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 SUNDAY: APRIL 20 , 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 14.3 206 36.6 24.3 151
COTTONWOOD CREEK 7600 30.5 22.3 137 34.3 27.3 126
GRANITE CREEK 6770 27.2 16.3 167 33.9 25.8 131
GRASSY LAKE 7265 48.8 36.6 133 57.1 40.5 141
GROS VENTRE SUMMIT 8775 23.0 15.3 150 22.1 17.4 127
LEWIS LAKE DIVIDE 7860 53.2 36.1 147 59.7 41.2 145
PHILLIPS BENCH 8200 40.8 30.5 134 48.0 32.5 148
SALT RIVER SUMMIT 7600 21.1 12.9 164 24.8 18.5 134
SNAKE RIVER STATION 6920 26.6 17.9 149 38.1 28.4 134
SPRING CREEK DIVIDE 9000 38.1 29.5 129 33.9 29.8 114
THUMB DIVIDE 7980 32.3 16.7 193 34.5 22.8 151
TOGWOTEE PASS 9580 35.7 27.4 130 36.1 30.8 117
TWO OCEAN PLATEAU 9360 47.6 26.9 177 -M 33.5 *
WILLOW CREEK 8450 40.0 31.8 126 46.0 35.0 131
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Basin wide percent of average 148 135
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 37.3 25.7 145 32.1 20.1 160
BLACK BEAR 7950 -M 40.1 * -M 44.6 *
CANYON 7940 22.9 12.7 180 -M 15.6 *
FISHER CREEK 9100 57.5 38.2 151 -M 40.3 *
MADISON PLATEAU 7750 45.3 25.0 181 43.7 28.7 152
NORTHEAST ENTRANCE 7350 10.8 8.0 135 20.3 13.2 154
PARKER PEAK 9400 33.3 23.4 142 -M 17.3 *
SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162
THUMB DIVIDE 7980 32.3 16.7 193 34.5 22.8 151
TWO OCEAN PLATEAU 9360 47.6 26.9 177 -M 33.5 *
WHISKEY CREEK 6800 25.8 17.3 149 32.8 23.9 137
WHITE MILL 8700 40.0 26.0 154 -M 31.2 *
WOLVERINE 7650 13.7 10.6 129 16.3 14.3 114
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Basin wide percent of average 157 148
WIND RIVER
BURROUGHS CREEK 8750 24.3 14.6 166 27.3 18.4 148
CHRISTINA LAKE 9980 20.7 17.1 121 24.6 18.9 130
COLD SPRINGS 9630 9.4 8.1 116 13.6 12.2 111
HOBBS PARK 10100 18.8 17.0 111 15.5 16.2 96
LITTLE WARM 9620 18.3 12.5 146 21.5 15.2 141
SOUTH PASS 9040 25.2 17.8 142 26.2 19.3 136
ST. LAWRENCE ALT 8620 9.4 6.6 142 12.7 11.7 109
TOGWOTEE PASS 9580 35.7 27.4 130 36.1 30.8 117
TOWNSEND CREEK 8700 10.8 10.1 107 14.0 14.4 97
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Basin wide percent of average 132 122
BIGHORN BASIN
BALD MTN. 9375 24.0 22.9 105 20.3 19.6 104
BEAR TRAP MEADOW 7900 6.9 6.1 113 10.9 9.7 112
BLACKWATER 9780 40.5 25.0 162 31.4 19.7 159
BONE SPRINGS DIV 9350 19.5 18.2 107 19.4 17.0 114
EVENING STAR 9200 42.4 29.7 143 41.9 24.7 170
GRAVE SPRINGS 8550 13.1 -M * 12.9 11.4 113
KIRWIN 9550 15.8 11.3 140 17.3 12.4 140
LOST CREEK 8080 18.6 15.4 121 17.7 13.8 128
MARQUETTE 8760 12.7 8.7 146 13.6 12.0 113
MIDDLE POWDER 7760 18.6 14.0 133 16.4 13.7 120
OWL CREEK 8975 7.5 4.3 174 7.4 7.4 100
POWDER RIVER PASS 9480 -M 11.3 * 15.3 13.5 113
SHELL CREEK 9580 19.4 16.5 118 16.6 14.9 111
SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162
SYLVAN ROAD 8120 19.3 9.9 195 28.1 17.7 159
TIMBER CREEK 7950 7.4 6.4 116 9.1 8.9 102
YOUNTS PEAK 8350 24.8 18.3 136 -M 18.3 *
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Basin wide percent of average 134 132
SHOSHONE RIVER
BLACKWATER 9780 40.5 25.0 162 31.4 19.7 159
EVENING STAR 9200 42.4 29.7 143 41.9 24.7 170
KIRWIN 9550 15.8 11.3 140 17.3 12.4 140
MARQUETTE 8760 12.7 8.7 146 13.6 12.0 113
SYLVAN LAKE 8420 32.5 23.9 136 34.3 21.2 162
SYLVAN ROAD 8120 19.3 9.9 195 28.1 17.7 159
YOUNTS PEAK 8350 24.8 18.3 136 -M 18.3 *
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Basin wide percent of average 148 155
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.9 6.1 113 10.9 9.7 112
BONE SPRINGS DIV 9350 19.5 18.2 107 19.4 17.0 114
BURGESS JUNCTION 7880 16.0 13.1 122 15.9 13.3 120
CLOUD PEAK RESERVOIR 9860 19.3 17.1 113 17.3 15.7 110
DOME LAKE 8880 15.3 14.9 103 16.6 15.2 109
GRAVE SPRINGS 8550 13.1 -M * 12.9 11.4 113
