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

wrds@uwyo.edu
Ph (307) 766-6651
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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 WEDNESDAY: APRIL 18 , 2012
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    12.7    16.2    78     25.2    23.2   109
 BLACK BEAR               8170    42.4    41.0   103     45.7    43.8   104
 BLIND BULL SUM           8650    24.1    28.9    83     17.8    24.1    74
 COTTONWOOD CREEK         7670    15.7    23.3    67     25.6    30.2    85
 EAST RIM DIVIDE          7930     3.6    14.0    26     12.0    13.1    92
 GRAND TARGHEE            9260    38.6      -M      *    31.7      -M      *
 GRANITE CREEK            6770      -M    16.4      *      -M    21.3      *
 GRASSY LAKE              7265    32.8    36.8    89     40.9    39.0   105
 GROS VENTRE SUMMIT       8750     7.4    14.5    51     11.4    14.3    80
 GUNSIGHT PASS            9820    11.7      -M      *    15.3      -M      *
 LEWIS LAKE DIVIDE        7850    32.8    36.6    90     37.4    39.8    94
 PHILLIPS BENCH           8200    22.9    30.7    75     26.6    31.5    84
 SALT RIVER SUMMIT        7760     6.5    13.9    47     11.5    20.5    56
 SNAKE RIVER STATION      6920    11.6    16.8    69     26.3    24.3   108
 SPRING CREEK DIVIDE      9000    23.1    28.7    80     23.3    28.8    81
 THUMB DIVIDE             7980    15.0    18.2    82     19.9    20.7    96
 TOGWOTEE PASS            9580    22.4    27.0    83     25.4    27.2    93
 TWO OCEAN PLATEAU        9240    36.1    30.9   117     29.7    30.3    98
 WILLOW CREEK             8380    20.7    31.9    65     33.5    35.4    95
 YOUNTS PEAK              8350    15.8    18.2    87     16.6    17.7    94
                                                -----                  -----
                Basin wide percent of average     81                     92


MADISON-GALLATIN

 BLACK BEAR               8170    42.4    41.0   103     45.7    43.8   104
 CANYON                   7870    12.2    13.4    91     16.8    16.8   100
 MADISON PLATEAU          7750    27.8    25.9   107     34.0    29.2   116
 WEST YELLOWSTONE         6700     5.5    10.3    53     18.9    14.2   133
 WHISKEY CREEK            6800    16.7    17.6    95     25.7    22.9   112
                                                -----                  -----
                Basin wide percent of average     97                    111


YELLOWSTONE

 BEARTOOTH LAKE           9360    27.0    25.5   106     26.2    22.1   119
 BURNT MTN                5880      .0     4.8     0     13.8    18.0    77
 CANYON                   7870    12.2    13.4    91     16.8    16.8   100
 COLE CREEK               7850    16.2    18.7    87     13.8    19.5    71
 EVENING STAR             9200    31.1    32.3    96     34.5    28.0   123
 FISHER CREEK             9100    38.6    37.2   104     38.2    39.7    96
 NORTHEAST ENTRANCE       7350     5.6    10.1    55     14.6    13.9   105
 PARKER PEAK              9400    26.6    23.6   113     25.1    18.1   139
 SYLVAN LAKE              8420    17.9    24.2    74     26.8    23.1   116
 THUMB DIVIDE             7980    15.0    18.2    82     19.9    20.7    96
 TWO OCEAN PLATEAU        9240    36.1    30.9   117     29.7    30.3    98
 WHITE MILL               8700    26.0    26.1   100     26.6    29.5    90
 WOLVERINE                7650     3.4    10.4    33     14.0    14.1    99
                                                -----                  -----
                Basin wide percent of average     93                    102


WIND RIVER

 BURROUGHS CREEK          8750    13.8    15.0    92     14.6    18.0    81
 CASTLE CREEK             8400      .0      -M      *     8.9      -M      *
 COLD SPRINGS             9630      .0     6.3     0      9.6    12.4    77
 DEER PARK                9700    10.7    17.5    61     19.2    24.6    78
 HOBBS PARK              10100    13.9    16.9    82     14.5    15.1    96
 KIRWIN                   9550    12.0    12.4    97     15.0    12.8   117
 LITTLE WARM              9370     7.0    12.4    56     12.2    15.2    80
 OWL CREEK                8975      .0     5.0     0      5.7     7.1    80
 SOUTH PASS               9040    12.9    17.7    73     14.6    20.8    70
 ST. LAWRENCE ALT         8620      .0     7.0     0      8.3    10.5    79
 TOGWOTEE PASS            9580    22.4    27.0    83     25.4    27.2    93
 TOWNSEND CREEK           8700     4.6     9.6    48     12.1    13.8    88
                                                -----                  -----
                Basin wide percent of average     66                     85


