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: APRIL 29 , 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 25.6 11.4 225 37.7 25.0 151
COTTONWOOD CREEK 7600 30.6 20.4 150 36.9 28.0 132
GRANITE CREEK 6770 24.7 13.5 183 34.7 26.6 130
GRASSY LAKE 7265 46.7 34.4 136 59.2 41.6 142
GROS VENTRE SUMMIT 8775 23.1 14.2 163 22.6 18.0 126
LEWIS LAKE DIVIDE 7860 54.1 34.7 156 62.3 42.3 147
PHILLIPS BENCH 8200 41.8 29.7 141 49.5 33.4 148
SALT RIVER SUMMIT 7600 19.8 11.2 177 25.7 19.1 135
SNAKE RIVER STATION 6920 22.0 16.7 132 39.5 29.2 135
SPRING CREEK DIVIDE 9000 38.7 29.6 131 35.9 30.6 117
THUMB DIVIDE 7980 29.2 15.4 190 36.2 23.4 155
TOGWOTEE PASS 9580 36.4 28.1 130 37.2 31.7 117
TWO OCEAN PLATEAU 9360 49.2 27.5 179 -M 34.5 *
WILLOW CREEK 8450 41.5 31.9 130 49.3 36.0 137
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Basin wide percent of average 152 137
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.9 * 33.6 21.0 160
BLACK BEAR 7950 -M 39.9 * -M 46.2 *
CANYON 7940 21.2 11.2 189 -M 16.2 *
FISHER CREEK 9100 59.5 38.6 154 -M 41.9 *
MADISON PLATEAU 7750 42.2 24.0 176 44.8 29.7 151
NORTHEAST ENTRANCE 7350 8.4 6.3 133 21.7 13.8 157
PARKER PEAK 9400 35.4 23.6 150 -M 18.0 *
SYLVAN LAKE 8420 31.7 23.8 133 35.9 22.1 162
THUMB DIVIDE 7980 29.2 15.4 190 36.2 23.4 155
TWO OCEAN PLATEAU 9360 49.2 27.5 179 -M 34.5 *
WHISKEY CREEK 6800 22.4 15.6 144 33.8 24.7 137
WHITE MILL 8700 41.7 26.2 159 -M 32.3 *
WOLVERINE 7650 12.0 8.6 140 17.5 15.0 117
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Basin wide percent of average 160 149
WIND RIVER
BURROUGHS CREEK 8750 23.6 13.2 179 28.0 19.2 146
CHRISTINA LAKE 9980 21.3 17.8 120 26.7 19.9 134
COLD SPRINGS 9630 8.5 7.0 121 16.0 12.9 124
HOBBS PARK 10100 21.4 17.8 120 17.9 17.1 105
LITTLE WARM 9620 19.1 10.8 177 23.3 16.1 145
SOUTH PASS 9040 27.3 18.0 152 28.7 20.4 141
ST. LAWRENCE ALT 8620 10.4 5.6 186 14.9 12.3 121
TOGWOTEE PASS 9580 36.4 28.1 130 37.2 31.7 117
TOWNSEND CREEK 8700 12.5 9.6 130 17.1 15.3 112
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Basin wide percent of average 141 127
BIGHORN BASIN
BALD MTN. 9375 24.9 23.9 104 21.1 20.6 102
BEAR TRAP MEADOW 7900 4.8 4.5 107 11.6 10.4 112
BLACKWATER 9780 42.0 25.6 164 32.7 20.4 160
BONE SPRINGS DIV 9350 20.2 18.4 110 19.6 17.9 109
EVENING STAR 9200 44.6 30.6 146 44.2 25.7 172
GRAVE SPRINGS 8550 12.6 -M * 13.6 12.2 111
KIRWIN 9550 16.9 11.6 146 18.5 13.1 141
LOST CREEK 8080 19.7 15.7 125 18.6 14.8 126
MARQUETTE 8760 13.5 8.6 157 14.5 13.2 110
MIDDLE POWDER 7760 17.9 14.7 122 17.3 14.6 118
OWL CREEK 8975 6.3 3.6 175 8.2 8.0 102
POWDER RIVER PASS 9480 -M 10.6 * 16.1 14.5 111
SHELL CREEK 9580 20.4 16.9 121 17.5 15.7 111
SYLVAN LAKE 8420 31.7 23.8 133 35.9 22.1 162
SYLVAN ROAD 8120 16.0 8.3 193 29.4 18.4 160
TIMBER CREEK 7950 6.9 6.1 113 10.3 9.8 105
YOUNTS PEAK 8350 24.2 18.3 132 -M 19.1 *
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Basin wide percent of average 134 131
SHOSHONE RIVER
BLACKWATER 9780 42.0 25.6 164 32.7 20.4 160
EVENING STAR 9200 44.6 30.6 146 44.2 25.7 172
KIRWIN 9550 16.9 11.6 146 18.5 13.1 141
MARQUETTE 8760 13.5 8.6 157 14.5 13.2 110
SYLVAN LAKE 8420 31.7 23.8 133 35.9 22.1 162
SYLVAN ROAD 8120 16.0 8.3 193 29.4 18.4 160
YOUNTS PEAK 8350 24.2 18.3 132 -M 19.1 *
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Basin wide percent of average 149 155
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.8 4.5 107 11.6 10.4 112
BONE SPRINGS DIV 9350 20.2 18.4 110 19.6 17.9 109
BURGESS JUNCTION 7880 15.9 13.4 119 16.2 14.2 114
CLOUD PEAK RESERVOIR 9860 20.7 17.6 118 18.4 16.8 110
DOME LAKE 8880 15.2 15.0 101 17.2 16.2 106
GRAVE SPRINGS 8550 12.6 -M * 13.6 12.2 111
