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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 2 , 2011
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    26.3    11.9   221     31.0    24.5   127
 COTTONWOOD CREEK         7670    37.2    19.4   192     45.2    32.1   141
 GRAND TARGHEE            9260    62.5      -M      *    45.7      -M      *
 GRANITE CREEK            6770    25.7    12.5   206     29.8    22.5   132
 GRASSY LAKE              7265    49.5    33.0   150     51.5    41.0   126
 GROS VENTRE SUMMIT       8750    18.6    13.1   142     19.1    15.3   125
 GUNSIGHT PASS            9820    23.8      -M      *    21.9      -M      *
 LEWIS LAKE DIVIDE        7850    55.1    34.3   161     44.6    41.8   107
 PHILLIPS BENCH           8200    40.4    29.2   138     41.7    33.2   126
 SALT RIVER SUMMIT        7760    21.3    10.3   207     26.8    21.7   124
 SNAKE RIVER STATION      6920      -M    11.8      *    33.1    25.6   129
 SPRING CREEK DIVIDE      9000    44.4    28.4   156     40.4    30.3   133
 THUMB DIVIDE             7980    29.3    14.6   201     26.9    22.1   122
 TOGWOTEE PASS            9580    37.8    28.0   135     39.3    29.1   135
 TWO OCEAN PLATEAU        9240      -M    31.8      *      -M    32.2      *
 WILLOW CREEK             8380    48.6    30.4   160     52.7    37.9   139
                                                -----                  -----
                Basin wide percent of average    164                    128


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9360    33.3    25.9   129     32.1    23.6   136
 BLACK BEAR               8170    57.6    39.8   145     55.7    46.0   121
 CANYON                   7870    21.7    11.0   197     23.4    17.8   131
 FISHER CREEK             9100    51.4    37.7   136     48.7    42.1   116
 MADISON PLATEAU          7750    38.0    24.0   158     39.7    30.5   130
 NORTHEAST ENTRANCE       7350    17.2     6.7   257     19.6    14.9   132
 PARKER PEAK              9400    38.3    24.5   156     32.5    19.6   166
 SYLVAN LAKE              8420    33.2    23.5   141     36.7    24.8   148
 THUMB DIVIDE             7980    29.3    14.6   201     26.9    22.1   122
 TWO OCEAN PLATEAU        9240      -M    31.8      *      -M    32.2      *
 WHISKEY CREEK            6800    24.7    14.9   166     29.3    24.3   121
 WHITE MILL               8700    36.1    26.3   137     35.8    31.3   114
 WOLVERINE                7650    17.3     6.9   251     18.5    15.3   121
                                                -----                  -----
                Basin wide percent of average    156                    128


WIND RIVER

 BURROUGHS CREEK          8750    20.7    13.4   154     21.6    19.4   111
 CASTLE CREEK             8400     6.9      -M      *    10.5      -M      *
 COLD SPRINGS             9630     9.4     4.8   196     11.6    14.0    83
 DEER PARK                9700    22.3    18.5   121     26.2    27.1    97
 HOBBS PARK              10100    19.1    18.0   106     17.0    17.1    99
 LITTLE WARM              9370    15.8    10.8   146     16.5    16.9    98
 SOUTH PASS               9040    19.4    17.8   109     17.1    22.8    75
 ST. LAWRENCE ALT         8620     3.4     6.0    57      9.8    12.2    80
 TOGWOTEE PASS            9580    37.8    28.0   135     39.3    29.1   135
 TOWNSEND CREEK           8700     9.3     8.8   106     13.6    15.6    87
                                                -----                  -----
                Basin wide percent of average    125                     99