BIGHORN BASIN

 BALD MTN.                9380    22.6    22.1   102     17.0    19.5    87
 BEAR TRAP MEADOW         8200     1.5     4.1    37     10.3     9.7   106
 BONE SPRINGS DIV         9350    21.1    17.6   120     17.5    16.6   105
 GRAVE SPRINGS            8550     6.8    10.7    64     12.0    11.7   103
 KIRWIN                   9550    12.0    12.4    97     15.0    12.8   117
 MARQUETTE                8760     7.5      -M      *    12.5    11.8   106
 MIDDLE POWDER            7760    10.0    14.0    71     12.5    14.2    88
 OWL CREEK                8975      .0     5.0     0      5.7     7.1    80
 POWDER RIVER PASS        9480     9.4    11.8    80     17.1    14.2   120
 SHELL CREEK              9580    19.9    16.2   123     17.8    15.2   117
 TIMBER CREEK             7950      .0     5.5     0      9.6     8.9   108
                                                -----                  -----
                Basin wide percent of average     87                    104


SHOSHONE RIVER

 BLACKWATER               9780    26.1    27.1    96     26.1    23.0   113
 EVENING STAR             9200    31.1    32.3    96     34.5    28.0   123
 MARQUETTE                8760     7.5      -M      *    12.5    11.8   106
 SYLVAN ROAD              7120     1.2    11.5    10     19.5    19.3   101
 YOUNTS PEAK              8350    15.8    18.2    87     16.6    17.7    94
                                                -----                  -----
                Basin wide percent of average     83                    109


POWDER RIVER

 BEAR TRAP MEADOW         8200     1.5     4.1    37     10.3     9.7   106
 CLOUD PEAK RESERVOIR     9860    14.7    15.4    95     17.2    15.1   114
 GRAVE SPRINGS            8550     6.8    10.7    64     12.0    11.7   103
 HANSEN SAWMILL           8360      .7     5.8    12      9.7     9.6   101
 MIDDLE POWDER            7760    10.0    14.0    71     12.5    14.2    88
 POWDER RIVER PASS        9480     9.4    11.8    80     17.1    14.2   120
 SOLDIER PARK             8720     5.8      -M      *    11.6      -M      *
                                                -----                  -----
                Basin wide percent of average     70                    106


TONGUE RIVER

 BIG GOOSE                7990     8.0    12.5    64     16.1    11.0   146
 BONE SPRINGS DIV         9350    21.1    17.6   120     17.5    16.6   105
 BURGESS JUNCTION         7880    12.4    13.2    94     15.2    13.9   109
 DOME LAKE                8880    13.1    13.8    95     16.8    15.1   111
 LITTLE GOOSE             8870     7.6      -M      *    18.4      -M      *
 SUCKER CREEK             8880    11.4    13.4    85     17.1    15.6   110
 TIE CREEK                6870      .7     5.4    13     14.9    11.8   126
                                                -----                  -----
                Basin wide percent of average     88                    116


BELLE FOURCHE

 COLE CANYON              5910      .0     7.0     0      9.3     7.9   118
                                                -----                  -----
                Basin wide percent of average      0                    118


CHEYENNE RIVER BASIN

 BLIND PARK               6890      .0     7.0     0     11.2    12.7    88
 NORTH RAPID CREEK        6130      .0     8.5     0      9.5     9.8    97
                                                -----                  -----
                Basin wide percent of average      0                     92


UPPER N. PLATTE

 ARAPAHO RIDGE           10960    13.4    25.1    53     17.7    29.2    61
 BLACKHALL MTN            9820    20.0      -M      *    24.7      -M      *
 COLUMBINE                9160      -M    24.3      *    20.4    27.6    74
 DIVIDE PEAK              8880     6.7    20.9    32     20.1    22.8    88
 JOE WRIGHT              10120    10.7    24.0    45     20.4    27.8    73
 LAPRELE CREEK            8375     1.6     9.8    16     13.2    14.6    90
 NORTH FRENCH CREEK      10130    16.4    33.1    50     21.0    27.4    77
 NEVER SUMMER            10280    11.0    22.8    48     11.9    26.4    45
 OLD BATTLE              10000    23.6    35.1    67     28.5    37.7    76
 RAWAH                    9020      .4    16.2     2     12.3    18.3    67
 SAGE CREEK BASIN         7850      -M    12.1      *    11.2    13.2    85
 SAND LAKE               10050    23.8    35.4    67     24.9    27.1    92
 SOUTH BRUSH CREEK        8440      -M    13.1      *    12.2    18.5    66
 TOWER                   10500    27.6    50.2    55     32.6    42.4    77
 WEBBER SPRINGS           9250    11.6    26.1    44     22.8    29.3    78
 WILLOW CREEK PASS        9540      -M    13.9      *    10.1    14.4    70
 ZIRKEL                   9340      -M    25.0      *    25.4    28.4    89
                                                -----                  -----
                Basin wide percent of average     49                     75


SWEETWATER

 DEER PARK                9700    10.7    17.5    61     19.2    24.6    78
 LARSEN CREEK             9000     5.9      -M      *    15.3      -M      *
 SOUTH PASS               9040    12.9    17.7    73     14.6    20.8    70
                                                -----                  -----
                Basin wide percent of average     67                     74


