Wyoming Snow Precipitation Update
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: MAY 9 , 2007
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BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
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WYOMING
SNAKE RIVER  
 BASE CAMP                7030      .0     9.0     0     21.4    25.1    85
 COTTONWOOD CREEK         7600     8.1    16.4    49     25.5    32.9    78
 GRANITE CREEK            6770      .0     9.9     0     17.7    23.0    77
 GRASSY LAKE              7265    13.3    29.5    45     36.8    42.0    88
 GROS VENTRE SUMMIT       8750     5.6    11.4    49     14.0    15.9    88
 LEWIS LAKE DIVIDE        7850    13.8    31.4    44     32.7    42.6    77
 PHILLIPS BENCH           8200    10.4    26.4    39     25.0    34.0    74
 SALT RIVER SUMMIT        7600      .0     7.3     0     16.2    22.2    73
 SNAKE RIVER STATION      6920      .0     8.5     0     23.6    26.2    90
 SPRING CREEK DIVIDE      9000    18.5    26.4    70     22.9    30.9    74
 THUMB DIVIDE             7980      .1    11.9     1     17.5    22.7    77
 TOGWOTEE PASS            9580    17.1    27.6    62     23.4    30.0    78
 TWO OCEAN PLATEAU        9240    24.0    31.2    77     25.7    33.2    77
 WILLOW CREEK             8450    13.5    27.6    49     34.5    39.0    88
                                                -----                  -----
                Basin wide percent of average     45                     80
UPPER YELLOWSTONE-MADISON
 BEARTOOTH LAKE           9275    20.2    25.7    79     22.1    24.4    91
 BLACK BEAR               8170    25.2    38.0    66     37.7    47.0    80
 CANYON                   8090     2.3     8.9    26     17.7    18.4    96
 FISHER CREEK             9100    28.3    37.1    76     33.8    43.1    78
 MADISON PLATEAU          7750    11.2    21.5    52     24.5    31.4    78
 NORTHEAST ENTRANCE       7350      .0     4.9     0     15.0    15.5    97
 PARKER PEAK              9400    15.9    24.2    66     21.3    20.5   104
 SYLVAN LAKE              8420     8.1    21.8    37     24.8    25.8    96
 THUMB DIVIDE             7980      .1    11.9     1     17.5    22.7    77
 TWO OCEAN PLATEAU        9240    24.0    31.2    77     25.7    33.2    77
 WHISKEY CREEK            6800     2.8    12.1    23     19.5    25.0    78
 WHITE MILL               8700    18.1    25.4    71     22.8    32.2    71
 WOLVERINE                7650      .0     4.9     0     13.0    16.0    81
                                                -----                  -----
                Basin wide percent of average     58                     83
WIND RIVER
 BURROUGHS CREEK          8750     8.6    11.8    73     15.1    20.2    75
 COLD SPRINGS             9630     1.6     3.9    41     12.8    14.7    87
 DEER PARK                9700    10.8    17.8    61     21.0    28.0    75
 HOBBS PARK              10100    15.5    17.3    90     19.2    18.0   107
 LITTLE WARM              9370     3.6     9.2    39     14.1    17.6    80
 SOUTH PASS               9040     8.0    15.8    51     18.0    23.6    76
 ST. LAWRENCE ALT         8620     2.2     4.7    47     12.9    12.9   100
 TOGWOTEE PASS            9580    17.1    27.6    62     23.4    30.0    78
 TOWNSEND CREEK           8700     3.0     7.2    42     15.7    16.4    96
                                                -----                  -----
                Basin wide percent of average     61                     84
BIGHORN BASIN
 BALD MTN.                9380    23.3    23.3   100     20.0    22.3    90
 BEAR TRAP MEADOW         8200      .8     1.5    53     13.1    11.8   111
 BLACKWATER               9780    21.3    28.8    74     23.4    25.8    91
 BONE SPRINGS DIV         9350    20.3    17.1   119     23.2    19.3   120
 EVENING STAR             9200    18.6    32.8    57     30.6    31.1    98
 GRAVE SPRINGS            8550     5.6     9.3    60     11.9    13.9    86
 KIRWIN                   9550    11.4    11.9    96     17.0    15.1   113
 MARQUETTE                8760     2.9     9.9    29     15.7    14.8   106
 MIDDLE POWDER            7760    11.5    12.5    92     12.7    16.7    76
 OWL CREEK                8975      .0     3.0     0      9.2     8.9   103
 POWDER RIVER PASS        9480     6.0     9.2    65     15.7    16.8    93
 SHELL CREEK              9580    17.1    16.5   104     17.3    17.8    97
 SYLVAN LAKE              8420     8.1    21.8    37     24.8    25.8    96
