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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 WEDNESDAY: MAY 21 , 2003 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030      -M     4.2      *      -M    26.1      *
 COTTONWOOD CREEK         7600     5.2    10.8    48     27.9    34.4    81 
 GRANITE CREEK            6770      -M     5.3      *      -M    24.0      *
 GRASSY LAKE              7265      -M    22.1      *      -M    43.6      *
 GROS VENTRE SUMMIT       8775      -M     7.7      *      -M    16.8      *
 LEWIS LAKE DIVIDE        7860      -M    25.1      *      -M    44.1      *
 PHILLIPS BENCH           8200      -M    20.5      *      -M    35.4      *
 SALT RIVER SUMMIT        7600      -M     3.2      *      -M    23.2      *
 SNAKE RIVER STATION      6920      .0     3.7     0     25.1    27.4    92 
 SPRING CREEK DIVIDE      9000    20.4    21.3    96     26.6    32.1    83 
 THUMB DIVIDE             7980     3.4     6.9    49     21.5    23.8    90 
 TOGWOTEE PASS            9580      -M    25.5      *      -M    31.4      *
 TWO OCEAN PLATEAU        9360    36.3    28.8   126     31.5    34.8    91 
 WILLOW CREEK             8450      -M    21.4      *      -M    40.9      *
                                                -----                  -----
                Basin wide percent of average     91*                    87*


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275      -M    23.6      *      -M    25.8      *
 BLACK BEAR               8170      -M    32.8      *      -M    48.7      *
 CANYON                   8090      -M     5.1      *      -M    19.5      *
 FISHER CREEK             9100    41.0    34.3   120     41.8    45.0    93 
 MADISON PLATEAU          7750    16.3    15.8   103     27.6    32.9    84 
 NORTHEAST ENTRANCE       7350      -M     2.3      *      -M    16.6      *
 PARKER PEAK              9400    25.2    22.1   114     25.3    21.9   116 
 SYLVAN LAKE              8420      -M    17.2      *      -M    27.5      *
 THUMB DIVIDE             7980     3.4     6.9    49     21.5    23.8    90 
 TWO OCEAN PLATEAU        9360    36.3    28.8   126     31.5    34.8    91 
 WHISKEY CREEK            6800      -M     6.8      *      -M    26.2      *
 WHITE MILL               8700    30.6    22.3   137     29.2    33.8    86 
 WOLVERINE                7650      .0     2.1     0     14.6    17.2    85 
                                                -----                  -----
                Basin wide percent of average    115                     91 


WIND RIVER

 BURROUGHS CREEK          8750      -M     7.9      *      -M    21.4      *
 COLD SPRINGS             9630      -M     2.5      *      -M    16.0      *
 DEER PARK                9700    11.3    14.0    81     22.5    29.5    76 
 HOBBS PARK              10100    10.9    14.4    76     17.8    19.5    91 
 LITTLE WARM              9370      -M     5.7      *      -M    18.9      *
 SOUTH PASS               9040     3.3    11.3    29     18.1    24.8    73 
 ST. LAWRENCE ALT         8620      .1     2.6     4     11.8    14.1    84 
 TOGWOTEE PASS            9580      -M    25.5      *      -M    31.4      *
 TOWNSEND CREEK           8700      .0     4.3     0     15.8    17.6    90 
                                                -----                  -----
                Basin wide percent of average     55                     82 