LOWER N. PLATTE

 CASPER MTN.              7900    15.0    17.1    88     19.6    17.2   114
 LAPRELE CREEK            8375     1.6     9.8    16     13.2    14.6    90
 RENO HILL                8400    13.6    16.0    85     20.1    17.8   113
 WINDY PEAK               7900      .3     7.6     4      9.7    12.1    80
                                                -----                  -----
                Basin wide percent of average     60                    101


LARAMIE RIVER

 BROOKLYN LAKE           10240    13.4    27.0    50     20.3    24.9    82
 CINNABAR PARK            9574     9.3    17.6    53     20.6    21.9    94
 CROW CREEK               8330      .1     9.4     1     10.7    11.3    95
 DEADMAN HILL            10220    16.7    18.7    89     17.1    19.2    89
 RAWAH                    9020      .4    16.2     2     12.3    18.3    67
 ROACH                    9700    10.8    18.4    59     17.7    20.8    85
                                                -----                  -----
                Basin wide percent of average     47                     85


S. PLATTE

 BLACK MOUNTAIN           8920     6.6      -M      *    13.2      -M      *
 CROW CREEK               8330      .1     9.4     1     10.7    11.3    95
 DEADMAN HILL            10220    16.7    18.7    89     17.1    19.2    89
                                                -----                  -----
                Basin wide percent of average     60                     91


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .0     8.0     0     12.7    17.4    73
 DIVIDE PEAK              8880     6.7    20.9    32     20.1    22.8    88
 ELK RIVER                8700      -M    19.2      *    16.2    21.6    75
 LITTLE SNAKE RIVER       8915     9.7      -M      *    25.4      -M      *
 OLD BATTLE              10000    23.6    35.1    67     28.5    37.7    76
 SAGE CREEK BASIN         7850      -M    12.1      *    11.2    13.2    85
 SANDSTONE RS             8150      -M    12.9      *    12.6    20.4    62
 WHISKEY PARK             8950    14.3    30.6    47     25.1    31.5    80
                                                -----                  -----
                Basin wide percent of average     47                     77


UPPER GREEN RIVER

 BIG SANDY OPENING        9080    13.3    15.2    88     15.0    14.7   102
 BLIND BULL SUM           8650    24.1    28.9    83     17.8    24.1    74
 EAST RIM DIVIDE          7930     3.6    14.0    26     12.0    13.1    92
 ELKHART PARK G.S.        9400    13.7    14.0    98     16.0    14.8   108
 GROS VENTRE SUMMIT       8750     7.4    14.5    51     11.4    14.3    80
 GUNSIGHT PASS            9820    11.7      -M      *    15.3      -M      *
 KENDALL R.S.             7740     8.4    13.2    64     15.3    15.7    97
 LOOMIS PARK              8240     8.1    16.8    48     17.2    18.9    91
 NEW FORK LAKE            8340     6.8    11.0    62     11.5    12.5    92
 POCKET CREEK             9360    10.3      -M      *    13.3      -M      *
 SNIDER BASIN             8060     8.3    14.7    56     13.3    17.7    75
 SPRING CREEK DIVIDE      9000    23.1    28.7    80     23.3    28.8    81
 TRIPLE PEAK              8500    15.1    25.9    58     25.7    27.1    95
                                                -----                  -----
                Basin wide percent of average     67                     88


LOWER GREEN RIVER

 BLACKS FORK JCT          8870      .0      -M      *    11.9      -M      *
 BUCK PASTURE             9700      .1      -M      *     5.0      -M      *
 EF BLACKS FORK GS        9308      .0      -M      *    10.3      -M      *
 HAMS FORK                7840     1.3     9.4    14     10.3    13.6    76
 HEWINTA                  9519     4.4    12.0    37     13.8    16.5    84
 HICKERSON PARK           9145     1.0     8.1    12     13.8     9.2   150
 HOLE-IN-ROCK             9150     4.0     7.0    57     13.8     8.7   159
 INDIAN CREEK             9425    17.8    29.6    60     18.9    28.0    68
 KELLEY R.S.              8180    10.9    16.9    64     16.1    22.3    72
 SPIRIT LK               10223     8.3      -M      *    19.7      -M      *
 STEEL CREEK PARK        10200    12.7    17.6    72     15.9    18.7    85
                                                -----                  -----
                Basin wide percent of average     52                     88


UPPER BEAR RIVER

 BEAR RIVER RS            8500      .0      -M      *    11.2      -M      *
 BUG LAKE                 7950    12.7    21.4    59     16.6    21.1    79
 BURTS MILLER RANCH       8000      .4      -M      *     9.6      -M      *
 CHALK CREEK #1           8993    13.4    25.9    52     20.5    28.1    73
 HAYDEN FORK              9212     3.3    16.1    20     19.5    23.5    83
 KELLEY R.S.              8180    10.9    16.9    64     16.1    22.3    72
 LILY LAKE                9156     4.9    14.1    35     13.4    19.7    68
 MONTE CRISTO             8960    15.3    30.4    50     20.8    28.3    73
 SALT RIVER SUMMIT        7760     6.5    13.9    47     11.5    20.5    56
                                                -----                  -----
                Basin wide percent of average     48                     72

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


 -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.