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 SUNDAY: MAY 11 , 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 18.9 6.5 291 39.1 26.1 150
COTTONWOOD CREEK 7600 27.6 15.7 176 39.6 29.1 136
GRANITE CREEK 6770 20.8 8.9 234 35.7 27.8 128
GRASSY LAKE 7265 41.9 29.1 144 61.3 43.3 142
GROS VENTRE SUMMIT 8775 19.9 11.2 178 23.1 18.7 124
LEWIS LAKE DIVIDE 7860 51.9 31.0 167 63.8 44.1 145
PHILLIPS BENCH 8200 40.4 26.5 152 51.0 34.7 147
SALT RIVER SUMMIT 7600 13.4 3.1 432 26.7 19.9 134
SNAKE RIVER STATION 6920 -M 12.9 * -M 30.4 *
SPRING CREEK DIVIDE 9000 34.0 27.0 126 37.4 31.8 118
THUMB DIVIDE 7980 -M 12.3 * -M 24.4 *
TOGWOTEE PASS 9580 37.3 26.7 140 39.9 33.0 121
TWO OCEAN PLATEAU 9360 45.0 26.7 169 -M 35.9 *
WILLOW CREEK 8450 41.2 29.0 142 53.5 37.4 143
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Basin wide percent of average 163 136
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.2 * 35.3 22.4 158
BLACK BEAR 7950 -M 37.8 * -M 47.8 *
CANYON 7940 17.3 7.8 222 29.6 17.1 173
FISHER CREEK 9100 58.8 37.8 156 -M 43.7 *
MADISON PLATEAU 7750 36.5 20.3 180 46.2 31.0 149
NORTHEAST ENTRANCE 7350 3.6 3.5 103 23.4 14.7 159
PARKER PEAK 9400 38.5 23.0 167 -M 19.3 *
SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158
THUMB DIVIDE 7980 -M 12.3 * -M 24.4 *
TWO OCEAN PLATEAU 9360 45.0 26.7 169 -M 35.9 *
WHISKEY CREEK 6800 18.9 11.1 170 35.3 25.8 137
WHITE MILL 8700 41.8 25.3 165 -M 33.9 *
WOLVERINE 7650 6.7 4.5 149 19.0 16.1 118
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Basin wide percent of average 167 150
WIND RIVER
BURROUGHS CREEK 8750 20.6 8.6 240 28.9 20.4 142
CHRISTINA LAKE 9980 21.1 17.4 121 27.8 21.2 131
COLD SPRINGS 9630 5.8 3.9 149 16.6 14.1 118
HOBBS PARK 10100 21.3 17.2 124 19.6 18.5 106
LITTLE WARM 9620 15.0 6.8 221 24.4 17.3 141
SOUTH PASS 9040 24.2 17.0 142 30.2 21.7 139
ST. LAWRENCE ALT 8620 7.7 3.3 233 16.4 13.2 124
TOGWOTEE PASS 9580 37.3 26.7 140 39.9 33.0 121
TOWNSEND CREEK 8700 9.8 7.1 138 18.4 16.5 112
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Basin wide percent of average 151 126
BIGHORN BASIN
BALD MTN. 9375 25.8 24.3 106 23.0 22.3 103
BEAR TRAP MEADOW 7900 -M 2.2 * 13.1 11.7 112
BLACKWATER 9780 42.4 25.1 169 34.3 21.7 158
BONE SPRINGS DIV 9350 21.5 17.1 126 21.4 19.4 110
EVENING STAR 9200 44.0 30.4 145 46.6 27.2 171
GRAVE SPRINGS 8550 10.5 -M * 14.8 13.6 109
KIRWIN 9550 15.2 10.6 143 20.4 14.2 144
LOST CREEK 8080 20.7 14.2 146 20.5 16.2 127
MARQUETTE 8760 12.6 7.9 159 16.3 14.7 111
MIDDLE POWDER 7760 15.9 14.2 112 18.9 15.9 119
OWL CREEK 8975 -M 1.7 * 9.5 8.9 107
POWDER RIVER PASS 9480 14.8 7.4 200 17.9 15.8 113
SHELL CREEK 9580 19.7 17.0 116 19.3 17.2 112
SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158
SYLVAN ROAD 8120 -M 5.1 * 30.4 19.6 155
TIMBER CREEK 7950 2.6 3.5 74 11.5 11.2 103
YOUNTS PEAK 8350 23.4 16.5 142 -M 20.3 *
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Basin wide percent of average 137 130
SHOSHONE RIVER
BLACKWATER 9780 42.4 25.1 169 34.3 21.7 158
EVENING STAR 9200 44.0 30.4 145 46.6 27.2 171
KIRWIN 9550 15.2 10.6 143 20.4 14.2 144
MARQUETTE 8760 12.6 7.9 159 16.3 14.7 111
SYLVAN LAKE 8420 -M 21.5 * 37.2 23.6 158
SYLVAN ROAD 8120 -M 5.1 * 30.4 19.6 155
YOUNTS PEAK 8350 23.4 16.5 142 -M 20.3 *
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Basin wide percent of average 152 153
POWDER-TONGUE
BEAR TRAP MEADOW 7900 -M 2.2 * 13.1 11.7 112
BONE SPRINGS DIV 9350 21.5 17.1 126 21.4 19.4 110
BURGESS JUNCTION 7880 14.9 11.8 126 17.9 15.5 115
CLOUD PEAK RESERVOIR 9860 22.1 16.6 133 20.9 18.5 113
DOME LAKE 8880 14.7 11.6 127 19.8 17.6 112
GRAVE SPRINGS 8550 10.5 -M * 14.8 13.6 109
