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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 1 , 1998 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    10.9    10.7   102     22.9    25.2    91 
 COTTONWOOD CREEK         7600    16.5    20.0    83     25.6    28.2    91 
 GRANITE CREEK            6770    12.4    12.9    96     22.3    26.8    83 
 GRASSY LAKE              7265    29.1    33.9    86     38.5    41.9    92 
 GROS VENTRE SUMMIT       8775    11.7    13.9    84     14.9    18.1    82 
 LEWIS LAKE DIVIDE        7860    29.4    34.4    85     35.3    42.6    83 
 PHILLIPS BENCH           8200    27.0    29.5    92     29.0    33.6    86 
 SALT RIVER SUMMIT        7600    11.3    10.8   105     20.3    19.2   106 
 SNAKE RIVER STATION      6920    12.7    16.4    77     24.8    29.4    84 
 SPRING CREEK DIVIDE      9000    22.1    29.6    75     24.2    30.8    79 
 THUMB DIVIDE             7980    14.3    15.1    95     20.0    23.6    85 
 TOGWOTEE PASS            9580    25.0    28.3    88     26.7    31.9    84 
 TWO OCEAN PLATEAU        9360    30.7    27.6   111     30.3    34.7    87 
 WILLOW CREEK             8450    23.4    31.9    73     35.0    36.2    97 
                                                -----                  -----
                Basin wide percent of average     88                     88 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275    20.1    26.0    77     18.3    21.2    86 
 BLACK BEAR               7950    40.2    39.8   101     39.9    46.5    86 
 CANYON                   7940    10.4    10.9    95     16.4    16.3   101 
 FISHER CREEK             9100    29.8    38.7    77     30.9    42.2    73 
 MADISON PLATEAU          7750    20.2    23.8    85     25.7    29.9    86 
 NORTHEAST ENTRANCE       7350      .5     5.9     8     12.7    13.9    91 
 PARKER PEAK              9400    19.1    23.7    81     17.9    18.2    98 
 SYLVAN LAKE              8420    16.3    23.8    68     22.6    22.3   101 
 THUMB DIVIDE             7980    14.3    15.1    95     20.0    23.6    85 
 TWO OCEAN PLATEAU        9360    30.7    27.6   111     30.3    34.7    87 
 WHISKEY CREEK            6800    14.9    15.2    98     21.3    24.9    86 
 WHITE MILL               8700    23.1    26.3    88     23.1    32.6    71 
 WOLVERINE                7650     2.6     8.1    32     10.9    15.2    72 
                                                -----                  -----
                Basin wide percent of average     85                     85 


WIND RIVER

 BURROUGHS CREEK          8750    16.1    12.9   125     19.3    19.4    99 
 COLD SPRINGS             9630     9.8     6.8   144     14.8    13.1   113 
 DEER PARK                9700      -M      -M      *    24.6      -M      *
 HOBBS PARK              10100    19.2    18.0   107     18.2    17.3   105 
 LITTLE WARM              9620    10.7    10.4   103     15.9    16.3    98 
 SOUTH PASS               9040    15.9    18.1    88     21.1    20.6   102 
 ST. LAWRENCE ALT         8620     9.7     5.4   180     12.9    12.5   103 
 TOGWOTEE PASS            9580    25.0    28.3    88     26.7    31.9    84 
 TOWNSEND CREEK           8700    11.3     9.5   119     17.1    15.5   110 
                                                -----                  -----
                Basin wide percent of average    108                    100 


