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 MONDAY: MAY 12 , 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 17.9 6.1 293 39.1 26.2 149
COTTONWOOD CREEK 7600 26.5 15.3 173 39.6 29.2 136
GRANITE CREEK 6770 20.0 8.5 235 35.7 27.9 128
GRASSY LAKE 7265 40.2 28.6 141 61.3 43.5 141
GROS VENTRE SUMMIT 8775 19.4 10.9 178 23.2 18.8 123
LEWIS LAKE DIVIDE 7860 50.8 30.6 166 63.8 44.2 144
PHILLIPS BENCH 8200 39.3 26.2 150 51.0 34.8 147
SALT RIVER SUMMIT 7600 12.4 2.3 539 26.7 20.0 134
SNAKE RIVER STATION 6920 12.3 12.6 98 40.9 30.5 134
SPRING CREEK DIVIDE 9000 33.0 26.8 123 37.4 31.9 117
THUMB DIVIDE 7980 21.6 12.0 180 37.1 24.5 151
TOGWOTEE PASS 9580 37.1 26.5 140 39.9 33.1 121
TWO OCEAN PLATEAU 9360 44.5 26.6 167 -M 36.0 *
WILLOW CREEK 8450 39.9 28.7 139 53.5 37.5 143
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Basin wide percent of average 159 137
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.1 * 35.3 22.5 157
BLACK BEAR 7950 -M 37.6 * -M 48.0 *
CANYON 7940 16.7 7.4 226 29.6 17.2 172
FISHER CREEK 9100 56.3 37.7 149 -M 43.9 *
MADISON PLATEAU 7750 35.3 19.9 177 46.2 31.1 149
NORTHEAST ENTRANCE 7350 2.6 3.3 79 23.4 14.8 158
PARKER PEAK 9400 37.4 22.9 163 -M 19.4 *
SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157
THUMB DIVIDE 7980 21.6 12.0 180 37.1 24.5 151
TWO OCEAN PLATEAU 9360 44.5 26.6 167 -M 36.0 *
WHISKEY CREEK 6800 18.4 10.7 172 35.3 25.9 136
WHITE MILL 8700 41.1 25.2 163 -M 34.0 *
WOLVERINE 7650 5.5 4.1 134 19.0 16.2 117
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Basin wide percent of average 165 150
WIND RIVER
BURROUGHS CREEK 8750 20.4 8.2 249 28.9 20.5 141
CHRISTINA LAKE 9980 21.2 17.3 123 27.9 21.3 131
COLD SPRINGS 9630 5.3 3.7 143 16.6 14.2 117
HOBBS PARK 10100 21.1 17.1 123 19.6 18.6 105
LITTLE WARM 9620 14.4 6.5 222 24.4 17.4 140
SOUTH PASS 9040 23.8 16.8 142 30.2 21.8 139
ST. LAWRENCE ALT 8620 7.2 3.0 240 16.4 13.3 123
TOGWOTEE PASS 9580 37.1 26.5 140 39.9 33.1 121
TOWNSEND CREEK 8700 9.6 6.8 141 18.3 16.6 110
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Basin wide percent of average 151 126
BIGHORN BASIN
BALD MTN. 9375 25.6 24.3 105 23.0 22.4 103
BEAR TRAP MEADOW 7900 -M 2.0 * 13.0 11.8 110
BLACKWATER 9780 42.0 25.0 168 34.2 21.8 157
BONE SPRINGS DIV 9350 21.2 17.0 125 21.4 19.6 109
EVENING STAR 9200 43.7 30.4 144 46.6 27.3 171
GRAVE SPRINGS 8550 10.1 -M * 14.7 13.7 107
KIRWIN 9550 14.7 10.4 141 20.4 14.3 143
LOST CREEK 8080 20.5 14.1 145 20.5 16.3 126
MARQUETTE 8760 12.1 7.8 155 16.3 14.8 110
MIDDLE POWDER 7760 15.9 14.2 112 18.8 16.0 118
OWL CREEK 8975 -M 1.5 * 9.5 9.0 106
POWDER RIVER PASS 9480 14.9 7.1 210 17.9 15.9 113
SHELL CREEK 9580 -M 17.0 * 19.4 17.3 112
SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157
SYLVAN ROAD 8120 8.8 4.8 183 30.4 19.7 154
TIMBER CREEK 7950 1.5 3.2 47 11.5 11.3 102
YOUNTS PEAK 8350 23.3 16.3 143 -M 20.4 *
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Basin wide percent of average 140 129
SHOSHONE RIVER
BLACKWATER 9780 42.0 25.0 168 34.2 21.8 157
EVENING STAR 9200 43.7 30.4 144 46.6 27.3 171
KIRWIN 9550 14.7 10.4 141 20.4 14.3 143
MARQUETTE 8760 12.1 7.8 155 16.3 14.8 110
SYLVAN LAKE 8420 -M 21.3 * 37.2 23.7 157
SYLVAN ROAD 8120 8.8 4.8 183 30.4 19.7 154
YOUNTS PEAK 8350 23.3 16.3 143 -M 20.4 *
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Basin wide percent of average 153 152
POWDER-TONGUE
BEAR TRAP MEADOW 7900 -M 2.0 * 13.0 11.8 110
BONE SPRINGS DIV 9350 21.2 17.0 125 21.4 19.6 109
BURGESS JUNCTION 7880 14.7 11.6 127 17.8 15.6 114
CLOUD PEAK RESERVOIR 9860 22.0 16.4 134 20.9 18.6 112
DOME LAKE 8880 14.2 11.3 126 19.8 17.7 112
GRAVE SPRINGS 8550 10.1 -M * 14.7 13.7 107
