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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 TUESDAY: MAY 1 , 2012
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030     6.0    12.3    49     26.1    24.4   107
 BLACK BEAR               8170    42.1    39.9   106     48.8    45.8   107
 BLIND BULL SUM           8650    23.9    27.9    86     19.0    25.2    75
 COTTONWOOD CREEK         7670    13.0    19.8    66     28.0    31.9    88
 EAST RIM DIVIDE          7930      .1    13.2     1     12.5    13.9    90
 GRAND TARGHEE            9260    37.6      -M      *    33.7      -M      *
 GRANITE CREEK            6770     4.0    12.8    31     18.3    22.4    82
 GRASSY LAKE              7265    27.0    33.4    81     43.3    40.9   106
 GROS VENTRE SUMMIT       8750     2.0    13.3    15     12.3    15.3    80
 GUNSIGHT PASS            9820     9.8      -M      *    16.6      -M      *
 LEWIS LAKE DIVIDE        7850    28.7    34.6    83     39.7    41.6    95
 PHILLIPS BENCH           8200    19.5    29.4    66     28.2    33.1    85
 SALT RIVER SUMMIT        7760      .0    10.6     0     11.9    21.6    55
 SNAKE RIVER STATION      6920     3.8    12.2    31     27.6    25.5   108
 SPRING CREEK DIVIDE      9000    21.8    28.6    76     25.0    30.2    83
 THUMB DIVIDE             7980     9.8    14.9    66     21.7    22.0    99
 TOGWOTEE PASS            9580    20.9    27.9    75     27.1    29.0    93
 TWO OCEAN PLATEAU        9240    36.4    31.8   114     32.3    32.1   101
 WILLOW CREEK             8380    18.2    30.6    59     37.0    37.7    98
 YOUNTS PEAK              8350    13.5    18.1    75     18.0    18.8    96
                                                -----                  -----
                Basin wide percent of average     71                     93


MADISON-GALLATIN

 BLACK BEAR               8170    42.1    39.9   106     48.8    45.8   107
 CANYON                   7870     9.3    11.3    82     18.2    17.7   103
 MADISON PLATEAU          7750    25.0    24.2   103     36.6    30.4   120
 WEST YELLOWSTONE         6700      .0     6.1     0     20.7    15.0   138
 WHISKEY CREEK            6800    12.9    15.2    85     27.6    24.2   114
                                                -----                  -----
                Basin wide percent of average     92                    114


YELLOWSTONE

 BEARTOOTH LAKE           9360    26.9    25.9   104     28.3    23.5   120
 BURNT MTN                5880      .0     1.0     0     14.2    20.2    70
 CANYON                   7870     9.3    11.3    82     18.2    17.7   103
 COLE CREEK               7850    12.8    19.7    65     14.5    21.9    66
 EVENING STAR             9200    30.0    33.3    90     36.8    29.9   123
 FISHER CREEK             9100    39.7    37.8   105     41.6    41.9    99
 NORTHEAST ENTRANCE       7350      .5     7.1     7     16.3    14.8   110
 PARKER PEAK              9400    24.0    24.5    98     26.9    19.5   138
 SYLVAN LAKE              8420    14.7    23.8    62     29.6    24.7   120
 THUMB DIVIDE             7980     9.8    14.9    66     21.7    22.0    99
 TWO OCEAN PLATEAU        9240    36.4    31.8   114     32.3    32.1   101
 WHITE MILL               8700    26.2    26.4    99     29.1    31.2    93
 WOLVERINE                7650      .0     7.2     0     14.4    15.2    95
                                                -----                  -----
                Basin wide percent of average     87                    103


WIND RIVER

 BURROUGHS CREEK          8750    11.2    13.6    82     15.3    19.3    79
 CASTLE CREEK             8400      .0      -M      *     9.2      -M      *
 COLD SPRINGS             9630      .0     4.8     0      9.9    13.9    71
 DEER PARK                9700     7.1    18.6    38     19.6    27.0    73
 HOBBS PARK              10100     9.6    18.0    53     15.1    16.9    89
 KIRWIN                   9550     6.8    13.0    52     15.7    14.2   111
 LITTLE WARM              9370      .4    11.1     4     13.2    16.8    79
 OWL CREEK                8975      .0     4.0     0      5.9     8.2    72
 SOUTH PASS               9040     7.4    18.0    41     14.8    22.7    65
 ST. LAWRENCE ALT         8620      .0     6.1     0      8.5    12.1    70
 TOGWOTEE PASS            9580    20.9    27.9    75     27.1    29.0    93
 TOWNSEND CREEK           8700      .0     9.1     0     12.8    15.5    83
                                                -----                  -----
                Basin wide percent of average     44                     81


