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 SATURDAY: MAY 15 , 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 12.6 5.0 258 30.2 26.5 114
COTTONWOOD CREEK 7600 23.7 14.1 169 36.3 29.7 123
GRANITE CREEK 6770 13.5 7.5 182 27.5 28.2 98
GRASSY LAKE 7265 39.3 27.4 144 48.7 43.9 111
GROS VENTRE SUMMIT 8775 -M 10.2 * -M 19.2 *
LEWIS LAKE DIVIDE 7860 38.5 29.7 130 45.3 44.8 102
PHILLIPS BENCH 8200 33.8 25.4 133 36.9 35.3 105
SALT RIVER SUMMIT 7600 11.9 .2 11801* 22.5 20.2 112
SNAKE RIVER STATION 6920 11.4 11.6 98 29.7 30.9 96
SPRING CREEK DIVIDE 9000 37.8 26.2 145 35.8 32.3 112
THUMB DIVIDE 7980 17.4 11.4 154 26.5 24.9 107
TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.5 103
TWO OCEAN PLATEAU 9360 41.8 26.4 158 36.2 36.4 100
WILLOW CREEK 8450 32.8 27.9 118 48.3 38.0 127
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Basin wide percent of average 148 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.4 25.0 118 27.7 23.0 121
BLACK BEAR 7950 57.4 37.2 155 54.8 48.4 114
CANYON 7940 13.1 6.6 199 22.4 17.5 128
FISHER CREEK 9100 42.8 37.5 115 43.5 44.4 98
MADISON PLATEAU 7750 -M 19.0 * 38.8 31.5 123
NORTHEAST ENTRANCE 7350 2.7 2.8 97 17.5 15.1 116
PARKER PEAK 9400 27.2 22.9 120 -M 19.7 *
SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136
THUMB DIVIDE 7980 17.4 11.4 154 26.5 24.9 107
TWO OCEAN PLATEAU 9360 41.8 26.4 158 36.2 36.4 100
WHISKEY CREEK 6800 19.2 9.6 199 29.9 26.2 115
WHITE MILL 8700 31.4 25.0 126 29.7 34.5 87
WOLVERINE 7650 .7 3.2 23 15.5 16.7 94
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Basin wide percent of average 135 110
WIND RIVER
BURROUGHS CREEK 8750 17.9 7.0 256 22.4 20.9 107
COLD SPRINGS 9630 18.2 2.9 625 24.0 14.5 166
DEER PARK 9700 26.9 -M * 33.5 -M *
HOBBS PARK 10100 30.4 17.0 179 28.2 19.0 149
LITTLE WARM 9620 20.2 5.5 368 24.5 17.7 139
SOUTH PASS 9040 24.7 16.7 149 30.7 22.2 139
ST. LAWRENCE ALT 8620 12.0 2.5 481 21.4 13.6 157
TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.5 103
TOWNSEND CREEK 8700 18.0 6.1 296 26.0 17.0 153
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Basin wide percent of average 246 134
BIGHORN BASIN
BALD MTN. 9375 25.7 24.5 105 25.2 22.9 111
BEAR TRAP MEADOW 7900 1.2 1.5 74 16.9 12.1 139
BLACKWATER 9780 35.8 24.9 144 29.7 22.2 134
BONE SPRINGS DIV 9350 22.7 16.7 136 24.4 20.0 122
EVENING STAR 9200 37.3 30.4 123 40.3 27.9 145
GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.2 130
KIRWIN 9550 17.4 10.2 170 20.7 14.7 141
MARQUETTE 8760 17.4 7.8 226 20.0 15.4 131
MIDDLE POWDER 7760 17.4 14.1 124 23.2 16.4 142
OWL CREEK 8975 10.5 1.2 946 14.5 9.4 156
POWDER RIVER PASS 9480 12.9 6.3 204 22.2 16.4 136
SHELL CREEK 9580 20.2 17.0 119 21.0 17.7 119
SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136
SYLVAN ROAD 8120 7.0 4.1 171 22.2 20.2 110
TIMBER CREEK 7950 10.2 2.5 409 16.9 11.9 144
YOUNTS PEAK 8350 20.9 16.0 132 21.9 20.7 106
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Basin wide percent of average 140 130
SHOSHONE RIVER
BLACKWATER 9780 35.8 24.9 144 29.7 22.2 134
EVENING STAR 9200 37.3 30.4 123 40.3 27.9 145
KIRWIN 9550 17.4 10.2 170 20.7 14.7 141
MARQUETTE 8760 17.4 7.8 226 20.0 15.4 131
SYLVAN LAKE 8420 24.4 20.7 118 32.8 24.2 136
SYLVAN ROAD 8120 7.0 4.1 171 22.2 20.2 110
YOUNTS PEAK 8350 20.9 16.0 132 21.9 20.7 106
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Basin wide percent of average 141 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.2 1.5 74 16.9 12.1 139
BIG GOOSE 7990 10.0 -M * 18.9 -M *
BONE SPRINGS DIV 9350 22.7 16.7 136 24.4 20.0 122
BURGESS JUNCTION 7880 11.6 11.2 104 17.9 16.0 112
CLOUD PEAK RESERVOIR 9860 24.7 16.2 153 25.2 19.0 133