BIGHORN BASIN

 BALD MTN.                9375    22.2    24.1    92     20.4    20.8    98 
 BEAR TRAP MEADOW         7900     3.0     4.2    71     11.7    10.6   110 
 BLACKWATER               9780    21.9    25.7    85     20.5    20.6   100 
 BONE SPRINGS DIV         9350    20.3    18.4   110     19.9    18.1   110 
 EVENING STAR             9200    22.6    30.8    73     27.1    25.9   105 
 GRAVE SPRINGS            8550    11.7      -M      *    13.9    12.4   112 
 KIRWIN                   9550    12.8    11.7   109     15.9    13.3   120 
 MARQUETTE                8760    14.2     8.6   165     16.5    13.5   122 
 MIDDLE POWDER            7760    12.1    14.8    82     13.4    14.8    91 
 OWL CREEK                8975     6.5     3.4   191      9.8     8.1   121 
 POWDER RIVER PASS        9480    11.9    10.5   113     16.1    14.7   110 
 SHELL CREEK              9580    15.8    17.0    93     13.8    15.9    87 
 SYLVAN LAKE              8420    16.3    23.8    68     22.6    22.3   101 
 SYLVAN ROAD              8120     5.4     7.9    68     15.2    18.6    82 
 TIMBER CREEK             7950     8.2     6.0   137     12.7    10.0   127 
 YOUNTS PEAK              8350    15.6    18.3    85     16.8    19.3    87 
                                                -----                  -----
                Basin wide percent of average     93                    103 


SHOSHONE RIVER

 BLACKWATER               9780    21.9    25.7    85     20.5    20.6   100 
 EVENING STAR             9200    22.6    30.8    73     27.1    25.9   105 
 KIRWIN                   9550    12.8    11.7   109     15.9    13.3   120 
 MARQUETTE                8760    14.2     8.6   165     16.5    13.5   122 
 SYLVAN LAKE              8420    16.3    23.8    68     22.6    22.3   101 
 SYLVAN ROAD              8120     5.4     7.9    68     15.2    18.6    82 
 YOUNTS PEAK              8350    15.6    18.3    85     16.8    19.3    87 
                                                -----                  -----
                Basin wide percent of average     86                    101 


POWDER-TONGUE

 BEAR TRAP MEADOW         7900     3.0     4.2    71     11.7    10.6   110 
 BONE SPRINGS DIV         9350    20.3    18.4   110     19.9    18.1   110 
 BURGESS JUNCTION         7880    12.1    13.5    90     15.1    14.4   105 
 CLOUD PEAK RESERVOIR     9860    17.1    17.7    97     19.8    17.1   116 
 DOME LAKE                8880      -M    15.0      *    16.4    16.4   100 
 GRAVE SPRINGS            8550    11.7      -M      *    13.9    12.4   112 
 HANSEN SAWMILL           8760     7.5     6.9   109     13.6    10.3   132 
 MIDDLE POWDER            7760    12.1    14.8    82     13.4    14.8    91 
 POWDER RIVER PASS        9480    11.9    10.5   113     16.1    14.7   110 
 SUCKER CREEK             8880    12.5    13.8    91     16.9    16.5   102 
 TIE CREEK                6870     5.6      -M      *    16.3    13.8   118 
                                                -----                  -----
                Basin wide percent of average     97                    109 


BELLE FOURCHE

 BLIND PARK               6890     1.0     9.6    10     13.9    13.8   101 
 NORTH RAPID CREEK        6130     3.7      -M      *    11.8      -M      *
 WARREN PEAK              6520     7.7     9.6    80     12.5    10.3   121 
                                                -----                  -----
                Basin wide percent of average     45                    110 


