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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 THURSDAY: MAY 21 , 2009
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030      .0     4.3     0     24.6    26.1    94
 COTTONWOOD CREEK         7670    14.4    11.5   125     38.4    34.5   111
 GRAND TARGHEE            9260    42.7      -M      *    42.5      -M      *
 GRANITE CREEK            6770      .6     5.9    10     26.1    24.0   109
 GRASSY LAKE              7265    17.7    23.3    76     42.8    43.5    98
 GROS VENTRE SUMMIT       8750     5.3     8.2    65     19.2    16.7   115
 GUNSIGHT PASS            9820    14.5      -M      *    20.8      -M      *
 LEWIS LAKE DIVIDE        7850    27.0    26.2   103     42.1    44.0    96
 PHILLIPS BENCH           8200    21.1    21.4    99     36.1    35.4   102
 SALT RIVER SUMMIT        7760      .3     2.5    12     20.3    23.2    88
 SNAKE RIVER STATION      6920      .0     3.1     0     28.8    27.3   105
 SPRING CREEK DIVIDE      9000    24.7    22.3   111     32.8    32.1   102
 THUMB DIVIDE             7980     8.2     7.5   109     27.5    23.8   116
 TOGWOTEE PASS            9580    29.6    26.3   113     36.5    31.4   116
 TWO OCEAN PLATEAU        9240    43.5    29.6   147     37.8    34.8   109
 WILLOW CREEK             8380    23.4    22.5   104     48.4    40.9   118
                                                -----                  -----
                Basin wide percent of average    101                    105


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9360    25.0    24.4   102     27.5    25.8   107
 BLACK BEAR               8170    37.5    34.5   109     45.3    48.7    93
 CANYON                   7870     7.5     5.2   144     20.3    19.4   105
 FISHER CREEK             9100    40.7    35.0   116     45.1    44.9   100
 MADISON PLATEAU          7750    19.1    16.9   113     32.1    32.8    98
 NORTHEAST ENTRANCE       7350      .0     1.7     0     18.0    16.5   109
 PARKER PEAK              9400    26.1    23.1   113     24.5    21.8   112
 SYLVAN LAKE              8420      -M    18.2      *    30.5    27.3   112
 THUMB DIVIDE             7980     8.2     7.5   109     27.5    23.8   116
 TWO OCEAN PLATEAU        9240    43.5    29.6   147     37.8    34.8   109
 WHISKEY CREEK            6800    11.1     7.2   154     26.5    26.1   102
 WHITE MILL               8700    26.9    23.4   115     31.6    33.7    94
 WOLVERINE                7650      .0     1.7     0     17.0    17.2    99
                                                -----                  -----
                Basin wide percent of average    117                    103


WIND RIVER

 BURROUGHS CREEK          8750    12.8     8.8   145     21.8    21.4   102
 COLD SPRINGS             9630      .0     2.3     0     15.7    16.0    98
 DEER PARK                9700     9.3    16.4    57     23.1    29.5    78
 HOBBS PARK              10100    13.2    15.5    85     21.2    19.6   108
 LITTLE WARM              9370     4.5     5.9    76     19.8    18.9   105
 SOUTH PASS               9040     5.7    11.6    49     20.0    25.0    80
 ST. LAWRENCE ALT         8620      .0     2.2     0     14.6    14.1   104
 TOGWOTEE PASS            9580    29.6    26.3   113     36.5    31.4   116
 TOWNSEND CREEK           8700      .0     4.3     0     17.4    17.7    98
                                                -----                  -----
                Basin wide percent of average     80                     98