BIGHORN BASIN

 BALD MTN.                9380    32.5    23.5   138     26.2    21.5   122
 BEAR TRAP MEADOW         8200    11.6     2.3   504     12.5    11.0   114
 BLACKWATER               9780    36.7    28.9   127     34.6    24.8   140
 BONE SPRINGS DIV         9350    28.2    18.3   154     22.7    18.4   123
 EVENING STAR             9200    41.7    33.3   125     43.4    30.0   145
 GRAVE SPRINGS            8550    12.3    11.0   112     12.8    13.2    97
 KIRWIN                   9550    17.0    12.9   132     17.5    14.3   122
 MARQUETTE                8760     7.1      -M      *    10.1    13.8    73
 MIDDLE POWDER            7760    14.9    14.2   105     14.4    15.9    91
 OWL CREEK                8975     7.4     3.9   190      9.1     8.3   110
 POWDER RIVER PASS        9480    20.9    10.5   199     24.1    15.9   152
 SHELL CREEK              9580    24.5    16.8   146     22.1    16.9   131
 SYLVAN LAKE              8420    33.2    23.5   141     36.7    24.8   148
 SYLVAN ROAD              7120    17.9     7.8   229     27.0    20.6   131
 TIMBER CREEK             7950     6.2     4.8   129      8.2    10.6    77
 YOUNTS PEAK              8350    23.8    18.1   131     20.9    18.9   111
                                                -----                  -----
                Basin wide percent of average    143                    123


SHOSHONE RIVER

 BLACKWATER               9780    36.7    28.9   127     34.6    24.8   140
 EVENING STAR             9200    41.7    33.3   125     43.4    30.0   145
 KIRWIN                   9550    17.0    12.9   132     17.5    14.3   122
 MARQUETTE                8760     7.1      -M      *    10.1    13.8    73
 SYLVAN LAKE              8420    33.2    23.5   141     36.7    24.8   148
 SYLVAN ROAD              7120    17.9     7.8   229     27.0    20.6   131
 YOUNTS PEAK              8350    23.8    18.1   131     20.9    18.9   111
                                                -----                  -----
                Basin wide percent of average    137                    129


POWDER-TONGUE

 BEAR TRAP MEADOW         8200    11.6     2.3   504     12.5    11.0   114
 BIG GOOSE                7990    13.4    11.5   117     15.5    13.0   119
 BONE SPRINGS DIV         9350    28.2    18.3   154     22.7    18.4   123
 BURGESS JUNCTION         7880    16.2    13.1   124     16.8    15.5   108
 CLOUD PEAK RESERVOIR     9860    22.3    16.2   138     20.8    17.3   120
 DOME LAKE                8880    19.6    13.3   147     19.1    16.9   113
 GRAVE SPRINGS            8550    12.3    11.0   112     12.8    13.2    97
 HANSEN SAWMILL           8360    10.5     4.7   223     12.0    11.1   108
 LITTLE GOOSE             8870    15.8      -M      *    19.9      -M      *
 MIDDLE POWDER            7760    14.9    14.2   105     14.4    15.9    91
 POWDER RIVER PASS        9480    20.9    10.5   199     24.1    15.9   152
 SOLDIER PARK             8720    11.9      -M      *    13.0      -M      *
 SUCKER CREEK             8880    19.2    12.9   149     21.2    17.6   120
 TIE CREEK                6870     9.2     3.9   236     14.8    13.6   109
                                                -----                  -----
                Basin wide percent of average    150                    115


BELLE FOURCHE

 BLIND PARK               6890    11.4     4.0   285     21.7    14.3   152
 COLE CANYON              5910     9.3     4.5   207     16.6     9.6   173
 NORTH RAPID CREEK        6130     6.3     3.4   185     17.2    11.5   150
                                                -----                  -----
                Basin wide percent of average    227                    157


UPPER N. PLATTE RIVER

 CINNABAR PARK            9574    30.5    15.8   193     36.9    23.7   156
 COLUMBINE                9160    39.9    20.5   195     44.3    29.3   151
 DIVIDE PEAK              8880    31.8    19.0   167     36.6    24.4   150
 ELK RIVER                8700    30.5    14.5   210     34.1    23.2   147
 JOE WRIGHT              10120    48.2    25.1   192     48.2    30.3   159
 NORTH FRENCH CREEK      10130      -M    34.5      *    59.3    29.9   198
 OLD BATTLE              10000    56.7    37.0   153     47.3    40.1   118
 SAGE CREEK BASIN         7850    19.2    11.0   175     23.9    14.2   168
 SOUTH BRUSH CREEK        8440    25.0    10.8   231     30.5    20.3   150
 TOWER                   10500    72.5    52.3   139     47.7    45.3   105
 WEBBER SPRINGS           9250    39.5    24.8   159     46.1    31.3   147
 WILLOW CREEK PASS        9540    27.1    14.1   192     24.9    15.8   158
                                                -----                  -----
                Basin wide percent of average    172                    146


