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Water Resources Data System
Dept 3943
1000 E. University Ave.
Laramie, WY 82071

wrds@uwyo.edu
Ph (307) 766-6651
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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 SATURDAY: APRIL 20 , 2013
------------------------------------------------------------------------------
BASIN                    ELEV.  SNOW WATER EQUIVALENT    TOTAL PRECIPITATION
 Data Site Name          (Ft)                      %                      %
                                Current  Median  Median  Current  Average  Avg
------------------------------------------------------------------------------

WYOMING


SNAKE RIVER  

 BASE CAMP                7030    15.3    11.9   129     21.0    21.7    97
 BLACK BEAR               8170    38.6    36.9   105     36.8    39.8    92
 BLIND BULL SUM           8650    21.7    24.0    90     15.7    20.2    78
 COTTONWOOD CREEK         7670    18.1    18.6    97     25.2    25.8    98
 EAST RIM DIVIDE          7930     7.9     9.5    83      9.4    12.2    77
 GRAND TARGHEE            9260    40.2    42.0    96     30.0    32.6    92
 GRANITE CREEK            6770    11.9    10.8   110     16.3    20.3    80
 GRASSY LAKE              7265    29.0    31.3    93     33.5    37.3    90
 GROS VENTRE SUMMIT       8750    10.1    13.2    77     12.5    13.7    91
 GUNSIGHT PASS            9820    11.7    13.6    86     12.9    14.9    87
 LEWIS LAKE DIVIDE        7850    31.0    30.4   102     33.7    36.8    92
 PHILLIPS BENCH           8200    24.0    25.6    94     25.7    29.2    88
 SALT RIVER SUMMIT        7760     9.9     9.7   102     15.5    17.4    89
 SNAKE RIVER STATION      6920    13.7    11.3   121     22.7    23.5    97
 SPRING CREEK DIVIDE      9000    25.0    23.5   106     23.8    24.7    96
 THUMB DIVIDE             7980    16.1    14.5   111     18.3    19.7    93
 TOGWOTEE PASS            9580    22.6    23.8    95     23.4    25.7    91
 TWO OCEAN PLATEAU        9240    30.4    28.1   108     26.2    28.5    92
 WILLOW CREEK             8380    27.3    26.8   102     33.5    35.3    95
 YOUNTS PEAK              8350    13.2    15.1    87     12.4    16.6    75
                                                -----                  -----
                Basin wide percent                99                     90


MADISON-GALLATIN

 BLACK BEAR               8170    38.6    36.9   105     36.8    39.8    92
 CANYON                   7870    12.2    12.2   100     13.6    17.0    80
 MADISON PLATEAU          7750    22.1    22.9    97     25.5    27.5    93
 WEST YELLOWSTONE         6700     4.8     7.4    65     14.2    15.1    94
 WHISKEY CREEK            6800    10.4    15.3    68     18.9    21.2    89
                                                -----                  -----
                Basin wide percent                93                     90


YELLOWSTONE

 BEARTOOTH LAKE           9360    18.8    23.4    80     19.0    20.8    91
 BURNT MTN                5880      .8      .0      *    10.5    14.2    74
 CANYON                   7870    12.2    12.2   100     13.6    17.0    80
 COLE CREEK               7850    13.0    16.3    80      9.9    14.5    68
 EVENING STAR             9200    25.9    24.8   104     29.2    28.7   102
 FISHER CREEK             9100    30.8    32.4    95     32.1    33.3    96
 NORTHEAST ENTRANCE       7350     5.6     6.7    84     11.9    13.0    92
 PARKER PEAK              9400    24.2    20.9   116     22.1    18.7   118
 SYLVAN LAKE              8420    19.0    20.4    93     24.9    23.6   106
 THUMB DIVIDE             7980    16.1    14.5   111     18.3    19.7    93
 TWO OCEAN PLATEAU        9240    30.4    28.1   108     26.2    28.5    92
 WHITE MILL               8700    24.0    23.7   101     22.8    24.9    92
 WOLVERINE                7650     5.7     7.2    79     11.1    12.8    87
                                                -----                  -----
                Basin wide percent                98                     93


