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 TUESDAY: APRIL 15 , 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 30.3 16.0 189 35.9 23.9 150
COTTONWOOD CREEK 7600 31.6 23.3 136 34.0 26.9 126
GRANITE CREEK 6770 29.1 17.8 163 33.4 25.3 132
GRASSY LAKE 7265 48.9 37.8 129 53.3 39.9 134
GROS VENTRE SUMMIT 8775 23.2 16.0 145 21.9 17.1 128
LEWIS LAKE DIVIDE 7860 52.9 36.8 144 45.9 40.5 113
PHILLIPS BENCH 8200 44.3 30.9 143 46.4 32.0 145
SALT RIVER SUMMIT 7600 22.2 13.8 161 24.6 18.2 135
SNAKE RIVER STATION 6920 28.2 18.6 152 37.6 28.0 134
SPRING CREEK DIVIDE 9000 37.9 29.4 129 33.7 29.4 115
THUMB DIVIDE 7980 32.1 17.4 184 34.0 22.4 152
TOGWOTEE PASS 9580 35.6 27.0 132 34.8 30.4 114
TWO OCEAN PLATEAU 9360 47.0 26.6 177 -M 32.9 *
WILLOW CREEK 8450 40.3 31.7 127 45.5 34.4 132
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Basin wide percent of average 147 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 36.7 25.5 144 31.5 19.6 161
BLACK BEAR 7950 -M 40.2 * -M 43.7 *
CANYON 7940 23.1 13.5 171 26.9 15.3 176
FISHER CREEK 9100 56.8 37.9 150 -M 39.5 *
MADISON PLATEAU 7750 42.8 25.6 167 43.0 28.2 152
NORTHEAST ENTRANCE 7350 12.8 9.0 142 19.7 12.8 154
PARKER PEAK 9400 33.0 23.2 142 -M 16.9 *
SYLVAN LAKE 8420 32.1 23.9 134 33.8 20.7 163
THUMB DIVIDE 7980 32.1 17.4 184 34.0 22.4 152
TWO OCEAN PLATEAU 9360 47.0 26.6 177 -M 32.9 *
WHISKEY CREEK 6800 25.2 18.2 138 32.1 23.5 137
WHITE MILL 8700 39.4 25.8 153 -M 30.5 *
WOLVERINE 7650 13.0 11.8 110 16.3 13.9 117
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Basin wide percent of average 152 152
WIND RIVER
BURROUGHS CREEK 8750 24.6 15.3 161 26.8 18.0 149
CHRISTINA LAKE 9980 20.7 16.7 124 24.0 18.3 131
COLD SPRINGS 9630 10.5 8.7 121 13.5 11.8 114
HOBBS PARK 10100 19.1 16.5 116 15.5 15.6 99
LITTLE WARM 9620 18.5 13.5 137 21.3 14.7 145
SOUTH PASS 9040 26.5 17.6 151 26.2 18.7 140
ST. LAWRENCE ALT 8620 9.8 7.1 138 12.8 11.3 113
TOGWOTEE PASS 9580 35.6 27.0 132 34.8 30.4 114
TOWNSEND CREEK 8700 11.3 10.4 109 14.0 13.9 101
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Basin wide percent of average 133 124
BIGHORN BASIN
BALD MTN. 9375 23.8 22.3 107 20.1 19.0 106
BEAR TRAP MEADOW 7900 -M 6.9 * 10.6 9.3 114
BLACKWATER 9780 40.1 24.7 162 30.5 19.3 158
BONE SPRINGS DIV 9350 20.5 18.1 113 18.5 16.5 112
EVENING STAR 9200 42.5 29.2 146 41.4 24.2 171
GRAVE SPRINGS 8550 13.2 -M * 12.6 10.9 116
KIRWIN 9550 15.8 11.1 142 17.1 12.0 143
LOST CREEK 8080 18.6 15.2 122 17.5 13.3 132
MARQUETTE 8760 13.1 8.7 151 13.4 11.4 118
MIDDLE POWDER 7760 19.1 13.6 140 16.2 13.2 123
OWL CREEK 8975 9.4 4.7 200 7.4 7.1 104
POWDER RIVER PASS 9480 -M 11.6 * 14.8 13.0 114
SHELL CREEK 9580 19.3 16.2 119 16.2 14.4 112
SYLVAN LAKE 8420 32.1 23.9 134 33.8 20.7 163
SYLVAN ROAD 8120 20.3 10.8 188 27.7 17.3 160
TIMBER CREEK 7950 7.7 6.6 117 9.1 8.4 108
YOUNTS PEAK 8350 25.1 18.3 137 -M 17.9 *
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Basin wide percent of average 138 133
SHOSHONE RIVER
BLACKWATER 9780 40.1 24.7 162 30.5 19.3 158
EVENING STAR 9200 42.5 29.2 146 41.4 24.2 171
KIRWIN 9550 15.8 11.1 142 17.1 12.0 143
MARQUETTE 8760 13.1 8.7 151 13.4 11.4 118
SYLVAN LAKE 8420 32.1 23.9 134 33.8 20.7 163
SYLVAN ROAD 8120 20.3 10.8 188 27.7 17.3 160
YOUNTS PEAK 8350 25.1 18.3 137 -M 17.9 *
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Basin wide percent of average 149 156
POWDER-TONGUE
BEAR TRAP MEADOW 7900 -M 6.9 * 10.6 9.3 114
BONE SPRINGS DIV 9350 20.5 18.1 113 18.5 16.5 112
BURGESS JUNCTION 7880 15.9 12.9 123 15.6 12.9 121
CLOUD PEAK RESERVOIR 9860 19.6 16.8 117 16.9 15.1 112
DOME LAKE 8880 14.6 14.8 99 16.5 14.7 112
GRAVE SPRINGS 8550 13.2 -M * 12.6 10.9 116