BIGHORN BASIN

 BALD MTN.                9380    19.2    22.0    87     20.0    24.0    83
 BEAR TRAP MEADOW         8200      .0      .1     0     12.5    13.0    96
 BLACKWATER               9780    30.4    28.7   106     31.0    27.3   114
 BONE SPRINGS DIV         9350    14.3    14.6    98     19.0    20.9    91
 EVENING STAR             9200    28.8    31.3    92     40.0    32.7   122
 GRAVE SPRINGS            8550     1.1     5.2    21     12.5    15.1    83
 KIRWIN                   9550     8.9    10.0    89     19.9    16.3   122
 MARQUETTE                8760     1.0     7.8    13     13.6    16.5    82
 MIDDLE POWDER            7760     4.4     8.5    52     13.3    18.0    74
 OWL CREEK                8975      .0     1.6     0     10.3    10.0   103
 POWDER RIVER PASS        9480     7.3     6.4   114     19.5    18.2   107
 SHELL CREEK              9580    16.5    15.1   109     20.3    19.2   106
 SYLVAN LAKE              8420      -M    18.2      *    30.5    27.3   112
 SYLVAN ROAD              7120      .2     1.4    14     25.4    22.3   114
 TIMBER CREEK             7950      .1     1.7     6     12.0    13.0    92
 YOUNTS PEAK              8350    15.5    13.5   115     20.9    20.8   100
                                                -----                  -----
                Basin wide percent of average     88                    102


SHOSHONE RIVER

 BLACKWATER               9780    30.4    28.7   106     31.0    27.3   114
 EVENING STAR             9200    28.8    31.3    92     40.0    32.7   122
 KIRWIN                   9550     8.9    10.0    89     19.9    16.3   122
 MARQUETTE                8760     1.0     7.8    13     13.6    16.5    82
 SYLVAN LAKE              8420      -M    18.2      *    30.5    27.3   112
 SYLVAN ROAD              7120      .2     1.4    14     25.4    22.3   114
 YOUNTS PEAK              8350    15.5    13.5   115     20.9    20.8   100
                                                -----                  -----
                Basin wide percent of average     91                    111


POWDER-TONGUE

 BEAR TRAP MEADOW         8200      .0      .1     0     12.5    13.0    96
 BIG GOOSE                7990     4.3     7.9    54     16.6    15.3   108
 BONE SPRINGS DIV         9350    14.3    14.6    98     19.0    20.9    91
 BURGESS JUNCTION         7880     7.6     8.1    94     16.0    17.5    91
 CLOUD PEAK RESERVOIR     9860    15.0    13.4   112     21.9    20.1   109
 DOME LAKE                8880     4.4     8.5    52     19.8    19.3   103
 GRAVE SPRINGS            8550     1.1     5.2    21     12.5    15.1    83
 HANSEN SAWMILL           8360      .0     1.2     0     13.3    12.9   103
 MIDDLE POWDER            7760     4.4     8.5    52     13.3    18.0    74
 POWDER RIVER PASS        9480     7.3     6.4   114     19.5    18.2   107
 SUCKER CREEK             8880    10.2     8.5   120     21.5    20.2   106
 TIE CREEK                6870      .0      .6     0     17.6    16.0   110
                                                -----                  -----
                Basin wide percent of average     83                     99


BELLE FOURCHE

 BLIND PARK               6890      .0      .0   100     18.1    16.5   110
 COLE CANYON              5910      .0      .3     0     15.6    11.7   133
 NORTH RAPID CREEK        6130      .0      .2     0     17.7    13.1   135
                                                -----                  -----
                Basin wide percent of average      0                    124


UPPER N. PLATTE RIVER

 COLUMBINE                9160      .0     9.4     0     33.3    31.2   107
 DIVIDE PEAK              8880     7.7     9.9    78     33.4    26.4   127
 ELK RIVER                8700      .1     5.1     2     25.6    25.0   102
 JOE WRIGHT              10120      -M    22.5      *      -M    33.2      *
 NORTH FRENCH CREEK      10130    30.1    31.4    96     39.7    32.8   121
 OLD BATTLE              10000    34.6    33.3   104     47.5    42.8   111
 SAGE CREEK BASIN         7850      .0     5.7     0     19.5    15.3   127
 SOUTH BRUSH CREEK        8440      .0     4.8     0     22.7    22.5   101
 TOWER                   10500    41.4    50.0    83     51.0    48.5   105
 WEBBER SPRINGS           9250    10.1    14.6    69     35.9    33.5   107
 WILLOW CREEK PASS        9540     3.5     8.9    39     16.4    17.6    93
                                                -----                  -----
                Basin wide percent of average     74                    110