BIGHORN BASIN

 BALD MTN.                9380    23.2    23.6    98     18.9    21.3    89
 BEAR TRAP MEADOW         8200      .0     2.5     0     11.3    10.9   104
 BONE SPRINGS DIV         9350    19.0    18.3   104     18.8    18.3   103
 GRAVE SPRINGS            8550     3.7    11.1    33     13.3    13.1   102
 KIRWIN                   9550     6.8    13.0    52     15.7    14.2   111
 MARQUETTE                8760     4.0      -M      *    12.9    13.7    94
 MIDDLE POWDER            7760     6.2    14.3    43     13.4    15.8    85
 OWL CREEK                8975      .0     4.0     0      5.9     8.2    72
 POWDER RIVER PASS        9480     6.1    10.7    57     19.1    15.8   121
 SHELL CREEK              9580    20.4    16.8   121     20.0    16.8   119
 TIMBER CREEK             7950      .0     4.8     0      9.6    10.5    91
                                                -----                  -----
                Basin wide percent of average     72                    100


SHOSHONE RIVER

 BLACKWATER               9780    25.3    28.8    88     27.5    24.7   111
 EVENING STAR             9200    30.0    33.3    90     36.8    29.9   123
 MARQUETTE                8760     4.0      -M      *    12.9    13.7    94
 SYLVAN ROAD              7120      .0     8.1     0     21.4    20.5   104
 YOUNTS PEAK              8350    13.5    18.1    75     18.0    18.8    96
                                                -----                  -----
                Basin wide percent of average     78                    108


POWDER RIVER

 BEAR TRAP MEADOW         8200      .0     2.5     0     11.3    10.9   104
 CLOUD PEAK RESERVOIR     9860    11.3    16.2    70     18.4    17.1   108
 GRAVE SPRINGS            8550     3.7    11.1    33     13.3    13.1   102
 HANSEN SAWMILL           8360      .0     4.9     0     10.0    11.0    91
 MIDDLE POWDER            7760     6.2    14.3    43     13.4    15.8    85
 POWDER RIVER PASS        9480     6.1    10.7    57     19.1    15.8   121
 SOLDIER PARK             8720      .0      -M      *    11.8      -M      *
                                                -----                  -----
                Basin wide percent of average     46                    102


TONGUE RIVER

 BIG GOOSE                7990     3.0    11.6    26     16.5    12.9   128
 BONE SPRINGS DIV         9350    19.0    18.3   104     18.8    18.3   103
 BURGESS JUNCTION         7880     8.6    13.3    65     16.1    15.4   105
 DOME LAKE                8880    10.6    13.5    79     19.0    16.8   113
 LITTLE GOOSE             8870     1.7      -M      *    19.8      -M      *
 SUCKER CREEK             8880     8.1    13.0    62     18.5    17.4   106
 TIE CREEK                6870      .0     3.9     0     16.0    13.5   119
                                                -----                  -----
                Basin wide percent of average     67                    111


BELLE FOURCHE

 COLE CANYON              5910      .9     5.0    18     11.1     9.5   117
                                                -----                  -----
                Basin wide percent of average     18                    117


CHEYENNE RIVER BASIN

 BLIND PARK               6890      .0     4.0     0     13.0    14.2    92
 NORTH RAPID CREEK        6130      .0     3.8     0     10.3    11.4    90
                                                -----                  -----
                Basin wide percent of average      0                     91


UPPER N. PLATTE

 ARAPAHO RIDGE           10960    11.5    26.0    44     19.0    30.9    61
 BLACKHALL MTN            9820    16.2      -M      *    25.7      -M      *
 COLUMBINE                9160      -M    20.9      *    22.3    29.2    76
 DIVIDE PEAK              8880      -M    19.3      *    20.4    24.3    84
 JOE WRIGHT              10120     9.1    25.1    36     21.4    30.1    71
 LAPRELE CREEK            8375      .0     7.1     0     13.3    16.5    81
 NORTH FRENCH CREEK      10130    14.0    34.5    41     22.1    29.7    74
 NEVER SUMMER            10280    10.2    23.8    43     12.7    28.6    44
 OLD BATTLE              10000    22.8    36.9    62     29.7    39.9    74
 RAWAH                    9020      .0    16.3     0     13.5    19.7    69
 SAGE CREEK BASIN         7850      -M    11.2      *    11.3    14.1    80
 SAND LAKE               10050    22.6    37.0    61     25.9    29.3    88
 SOUTH BRUSH CREEK        8440      .0    11.0     0     12.8    20.1    64
 TOWER                   10500    26.2    52.2    50     35.2    45.1    78
 WEBBER SPRINGS           9250      -M    25.1      *    23.7    31.1    76
 WILLOW CREEK PASS        9540      -M    14.2      *    10.9    15.7    69
 ZIRKEL                   9340      .0    21.5     0     26.9    30.0    90
                                                -----                  -----
                Basin wide percent of average     40                     74


SWEETWATER

 DEER PARK                9700     7.1    18.6    38     19.6    27.0    73
 LARSEN CREEK             9000      .1      -M      *    15.5      -M      *
 SOUTH PASS               9040     7.4    18.0    41     14.8    22.7    65
                                                -----                  -----
                Basin wide percent of average     40                     69