HANSEN SAWMILL 8760 5.5 7.6 72 9.3 9.0 103
LOST CREEK 8080 18.6 15.2 122 17.5 13.3 132
MIDDLE POWDER 7760 19.1 13.6 140 16.2 13.2 123
POWDER RIVER PASS 9480 -M 11.6 * 14.8 13.0 114
SUCKER CREEK 8880 17.1 13.3 129 18.0 14.7 122
TIE CREEK 6870 7.3 -M * 14.4 12.3 117
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Basin wide percent of average 117 117
BELLE FOURCHE
BLIND PARK 6890 11.0 11.6 95 17.1 11.8 145
NORTH RAPID CREEK 6130 12.4 -M * 15.2 -M *
WARREN PEAK 6520 21.3 11.6 184 -M 9.1 *
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Basin wide percent of average 139 145*
UPPER N. PLATTE RIVER
COLUMBINE 9400 30.8 24.4 126 33.9 26.2 129
DIVIDE PEAK 8800 29.5 21.8 135 27.3 24.9 110
ELK RIVER 8700 29.6 20.4 145 27.6 20.6 134
JOE WRIGHT 10120 28.9 24.2 119 32.3 27.5 117
NORTH FRENCH CREEK 10100 37.3 28.2 132 31.2 25.6 122
OLD BATTLE 10000 44.1 35.8 123 41.0 32.8 125
SOUTH BRUSH CREEK 8400 13.4 13.0 103 19.2 18.3 105
TOWER 10500 58.2 49.0 119 48.4 39.5 123
WEBBER SPRINGS 9200 33.1 28.6 116 38.6 27.7 139
WILLOW CREEK PASS 9540 22.2 13.5 164 17.7 13.9 127
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Basin wide percent of average 126 123
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 38.0 29.0 131 29.1 21.5 135
CASPER MTN. 7900 25.4 19.0 134 22.9 16.2 141
CHRISTINA LAKE 9980 20.7 16.7 124 24.0 18.3 131
DEADMAN HILL 10220 18.8 17.8 106 20.6 18.8 110
LAPRELE CREEK 8320 15.1 10.0 151 16.2 13.2 123
RENO HILL 8400 26.4 15.5 170 23.1 20.7 112
ROACH 9700 24.6 18.1 136 24.3 23.3 104
SAND LAKE 10080 41.3 35.7 116 31.7 22.4 142
SOUTH PASS 9040 26.5 17.6 151 26.2 18.7 140
WINDY PEAK 7840 10.6 9.3 114 13.4 10.8 124
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Basin wide percent of average 131 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 17.6 10.9 161 29.7 16.8 177
DIVIDE PEAK 8800 29.5 21.8 135 27.3 24.9 110
OLD BATTLE 10000 44.1 35.8 123 41.0 32.8 125
SANDSTONE RS 8150 19.8 15.3 129 23.4 20.7 113
WHISKEY PARK 8950 41.6 30.7 136 33.9 30.9 110
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Basin wide percent of average 133 123
UPPER GREEN RIVER
BIG SANDY OPENING 9100 19.5 15.4 127 17.8 17.5 102
BLIND BULL SUM 8650 44.4 31.0 143 33.9 25.7 132
EAST RIM DIVIDE 7930 17.4 15.0 116 17.8 16.3 109
ELKHART PARK G.S. 9400 18.4 15.0 123 19.3 17.2 112
GROS VENTRE SUMMIT 8775 23.2 16.0 145 21.9 17.1 128
KENDALL R.S. 7740 23.9 13.1 182 24.2 16.7 145
LOOMIS PARK 8240 -M 16.9 * 28.0 20.3 138
NEW FORK LAKE 8340 15.7 10.7 147 13.8 15.5 89
SNIDER BASIN 8250 23.5 15.5 152 19.9 16.3 122
SPRING CREEK DIVIDE 9000 37.9 29.4 129 33.7 29.4 115
TRIPLE PEAK 8500 36.5 26.9 136 38.7 33.2 117
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Basin wide percent of average 139 119
LOWER GREEN RIVER
HAMS FORK 7840 15.7 5.7 275 15.4 14.4 107
HEWINTA 9500 14.1 9.0 157 15.1 14.6 103
HICKERSON PARK 9150 11.5 6.6 174 11.5 10.8 106
HOLE-IN-ROCK 9150 10.9 6.2 176 11.7 10.8 108
INDIAN CREEK 9425 40.4 30.4 133 32.7 27.8 118
KELLEY R.S. 8180 25.1 17.6 143 26.5 20.2 131
STEEL CREEK PARK 10100 17.5 17.9 98 17.1 14.3 120
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Basin wide percent of average 145 115
UPPER BEAR RIVER
BUG LAKE 7950 34.4 20.0 172 30.5 21.0 145
HAYDEN FORK 9400 18.6 10.8 172 26.2 20.9 125
KELLEY R.S. 8180 25.1 17.6 143 26.5 20.2 131
LILY LAKE 9050 20.2 12.9 157 20.5 16.3 126
MONTE CRISTO 8960 43.2 29.3 147 34.3 27.8 123
SALT RIVER SUMMIT 7600 22.2 13.8 161 24.6 18.2 135
TRIAL LAKE 9960 36.4 26.0 140 35.3 26.0 136
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Basin wide percent of average 153 132
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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.