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 FRIDAY: APRIL 25 , 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 27.8 12.7 219 37.6 24.7 152
COTTONWOOD CREEK 7600 31.5 21.2 149 36.4 27.7 131
GRANITE CREEK 6770 26.0 14.7 177 34.5 26.2 132
GRASSY LAKE 7265 46.4 35.4 131 58.2 41.1 142
GROS VENTRE SUMMIT 8775 23.3 14.7 159 22.5 17.7 127
LEWIS LAKE DIVIDE 7860 51.5 35.3 146 60.8 41.8 145
PHILLIPS BENCH 8200 41.1 30.0 137 49.2 33.0 149
SALT RIVER SUMMIT 7600 20.8 11.9 175 25.5 18.8 136
SNAKE RIVER STATION 6920 23.8 17.2 138 38.8 28.9 134
SPRING CREEK DIVIDE 9000 40.7 29.5 138 35.6 30.3 117
THUMB DIVIDE 7980 31.3 16.0 196 35.2 23.1 152
TOGWOTEE PASS 9580 36.5 27.8 131 36.7 31.3 117
TWO OCEAN PLATEAU 9360 48.3 27.2 178 -M 34.0 *
WILLOW CREEK 8450 42.5 31.8 134 47.1 35.5 133
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Basin wide percent of average 151 136
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.8 * 32.2 20.6 156
BLACK BEAR 7950 -M 40.0 * -M 45.5 *
CANYON 7940 22.3 11.9 187 -M 15.9 *
FISHER CREEK 9100 58.8 38.4 153 -M 41.2 *
MADISON PLATEAU 7750 44.2 24.5 180 44.3 29.3 151
NORTHEAST ENTRANCE 7350 9.8 7.1 138 21.2 13.5 157
PARKER PEAK 9400 34.7 23.5 148 -M 17.7 *
SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161
THUMB DIVIDE 7980 31.3 16.0 196 35.2 23.1 152
TWO OCEAN PLATEAU 9360 48.3 27.2 178 -M 34.0 *
WHISKEY CREEK 6800 24.1 16.3 148 33.5 24.4 137
WHITE MILL 8700 40.9 26.1 157 -M 31.8 *
WOLVERINE 7650 12.5 9.5 132 16.9 14.7 115
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Basin wide percent of average 160 148
WIND RIVER
BURROUGHS CREEK 8750 24.6 13.8 178 27.8 18.9 147
CHRISTINA LAKE 9980 22.3 17.5 127 -M 19.4 *
COLD SPRINGS 9630 -M 7.5 * -M 12.6 *
HOBBS PARK 10100 -M 17.4 * 17.8 16.7 107
LITTLE WARM 9620 -M 11.6 * 23.2 15.7 148
SOUTH PASS 9040 -M 17.9 * -M 19.9 *
ST. LAWRENCE ALT 8620 -M 6.0 * -M 12.0 *
TOGWOTEE PASS 9580 36.5 27.8 131 36.7 31.3 117
TOWNSEND CREEK 8700 -M 9.8 * -M 14.9 *
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Basin wide percent of average 141* 128*
BIGHORN BASIN
BALD MTN. 9375 24.5 23.4 105 20.7 20.1 103
BEAR TRAP MEADOW 7900 5.9 5.2 113 11.3 10.1 112
BLACKWATER 9780 41.4 25.3 164 32.2 20.1 160
BONE SPRINGS DIV 9350 20.8 18.3 114 19.5 17.5 111
EVENING STAR 9200 43.7 30.2 145 43.4 25.3 172
GRAVE SPRINGS 8550 12.9 -M * 13.2 11.8 112
KIRWIN 9550 16.9 11.5 147 18.3 12.8 143
LOST CREEK 8080 19.1 15.6 122 18.1 14.4 126
MARQUETTE 8760 13.2 8.6 153 14.2 12.7 112
MIDDLE POWDER 7760 18.7 14.4 130 16.8 14.2 118
OWL CREEK 8975 7.4 3.9 190 8.0 7.7 104
POWDER RIVER PASS 9480 -M 10.9 * 15.6 14.1 111
SHELL CREEK 9580 19.8 16.7 119 16.9 15.3 110
SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161
SYLVAN ROAD 8120 17.8 9.0 198 28.6 18.1 158
TIMBER CREEK 7950 7.0 6.2 113 9.7 9.4 103
YOUNTS PEAK 8350 24.6 18.3 134 -M 18.8 *
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Basin wide percent of average 136 131
SHOSHONE RIVER
BLACKWATER 9780 41.4 25.3 164 32.2 20.1 160
EVENING STAR 9200 43.7 30.2 145 43.4 25.3 172
KIRWIN 9550 16.9 11.5 147 18.3 12.8 143
MARQUETTE 8760 13.2 8.6 153 14.2 12.7 112
SYLVAN LAKE 8420 31.5 23.8 132 34.9 21.7 161
SYLVAN ROAD 8120 17.8 9.0 198 28.6 18.1 158
YOUNTS PEAK 8350 24.6 18.3 134 -M 18.8 *
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Basin wide percent of average 149 155
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.9 5.2 113 11.3 10.1 112
BONE SPRINGS DIV 9350 20.8 18.3 114 19.5 17.5 111
BURGESS JUNCTION 7880 16.0 13.3 120 16.0 13.8 116
CLOUD PEAK RESERVOIR 9860 20.4 17.4 117 18.1 16.3 111
DOME LAKE 8880 15.4 14.9 103 16.9 15.8 107
GRAVE SPRINGS 8550 12.9 -M * 13.2 11.8 112
