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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 SATURDAY: APRIL 30 , 2011
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    25.9    12.6   206     30.8    24.3   127
 COTTONWOOD CREEK         7670    37.4    20.1   186     45.2    31.8   142
 GRAND TARGHEE            9260    62.1      -M      *    45.2      -M      *
 GRANITE CREEK            6770    25.7    13.2   195     29.8    22.3   134
 GRASSY LAKE              7265    49.3    33.7   146     51.5    40.7   127
 GROS VENTRE SUMMIT       8750    18.6    13.4   139     19.1    15.2   126
 GUNSIGHT PASS            9820    23.7      -M      *    21.9      -M      *
 LEWIS LAKE DIVIDE        7850    55.1    34.8   158     44.5    41.5   107
 PHILLIPS BENCH           8200    40.4    29.6   136     41.5    33.0   126
 SALT RIVER SUMMIT        7760    21.1    11.0   192     26.8    21.5   125
 SNAKE RIVER STATION      6920      -M    12.6      *    33.1    25.4   130
 SPRING CREEK DIVIDE      9000    44.5    28.7   155     40.4    30.1   134
 THUMB DIVIDE             7980    29.4    15.3   192     26.9    21.9   123
 TOGWOTEE PASS            9580    37.7    27.9   135     39.2    28.8   136
 TWO OCEAN PLATEAU        9240      -M    31.8      *      -M    32.0      *
 WILLOW CREEK             8380    48.7    30.9   158     52.7    37.5   141
                                                -----                  -----
                Basin wide percent of average    160                    129


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9360    33.1    25.9   128     31.8    23.4   136
 BLACK BEAR               8170    57.7    40.1   144     54.6    45.7   119
 CANYON                   7870    21.6    11.5   188     23.3    17.6   132
 FISHER CREEK             9100    51.3    37.8   136       -M    41.7      *
 MADISON PLATEAU          7750    37.9    24.4   155     39.7    30.3   131
 NORTHEAST ENTRANCE       7350    17.1     7.4   231     19.6    14.7   133
 PARKER PEAK              9400    38.3    24.5   156       -M    19.4      *
 SYLVAN LAKE              8420    33.0    23.9   138     36.5    24.6   148
 THUMB DIVIDE             7980    29.4    15.3   192     26.9    21.9   123
 TWO OCEAN PLATEAU        9240      -M    31.8      *      -M    32.0      *
 WHISKEY CREEK            6800    24.7    15.4   160     29.2    24.1   121
 WHITE MILL               8700    36.0    26.4   136     35.5    31.1   114
 WOLVERINE                7650    17.4     7.4   235     18.4    15.1   122
                                                -----                  -----
                Basin wide percent of average    153                    127


WIND RIVER

 BURROUGHS CREEK          8750    20.6    13.8   149     21.5    19.2   112
 CASTLE CREEK             8400     7.0      -M      *    10.5      -M      *
 COLD SPRINGS             9630     9.6     4.9   196     11.5    13.8    83
 DEER PARK                9700    22.0    19.0   116     26.0    26.8    97
 HOBBS PARK              10100    19.0    18.0   106     16.8    16.8   100
 LITTLE WARM              9370    15.5    11.3   137     16.4    16.7    98
 SOUTH PASS               9040    19.2    18.1   106     16.9    22.6    75
 ST. LAWRENCE ALT         8620     3.8     6.3    60      9.7    12.0    81
 TOGWOTEE PASS            9580    37.7    27.9   135     39.2    28.8   136
 TOWNSEND CREEK           8700     9.1     9.2    99     13.4    15.4    87
                                                -----                  -----
                Basin wide percent of average    122                    100


