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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 TUESDAY: APRIL 20 , 1999 
-----------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT   TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %  
                                Current  Average  Avg  Current  Average  Avg
-----------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    20.9    14.5   145     28.4    24.4   117 
 COTTONWOOD CREEK         7600    24.2    22.4   109     29.4    27.4   108 
 GRANITE CREEK            6770    21.0    16.4   129     24.0    25.9    94 
 GRASSY LAKE              7265    42.2    36.7   116     42.7    40.7   105 
 GROS VENTRE SUMMIT       8775    16.5    15.5   108     16.7    17.5    96 
 LEWIS LAKE DIVIDE        7860    40.0    36.2   111     41.3    41.3   101 
 PHILLIPS BENCH           8200    36.0    30.5   119     33.8    32.7   104 
 SALT RIVER SUMMIT        7600    15.2    13.0   118     19.4    18.7   105 
 SNAKE RIVER STATION      6920    19.5    18.0   109     26.7    28.5    94 
 SPRING CREEK DIVIDE      9000    31.7    29.5   108     30.2    29.9   101 
 THUMB DIVIDE             7980    23.2    16.7   139     23.5    22.9   104 
 TOGWOTEE PASS            9580      -M    27.5      *    30.7    30.9   100 
 TWO OCEAN PLATEAU        9360    39.2    27.0   145     33.0    33.5    99 
 WILLOW CREEK             8450    33.3    31.9   105     39.9    35.0   115 
                                                -----                  -----
                Basin wide percent of average    118                    103 


UPPER YELLOWSTONE-MADISON

 BEARTOOTH LAKE           9275    27.2    25.7   106     24.5    20.2   122 
 BLACK BEAR               7950    46.5    40.2   116       -M    44.7      *
 CANYON                   7940    17.7    12.7   139     20.4    15.7   130 
 FISHER CREEK             9100    37.2    38.3    98     38.3    40.4    95 
 MADISON PLATEAU          7750      -M    25.2      *    33.7    28.9   117 
 NORTHEAST ENTRANCE       7350    10.5     8.1   130     14.7    13.2   112 
 PARKER PEAK              9400    24.9    23.4   107       -M    17.4      *
 SYLVAN LAKE              8420    26.9    23.9   113     29.2    21.4   138 
 THUMB DIVIDE             7980    23.2    16.7   139     23.5    22.9   104 
 TWO OCEAN PLATEAU        9360    39.2    27.0   145     33.0    33.5    99 
 WHISKEY CREEK            6800    21.7    17.4   125     25.5    24.0   107 
 WHITE MILL               8700    28.7    26.0   111     25.9    31.2    84 
 WOLVERINE                7650    12.5    10.7   116     13.5    14.5    94 
                                                -----                  -----
                Basin wide percent of average    117                    107 


WIND RIVER

 BURROUGHS CREEK          8750    17.0    14.6   117     19.2    18.5   104 
 COLD SPRINGS             9630     9.2     8.2   113     13.5    12.2   110 
 DEER PARK                9700    17.4      -M      *    24.5      -M      *
 HOBBS PARK              10100    19.7    17.0   116     18.2    16.2   113 
 LITTLE WARM              9620    15.5    12.6   124     17.5    15.4   115 
 SOUTH PASS               9040      -M    17.9      *    21.5    19.4   111 
 ST. LAWRENCE ALT         8620     8.1     6.6   123     12.0    11.7   102 
 TOGWOTEE PASS            9580      -M    27.5      *    30.7    30.9   100 
 TOWNSEND CREEK           8700    11.5    10.2   112     15.6    14.5   108 
                                                -----                  -----
                Basin wide percent of average    117                    107 