BIGHORN BASIN

 BALD MTN.                9380    20.8    20.8   100     21.6    23.9    90 
 BEAR TRAP MEADOW         8200      .0      .5     0*    12.5    13.0    96 
 BLACKWATER               9780    29.8    27.4   109     27.8    27.4   101 
 BONE SPRINGS DIV         9350    16.7    13.4   125     21.6    20.9   103 
 EVENING STAR             9200    31.9    30.5   105     38.7    32.8   118 
 GRAVE SPRINGS            8550     1.1     5.7    19     12.2    15.0    81 
 KIRWIN                   9550    11.5     9.1   126     17.2    16.3   106 
 MARQUETTE                8760      -M     7.2      *      -M    16.5      *
 MIDDLE POWDER            7760     4.9     8.1    60     11.9    17.9    66 
 OWL CREEK                8975      -M     1.7      *      -M    10.1      *
 POWDER RIVER PASS        9480     6.7     6.1   110     16.9    18.3    92 
 SHELL CREEK              9580    16.3    14.2   115     18.0    19.2    94 
 SYLVAN LAKE              8420      -M    17.2      *      -M    27.5      *
 SYLVAN ROAD              7120      -M     1.7      *      -M    22.3      *
 TIMBER CREEK             7950      .6     1.6    37     12.5    13.0    96 
 YOUNTS PEAK              8350      -M    12.4      *      -M    20.9      *
                                                -----                  -----
                Basin wide percent of average    102                     97 


SHOSHONE RIVER

 BLACKWATER               9780    29.8    27.4   109     27.8    27.4   101 
 EVENING STAR             9200    31.9    30.5   105     38.7    32.8   118 
 KIRWIN                   9550    11.5     9.1   126     17.2    16.3   106 
 MARQUETTE                8760      -M     7.2      *      -M    16.5      *
 SYLVAN LAKE              8420      -M    17.2      *      -M    27.5      *
 SYLVAN ROAD              7120      -M     1.7      *      -M    22.3      *
 YOUNTS PEAK              8350      -M    12.4      *      -M    20.9      *
                                                -----                  -----
                Basin wide percent of average    109*                   109*


POWDER-TONGUE

 BEAR TRAP MEADOW         8200      .0      .5     0*    12.5    13.0    96 
 BIG GOOSE                7990     8.5     6.8   125     18.4    15.2   121 
 BONE SPRINGS DIV         9350    16.7    13.4   125     21.6    20.9   103 
 BURGESS JUNCTION         7880    11.4     7.5   152     18.9    17.4   109 
 CLOUD PEAK RESERVOIR     9860    16.6    12.3   135     19.6    20.1    98 
 DOME LAKE                8880     8.5     7.9   108     20.6    19.3   107 
 GRAVE SPRINGS            8550     1.1     5.7    19     12.2    15.0    81 
 HANSEN SAWMILL           8360      .3     1.5    20     14.5    13.0   112 
 MIDDLE POWDER            7760     4.9     8.1    60     11.9    17.9    66 
 POWDER RIVER PASS        9480     6.7     6.1   110     16.9    18.3    92 
 SUCKER CREEK             8880    12.6     7.9   159     22.5    20.0   112 
 TIE CREEK                6870      .1      .8    12     19.4    15.9   122 
                                                -----                  -----
                Basin wide percent of average    111                    101 


BELLE FOURCHE

 BLIND PARK               6890      .2      .1   200*    14.7    16.6    89 
 COLE CANYON              5910      .0      -M      *    12.8      -M      *
 NORTH RAPID CREEK        6130      .0      .4     0*    13.0    13.1    99 
                                                -----                  -----
                Basin wide percent of average     40*                    93 