WIND RIVER

 BURROUGHS CREEK          8750    12.6    13.1    96     11.6    16.8    69
 CASTLE CREEK             8400     2.8      -M      *     8.3      -M      *
 COLD SPRINGS             9630     4.8     4.6   104      9.1    10.9    83
 DEER PARK                9700    13.5    16.3    83     15.4    21.5    72
 HOBBS PARK              10100    13.1    14.8    89     12.5    14.8    84
 KIRWIN                   9550    10.1    10.0   101     11.8    12.4    95
 LITTLE WARM              9370    10.0    10.1    99     12.5    13.9    90
 OWL CREEK                8975     6.0     4.0   150      6.7     6.9    97
 SOUTH PASS               9040    12.0    15.5    77     11.4    18.6    61
 ST. LAWRENCE ALT         8620     3.2     5.3    60      9.0     9.9    91
 TOGWOTEE PASS            9580    22.6    23.8    95     23.4    25.7    91
 TOWNSEND CREEK           8700     8.0     9.4    85     10.8    13.3    81
                                                -----                  -----
                Basin wide percent                91                     81


BIGHORN BASIN

 BALD MTN.                9380    16.2    19.8    82     11.3    18.2    62
 BEAR TRAP MEADOW         8200     8.5     3.2   266     10.4     9.4   111
 BONE SPRINGS DIV         9350    15.0    16.1    93     12.4    16.7    74
 GRAVE SPRINGS            8550     7.6     9.6    79      9.5    11.7    81
 KIRWIN                   9550    10.1    10.0   101     11.8    12.4    95
 MARQUETTE                8760     8.5      -M      *     9.9      -M      *
 MIDDLE POWDER            7760    13.3    12.5   106     15.0    12.8   117
 OWL CREEK                8975     6.0     4.0   150      6.7     6.9    97
 POWDER RIVER PASS        9480    12.1    10.2   119     14.4    13.7   105
 SHELL CREEK              9580    15.1    15.4    98     13.4    14.8    91
 TIMBER CREEK             7950     4.4     4.8    92      8.3     8.4    99
                                                -----                  -----
                Basin wide percent               103                     91


SHOSHONE RIVER

 BLACKWATER               9780    24.7    23.8   104     24.2    21.8   111
 EVENING STAR             9200    25.9    24.8   104     29.2    28.7   102
 MARQUETTE                8760     8.5      -M      *     9.9      -M      *
 SYLVAN ROAD              7120     5.7     9.8    58     16.6    17.6    94
 YOUNTS PEAK              8350    13.2    15.1    87     12.4    16.6    75
                                                -----                  -----
                Basin wide percent                95                     97


POWDER RIVER

 BEAR TRAP MEADOW         8200     8.5     3.2   266     10.4     9.4   111
 CLOUD PEAK RESERVOIR     9860    14.0    15.8    89     12.7    14.9    85
 GRAVE SPRINGS            8550     7.6     9.6    79      9.5    11.7    81
 HANSEN SAWMILL           8360     6.7     4.8   140      9.0     9.5    95
 MIDDLE POWDER            7760    13.3    12.5   106     15.0    12.8   117
 POWDER RIVER PASS        9480    12.1    10.2   119     14.4    13.7   105
 SOLDIER PARK             8720     5.3      -M      *     8.6      -M      *
                                                -----                  -----
                Basin wide percent               111                     99


TONGUE RIVER

 BIG GOOSE                7990     8.0     9.3    86      9.5    12.6    75
 BONE SPRINGS DIV         9350    15.0    16.1    93     12.4    16.7    74
 BURGESS JUNCTION         7880    11.1    12.5    89     10.6    13.4    79
 DOME LAKE                8880     9.7    11.8    82     10.3    14.9    69
 LITTLE GOOSE             8870     9.0      -M      *    12.5      -M      *
 SUCKER CREEK             8880    12.8    12.7   101     13.6    15.8    86
 TIE CREEK                6870     4.4     4.4   100     10.9    12.8    85
                                                -----                  -----
                Basin wide percent                91                     78


