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 4 , 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 25.9 9.4 276 39.0 25.5 153
COTTONWOOD CREEK 7600 33.1 18.7 177 39.5 28.5 139
GRANITE CREEK 6770 24.9 11.7 213 35.7 27.1 132
GRASSY LAKE 7265 48.4 32.5 149 61.2 42.3 145
GROS VENTRE SUMMIT 8775 23.4 13.1 179 23.2 18.3 127
LEWIS LAKE DIVIDE 7860 55.1 33.4 165 63.6 43.0 148
PHILLIPS BENCH 8200 43.5 28.6 152 50.9 33.9 150
SALT RIVER SUMMIT 7600 19.9 8.5 234 26.8 19.4 138
SNAKE RIVER STATION 6920 21.8 15.3 142 40.8 29.7 137
SPRING CREEK DIVIDE 9000 42.3 28.8 147 37.3 31.1 120
THUMB DIVIDE 7980 30.3 14.3 212 36.9 23.8 155
TOGWOTEE PASS 9580 38.7 27.8 139 39.6 32.2 123
TWO OCEAN PLATEAU 9360 51.0 27.3 187 -M 35.1 *
WILLOW CREEK 8450 45.3 31.0 146 53.4 36.6 146
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Basin wide percent of average 168 140
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 25.8 * 34.6 21.6 160
BLACK BEAR 7950 -M 39.2 * -M 46.9 *
CANYON 7940 21.9 10.0 219 -M 16.6 *
FISHER CREEK 9100 60.7 38.4 158 -M 42.7 *
MADISON PLATEAU 7750 42.6 22.8 187 46.0 30.2 152
NORTHEAST ENTRANCE 7350 8.8 5.2 169 22.7 14.2 160
PARKER PEAK 9400 37.5 23.5 160 -M 18.5 *
SYLVAN LAKE 8420 32.3 23.1 140 36.9 22.7 163
THUMB DIVIDE 7980 30.3 14.3 212 36.9 23.8 155
TWO OCEAN PLATEAU 9360 51.0 27.3 187 -M 35.1 *
WHISKEY CREEK 6800 22.7 14.0 162 34.9 25.2 138
WHITE MILL 8700 42.8 26.0 165 -M 33.0 *
WOLVERINE 7650 12.5 7.0 179 18.4 15.5 119
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Basin wide percent of average 172 150
WIND RIVER
BURROUGHS CREEK 8750 24.4 11.6 210 28.8 19.7 146
CHRISTINA LAKE 9980 23.4 17.8 131 27.6 20.4 135
COLD SPRINGS 9630 9.0 5.9 153 16.6 13.4 124
HOBBS PARK 10100 23.1 17.8 130 19.6 17.6 111
LITTLE WARM 9620 19.9 9.3 214 24.4 16.6 147
SOUTH PASS 9040 28.4 17.8 160 30.0 20.9 144
ST. LAWRENCE ALT 8620 11.8 4.8 246 16.4 12.7 129
TOGWOTEE PASS 9580 38.7 27.8 139 39.6 32.2 123
TOWNSEND CREEK 8700 13.3 8.8 151 18.5 15.8 117
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Basin wide percent of average 158 131
BIGHORN BASIN
BALD MTN. 9375 26.5 24.2 110 22.6 21.2 107
BEAR TRAP MEADOW 7900 5.4 3.6 150 12.9 10.9 118
BLACKWATER 9780 43.3 25.5 170 34.0 20.9 163
BONE SPRINGS DIV 9350 21.9 18.0 122 21.3 18.5 115
EVENING STAR 9200 45.9 30.7 150 45.9 26.3 175
GRAVE SPRINGS 8550 13.6 -M * 14.7 12.8 115
KIRWIN 9550 17.9 11.4 157 20.2 13.6 149
LOST CREEK 8080 21.7 15.3 142 20.4 15.4 132
MARQUETTE 8760 15.3 8.4 182 16.2 13.9 117
MIDDLE POWDER 7760 19.4 14.6 133 18.8 15.1 125
OWL CREEK 8975 7.4 2.9 255 9.6 8.4 114
POWDER RIVER PASS 9480 -M 9.6 * 17.4 15.0 116
SHELL CREEK 9580 21.9 17.0 129 19.2 16.3 118
SYLVAN LAKE 8420 32.3 23.1 140 36.9 22.7 163
SYLVAN ROAD 8120 16.5 7.1 232 30.2 18.9 160
TIMBER CREEK 7950 7.5 5.2 144 11.6 10.4 112
YOUNTS PEAK 8350 25.5 17.8 143 -M 19.6 *
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Basin wide percent of average 146 135
SHOSHONE RIVER
BLACKWATER 9780 43.3 25.5 170 34.0 20.9 163
EVENING STAR 9200 45.9 30.7 150 45.9 26.3 175
KIRWIN 9550 17.9 11.4 157 20.2 13.6 149
MARQUETTE 8760 15.3 8.4 182 16.2 13.9 117
SYLVAN LAKE 8420 32.3 23.1 140 36.9 22.7 163
SYLVAN ROAD 8120 16.5 7.1 232 30.2 18.9 160
YOUNTS PEAK 8350 25.5 17.8 143 -M 19.6 *
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Basin wide percent of average 159 158
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.4 3.6 150 12.9 10.9 118
BONE SPRINGS DIV 9350 21.9 18.0 122 21.3 18.5 115
BURGESS JUNCTION 7880 17.4 13.0 134 17.7 14.7 120
CLOUD PEAK RESERVOIR 9860 23.1 17.4 133 20.6 17.5 118
DOME LAKE 8880 17.7 14.0 126 19.7 16.8 117
GRAVE SPRINGS 8550 13.6 -M * 14.7 12.8 115
