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: MAY 6 , 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 24.2 8.6 281 39.1 25.6 153
COTTONWOOD CREEK 7600 32.2 17.9 180 39.6 28.7 138
GRANITE CREEK 6770 23.7 10.9 217 35.7 27.3 131
GRASSY LAKE 7265 47.4 31.5 150 61.3 42.6 144
GROS VENTRE SUMMIT 8775 22.7 12.5 182 23.3 18.4 127
LEWIS LAKE DIVIDE 7860 55.5 32.7 170 63.6 43.3 147
PHILLIPS BENCH 8200 43.4 28.0 155 50.9 34.2 149
SALT RIVER SUMMIT 7600 18.4 6.9 267 26.8 19.6 137
SNAKE RIVER STATION 6920 20.0 14.7 136 40.8 29.9 136
SPRING CREEK DIVIDE 9000 39.8 28.3 141 37.3 31.3 119
THUMB DIVIDE 7980 28.6 13.7 209 37.0 24.0 154
TOGWOTEE PASS 9580 38.6 27.5 140 39.8 32.4 123
TWO OCEAN PLATEAU 9360 -M 27.1 * -M 35.3 *
WILLOW CREEK 8450 45.0 30.4 148 53.4 36.8 145
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Basin wide percent of average 167 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.6 * 34.7 21.8 159
BLACK BEAR 7950 -M 38.8 * -M 47.2 *
CANYON 7940 20.8 9.3 224 -M 16.7 *
FISHER CREEK 9100 60.4 38.2 158 -M 43.0 *
MADISON PLATEAU 7750 41.9 22.1 190 46.0 30.4 151
NORTHEAST ENTRANCE 7350 7.6 4.7 162 22.7 14.3 159
PARKER PEAK 9400 38.3 23.3 164 -M 18.7 *
SYLVAN LAKE 8420 32.0 22.7 141 36.9 22.9 161
THUMB DIVIDE 7980 28.6 13.7 209 37.0 24.0 154
TWO OCEAN PLATEAU 9360 -M 27.1 * -M 35.3 *
WHISKEY CREEK 6800 22.1 13.2 167 35.0 25.3 138
WHITE MILL 8700 42.4 25.8 164 -M 33.2 *
WOLVERINE 7650 11.1 6.3 176 18.4 15.7 117
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Basin wide percent of average 170 149
WIND RIVER
BURROUGHS CREEK 8750 23.3 10.8 216 28.9 19.9 145
CHRISTINA LAKE 9980 21.9 17.7 124 27.8 20.6 135
COLD SPRINGS 9630 8.7 5.4 161 16.6 13.6 122
HOBBS PARK 10100 21.6 17.6 123 19.6 17.9 109
LITTLE WARM 9620 19.0 8.6 221 24.4 16.8 145
SOUTH PASS 9040 27.5 17.5 157 30.1 21.1 143
ST. LAWRENCE ALT 8620 11.0 4.3 256 16.4 12.9 127
TOGWOTEE PASS 9580 38.6 27.5 140 39.8 32.4 123
TOWNSEND CREEK 8700 12.5 8.3 151 18.5 16.0 116
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Basin wide percent of average 156 130
BIGHORN BASIN
BALD MTN. 9375 26.5 24.2 110 22.6 21.5 105
BEAR TRAP MEADOW 7900 4.6 3.2 144 12.9 11.1 116
BLACKWATER 9780 43.3 25.4 170 34.1 21.1 162
BONE SPRINGS DIV 9350 21.5 17.8 121 21.4 18.8 114
EVENING STAR 9200 45.7 30.6 149 46.0 26.5 174
GRAVE SPRINGS 8550 13.2 -M * 14.8 13.0 114
KIRWIN 9550 17.6 11.1 159 20.2 13.8 146
LOST CREEK 8080 21.7 15.0 145 20.4 15.6 131
MARQUETTE 8760 15.0 8.2 183 16.3 14.1 116
MIDDLE POWDER 7760 18.8 14.5 130 18.8 15.3 123
OWL CREEK 8975 6.0 2.5 240 9.7 8.5 114
POWDER RIVER PASS 9480 -M 9.0 * 17.5 15.3 114
SHELL CREEK 9580 21.9 17.0 129 19.2 16.5 116
SYLVAN LAKE 8420 32.0 22.7 141 36.9 22.9 161
SYLVAN ROAD 8120 14.7 6.5 226 30.2 19.1 158
TIMBER CREEK 7950 6.5 4.8 135 11.6 10.6 109
YOUNTS PEAK 8350 24.7 17.4 142 -M 19.8 *
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Basin wide percent of average 145 134
SHOSHONE RIVER
BLACKWATER 9780 43.3 25.4 170 34.1 21.1 162
EVENING STAR 9200 45.7 30.6 149 46.0 26.5 174
KIRWIN 9550 17.6 11.1 159 20.2 13.8 146
MARQUETTE 8760 15.0 8.2 183 16.3 14.1 116
SYLVAN LAKE 8420 32.0 22.7 141 36.9 22.9 161
SYLVAN ROAD 8120 14.7 6.5 226 30.2 19.1 158
YOUNTS PEAK 8350 24.7 17.4 142 -M 19.8 *
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Basin wide percent of average 158 156
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.6 3.2 144 12.9 11.1 116
BONE SPRINGS DIV 9350 21.5 17.8 121 21.4 18.8 114
BURGESS JUNCTION 7880 17.0 12.6 135 17.9 14.9 120
CLOUD PEAK RESERVOIR 9860 22.9 17.1 134 20.8 17.8 117
DOME LAKE 8880 17.2 13.3 129 19.7 17.0 116
GRAVE SPRINGS 8550 13.2 -M * 14.8 13.0 114
