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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 FRIDAY: MAY 21 , 1999 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030     9.6     3.3   300     30.9    27.0   115 
 COTTONWOOD CREEK         7600    21.0     9.1   231     36.7    30.2   122 
 GRANITE CREEK            6770    11.0     5.5   202     27.9    28.9    97 
 GRASSY LAKE              7265    39.8    21.9   182     49.8    44.8   111 
 GROS VENTRE SUMMIT       8775    15.4     6.6   232     20.4    19.4   106 
 LEWIS LAKE DIVIDE        7860    38.7    26.2   148     46.2    45.7   102 
 PHILLIPS BENCH           8200    31.7    22.7   141     37.3    35.9   104 
 SALT RIVER SUMMIT        7600     7.5      .0      *    22.9    20.7   111 
 SNAKE RIVER STATION      6920     8.1     7.5   109     30.4    31.5    97 
 SPRING CREEK DIVIDE      9000    37.4    23.7   159     36.3    32.8   111 
 THUMB DIVIDE             7980    17.2     7.3   235     28.0    25.4   111 
 TOGWOTEE PASS            9580      -M    25.2      *    35.8    34.2   105 
 TWO OCEAN PLATEAU        9360    40.8    25.0   163     37.2    37.2   100 
 WILLOW CREEK             8450    31.9    24.9   129     48.9    38.8   127 
                                                -----                  -----
                Basin wide percent of average    165                    109 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275    27.9    23.0   121     28.2    23.7   119 
 BLACK BEAR               7950    58.2    33.8   173     55.4    49.3   113 
 CANYON                   7940    11.5     4.8   238     22.9    18.0   127 
 FISHER CREEK             9100    40.3    35.4   114     43.9    45.3    97 
 MADISON PLATEAU          7750      -M    15.0      *    39.0    32.2   122 
 NORTHEAST ENTRANCE       7350      .0     1.9     0     17.9    15.6   115 
 PARKER PEAK              9400    26.4    21.4   124       -M    20.4      *
 SYLVAN LAKE              8420    24.2    18.4   132     33.9    24.9   137 
 THUMB DIVIDE             7980    17.2     7.3   235     28.0    25.4   111 
 TWO OCEAN PLATEAU        9360    40.8    25.0   163     37.2    37.2   100 
 WHISKEY CREEK            6800    16.9     6.6   255     30.2    26.7   113 
 WHITE MILL               8700    29.7    23.0   130     30.2    35.3    86 
 WOLVERINE                7650      .0     2.0     0     15.4    17.2    90 
                                                -----                  -----
                Basin wide percent of average    145                    109 


WIND RIVER

 BURROUGHS CREEK          8750    18.0     5.3   347     23.5    21.5   110 
 COLD SPRINGS             9630    16.9     2.0   841     24.9    15.1   165 
 DEER PARK                9700    26.5      -M      *    34.2      -M      *
 HOBBS PARK              10100    31.2    14.4   218     29.2    19.7   149 
 LITTLE WARM              9620    18.7     3.8   490     25.2    18.4   138 
 SOUTH PASS               9040    22.7    14.4   159     31.2    22.9   137 
 ST. LAWRENCE ALT         8620     9.9     1.7   613     21.7    14.0   156 
 TOGWOTEE PASS            9580      -M    25.2      *    35.8    34.2   105 
 TOWNSEND CREEK           8700    16.4     4.6   355     26.7    17.7   152 
                                                -----                  -----
                Basin wide percent of average    292                    134 