HANSEN SAWMILL 8760 5.6 7.2 78 10.0 9.8 102
LOST CREEK 8080 19.1 15.6 122 18.1 14.4 126
MIDDLE POWDER 7760 18.7 14.4 130 16.8 14.2 118
POWDER RIVER PASS 9480 -M 10.9 * 15.6 14.1 111
SUCKER CREEK 8880 17.3 13.6 127 18.4 15.8 116
TIE CREEK 6870 6.8 -M * 14.9 13.2 113
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Basin wide percent of average 116 113
BELLE FOURCHE
BLIND PARK 6890 8.3 10.3 81 17.8 13.0 137
NORTH RAPID CREEK 6130 10.7 -M * 16.3 -M *
WARREN PEAK 6520 20.3 10.3 197 -M 9.8 *
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Basin wide percent of average 139 137*
UPPER N. PLATTE RIVER
COLUMBINE 9400 28.8 23.0 125 35.3 27.4 129
DIVIDE PEAK 8800 27.6 20.2 137 27.1 26.4 103
ELK RIVER 8700 27.4 17.8 154 28.3 21.5 132
JOE WRIGHT 10120 32.4 24.5 132 34.2 29.2 117
NORTH FRENCH CREEK 10100 38.0 28.9 131 32.7 27.1 121
OLD BATTLE 10000 44.5 37.3 119 41.8 34.6 121
SOUTH BRUSH CREEK 8400 11.7 11.5 102 19.4 19.7 98
TOWER 10500 59.2 50.3 118 54.5 41.8 130
WEBBER SPRINGS 9200 32.0 27.0 119 39.0 29.5 132
WILLOW CREEK PASS 9540 22.7 13.5 168 18.3 14.8 124
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Basin wide percent of average 128 122
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.5 28.9 140 32.2 22.9 141
CASPER MTN. 7900 23.5 18.3 128 23.1 17.8 130
CHRISTINA LAKE 9980 22.3 17.5 127 -M 19.4 *
DEADMAN HILL 10220 21.8 18.6 117 22.4 20.2 111
LAPRELE CREEK 8320 13.8 7.7 179 16.3 14.1 116
RENO HILL 8400 24.3 14.2 171 23.2 21.8 106
ROACH 9700 25.7 18.1 142 25.2 24.9 101
SAND LAKE 10080 42.9 36.6 117 33.6 23.9 141
SOUTH PASS 9040 -M 17.9 * -M 19.9 *
WINDY PEAK 7840 8.5 8.4 101 13.3 11.7 114
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Basin wide percent of average 133 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 9.2 7.1 130 30.3 17.9 169
DIVIDE PEAK 8800 27.6 20.2 137 27.1 26.4 103
OLD BATTLE 10000 44.5 37.3 119 41.8 34.6 121
SANDSTONE RS 8150 15.2 11.9 128 23.5 22.1 106
WHISKEY PARK 8950 41.0 30.0 137 36.7 32.8 112
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Basin wide percent of average 129 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 18.9 14.5 130 18.2 18.1 101
BLIND BULL SUM 8650 43.1 25.8 167 35.3 26.4 134
EAST RIM DIVIDE 7930 17.1 14.9 115 18.2 16.9 108
ELKHART PARK G.S. 9400 18.7 14.4 130 19.5 17.8 110
GROS VENTRE SUMMIT 8775 23.3 14.7 159 22.5 17.7 127
KENDALL R.S. 7740 20.4 11.5 177 24.6 17.3 142
LOOMIS PARK 8240 -M 15.8 * 28.5 21.0 136
NEW FORK LAKE 8340 13.4 9.7 138 14.0 16.1 87
SNIDER BASIN 8250 22.0 13.9 158 21.1 16.9 125
SPRING CREEK DIVIDE 9000 40.7 29.5 138 35.6 30.3 117
TRIPLE PEAK 8500 34.8 25.7 135 41.7 34.3 122
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Basin wide percent of average 145 120
LOWER GREEN RIVER
HAMS FORK 7840 13.8 5.7 242 17.8 14.9 119
HEWINTA 9500 10.0 6.7 149 16.0 15.7 102
HICKERSON PARK 9150 11.7 4.3 272 12.0 11.7 103
HOLE-IN-ROCK 9150 9.6 3.8 253 12.3 11.7 105
INDIAN CREEK 9425 42.3 29.5 143 34.8 28.7 121
KELLEY R.S. 8180 23.4 16.0 146 32.7 20.9 156
STEEL CREEK PARK 10100 18.8 18.5 102 18.3 15.4 119
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Basin wide percent of average 153 121
UPPER BEAR RIVER
BUG LAKE 7950 34.2 17.5 195 32.8 22.0 149
HAYDEN FORK 9400 15.7 8.2 191 27.6 22.2 124
KELLEY R.S. 8180 23.4 16.0 146 32.7 20.9 156
LILY LAKE 9050 17.4 10.3 169 21.7 17.4 125
MONTE CRISTO 8960 41.2 27.4 150 36.0 29.4 122
SALT RIVER SUMMIT 7600 20.8 11.9 175 25.5 18.8 136
TRIAL LAKE 9960 36.9 24.8 149 36.6 27.4 134
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Basin wide percent of average 163 135
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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.