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 TUESDAY: MAY 18 , 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 12.4 4.0 308 30.9 26.7 116
COTTONWOOD CREEK 7600 23.9 11.6 206 36.7 29.9 123
GRANITE CREEK 6770 13.0 6.5 204 27.7 28.5 98
GRASSY LAKE 7265 40.0 24.7 163 49.7 44.4 112
GROS VENTRE SUMMIT 8775 16.5 8.5 197 20.4 19.2 106
LEWIS LAKE DIVIDE 7860 39.3 27.9 141 46.0 45.2 102
PHILLIPS BENCH 8200 33.3 24.0 139 37.3 35.7 105
SALT RIVER SUMMIT 7600 11.4 .0 * 22.9 20.5 112
SNAKE RIVER STATION 6920 10.9 9.5 114 30.4 31.2 98
SPRING CREEK DIVIDE 9000 38.3 24.9 155 36.3 32.5 112
THUMB DIVIDE 7980 18.4 9.4 198 27.9 25.0 112
TOGWOTEE PASS 9580 -M 25.7 * 35.8 33.8 106
TWO OCEAN PLATEAU 9360 43.0 25.7 168 37.2 36.8 101
WILLOW CREEK 8450 33.7 26.4 128 48.9 38.3 128
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Basin wide percent of average 160 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 24.0 122 28.2 23.4 121
BLACK BEAR 7950 58.3 35.4 165 55.4 48.8 114
CANYON 7940 13.1 5.8 230 22.7 17.9 128
FISHER CREEK 9100 43.0 36.4 119 43.8 44.9 98
MADISON PLATEAU 7750 -M 16.9 * 39.0 31.9 123
NORTHEAST ENTRANCE 7350 2.0 2.3 91 17.7 15.5 115
PARKER PEAK 9400 27.9 22.0 127 -M 20.2 *
SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139
THUMB DIVIDE 7980 18.4 9.4 198 27.9 25.0 112
TWO OCEAN PLATEAU 9360 43.0 25.7 168 37.2 36.8 101
WHISKEY CREEK 6800 18.7 8.1 231 30.0 26.4 114
WHITE MILL 8700 31.4 24.0 131 30.2 34.8 87
WOLVERINE 7650 .3 2.5 9 15.7 16.9 94
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Basin wide percent of average 145 111
WIND RIVER
BURROUGHS CREEK 8750 18.9 6.1 310 23.5 21.2 111
COLD SPRINGS 9630 18.7 2.4 776 24.9 14.9 168
DEER PARK 9700 27.2 -M * 34.2 -M *
HOBBS PARK 10100 31.2 15.6 200 29.2 19.4 152
LITTLE WARM 9620 20.2 4.6 437 25.2 18.0 140
SOUTH PASS 9040 24.5 15.5 160 31.2 22.5 139
ST. LAWRENCE ALT 8620 12.0 2.0 600 21.7 13.9 157
TOGWOTEE PASS 9580 -M 25.7 * 35.8 33.8 106
TOWNSEND CREEK 8700 18.2 5.5 338 26.7 17.4 154
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Basin wide percent of average 279 136
BIGHORN BASIN
BALD MTN. 9375 26.5 23.4 114 26.0 23.4 112
BEAR TRAP MEADOW 7900 1.9 1.2 151 18.2 12.5 145
BLACKWATER 9780 37.4 23.9 158 31.2 22.5 139
BONE SPRINGS DIV 9350 23.7 15.2 156 25.5 20.4 126
EVENING STAR 9200 37.5 29.5 128 41.0 28.2 146
GRAVE SPRINGS 8550 11.4 9.5 119 18.9 14.5 130
KIRWIN 9550 18.2 9.4 195 21.4 15.0 144
MARQUETTE 8760 19.2 7.0 275 21.9 15.6 141
MIDDLE POWDER 7760 17.7 12.0 147 23.0 16.7 138
OWL CREEK 8975 11.0 .0 1223 15.5 9.6 161
POWDER RIVER PASS 9480 13.4 5.5 247 22.9 16.7 138
SHELL CREEK 9580 20.4 16.0 128 21.4 18.2 119
SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139
SYLVAN ROAD 8120 -M 3.5 * -M 20.4 *
TIMBER CREEK 7950 11.1 2.2 529 18.4 12.1 153
YOUNTS PEAK 8350 21.4 14.7 145 22.7 21.0 108
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Basin wide percent of average 156 134
SHOSHONE RIVER
BLACKWATER 9780 37.4 23.9 158 31.2 22.5 139
EVENING STAR 9200 37.5 29.5 128 41.0 28.2 146
KIRWIN 9550 18.2 9.4 195 21.4 15.0 144
MARQUETTE 8760 19.2 7.0 275 21.9 15.6 141
SYLVAN LAKE 8420 25.4 19.5 130 33.9 24.5 139
SYLVAN ROAD 8120 -M 3.5 * -M 20.4 *
YOUNTS PEAK 8350 21.4 14.7 145 22.7 21.0 108
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Basin wide percent of average 153 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.9 1.2 151 18.2 12.5 145
BIG GOOSE 7990 10.1 -M * 19.7 -M *
BONE SPRINGS DIV 9350 23.7 15.2 156 25.5 20.4 126
BURGESS JUNCTION 7880 12.5 9.6 130 18.7 16.4 115
CLOUD PEAK RESERVOIR 9860 25.2 14.9 171 25.9 19.5 133
DOME LAKE 8880 -M 9.2 * 18.7 18.5 101
