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 SATURDAY: MAY 3 , 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 25.9 9.9 262 38.9 25.4 153
COTTONWOOD CREEK 7600 33.0 19.1 173 39.5 28.4 139
GRANITE CREEK 6770 25.2 12.1 208 35.6 27.0 132
GRASSY LAKE 7265 48.0 32.9 146 61.2 42.2 145
GROS VENTRE SUMMIT 8775 23.8 13.4 178 23.1 18.2 127
LEWIS LAKE DIVIDE 7860 54.7 33.7 162 63.5 42.9 148
PHILLIPS BENCH 8200 43.5 28.9 151 50.9 33.8 151
SALT RIVER SUMMIT 7600 20.1 9.3 216 26.7 19.3 138
SNAKE RIVER STATION 6920 22.2 15.7 141 40.8 29.6 138
SPRING CREEK DIVIDE 9000 42.1 29.1 145 37.3 31.0 120
THUMB DIVIDE 7980 29.9 14.5 206 36.9 23.8 155
TOGWOTEE PASS 9580 38.7 28.0 138 39.4 32.1 123
TWO OCEAN PLATEAU 9360 50.8 27.4 185 -M 34.9 *
WILLOW CREEK 8450 45.7 31.3 146 53.3 36.4 146
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Basin wide percent of average 165 140
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.8 * 34.5 21.4 161
BLACK BEAR 7950 -M 39.4 * -M 46.8 *
CANYON 7940 22.1 10.3 215 -M 16.5 *
FISHER CREEK 9100 60.8 38.5 158 -M 42.5 *
MADISON PLATEAU 7750 42.5 23.1 184 46.0 30.1 153
NORTHEAST ENTRANCE 7350 8.8 5.4 163 22.7 14.1 161
PARKER PEAK 9400 37.9 23.6 161 -M 18.4 *
SYLVAN LAKE 8420 32.3 23.3 139 36.9 22.6 163
THUMB DIVIDE 7980 29.9 14.5 206 36.9 23.8 155
TWO OCEAN PLATEAU 9360 50.8 27.4 185 -M 34.9 *
WHISKEY CREEK 6800 22.8 14.4 158 34.9 25.1 139
WHITE MILL 8700 42.8 26.1 164 -M 32.9 *
WOLVERINE 7650 12.7 7.4 172 18.4 15.4 119
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Basin wide percent of average 170 151
WIND RIVER
BURROUGHS CREEK 8750 24.4 12.0 203 28.7 19.6 146
CHRISTINA LAKE 9980 23.2 17.9 130 27.5 20.3 135
COLD SPRINGS 9630 8.8 6.2 142 16.5 13.3 124
HOBBS PARK 10100 23.3 17.8 131 19.6 17.5 112
LITTLE WARM 9620 19.8 9.7 204 24.3 16.5 147
SOUTH PASS 9040 28.4 17.9 159 30.0 20.8 144
ST. LAWRENCE ALT 8620 11.8 5.0 236 16.3 12.6 129
TOGWOTEE PASS 9580 38.7 28.0 138 39.4 32.1 123
TOWNSEND CREEK 8700 13.5 9.0 150 18.3 15.7 117
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Basin wide percent of average 155 131
BIGHORN BASIN
BALD MTN. 9375 26.5 24.1 110 22.5 21.1 107
BEAR TRAP MEADOW 7900 5.6 3.8 147 12.8 10.8 119
BLACKWATER 9780 43.2 25.6 169 33.8 20.8 162
BONE SPRINGS DIV 9350 22.5 18.1 124 21.1 18.4 115
EVENING STAR 9200 45.8 30.7 149 45.9 26.2 175
GRAVE SPRINGS 8550 13.6 -M * 14.7 12.6 117
KIRWIN 9550 17.9 11.5 156 20.1 13.5 149
LOST CREEK 8080 21.6 15.5 139 20.4 15.2 134
MARQUETTE 8760 15.3 8.5 180 16.2 13.7 118
MIDDLE POWDER 7760 19.6 14.7 133 18.7 15.0 125
OWL CREEK 8975 7.5 3.1 242 9.4 8.3 113
POWDER RIVER PASS 9480 -M 9.9 * 17.3 14.9 116
SHELL CREEK 9580 21.5 17.0 126 19.2 16.2 119
SYLVAN LAKE 8420 32.3 23.3 139 36.9 22.6 163
SYLVAN ROAD 8120 17.1 7.3 234 30.2 18.8 161
TIMBER CREEK 7950 7.6 5.5 138 11.6 10.2 114
YOUNTS PEAK 8350 25.3 17.9 141 -M 19.5 *
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Basin wide percent of average 145 136
SHOSHONE RIVER
BLACKWATER 9780 43.2 25.6 169 33.8 20.8 162
EVENING STAR 9200 45.8 30.7 149 45.9 26.2 175
KIRWIN 9550 17.9 11.5 156 20.1 13.5 149
MARQUETTE 8760 15.3 8.5 180 16.2 13.7 118
SYLVAN LAKE 8420 32.3 23.3 139 36.9 22.6 163
SYLVAN ROAD 8120 17.1 7.3 234 30.2 18.8 161
YOUNTS PEAK 8350 25.3 17.9 141 -M 19.5 *
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Basin wide percent of average 158 158
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.6 3.8 147 12.8 10.8 119
BONE SPRINGS DIV 9350 22.5 18.1 124 21.1 18.4 115
BURGESS JUNCTION 7880 17.4 13.2 132 17.5 14.6 120
CLOUD PEAK RESERVOIR 9860 23.1 17.5 132 20.6 17.4 118
DOME LAKE 8880 -M 14.3 * 19.7 16.6 119
GRAVE SPRINGS 8550 13.6 -M * 14.7 12.6 117
