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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 1 , 2003 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030     9.4    12.3    76     23.8    24.4    98 
 COTTONWOOD CREEK         7600    15.1    19.8    76     26.4    31.9    83 
 GRANITE CREEK            6770     5.7    12.8    45     18.0    22.4    80 
 GRASSY LAKE              7265    29.3    33.4    88     36.9    40.9    90 
 GROS VENTRE SUMMIT       8775    10.8    13.3    81     12.8    15.3    84 
 LEWIS LAKE DIVIDE        7860    31.4    34.6    91     33.1    41.6    80 
 PHILLIPS BENCH           8200    22.2    29.4    76     26.0    33.1    79 
 SALT RIVER SUMMIT        7600     4.2    10.6    40     15.1    21.6    70 
 SNAKE RIVER STATION      6920     5.4    12.2    44     23.5    25.5    92 
 SPRING CREEK DIVIDE      9000    24.6    28.6    86     24.8    30.2    82 
 THUMB DIVIDE             7980    11.3    14.9    76     19.3    22.0    88 
 TOGWOTEE PASS            9580    24.4    27.9    87     25.9    29.0    89 
 TWO OCEAN PLATEAU        9360    35.8    31.8   113     29.2    32.1    91 
 WILLOW CREEK             8450    23.3    30.6    76     37.0    37.7    98 
                                                -----                  -----
                Basin wide percent of average     81                     86 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275    29.2    25.9   113     25.6    23.5   109 
 BLACK BEAR               8170    37.7    39.9    94     35.9    45.8    78 
 CANYON                   8090    12.3    11.3   109     17.3    17.7    98 
 FISHER CREEK             9100    39.1    37.8   103     37.7    41.9    90 
 MADISON PLATEAU          7750    20.7    24.2    86     24.7    30.4    81 
 NORTHEAST ENTRANCE       7350     4.4     7.1    62     15.2    14.8   103 
 PARKER PEAK              9400    27.9    24.5   114     23.0    19.5   118 
 SYLVAN LAKE              8420      -M    23.8      *      -M    24.7      *
 THUMB DIVIDE             7980    11.3    14.9    76     19.3    22.0    88 
 TWO OCEAN PLATEAU        9360    35.8    31.8   113     29.2    32.1    91 
 WHISKEY CREEK            6800    11.1    15.2    73     19.3    24.2    80 
 WHITE MILL               8700    29.1    26.4   110     26.1    31.2    84 
 WOLVERINE                7650     4.7     7.2    65     13.8    15.2    91 
                                                -----                  -----
                Basin wide percent of average     99                     90 


WIND RIVER

 BURROUGHS CREEK          8750    16.9    13.6   124     20.7    19.3   107 
 COLD SPRINGS             9630     1.5     4.8    31     11.5    13.9    83 
 DEER PARK                9700    14.0    18.6    75     20.0    27.0    74 
 HOBBS PARK              10100    13.4    18.0    74     15.2    16.9    90 
 LITTLE WARM              9370     6.4    11.1    58     12.9    16.8    77 
 SOUTH PASS               9040    10.4    18.0    58     16.0    22.7    70 
 ST. LAWRENCE ALT         8620     1.2     6.1    20      9.9    12.1    82 
 TOGWOTEE PASS            9580    24.4    27.9    87     25.9    29.0    89 
 TOWNSEND CREEK           8700     5.3     9.1    58     13.6    15.5    88 
                                                -----                  -----
                Basin wide percent of average     74                     84 