BIGHORN BASIN

 BALD MTN.                9375    21.7    22.9    95     20.2    19.7   103 
 BEAR TRAP MEADOW         7900     1.5     6.1    25     10.9     9.9   111 
 BLACKWATER               9780    32.3    25.2   129     26.7    19.7   136 
 BONE SPRINGS DIV         9350    19.2    18.2   106     19.4    17.2   114 
 EVENING STAR             9200    34.5    29.9   116     35.9    24.9   145 
 GRAVE SPRINGS            8550    10.5    11.0    95     13.6    11.5   120 
 KIRWIN                   9550    13.7    11.4   122     15.5    12.5   125 
 MARQUETTE                8760    10.7     8.7   123     11.9    12.1    98 
 MIDDLE POWDER            7760    16.5    14.0   118     19.7    13.9   143 
 OWL CREEK                8975     6.8     4.3   156      8.0     7.5   106 
 POWDER RIVER PASS        9480    12.4    11.4   109     16.7    13.6   123 
 SHELL CREEK              9580    17.0    16.5   104     16.7    15.0   113 
 SYLVAN LAKE              8420    26.9    23.9   113     29.2    21.4   138 
 SYLVAN ROAD              8120    16.0    10.0   162     20.4    17.9   115 
 TIMBER CREEK             7950     6.0     6.5    91      8.7     9.0    97 
 YOUNTS PEAK              8350    22.2    18.4   121     20.2    18.4   110 
                                                -----                  -----
                Basin wide percent of average    113                    121 


SHOSHONE RIVER

 BLACKWATER               9780    32.3    25.2   129     26.7    19.7   136 
 EVENING STAR             9200    34.5    29.9   116     35.9    24.9   145 
 KIRWIN                   9550    13.7    11.4   122     15.5    12.5   125 
 MARQUETTE                8760    10.7     8.7   123     11.9    12.1    98 
 SYLVAN LAKE              8420    26.9    23.9   113     29.2    21.4   138 
 SYLVAN ROAD              8120    16.0    10.0   162     20.4    17.9   115 
 YOUNTS PEAK              8350    22.2    18.4   121     20.2    18.4   110 
                                                -----                  -----
                Basin wide percent of average    123                    127 


POWDER-TONGUE

 BEAR TRAP MEADOW         7900     1.5     6.1    25     10.9     9.9   111 
 BIG GOOSE                7990     9.1      -M      *    13.6      -M      *
 BONE SPRINGS DIV         9350    19.2    18.2   106     19.4    17.2   114 
 BURGESS JUNCTION         7880    11.5    13.1    88     13.5    13.5   100 
 CLOUD PEAK RESERVOIR     9860    19.4    17.2   114     18.2    15.9   116 
 DOME LAKE                8880      -M    15.0      *    13.5    15.4    89 
 GRAVE SPRINGS            8550    10.5    11.0    95     13.6    11.5   120 
 HANSEN SAWMILL           8760     4.1     7.5    56     10.1     9.5   107 
 MIDDLE POWDER            7760    16.5    14.0   118     19.7    13.9   143 
 POWDER RIVER PASS        9480    12.4    11.4   109     16.7    13.6   123 
 SUCKER CREEK             8880    13.0    13.5    96     16.5    15.4   108 
 TIE CREEK                6870      -M      -M      *      -M    12.9      *
                                                -----                  -----
                Basin wide percent of average     97                    113 


BELLE FOURCHE

 BLIND PARK               6890     5.0    11.0    46     17.2    12.5   137 
 NORTH RAPID CREEK        6130     5.8      -M      *    15.0      -M      *
 WARREN PEAK              6520    11.5    11.0   105     11.6     9.5   123 
                                                -----                  -----
                Basin wide percent of average     75                    131 


UPPER N. PLATTE RIVER

 COLUMBINE                9400    18.0    23.7    76     24.2    26.9    90 
 DIVIDE PEAK              8800    22.0    21.2   105     27.4    25.7   107 
 ELK RIVER                8700      -M    19.2      *    24.2    21.2   115 
 JOE WRIGHT              10120    21.5    24.4    89     28.5    28.4   101 
 NORTH FRENCH CREEK      10100    34.2    28.7   120     32.5    26.4   124 
 OLD BATTLE              10000    32.8    36.7    90     39.4    33.8   117 
 SOUTH BRUSH CREEK        8400    10.1    12.4    83     21.2    19.2   111 
 TOWER                   10500    48.3    49.8    97     41.3    40.8   102 
 WEBBER SPRINGS           9200    20.7    27.9    75     29.2    28.7   102 
 WILLOW CREEK PASS        9540    12.9    13.5    95     13.4    14.5    93 
                                                -----                  -----
                Basin wide percent of average     93                    106 


