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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 SUNDAY: MAY 18 , 1997 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    12.1     4.0   302     39.1    26.7   146 
 COTTONWOOD CREEK         7600    19.1    11.5   166     40.0    29.8   134 
 GRANITE CREEK            6770    15.2     6.3   241     35.8    28.4   126 
 GRASSY LAKE              7265    31.4    24.5   128     61.8    44.3   140 
 GROS VENTRE SUMMIT       8775    15.2     8.3   183     23.4    19.2   122 
 LEWIS LAKE DIVIDE        7860    43.0    27.9   154     64.5    45.1   143 
 PHILLIPS BENCH           8200    35.0    23.9   146     51.2    35.5   144 
 SALT RIVER SUMMIT        7600     4.9      .0      *    27.1    20.4   133 
 SNAKE RIVER STATION      6920      -M     9.5      *      -M    31.1      *
 SPRING CREEK DIVIDE      9000    29.1    24.8   117     37.6    32.4   116 
 THUMB DIVIDE             7980    15.9     9.2   173     37.9    25.0   152 
 TOGWOTEE PASS            9580    29.4    25.6   115     40.2    33.8   119 
 TWO OCEAN PLATEAU        9360    43.4    25.6   170       -M    36.7      *
 WILLOW CREEK             8450    32.6    26.3   124     53.8    38.3   140 
                                                -----                  -----
                Basin wide percent of average    147                    135 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275      -M    23.9      *    35.5    23.3   152 
 BLACK BEAR               7950      -M    35.3      *      -M    48.7      *
 CANYON                   7940    11.3     5.6   202     29.9    17.7   169 
 FISHER CREEK             9100      -M    36.4      *      -M    44.8      *
 MADISON PLATEAU          7750    28.5    16.9   169     46.5    31.8   146 
 NORTHEAST ENTRANCE       7350     1.2     2.2    55     23.5    15.3   154 
 PARKER PEAK              9400    31.9    22.0   145       -M    20.0      *
 SYLVAN LAKE              8420      -M    19.5      *    37.5    24.5   153 
 THUMB DIVIDE             7980    15.9     9.2   173     37.9    25.0   152 
 TWO OCEAN PLATEAU        9360    43.4    25.6   170       -M    36.7      *
 WHISKEY CREEK            6800    13.5     8.0   169     35.5    26.4   134 
 WHITE MILL               8700    36.9    23.9   154       -M    34.8      *
 WOLVERINE                7650      -M     2.5      *    19.0    16.8   113 
                                                -----                  -----
                Basin wide percent of average    161                    147 


WIND RIVER

 BURROUGHS CREEK          8750    16.1     6.0   268     29.3    21.1   139 
 CHRISTINA LAKE           9980    17.8    15.8   113     27.9    22.0   127 
 COLD SPRINGS             9630      -M     2.4      *    16.9    14.7   115 
 HOBBS PARK              10100    18.6    15.6   119     19.7    19.3   102 
 LITTLE WARM              9620     8.6     4.6   187     25.7    17.9   144 
 SOUTH PASS               9040    18.7    15.4   121     30.2    22.5   134 
 ST. LAWRENCE ALT         8620      -M     2.0      *    16.4    13.8   119 
 TOGWOTEE PASS            9580    29.4    25.6   115     40.2    33.8   119 
 TOWNSEND CREEK           8700     3.3     5.3    62     18.4    17.2   107 
                                                -----                  -----
                Basin wide percent of average    127                    123 


