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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 17 , 1998 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030     1.7     4.2    40     24.1    26.6    91 
 COTTONWOOD CREEK         7600    10.1    12.4    81     28.4    29.7    96 
 GRANITE CREEK            6770     5.1     6.6    77     23.8    28.3    84 
 GRASSY LAKE              7265    20.2    25.4    80     40.3    44.2    91 
 GROS VENTRE SUMMIT       8775     8.2     8.9    92     16.3    19.1    85 
 LEWIS LAKE DIVIDE        7860    21.7    28.4    76     36.9    44.9    82 
 PHILLIPS BENCH           8200    23.2    24.4    95     30.8    35.4    87 
 SALT RIVER SUMMIT        7600     3.6      .0      *    23.3    20.3   115 
 SNAKE RIVER STATION      6920      .5    10.1     5     26.2    31.0    85 
 SPRING CREEK DIVIDE      9000    20.7    25.2    82     26.3    32.3    81 
 THUMB DIVIDE             7980     5.4     9.9    55     21.4    24.9    86 
 TOGWOTEE PASS            9580    23.2    25.7    90     28.1    33.7    83 
 TWO OCEAN PLATEAU        9360    27.7    25.9   107     31.8    36.6    87 
 WILLOW CREEK             8450    17.7    26.8    66     37.8    38.2    99 
                                                -----                  -----
                Basin wide percent of average     79                     89 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275    17.1    24.3    70     19.1    23.2    82 
 BLACK BEAR               7950    35.8    35.9   100     42.8    48.6    88 
 CANYON                   7940     2.3     5.9    39     17.0    17.6    97 
 FISHER CREEK             9100    27.3    36.7    74     32.3    44.7    72 
 MADISON PLATEAU          7750    15.6    17.6    89     28.2    31.7    89 
 NORTHEAST ENTRANCE       7350      .0     2.3     0     13.3    15.2    88 
 PARKER PEAK              9400    14.5    22.2    65     18.7    19.9    94 
 SYLVAN LAKE              8420    10.3    19.8    52     24.0    24.4    98 
 THUMB DIVIDE             7980     5.4     9.9    55     21.4    24.9    86 
 TWO OCEAN PLATEAU        9360    27.7    25.9   107     31.8    36.6    87 
 WHISKEY CREEK            6800     8.5     8.5   100     23.4    26.3    89 
 WHITE MILL               8700    20.3    24.3    84     24.5    34.7    71 
 WOLVERINE                7650      .0     2.6     0     11.5    16.7    69 
                                                -----                  -----
                Basin wide percent of average     78                     84 


WIND RIVER

 BURROUGHS CREEK          8750    11.8     6.3   187     20.3    21.0    97 
 COLD SPRINGS             9630     5.7     2.5   228     16.4    14.6   112 
 DEER PARK                9700      -M      -M      *    26.2      -M      *
 HOBBS PARK              10100    19.5    16.0   122     20.5    19.2   107 
 LITTLE WARM              9620     5.9     4.8   123     17.2    17.8    97 
 SOUTH PASS               9040    12.8    15.7    82     22.7    22.4   101 
 ST. LAWRENCE ALT         8620     3.2     2.1   152     15.0    13.7   109 
 TOGWOTEE PASS            9580    23.2    25.7    90     28.1    33.7    83 
 TOWNSEND CREEK           8700     6.7     5.6   120     18.7    17.1   109 
                                                -----                  -----
                Basin wide percent of average    113                    100 


