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 WEDNESDAY: MAY 7 , 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 23.2 8.2 283 39.1 25.7 152
COTTONWOOD CREEK 7600 31.4 17.4 180 39.6 28.8 138
GRANITE CREEK 6770 23.2 10.5 221 35.7 27.4 130
GRASSY LAKE 7265 46.1 31.0 149 61.3 42.8 143
GROS VENTRE SUMMIT 8775 22.3 12.3 181 23.2 18.5 125
LEWIS LAKE DIVIDE 7860 55.5 32.3 172 63.7 43.5 146
PHILLIPS BENCH 8200 43.1 27.7 156 50.9 34.3 148
SALT RIVER SUMMIT 7600 17.5 6.2 282 26.8 19.6 137
SNAKE RIVER STATION 6920 19.2 14.3 134 40.9 30.0 136
SPRING CREEK DIVIDE 9000 38.2 28.1 136 37.3 31.4 119
THUMB DIVIDE 7980 27.3 13.4 204 37.1 24.1 154
TOGWOTEE PASS 9580 38.5 27.3 141 39.8 32.6 122
TWO OCEAN PLATEAU 9360 49.1 27.0 182 -M 35.4 *
WILLOW CREEK 8450 44.3 30.1 147 53.5 36.9 145
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Basin wide percent of average 168 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.5 * 35.1 21.9 160
BLACK BEAR 7950 -M 38.6 * -M 47.3 *
CANYON 7940 20.4 9.0 227 -M 16.8 *
FISHER CREEK 9100 60.7 38.1 159 -M 43.1 *
MADISON PLATEAU 7750 41.1 21.7 189 46.2 30.6 151
NORTHEAST ENTRANCE 7350 7.0 4.5 156 23.3 14.4 162
PARKER PEAK 9400 38.6 23.3 166 -M 18.8 *
SYLVAN LAKE 8420 31.7 22.4 142 37.2 23.1 161
THUMB DIVIDE 7980 27.3 13.4 204 37.1 24.1 154
TWO OCEAN PLATEAU 9360 49.1 27.0 182 -M 35.4 *
WHISKEY CREEK 6800 21.8 12.8 170 35.1 25.4 138
WHITE MILL 8700 43.1 25.7 168 -M 33.4 *
WOLVERINE 7650 10.6 5.9 180 18.8 15.8 119
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Basin wide percent of average 172 150
WIND RIVER
BURROUGHS CREEK 8750 23.1 10.3 224 28.9 20.0 145
CHRISTINA LAKE 9980 21.8 17.6 124 27.8 20.8 134
COLD SPRINGS 9630 8.6 5.1 169 16.6 13.7 121
HOBBS PARK 10100 21.7 17.5 124 19.6 18.0 109
LITTLE WARM 9620 18.5 8.3 223 24.4 16.9 144
SOUTH PASS 9040 26.8 17.4 154 30.2 21.3 142
ST. LAWRENCE ALT 8620 10.4 4.1 254 16.4 12.9 127
TOGWOTEE PASS 9580 38.5 27.3 141 39.8 32.6 122
TOWNSEND CREEK 8700 11.9 8.0 149 18.5 16.1 115
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Basin wide percent of average 157 129
BIGHORN BASIN
BALD MTN. 9375 26.4 24.2 109 22.9 21.7 106
BEAR TRAP MEADOW 7900 3.6 3.0 120 12.9 11.2 115
BLACKWATER 9780 43.3 25.3 171 34.2 21.3 161
BONE SPRINGS DIV 9350 21.7 17.6 123 21.4 18.9 113
EVENING STAR 9200 45.6 30.6 149 46.5 26.7 174
GRAVE SPRINGS 8550 12.6 -M * 14.8 13.1 113
KIRWIN 9550 17.3 11.0 157 20.2 13.9 145
LOST CREEK 8080 21.6 14.9 145 20.4 15.7 130
MARQUETTE 8760 14.6 8.2 178 16.3 14.2 115
MIDDLE POWDER 7760 18.0 14.5 124 18.8 15.5 121
OWL CREEK 8975 5.0 2.4 208 9.6 8.6 112
POWDER RIVER PASS 9480 -M 8.7 * 17.9 15.4 116
SHELL CREEK 9580 21.4 17.0 126 19.2 16.7 115
SYLVAN LAKE 8420 31.7 22.4 142 37.2 23.1 161
SYLVAN ROAD 8120 14.1 6.2 227 30.4 19.2 158
TIMBER CREEK 7950 5.9 4.5 131 11.6 10.7 108
YOUNTS PEAK 8350 24.3 17.2 141 -M 19.9 *
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Basin wide percent of average 144 133
SHOSHONE RIVER
BLACKWATER 9780 43.3 25.3 171 34.2 21.3 161
EVENING STAR 9200 45.6 30.6 149 46.5 26.7 174
KIRWIN 9550 17.3 11.0 157 20.2 13.9 145
MARQUETTE 8760 14.6 8.2 178 16.3 14.2 115
SYLVAN LAKE 8420 31.7 22.4 142 37.2 23.1 161
SYLVAN ROAD 8120 14.1 6.2 227 30.4 19.2 158
YOUNTS PEAK 8350 24.3 17.2 141 -M 19.9 *
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Basin wide percent of average 158 156
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.6 3.0 120 12.9 11.2 115
BONE SPRINGS DIV 9350 21.7 17.6 123 21.4 18.9 113
BURGESS JUNCTION 7880 16.6 12.5 133 18.0 15.0 120
CLOUD PEAK RESERVOIR 9860 22.7 17.0 134 20.8 17.9 116
DOME LAKE 8880 16.6 13.0 128 19.7 17.1 115
GRAVE SPRINGS 8550 12.6 -M * 14.8 13.1 113