BIGHORN BASIN

 BALD MTN.                9375    21.9    23.4    94     23.0    23.3    99 
 BEAR TRAP MEADOW         7900      .1     1.2     8     13.3    12.4   107 
 BLACKWATER               9780    38.7    23.7   163     34.5    22.5   153 
 BONE SPRINGS DIV         9350    19.0    15.1   126     21.5    20.3   106 
 EVENING STAR             9200      -M    29.5      *    46.9    28.1   167 
 GRAVE SPRINGS            8550     4.7      -M      *    14.8    14.5   102 
 KIRWIN                   9550    10.1     9.2   110     20.5    14.9   138 
 LOST CREEK               8080    16.4    12.2   134     20.6    17.1   120 
 MARQUETTE                8760     8.5     7.0   121     16.4    15.6   105 
 MIDDLE POWDER            7760    10.6    12.0    88     19.0    16.7   114 
 OWL CREEK                8975      .2      .8    25      9.6     9.5   101 
 POWDER RIVER PASS        9480    11.3     5.3   213     18.4    16.6   111 
 SHELL CREEK              9580      -M    16.0      *    19.7    18.0   109 
 SYLVAN LAKE              8420      -M    19.5      *    37.5    24.5   153 
 SYLVAN ROAD              8120     2.1     3.5    60     30.7    20.4   150 
 TIMBER CREEK             7950      .1     2.1     5     11.5    12.1    95 
 YOUNTS PEAK              8350    20.4    14.6   140       -M    20.9      *
                                                -----                  -----
                Basin wide percent of average    123                    125 


SHOSHONE RIVER

 BLACKWATER               9780    38.7    23.7   163     34.5    22.5   153 
 EVENING STAR             9200      -M    29.5      *    46.9    28.1   167 
 KIRWIN                   9550    10.1     9.2   110     20.5    14.9   138 
 MARQUETTE                8760     8.5     7.0   121     16.4    15.6   105 
 SYLVAN LAKE              8420      -M    19.5      *    37.5    24.5   153 
 SYLVAN ROAD              8120     2.1     3.5    60     30.7    20.4   150 
 YOUNTS PEAK              8350    20.4    14.6   140       -M    20.9      *
                                                -----                  -----
                Basin wide percent of average    138                    148 


POWDER-TONGUE

 BEAR TRAP MEADOW         7900      .1     1.2     8     13.3    12.4   107 
 BONE SPRINGS DIV         9350    19.0    15.1   126     21.5    20.3   106 
 BURGESS JUNCTION         7880    11.1     9.5   117     18.1    16.2   112 
 CLOUD PEAK RESERVOIR     9860    17.8    14.7   121     20.9    19.4   108 
 DOME LAKE                8880     9.6     9.2   104     19.9    18.5   108 
 GRAVE SPRINGS            8550     4.7      -M      *    14.8    14.5   102 
 HANSEN SAWMILL           8760      .0     3.4     0     12.2    11.8   103 
 LOST CREEK               8080    16.4    12.2   134     20.6    17.1   120 
 MIDDLE POWDER            7760    10.6    12.0    88     19.0    16.7   114 
 POWDER RIVER PASS        9480    11.3     5.3   213     18.4    16.6   111 
 SUCKER CREEK             8880    13.9     9.4   148     22.1    18.7   118 
 TIE CREEK                6870      .2      -M      *    18.0    15.6   115 
                                                -----                  -----
                Basin wide percent of average    119                    111 


BELLE FOURCHE

 BLIND PARK               6890      .0     3.8     0     20.0    16.2   123 
 NORTH RAPID CREEK        6130      .1      -M      *    18.7      -M      *
 WARREN PEAK              6520     7.9     3.8   208       -M    11.9      *
                                                -----                  -----
                Basin wide percent of average    104                    123*