BELLE FOURCHE

 COLE CANYON              5910     4.2     2.0   210      9.2    10.4    88
                                                -----                  -----
                Basin wide percent               210                     88


CHEYENNE RIVER BASIN

 BLIND PARK               6890     6.1     4.1   149     13.2    13.1   101
 NORTH RAPID CREEK        6130     5.9     4.2   140     10.9    11.0    99
                                                -----                  -----
                Basin wide percent               145                    100


UPPER N. PLATTE

 ARAPAHO RIDGE           10960    22.1    21.4   103     22.1    24.3    91
 BLACKHALL MTN            9820    28.5      -M      *    29.1      -M      *
 COLUMBINE                9160    22.2    20.6   108     24.8    26.9    92
 DIVIDE PEAK              8880    15.5    18.9    82     20.6    22.8    90
 JOE WRIGHT              10120    20.8    22.2    94     28.4    27.7   103
 LAPRELE CREEK            8375     7.1     8.0    89     10.3    13.7    75
 MED BOW                 10500     9.9      -M      *    31.0      -M      *
 NORTH FRENCH CREEK      10130    26.1    32.0    82     24.9    28.6    87
 NEVER SUMMER            10280    20.2    20.7    98     15.3      -M      *
 OLD BATTLE              10000    29.1    32.7    89     30.6    37.0    83
 RAWAH                    9020    13.2     8.4   157     16.5    15.5   106
 SAGE CREEK BASIN         7850      -M     6.0      *    11.2    15.3    73
 SAND LAKE               10050    25.5    30.5    84     25.2    26.8    94
 SOUTH BRUSH CREEK        8440    10.7     9.8   109     14.1    16.5    85
 TOWER                   10500    36.1    48.0    75     26.1    42.1    62
 WEBBER SPRINGS           9250    21.8    22.0    99     24.4    28.4    86
 WILLOW CREEK PASS        9540    17.3    13.1   132     17.2    14.4   119
 ZIRKEL                   9340    25.0    22.7   110     29.8    29.7   100
                                                -----                  -----
                Basin wide percent                94                     88


SWEETWATER

 DEER PARK                9700    13.5    16.3    83     15.4    21.5    72
 LARSEN CREEK             9000     4.9      -M      *    11.7      -M      *
 SOUTH PASS               9040    12.0    15.5    77     11.4    18.6    61
                                                -----                  -----
                Basin wide percent                80                     67


LOWER N. PLATTE

 CASPER MTN.              7900    12.9    14.4    90     10.7    16.6    64
 LAPRELE CREEK            8375     7.1     8.0    89     10.3    13.7    75
 RENO HILL                8400    13.2    13.9    95     15.1    17.2    88
 WINDY PEAK               7900     6.4     6.6    97      9.4    11.6    81
                                                -----                  -----
                Basin wide percent                92                     77


LARAMIE RIVER

 BROOKLYN LAKE           10240    20.5    22.2    92     20.0    22.8    88
 CINNABAR PARK            9574    14.1    20.1    70     20.5    25.3    81
 CROW CREEK               8330     5.8      .7   829*    10.2    12.0    85
 DEADMAN HILL            10220    17.1    17.0   101     16.6    18.9    88
 RAWAH                    9020    13.2     8.4   157     16.5    15.5   106
 ROACH                    9700    16.1    16.6    97     18.1    20.6    88
                                                -----                  -----
                Basin wide percent               102                     89


S. PLATTE

 BLACK MOUNTAIN           8920    11.5      -M      *    13.3      -M      *
 CROW CREEK               8330     5.8      .7   829*    10.2    12.0    85
 DEADMAN HILL            10220    17.1    17.0   101     16.6    18.9    88
                                                -----                  -----
                Basin wide percent               129*                    87