LOWER N. PLATTE

 CASPER MTN.              7900     9.0    17.1    53     20.4    19.5   105
 LAPRELE CREEK            8375      .0     7.1     0     13.3    16.5    81
 RENO HILL                8400     7.9    14.7    54     21.0    20.2   104
 WINDY PEAK               7900      .0     4.9     0      9.9    13.5    73
                                                -----                  -----
                Basin wide percent of average     39                     93


LARAMIE RIVER

 BROOKLYN LAKE           10240     8.3    28.2    29     21.0    27.0    78
 CINNABAR PARK            9574     4.4    16.0    28     21.3    23.6    90
 CROW CREEK               8330      .1     5.4     2     11.9    12.2    98
 DEADMAN HILL            10220    13.6    19.7    69     17.9    21.0    85
 RAWAH                    9020      .0    16.3     0     13.5    19.7    69
 ROACH                    9700     5.8    18.5    31     18.7    22.4    83
                                                -----                  -----
                Basin wide percent of average     31                     83


S. PLATTE

 BLACK MOUNTAIN           8920      .0      -M      *    13.8      -M      *
 CROW CREEK               8330      .1     5.4     2     11.9    12.2    98
 DEADMAN HILL            10220    13.6    19.7    69     17.9    21.0    85
                                                -----                  -----
                Basin wide percent of average     55                     90


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .0     4.6     0     13.1    18.6    70
 DIVIDE PEAK              8880      -M    19.3      *    20.4    24.3    84
 ELK RIVER                8700      -M    15.0      *    16.9    23.0    73
 LITTLE SNAKE RIVER       8915      .9      -M      *    25.9      -M      *
 OLD BATTLE              10000    22.8    36.9    62     29.7    39.9    74
 SAGE CREEK BASIN         7850      -M    11.2      *    11.3    14.1    80
 SANDSTONE RS             8150      .0     9.5     0     13.1    21.9    60
 WHISKEY PARK             8950      -M    30.5      *    26.6    33.8    79
                                                -----                  -----
                Basin wide percent of average     45*                    75


UPPER GREEN RIVER

 BIG SANDY OPENING        9080     8.8    13.5    65     15.4    15.9    97
 BLIND BULL SUM           8650    23.9    27.9    86     19.0    25.2    75
 EAST RIM DIVIDE          7930      .1    13.2     1     12.5    13.9    90
 ELKHART PARK G.S.        9400    10.7    12.8    84     16.8    16.0   105
 GROS VENTRE SUMMIT       8750     2.0    13.3    15     12.3    15.3    80
 GUNSIGHT PASS            9820     9.8      -M      *    16.6      -M      *
 KENDALL R.S.             7740     1.7    10.0    17     15.6    16.6    94
 LOOMIS PARK              8240     2.1    14.3    15     17.9    19.9    90
 NEW FORK LAKE            8340      .9     8.4    11     12.2    13.4    91
 POCKET CREEK             9360     7.6      -M      *    13.8      -M      *
 SNIDER BASIN             8060     2.6    12.6    21     14.4    18.5    78
 SPRING CREEK DIVIDE      9000    21.8    28.6    76     25.0    30.2    83
 TRIPLE PEAK              8500    11.1    23.7    47     27.8    28.6    97
                                                -----                  -----
                Basin wide percent of average     48                     88


LOWER GREEN RIVER

 BLACKS FORK JCT          8870      .0      -M      *    12.3      -M      *
 BUCK PASTURE             9700      .0      -M      *      .0      -M      *
 EF BLACKS FORK GS        9308      .0      -M      *     9.8      -M      *
 HAMS FORK                7840      .2     6.0     3     11.3    14.7    77
 HEWINTA                  9519      .0     9.3     0     14.5    17.8    81
 HICKERSON PARK           9145      .0     5.7     0     14.1    10.2   138
 HOLE-IN-ROCK             9150      .0     4.7     0     14.0     9.7   144
 INDIAN CREEK             9425    13.9    28.3    49     20.2    29.5    68
 KELLEY R.S.              8180     6.2    14.1    44     17.5    23.6    74
 SPIRIT LK               10223      .8      -M      *    20.0      -M      *
 STEEL CREEK PARK        10200     4.6    18.6    25     16.6    20.2    82
                                                -----                  -----
                Basin wide percent of average     29                     86


UPPER BEAR RIVER

 BEAR RIVER RS            8500      .0      -M      *    11.7      -M      *
 BUG LAKE                 7950     7.4    18.0    41     17.9    22.4    80
 BURTS MILLER RANCH       8000      .0      -M      *    10.2      -M      *
 CHALK CREEK #1           8993     9.3    25.3    37     21.9    30.1    73
 HAYDEN FORK              9212      .0    13.0     0     20.4    25.1    81
 KELLEY R.S.              8180     6.2    14.1    44     17.5    23.6    74
 LILY LAKE                9156      .0    11.1     0     14.2    21.1    67
 MONTE CRISTO             8960    10.3    28.3    36     22.4    30.3    74
 SALT RIVER SUMMIT        7760      .0    10.6     0     11.9    21.6    55
                                                -----                  -----
                Basin wide percent of average     28                     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.