BIGHORN BASIN

 BALD MTN.                9375    26.2    22.4   117     26.2    23.9   110 
 BEAR TRAP MEADOW         7900      .9     1.0    81     18.2    12.9   142 
 BLACKWATER               9780    36.5    22.7   161     31.2    22.9   137 
 BONE SPRINGS DIV         9350    22.9    13.7   168     25.7    20.9   124 
 EVENING STAR             9200    35.7    28.7   125     41.2    28.5   145 
 GRAVE SPRINGS            8550     9.0     8.0   114     19.0    15.0   128 
 KIRWIN                   9550    17.7     8.5   211     21.7    15.2   143 
 MARQUETTE                8760    18.9     6.5   294     22.0    16.0   138 
 MIDDLE POWDER            7760    15.7    10.0   158     23.0    17.0   136 
 OWL CREEK                8975     9.5      .7  1343     15.5     9.9   159 
 POWDER RIVER PASS        9480    12.5     4.5   276     22.9    17.0   135 
 SHELL CREEK              9580    19.7    15.0   131     21.4    18.5   116 
 SYLVAN LAKE              8420    24.2    18.4   132     33.9    24.9   137 
 SYLVAN ROAD              8120      -M     3.0      *      -M    20.7      *
 TIMBER CREEK             7950    10.0     1.7   589     18.4    12.5   148 
 YOUNTS PEAK              8350    20.4    13.5   152     22.7    21.4   107 
                                                -----                  -----
                Basin wide percent of average    160                    132 


SHOSHONE RIVER

 BLACKWATER               9780    36.5    22.7   161     31.2    22.9   137 
 EVENING STAR             9200    35.7    28.7   125     41.2    28.5   145 
 KIRWIN                   9550    17.7     8.5   211     21.7    15.2   143 
 MARQUETTE                8760    18.9     6.5   294     22.0    16.0   138 
 SYLVAN LAKE              8420    24.2    18.4   132     33.9    24.9   137 
 SYLVAN ROAD              8120      -M     3.0      *      -M    20.7      *
 YOUNTS PEAK              8350    20.4    13.5   152     22.7    21.4   107 
                                                -----                  -----
                Basin wide percent of average    157                    135 


POWDER-TONGUE

 BEAR TRAP MEADOW         7900      .9     1.0    81     18.2    12.9   142 
 BIG GOOSE                7990     9.0      -M      *    19.7      -M      *
 BONE SPRINGS DIV         9350    22.9    13.7   168     25.7    20.9   124 
 BURGESS JUNCTION         7880    11.4     8.0   142     18.7    16.7   113 
 CLOUD PEAK RESERVOIR     9860    23.5    13.5   176     25.9    19.9   131 
 DOME LAKE                8880      -M     8.1      *    18.5    18.9    98 
 GRAVE SPRINGS            8550     9.0     8.0   114     19.0    15.0   128 
 HANSEN SAWMILL           8760     1.4     2.9    49     18.0    12.1   149 
 MIDDLE POWDER            7760    15.7    10.0   158     23.0    17.0   136 
 POWDER RIVER PASS        9480    12.5     4.5   276     22.9    17.0   135 
 SUCKER CREEK             8880    15.1     8.4   182     23.4    19.2   122 
 TIE CREEK                6870     2.8      -M      *    19.4    16.0   122 
                                                -----                  -----
                Basin wide percent of average    161                    126 


BELLE FOURCHE

 BLIND PARK               6890      .2     3.0     4     20.4    16.7   123 
 NORTH RAPID CREEK        6130      .0      -M      *    17.9      -M      *
 WARREN PEAK              6520      .0     3.2     0       -M    12.4      *
                                                -----                  -----
                Basin wide percent of average      2                    123*