UPPER N. PLATTE RIVER

 COLUMBINE                9400    12.1    12.1   100     38.7    29.6   131 
 DIVIDE PEAK              8800    12.9    10.8   119     29.6    29.2   101 
 ELK RIVER                8700     9.9     7.0   141     31.4    23.4   134 
 JOE WRIGHT              10120    29.4    22.5   131     37.9    32.8   116 
 NORTH FRENCH CREEK      10100    32.9    25.6   129     36.6    30.4   120 
 OLD BATTLE              10000    43.9    34.6   127     46.7    37.8   124 
 SOUTH BRUSH CREEK        8400      .0     5.0     0     21.9    22.1    99 
 TOWER                   10500    60.5    49.7   122     59.8    46.6   128 
 WEBBER SPRINGS           9200    22.9    18.7   122     42.6    32.3   132 
 WILLOW CREEK PASS        9540    17.6     9.2   191     20.7    17.0   122 
                                                -----                  -----
                Basin wide percent of average    124                    121 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    29.0    22.8   127     35.0    25.6   137 
 CASPER MTN.              7900    15.1     9.8   154     27.5    21.0   131 
 CHRISTINA LAKE           9980    17.8    15.8   113     27.9    22.0   127 
 DEADMAN HILL            10220    18.6    17.1   109     24.8    23.0   108 
 LAPRELE CREEK            8320      .0     3.0     0     18.6    16.6   112 
 RENO HILL                8400    14.7     7.6   193     26.8    23.4   115 
 ROACH                    9700    19.0    14.5   131     28.2    28.2   100 
 SAND LAKE               10080    42.6    33.5   127     36.9    26.8   138 
 SOUTH PASS               9040    18.7    15.4   121     30.2    22.5   134 
 WINDY PEAK               7840      .2     2.9     7     14.3    14.1   101 
                                                -----                  -----
                Basin wide percent of average    123                    121 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .3      .0      *      -M    19.8      *
 DIVIDE PEAK              8800    12.9    10.8   119     29.6    29.2   101 
 OLD BATTLE              10000    43.9    34.6   127     46.7    37.8   124 
 SANDSTONE RS             8150      .0     1.9     0     26.3    24.6   107 
 WHISKEY PARK             8950    34.0    23.0   148     41.2    36.4   113 
                                                -----                  -----
                Basin wide percent of average    129                    112 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100     5.4     8.1    67     19.8    19.7   101 
 BLIND BULL SUM           8650    46.3    21.3   217     37.2    28.3   131 
 EAST RIM DIVIDE          7930     8.3    11.7    71     18.9    18.3   103 
 ELKHART PARK G.S.        9400     9.6     8.8   109     21.3    19.3   110 
 GROS VENTRE SUMMIT       8775    15.2     8.3   183     23.4    19.2   122 
 KENDALL R.S.             7740     6.2      .0      *    25.3    18.8   135 
 LOOMIS PARK              8240      -M     9.3      *    30.1    22.7   133 
 NEW FORK LAKE            8340      .3     5.1     6     16.2    17.4    93 
 SNIDER BASIN             8250     7.5     7.0   107     21.8    18.3   119 
 SPRING CREEK DIVIDE      9000    29.1    24.8   117     37.6    32.4   116 
 TRIPLE PEAK              8500    22.1    20.1   110     44.2    37.1   119 
                                                -----                  -----
                Basin wide percent of average    125                    118 


LOWER GREEN RIVER

 HAMS FORK                7840      .0      .0   100*    19.1    16.1   119 
 HEWINTA                  9500      .0      .0   100*    17.2    17.8    97 
 HICKERSON PARK           9150      .0      .5     0*    12.5    13.9    90 
 HOLE-IN-ROCK             9150      .1      .4    25*    12.9    13.9    93 
 INDIAN CREEK             9425    32.1    23.6   136     37.1    30.9   120 
 KELLEY R.S.              8180     9.3     8.2   113     35.3    22.7   156 
 STEEL CREEK PARK        10100    14.7    15.8    93     19.9    18.1   110 
                                                -----                  -----
                Basin wide percent of average    116*                   115 


UPPER BEAR RIVER

 BUG LAKE                 7950    19.7     8.7   226     34.4    23.9   144 
 HAYDEN FORK              9400      .7      .6   117*    30.1    24.8   121 
 KELLEY R.S.              8180     9.3     8.2   113     35.3    22.7   156 
 LILY LAKE                9050      .2     4.9     4     23.9    19.7   121 
 MONTE CRISTO             8960    28.1    19.8   142     39.4    32.2   122 
 SALT RIVER SUMMIT        7600     4.9      .0      *    27.1    20.4   133 
 TRIAL LAKE               9960    25.9    19.4   134     39.1    30.2   129 
                                                -----                  -----
                Basin wide percent of average    136                    132 

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


-M = Missing data
 * = Data may not provide a valid measure of conditions.
 
     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.