HANSEN SAWMILL 8760 6.3 7.4 85 9.7 9.4 103
LOST CREEK 8080 18.6 15.4 121 17.7 13.8 128
MIDDLE POWDER 7760 18.6 14.0 133 16.4 13.7 120
POWDER RIVER PASS 9480 -M 11.3 * 15.3 13.5 113
SUCKER CREEK 8880 17.5 13.5 130 18.3 15.3 120
TIE CREEK 6870 7.4 -M * 14.8 12.8 116
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Basin wide percent of average 115 115
BELLE FOURCHE
BLIND PARK 6890 9.2 11.0 84 17.1 12.4 138
NORTH RAPID CREEK 6130 11.5 -M * 15.4 -M *
WARREN PEAK 6520 20.8 11.0 189 -M 9.5 *
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Basin wide percent of average 136 138*
UPPER N. PLATTE RIVER
COLUMBINE 9400 29.3 23.7 124 34.2 26.8 128
DIVIDE PEAK 8800 28.4 21.0 135 27.4 25.7 107
ELK RIVER 8700 28.1 19.1 147 27.7 21.0 132
JOE WRIGHT 10120 29.1 24.4 119 32.2 28.4 113
NORTH FRENCH CREEK 10100 37.7 28.6 132 31.6 26.4 120
OLD BATTLE 10000 43.6 36.6 119 41.4 33.7 123
SOUTH BRUSH CREEK 8400 13.2 12.2 108 19.2 19.0 101
TOWER 10500 57.5 49.7 116 52.7 40.6 130
WEBBER SPRINGS 9200 30.8 27.8 111 38.7 28.6 135
WILLOW CREEK PASS 9540 22.1 13.5 164 18.1 14.4 126
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Basin wide percent of average 125 122
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 38.8 29.0 134 30.6 22.2 138
CASPER MTN. 7900 24.8 18.6 133 23.1 17.0 136
CHRISTINA LAKE 9980 20.7 17.1 121 24.6 18.9 130
DEADMAN HILL 10220 18.1 18.2 99 20.8 19.5 107
LAPRELE CREEK 8320 15.3 8.8 174 16.3 13.6 120
RENO HILL 8400 24.5 14.8 166 23.2 21.2 109
ROACH 9700 26.3 18.1 145 24.4 24.1 101
SAND LAKE 10080 41.2 36.2 114 32.5 23.2 140
SOUTH PASS 9040 25.2 17.8 142 26.2 19.3 136
WINDY PEAK 7840 9.9 8.9 111 13.3 11.2 119
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Basin wide percent of average 131 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.7 9.0 130 30.1 17.3 174
DIVIDE PEAK 8800 28.4 21.0 135 27.4 25.7 107
OLD BATTLE 10000 43.6 36.6 119 41.4 33.7 123
SANDSTONE RS 8150 16.3 13.6 120 23.4 21.4 109
WHISKEY PARK 8950 41.5 30.4 137 36.2 31.9 113
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Basin wide percent of average 128 122
UPPER GREEN RIVER
BIG SANDY OPENING 9100 19.2 14.9 129 18.0 17.8 101
BLIND BULL SUM 8650 43.6 28.4 154 34.3 26.1 131
EAST RIM DIVIDE 7930 17.2 14.9 115 17.9 16.6 108
ELKHART PARK G.S. 9400 18.9 14.7 129 19.4 17.5 111
GROS VENTRE SUMMIT 8775 23.0 15.3 150 22.1 17.4 127
KENDALL R.S. 7740 21.9 12.3 178 24.3 17.0 143
LOOMIS PARK 8240 -M 16.3 * 28.1 20.6 136
NEW FORK LAKE 8340 14.1 10.2 138 13.9 15.8 88
SNIDER BASIN 8250 22.6 14.7 154 20.0 16.6 120
SPRING CREEK DIVIDE 9000 38.1 29.5 129 33.9 29.8 114
TRIPLE PEAK 8500 33.5 26.3 127 39.3 33.8 116
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Basin wide percent of average 139 118
LOWER GREEN RIVER
HAMS FORK 7840 13.4 5.7 235 15.6 14.7 106
HEWINTA 9500 9.6 7.8 123 15.1 15.1 100
HICKERSON PARK 9150 11.4 5.4 211 11.4 11.3 101
HOLE-IN-ROCK 9150 10.0 5.0 200 11.7 11.3 104
INDIAN CREEK 9425 40.7 29.9 136 32.9 28.2 117
KELLEY R.S. 8180 23.2 16.8 138 28.4 20.5 139
STEEL CREEK PARK 10100 17.1 18.2 94 17.3 14.9 116
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Basin wide percent of average 141 114
UPPER BEAR RIVER
BUG LAKE 7950 32.4 18.8 172 30.6 21.5 142
HAYDEN FORK 9400 14.9 9.5 157 26.3 21.6 122
KELLEY R.S. 8180 23.2 16.8 138 28.4 20.5 139
LILY LAKE 9050 15.7 11.6 135 20.5 16.8 122
MONTE CRISTO 8960 37.0 28.3 131 34.5 28.6 121
SALT RIVER SUMMIT 7600 21.1 12.9 164 24.8 18.5 134
TRIAL LAKE 9960 34.3 25.4 135 35.3 26.7 132
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Basin wide percent of average 145 130
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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.