LITTLE SNAKE RIVER

 BATTLE MOUNTAIN          7440     4.9     4.3   114     12.9    16.1    80
 DIVIDE PEAK              8880    15.5    18.9    82     20.6    22.8    90
 ELK RIVER                8700      -M    15.5      *      -M    21.3      *
 LITTLE SNAKE RIVER       8915    22.0    24.3    91     27.8    31.2    89
 OLD BATTLE              10000    29.1    32.7    89     30.6    37.0    83
 SAGE CREEK BASIN         7850      -M     6.0      *    11.2    15.3    73
 SANDSTONE RS             8150     9.4    10.1    93     13.8    19.5    71
 WHISKEY PARK             8950    26.2    25.9   101     28.1    29.6    95
                                                -----                  -----
                Basin wide percent                92                     85


UPPER GREEN RIVER

 BIG SANDY OPENING        9080    11.3    12.7    89     11.6    14.1    82
 BLIND BULL SUM           8650    21.7    24.0    90     15.7    20.2    78
 EAST RIM DIVIDE          7930     7.9     9.5    83      9.4    12.2    77
 ELKHART PARK G.S.        9400     9.6    11.9    81     10.6    14.0    76
 GROS VENTRE SUMMIT       8750    10.1    13.2    77     12.5    13.7    91
 GUNSIGHT PASS            9820    11.7    13.6    86     12.9    14.9    87
 KENDALL R.S.             7740     6.8     8.4    81     11.7    14.8    79
 LOOMIS PARK              8240    11.0    13.0    85     14.6    18.0    81
 NEW FORK LAKE            8340     6.8     8.8    77      7.4    11.3    65
 POCKET CREEK             9360     9.2      -M      *    11.1      -M      *
 SNIDER BASIN             8060     8.8    10.7    82     14.3    14.8    97
 SPRING CREEK DIVIDE      9000    25.0    23.5   106     23.8    24.7    96
 TRIPLE PEAK              8500    21.8    19.3   113     24.9    26.3    95
                                                -----                  -----
                Basin wide percent                90                     85


LOWER GREEN RIVER

 BLACKS FORK JCT          8870     8.5      -M      *    11.9      -M      *
 BUCK PASTURE             9700    15.3      -M      *    17.6      -M      *
 EF BLACKS FORK GS        9308    15.9      -M      *    12.1      -M      *
 HAMS FORK                7840     7.0     6.7   104     10.4    12.0    87
 HEWINTA                  9519    14.6     8.1   180     14.6    15.0    97
 HICKERSON PARK           9145     7.8     5.4   144     11.4    11.0   104
 HOLE-IN-ROCK             9150    10.2     5.9   173     12.6    10.5   120
 INDIAN CREEK             9425    23.1    23.3    99     19.9    23.5    85
 KELLEY R.S.              8180    12.7    12.7   100     14.8    18.9    78
 SPIRIT LK               10223    12.8      -M      *    16.9      -M      *
 STEEL CREEK PARK        10200    16.0    16.2    99     17.6    17.7    99
                                                -----                  -----
                Basin wide percent               117                     93


UPPER BEAR RIVER

 BEAR RIVER RS            8500     7.9      -M      *    13.1      -M      *
 BUG LAKE                 7950    14.2    17.2    83     17.9    20.4    88
 BURTS MILLER RANCH       8000     5.7      -M      *     8.6      -M      *
 CHALK CREEK #1           8993    21.8    24.6    89     23.7    26.7    89
 HAYDEN FORK              9212    13.8    11.8   117     19.1    22.4    85
 KELLEY R.S.              8180    12.7    12.7   100     14.8    18.9    78
 LILY LAKE                9156    12.5    10.6   118     14.8    18.3    81
 MONTE CRISTO             8960    23.2    27.5    84     24.1    27.3    88
 SALT RIVER SUMMIT        7760     9.9     9.7   102     15.5    17.4    89
                                                -----                  -----
                Basin wide percent                95                     86

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


 -M   = Missing data
  *   = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and

Total Precipitation values

If the Basin wide percent 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 Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median 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 comparison of conditions is 1981-2010.

Provisional data, subject to revision.