BIGHORN BASIN

 BALD MTN.                9380    31.2    23.5   133     25.4    21.2   120
 BEAR TRAP MEADOW         8200    11.3     2.7   419     12.3    10.8   114
 BLACKWATER               9780    36.7    28.7   128     34.6    24.6   141
 BONE SPRINGS DIV         9350    27.5    18.3   150     22.1    18.2   121
 EVENING STAR             9200    41.3    33.2   124       -M    29.8      *
 GRAVE SPRINGS            8550    11.9    11.1   107     12.4    13.0    95
 KIRWIN                   9550    16.8    13.0   129     17.5    14.1   124
 MARQUETTE                8760     6.8      -M      *     9.7    13.6    71
 MIDDLE POWDER            7760    14.3    14.5    99     14.0    15.7    89
 OWL CREEK                8975     7.6     4.1   185      8.9     8.1   110
 POWDER RIVER PASS        9480    20.4    10.9   187     23.5    15.7   150
 SHELL CREEK              9580    23.9    16.9   141     21.5    16.7   129
 SYLVAN LAKE              8420    33.0    23.9   138     36.5    24.6   148
 SYLVAN ROAD              7120    17.9     8.4   213     27.0    20.4   132
 TIMBER CREEK             7950     6.2     4.9   127      8.0    10.4    77
 YOUNTS PEAK              8350    23.5    18.2   129     20.8    18.7   111
                                                -----                  -----
                Basin wide percent of average    139                    120


SHOSHONE RIVER

 BLACKWATER               9780    36.7    28.7   128     34.6    24.6   141
 EVENING STAR             9200    41.3    33.2   124       -M    29.8      *
 KIRWIN                   9550    16.8    13.0   129     17.5    14.1   124
 MARQUETTE                8760     6.8      -M      *     9.7    13.6    71
 SYLVAN LAKE              8420    33.0    23.9   138     36.5    24.6   148
 SYLVAN ROAD              7120    17.9     8.4   213     27.0    20.4   132
 YOUNTS PEAK              8350    23.5    18.2   129     20.8    18.7   111
                                                -----                  -----
                Basin wide percent of average    135                    126


POWDER-TONGUE

 BEAR TRAP MEADOW         8200    11.3     2.7   419     12.3    10.8   114
 BIG GOOSE                7990    12.8    11.7   109     14.9    12.8   116
 BONE SPRINGS DIV         9350    27.5    18.3   150     22.1    18.2   121
 BURGESS JUNCTION         7880    15.3    13.3   115     16.2    15.3   106
 CLOUD PEAK RESERVOIR     9860    21.5    16.3   132     20.1    16.9   119
 DOME LAKE                8880    18.8    13.7   137     18.4    16.7   110
 GRAVE SPRINGS            8550    11.9    11.1   107     12.4    13.0    95
 HANSEN SAWMILL           8360    10.5     5.0   210     11.9    10.9   109
 LITTLE GOOSE             8870    15.2      -M      *    19.3      -M      *
 MIDDLE POWDER            7760    14.3    14.5    99     14.0    15.7    89
 POWDER RIVER PASS        9480    20.4    10.9   187     23.5    15.7   150
 SOLDIER PARK             8720    11.6      -M      *    12.8      -M      *
 SUCKER CREEK             8880    18.1    13.2   137     20.0    17.3   116
 TIE CREEK                6870     8.4     4.2   200     14.1    13.4   105
                                                -----                  -----
                Basin wide percent of average    141                    113


BELLE FOURCHE

 BLIND PARK               6890      -M     4.0      *    21.2    14.1   150
 COLE CANYON              5910     8.9     5.2   171     16.1     9.4   171
 NORTH RAPID CREEK        6130     5.9     4.2   140     16.8    11.3   149
                                                -----                  -----
                Basin wide percent of average    157                    155


UPPER N. PLATTE RIVER

 CINNABAR PARK            9574    30.9    16.1   192     36.9    23.4   158
 COLUMBINE                9160    41.1    21.3   193     44.0    29.0   152
 DIVIDE PEAK              8880    31.8    19.6   162     36.5    24.2   151
 ELK RIVER                8700    30.2    15.4   196     34.0    22.9   148
 JOE WRIGHT              10120    47.8    25.1   190     48.0    29.9   161
 NORTH FRENCH CREEK      10130      -M    34.5      *    60.0    29.5   203
 OLD BATTLE              10000    56.8    36.8   154     47.3    39.7   119
 SAGE CREEK BASIN         7850    19.0    11.4   167     23.9    14.0   171
 SOUTH BRUSH CREEK        8440    24.9    11.3   220     30.3    20.0   152
 TOWER                   10500    72.4    52.1   139     47.7    44.9   106
 WEBBER SPRINGS           9250    39.4    25.3   156     45.9    31.0   148
 WILLOW CREEK PASS        9540    26.9    14.2   189     24.6    15.6   158
                                                -----                  -----
                Basin wide percent of average    169                    148