GRAVE SPRINGS 8550 11.4 9.5 119 18.9 14.5 130
HANSEN SAWMILL 8760 4.1 3.5 118 18.0 11.9 153
MIDDLE POWDER 7760 17.7 12.0 147 23.0 16.7 138
POWDER RIVER PASS 9480 13.4 5.5 247 22.9 16.7 138
SUCKER CREEK 8880 16.2 9.5 172 23.2 18.7 125
TIE CREEK 6870 4.3 -M * 19.2 15.6 124
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Basin wide percent of average 156 128
BELLE FOURCHE
BLIND PARK 6890 .5 3.8 11 20.4 16.4 125
NORTH RAPID CREEK 6130 .0 -M * 17.7 -M *
WARREN PEAK 6520 .7 3.9 18 -M 12.0 *
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Basin wide percent of average 15 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 11.6 12.1 96 29.9 29.7 101
DIVIDE PEAK 8800 20.7 11.0 189 33.0 29.4 113
ELK RIVER 8700 10.7 7.1 151 29.7 23.5 127
JOE WRIGHT 10120 24.2 22.7 107 34.4 32.9 105
NORTH FRENCH CREEK 10100 42.2 25.7 165 40.4 30.4 133
OLD BATTLE 10000 41.3 34.8 120 48.5 37.9 128
SOUTH BRUSH CREEK 8400 10.0 5.1 195 27.4 22.2 124
TOWER 10500 -M 49.8 * -M 46.8 *
WEBBER SPRINGS 9200 20.2 18.9 108 35.3 32.4 109
WILLOW CREEK PASS 9540 14.4 9.4 154 16.7 17.0 98
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Basin wide percent of average 134 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.2 22.9 124 33.0 25.7 129
CASPER MTN. 7900 11.0 10.0 111 23.9 21.2 114
DEADMAN HILL 10220 21.7 17.2 126 24.9 23.2 108
DEER PARK 9700 27.2 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 3.0 0 21.4 16.7 129
RENO HILL 8400 12.0 7.6 158 27.2 23.5 116
ROACH 9700 -M 14.5 * 26.9 28.4 95
SAND LAKE 10080 46.3 33.5 138 39.4 26.9 148
SOUTH PASS 9040 24.5 15.5 160 31.2 22.5 139
WINDY PEAK 7840 .0 2.9 0 19.0 14.2 134
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Basin wide percent of average 128 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 24.2 19.9 122
DIVIDE PEAK 8800 20.7 11.0 189 33.0 29.4 113
OLD BATTLE 10000 41.3 34.8 120 48.5 37.9 128
SANDSTONE RS 8150 1.7 1.9 90 27.2 24.7 110
WHISKEY PARK 8950 31.7 23.0 138 39.5 36.4 109
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Basin wide percent of average 136 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.5 8.1 180 19.7 19.7 100
BLIND BULL SUM 8650 33.7 21.4 158 28.5 28.4 101
EAST RIM DIVIDE 7930 14.5 11.7 124 18.4 18.4 100
ELKHART PARK G.S. 9400 16.0 9.0 180 19.9 19.4 103
GROS VENTRE SUMMIT 8775 16.5 8.5 197 20.4 19.2 106
KENDALL R.S. 7740 8.6 .0 * 20.5 18.9 110
LOOMIS PARK 8240 -M 9.5 * 25.4 22.9 111
NEW FORK LAKE 8340 10.0 5.3 191 16.5 17.5 95
SNIDER BASIN 8250 16.0 7.0 229 23.2 18.4 127
SPRING CREEK DIVIDE 9000 38.3 24.9 155 36.3 32.5 112
TRIPLE PEAK 8500 30.9 20.2 154 39.3 37.2 106
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Basin wide percent of average 165 107
LOWER GREEN RIVER
HAMS FORK 7840 3.5 .0 * 18.4 16.2 113
HEWINTA 9500 13.0 .0 * 20.5 17.9 116
HICKERSON PARK 9150 3.9 .5 780* 15.4 14.0 111
HOLE-IN-ROCK 9150 7.3 .5 1441* 16.0 14.0 116
INDIAN CREEK 9425 39.0 23.7 166 34.8 30.9 113
KELLEY R.S. 8180 14.6 8.4 176 24.7 22.7 109
STEEL CREEK PARK 10100 23.4 15.9 149 24.7 18.2 136
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Basin wide percent of average 181* 116
UPPER BEAR RIVER
BUG LAKE 7950 22.9 8.9 260 29.7 23.9 125
HAYDEN FORK 9400 14.0 .6 2334* 29.4 24.9 119
KELLEY R.S. 8180 14.6 8.4 176 24.7 22.7 109
LILY LAKE 9050 12.5 5.0 256 25.5 19.9 129
MONTE CRISTO 8960 41.3 19.9 209 38.4 32.3 120
SALT RIVER SUMMIT 7600 11.4 .0 * 22.9 20.5 112
TRIAL LAKE 9960 28.7 19.5 147 31.7 30.2 105
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Basin wide percent of average 216 117
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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.