 SYLVAN ROAD              7120      .0     5.0     0     17.9    21.2    84
 TIMBER CREEK             7950      .0     3.3     0     12.0    11.5   104
 YOUNTS PEAK              8350     7.6    16.6    46     16.1    19.7    82
                                                -----                  -----
                Basin wide percent of average     69                     96
SHOSHONE RIVER
 BLACKWATER               9780    21.3    28.8    74     23.4    25.8    91
 EVENING STAR             9200    18.6    32.8    57     30.6    31.1    98
 KIRWIN                   9550    11.4    11.9    96     17.0    15.1   113
 MARQUETTE                8760     2.9     9.9    29     15.7    14.8   106
 SYLVAN LAKE              8420     8.1    21.8    37     24.8    25.8    96
 SYLVAN ROAD              7120      .0     5.0     0     17.9    21.2    84
 YOUNTS PEAK              8350     7.6    16.6    46     16.1    19.7    82
                                                -----                  -----
                Basin wide percent of average     55                     95
POWDER-TONGUE
 BEAR TRAP MEADOW         8200      .8     1.5    53     13.1    11.8   111
 BIG GOOSE                7990    10.5    10.2   103     19.0    13.8   138
 BONE SPRINGS DIV         9350    20.3    17.1   119     23.2    19.3   120
 BURGESS JUNCTION         7880    13.8    11.5   120     19.2    16.2   119
 CLOUD PEAK RESERVOIR     9860    16.3    15.4   106     20.0    18.3   109
 DOME LAKE                8880    12.9    11.7   110     21.9    17.8   123
 GRAVE SPRINGS            8550     5.6     9.3    60     11.9    13.9    86
 HANSEN SAWMILL           8360      .8     3.4    24     13.2    11.8   112
 MIDDLE POWDER            7760    11.5    12.5    92     12.7    16.7    76
 POWDER RIVER PASS        9480     6.0     9.2    65     15.7    16.8    93
 SUCKER CREEK             8880    14.6    11.4   128     22.4    18.5   121
 TIE CREEK                6870     2.1     2.4    88     16.8    14.5   116
                                                -----                  -----
                Basin wide percent of average    100                    110
BELLE FOURCHE
 BLIND PARK               6890      .0     1.8     0     12.8    15.2    84
 COLE CANYON              5910      .0     4.0     0     14.0      -M      *
 NORTH RAPID CREEK        6130      .0     2.0     0     12.0    12.1    99
                                                -----                  -----
                Basin wide percent of average      0                     91
UPPER N. PLATTE RIVER
 COLUMBINE                9160      .0    16.4     0     24.3    30.0    81
 DIVIDE PEAK              8860     9.1    15.6    58     23.1    25.1    92
 ELK RIVER                8700      .3    10.8     3     21.1    23.8    89
 JOE WRIGHT              10120    22.8    24.4    93     27.5    31.3    88
 NORTH FRENCH CREEK      10130    24.7    33.8    73     28.8    30.9    93
 OLD BATTLE               9920    26.3    36.1    73     32.7    41.0    80
 SAGE CREEK BASIN         7850      .0     9.0     0     15.0    14.6   103
 SOUTH BRUSH CREEK        8440      .0     8.5     0     17.2    21.0    82
 TOWER                   10500    28.5    51.8    55     37.3    46.4    80
 WEBBER SPRINGS           9250    11.0    21.1    52     26.9    32.0    84
 WILLOW CREEK PASS        9540    15.5    12.5   124     16.3    16.5    99
                                                -----                  -----
                Basin wide percent of average     58                     86
LOWER N. PLATTE - SWEETWATER - LARAMIE
 BROOKLYN LAKE           10220    19.1    25.3    75     24.6    28.1    88
 CASPER MTN.              7850     7.7    14.0    55     17.5    20.7    85
 DEADMAN HILL            10220    16.1    18.7    86     22.3    22.0   101
 DEER PARK                9700    10.8    17.8    61     21.0    28.0    75
 LAPRELE CREEK            8375     1.1     5.1    22     16.1    17.4    93
 RENO HILL                8500    10.8    11.8    92     22.2    21.4   104
 ROACH                    9700    17.4    15.6   112     24.1    23.4   103
 SAND LAKE               10050    28.3    36.1    78     30.7    30.6   100
 SOUTH PASS               9040     8.0    15.8    51     18.0    23.6    76
 WINDY PEAK               7900     1.5     3.1    48     15.7    14.4   109
                                                -----                  -----
                Basin wide percent of average     74                     92
LITTLE SNAKE RIVER