LOWER N. PLATTE - SWEETWATER - LARAMIE

 BROOKLYN LAKE           10240    15.9    29.0    55     24.5    22.2   111 
 CASPER MTN.              7900    14.9    18.7    80     19.9    17.2   117 
 DEADMAN HILL            10220    18.0    18.4    99     19.0    19.5    98 
 DEER PARK                9700    17.4      -M      *    24.5      -M      *
 LAPRELE CREEK            8320      -M     9.0      *    17.4    13.7   127 
 RENO HILL                8400    17.2    15.0   116     22.9    21.4   108 
 ROACH                    9700    17.9    18.2    98     22.7    24.2    94 
 SAND LAKE               10080    39.9    36.3   111     32.2    23.2   139 
 SOUTH PASS               9040      -M    17.9      *    21.5    19.4   111 
 WINDY PEAK               7840     7.3     9.0    81     15.0    11.4   133 
                                                -----                  -----
                Basin wide percent of average     91                    114 


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440     8.5     9.0    94     19.2    17.4   110 
 DIVIDE PEAK              8800    22.0    21.2   105     27.4    25.7   107 
 OLD BATTLE              10000    32.8    36.7    90     39.4    33.8   117 
 SANDSTONE RS             8150    12.4    13.6    91     22.4    21.4   105 
 WHISKEY PARK             8950    29.4    30.4    97     32.3    31.9   101 
                                                -----                  -----
                Basin wide percent of average     95                    108 


UPPER GREEN RIVER

 BIG SANDY OPENING        9100    15.9    15.0   106     16.2    17.9    91 
 BLIND BULL SUM           8650    30.4    28.5   107     23.4    26.2    90 
 EAST RIM DIVIDE          7930    14.1    15.0    95     15.0    16.7    90 
 ELKHART PARK G.S.        9400    14.7    14.7   100     15.7    17.7    90 
 GROS VENTRE SUMMIT       8775    16.5    15.5   108     16.7    17.5    96 
 KENDALL R.S.             7740    14.5    12.5   117     17.5    17.0   103 
 LOOMIS PARK              8240      -M    16.4      *    21.4    20.7   103 
 NEW FORK LAKE            8340    12.4    10.4   120     13.0    16.0    82 
 SNIDER BASIN             8250    17.7    14.9   120     18.9    16.7   114 
 SPRING CREEK DIVIDE      9000    31.7    29.5   108     30.2    29.9   101 
 TRIPLE PEAK              8500    27.7    26.4   105     32.0    33.8    95 
                                                -----                  -----
                Basin wide percent of average    108                     96 


LOWER GREEN RIVER

 HAMS FORK                7840    11.5     5.8   197     12.5    14.7    86 
 HEWINTA                  9500    10.1     8.0   128     15.5    15.2   102 
 HICKERSON PARK           9150     3.9     5.5    71     10.5    11.4    93 
 HOLE-IN-ROCK             9150     6.6     5.0   133     11.0    11.4    98 
 INDIAN CREEK             9425    32.5    30.0   109     27.0    28.4    96 
 KELLEY R.S.              8180    16.2    16.9    96     19.9    20.7    97 
 STEEL CREEK PARK        10100    15.9    18.4    87     18.0    15.0   121 
                                                -----                  -----
                Basin wide percent of average    108                     99 


UPPER BEAR RIVER

 BUG LAKE                 7950    22.5    18.9   120     21.9    21.7   101 
 HAYDEN FORK              9400    11.7     9.5   124     22.2    21.7   103 
 KELLEY R.S.              8180    16.2    16.9    96     19.9    20.7    97 
 LILY LAKE                9050    11.2    11.6    97     19.0    16.9   113 
 MONTE CRISTO             8960    27.4    28.4    97     28.2    28.7    98 
 SALT RIVER SUMMIT        7600    15.2    13.0   118     19.4    18.7   105 
 TRIAL LAKE               9960    19.9    25.4    79     23.4    26.9    87 
                                                -----                  -----
                Basin wide percent of average    101                    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.