DOME LAKE 8880 -M 10.5 * 18.2 18.2 100
GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.2 130
HANSEN SAWMILL 8760 3.8 4.1 91 17.2 11.6 149
MIDDLE POWDER 7760 17.4 14.1 124 23.2 16.4 142
POWDER RIVER PASS 9480 12.9 6.3 204 22.2 16.4 136
SUCKER CREEK 8880 15.1 10.5 144 22.0 18.4 120
TIE CREEK 6870 3.3 -M * 18.0 15.4 118
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Basin wide percent of average 131 126
BELLE FOURCHE
BLIND PARK 6890 .5 4.8 9 20.0 15.9 127
NORTH RAPID CREEK 6130 .0 -M * 17.5 -M *
WARREN PEAK 6520 1.0 4.8 22 -M 11.7 *
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Basin wide percent of average 15 127*
UPPER N. PLATTE RIVER
COLUMBINE 9400 14.0 14.2 99 29.7 29.4 102
DIVIDE PEAK 8800 20.2 12.5 162 32.8 28.9 114
ELK RIVER 8700 11.5 8.6 133 29.5 23.2 128
JOE WRIGHT 10120 23.9 23.9 101 33.9 32.4 105
NORTH FRENCH CREEK 10100 41.4 26.9 155 40.3 30.0 135
OLD BATTLE 10000 41.2 37.0 112 48.2 37.5 129
SOUTH BRUSH CREEK 8400 10.2 6.0 170 26.7 21.9 122
TOWER 10500 -M 50.9 * -M 46.2 *
WEBBER SPRINGS 9200 20.9 20.7 102 34.8 32.2 109
WILLOW CREEK PASS 9540 15.2 10.9 141 16.5 16.9 99
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Basin wide percent of average 124 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.5 25.0 115 32.7 25.4 129
CASPER MTN. 7900 12.5 11.2 112 23.9 20.7 115
DEADMAN HILL 10220 21.9 18.7 117 24.4 22.7 108
DEER PARK 9700 26.9 -M * 33.5 -M *
LAPRELE CREEK 8320 .0 3.5 0 21.0 16.4 129
RENO HILL 8400 14.0 8.7 161 26.9 23.4 116
ROACH 9700 -M 16.2 * 26.4 27.9 95
SAND LAKE 10080 46.3 35.5 131 38.8 26.5 147
SOUTH PASS 9040 24.7 16.7 149 30.7 22.2 139
WINDY PEAK 7840 .2 3.7 3 18.4 13.9 134
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Basin wide percent of average 121 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .2 0* 23.9 19.7 122
DIVIDE PEAK 8800 20.2 12.5 162 32.8 28.9 114
OLD BATTLE 10000 41.2 37.0 112 48.2 37.5 129
SANDSTONE RS 8150 3.8 2.4 155 26.9 24.4 111
WHISKEY PARK 8950 31.7 25.4 125 39.2 36.0 109
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Basin wide percent of average 125 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.0 10.0 152 19.5 19.5 100
BLIND BULL SUM 8650 33.3 22.5 148 28.2 28.2 100
EAST RIM DIVIDE 7930 14.5 12.9 113 18.0 18.2 99
ELKHART PARK G.S. 9400 16.0 10.0 162 19.4 19.2 102
GROS VENTRE SUMMIT 8775 -M 10.2 * -M 19.2 *
KENDALL R.S. 7740 8.9 .0 * 20.0 18.7 108
LOOMIS PARK 8240 -M 11.5 * 24.9 22.5 111
NEW FORK LAKE 8340 10.4 6.3 164 16.2 17.4 94
SNIDER BASIN 8250 16.9 8.6 196 22.9 18.2 126
SPRING CREEK DIVIDE 9000 37.8 26.2 145 35.8 32.3 112
TRIPLE PEAK 8500 30.7 21.4 144 38.7 36.8 105
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Basin wide percent of average 149 106
LOWER GREEN RIVER
HAMS FORK 7840 5.5 .2 5401* 18.4 16.0 115
HEWINTA 9500 13.0 .0 * 20.4 17.7 116
HICKERSON PARK 9150 4.5 .7 629* 15.4 13.7 112
HOLE-IN-ROCK 9150 8.0 .5 1600* 16.0 13.7 117
INDIAN CREEK 9425 38.7 25.0 155 34.4 30.7 113
KELLEY R.S. 8180 15.0 10.1 148 24.4 22.5 109
STEEL CREEK PARK 10100 23.4 16.7 140 24.5 17.9 138
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Basin wide percent of average 179* 117
UPPER BEAR RIVER
BUG LAKE 7950 23.7 10.2 232 29.4 23.7 124
HAYDEN FORK 9400 14.1 .9 1763* 29.0 24.5 119
KELLEY R.S. 8180 15.0 10.1 148 24.4 22.5 109
LILY LAKE 9050 13.1 5.8 226 25.4 19.5 131
MONTE CRISTO 8960 40.3 22.0 184 37.9 31.9 119
SALT RIVER SUMMIT 7600 11.9 .2 11801* 22.5 20.2 112
TRIAL LAKE 9960 28.9 21.2 137 31.5 29.9 106
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Basin wide percent of average 210 117
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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.