 BATTLE MOUNTAIN          7440      .0     2.3     0     15.7    19.2    82
 DIVIDE PEAK              8860     9.1    15.6    58     23.1    25.1    92
 OLD BATTLE               9920    26.3    36.1    73     32.7    41.0    80
 SANDSTONE RS             8150      .6     6.2    10     18.1    22.6    80
 WHISKEY PARK             8950    15.5    28.2    55     27.4    34.8    79
                                                -----                  -----
                Basin wide percent of average     58                     82
UPPER GREEN RIVER
 BIG SANDY OPENING        9080     2.6    10.9    24     13.0    16.6    78
 BLIND BULL SUM           8900    20.7    26.2    79     19.4    25.9    75
 EAST RIM DIVIDE          7930      .0    10.9     0     10.7    14.5    74
 ELKHART PARK G.S.        9400     6.0    10.9    55     13.9    16.8    83
 GROS VENTRE SUMMIT       8750     5.6    11.4    49     14.0    15.9    88
 KENDALL R.S.             7740      .0     6.4     0     14.3    17.1    84
 LOOMIS PARK              8240      .1    11.7     1     15.9    20.6    77
 NEW FORK LAKE            8340      .0     5.8     0     11.2    14.0    80
 SNIDER BASIN             8060     1.6     9.8    16     13.8    19.0    73
 SPRING CREEK DIVIDE      9000    18.5    26.4    70     22.9    30.9    74
 TRIPLE PEAK              8500    10.8    19.9    54     26.6    29.5    90
                                                -----                  -----
                Basin wide percent of average     44                     80
LOWER GREEN RIVER
 HAMS FORK                7840      .0     3.2     0     12.0    15.3    78
 HEWINTA                  9500      .0     6.6     0     15.7    18.4    85
 HICKERSON PARK           9100      .9     3.6    25     14.1    10.8   131
 HOLE-IN-ROCK             9150      .0     3.0     0     12.7    10.3   123
 INDIAN CREEK             9425    13.5    25.7    53     20.7    30.3    68
 KELLEY R.S.              8180     4.0    11.2    36     18.1    24.3    74
 STEEL CREEK PARK        10100    13.7    18.3    75     17.0    21.0    81
                                                -----                  -----
                Basin wide percent of average     45                     85
UPPER BEAR RIVER
 BUG LAKE                 7950     5.8    13.9    42     17.8    23.1    77
 HAYDEN FORK              9100      .0     9.7     0     22.5    26.0    87
 KELLEY R.S.              8180     4.0    11.2    36     18.1    24.3    74
 LILY LAKE                9050      .8     8.4    10     17.9    21.9    82
 MONTE CRISTO             8960    11.0    25.1    44     25.0    31.3    80
 SALT RIVER SUMMIT        7600      .0     7.3     0     16.2    22.2    73
 TRIAL LAKE               9960     9.7    24.6    39     23.1    30.4    76
                                                -----                  -----
                Basin wide percent of average     31                     78
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 -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.
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 -M   = Missing data                                                         
  *   = Data may not provide a valid measure of conditions.                  
 Units = inches for the Current and Normal Snow Water Equivalent and         
 Total Precipitation values                                                  
 If the Basin Index (%) 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 Median represents the snow water       
 equivalent found at selected SNOTEL sites in or near the basin compared to  
 the Median 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.                       
 Medians and averages are calculated for the period 1981-2010.               
 Provisional data, subject to revision.                                      
 * Site -- Either: (a) the current value is missing; (b) the median or       
 average for the day is not available or is zero; or (c) for snow water      
 equivalent, the median for the day is less than 10% of the maximum          
 median value for  the year.                                                 
 * Basin - More than half of the sites within the basin are flagged with *,  
 preventing the calculation of a meaningful basin index.                     
 The basin index is calculated as the sum of the valid current values        
 divided by the sum of the corresponding medians (for snow water equivalent) 
 or averages (for precipitation) and the resulting fraction multiplied by 100.