BIGHORN BASIN

 BALD MTN.                9375    19.3    23.7    81     20.6    23.1    89 
 BEAR TRAP MEADOW         7900      .0     1.2     0     13.7    12.3   111 
 BLACKWATER               9780    20.9    24.1    87     21.6    22.4    96 
 BONE SPRINGS DIV         9350    15.1    15.6    97     20.3    20.2   100 
 EVENING STAR             9200    19.2    29.7    65     28.3    28.0   101 
 GRAVE SPRINGS            8550     7.9      -M      *    15.6    14.4   108 
 KIRWIN                   9550    10.5     9.5   111     17.4    14.8   118 
 MARQUETTE                8760    10.4     7.2   144     17.4    15.5   112 
 MIDDLE POWDER            7760     6.3    12.6    50     14.5    16.6    87 
 OWL CREEK                8975      .1      .9    11     10.9     9.4   116 
 POWDER RIVER PASS        9480     8.4     5.6   150     17.5    16.5   106 
 SHELL CREEK              9580    12.9    16.3    79     14.5    17.9    81 
 SYLVAN LAKE              8420    10.3    19.8    52     24.0    24.4    98 
 SYLVAN ROAD              8120      .1     3.6     3     16.0    20.3    79 
 TIMBER CREEK             7950      .6     2.2    27     13.0    12.0   108 
 YOUNTS PEAK              8350    12.8    15.0    85     18.0    20.8    87 
                                                -----                  -----
                Basin wide percent of average     79                     98 


SHOSHONE RIVER

 BLACKWATER               9780    20.9    24.1    87     21.6    22.4    96 
 EVENING STAR             9200    19.2    29.7    65     28.3    28.0   101 
 KIRWIN                   9550    10.5     9.5   111     17.4    14.8   118 
 MARQUETTE                8760    10.4     7.2   144     17.4    15.5   112 
 SYLVAN LAKE              8420    10.3    19.8    52     24.0    24.4    98 
 SYLVAN ROAD              8120      .1     3.6     3     16.0    20.3    79 
 YOUNTS PEAK              8350    12.8    15.0    85     18.0    20.8    87 
                                                -----                  -----
                Basin wide percent of average     77                     98 


POWDER-TONGUE

 BEAR TRAP MEADOW         7900      .0     1.2     0     13.7    12.3   111 
 BONE SPRINGS DIV         9350    15.1    15.6    97     20.3    20.2   100 
 BURGESS JUNCTION         7880     7.4    10.1    73     15.4    16.1    96 
 CLOUD PEAK RESERVOIR     9860    14.9    15.2    98     21.0    19.3   109 
 DOME LAKE                8880      -M     9.5      *    17.2    18.4    93 
 GRAVE SPRINGS            8550     7.9      -M      *    15.6    14.4   108 
 HANSEN SAWMILL           8760      .5     3.6    14     14.5    11.7   124 
 MIDDLE POWDER            7760     6.3    12.6    50     14.5    16.6    87 
 POWDER RIVER PASS        9480     8.4     5.6   150     17.5    16.5   106 
 SUCKER CREEK             8880     6.5     9.7    67     17.3    18.6    93 
 TIE CREEK                6870      .0      -M      *    16.6    15.5   107 
                                                -----                  -----
                Basin wide percent of average     80                    102 


BELLE FOURCHE

 BLIND PARK               6890      .5     4.1    12     15.7    16.1    98 
 NORTH RAPID CREEK        6130      .0      -M      *    13.3      -M      *
 WARREN PEAK              6520      .3     4.1     7     13.6    11.8   115 
                                                -----                  -----
                Basin wide percent of average     10                    105 


