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 THURSDAY: MAY 1 , 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 26.1 10.7 244 38.6 25.2 153
COTTONWOOD CREEK 7600 32.0 20.0 160 38.6 28.2 137
GRANITE CREEK 6770 25.5 12.9 198 35.5 26.8 132
GRASSY LAKE 7265 47.8 33.9 141 60.5 41.9 144
GROS VENTRE SUMMIT 8775 23.2 13.9 167 22.9 18.1 127
LEWIS LAKE DIVIDE 7860 54.8 34.4 159 63.2 42.6 148
PHILLIPS BENCH 8200 42.7 29.5 145 50.3 33.6 150
SALT RIVER SUMMIT 7600 20.2 10.8 187 26.5 19.2 138
SNAKE RIVER STATION 6920 22.1 16.4 135 40.3 29.4 137
SPRING CREEK DIVIDE 9000 41.0 29.6 139 37.0 30.8 120
THUMB DIVIDE 7980 29.8 15.1 197 36.8 23.6 156
TOGWOTEE PASS 9580 37.4 28.3 132 38.2 31.9 120
TWO OCEAN PLATEAU 9360 50.1 27.6 182 -M 34.7 *
WILLOW CREEK 8450 43.9 31.9 138 51.9 36.2 143
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Basin wide percent of average 158 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 26.0 * 34.1 21.2 161
BLACK BEAR 7950 -M 39.8 * -M 46.5 *
CANYON 7940 22.0 10.9 202 -M 16.3 *
FISHER CREEK 9100 60.4 38.7 156 -M 42.2 *
MADISON PLATEAU 7750 42.7 23.8 179 45.8 29.9 153
NORTHEAST ENTRANCE 7350 8.6 5.9 146 22.5 13.9 162
PARKER PEAK 9400 36.8 23.7 155 -M 18.2 *
SYLVAN LAKE 8420 32.2 23.8 135 36.5 22.3 164
THUMB DIVIDE 7980 29.8 15.1 197 36.8 23.6 156
TWO OCEAN PLATEAU 9360 50.1 27.6 182 -M 34.7 *
WHISKEY CREEK 6800 22.8 15.2 150 34.6 24.9 139
WHITE MILL 8700 42.5 26.3 162 -M 32.6 *
WOLVERINE 7650 12.5 8.1 154 18.0 15.2 118
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Basin wide percent of average 164 151
WIND RIVER
BURROUGHS CREEK 8750 24.2 12.9 188 28.6 19.4 147
CHRISTINA LAKE 9980 22.4 18.0 124 27.0 20.1 134
COLD SPRINGS 9630 9.1 6.8 134 16.2 13.1 124
HOBBS PARK 10100 22.0 18.0 122 18.3 17.3 106
LITTLE WARM 9620 19.5 10.4 188 23.9 16.3 147
SOUTH PASS 9040 27.7 18.1 153 29.2 20.6 142
ST. LAWRENCE ALT 8620 11.0 5.4 204 15.4 12.5 123
TOGWOTEE PASS 9580 37.4 28.3 132 38.2 31.9 120
TOWNSEND CREEK 8700 12.7 9.5 134 17.5 15.5 113
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Basin wide percent of average 146 129
BIGHORN BASIN
BALD MTN. 9375 25.9 24.1 107 21.8 20.8 105
BEAR TRAP MEADOW 7900 5.0 4.2 119 12.0 10.6 113
BLACKWATER 9780 42.8 25.7 167 33.2 20.6 161
BONE SPRINGS DIV 9350 21.2 18.4 115 20.1 18.1 111
EVENING STAR 9200 -M 30.8 * 45.1 25.9 174
GRAVE SPRINGS 8550 13.1 -M * 14.2 12.4 115
KIRWIN 9550 17.3 11.7 148 19.0 13.3 143
LOST CREEK 8080 20.0 15.8 127 19.1 15.0 127
MARQUETTE 8760 14.2 8.6 165 15.2 13.5 113
MIDDLE POWDER 7760 18.4 14.8 124 17.8 14.8 120
OWL CREEK 8975 6.7 3.4 197 8.7 8.1 107
POWDER RIVER PASS 9480 -M 10.5 * 16.8 14.7 114
SHELL CREEK 9580 20.9 17.0 123 18.1 15.9 114
SYLVAN LAKE 8420 32.2 23.8 135 36.5 22.3 164
SYLVAN ROAD 8120 16.5 7.9 209 30.0 18.6 161
TIMBER CREEK 7950 7.2 6.0 120 11.0 10.0 110
YOUNTS PEAK 8350 24.7 18.3 135 -M 19.3 *
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Basin wide percent of average 137 133
SHOSHONE RIVER
BLACKWATER 9780 42.8 25.7 167 33.2 20.6 161
EVENING STAR 9200 -M 30.8 * 45.1 25.9 174
KIRWIN 9550 17.3 11.7 148 19.0 13.3 143
MARQUETTE 8760 14.2 8.6 165 15.2 13.5 113
SYLVAN LAKE 8420 32.2 23.8 135 36.5 22.3 164
SYLVAN ROAD 8120 16.5 7.9 209 30.0 18.6 161
YOUNTS PEAK 8350 24.7 18.3 135 -M 19.3 *
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Basin wide percent of average 154 157
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.0 4.2 119 12.0 10.6 113
BONE SPRINGS DIV 9350 21.2 18.4 115 20.1 18.1 111
BURGESS JUNCTION 7880 16.4 13.5 121 16.8 14.4 117
CLOUD PEAK RESERVOIR 9860 21.3 17.7 120 18.9 17.1 111
DOME LAKE 8880 15.8 15.0 105 17.9 16.4 109
GRAVE SPRINGS 8550 13.1 -M * 14.2 12.4 115
