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 17 , 1999
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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 12.9 4.3 298 30.9 26.7 116
COTTONWOOD CREEK 7600 23.9 12.5 193 36.7 29.7 124
GRANITE CREEK 6770 13.2 6.8 198 27.7 28.4 98
GRASSY LAKE 7265 39.8 25.5 157 49.7 44.3 113
GROS VENTRE SUMMIT 8775 -M 9.0 * -M 19.2 *
LEWIS LAKE DIVIDE 7860 39.3 28.5 138 46.0 45.0 103
PHILLIPS BENCH 8200 33.3 24.4 137 37.3 35.5 105
SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 112
SNAKE RIVER STATION 6920 11.1 10.2 109 30.4 31.0 98
SPRING CREEK DIVIDE 9000 38.3 25.2 152 36.3 32.4 113
THUMB DIVIDE 7980 -M 10.0 * -M 24.9 *
TOGWOTEE PASS 9580 -M 25.9 * 35.8 33.8 106
TWO OCEAN PLATEAU 9360 42.9 25.9 166 37.2 36.8 102
WILLOW CREEK 8450 33.0 26.9 124 49.0 38.3 129
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Basin wide percent of average 152 110
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.0 24.4 120 28.0 23.2 121
BLACK BEAR 7950 58.3 35.9 163 55.4 48.8 114
CANYON 7940 13.4 6.0 222 22.7 17.7 129
FISHER CREEK 9100 42.9 36.8 117 43.8 44.8 98
MADISON PLATEAU 7750 -M 17.7 * 39.0 31.7 124
NORTHEAST ENTRANCE 7350 2.4 2.4 100 17.7 15.4 116
PARKER PEAK 9400 27.9 22.4 125 -M 20.0 *
SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139
THUMB DIVIDE 7980 -M 10.0 * -M 24.9 *
TWO OCEAN PLATEAU 9360 42.9 25.9 166 37.2 36.8 102
WHISKEY CREEK 6800 -M 8.6 * -M 26.4 *
WHITE MILL 8700 31.4 24.4 130 30.0 34.8 87
WOLVERINE 7650 .7 2.8 26 15.7 16.7 95
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Basin wide percent of average 137 111
WIND RIVER
BURROUGHS CREEK 8750 19.0 6.5 297 23.5 21.0 112
COLD SPRINGS 9630 18.7 2.7 716 24.7 14.7 169
DEER PARK 9700 27.2 -M * 34.2 -M *
HOBBS PARK 10100 -M 16.2 * 29.2 19.2 152
LITTLE WARM 9620 20.4 5.0 417 25.0 17.9 140
SOUTH PASS 9040 24.7 15.9 157 31.0 22.4 139
ST. LAWRENCE ALT 8620 12.2 2.3 555 21.5 13.7 157
TOGWOTEE PASS 9580 -M 25.9 * 35.8 33.8 106
TOWNSEND CREEK 8700 18.4 5.6 327 26.4 17.2 154
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Basin wide percent of average 302 136
BIGHORN BASIN
BALD MTN. 9375 26.5 23.9 112 25.9 23.2 112
BEAR TRAP MEADOW 7900 -M 1.4 * 18.0 12.5 146
BLACKWATER 9780 37.3 24.2 155 31.0 22.4 139
BONE SPRINGS DIV 9350 23.7 15.7 151 25.4 20.4 126
EVENING STAR 9200 37.3 29.9 126 41.0 28.0 147
GRAVE SPRINGS 8550 11.4 10.0 114 18.9 14.5 131
KIRWIN 9550 18.0 9.6 188 21.4 14.9 145
MARQUETTE 8760 19.2 7.3 266 21.7 15.5 140
MIDDLE POWDER 7760 17.7 12.7 140 23.2 16.7 140
OWL CREEK 8975 11.4 .0 1256 15.4 9.5 162
POWDER RIVER PASS 9480 13.5 5.8 236 22.9 16.7 138
SHELL CREEK 9580 20.5 16.4 126 21.4 18.0 119
SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139
SYLVAN ROAD 8120 -M 3.8 * -M 20.4 *
TIMBER CREEK 7950 11.5 2.3 501 18.4 12.0 154
YOUNTS PEAK 8350 21.2 15.1 141 22.7 20.9 109
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Basin wide percent of average 153 135
SHOSHONE RIVER
BLACKWATER 9780 37.3 24.2 155 31.0 22.4 139
EVENING STAR 9200 37.3 29.9 126 41.0 28.0 147
KIRWIN 9550 18.0 9.6 188 21.4 14.9 145
MARQUETTE 8760 19.2 7.3 266 21.7 15.5 140
SYLVAN LAKE 8420 25.4 19.9 128 33.9 24.4 139
SYLVAN ROAD 8120 -M 3.8 * -M 20.4 *
YOUNTS PEAK 8350 21.2 15.1 141 22.7 20.9 109
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Basin wide percent of average 150 137
POWDER-TONGUE
BEAR TRAP MEADOW 7900 -M 1.4 * 18.0 12.5 146
BIG GOOSE 7990 10.5 -M * 19.4 -M *
BONE SPRINGS DIV 9350 23.7 15.7 151 25.4 20.4 126
BURGESS JUNCTION 7880 12.5 10.1 124 18.7 16.2 115
CLOUD PEAK RESERVOIR 9860 25.2 15.2 166 25.7 19.4 133
DOME LAKE 8880 -M 9.6 * 18.7 18.4 102
