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: MAY 21 , 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 9.2 3.1 297 39.2 26.9 146
COTTONWOOD CREEK 7600 15.8 9.1 174 40.4 30.1 134
GRANITE CREEK 6770 13.5 5.3 255 35.9 28.7 125
GRASSY LAKE 7265 27.5 21.8 126 61.9 44.7 138
GROS VENTRE SUMMIT 8775 12.9 6.5 198 23.4 19.4 121
LEWIS LAKE DIVIDE 7860 38.6 26.1 148 64.6 45.5 142
PHILLIPS BENCH 8200 32.5 22.6 144 51.6 35.9 144
SALT RIVER SUMMIT 7600 .5 .0 * 27.6 20.6 134
SNAKE RIVER STATION 6920 .4 7.4 5 41.5 31.4 132
SPRING CREEK DIVIDE 9000 27.3 23.5 116 37.7 32.7 115
THUMB DIVIDE 7980 12.2 7.2 169 38.0 25.2 151
TOGWOTEE PASS 9580 28.3 25.2 112 40.3 34.1 118
TWO OCEAN PLATEAU 9360 41.3 25.0 165 -M 37.1 *
WILLOW CREEK 8450 29.0 24.8 117 54.8 38.7 142
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Basin wide percent of average 139 135
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 23.0 * 35.5 23.7 150
BLACK BEAR 7950 -M 33.6 * -M 49.1 *
CANYON 7940 8.4 4.7 179 29.9 18.0 166
FISHER CREEK 9100 51.5 35.4 145 -M 45.3 *
MADISON PLATEAU 7750 25.3 14.9 170 46.7 32.1 145
NORTHEAST ENTRANCE 7350 .2 1.8 11 23.6 15.6 151
PARKER PEAK 9400 29.1 21.3 137 28.4 20.3 140
SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151
THUMB DIVIDE 7980 12.2 7.2 169 38.0 25.2 151
TWO OCEAN PLATEAU 9360 41.3 25.0 165 -M 37.1 *
WHISKEY CREEK 6800 10.9 6.6 165 35.6 26.6 134
WHITE MILL 8700 34.9 23.0 152 36.8 35.2 105
WOLVERINE 7650 .4 1.9 21 19.6 17.1 115
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Basin wide percent of average 151 139
WIND RIVER
BURROUGHS CREEK 8750 13.4 5.2 258 29.4 21.4 137
CHRISTINA LAKE 9980 16.4 14.6 112 27.9 22.3 125
COLD SPRINGS 9630 .2 1.9 11 16.9 15.0 113
HOBBS PARK 10100 16.7 14.2 118 19.8 19.6 101
LITTLE WARM 9620 5.7 3.7 154 25.8 18.2 142
SOUTH PASS 9040 16.5 14.2 116 30.2 22.8 132
ST. LAWRENCE ALT 8620 .0 1.6 0 16.4 14.0 117
TOGWOTEE PASS 9580 28.3 25.2 112 40.3 34.1 118
TOWNSEND CREEK 8700 .7 4.6 15 18.4 17.5 105
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Basin wide percent of average 115 122
BIGHORN BASIN
BALD MTN. 9375 20.8 22.3 93 23.0 23.7 97
BEAR TRAP MEADOW 7900 .2 .9 22 13.5 12.7 106
BLACKWATER 9780 -M 22.7 * 34.6 22.8 152
BONE SPRINGS DIV 9350 17.6 13.6 129 22.0 20.7 106
EVENING STAR 9200 35.2 28.6 123 46.9 28.5 165
GRAVE SPRINGS 8550 2.6 -M * 14.9 14.9 100
KIRWIN 9550 -M 8.3 * -M 15.2 *
LOST CREEK 8080 15.5 10.8 144 21.0 17.5 120
MARQUETTE 8760 6.6 6.4 103 16.8 16.0 105
MIDDLE POWDER 7760 8.7 9.9 88 19.3 17.0 114
OWL CREEK 8975 .2 .7 29 9.7 9.8 99
POWDER RIVER PASS 9480 10.6 4.5 236 19.1 17.0 112
SHELL CREEK 9580 15.3 15.0 102 19.8 18.4 108
SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151
SYLVAN ROAD 8120 .2 2.9 7 30.6 20.7 148
TIMBER CREEK 7950 .2 1.7 12 11.6 12.5 93
YOUNTS PEAK 8350 18.2 13.4 136 -M 21.2 *
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Basin wide percent of average 114 123
SHOSHONE RIVER
BLACKWATER 9780 -M 22.7 * 34.6 22.8 152
EVENING STAR 9200 35.2 28.6 123 46.9 28.5 165
KIRWIN 9550 -M 8.3 * -M 15.2 *
MARQUETTE 8760 6.6 6.4 103 16.8 16.0 105
SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151
SYLVAN ROAD 8120 .2 2.9 7 30.6 20.7 148
YOUNTS PEAK 8350 18.2 13.4 136 -M 21.2 *
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Basin wide percent of average 117 147
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .2 .9 22 13.5 12.7 106
BONE SPRINGS DIV 9350 17.6 13.6 129 22.0 20.7 106
BURGESS JUNCTION 7880 9.8 8.0 123 18.4 16.5 112
CLOUD PEAK RESERVOIR 9860 16.6 13.3 125 21.3 19.8 108
DOME LAKE 8880 8.1 8.0 101 20.5 18.9 108
GRAVE SPRINGS 8550 2.6 -M * 14.9 14.9 100