HANSEN SAWMILL 8760 5.4 5.7 95 12.1 10.8 112
LOST CREEK 8080 21.6 14.9 145 20.4 15.7 130
MIDDLE POWDER 7760 18.0 14.5 124 18.8 15.5 121
POWDER RIVER PASS 9480 -M 8.7 * 17.9 15.4 116
SUCKER CREEK 8880 19.9 12.4 160 21.7 17.3 125
TIE CREEK 6870 6.7 -M * 17.8 14.4 124
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Basin wide percent of average 132 119
BELLE FOURCHE
BLIND PARK 6890 6.2 7.5 83 19.6 14.7 133
NORTH RAPID CREEK 6130 9.3 -M * 18.6 -M *
WARREN PEAK 6520 19.4 7.5 259 -M 10.9 *
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Basin wide percent of average 171 133*
UPPER N. PLATTE RIVER
COLUMBINE 9400 27.3 18.7 146 38.5 28.6 135
DIVIDE PEAK 8800 26.3 16.4 160 30.2 28.0 108
ELK RIVER 8700 23.3 12.9 181 30.9 22.6 137
JOE WRIGHT 10120 35.5 24.3 146 37.5 31.2 120
NORTH FRENCH CREEK 10100 39.7 28.2 141 36.3 28.8 126
OLD BATTLE 10000 49.0 37.6 130 46.5 36.5 127
SOUTH BRUSH CREEK 8400 8.6 8.6 100 21.8 21.1 103
TOWER 10500 31.4 51.0 62 59.6 44.4 134
WEBBER SPRINGS 9200 32.4 23.6 137 42.6 31.2 137
WILLOW CREEK PASS 9540 -M 12.3 * 20.3 16.0 127
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Basin wide percent of average 124 126
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.4 27.2 152 34.8 24.4 143
CASPER MTN. 7900 25.6 15.0 171 27.5 19.6 140
CHRISTINA LAKE 9980 21.8 17.6 124 27.8 20.8 134
DEADMAN HILL 10220 22.9 18.9 121 24.6 21.8 113
LAPRELE CREEK 8320 10.5 5.1 206 18.3 15.4 119
RENO HILL 8400 23.8 11.3 211 26.9 22.8 118
ROACH 9700 27.8 17.2 162 27.8 26.7 104
SAND LAKE 10080 45.2 36.4 124 35.4 25.5 139
SOUTH PASS 9040 26.8 17.4 154 30.2 21.3 142
WINDY PEAK 7840 4.0 6.0 67 14.6 12.9 113
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Basin wide percent of average 145 127
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 2.7 * 33.0 19.0 174
DIVIDE PEAK 8800 26.3 16.4 160 30.2 28.0 108
OLD BATTLE 10000 49.0 37.6 130 46.5 36.5 127
SANDSTONE RS 8150 9.6 6.6 145 26.2 23.6 111
WHISKEY PARK 8950 45.1 27.8 162 41.0 34.8 118
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Basin wide percent of average 147 125
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.5 12.1 136 19.7 18.9 104
BLIND BULL SUM 8650 44.3 22.6 196 37.0 27.4 135
EAST RIM DIVIDE 7930 15.1 13.9 109 18.8 17.7 106
ELKHART PARK G.S. 9400 17.9 12.2 147 21.0 18.6 113
GROS VENTRE SUMMIT 8775 22.3 12.3 181 23.2 18.5 125
KENDALL R.S. 7740 16.4 6.1 269 25.0 18.0 139
LOOMIS PARK 8240 -M 13.5 * 29.8 21.9 136
NEW FORK LAKE 8340 10.0 7.9 127 15.3 16.8 91
SNIDER BASIN 8250 18.2 11.1 164 21.9 17.6 124
SPRING CREEK DIVIDE 9000 38.2 28.1 136 37.3 31.4 119
TRIPLE PEAK 8500 33.2 23.4 142 44.0 35.7 123
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Basin wide percent of average 155 121
LOWER GREEN RIVER
HAMS FORK 7840 9.7 3.3 294 19.0 15.5 123
HEWINTA 9500 5.3 3.0 177 17.2 16.8 102
HICKERSON PARK 9150 6.0 1.9 316 12.6 12.9 98
HOLE-IN-ROCK 9150 4.1 1.5 273 12.8 12.9 99
INDIAN CREEK 9425 42.9 27.2 158 37.0 29.8 124
KELLEY R.S. 8180 20.8 12.9 161 35.3 21.8 162
STEEL CREEK PARK 10100 20.8 17.9 116 19.9 16.8 118
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Basin wide percent of average 162 122
UPPER BEAR RIVER
BUG LAKE 7950 31.3 13.5 232 34.5 23.0 150
HAYDEN FORK 9400 12.7 4.1 310 29.9 23.6 127
KELLEY R.S. 8180 20.8 12.9 161 35.3 21.8 162
LILY LAKE 9050 12.8 7.4 173 23.7 18.6 127
MONTE CRISTO 8960 39.5 24.4 162 39.4 31.0 127
SALT RIVER SUMMIT 7600 17.5 6.2 282 26.8 19.6 137
TRIAL LAKE 9960 36.9 22.7 163 38.9 29.0 134
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Basin wide percent of average 188 137
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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.