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    42.0    28.1   149     38.0    27.1   140
 CASPER MTN.              7900    13.6    16.9    80     18.5    19.7    94
 DEADMAN HILL            10220    31.3    19.7   159     30.6    21.1   145
 DEER PARK                9700    22.3    18.5   121     26.2    27.1    97
 LAPRELE CREEK            8375    15.1     6.9   219     18.1    16.6   109
 RENO HILL                8400    18.9    14.5   130     22.3    20.4   109
 ROACH                    9700    28.1    18.3   154     31.2    22.6   138
 SAND LAKE               10050    49.5    37.0   134       -M    29.5      *
 SOUTH PASS               9040    19.4    17.8   109     17.1    22.8    75
 WINDY PEAK               7900     9.7     4.7   206     16.6    13.6   122
                                                -----                  -----
                Basin wide percent of average    137                    114


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      -M     4.3      *    21.6    18.7   116
 DIVIDE PEAK              8880    31.8    19.0   167     36.6    24.4   150
 OLD BATTLE              10000    56.7    37.0   153     47.3    40.1   118
 SANDSTONE RS             8150    23.1     9.1   254     33.6    22.0   153
 WHISKEY PARK             8950      -M    30.4      *    53.5    34.0   157
                                                -----                  -----
                Basin wide percent of average    171                    138


UPPER GREEN RIVER

 BIG SANDY OPENING        9080    19.6    13.2   148     19.7    16.0   123
 BLIND BULL SUM           8650    43.7    27.7   158     28.7    25.3   113
 EAST RIM DIVIDE          7930    17.1    13.0   132     16.7    14.0   119
 ELKHART PARK G.S.        9400    17.8    12.6   141     17.5    16.1   109
 GROS VENTRE SUMMIT       8750    18.6    13.1   142     19.1    15.3   125
 GUNSIGHT PASS            9820    23.8      -M      *    21.9      -M      *
 KENDALL R.S.             7740    14.5     9.6   151     19.6    16.6   118
 LOOMIS PARK              8240    25.3    14.0   181     26.6    20.0   133
 NEW FORK LAKE            8340    15.2     8.2   185     14.0    13.5   104
 POCKET CREEK             9360    17.1      -M      *    18.6      -M      *
 SNIDER BASIN             8060    24.4    12.4   197     23.1    18.6   124
 SPRING CREEK DIVIDE      9000    44.4    28.4   156     40.4    30.3   133
 TRIPLE PEAK              8500    42.2    23.4   180     42.9    28.8   149
                                                -----                  -----
                Basin wide percent of average    161                    125


LOWER GREEN RIVER

 HAMS FORK                7840    17.8     5.6   318     19.0    14.8   128
 HEWINTA                  9519    17.8     9.0   198     23.2    17.9   130
 HICKERSON PARK           9145     4.9     5.4    91     13.0    10.3   126
 HOLE-IN-ROCK             9150     9.5     4.5   211     14.8     9.8   151
 INDIAN CREEK             9425    40.4    28.1   144     33.6    29.6   114
 KELLEY R.S.              8180    26.4    13.8   191     29.7    23.7   125
 STEEL CREEK PARK        10200    25.1    18.7   134     27.1    20.3   133
                                                -----                  -----
                Basin wide percent of average    167                    127


UPPER BEAR RIVER

 BUG LAKE                 7950    36.8    17.6   209     36.3    22.5   161
 HAYDEN FORK              9212      -M    12.6      *    38.0    25.3   150
 KELLEY R.S.              8180    26.4    13.8   191     29.7    23.7   125
 LILY LAKE                9156    27.5    10.8   255     29.0    21.2   137
 MONTE CRISTO             8960    49.1    28.0   175     46.7    30.4   154
 SALT RIVER SUMMIT        7760    21.3    10.3   207     26.8    21.7   124
 TRIAL LAKE               9992    47.2    26.4   179     42.5    29.6   144
                                                -----                  -----
                Basin wide percent of average    195                    143

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


 -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.