BIGHORN BASIN

 BALD MTN.                9380    18.9    23.6    80     18.9    21.3    89 
 BEAR TRAP MEADOW         8200      -M     2.5      *      -M    10.9      *
 BLACKWATER               9780    28.7    28.8   100     25.0    24.7   101 
 BONE SPRINGS DIV         9350    17.6    18.3    96     19.0    18.3   104 
 EVENING STAR             9200    31.7    33.3    95     35.4    29.9   118 
 GRAVE SPRINGS            8550      -M    11.1      *     9.8    13.1    75 
 KIRWIN                   9550    13.9    13.0   107     15.1    14.2   106 
 MARQUETTE                8760    13.7    11.3   121     16.6    13.7   121 
 MIDDLE POWDER            7760     7.6    14.3    53      9.6    15.8    61 
 OWL CREEK                8975      .7     4.0    18      7.5     8.2    91 
 POWDER RIVER PASS        9480     8.7    10.7    81     15.0    15.8    95 
 SHELL CREEK              9580    15.9    16.8    95     16.3    16.8    97 
 SYLVAN LAKE              8420      -M    23.8      *      -M    24.7      *
 SYLVAN ROAD              7120     9.1     8.1   112     19.6    20.5    96 
 TIMBER CREEK             7950     4.0     4.8    83      9.7    10.5    92 
 YOUNTS PEAK              8350    16.4    18.1    91     17.8    18.8    95 
                                                -----                  -----
                Basin wide percent of average     91                     97 


SHOSHONE RIVER

 BLACKWATER               9780    28.7    28.8   100     25.0    24.7   101 
 EVENING STAR             9200    31.7    33.3    95     35.4    29.9   118 
 KIRWIN                   9550    13.9    13.0   107     15.1    14.2   106 
 MARQUETTE                8760    13.7    11.3   121     16.6    13.7   121 
 SYLVAN LAKE              8420      -M    23.8      *      -M    24.7      *
 SYLVAN ROAD              7120     9.1     8.1   112     19.6    20.5    96 
 YOUNTS PEAK              8350    16.4    18.1    91     17.8    18.8    95 
                                                -----                  -----
                Basin wide percent of average    101                    106 


POWDER-TONGUE

 BEAR TRAP MEADOW         8200      -M     2.5      *      -M    10.9      *
 BIG GOOSE                7990    10.8    11.6    93     16.3    12.9   126 
 BONE SPRINGS DIV         9350    17.6    18.3    96     19.0    18.3   104 
 BURGESS JUNCTION         7880    13.1    13.3    98     16.6    15.4   108 
 CLOUD PEAK RESERVOIR     9860    16.1    16.2    99     17.2    17.1   101 
 DOME LAKE                8880    11.6    13.5    86     18.2    16.8   108 
 GRAVE SPRINGS            8550      -M    11.1      *     9.8    13.1    75 
 HANSEN SAWMILL           8360     2.1     4.9    43     12.5    11.0   114 
 MIDDLE POWDER            7760     7.6    14.3    53      9.6    15.8    61 
 POWDER RIVER PASS        9480     8.7    10.7    81     15.0    15.8    95 
 SUCKER CREEK             8880    14.1    13.1   108     19.4    17.4   111 
 TIE CREEK                6870     3.3     3.9    85     16.6    13.5   123 
                                                -----                  -----
                Basin wide percent of average     88                    102 


BELLE FOURCHE

 BLIND PARK               6890      .5     4.0    12     12.7    14.2    89 
 COLE CANYON              5910     1.6      -M      *     9.6      -M      *
 NORTH RAPID CREEK        6130      .7     3.8    18     11.1    11.4    97 
                                                -----                  -----
                Basin wide percent of average     15                     93 