HANSEN SAWMILL 8760 5.5 7.0 79 10.3 10.1 102
LOST CREEK 8080 19.7 15.7 125 18.6 14.8 126
MIDDLE POWDER 7760 17.9 14.7 122 17.3 14.6 118
POWDER RIVER PASS 9480 -M 10.6 * 16.1 14.5 111
SUCKER CREEK 8880 17.6 13.7 128 18.9 16.3 116
TIE CREEK 6870 6.2 -M * 15.3 13.6 113
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Basin wide percent of average 115 113
BELLE FOURCHE
BLIND PARK 6890 6.3 9.8 64 17.9 13.5 133
NORTH RAPID CREEK 6130 -M -M * -M -M *
WARREN PEAK 6520 20.0 9.8 204 -M 10.1 *
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Basin wide percent of average 134 133*
UPPER N. PLATTE RIVER
COLUMBINE 9400 27.8 22.4 124 36.1 27.9 129
DIVIDE PEAK 8800 26.5 19.6 135 27.9 27.0 103
ELK RIVER 8700 24.3 16.7 146 28.6 21.9 131
JOE WRIGHT 10120 33.4 24.6 136 35.0 29.9 117
NORTH FRENCH CREEK 10100 38.6 29.2 132 33.5 27.7 121
OLD BATTLE 10000 45.9 37.9 121 43.3 35.3 123
SOUTH BRUSH CREEK 8400 10.0 10.9 92 19.8 20.3 98
TOWER 10500 28.3 50.8 56 55.2 42.7 129
WEBBER SPRINGS 9200 32.6 26.3 124 39.9 30.2 132
WILLOW CREEK PASS 9540 23.4 13.5 173 19.0 15.2 125
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Basin wide percent of average 115 122
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.7 28.9 141 32.7 23.5 139
CASPER MTN. 7900 23.8 18.0 132 24.2 18.5 131
CHRISTINA LAKE 9980 21.3 17.8 120 26.7 19.9 134
DEADMAN HILL 10220 22.3 18.9 118 22.9 20.8 110
LAPRELE CREEK 8320 11.7 6.8 172 16.4 14.5 113
RENO HILL 8400 23.1 13.7 169 23.9 22.2 108
ROACH 9700 26.0 18.1 144 26.0 25.5 102
SAND LAKE 10080 43.7 37.0 118 34.2 24.5 140
SOUTH PASS 9040 27.3 18.0 152 28.7 20.4 141
WINDY PEAK 7840 6.3 8.1 78 13.5 12.0 112
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Basin wide percent of average 133 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.3 5.6 95 30.7 18.3 168
DIVIDE PEAK 8800 26.5 19.6 135 27.9 27.0 103
OLD BATTLE 10000 45.9 37.9 121 43.3 35.3 123
SANDSTONE RS 8150 12.2 10.5 116 24.3 22.7 107
WHISKEY PARK 8950 42.7 29.7 144 37.7 33.6 112
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Basin wide percent of average 128 120
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.5 14.1 124 18.4 18.4 100
BLIND BULL SUM 8650 43.0 23.7 181 35.5 26.7 133
EAST RIM DIVIDE 7930 16.1 14.8 109 18.3 17.2 106
ELKHART PARK G.S. 9400 17.8 14.1 126 19.6 18.1 108
GROS VENTRE SUMMIT 8775 23.1 14.2 163 22.6 18.0 126
KENDALL R.S. 7740 18.7 10.9 172 24.6 17.5 141
LOOMIS PARK 8240 -M 15.3 * 28.9 21.3 136
NEW FORK LAKE 8340 11.7 9.3 126 14.1 16.3 87
SNIDER BASIN 8250 21.1 13.3 159 21.3 17.1 125
SPRING CREEK DIVIDE 9000 38.7 29.6 131 35.9 30.6 117
TRIPLE PEAK 8500 34.4 25.2 137 42.4 34.8 122
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Basin wide percent of average 143 119
LOWER GREEN RIVER
HAMS FORK 7840 12.5 5.7 219 18.2 15.1 121
HEWINTA 9500 8.2 5.8 141 16.2 16.1 101
HICKERSON PARK 9150 9.4 3.4 276 12.1 12.1 100
HOLE-IN-ROCK 9150 7.9 2.8 282 12.4 12.1 102
INDIAN CREEK 9425 42.6 29.1 146 35.3 29.0 122
KELLEY R.S. 8180 21.8 15.3 142 33.5 21.2 158
STEEL CREEK PARK 10100 19.4 18.8 103 18.7 15.9 118
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Basin wide percent of average 151 120
UPPER BEAR RIVER
BUG LAKE 7950 32.8 16.5 199 33.3 22.4 149
HAYDEN FORK 9400 14.0 7.1 197 28.3 22.7 125
KELLEY R.S. 8180 21.8 15.3 142 33.5 21.2 158
LILY LAKE 9050 14.5 9.2 158 22.2 17.8 125
MONTE CRISTO 8960 40.5 26.6 152 37.8 30.0 126
SALT RIVER SUMMIT 7600 19.8 11.2 177 25.7 19.1 135
TRIAL LAKE 9960 36.9 24.2 152 36.6 28.0 131
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Basin wide percent of average 164 135
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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.