Wyoming Snow Precipitation Update
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 MONDAY: APRIL 21 , 1997
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 29.5 14.0 211 37.5 24.4 154
COTTONWOOD CREEK 7600 30.6 22.1 138 35.1 27.4 128
GRANITE CREEK 6770 26.9 16.0 168 34.3 25.9 132
GRASSY LAKE 7265 48.8 36.3 134 58.1 40.6 143
GROS VENTRE SUMMIT 8775 23.2 15.2 153 22.3 17.5 127
LEWIS LAKE DIVIDE 7860 53.3 35.9 148 60.2 41.3 146
PHILLIPS BENCH 8200 40.7 30.4 134 48.4 32.6 148
SALT RIVER SUMMIT 7600 20.9 12.7 165 25.0 18.6 134
SNAKE RIVER STATION 6920 26.7 17.8 150 38.8 28.5 136
SPRING CREEK DIVIDE 9000 39.2 29.5 133 34.4 29.9 115
THUMB DIVIDE 7980 32.2 16.5 195 35.2 22.8 154
TOGWOTEE PASS 9580 36.2 27.5 132 36.5 30.9 118
TWO OCEAN PLATEAU 9360 48.3 27.0 179 -M 33.6 *
WILLOW CREEK 8450 40.0 31.8 126 46.6 35.1 133
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Basin wide percent of average 149 136
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 37.3 25.7 145 32.1 20.2 159
BLACK BEAR 7950 -M 40.1 * -M 44.8 *
CANYON 7940 23.4 12.5 187 -M 15.7 *
FISHER CREEK 9100 58.8 38.2 154 -M 40.5 *
MADISON PLATEAU 7750 46.7 24.9 188 44.3 28.8 154
NORTHEAST ENTRANCE 7350 10.5 7.8 135 21.2 13.2 161
PARKER PEAK 9400 34.0 23.4 145 -M 17.4 *
SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164
THUMB DIVIDE 7980 32.2 16.5 195 35.2 22.8 154
TWO OCEAN PLATEAU 9360 48.3 27.0 179 -M 33.6 *
WHISKEY CREEK 6800 25.3 17.1 148 33.4 24.0 139
WHITE MILL 8700 -M 26.0 * -M 31.3 *
WOLVERINE 7650 13.4 10.4 129 17.0 14.4 118
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Basin wide percent of average 159 151
WIND RIVER
BURROUGHS CREEK 8750 24.3 14.4 169 27.5 18.5 149
CHRISTINA LAKE 9980 21.1 17.2 123 24.8 19.0 131
COLD SPRINGS 9630 8.8 8.0 110 13.6 12.3 111
HOBBS PARK 10100 18.2 17.1 106 15.8 16.3 97
LITTLE WARM 9620 18.3 12.3 149 21.6 15.3 141
SOUTH PASS 9040 25.5 17.8 143 26.3 19.4 136
ST. LAWRENCE ALT 8620 9.0 6.5 138 12.8 11.7 109
TOGWOTEE PASS 9580 36.2 27.5 132 36.5 30.9 118
TOWNSEND CREEK 8700 10.5 10.1 104 13.9 14.5 96
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Basin wide percent of average 131 122
BIGHORN BASIN
BALD MTN. 9375 24.3 23.0 106 20.6 19.7 105
BEAR TRAP MEADOW 7900 6.8 5.9 115 11.1 9.8 113
BLACKWATER 9780 40.8 25.1 163 31.5 19.8 159
BONE SPRINGS DIV 9350 20.2 18.2 111 19.5 17.1 114
EVENING STAR 9200 42.9 29.8 144 42.6 24.8 172
GRAVE SPRINGS 8550 12.9 -M * 13.0 11.5 113
KIRWIN 9550 16.2 11.3 143 17.6 12.5 141
LOST CREEK 8080 18.7 15.4 121 18.0 13.9 129
MARQUETTE 8760 12.8 8.7 147 13.6 12.2 111
MIDDLE POWDER 7760 18.5 14.1 131 16.6 13.8 120
OWL CREEK 8975 7.0 4.2 167 7.3 7.5 97
POWDER RIVER PASS 9480 -M 11.2 * 15.4 13.6 113
SHELL CREEK 9580 19.5 16.5 118 16.8 15.0 112
SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164
SYLVAN ROAD 8120 19.4 9.7 200 28.6 17.8 161
TIMBER CREEK 7950 7.0 6.4 109 9.1 9.0 101
YOUNTS PEAK 8350 24.3 18.3 133 -M 18.4 *
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Basin wide percent of average 135 132
SHOSHONE RIVER
BLACKWATER 9780 40.8 25.1 163 31.5 19.8 159
EVENING STAR 9200 42.9 29.8 144 42.6 24.8 172
KIRWIN 9550 16.2 11.3 143 17.6 12.5 141
MARQUETTE 8760 12.8 8.7 147 13.6 12.2 111
SYLVAN LAKE 8420 32.5 23.9 136 34.9 21.3 164
SYLVAN ROAD 8120 19.4 9.7 200 28.6 17.8 161
YOUNTS PEAK 8350 24.3 18.3 133 -M 18.4 *
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Basin wide percent of average 149 156
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.8 5.9 115 11.1 9.8 113
BONE SPRINGS DIV 9350 20.2 18.2 111 19.5 17.1 114
BURGESS JUNCTION 7880 15.9 13.1 121 15.9 13.4 119
CLOUD PEAK RESERVOIR 9860 19.7 17.1 115 17.5 15.8 111
DOME LAKE 8880 15.3 14.9 103 16.8 15.3 110
GRAVE SPRINGS 8550 12.9 -M * 13.0 11.5 113
HANSEN SAWMILL 8760 6.2 7.3 85 9.8 9.5 103
LOST CREEK 8080 18.7 15.4 121 18.0 13.9 129