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    42.1    28.3   149     38.0    26.8   142
 CASPER MTN.              7900    13.4    17.3    77     18.4    19.4    95
 DEADMAN HILL            10220    31.2    19.6   159     30.7    20.8   148
 DEER PARK                9700    22.0    19.0   116     26.0    26.8    97
 LAPRELE CREEK            8375    14.7     7.4   199     17.7    16.3   109
 RENO HILL                8400    18.4    15.0   123     21.9    20.0   110
 ROACH                    9700    28.1    18.6   151     31.3    22.3   140
 SAND LAKE               10050    49.3    36.9   134       -M    29.1      *
 SOUTH PASS               9040    19.2    18.1   106     16.9    22.6    75
 WINDY PEAK               7900    10.0     5.2   192     16.5    13.4   123
                                                -----                  -----
                Basin wide percent of average    134                    115


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      -M     4.9      *    21.6    18.5   117
 DIVIDE PEAK              8880    31.8    19.6   162     36.5    24.2   151
 OLD BATTLE              10000    56.8    36.8   154     47.3    39.7   119
 SANDSTONE RS             8150    23.0     9.8   235     33.5    21.8   154
 WHISKEY PARK             8950      -M    30.6      *    52.5    33.6   156
                                                -----                  -----
                Basin wide percent of average    169                    139


UPPER GREEN RIVER

 BIG SANDY OPENING        9080    19.4    13.7   142     19.6    15.8   124
 BLIND BULL SUM           8650    43.5    28.0   155     28.9    25.1   115
 EAST RIM DIVIDE          7930    17.1    13.3   129     16.7    13.8   121
 ELKHART PARK G.S.        9400    17.6    13.0   135     17.4    15.9   109
 GROS VENTRE SUMMIT       8750    18.6    13.4   139     19.1    15.2   126
 GUNSIGHT PASS            9820    23.7      -M      *    21.9      -M      *
 KENDALL R.S.             7740    14.6    10.3   142     19.5    16.5   118
 LOOMIS PARK              8240    25.1    14.6   172     26.6    19.9   134
 NEW FORK LAKE            8340    14.9     8.7   171     14.0    13.3   105
 POCKET CREEK             9360    17.1      -M      *    18.6      -M      *
 SNIDER BASIN             8060    24.1    12.9   187     23.1    18.5   125
 SPRING CREEK DIVIDE      9000    44.5    28.7   155     40.4    30.1   134
 TRIPLE PEAK              8500    42.3    24.0   176     42.8    28.5   150
                                                -----                  -----
                Basin wide percent of average    156                    126


LOWER GREEN RIVER

 HAMS FORK                7840    17.5     6.3   278     18.9    14.7   129
 HEWINTA                  9519    17.5     9.5   184     22.9    17.7   129
 HICKERSON PARK           9145     4.7     5.9    80     12.7    10.1   126
 HOLE-IN-ROCK             9150     8.9     5.0   178     14.4     9.7   148
 INDIAN CREEK             9425    40.3    28.5   141     33.6    29.3   115
 KELLEY R.S.              8180    26.3    14.4   183     29.7    23.5   126
 STEEL CREEK PARK        10200    24.7    18.6   133     26.8    20.1   133
                                                -----                  -----
                Basin wide percent of average    159                    127


UPPER BEAR RIVER

 BUG LAKE                 7950      -M    18.4      *      -M    22.3      *
 HAYDEN FORK              9212      -M    13.3      *    37.7    25.0   151
 KELLEY R.S.              8180    26.3    14.4   183     29.7    23.5   126
 LILY LAKE                9156    27.6    11.4   242     28.7    21.0   137
 MONTE CRISTO             8960    48.9    28.5   172     46.5    30.1   154
 SALT RIVER SUMMIT        7760    21.1    11.0   192     26.8    21.5   125
 TRIAL LAKE               9992    47.1    26.5   178     42.3    29.3   144
                                                -----                  -----
                Basin wide percent of average    186                    141

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


 -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.