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: APRIL 30 , 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 25.8 11.0 235 38.4 25.1 153
COTTONWOOD CREEK 7600 31.5 20.2 156 38.2 28.1 136
GRANITE CREEK 6770 25.0 13.2 189 35.2 26.7 132
GRASSY LAKE 7265 47.0 34.1 138 59.8 41.8 143
GROS VENTRE SUMMIT 8775 23.2 14.0 166 22.7 18.0 126
LEWIS LAKE DIVIDE 7860 53.8 34.6 155 62.6 42.5 147
PHILLIPS BENCH 8200 42.2 29.6 143 50.0 33.5 149
SALT RIVER SUMMIT 7600 19.9 11.0 181 26.2 19.1 137
SNAKE RIVER STATION 6920 21.9 16.5 133 40.0 29.3 137
SPRING CREEK DIVIDE 9000 39.9 29.6 135 36.5 30.7 119
THUMB DIVIDE 7980 29.3 15.2 193 36.4 23.5 155
TOGWOTEE PASS 9580 37.1 28.2 132 37.9 31.8 119
TWO OCEAN PLATEAU 9360 49.6 27.5 180 -M 34.6 *
WILLOW CREEK 8450 42.9 31.9 134 51.1 36.1 142
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Basin wide percent of average 154 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 26.0 * 33.7 21.1 160
BLACK BEAR 7950 -M 39.8 * -M 46.3 *
CANYON 7940 21.4 11.1 193 -M 16.2 *
FISHER CREEK 9100 59.9 38.7 155 -M 42.0 *
MADISON PLATEAU 7750 41.9 23.9 175 45.0 29.8 151
NORTHEAST ENTRANCE 7350 8.4 6.1 138 22.1 13.8 160
PARKER PEAK 9400 36.0 23.7 152 -M 18.1 *
SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163
THUMB DIVIDE 7980 29.3 15.2 193 36.4 23.5 155
TWO OCEAN PLATEAU 9360 49.6 27.5 180 -M 34.6 *
WHISKEY CREEK 6800 22.1 15.4 144 33.9 24.8 137
WHITE MILL 8700 42.0 26.3 160 -M 32.5 *
WOLVERINE 7650 12.1 8.3 146 17.7 15.1 117
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Basin wide percent of average 161 150
WIND RIVER
BURROUGHS CREEK 8750 23.9 13.1 182 28.3 19.3 147
CHRISTINA LAKE 9980 21.9 17.9 122 26.8 20.0 134
COLD SPRINGS 9630 8.8 6.9 128 16.2 13.0 125
HOBBS PARK 10100 21.7 17.9 121 18.2 17.2 106
LITTLE WARM 9620 19.3 10.6 182 23.6 16.2 146
SOUTH PASS 9040 27.6 18.1 152 29.1 20.5 142
ST. LAWRENCE ALT 8620 11.0 5.5 200 15.3 12.4 123
TOGWOTEE PASS 9580 37.1 28.2 132 37.9 31.8 119
TOWNSEND CREEK 8700 12.7 9.6 132 17.2 15.4 112
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Basin wide percent of average 144 128
BIGHORN BASIN
BALD MTN. 9375 25.4 24.0 106 21.6 20.7 104
BEAR TRAP MEADOW 7900 5.0 4.4 114 11.9 10.5 113
BLACKWATER 9780 42.4 25.6 166 33.1 20.5 161
BONE SPRINGS DIV 9350 20.8 18.4 113 20.0 18.0 111
EVENING STAR 9200 44.5 30.7 145 44.7 25.8 173
GRAVE SPRINGS 8550 13.1 -M * 14.2 12.3 115
KIRWIN 9550 17.1 11.7 146 18.9 13.2 143
LOST CREEK 8080 19.9 15.8 126 19.0 14.9 128
MARQUETTE 8760 14.1 8.6 164 14.8 13.4 110
MIDDLE POWDER 7760 18.3 14.7 124 17.7 14.7 120
OWL CREEK 8975 6.8 3.5 194 8.6 8.0 108
POWDER RIVER PASS 9480 -M 10.6 * 16.6 14.6 114
SHELL CREEK 9580 20.7 17.0 122 18.0 15.8 114
SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163
SYLVAN ROAD 8120 16.5 8.1 204 29.8 18.5 161
TIMBER CREEK 7950 7.3 6.0 122 11.0 9.9 111
YOUNTS PEAK 8350 24.5 18.3 134 -M 19.2 *
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Basin wide percent of average 137 133
SHOSHONE RIVER
BLACKWATER 9780 42.4 25.6 166 33.1 20.5 161
EVENING STAR 9200 44.5 30.7 145 44.7 25.8 173
KIRWIN 9550 17.1 11.7 146 18.9 13.2 143
MARQUETTE 8760 14.1 8.6 164 14.8 13.4 110
SYLVAN LAKE 8420 31.8 23.8 134 36.2 22.2 163
SYLVAN ROAD 8120 16.5 8.1 204 29.8 18.5 161
YOUNTS PEAK 8350 24.5 18.3 134 -M 19.2 *
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Basin wide percent of average 151 156
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.0 4.4 114 11.9 10.5 113
BONE SPRINGS DIV 9350 20.8 18.4 113 20.0 18.0 111
BURGESS JUNCTION 7880 16.2 13.5 120 16.4 14.3 115
CLOUD PEAK RESERVOIR 9860 21.1 17.6 120 18.8 17.0 111
DOME LAKE 8880 15.7 15.0 105 17.9 16.3 110
GRAVE SPRINGS 8550 13.1 -M * 14.2 12.3 115