HANSEN SAWMILL 8760 .0 2.9 0 12.8 12.0 107
LOST CREEK 8080 15.5 10.8 144 21.0 17.5 120
MIDDLE POWDER 7760 8.7 9.9 88 19.3 17.0 114
POWDER RIVER PASS 9480 10.6 4.5 236 19.1 17.0 112
SUCKER CREEK 8880 12.7 8.2 155 22.7 19.1 119
TIE CREEK 6870 .1 -M * 18.3 15.9 115
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Basin wide percent of average 125 111
BELLE FOURCHE
BLIND PARK 6890 .0 3.0 0 20.3 16.6 122
NORTH RAPID CREEK 6130 .0 -M * 18.8 -M *
WARREN PEAK 6520 5.5 3.0 183 15.6 12.2 128
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Basin wide percent of average 92 125
UPPER N. PLATTE RIVER
COLUMBINE 9400 7.7 10.1 76 38.9 29.9 130
DIVIDE PEAK 8800 9.0 9.1 99 29.7 29.6 100
ELK RIVER 8700 6.0 5.6 107 31.4 23.6 133
JOE WRIGHT 10120 23.9 21.4 112 38.1 33.3 114
NORTH FRENCH CREEK 10100 30.1 24.4 123 36.7 30.8 119
OLD BATTLE 10000 42.9 32.3 133 46.8 38.2 123
SOUTH BRUSH CREEK 8400 .0 4.2 0 22.4 22.3 100
TOWER 10500 57.9 48.5 119 59.9 47.2 127
WEBBER SPRINGS 9200 19.8 16.9 117 42.7 32.6 131
WILLOW CREEK PASS 9540 15.1 7.7 196 20.8 17.3 120
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Basin wide percent of average 118 121
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.5 20.6 124 35.1 25.9 136
CASPER MTN. 7900 13.1 8.5 154 27.6 21.4 129
CHRISTINA LAKE 9980 16.4 14.6 112 27.9 22.3 125
DEADMAN HILL 10220 17.3 15.6 111 25.1 23.4 107
LAPRELE CREEK 8320 .1 2.6 4 18.7 16.9 111
RENO HILL 8400 12.1 6.6 183 26.9 23.6 114
ROACH 9700 15.9 13.0 122 28.2 28.6 99
SAND LAKE 10080 38.6 31.6 122 36.9 27.1 136
SOUTH PASS 9040 16.5 14.2 116 30.2 22.8 132
WINDY PEAK 7840 .2 2.3 9 14.5 14.5 100
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Basin wide percent of average 120 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .3 .0 * -M 20.0 *
DIVIDE PEAK 8800 9.0 9.1 99 29.7 29.6 100
OLD BATTLE 10000 42.9 32.3 133 46.8 38.2 123
SANDSTONE RS 8150 .0 1.5 0* 26.4 24.9 106
WHISKEY PARK 8950 34.4 20.6 167 41.2 36.8 112
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Basin wide percent of average 136 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 1.6 6.3 25 19.8 19.9 99
BLIND BULL SUM 8650 44.7 20.3 220 37.5 28.6 131
EAST RIM DIVIDE 7930 6.2 10.7 58 18.9 18.5 102
ELKHART PARK G.S. 9400 6.6 7.9 84 21.4 19.5 110
GROS VENTRE SUMMIT 8775 12.9 6.5 198 23.4 19.4 121
KENDALL R.S. 7740 2.1 .0 * 25.3 19.0 133
LOOMIS PARK 8240 -M 7.3 * 30.2 22.9 132
NEW FORK LAKE 8340 .1 4.0 3 16.3 17.6 93
SNIDER BASIN 8250 2.6 5.5 47 21.9 18.5 118
SPRING CREEK DIVIDE 9000 27.3 23.5 116 37.7 32.7 115
TRIPLE PEAK 8500 18.6 18.9 98 44.2 37.5 118
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Basin wide percent of average 116 117
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 19.2 16.3 118
HEWINTA 9500 .0 .0 100* 17.3 18.0 96
HICKERSON PARK 9150 .0 .4 0* 12.6 14.2 89
HOLE-IN-ROCK 9150 .1 .4 25* 12.9 14.2 91
INDIAN CREEK 9425 29.3 22.3 131 37.2 31.2 119
KELLEY R.S. 8180 6.1 6.5 94 35.5 22.9 155
STEEL CREEK PARK 10100 13.2 15.0 88 20.0 18.5 108
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Basin wide percent of average 109* 114
UPPER BEAR RIVER
BUG LAKE 7950 16.1 7.3 221 34.6 24.1 144
HAYDEN FORK 9400 .5 .5 100* 30.2 25.1 120
KELLEY R.S. 8180 6.1 6.5 94 35.5 22.9 155
LILY LAKE 9050 .2 4.0 5 23.9 20.0 120
MONTE CRISTO 8960 23.5 17.6 134 39.4 32.5 121
SALT RIVER SUMMIT 7600 .5 .0 * 27.6 20.6 134
TRIAL LAKE 9960 23.5 17.8 132 39.5 30.5 130
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Basin wide percent of average 130 131
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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.