UPPER N. PLATTE RIVER

 COLUMBINE                9400     6.1     9.2    66     31.4    31.1   101 
 DIVIDE PEAK              8800     9.4     9.6    98     27.4    26.4   104 
 ELK RIVER                8700      .4     5.4     7     25.3    24.9   102 
 JOE WRIGHT              10120    29.5    21.4   138     39.0    33.1   118 
 NORTH FRENCH CREEK      10100    36.1    29.9   121     38.6    32.7   118 
 OLD BATTLE              10000      -M    32.0      *      -M    42.7      *
 SAGE CREEK BASIN         7850      .0     5.5     0     16.6    15.3   108 
 SOUTH BRUSH CREEK        8400     3.0     4.8    62     23.9    22.4   107 
 TOWER                   10500    49.7    48.3   103     55.2    48.3   114 
 WEBBER SPRINGS           9200     9.4    14.0    67     31.6    33.4    95 
 WILLOW CREEK PASS        9540    18.2     8.4   217     21.8    17.7   123 
                                                -----                  -----
                Basin wide percent of average    103                    109 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    15.4    19.0    81     27.8    29.6    94 
 CASPER MTN.              7900     4.1     9.1    45     16.8    22.4    75 
 DEADMAN HILL            10220    18.8    15.6   121     26.2    23.4   112 
 DEER PARK                9700    11.3    14.0    81     22.5    29.5    76 
 LAPRELE CREEK            8320      .1     2.6     4     16.4    18.8    87 
 RENO HILL                8400     8.2     7.5   109     21.0    23.1    91 
 ROACH                    9700    13.2    10.8   122     25.5    25.0   102 
 SAND LAKE               10080    32.3    32.1   101     32.3    32.5    99 
 SOUTH PASS               9040     3.3    11.3    29     18.1    24.8    73 
 WINDY PEAK               7840      .2     1.1    18     16.5    15.8   104 
                                                -----                  -----
                Basin wide percent of average     87                     91 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .0      .4     0*    20.2    20.1   100 
 DIVIDE PEAK              8800     9.4     9.6    98     27.4    26.4   104 
 OLD BATTLE              10000      -M    32.0      *      -M    42.7      *
 SANDSTONE RS             8150      .3     2.5    12     24.5    23.8   103 
 WHISKEY PARK             8950      -M    21.9      *      -M    36.4      *
                                                -----                  -----
                Basin wide percent of average     78*                   103 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100     1.6     6.3    25     14.6    17.6    83 
 BLIND BULL SUM           8650      -M    22.4      *      -M    27.1      *
 EAST RIM DIVIDE          7930     1.7     6.5    26     11.9    15.3    78 
 ELKHART PARK G.S.        9400      -M     7.2      *      -M    17.9      *
 GROS VENTRE SUMMIT       8775      -M     7.7      *      -M    16.8      *
 KENDALL R.S.             7740      .0     2.4     0     15.2    17.9    85 
 LOOMIS PARK              8240      -M     7.1      *      -M    21.6      *
 NEW FORK LAKE            8340      .0     2.5     0       -M    15.0      *
 SNIDER BASIN             8250      .0     5.0     0     15.1    19.7    77 
 SPRING CREEK DIVIDE      9000    20.4    21.3    96     26.6    32.1    83 
 TRIPLE PEAK              8500     7.9    12.8    62     30.7    30.7   100 
                                                -----                  -----
                Basin wide percent of average     56                     86 


LOWER GREEN RIVER

 HAMS FORK                7840      .0      .7     0*    14.1    16.2    87 
 HEWINTA                  9500      -M     3.1      *      -M    19.4      *
 HICKERSON PARK           9150      .0     1.4     0     12.4    11.7   106 
 HOLE-IN-ROCK             9150      .0     1.1     0     13.3    11.3   118 
 INDIAN CREEK             9425    18.0    20.5    88     23.7    31.4    75 
 KELLEY R.S.              8180      .5     6.4     8     16.4    25.3    65 
 STEEL CREEK PARK        10100    16.0    15.9   101     18.7    22.1    85 
                                                -----                  -----
                Basin wide percent of average     75                     84 


UPPER BEAR RIVER

 BUG LAKE                 7950     1.9     8.0    24     20.4    24.1    85 
 HAYDEN FORK              9400      .6     5.2    12     22.2    27.3    81 
 KELLEY R.S.              8180      .5     6.4     8     16.4    25.3    65 
 LILY LAKE                9050      .0     4.6     0     18.7    23.0    81 
 MONTE CRISTO             8960     4.2    19.1    22     26.8    32.7    82 
 SALT RIVER SUMMIT        7600      -M     3.2      *      -M    23.2      *
 TRIAL LAKE               9960     9.1    20.1    45     22.9    31.9    72 
                                                -----                  -----
                Basin wide percent of average     26                     78 

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


 -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.