HANSEN SAWMILL 8760 5.8 6.9 84 10.8 10.3 105
LOST CREEK 8080 20.0 15.8 127 19.1 15.0 127
MIDDLE POWDER 7760 18.4 14.8 124 17.8 14.8 120
POWDER RIVER PASS 9480 -M 10.5 * 16.8 14.7 114
SUCKER CREEK 8880 18.3 13.8 133 19.4 16.5 118
TIE CREEK 6870 6.7 -M * 16.2 13.8 117
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Basin wide percent of average 118 115
BELLE FOURCHE
BLIND PARK 6890 6.8 9.6 71 18.2 13.8 132
NORTH RAPID CREEK 6130 9.4 -M * 16.9 -M *
WARREN PEAK 6520 19.9 9.6 207 -M 10.3 *
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Basin wide percent of average 139 132*
UPPER N. PLATTE RIVER
COLUMBINE 9400 28.6 22.1 129 37.1 28.1 132
DIVIDE PEAK 8800 26.7 19.3 138 28.9 27.3 106
ELK RIVER 8700 25.2 16.2 156 29.9 22.1 135
JOE WRIGHT 10120 35.0 24.7 142 36.5 30.3 120
NORTH FRENCH CREEK 10100 39.5 29.4 134 34.6 28.0 124
OLD BATTLE 10000 47.9 38.2 125 44.4 35.7 124
SOUTH BRUSH CREEK 8400 10.2 10.6 96 20.6 20.6 100
TOWER 10500 29.8 51.1 58 56.8 43.2 131
WEBBER SPRINGS 9200 33.9 26.0 130 41.2 30.6 135
WILLOW CREEK PASS 9540 24.1 13.5 179 19.5 15.4 127
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Basin wide percent of average 120 124
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.8 28.9 145 33.7 23.8 142
CASPER MTN. 7900 24.0 17.8 135 24.9 18.8 132
CHRISTINA LAKE 9980 22.4 18.0 124 27.0 20.1 134
DEADMAN HILL 10220 23.4 19.1 123 23.8 21.1 113
LAPRELE CREEK 8320 11.9 6.3 189 16.7 14.7 114
RENO HILL 8400 23.7 13.4 177 24.6 22.4 110
ROACH 9700 26.5 18.1 146 26.9 25.8 104
SAND LAKE 10080 45.2 37.2 122 35.2 24.8 142
SOUTH PASS 9040 27.7 18.1 153 29.2 20.6 142
WINDY PEAK 7840 6.1 7.9 77 13.6 12.2 111
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Basin wide percent of average 137 125
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.1 4.8 106 31.1 18.5 168
DIVIDE PEAK 8800 26.7 19.3 138 28.9 27.3 106
OLD BATTLE 10000 47.9 38.2 125 44.4 35.7 124
SANDSTONE RS 8150 12.5 9.8 128 25.1 23.0 109
WHISKEY PARK 8950 44.0 29.6 149 39.4 34.0 116
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Basin wide percent of average 134 122
UPPER GREEN RIVER
BIG SANDY OPENING 9100 18.1 13.9 130 19.1 18.5 103
BLIND BULL SUM 8650 44.0 22.7 194 36.5 26.9 136
EAST RIM DIVIDE 7930 16.4 14.8 111 18.7 17.3 108
ELKHART PARK G.S. 9400 18.6 14.0 133 20.4 18.2 112
GROS VENTRE SUMMIT 8775 23.2 13.9 167 22.9 18.1 127
KENDALL R.S. 7740 19.2 10.6 181 25.1 17.6 143
LOOMIS PARK 8240 -M 15.1 * 29.5 21.4 138
NEW FORK LAKE 8340 12.0 9.1 132 14.4 16.4 88
SNIDER BASIN 8250 21.2 13.0 163 21.8 17.2 127
SPRING CREEK DIVIDE 9000 41.0 29.6 139 37.0 30.8 120
TRIPLE PEAK 8500 35.0 25.0 140 43.4 35.0 124
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Basin wide percent of average 149 122
LOWER GREEN RIVER
HAMS FORK 7840 12.9 5.7 226 18.8 15.2 124
HEWINTA 9500 8.6 5.3 162 16.8 16.3 103
HICKERSON PARK 9150 9.4 2.9 324 12.4 12.3 101
HOLE-IN-ROCK 9150 8.0 2.3 348 12.7 12.3 103
INDIAN CREEK 9425 43.6 28.9 151 36.5 29.2 125
KELLEY R.S. 8180 22.8 15.0 152 34.8 21.3 163
STEEL CREEK PARK 10100 20.4 18.9 108 19.4 16.1 120
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Basin wide percent of average 159 123
UPPER BEAR RIVER
BUG LAKE 7950 34.3 16.0 214 34.2 22.6 151
HAYDEN FORK 9400 15.0 6.6 227 29.4 23.0 128
KELLEY R.S. 8180 22.8 15.0 152 34.8 21.3 163
LILY LAKE 9050 16.1 8.7 185 23.1 18.0 128
MONTE CRISTO 8960 42.5 26.2 162 39.1 30.3 129
SALT RIVER SUMMIT 7600 20.2 10.8 187 26.5 19.2 138
TRIAL LAKE 9960 36.9 24.0 154 36.6 28.3 129
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Basin wide percent of average 175 137
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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.