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 THURSDAY: MAY 15 , 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 14.9 4.8 310 39.0 26.4 148
COTTONWOOD CREEK 7600 22.5 14.0 161 39.8 29.5 135
GRANITE CREEK 6770 17.6 7.3 241 35.7 28.2 127
GRASSY LAKE 7265 35.4 27.2 130 61.3 43.9 140
GROS VENTRE SUMMIT 8775 17.4 10.1 172 23.2 19.0 122
LEWIS LAKE DIVIDE 7860 47.1 29.6 159 63.8 44.6 143
PHILLIPS BENCH 8200 37.3 25.3 147 51.0 35.2 145
SALT RIVER SUMMIT 7600 8.4 .0 * 26.7 20.2 132
SNAKE RIVER STATION 6920 7.9 11.5 69 40.9 30.8 133
SPRING CREEK DIVIDE 9000 31.0 26.0 119 37.4 32.2 116
THUMB DIVIDE 7980 18.8 11.2 168 37.1 24.7 150
TOGWOTEE PASS 9580 33.2 26.0 128 39.9 33.4 119
TWO OCEAN PLATEAU 9360 44.4 26.3 169 -M 36.4 *
WILLOW CREEK 8450 36.3 27.8 131 53.5 37.9 141
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Basin wide percent of average 147 135
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 24.9 * 35.4 22.9 155
BLACK BEAR 7950 -M 37.0 * -M 48.4 *
CANYON 7940 13.7 6.5 211 29.6 17.5 169
FISHER CREEK 9100 54.3 37.4 145 -M 44.4 *
MADISON PLATEAU 7750 31.9 18.9 169 46.2 31.4 147
NORTHEAST ENTRANCE 7350 .2 2.6 8 23.3 15.1 154
PARKER PEAK 9400 34.1 22.7 150 -M 19.7 *
SYLVAN LAKE 8420 -M 20.6 * 37.2 24.1 154
THUMB DIVIDE 7980 18.8 11.2 168 37.1 24.7 150
TWO OCEAN PLATEAU 9360 44.4 26.3 169 -M 36.4 *
WHISKEY CREEK 6800 15.7 9.5 165 35.2 26.1 135
WHITE MILL 8700 38.3 24.9 154 -M 34.4 *
WOLVERINE 7650 1.7 3.0 57 19.0 16.5 115
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Basin wide percent of average 155 148
WIND RIVER
BURROUGHS CREEK 8750 18.4 6.9 267 29.0 20.8 139
CHRISTINA LAKE 9980 19.7 17.1 115 27.8 21.6 129
COLD SPRINGS 9630 -M 2.8 * 16.7 14.5 115
HOBBS PARK 10100 20.2 16.9 120 19.6 18.9 104
LITTLE WARM 9620 11.2 5.4 207 24.6 17.7 139
SOUTH PASS 9040 21.5 16.5 130 30.2 22.1 137
ST. LAWRENCE ALT 8620 3.9 2.4 163 16.4 13.5 121
TOGWOTEE PASS 9580 33.2 26.0 128 39.9 33.4 119
TOWNSEND CREEK 8700 6.9 6.1 113 18.4 16.9 109
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Basin wide percent of average 139 124
BIGHORN BASIN
BALD MTN. 9375 24.5 24.4 100 23.0 22.8 101
BEAR TRAP MEADOW 7900 .1 1.4 7 13.2 12.1 109
BLACKWATER 9780 40.4 24.8 163 34.3 22.1 155
BONE SPRINGS DIV 9350 20.8 16.6 125 21.4 20.0 107
EVENING STAR 9200 41.1 30.3 136 46.7 27.7 169
GRAVE SPRINGS 8550 8.4 -M * 14.8 14.1 105
KIRWIN 9550 12.7 10.1 126 20.4 14.6 140
LOST CREEK 8080 18.9 13.6 139 20.6 16.7 123
MARQUETTE 8760 10.1 7.6 133 16.3 15.2 107
MIDDLE POWDER 7760 13.5 14.0 96 18.9 16.3 116
OWL CREEK 8975 .2 1.0 20 9.6 9.3 103
POWDER RIVER PASS 9480 13.9 6.2 224 18.0 16.3 110
SHELL CREEK 9580 -M 17.0 * 19.6 17.7 111
SYLVAN LAKE 8420 -M 20.6 * 37.2 24.1 154
SYLVAN ROAD 8120 5.6 4.0 140 30.4 20.0 152
TIMBER CREEK 7950 .1 2.5 4 11.5 11.7 98
YOUNTS PEAK 8350 21.9 15.8 139 -M 20.7 *
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Basin wide percent of average 130 127
SHOSHONE RIVER
BLACKWATER 9780 40.4 24.8 163 34.3 22.1 155
EVENING STAR 9200 41.1 30.3 136 46.7 27.7 169
KIRWIN 9550 12.7 10.1 126 20.4 14.6 140
MARQUETTE 8760 10.1 7.6 133 16.3 15.2 107
SYLVAN LAKE 8420 -M 20.6 * 37.2 24.1 154
SYLVAN ROAD 8120 5.6 4.0 140 30.4 20.0 152
YOUNTS PEAK 8350 21.9 15.8 139 -M 20.7 *
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Basin wide percent of average 142 150
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .1 1.4 7 13.2 12.1 109
BONE SPRINGS DIV 9350 20.8 16.6 125 21.4 20.0 107
BURGESS JUNCTION 7880 13.1 11.1 118 18.0 15.9 113
CLOUD PEAK RESERVOIR 9860 20.8 16.1 129 20.9 19.0 110
DOME LAKE 8880 12.6 10.3 122 19.8 18.1 109
GRAVE SPRINGS 8550 8.4 -M * 14.8 14.1 105
