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 10 , 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 14.5 7.0 206 30.0 26.0 116
COTTONWOOD CREEK 7600 22.9 16.2 142 34.9 29.2 120
GRANITE CREEK 6770 14.7 9.5 157 27.2 27.7 99
GRASSY LAKE 7265 39.8 29.7 135 47.9 43.3 111
GROS VENTRE SUMMIT 8775 -M 11.5 * -M 18.7 *
LEWIS LAKE DIVIDE 7860 38.3 31.4 122 44.7 44.0 102
PHILLIPS BENCH 8200 34.0 26.9 127 36.7 34.8 106
SALT RIVER SUMMIT 7600 12.0 3.9 306 21.9 19.9 110
SNAKE RIVER STATION 6920 12.7 13.4 96 29.4 30.4 97
SPRING CREEK DIVIDE 9000 37.2 27.4 136 35.2 31.7 111
THUMB DIVIDE 7980 17.2 12.6 136 25.7 24.4 105
TOGWOTEE PASS 9580 -M 26.9 * 34.2 32.9 104
TWO OCEAN PLATEAU 9360 41.0 26.9 153 35.8 35.8 100
WILLOW CREEK 8450 31.4 29.4 108 46.7 37.4 125
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Basin wide percent of average 135 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.9 25.4 114 27.5 22.4 123
BLACK BEAR 7950 54.7 38.0 144 52.8 47.8 111
CANYON 7940 12.9 8.1 159 21.2 17.2 124
FISHER CREEK 9100 40.8 37.9 108 42.3 43.7 97
MADISON PLATEAU 7750 -M 20.7 * 36.7 30.9 119
NORTHEAST ENTRANCE 7350 3.2 3.8 82 16.7 14.7 113
PARKER PEAK 9400 26.4 23.2 115 -M 19.2 *
SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137
THUMB DIVIDE 7980 17.2 12.6 136 25.7 24.4 105
TWO OCEAN PLATEAU 9360 41.0 26.9 153 35.8 35.8 100
WHISKEY CREEK 6800 18.7 11.6 162 28.4 25.7 111
WHITE MILL 8700 30.7 25.5 121 28.9 33.8 86
WOLVERINE 7650 2.9 5.0 60 15.2 16.2 95
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Basin wide percent of average 126 109
WIND RIVER
BURROUGHS CREEK 8750 18.4 9.1 202 22.2 20.4 109
COLD SPRINGS 9630 18.7 4.3 435 23.9 14.0 171
DEER PARK 9700 25.7 -M * 32.5 -M *
HOBBS PARK 10100 29.9 17.4 173 27.7 18.4 151
LITTLE WARM 9620 20.4 7.3 282 24.2 17.2 141
SOUTH PASS 9040 24.4 17.2 143 30.0 21.7 139
ST. LAWRENCE ALT 8620 13.2 3.5 378 21.0 13.2 160
TOGWOTEE PASS 9580 -M 26.9 * 34.2 32.9 104
TOWNSEND CREEK 8700 18.9 7.5 255 25.7 16.5 156
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Basin wide percent of average 218 136
BIGHORN BASIN
BALD MTN. 9375 24.4 24.4 100 24.0 22.2 109
BEAR TRAP MEADOW 7900 1.0 2.5 41 15.6 11.6 135
BLACKWATER 9780 35.3 25.2 140 29.2 21.7 136
BONE SPRINGS DIV 9350 21.2 17.4 123 23.2 19.4 120
EVENING STAR 9200 36.7 30.5 121 39.9 27.2 148
GRAVE SPRINGS 8550 10.9 11.4 96 17.9 13.6 131
KIRWIN 9550 17.4 10.7 163 20.5 14.2 145
MARQUETTE 8760 16.9 8.0 212 19.4 14.7 132
MIDDLE POWDER 7760 16.7 14.4 117 23.4 15.9 148
OWL CREEK 8975 11.2 1.9 590 -M 9.0 *
POWDER RIVER PASS 9480 11.7 7.8 150 20.9 15.9 133
SHELL CREEK 9580 18.5 17.0 109 19.5 17.2 115
SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137
SYLVAN ROAD 8120 8.5 5.5 156 21.9 19.7 112
TIMBER CREEK 7950 10.6 3.8 279 16.7 11.2 149
YOUNTS PEAK 8350 21.2 16.7 127 21.5 20.2 107
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Basin wide percent of average 131 129
SHOSHONE RIVER
BLACKWATER 9780 35.3 25.2 140 29.2 21.7 136
EVENING STAR 9200 36.7 30.5 121 39.9 27.2 148
KIRWIN 9550 17.4 10.7 163 20.5 14.2 145
MARQUETTE 8760 16.9 8.0 212 19.4 14.7 132
SYLVAN LAKE 8420 24.7 21.9 113 32.0 23.5 137
SYLVAN ROAD 8120 8.5 5.5 156 21.9 19.7 112
YOUNTS PEAK 8350 21.2 16.7 127 21.5 20.2 107
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Basin wide percent of average 136 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.0 2.5 41 15.6 11.6 135
BIG GOOSE 7990 9.5 -M * 17.7 -M *
BONE SPRINGS DIV 9350 21.2 17.4 123 23.2 19.4 120
BURGESS JUNCTION 7880 11.5 12.0 96 17.2 15.5 112
CLOUD PEAK RESERVOIR 9860 24.4 16.7 146 24.4 18.4 133
DOME LAKE 8880 -M 12.0 * 17.4 17.7 99