HANSEN SAWMILL 8760 2.5 4.8 52 12.1 11.2 108
LOST CREEK 8080 20.7 14.2 146 20.5 16.2 127
MIDDLE POWDER 7760 15.9 14.2 112 18.9 15.9 119
POWDER RIVER PASS 9480 14.8 7.4 200 17.9 15.8 113
SUCKER CREEK 8880 18.7 11.4 164 21.8 17.8 122
TIE CREEK 6870 4.1 -M * 17.9 14.8 121
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Basin wide percent of average 134 115
BELLE FOURCHE
BLIND PARK 6890 2.5 6.0 42 19.6 15.2 129
NORTH RAPID CREEK 6130 5.6 -M * 18.5 -M *
WARREN PEAK 6520 15.7 6.0 262 -M 11.3 *
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Basin wide percent of average 152 129*
UPPER N. PLATTE RIVER
COLUMBINE 9400 21.7 16.4 132 38.5 29.0 133
DIVIDE PEAK 8800 21.6 14.4 150 29.7 28.4 105
ELK RIVER 8700 18.7 10.7 175 30.9 22.9 135
JOE WRIGHT 10120 33.9 24.0 141 37.5 31.8 118
NORTH FRENCH CREEK 10100 38.2 27.5 139 36.3 29.4 123
OLD BATTLE 10000 47.3 37.3 127 46.6 37.0 126
SOUTH BRUSH CREEK 8400 4.4 7.2 61 21.8 21.5 101
TOWER 10500 30.2 50.9 59 59.7 45.2 132
WEBBER SPRINGS 9200 30.8 22.1 139 42.6 31.6 135
WILLOW CREEK PASS 9540 21.5 11.5 187 20.3 16.3 125
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Basin wide percent of average 121 124
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 36.8 26.0 142 34.9 24.9 140
CASPER MTN. 7900 22.0 13.1 168 27.5 20.1 137
CHRISTINA LAKE 9980 21.1 17.4 121 27.8 21.2 131
DEADMAN HILL 10220 22.0 18.7 118 24.6 22.2 111
LAPRELE CREEK 8320 6.4 4.2 152 18.3 15.8 116
RENO HILL 8400 20.5 10.0 205 26.9 23.0 117
ROACH 9700 25.3 16.6 152 27.8 27.2 102
SAND LAKE 10080 45.2 35.9 126 35.7 26.0 137
SOUTH PASS 9040 24.2 17.0 142 30.2 21.7 139
WINDY PEAK 7840 .3 4.8 6 14.2 13.3 107
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Basin wide percent of average 137 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 1.4 14 32.9 19.3 170
DIVIDE PEAK 8800 21.6 14.4 150 29.7 28.4 105
OLD BATTLE 10000 47.3 37.3 127 46.6 37.0 126
SANDSTONE RS 8150 4.7 4.4 107 26.2 24.0 109
WHISKEY PARK 8950 42.6 26.5 161 41.1 35.4 116
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Basin wide percent of average 139 122
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.7 11.0 115 19.8 19.2 103
BLIND BULL SUM 8650 44.0 22.5 196 37.0 27.7 134
EAST RIM DIVIDE 7930 13.3 13.3 100 18.8 17.9 105
ELKHART PARK G.S. 9400 15.1 11.0 137 21.0 18.8 112
GROS VENTRE SUMMIT 8775 19.9 11.2 178 23.1 18.7 124
KENDALL R.S. 7740 12.8 3.0 427 24.9 18.3 136
LOOMIS PARK 8240 -M 12.4 * 29.8 22.2 134
NEW FORK LAKE 8340 6.7 7.0 96 15.6 17.0 92
SNIDER BASIN 8250 15.2 9.8 155 21.8 17.8 122
SPRING CREEK DIVIDE 9000 34.0 27.0 126 37.4 31.8 118
TRIPLE PEAK 8500 29.3 22.3 131 43.9 36.2 121
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Basin wide percent of average 147 119
LOWER GREEN RIVER
HAMS FORK 7840 5.5 1.6 344 19.0 15.7 121
HEWINTA 9500 .9 1.5 60 17.2 17.2 100
HICKERSON PARK 9150 2.3 1.3 177 12.4 13.2 94
HOLE-IN-ROCK 9150 .1 1.0 10 12.8 13.2 97
INDIAN CREEK 9425 39.6 26.0 152 37.0 30.2 123
KELLEY R.S. 8180 17.0 11.4 149 35.2 22.1 159
STEEL CREEK PARK 10100 19.7 17.3 114 19.9 17.3 115
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Basin wide percent of average 142 119
UPPER BEAR RIVER
BUG LAKE 7950 27.6 11.8 234 34.3 23.3 147
HAYDEN FORK 9400 9.1 2.4 379 29.9 24.0 125
KELLEY R.S. 8180 17.0 11.4 149 35.2 22.1 159
LILY LAKE 9050 7.8 6.6 118 23.7 19.0 125
MONTE CRISTO 8960 37.1 23.1 161 39.3 31.4 125
SALT RIVER SUMMIT 7600 13.4 3.1 432 26.7 19.9 134
TRIAL LAKE 9960 33.4 21.9 153 38.9 29.4 132
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Basin wide percent of average 181 135
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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.