HANSEN SAWMILL 8760 2.2 4.6 48 12.1 11.3 107
LOST CREEK 8080 20.5 14.1 145 20.5 16.3 126
MIDDLE POWDER 7760 15.9 14.2 112 18.8 16.0 118
POWDER RIVER PASS 9480 14.9 7.1 210 17.9 15.9 113
SUCKER CREEK 8880 18.7 11.2 167 21.7 17.9 121
TIE CREEK 6870 3.5 -M * 17.8 14.9 119
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Basin wide percent of average 134 114
BELLE FOURCHE
BLIND PARK 6890 1.7 5.7 30 19.5 15.4 127
NORTH RAPID CREEK 6130 5.0 -M * 18.4 -M *
WARREN PEAK 6520 15.2 5.7 267 -M 11.4 *
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Basin wide percent of average 148 127*
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.2 15.8 128 38.5 29.1 132
DIVIDE PEAK 8800 20.4 14.0 146 29.5 28.5 104
ELK RIVER 8700 17.3 10.2 170 30.7 23.0 133
JOE WRIGHT 10120 32.9 23.9 138 37.6 31.9 118
NORTH FRENCH CREEK 10100 37.6 27.3 138 36.3 29.5 123
OLD BATTLE 10000 46.7 37.2 126 46.5 37.1 125
SOUTH BRUSH CREEK 8400 3.4 6.9 49 21.7 21.6 100
TOWER 10500 29.9 50.9 59 59.7 45.4 131
WEBBER SPRINGS 9200 29.1 21.7 134 42.5 31.7 134
WILLOW CREEK PASS 9540 21.0 11.3 186 20.4 16.4 124
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Basin wide percent of average 118 124
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 35.8 25.8 139 34.8 25.0 139
CASPER MTN. 7900 21.4 12.6 170 27.4 20.3 135
CHRISTINA LAKE 9980 21.2 17.3 123 27.9 21.3 131
DEADMAN HILL 10220 21.7 18.7 116 24.6 22.3 110
LAPRELE CREEK 8320 6.3 4.0 158 18.2 15.9 114
RENO HILL 8400 20.2 9.6 210 26.7 23.1 116
ROACH 9700 24.5 16.5 148 27.8 27.4 101
SAND LAKE 10080 45.2 35.8 126 35.9 26.1 138
SOUTH PASS 9040 23.8 16.8 142 30.2 21.8 139
WINDY PEAK 7840 .2 4.4 5 14.0 13.4 104
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Basin wide percent of average 136 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 1.0 20* -M 19.4 *
DIVIDE PEAK 8800 20.4 14.0 146 29.5 28.5 104
OLD BATTLE 10000 46.7 37.2 126 46.5 37.1 125
SANDSTONE RS 8150 3.3 3.9 85 26.2 24.1 109
WHISKEY PARK 8950 41.5 26.2 158 41.1 35.5 116
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Basin wide percent of average 136 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 11.9 10.7 111 19.7 19.2 103
BLIND BULL SUM 8650 44.0 22.5 196 37.0 27.8 133
EAST RIM DIVIDE 7930 12.7 13.2 96 18.7 18.0 104
ELKHART PARK G.S. 9400 14.2 10.7 133 21.0 18.9 111
GROS VENTRE SUMMIT 8775 19.4 10.9 178 23.2 18.8 123
KENDALL R.S. 7740 11.9 2.3 517 25.0 18.3 137
LOOMIS PARK 8240 -M 12.1 * 29.8 22.3 134
NEW FORK LAKE 8340 5.8 6.8 85 15.6 17.1 91
SNIDER BASIN 8250 14.4 9.5 152 21.8 17.9 122
SPRING CREEK DIVIDE 9000 33.0 26.8 123 37.4 31.9 117
TRIPLE PEAK 8500 28.3 22.0 129 43.8 36.3 121
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Basin wide percent of average 144 119
LOWER GREEN RIVER
HAMS FORK 7840 4.5 1.2 375* 19.0 15.8 120
HEWINTA 9500 .3 1.1 27* 17.2 17.3 99
HICKERSON PARK 9150 .9 1.1 82 12.4 13.3 93
HOLE-IN-ROCK 9150 .1 .9 11 12.8 13.3 96
INDIAN CREEK 9425 38.7 25.8 150 37.0 30.3 122
KELLEY R.S. 8180 16.1 11.1 145 35.2 22.2 159
STEEL CREEK PARK 10100 19.2 17.1 112 19.9 17.4 114
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Basin wide percent of average 137 118
UPPER BEAR RIVER
BUG LAKE 7950 26.4 11.4 232 34.3 23.4 147
HAYDEN FORK 9400 8.0 2.0 400 29.9 24.1 124
KELLEY R.S. 8180 16.1 11.1 145 35.2 22.2 159
LILY LAKE 9050 6.6 6.3 105 23.7 19.1 124
MONTE CRISTO 8960 36.1 22.8 158 39.3 31.5 125
SALT RIVER SUMMIT 7600 12.4 2.3 539 26.7 20.0 134
TRIAL LAKE 9960 32.2 21.6 149 38.9 29.5 132
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Basin wide percent of average 178 134
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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.