MIDDLE POWDER 7760 18.5 14.1 131 16.6 13.8 120
POWDER RIVER PASS 9480 -M 11.2 * 15.4 13.6 113
SUCKER CREEK 8880 17.6 13.5 130 18.3 15.4 119
TIE CREEK 6870 7.2 -M * 14.9 12.9 116
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Basin wide percent of average 116 115
BELLE FOURCHE
BLIND PARK 6890 8.6 10.8 80 17.3 12.5 138
NORTH RAPID CREEK 6130 11.1 -M * 15.7 -M *
WARREN PEAK 6520 20.6 10.8 191 -M 9.5 *
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Basin wide percent of average 135 138*
UPPER N. PLATTE RIVER
COLUMBINE 9400 29.2 23.5 124 34.8 26.9 129
DIVIDE PEAK 8800 28.8 20.9 138 27.3 25.8 106
ELK RIVER 8700 27.9 18.8 148 27.8 21.1 132
JOE WRIGHT 10120 29.9 24.4 123 32.8 28.5 115
NORTH FRENCH CREEK 10100 37.7 28.7 131 31.7 26.5 120
OLD BATTLE 10000 43.7 36.7 119 41.4 33.9 122
SOUTH BRUSH CREEK 8400 12.6 12.1 104 19.2 19.2 100
TOWER 10500 58.0 49.8 116 53.4 40.9 131
WEBBER SPRINGS 9200 31.4 27.6 114 38.8 28.8 135
WILLOW CREEK PASS 9540 22.4 13.5 166 18.2 14.5 126
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Basin wide percent of average 126 122
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 39.1 29.0 135 30.9 22.3 139
CASPER MTN. 7900 24.2 18.6 130 23.1 17.2 134
CHRISTINA LAKE 9980 21.1 17.2 123 24.8 19.0 131
DEADMAN HILL 10220 18.6 18.3 102 21.0 19.6 107
LAPRELE CREEK 8320 14.6 8.6 170 16.3 13.7 119
RENO HILL 8400 24.2 14.7 165 23.3 21.3 109
ROACH 9700 26.1 18.1 144 24.7 24.2 102
SAND LAKE 10080 41.3 36.3 114 32.6 23.3 140
SOUTH PASS 9040 25.5 17.8 143 26.3 19.4 136
WINDY PEAK 7840 9.2 8.8 105 13.3 11.3 118
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Basin wide percent of average 130 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.5 8.6 122 30.2 17.4 174
DIVIDE PEAK 8800 28.8 20.9 138 27.3 25.8 106
OLD BATTLE 10000 43.7 36.7 119 41.4 33.9 122
SANDSTONE RS 8150 15.4 13.2 117 23.4 21.5 109
WHISKEY PARK 8950 41.3 30.3 136 36.3 32.1 113
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Basin wide percent of average 127 121
UPPER GREEN RIVER
BIG SANDY OPENING 9100 19.4 14.8 131 18.2 17.9 102
BLIND BULL SUM 8650 42.9 27.9 154 34.6 26.1 133
EAST RIM DIVIDE 7930 17.2 14.9 115 18.0 16.7 108
ELKHART PARK G.S. 9400 18.9 14.6 129 19.5 17.6 111
GROS VENTRE SUMMIT 8775 23.2 15.2 153 22.3 17.5 127
KENDALL R.S. 7740 21.7 12.2 178 24.5 17.0 144
LOOMIS PARK 8240 -M 16.2 * 28.4 20.7 137
NEW FORK LAKE 8340 14.0 10.1 139 14.0 15.9 88
SNIDER BASIN 8250 21.9 14.6 150 20.4 16.6 123
SPRING CREEK DIVIDE 9000 39.2 29.5 133 34.4 29.9 115
TRIPLE PEAK 8500 33.8 26.2 129 40.3 33.9 119
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Basin wide percent of average 140 119
LOWER GREEN RIVER
HAMS FORK 7840 13.5 5.7 237 16.0 14.7 109
HEWINTA 9500 9.1 7.6 120 15.2 15.2 100
HICKERSON PARK 9150 11.0 5.2 212 11.4 11.4 100
HOLE-IN-ROCK 9150 9.0 4.7 191 11.8 11.4 104
INDIAN CREEK 9425 41.1 29.8 138 33.1 28.3 117
KELLEY R.S. 8180 23.1 16.6 139 31.4 20.6 152
STEEL CREEK PARK 10100 17.1 18.3 93 17.4 15.0 116
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Basin wide percent of average 141 117
UPPER BEAR RIVER
BUG LAKE 7950 31.4 18.5 170 30.6 21.6 142
HAYDEN FORK 9400 14.3 9.2 155 26.5 21.7 122
KELLEY R.S. 8180 23.1 16.6 139 31.4 20.6 152
LILY LAKE 9050 15.3 11.3 135 20.6 16.9 122
MONTE CRISTO 8960 36.4 28.1 130 34.5 28.8 120
SALT RIVER SUMMIT 7600 20.9 12.7 165 25.0 18.6 134
TRIAL LAKE 9960 34.4 25.2 137 35.5 26.9 132
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Basin wide percent of average 145 132
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-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.
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-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 Index (%) 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.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.