GRAVE SPRINGS 8550 11.4 10.0 114 18.9 14.5 131
HANSEN SAWMILL 8760 4.3 3.8 117 18.0 11.7 154
MIDDLE POWDER 7760 17.7 12.7 140 23.2 16.7 140
POWDER RIVER PASS 9480 13.5 5.8 236 22.9 16.7 138
SUCKER CREEK 8880 16.2 9.9 166 23.2 18.7 125
TIE CREEK 6870 4.5 -M * 19.2 15.5 124
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Basin wide percent of average 150 129
BELLE FOURCHE
BLIND PARK 6890 .5 4.1 10 20.4 16.2 127
NORTH RAPID CREEK 6130 .0 -M * 17.7 -M *
WARREN PEAK 6520 .7 4.1 18 -M 12.0 *
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Basin wide percent of average 14 127*
UPPER N. PLATTE RIVER
COLUMBINE 9400 12.5 12.9 98 29.9 29.7 101
DIVIDE PEAK 8800 20.4 11.5 179 32.8 29.2 113
ELK RIVER 8700 10.9 7.6 143 29.7 23.4 127
JOE WRIGHT 10120 24.2 23.0 106 34.3 32.8 105
NORTH FRENCH CREEK 10100 42.0 26.0 162 40.5 30.4 134
OLD BATTLE 10000 41.4 35.4 117 48.3 37.8 128
SOUTH BRUSH CREEK 8400 10.0 5.5 184 27.2 22.0 124
TOWER 10500 -M 50.2 * -M 46.5 *
WEBBER SPRINGS 9200 20.7 19.4 107 34.9 32.3 109
WILLOW CREEK PASS 9540 14.7 9.9 150 16.5 16.9 98
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Basin wide percent of average 131 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 27.9 23.5 119 32.9 25.7 129
CASPER MTN. 7900 11.6 10.4 113 23.9 21.0 114
DEADMAN HILL 10220 21.4 17.7 121 24.9 23.0 108
DEER PARK 9700 27.2 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 3.3 0 21.4 16.5 130
RENO HILL 8400 13.0 8.0 163 27.0 23.4 116
ROACH 9700 -M 15.0 * 26.7 28.2 96
SAND LAKE 10080 46.3 34.3 136 39.2 26.7 147
SOUTH PASS 9040 24.7 15.9 157 31.0 22.4 139
WINDY PEAK 7840 .2 3.2 4 18.7 14.1 132
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Basin wide percent of average 126 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 23.9 19.9 121
DIVIDE PEAK 8800 20.4 11.5 179 32.8 29.2 113
OLD BATTLE 10000 41.4 35.4 117 48.3 37.8 128
SANDSTONE RS 8150 2.9 2.2 139 27.2 24.7 111
WHISKEY PARK 8950 31.9 23.9 134 39.4 36.3 109
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Basin wide percent of average 133 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 -M 8.7 * -M 19.7 *
BLIND BULL SUM 8650 33.7 21.7 155 28.5 28.4 101
EAST RIM DIVIDE 7930 14.5 12.1 120 18.4 18.4 100
ELKHART PARK G.S. 9400 16.0 9.2 174 19.7 19.4 103
GROS VENTRE SUMMIT 8775 -M 9.0 * -M 19.2 *
KENDALL R.S. 7740 9.1 .0 * 20.4 18.7 110
LOOMIS PARK 8240 -M 10.0 * 25.2 22.7 112
NEW FORK LAKE 8340 10.4 5.5 188 16.4 17.4 95
SNIDER BASIN 8250 16.7 7.5 223 23.2 18.4 127
SPRING CREEK DIVIDE 9000 38.3 25.2 152 36.3 32.4 113
TRIPLE PEAK 8500 30.7 20.5 150 39.2 37.0 106
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Basin wide percent of average 158 107
LOWER GREEN RIVER
HAMS FORK 7840 5.0 .0 * 18.4 16.2 115
HEWINTA 9500 13.5 .0 * 20.5 17.7 116
HICKERSON PARK 9150 5.1 .6 850* 15.5 13.9 112
HOLE-IN-ROCK 9150 8.4 .5 1661* 16.0 13.9 116
INDIAN CREEK 9425 38.7 24.2 161 34.8 30.9 113
KELLEY R.S. 8180 15.1 9.0 170 24.7 22.7 109
STEEL CREEK PARK 10100 23.4 16.2 146 24.7 18.2 136
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Basin wide percent of average 181* 116
UPPER BEAR RIVER
BUG LAKE 7950 23.9 9.2 260 29.5 23.9 124
HAYDEN FORK 9400 14.9 .7 2115* 29.0 24.7 118
KELLEY R.S. 8180 15.1 9.0 170 24.7 22.7 109
LILY LAKE 9050 13.5 5.3 260 25.5 19.7 130
MONTE CRISTO 8960 39.8 20.5 195 38.4 32.2 120
SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 112
TRIAL LAKE 9960 28.9 20.0 145 31.7 30.2 105
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Basin wide percent of average 211 117
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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.