UPPER N. PLATTE RIVER

 COLUMBINE                9400      .7    12.8     5     27.2    29.5    92 
 DIVIDE PEAK              8800     9.0    11.4    79     24.5    29.1    84 
 ELK RIVER                8700     2.0     7.5    27     24.0    23.3   103 
 JOE WRIGHT              10120    21.2    22.9    93     30.1    32.7    92 
 NORTH FRENCH CREEK      10100    32.3    25.9   125     35.8    30.2   119 
 OLD BATTLE              10000    35.1    35.4    99     41.6    37.7   110 
 SOUTH BRUSH CREEK        8400      .9     5.3    17     16.7    22.0    76 
 TOWER                   10500    54.0    50.0   108     47.8    46.4   103 
 WEBBER SPRINGS           9200    13.1    19.3    68     30.5    32.2    95 
 WILLOW CREEK PASS        9540     6.6     9.7    68     10.8    16.9    64 
                                                -----                  -----
                Basin wide percent of average     87                     96 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    19.4    23.5    83     27.4    25.5   107 
 CASPER MTN.              7900      .2    10.3     2     15.7    20.9    75 
 DEADMAN HILL            10220    15.7    17.6    89     19.3    22.9    84 
 DEER PARK                9700      -M      -M      *    26.2      -M      *
 LAPRELE CREEK            8320      .0     3.1     0     13.1    16.5    79 
 RENO HILL                8400      .0     7.9     0     14.5    23.4    62 
 ROACH                    9700    12.1    15.0    81     21.7    28.1    77 
 SAND LAKE               10080    29.9    34.1    88     29.9    26.7   112 
 SOUTH PASS               9040    12.8    15.7    82     22.7    22.4   101 
 WINDY PEAK               7840      .0     3.1     0     11.6    14.0    83 
                                                -----                  -----
                Basin wide percent of average     69                     88 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440      .2      .0      *    18.1    19.7    92 
 DIVIDE PEAK              8800     9.0    11.4    79     24.5    29.1    84 
 OLD BATTLE              10000    35.1    35.4    99     41.6    37.7   110 
 SANDSTONE RS             8150      .0     2.0     0     22.9    24.5    93 
 WHISKEY PARK             8950    28.4    23.7   120     34.7    36.2    96 
                                                -----                  -----
                Basin wide percent of average    100                     96 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100     8.4     8.6    98     16.2    19.6    83 
 BLIND BULL SUM           8650    21.8    21.7   100     22.7    28.2    80 
 EAST RIM DIVIDE          7930     7.6    12.0    63     14.4    18.3    79 
 ELKHART PARK G.S.        9400     8.6     9.2    93     17.2    19.2    90 
 GROS VENTRE SUMMIT       8775     8.2     8.9    92     16.3    19.1    85 
 KENDALL R.S.             7740      .0      .0   100*    17.9    18.7    96 
 LOOMIS PARK              8240      -M    10.0      *    20.5    22.6    91 
 NEW FORK LAKE            8340     1.0     5.5    18     14.0    17.4    80 
 SNIDER BASIN             8250     6.0     7.5    80     15.7    18.2    86 
 SPRING CREEK DIVIDE      9000    20.7    25.2    82     26.3    32.3    81 
 TRIPLE PEAK              8500    12.2    20.4    60     26.2    37.0    71 
                                                -----                  -----
                Basin wide percent of average     79                     83 


LOWER GREEN RIVER

 HAMS FORK                7840      .0      .0   100*    14.1    16.1    88 
 HEWINTA                  9500     3.2      .0      *    18.6    17.7   105 
 HICKERSON PARK           9150     5.5      .5  1100*    17.8    13.8   129 
 HOLE-IN-ROCK             9150     1.1      .5   220*    15.3    13.8   111 
 INDIAN CREEK             9425    22.2    24.0    93     24.1    30.8    78 
 KELLEY R.S.              8180     7.6     8.8    86     20.4    22.6    90 
 STEEL CREEK PARK        10100    22.0    16.1   137     23.1    18.0   128 
                                                -----                  -----
                Basin wide percent of average    117*                   100 


UPPER BEAR RIVER

 BUG LAKE                 7950    13.0     9.2   141     25.4    23.8   107 
 HAYDEN FORK              9400     5.8      .6   967*    25.9    24.7   105 
 KELLEY R.S.              8180     7.6     8.8    86     20.4    22.6    90 
 LILY LAKE                9050     6.4     5.1   125     22.5    19.6   115 
 MONTE CRISTO             8960      -M    20.5      *      -M    32.1      *
 SALT RIVER SUMMIT        7600     3.6      .0      *    23.3    20.3   115 
 TRIAL LAKE               9960    20.6    19.9   104     29.0    30.1    96 
                                                -----                  -----
                Basin wide percent of average    122                    104 

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


-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.