HANSEN SAWMILL 8760 6.2 5.9 105 12.1 10.7 113
LOST CREEK 8080 21.7 15.0 145 20.4 15.6 131
MIDDLE POWDER 7760 18.8 14.5 130 18.8 15.3 123
POWDER RIVER PASS 9480 -M 9.0 * 17.5 15.3 114
SUCKER CREEK 8880 20.3 12.6 161 21.6 17.1 126
TIE CREEK 6870 7.3 -M * 17.7 14.3 124
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Basin wide percent of average 134 119
BELLE FOURCHE
BLIND PARK 6890 7.1 7.8 91 19.6 14.5 135
NORTH RAPID CREEK 6130 10.2 -M * 18.6 -M *
WARREN PEAK 6520 20.2 7.8 259 -M 10.8 *
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Basin wide percent of average 175 135*
UPPER N. PLATTE RIVER
COLUMBINE 9400 28.4 19.2 148 38.4 28.6 134
DIVIDE PEAK 8800 27.4 16.9 162 30.2 27.9 108
ELK RIVER 8700 25.0 13.5 185 31.0 22.5 138
JOE WRIGHT 10120 36.0 24.3 148 37.5 31.0 121
NORTH FRENCH CREEK 10100 40.3 28.4 142 36.3 28.7 126
OLD BATTLE 10000 49.5 37.7 131 46.5 36.3 128
SOUTH BRUSH CREEK 8400 9.7 8.9 109 21.8 21.0 104
TOWER 10500 31.6 51.0 62 59.6 44.2 135
WEBBER SPRINGS 9200 32.9 24.0 137 42.6 31.1 137
WILLOW CREEK PASS 9540 -M 12.5 * 20.3 15.9 128
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Basin wide percent of average 125 127
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.0 27.5 153 34.8 24.3 143
CASPER MTN. 7900 26.1 15.4 169 27.4 19.5 141
CHRISTINA LAKE 9980 21.9 17.7 124 27.8 20.6 135
DEADMAN HILL 10220 23.0 18.9 122 24.6 21.7 113
LAPRELE CREEK 8320 11.4 5.3 215 18.3 15.2 120
RENO HILL 8400 24.6 11.7 210 26.9 22.7 119
ROACH 9700 26.1 17.4 150 27.8 26.5 105
SAND LAKE 10080 45.2 36.6 123 35.1 25.4 138
SOUTH PASS 9040 27.5 17.5 157 30.1 21.1 143
WINDY PEAK 7840 5.0 6.3 79 14.7 12.8 115
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Basin wide percent of average 145 128
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.7 3.1 87 33.0 18.9 175
DIVIDE PEAK 8800 27.4 16.9 162 30.2 27.9 108
OLD BATTLE 10000 49.5 37.7 131 46.5 36.3 128
SANDSTONE RS 8150 11.4 7.1 161 26.2 23.5 111
WHISKEY PARK 8950 45.5 28.1 162 41.0 34.7 118
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Basin wide percent of average 147 125
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.3 12.4 140 19.7 18.8 105
BLIND BULL SUM 8650 44.2 22.6 196 37.0 27.3 136
EAST RIM DIVIDE 7930 15.6 14.1 111 18.8 17.6 107
ELKHART PARK G.S. 9400 18.5 12.5 148 21.0 18.5 114
GROS VENTRE SUMMIT 8775 22.7 12.5 182 23.3 18.4 127
KENDALL R.S. 7740 16.9 6.8 249 25.0 17.9 140
LOOMIS PARK 8240 -M 13.7 * 29.8 21.8 137
NEW FORK LAKE 8340 10.7 8.1 132 15.2 16.7 91
SNIDER BASIN 8250 18.9 11.4 166 21.9 17.5 125
SPRING CREEK DIVIDE 9000 39.8 28.3 141 37.3 31.3 119
TRIPLE PEAK 8500 34.5 23.6 146 43.9 35.6 123
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Basin wide percent of average 157 121
LOWER GREEN RIVER
HAMS FORK 7840 10.7 3.7 289 19.0 15.5 123
HEWINTA 9500 6.4 3.4 188 17.2 16.7 103
HICKERSON PARK 9150 7.0 2.1 333 12.6 12.8 98
HOLE-IN-ROCK 9150 5.5 1.7 324 12.8 12.8 100
INDIAN CREEK 9425 44.3 27.5 161 37.0 29.7 125
KELLEY R.S. 8180 21.6 13.2 164 35.3 21.7 163
STEEL CREEK PARK 10100 20.9 18.1 115 20.0 16.7 120
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Basin wide percent of average 167 122
UPPER BEAR RIVER
BUG LAKE 7950 32.4 13.9 233 34.5 23.0 150
HAYDEN FORK 9400 13.8 4.5 307 29.9 23.5 127
KELLEY R.S. 8180 21.6 13.2 164 35.3 21.7 163
LILY LAKE 9050 14.0 7.6 184 23.6 18.5 128
MONTE CRISTO 8960 40.3 24.7 163 39.4 30.8 128
SALT RIVER SUMMIT 7600 18.4 6.9 267 26.8 19.6 137
TRIAL LAKE 9960 36.9 22.9 161 37.1 28.8 129
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Basin wide percent of average 189 137
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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.