HANSEN SAWMILL 8760 7.2 6.5 111 12.1 10.5 115
LOST CREEK 8080 21.6 15.5 139 20.4 15.2 134
MIDDLE POWDER 7760 19.6 14.7 133 18.7 15.0 125
POWDER RIVER PASS 9480 -M 9.9 * 17.3 14.9 116
SUCKER CREEK 8880 -M 13.3 * 21.4 16.8 127
TIE CREEK 6870 8.1 -M * 17.5 14.0 125
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Basin wide percent of average 131 121
BELLE FOURCHE
BLIND PARK 6890 8.2 8.9 92 19.4 14.1 138
NORTH RAPID CREEK 6130 10.7 -M * 18.3 -M *
WARREN PEAK 6520 20.7 8.9 233 -M 10.5 *
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Basin wide percent of average 162 138*
UPPER N. PLATTE RIVER
COLUMBINE 9400 29.8 21.0 142 38.2 28.3 135
DIVIDE PEAK 8800 28.2 18.3 154 29.9 27.5 109
ELK RIVER 8700 26.3 15.1 174 30.7 22.3 138
JOE WRIGHT 10120 36.0 24.6 146 37.4 30.6 122
NORTH FRENCH CREEK 10100 41.0 29.0 141 36.1 28.3 128
OLD BATTLE 10000 49.8 38.0 131 46.5 36.0 129
SOUTH BRUSH CREEK 8400 11.0 9.9 111 21.7 20.8 104
TOWER 10500 31.8 51.1 62 57.5 43.6 132
WEBBER SPRINGS 9200 35.0 25.2 139 42.5 30.8 138
WILLOW CREEK PASS 9540 -M 13.1 * 20.1 15.6 129
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Basin wide percent of average 124 127
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.5 28.3 150 34.7 24.0 145
CASPER MTN. 7900 26.7 16.9 158 27.2 19.1 142
CHRISTINA LAKE 9980 23.2 17.9 130 27.5 20.3 135
DEADMAN HILL 10220 24.2 19.0 127 24.5 21.3 115
LAPRELE CREEK 8320 12.9 5.9 219 18.0 14.9 121
RENO HILL 8400 25.8 12.7 203 26.6 22.5 118
ROACH 9700 26.4 17.8 148 27.7 26.1 106
SAND LAKE 10080 45.2 36.9 122 35.0 25.0 140
SOUTH PASS 9040 28.4 17.9 159 30.0 20.8 144
WINDY PEAK 7840 6.9 7.3 95 14.3 12.4 115
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Basin wide percent of average 145 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 6.1 4.1 149 32.1 18.7 172
DIVIDE PEAK 8800 28.2 18.3 154 29.9 27.5 109
OLD BATTLE 10000 49.8 38.0 131 46.5 36.0 129
SANDSTONE RS 8150 13.6 8.7 156 26.2 23.2 113
WHISKEY PARK 8950 45.4 29.0 157 40.9 34.3 119
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Basin wide percent of average 146 126
UPPER GREEN RIVER
BIG SANDY OPENING 9100 18.4 13.3 138 19.5 18.6 105
BLIND BULL SUM 8650 44.7 22.7 197 36.9 27.1 136
EAST RIM DIVIDE 7930 16.6 14.5 114 18.8 17.4 108
ELKHART PARK G.S. 9400 18.9 13.4 141 20.9 18.3 114
GROS VENTRE SUMMIT 8775 23.8 13.4 178 23.1 18.2 127
KENDALL R.S. 7740 19.1 9.1 210 25.0 17.7 141
LOOMIS PARK 8240 -M 14.6 * 29.7 21.6 138
NEW FORK LAKE 8340 12.3 8.7 141 15.0 16.5 91
SNIDER BASIN 8250 21.2 12.4 171 21.9 17.3 127
SPRING CREEK DIVIDE 9000 42.1 29.1 145 37.3 31.0 120
TRIPLE PEAK 8500 35.3 24.5 144 43.7 35.2 124
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Basin wide percent of average 157 122
LOWER GREEN RIVER
HAMS FORK 7840 13.1 4.9 267 18.8 15.3 123
HEWINTA 9500 9.2 4.5 204 17.3 16.5 105
HICKERSON PARK 9150 9.7 2.6 373 12.5 12.5 100
HOLE-IN-ROCK 9150 8.2 2.0 410 12.9 12.5 103
INDIAN CREEK 9425 43.8 28.3 155 36.8 29.4 125
KELLEY R.S. 8180 23.1 14.3 162 35.1 21.5 163
STEEL CREEK PARK 10100 21.0 18.6 113 19.9 16.3 122
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Basin wide percent of average 170 124
UPPER BEAR RIVER
BUG LAKE 7950 34.6 15.2 228 34.4 22.7 152
HAYDEN FORK 9400 15.2 5.8 262 29.9 23.2 129
KELLEY R.S. 8180 23.1 14.3 162 35.1 21.5 163
LILY LAKE 9050 16.6 8.3 200 23.7 18.2 130
MONTE CRISTO 8960 43.1 25.6 168 39.3 30.5 129
SALT RIVER SUMMIT 7600 20.1 9.3 216 26.7 19.3 138
TRIAL LAKE 9960 36.9 23.6 156 37.0 28.5 130
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Basin wide percent of average 186 138
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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.