     19.1    20.9    91
                                                -----                  -----
                Basin wide percent of average     60                    103


POWDER RIVER

 BEAR TRAP MEADOW         8200      .0      .0   100*    14.2    13.1   108
 CLOUD PEAK RESERVOIR     9860     1.4    12.8    11     20.1    20.2   100
 GRAVE SPRINGS            8550      .0     4.4     0     14.6    15.2    96
 HANSEN SAWMILL           8360      .0     1.0     0     12.2    13.0    94
 MIDDLE POWDER            7760      .0     7.9     0     16.4    18.1    91
 POWDER RIVER PASS        9480      .0     5.8     0     21.6    18.4   117
 SOLDIER PARK             8720      .0      -M      *    13.2      -M      *
                                                -----                  -----
                Basin wide percent of average      4                    101


TONGUE RIVER

 BIG GOOSE                7990      .0     7.6     0     18.3    15.4   119
 BONE SPRINGS DIV         9350    11.5    14.0    82     20.4    21.0    97
 BURGESS JUNCTION         7880      .0     7.6     0     18.0    17.6   102
 DOME LAKE                8880      .0     7.8     0     21.2    19.5   109
 LITTLE GOOSE             8870      .0      -M      *    21.6      -M      *
 SUCKER CREEK             8880      .0     8.1     0     21.6    20.3   106
 TIE CREEK                6870      .0      .5     0*    17.2    16.1   107
                                                -----                  -----
                Basin wide percent of average     25                    106


BELLE FOURCHE

 COLE CANYON              5910      .0      .1     0*    12.3    11.8   104
                                                -----                  -----
                Basin wide percent of average      0*                   104


CHEYENNE RIVER BASIN

 BLIND PARK               6890      .0      .0   100*    15.2    16.6    92
 NORTH RAPID CREEK        6130      .0      .1     0*    13.3    13.2   101
                                                -----                  -----
                Basin wide percent of average      0*                    96


UPPER N. PLATTE

 ARAPAHO RIDGE           10960      -M    22.6      *      -M    33.2      *
 BLACKHALL MTN            9820      .0      -M      *    27.0      -M      *
 COLUMBINE                9160      .0     8.7     0     22.5    31.3    72
 DIVIDE PEAK              8880      .0     9.3     0     21.4    26.5    81
 JOE WRIGHT              10120      -M    22.2      *    23.3    33.4    70
 LAPRELE CREEK            8375      .0     2.3     0     13.5    19.0    71
 NORTH FRENCH CREEK      10130     1.4    30.9     5     24.3    32.9    74
 NEVER SUMMER            10280     1.3    21.1     6     14.2    31.7    45
 OLD BATTLE              10000      -M    32.8      *      -M    43.0      *
 RAWAH                    9020      .0     9.3     0     14.3    22.1    65
 SAGE CREEK BASIN         7850      -M     5.4      *    11.7    15.4    76
 SAND LAKE               10050    15.7    33.2    47     27.4    32.8    84
 SOUTH BRUSH CREEK        8440      .0     4.5     0     14.0    22.6    62
 TOWER                   10500    15.1    49.6    30     36.2    48.6    74
 WEBBER SPRINGS           9250      .0    13.9     0     25.1    33.6    75
 WILLOW CREEK PASS        9540      -M     8.4      *    11.7    17.7    66
 ZIRKEL                   9340      .0     9.0     0     28.4    32.2    88
                                                -----                  -----
                Basin wide percent of average     17                     72


SWEETWATER

 DEER PARK                9700      .0    15.9     0     21.0    29.7    71
 LARSEN CREEK             9000      .0      -M      *    16.4      -M      *
 SOUTH PASS               9040      .0    11.0     0     15.2    25.1    61
                                                -----                  -----
                Basin wide percent of average      0                     66


LOWER N. PLATTE

 CASPER MTN.              7900      .0     8.7     0     20.6    22.7    91
 LAPRELE CREEK            8375      .0     2.3     0     13.5    19.0    71
 RENO HILL                8400      .0     7.1     0     21.5    23.4    92
 WINDY PEAK               7900      .0      .9     0     10.2    15.9    64
                                                -----                  -----
                Basin wide percent of average      0                     81


LARAMIE RIVER

 BROOKLYN LAKE           10240      .1    19.3     1     22.7    29.9    76
 CINNABAR PARK            9574      .0     7.4     0     22.5    26.0    87
 CROW CREEK               8330      .1      .5    20*    12.3    14.0    88
 DEADMAN HILL            10220      -M    16.1      *    19.3    23.5    82
 RAWAH                    9020      .0     9.3     0     14.3    22.1    65
 ROACH                    9700      .0    10.6     0     19.8    25.1    79
                                                -----                  -----
                Basin wide percent of average      0                     79