GRAVE SPRINGS 8550 10.9 11.4 96 17.9 13.6 131
HANSEN SAWMILL 8760 4.0 5.1 79 16.5 11.1 149
MIDDLE POWDER 7760 16.7 14.4 117 23.4 15.9 148
POWDER RIVER PASS 9480 11.7 7.8 150 20.9 15.9 133
SUCKER CREEK 8880 14.4 11.7 123 20.9 17.7 118
TIE CREEK 6870 -M -M * -M 14.9 *
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Basin wide percent of average 117 126
BELLE FOURCHE
BLIND PARK 6890 .2 6.5 2 18.7 15.1 124
NORTH RAPID CREEK 6130 .3 -M * 16.9 -M *
WARREN PEAK 6520 1.2 6.5 19 -M 11.2 *
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Basin wide percent of average 11 124*
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.5 17.0 92 29.2 29.0 101
DIVIDE PEAK 8800 20.2 15.0 135 31.4 28.4 111
ELK RIVER 8700 11.1 11.4 99 28.5 22.9 125
JOE WRIGHT 10120 23.4 24.2 97 32.8 31.7 104
NORTH FRENCH CREEK 10100 41.0 27.7 149 39.8 29.4 136
OLD BATTLE 10000 39.4 37.4 106 46.3 36.9 126
SOUTH BRUSH CREEK 8400 9.9 7.6 129 25.4 21.4 119
TOWER 10500 56.9 51.0 112 48.9 45.2 109
WEBBER SPRINGS 9200 21.9 22.5 97 33.5 31.7 107
WILLOW CREEK PASS 9540 14.9 11.9 126 15.7 16.4 97
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Basin wide percent of average 113 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.9 26.4 110 31.9 24.9 129
CASPER MTN. 7900 12.4 13.6 91 22.9 20.0 115
DEADMAN HILL 10220 21.5 18.9 115 23.9 22.2 108
DEER PARK 9700 25.7 -M * 32.5 -M *
LAPRELE CREEK 8320 .0 4.5 0 20.7 15.7 132
RENO HILL 8400 14.1 10.5 136 26.2 23.0 114
ROACH 9700 -M 16.9 * 25.7 27.2 95
SAND LAKE 10080 46.3 36.2 128 37.7 25.9 146
SOUTH PASS 9040 24.4 17.2 143 30.0 21.7 139
WINDY PEAK 7840 1.9 5.1 36 18.4 13.4 138
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Basin wide percent of average 114 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 1.9 0 22.7 19.2 119
DIVIDE PEAK 8800 20.2 15.0 135 31.4 28.4 111
OLD BATTLE 10000 39.4 37.4 106 46.3 36.9 126
SANDSTONE RS 8150 3.4 5.0 69 25.7 23.9 108
WHISKEY PARK 8950 31.0 26.9 116 37.5 35.3 107
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Basin wide percent of average 110 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.6 11.4 130 18.9 19.2 98
BLIND BULL SUM 8650 32.2 22.7 143 27.4 27.7 99
EAST RIM DIVIDE 7930 14.5 13.5 108 17.7 17.9 99
ELKHART PARK G.S. 9400 15.7 11.5 138 19.2 18.9 102
GROS VENTRE SUMMIT 8775 -M 11.5 * -M 18.7 *
KENDALL R.S. 7740 10.1 3.8 266 19.9 18.4 109
LOOMIS PARK 8240 -M 12.7 * 24.5 22.2 111
NEW FORK LAKE 8340 11.2 7.3 154 16.0 17.0 94
SNIDER BASIN 8250 18.2 10.2 179 22.7 17.9 127
SPRING CREEK DIVIDE 9000 37.2 27.4 136 35.2 31.7 111
TRIPLE PEAK 8500 30.9 22.7 137 37.8 36.3 105
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Basin wide percent of average 142 106
LOWER GREEN RIVER
HAMS FORK 7840 7.5 2.2 353 18.0 15.7 115
HEWINTA 9500 12.5 1.9 653 19.2 17.2 112
HICKERSON PARK 9150 5.3 1.5 347 14.4 13.2 109
HOLE-IN-ROCK 9150 8.2 1.2 684 14.7 13.2 112
INDIAN CREEK 9425 37.9 26.4 144 33.5 30.2 111
KELLEY R.S. 8180 15.5 11.9 131 23.9 22.2 108
STEEL CREEK PARK 10100 21.4 17.5 122 22.9 17.2 133
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Basin wide percent of average 173 114
UPPER BEAR RIVER
BUG LAKE 7950 24.9 12.4 203 28.7 23.4 123
HAYDEN FORK 9400 13.9 2.9 476 27.4 24.0 114
KELLEY R.S. 8180 15.5 11.9 131 23.9 22.2 108
LILY LAKE 9050 12.9 6.8 189 23.9 19.0 126
MONTE CRISTO 8960 39.2 23.5 167 36.8 31.4 118
SALT RIVER SUMMIT 7600 12.0 3.9 306 21.9 19.9 110
TRIAL LAKE 9960 28.0 22.2 127 30.5 29.4 105
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Basin wide percent of average 176 115
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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.