UPPER N. PLATTE RIVER

 COLUMBINE                9400     7.6    10.1    76     30.2    30.0   101 
 DIVIDE PEAK              8800    16.0     9.2   173     32.8    29.7   111 
 ELK RIVER                8700     5.8     5.6   102     30.2    23.7   128 
 JOE WRIGHT              10120    22.9    21.4   107     34.4    33.3   104 
 NORTH FRENCH CREEK      10100    41.8    24.5   171     40.2    30.9   131 
 OLD BATTLE              10000    40.0    32.4   124     48.7    38.3   127 
 SOUTH BRUSH CREEK        8400     9.0     4.3   215     27.4    22.4   122 
 TOWER                   10500      -M    48.7      *      -M    47.3      *
 WEBBER SPRINGS           9200    17.4    17.0   102     35.3    32.8   108 
 WILLOW CREEK PASS        9540    12.9     7.8   165     16.9    17.4    98 
                                                -----                  -----
                Basin wide percent of average    131                    115 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    26.0    20.7   126     33.0    26.0   127 
 CASPER MTN.              7900     7.3     8.5    85     23.9    21.5   112 
 DEADMAN HILL            10220    20.2    15.7   129     24.9    23.4   107 
 DEER PARK                9700    26.5      -M      *    34.2      -M      *
 LAPRELE CREEK            8320      .0     2.7     0     21.7    16.9   129 
 RENO HILL                8400     9.5     6.6   144     27.2    23.7   115 
 ROACH                    9700      -M    13.0      *    26.9    28.7    94 
 SAND LAKE               10080    46.3    31.7   147     39.5    27.2   146 
 SOUTH PASS               9040    22.7    14.4   159     31.2    22.9   137 
 WINDY PEAK               7840      .0     2.3     0     19.2    14.5   132 
                                                -----                  -----
                Basin wide percent of average    129                    121 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .2      .0      *    24.2    20.2   120 
 DIVIDE PEAK              8800    16.0     9.2   173     32.8    29.7   111 
 OLD BATTLE              10000    40.0    32.4   124     48.7    38.3   127 
 SANDSTONE RS             8150      .0     1.5     0*    27.2    25.0   109 
 WHISKEY PARK             8950    28.9    20.7   140     39.5    36.8   108 
                                                -----                  -----
                Basin wide percent of average    133                    115 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100    12.2     6.5   191     19.7    19.9    99 
 BLIND BULL SUM           8650    32.9    20.4   163     28.7    28.7   100 
 EAST RIM DIVIDE          7930    13.0    10.7   121     18.4    18.7    99 
 ELKHART PARK G.S.        9400    14.5     8.0   184     19.9    19.5   102 
 GROS VENTRE SUMMIT       8775    15.4     6.6   232     20.4    19.4   106 
 KENDALL R.S.             7740     6.3      .0      *    20.5    19.0   108 
 LOOMIS PARK              8240      -M     7.5      *    25.4    23.0   111 
 NEW FORK LAKE            8340     7.8     4.1   188     16.9    17.7    95 
 SNIDER BASIN             8250    13.2     5.5   240     23.2    18.5   126 
 SPRING CREEK DIVIDE      9000    37.4    23.7   159     36.3    32.8   111 
 TRIPLE PEAK              8500    28.0    19.0   148     39.3    37.5   105 
                                                -----                  -----
                Basin wide percent of average    168                    106 


LOWER GREEN RIVER

 HAMS FORK                7840      .0      .0      *    18.4    16.4   113 
 HEWINTA                  9500    10.2      .0      *    20.5    18.2   114 
 HICKERSON PARK           9150     1.2      .5   300*    15.5    14.2   110 
 HOLE-IN-ROCK             9150     4.3      .5  1050*    16.0    14.2   112 
 INDIAN CREEK             9425    36.7    22.4   165     34.9    31.2   112 
 KELLEY R.S.              8180    12.1     6.5   187     24.7    23.0   108 
 STEEL CREEK PARK        10100    23.4    15.0   156     24.7    18.5   133 
                                                -----                  -----
                Basin wide percent of average    174*                   115 


UPPER BEAR RIVER

 BUG LAKE                 7950    19.4     7.5   261     29.7    24.2   124 
 HAYDEN FORK              9400    10.5      .5  2100*    29.7    25.2   118 
 KELLEY R.S.              8180    12.1     6.5   187     24.7    23.0   108 
 LILY LAKE                9050     9.6     4.1   235     25.5    20.2   127 
 MONTE CRISTO             8960    39.4    17.7   223     38.5    32.5   119 
 SALT RIVER SUMMIT        7600     7.5      .0      *    22.9    20.7   111 
 TRIAL LAKE               9960    26.7    17.9   150     31.7    30.5   104 
                                                -----                  -----
                Basin wide percent of average    218                    116 

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


-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.