S. PLATTE

 BLACK MOUNTAIN           8920      .0      -M      *    15.1      -M      *
 CROW CREEK               8330      .1      .5    20*    12.3    14.0    88
 DEADMAN HILL            10220      -M    16.1      *    19.3    23.5    82
                                                -----                  -----
                Basin wide percent of average     20*                    84


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .0      .0   100*    13.5    20.2    67
 DIVIDE PEAK              8880      .0     9.3     0     21.4    26.5    81
 ELK RIVER                8700      .0     4.6     0     17.5    25.1    70
 LITTLE SNAKE RIVER       8915      .0      -M      *    27.1      -M      *
 OLD BATTLE              10000      -M    32.8      *      -M    43.0      *
 SAGE CREEK BASIN         7850      -M     5.4      *    11.7    15.4    76
 SANDSTONE RS             8150      .0     2.0     0     13.4    23.9    56
 WHISKEY PARK             8950      -M    22.8      *    27.2    36.7    74
                                                -----                  -----
                Basin wide percent of average      0*                    71


UPPER GREEN RIVER

 BIG SANDY OPENING        9080      .0     6.5     0     16.4    17.7    93
 BLIND BULL SUM           8650    15.7    22.9    69     19.7    27.1    73
 EAST RIM DIVIDE          7930      .0     6.7     0     13.2    15.3    86
 ELKHART PARK G.S.        9400      .0     7.4     0     17.5    18.0    97
 GROS VENTRE SUMMIT       8750      .0     7.9     0     13.6    16.8    81
 GUNSIGHT PASS            9820     4.7      -M      *    18.3      -M      *
 KENDALL R.S.             7740      .0      .5     0*    16.4    17.9    92
 LOOMIS PARK              8240      .1     7.2     1     18.5    21.7    85
 NEW FORK LAKE            8340      .1     1.6     6     13.2    15.0    88
 POCKET CREEK             9360      -M      -M      *    15.0      -M      *
 SNIDER BASIN             8060      .0     4.9     0     15.1    19.8    76
 SPRING CREEK DIVIDE      9000    12.9    21.7    59     26.1    32.2    81
 TRIPLE PEAK              8500      .0    13.1     0     28.7    30.9    93
                                                -----                  -----
                Basin wide percent of average     29                     85


LOWER GREEN RIVER

 BLACKS FORK JCT          8870      .0      -M      *    12.6      -M      *
 BUCK PASTURE             9700      .0      -M      *      .0      -M      *
 EF BLACKS FORK GS        9308      .0      -M      *    16.2      -M      *
 HAMS FORK                7840      .1      .0      *    12.1    16.3    74
 HEWINTA                  9519      .0     2.6     0     15.0    19.5    77
 HICKERSON PARK           9145      .0      .9     0     14.2    11.8   120
 HOLE-IN-ROCK             9150      .0      .7     0*    14.2    11.4   125
 INDIAN CREEK             9425     2.1    20.9    10     21.5    31.5    68
 KELLEY R.S.              8180      .0     6.5     0     17.8    25.4    70
 SPIRIT LK               10223      .0      -M      *    20.5      -M      *
 STEEL CREEK PARK        10200     4.8    16.4    29     17.0    22.2    77
                                                -----                  -----
                Basin wide percent of average     15*                    81


UPPER BEAR RIVER

 BEAR RIVER RS            8500      .0      -M      *    12.2      -M      *
 BUG LAKE                 7950      .0     7.5     0     18.6    24.3    77
 BURTS MILLER RANCH       8000      .0      -M      *    11.4      -M      *
 CHALK CREEK #1           8993      .0    18.1     0     22.8    32.4    70
 HAYDEN FORK              9212      .0     4.8     0     20.9    27.4    76
 KELLEY R.S.              8180      .0     6.5     0     17.8    25.4    70
 LILY LAKE                9156      .0     4.3     0     14.7    23.1    64
 MONTE CRISTO             8960      .0    19.4     0     22.9    32.9    70
 SALT RIVER SUMMIT        7760      -M     2.0      *    11.3    23.3    48
                                                -----                  -----
                Basin wide percent of average      0                     68

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


 -M   = Missing data
  *   = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and

Total Precipitation values

If the Basin wide percent of average 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 Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average 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.

Reference period for average conditions is 1971-2000.

Provisional data, subject to revision.