UPPER N. PLATTE RIVER

 COLUMBINE                9400    13.6    22.1    62     25.5    28.1    91 
 DIVIDE PEAK              8800    16.5    19.3    85     22.4    27.3    82 
 ELK RIVER                8700    11.5    16.2    71     22.7    22.1   103 
 JOE WRIGHT              10120    23.2    24.7    94     27.3    30.3    90 
 NORTH FRENCH CREEK      10100    32.6    29.4   111     32.6    28.0   116 
 OLD BATTLE              10000    35.1    38.2    92     38.9    35.7   109 
 SOUTH BRUSH CREEK        8400     3.0    10.6    28     14.4    20.6    70 
 TOWER                   10500    53.6    51.1   105     45.0    43.2   104 
 WEBBER SPRINGS           9200    19.2    26.0    74     28.6    30.6    93 
 WILLOW CREEK PASS        9540     9.4    13.5    70      9.6    15.4    62 
                                                -----                  -----
                Basin wide percent of average     87                     95 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    24.4    28.9    84     24.7    23.8   104 
 CASPER MTN.              7900    10.2    17.8    57     15.0    18.8    80 
 DEADMAN HILL            10220    16.9    19.1    88     17.1    21.1    81 
 DEER PARK                9700      -M      -M      *    24.6      -M      *
 LAPRELE CREEK            8320     3.3     6.3    52     12.7    14.7    86 
 RENO HILL                8400     9.6    13.4    72     13.6    22.4    61 
 ROACH                    9700    14.8    18.1    82     19.5    25.8    76 
 SAND LAKE               10080    30.6    37.2    82     27.3    24.8   110 
 SOUTH PASS               9040    15.9    18.1    88     21.1    20.6   102 
 WINDY PEAK               7840     3.4     7.9    43     10.7    12.2    88 
                                                -----                  -----
                Basin wide percent of average     77                     88 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440     3.3     4.8    69     17.6    18.5    95 
 DIVIDE PEAK              8800    16.5    19.3    85     22.4    27.3    82 
 OLD BATTLE              10000    35.1    38.2    92     38.9    35.7   109 
 SANDSTONE RS             8150     7.0     9.8    71     21.5    23.0    93 
 WHISKEY PARK             8950    28.7    29.6    97     31.1    34.0    91 
                                                -----                  -----
                Basin wide percent of average     89                     95 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100    11.9    13.9    86     14.0    18.5    76 
 BLIND BULL SUM           8650    23.7    22.7   104     20.9    26.9    78 
 EAST RIM DIVIDE          7930    12.3    14.8    83     13.3    17.3    77 
 ELKHART PARK G.S.        9400    11.7    14.0    84     15.4    18.2    85 
 GROS VENTRE SUMMIT       8775    11.7    13.9    84     14.9    18.1    82 
 KENDALL R.S.             7740     8.6    10.6    81     16.7    17.6    95 
 LOOMIS PARK              8240      -M    15.1      *    19.1    21.4    89 
 NEW FORK LAKE            8340     7.4     9.1    81     12.7    16.4    77 
 SNIDER BASIN             8250    11.9    13.0    92     14.1    17.2    82 
 SPRING CREEK DIVIDE      9000    22.1    29.6    75     24.2    30.8    79 
 TRIPLE PEAK              8500    17.6    25.0    70     24.2    35.0    69 
                                                -----                  -----
                Basin wide percent of average     83                     80 


LOWER GREEN RIVER

 HAMS FORK                7840     4.4     5.7    77     13.1    15.2    86 
 HEWINTA                  9500     9.1     5.3   172     17.3    16.3   106 
 HICKERSON PARK           9150    11.6     2.9   400     15.5    12.3   126 
 HOLE-IN-ROCK             9150     8.4     2.3   365     13.4    12.3   109 
 INDIAN CREEK             9425    23.9    28.9    83     21.9    29.2    75 
 KELLEY R.S.              8180    12.7    15.0    85     18.4    21.3    86 
 STEEL CREEK PARK        10100    20.7    18.9   110     21.7    16.1   135 
                                                -----                  -----
                Basin wide percent of average    115                     99 


UPPER BEAR RIVER

 BUG LAKE                 7950    17.7    16.0   111     23.5    22.6   104 
 HAYDEN FORK              9400    11.0     6.6   167     23.7    23.0   103 
 KELLEY R.S.              8180    12.7    15.0    85     18.4    21.3    86 
 LILY LAKE                9050    12.2     8.7   140     20.7    18.0   115 
 MONTE CRISTO             8960    28.1    26.2   107     29.5    30.3    97 
 SALT RIVER SUMMIT        7600    11.3    10.8   105     20.3    19.2   106 
 TRIAL LAKE               9960    23.9    24.0   100     26.4    28.3    93 
                                                -----                  -----
                Basin wide percent of average    109                    100 

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


-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.