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    14.5    20.0    72     28.4    29.8    95
 CASPER MTN.              7900     2.3     9.2    25     17.4    22.5    77
 DEADMAN HILL            10220    14.9    16.5    90     23.7    23.4   101
 DEER PARK                9700     9.3    16.4    57     23.1    29.5    78
 LAPRELE CREEK            8375      .0     2.5     0     16.9    18.9    89
 RENO HILL                8400     5.1     7.6    67     21.5    23.3    92
 ROACH                    9700     5.4    11.1    49     24.3    25.0    97
 SAND LAKE               10050    30.6    33.7    91     37.0    32.6   113
 SOUTH PASS               9040     5.7    11.6    49     20.0    25.0    80
 WINDY PEAK               7900      .6     1.0    60     15.8    15.8   100
                                                -----                  -----
                Basin wide percent of average     68                     93


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .0      .0   100     22.9    20.2   113
 DIVIDE PEAK              8880     7.7     9.9    78     33.4    26.4   127
 OLD BATTLE              10000    34.6    33.3   104     47.5    42.8   111
 SANDSTONE RS             8150      .1     2.2     5     25.3    23.8   106
 WHISKEY PARK             8950      -M    23.5      *    40.8    36.6   111
                                                -----                  -----
                Basin wide percent of average     93                    113


UPPER GREEN RIVER

 BIG SANDY OPENING        9080     1.5     7.0    21     16.8    17.6    95
 BLIND BULL SUM           8650    31.0    23.3   133     25.5    27.1    94
 EAST RIM DIVIDE          7930      .0     7.1     0     14.7    15.2    97
 ELKHART PARK G.S.        9400     7.1     7.8    91     18.9    17.9   106
 GROS VENTRE SUMMIT       8750     5.3     8.2    65     19.2    16.7   115
 GUNSIGHT PASS            9820    14.5      -M      *    20.8      -M      *
 KENDALL R.S.             7740      .0     1.1     0     17.4    17.9    97
 LOOMIS PARK              8240      .8     7.7    10     22.4    21.6   104
 NEW FORK LAKE            8340      .0     1.9     0     15.1    14.9   101
 SNIDER BASIN             8060      -M     5.4      *    17.9    19.7    91
 SPRING CREEK DIVIDE      9000    24.7    22.3   111     32.8    32.1   102
 TRIPLE PEAK              8500    12.5    13.8    91     33.7    30.8   109
                                                -----                  -----
                Basin wide percent of average     83                    101


LOWER GREEN RIVER

 HAMS FORK                7840      .1      .0           16.0    16.2    99
 HEWINTA                  9519      .0     2.9     0     17.3    19.4    89
 HICKERSON PARK           9145      .0     1.1     0     13.4    11.7   115
 HOLE-IN-ROCK             9150      .0      .9     0     12.8    11.3   113
 INDIAN CREEK             9425      -M    21.4      *    27.3    31.4    87
 KELLEY R.S.              8180     2.9     7.0    41     22.0    25.3    87
 STEEL CREEK PARK        10200     9.5    16.8    57     21.0    22.1    95
                                                -----                  -----
                Basin wide percent of average     43                     94


UPPER BEAR RIVER

 BUG LAKE                 7950     2.1     8.1    26     22.0    24.2    91
 HAYDEN FORK              9212      .1     5.2     2     27.3    27.3   100
 KELLEY R.S.              8180     2.9     7.0    41     22.0    25.3    87
 LILY LAKE                9156      .0     4.6     0     21.6    23.0    94
 MONTE CRISTO             8960    12.4    20.0    62     31.9    32.8    97
 SALT RIVER SUMMIT        7760      .3     2.5    12     20.3    23.2    88
 TRIAL LAKE               9992    10.9    21.0    52     29.9    31.9    94
                                                -----                  -----
                Basin wide percent of average     42                     93

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


 -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 1961-90.

Provisional data, subject to revision.