HANSEN SAWMILL 8760 7.1 6.3 113 12.1 10.6 114
LOST CREEK 8080 21.7 15.3 142 20.4 15.4 132
MIDDLE POWDER 7760 19.4 14.6 133 18.8 15.1 125
POWDER RIVER PASS 9480 -M 9.6 * 17.4 15.0 116
SUCKER CREEK 8880 20.6 13.1 157 21.6 16.9 128
TIE CREEK 6870 8.0 -M * 17.6 14.1 125
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Basin wide percent of average 134 120
BELLE FOURCHE
BLIND PARK 6890 8.1 8.5 95 19.5 14.2 137
NORTH RAPID CREEK 6130 10.9 -M * 18.4 -M *
WARREN PEAK 6520 20.9 8.5 246 -M 10.6 *
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Basin wide percent of average 171 137*
UPPER N. PLATTE RIVER
COLUMBINE 9400 29.8 20.4 146 38.3 28.4 135
DIVIDE PEAK 8800 28.2 17.8 158 30.1 27.6 109
ELK RIVER 8700 26.7 14.6 183 30.9 22.3 139
JOE WRIGHT 10120 35.9 24.5 147 37.5 30.7 122
NORTH FRENCH CREEK 10100 40.9 28.8 142 36.2 28.4 127
OLD BATTLE 10000 49.9 37.9 132 46.5 36.1 129
SOUTH BRUSH CREEK 8400 11.0 9.6 115 21.7 20.9 104
TOWER 10500 31.9 51.0 63 57.6 43.8 132
WEBBER SPRINGS 9200 34.8 24.8 140 42.6 30.9 138
WILLOW CREEK PASS 9540 -M 12.9 * 20.2 15.7 129
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Basin wide percent of average 126 127
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.3 28.0 151 34.8 24.1 144
CASPER MTN. 7900 26.7 16.4 163 27.3 19.2 142
CHRISTINA LAKE 9980 23.4 17.8 131 27.6 20.4 135
DEADMAN HILL 10220 24.2 19.0 127 24.6 21.4 115
LAPRELE CREEK 8320 12.5 5.7 219 18.1 15.0 121
RENO HILL 8400 25.7 12.4 207 26.8 22.6 119
ROACH 9700 26.2 17.7 148 27.8 26.2 106
SAND LAKE 10080 45.2 36.8 123 35.0 25.1 139
SOUTH PASS 9040 28.4 17.8 160 30.0 20.9 144
WINDY PEAK 7840 6.6 7.0 94 14.6 12.5 117
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Basin wide percent of average 146 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.6 3.8 147 32.6 18.7 174
DIVIDE PEAK 8800 28.2 17.8 158 30.1 27.6 109
OLD BATTLE 10000 49.9 37.9 132 46.5 36.1 129
SANDSTONE RS 8150 13.4 8.2 163 26.2 23.3 112
WHISKEY PARK 8950 45.8 28.7 160 41.0 34.4 119
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Basin wide percent of average 148 126
UPPER GREEN RIVER
BIG SANDY OPENING 9100 18.3 13.0 141 19.6 18.7 105
BLIND BULL SUM 8650 44.6 22.6 197 36.9 27.2 136
EAST RIM DIVIDE 7930 16.4 14.4 114 18.8 17.5 107
ELKHART PARK G.S. 9400 19.0 13.1 145 20.9 18.4 114
GROS VENTRE SUMMIT 8775 23.4 13.1 179 23.2 18.3 127
KENDALL R.S. 7740 18.6 8.3 224 25.1 17.8 141
LOOMIS PARK 8240 -M 14.3 * 29.7 21.6 138
NEW FORK LAKE 8340 12.1 8.5 142 15.1 16.6 91
SNIDER BASIN 8250 20.6 12.0 172 22.1 17.4 127
SPRING CREEK DIVIDE 9000 42.3 28.8 147 37.3 31.1 120
TRIPLE PEAK 8500 35.4 24.2 146 43.8 35.4 124
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Basin wide percent of average 159 122
LOWER GREEN RIVER
HAMS FORK 7840 12.7 4.5 282 18.9 15.4 123
HEWINTA 9500 8.3 4.2 198 17.2 16.6 104
HICKERSON PARK 9150 9.2 2.4 383 12.5 12.6 99
HOLE-IN-ROCK 9150 7.8 1.9 411 12.9 12.6 102
INDIAN CREEK 9425 44.4 28.0 159 36.9 29.5 125
KELLEY R.S. 8180 22.8 13.9 164 35.2 21.5 164
STEEL CREEK PARK 10100 20.9 18.4 114 19.9 16.5 121
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Basin wide percent of average 172 123
UPPER BEAR RIVER
BUG LAKE 7950 34.0 14.7 231 34.5 22.8 151
HAYDEN FORK 9400 15.2 5.3 287 30.0 23.3 129
KELLEY R.S. 8180 22.8 13.9 164 35.2 21.5 164
LILY LAKE 9050 16.0 8.1 198 23.7 18.3 130
MONTE CRISTO 8960 42.3 25.3 167 39.4 30.6 129
SALT RIVER SUMMIT 7600 19.9 8.5 234 26.8 19.4 138
TRIAL LAKE 9960 36.9 23.4 158 37.0 28.6 129
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Basin wide percent of average 189 138
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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.