HANSEN SAWMILL 8760 .0 4.0 0 12.2 11.5 106
LOST CREEK 8080 18.9 13.6 139 20.6 16.7 123
MIDDLE POWDER 7760 13.5 14.0 96 18.9 16.3 116
POWDER RIVER PASS 9480 13.9 6.2 224 18.0 16.3 110
SUCKER CREEK 8880 16.6 10.5 158 21.9 18.3 120
TIE CREEK 6870 .7 -M * 17.9 15.2 118
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Basin wide percent of average 126 112
BELLE FOURCHE
BLIND PARK 6890 -M 4.6 * 19.8 15.8 125
NORTH RAPID CREEK 6130 1.7 -M * 18.5 -M *
WARREN PEAK 6520 12.7 4.6 276 -M 11.7 *
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Basin wide percent of average 276* 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.5 14.1 117 38.5 29.4 131
DIVIDE PEAK 8800 17.2 12.5 138 29.5 28.9 102
ELK RIVER 8700 14.1 8.5 166 31.0 23.2 134
JOE WRIGHT 10120 32.2 23.7 136 37.8 32.4 117
NORTH FRENCH CREEK 10100 35.7 26.7 134 36.5 29.9 122
OLD BATTLE 10000 45.1 36.9 122 46.6 37.5 124
SOUTH BRUSH CREEK 8400 .6 5.9 10 21.8 21.8 100
TOWER 10500 67.0 50.8 132 59.7 46.0 130
WEBBER SPRINGS 9200 26.6 20.5 130 42.5 32.0 133
WILLOW CREEK PASS 9540 19.9 10.7 186 20.4 16.7 122
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Basin wide percent of average 131 122
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 32.2 24.9 129 34.9 25.3 138
CASPER MTN. 7900 19.0 11.2 170 27.5 20.7 133
CHRISTINA LAKE 9980 19.7 17.1 115 27.8 21.6 129
DEADMAN HILL 10220 20.5 18.6 110 24.8 22.7 109
LAPRELE CREEK 8320 3.1 3.4 91 18.3 16.2 113
RENO HILL 8400 18.1 8.6 210 26.8 23.3 115
ROACH 9700 22.4 16.0 140 28.1 27.8 101
SAND LAKE 10080 44.7 35.4 126 36.8 26.4 139
SOUTH PASS 9040 21.5 16.5 130 30.2 22.1 137
WINDY PEAK 7840 .2 3.5 6 14.3 13.8 104
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Basin wide percent of average 130 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .3 .0 * -M 19.6 *
DIVIDE PEAK 8800 17.2 12.5 138 29.5 28.9 102
OLD BATTLE 10000 45.1 36.9 122 46.6 37.5 124
SANDSTONE RS 8150 .0 2.3 0 26.4 24.4 108
WHISKEY PARK 8950 38.1 25.3 151 41.1 35.9 114
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Basin wide percent of average 130 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.8 9.8 90 19.8 19.4 102
BLIND BULL SUM 8650 44.9 22.4 200 37.0 28.1 132
EAST RIM DIVIDE 7930 10.7 12.7 84 18.7 18.2 103
ELKHART PARK G.S. 9400 11.5 9.8 117 21.1 19.1 110
GROS VENTRE SUMMIT 8775 17.4 10.1 172 23.2 19.0 122
KENDALL R.S. 7740 9.0 .0 * 25.0 18.5 135
LOOMIS PARK 8240 -M 11.3 * 29.8 22.5 132
NEW FORK LAKE 8340 2.8 6.2 45 16.0 17.3 92
SNIDER BASIN 8250 11.4 8.5 134 21.8 18.1 120
SPRING CREEK DIVIDE 9000 31.0 26.0 119 37.4 32.2 116
TRIPLE PEAK 8500 25.3 21.2 119 43.9 36.7 120
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Basin wide percent of average 129 118
LOWER GREEN RIVER
HAMS FORK 7840 .8 .0 * 19.0 16.0 119
HEWINTA 9500 .0 .0 100* 17.1 17.5 98
HICKERSON PARK 9150 .0 .6 0* 12.4 13.6 91
HOLE-IN-ROCK 9150 .1 .5 20* 12.8 13.6 94
INDIAN CREEK 9425 35.3 24.9 142 37.1 30.6 121
KELLEY R.S. 8180 12.9 10.0 129 35.3 22.4 158
STEEL CREEK PARK 10100 16.9 16.6 102 19.9 17.8 112
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Basin wide percent of average 124* 117
UPPER BEAR RIVER
BUG LAKE 7950 23.1 10.1 229 34.2 23.6 145
HAYDEN FORK 9400 4.4 .7 629* 29.9 24.4 123
KELLEY R.S. 8180 12.9 10.0 129 35.3 22.4 158
LILY LAKE 9050 1.1 5.7 19 23.7 19.4 122
MONTE CRISTO 8960 32.4 21.9 148 39.3 31.8 124
SALT RIVER SUMMIT 7600 8.4 .0 * 26.7 20.2 132
TRIAL LAKE 9960 28.9 21.0 138 38.9 29.8 131
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Basin wide percent of average 148 133
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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.