UPPER N. PLATTE RIVER

 COLUMBINE                9400    18.3    20.9    88     28.6    29.2    98 
 DIVIDE PEAK              8800    19.4    19.3   101     25.2    24.3   104 
 ELK RIVER                8700    12.9    15.0    86     23.2    23.0   101 
 JOE WRIGHT              10120    30.1    25.1   120     35.2    30.1   117 
 NORTH FRENCH CREEK      10100    35.4    34.5   103     35.0    29.7   118 
 OLD BATTLE              10000    34.5    36.9    93     38.4    39.9    96 
 SAGE CREEK BASIN         7850      .1    11.2     1     14.7    14.1   104 
 SOUTH BRUSH CREEK        8400    11.2    11.1   101     22.0    20.1   109 
 TOWER                   10500    50.1    52.2    96     50.0    45.1   111 
 WEBBER SPRINGS           9200    17.8    25.1    71     28.8    31.1    93 
 WILLOW CREEK PASS        9540    21.1    14.2   149     19.2    15.7   122 
                                                -----                  -----
                Basin wide percent of average     95                    106 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    18.9    28.2    67     24.6    27.0    91 
 CASPER MTN.              7900    11.4    17.1    67     14.5    19.5    74 
 DEADMAN HILL            10220    19.4    19.7    98     23.3    21.0   111 
 DEER PARK                9700    14.0    18.6    75     20.0    27.0    74 
 LAPRELE CREEK            8320     6.5     7.1    92     15.3    16.5    93 
 RENO HILL                8400    14.0    14.7    95     18.6    20.2    92 
 ROACH                    9700    18.3    18.5    99     23.3    22.4   104 
 SAND LAKE               10080    31.3    37.0    85     27.5    29.3    94 
 SOUTH PASS               9040    10.4    18.0    58     16.0    22.7    70 
 WINDY PEAK               7840     8.5     4.9   173     15.7    13.5   116 
                                                -----                  -----
                Basin wide percent of average     83                     91 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .1     4.6     2     18.6    18.6   100 
 DIVIDE PEAK              8800    19.4    19.3   101     25.2    24.3   104 
 OLD BATTLE              10000    34.5    36.9    93     38.4    39.9    96 
 SANDSTONE RS             8150     6.4     9.5    67     22.3    21.9   102 
 WHISKEY PARK             8950    28.9    30.5    95     31.9    33.8    94 
                                                -----                  -----
                Basin wide percent of average     89                     98 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100     9.2    13.5    68     12.6    15.9    79 
 BLIND BULL SUM           8650    22.5    27.9    81     18.4    25.2    73 
 EAST RIM DIVIDE          7930     7.7    13.1    59     11.2    13.9    81 
 ELKHART PARK G.S.        9400    10.7    12.8    84     13.6    16.0    85 
 GROS VENTRE SUMMIT       8775    10.8    13.3    81     12.8    15.3    84 
 KENDALL R.S.             7740     4.0    10.0    40     14.1    16.6    85 
 LOOMIS PARK              8240     9.5    14.3    66     17.5    19.9    88 
 NEW FORK LAKE            8340     5.4     8.4    64       -M    13.4      *
 SNIDER BASIN             8250     6.9    12.6    55     14.0    18.5    76 
 SPRING CREEK DIVIDE      9000    24.6    28.6    86     24.8    30.2    82 
 TRIPLE PEAK              8500    16.4    23.7    69     28.0    28.6    98 
                                                -----                  -----
                Basin wide percent of average     72                     83 


LOWER GREEN RIVER

 HAMS FORK                7840      .8     6.0    13     11.7    14.7    80 
 HEWINTA                  9500     3.9     9.3    42     13.8    17.8    78 
 HICKERSON PARK           9150      .0     5.7     0      9.6    10.2    94 
 HOLE-IN-ROCK             9150     2.0     4.7    43     10.3     9.7   106 
 INDIAN CREEK             9425    21.4    28.3    76     21.1    29.5    72 
 KELLEY R.S.              8180     8.9    14.1    63     15.1    23.6    64 
 STEEL CREEK PARK        10100    15.8    18.6    85     15.7    20.2    78 
                                                -----                  -----
                Basin wide percent of average     61                     77 


UPPER BEAR RIVER

 BUG LAKE                 7950    10.7    18.0    59     17.3    22.4    77 
 HAYDEN FORK              9400     4.5    13.0    35     19.9    25.1    79 
 KELLEY R.S.              8180     8.9    14.1    63     15.1    23.6    64 
 LILY LAKE                9050     3.3    11.1    30     16.5    21.1    78 
 MONTE CRISTO             8960     9.2    28.3    33     23.1    30.3    76 
 SALT RIVER SUMMIT        7600     4.2    10.6    40     15.1    21.6    70 
 TRIAL LAKE               9960    12.4    26.5    47     19.2    29.4    65 
                                                -----                  -----
                Basin wide percent of average     44                     73 

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


 -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.