HANSEN SAWMILL 8760 5.9 6.9 86 10.8 10.2 106
LOST CREEK 8080 19.9 15.8 126 19.0 14.9 128
MIDDLE POWDER 7760 18.3 14.7 124 17.7 14.7 120
POWDER RIVER PASS 9480 -M 10.6 * 16.6 14.6 114
SUCKER CREEK 8880 18.2 13.8 132 19.1 16.4 116
TIE CREEK 6870 6.7 -M * 15.9 13.7 116
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Basin wide percent of average 117 115
BELLE FOURCHE
BLIND PARK 6890 6.7 9.7 69 18.1 13.7 132
NORTH RAPID CREEK 6130 9.5 -M * 16.9 -M *
WARREN PEAK 6520 19.8 9.7 204 -M 10.2 *
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Basin wide percent of average 137 132*
UPPER N. PLATTE RIVER
COLUMBINE 9400 28.4 22.2 128 36.8 28.0 131
DIVIDE PEAK 8800 26.5 19.5 136 28.5 27.2 105
ELK RIVER 8700 25.1 16.5 152 29.5 22.0 134
JOE WRIGHT 10120 34.5 24.7 140 35.9 30.1 119
NORTH FRENCH CREEK 10100 39.1 29.3 133 34.4 27.9 123
OLD BATTLE 10000 47.3 38.1 124 44.1 35.5 124
SOUTH BRUSH CREEK 8400 10.3 10.8 95 20.4 20.5 100
TOWER 10500 29.3 51.0 57 56.6 43.0 132
WEBBER SPRINGS 9200 33.4 26.2 127 40.8 30.4 134
WILLOW CREEK PASS 9540 23.9 13.5 177 19.4 15.3 127
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Basin wide percent of average 118 124
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.5 28.9 144 33.4 23.7 141
CASPER MTN. 7900 23.9 17.9 134 24.6 18.6 132
CHRISTINA LAKE 9980 21.9 17.9 122 26.8 20.0 134
DEADMAN HILL 10220 23.1 19.0 122 23.6 21.0 112
LAPRELE CREEK 8320 11.7 6.5 180 16.5 14.6 113
RENO HILL 8400 23.5 13.5 174 24.3 22.3 109
ROACH 9700 26.8 18.1 148 26.8 25.6 105
SAND LAKE 10080 44.8 37.1 121 35.0 24.7 142
SOUTH PASS 9040 27.6 18.1 152 29.1 20.5 142
WINDY PEAK 7840 6.2 8.0 78 13.3 12.1 110
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Basin wide percent of average 136 125
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.4 5.2 104 30.7 18.4 167
DIVIDE PEAK 8800 26.5 19.5 136 28.5 27.2 105
OLD BATTLE 10000 47.3 38.1 124 44.1 35.5 124
SANDSTONE RS 8150 12.5 10.1 124 24.9 22.9 109
WHISKEY PARK 8950 43.9 29.7 148 39.0 33.8 115
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Basin wide percent of average 132 121
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.7 14.0 126 18.8 18.4 102
BLIND BULL SUM 8650 42.9 23.2 185 35.7 26.8 133
EAST RIM DIVIDE 7930 16.2 14.8 109 18.5 17.2 108
ELKHART PARK G.S. 9400 18.1 14.1 128 20.2 18.1 112
GROS VENTRE SUMMIT 8775 23.2 14.0 166 22.7 18.0 126
KENDALL R.S. 7740 18.8 10.8 174 24.7 17.5 141
LOOMIS PARK 8240 -M 15.2 * 29.3 21.3 138
NEW FORK LAKE 8340 11.8 9.2 128 14.2 16.3 87
SNIDER BASIN 8250 21.1 13.2 160 21.6 17.1 126
SPRING CREEK DIVIDE 9000 39.9 29.6 135 36.5 30.7 119
TRIPLE PEAK 8500 34.0 25.1 135 42.8 34.9 123
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Basin wide percent of average 145 121
LOWER GREEN RIVER
HAMS FORK 7840 12.8 5.7 225 18.7 15.2 123
HEWINTA 9500 8.6 5.5 156 16.8 16.2 104
HICKERSON PARK 9150 9.7 3.1 313 12.2 12.2 100
HOLE-IN-ROCK 9150 8.1 2.5 324 12.7 12.2 104
INDIAN CREEK 9425 43.0 29.0 148 36.2 29.1 124
KELLEY R.S. 8180 22.6 15.2 149 34.5 21.2 163
STEEL CREEK PARK 10100 20.0 18.8 106 19.2 16.0 120
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Basin wide percent of average 156 123
UPPER BEAR RIVER
BUG LAKE 7950 33.5 16.2 207 33.6 22.5 149
HAYDEN FORK 9400 14.6 6.9 212 29.0 22.9 127
KELLEY R.S. 8180 22.6 15.2 149 34.5 21.2 163
LILY LAKE 9050 15.5 9.0 172 22.9 17.9 128
MONTE CRISTO 8960 41.0 26.4 155 38.3 30.1 127
SALT RIVER SUMMIT 7600 19.9 11.0 181 26.2 19.1 137
TRIAL LAKE 9960 36.9 24.1 153 36.7 28.2 130
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Basin wide percent of average 169 137
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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.