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 3 , 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 15.5 10.0 157 29.7 25.4 117
COTTONWOOD CREEK 7600 22.2 19.2 116 32.8 28.4 116
GRANITE CREEK 6770 16.9 12.2 138 26.9 27.0 100
GRASSY LAKE 7265 39.3 33.0 119 46.8 42.3 111
GROS VENTRE SUMMIT 8775 16.2 13.5 121 18.2 18.4 100
LEWIS LAKE DIVIDE 7860 39.2 33.8 116 43.8 42.9 102
PHILLIPS BENCH 8200 35.7 29.0 123 35.9 33.9 106
SALT RIVER SUMMIT 7600 13.7 9.4 148 21.4 19.4 110
SNAKE RIVER STATION 6920 14.0 15.7 89 28.7 29.7 97
SPRING CREEK DIVIDE 9000 36.4 29.2 126 33.9 31.0 110
THUMB DIVIDE 7980 19.2 14.6 132 25.2 23.9 106
TOGWOTEE PASS 9580 -M 28.0 * 32.9 32.3 103
TWO OCEAN PLATEAU 9360 39.8 27.5 145 35.0 35.0 100
WILLOW CREEK 8450 30.7 31.4 98 44.4 36.5 122
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Basin wide percent of average 122 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.9 25.9 108 27.2 21.5 127
BLACK BEAR 7950 -M 39.4 * 50.5 46.8 108
CANYON 7940 15.0 10.4 145 21.0 16.5 128
FISHER CREEK 9100 -M 38.7 * 41.5 42.7 98
MADISON PLATEAU 7750 -M 23.2 * 35.7 30.2 118
NORTHEAST ENTRANCE 7350 5.0 5.5 91 16.4 14.1 116
PARKER PEAK 9400 26.7 23.7 114 -M 18.5 *
SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139
THUMB DIVIDE 7980 19.2 14.6 132 25.2 23.9 106
TWO OCEAN PLATEAU 9360 39.8 27.5 145 35.0 35.0 100
WHISKEY CREEK 6800 19.7 14.5 137 27.4 25.2 109
WHITE MILL 8700 30.4 26.2 116 28.4 32.9 87
WOLVERINE 7650 7.0 7.5 95 15.0 15.5 98
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Basin wide percent of average 121 109
WIND RIVER
BURROUGHS CREEK 8750 18.7 12.1 155 21.5 19.7 110
COLD SPRINGS 9630 19.4 6.3 307 -M 13.4 *
DEER PARK 9700 26.0 -M * 31.9 -M *
HOBBS PARK 10100 29.2 17.9 163 -M 17.7 *
LITTLE WARM 9620 -M 9.7 * 23.0 16.5 140
SOUTH PASS 9040 24.9 17.9 139 29.4 20.9 141
ST. LAWRENCE ALT 8620 14.1 5.0 283 20.5 12.7 162
TOGWOTEE PASS 9580 -M 28.0 * 32.9 32.3 103
TOWNSEND CREEK 8700 19.4 9.1 214 25.2 15.9 159
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Basin wide percent of average 184 130
BIGHORN BASIN
BALD MTN. 9375 21.9 24.2 91 21.9 21.2 104
BEAR TRAP MEADOW 7900 .9 3.9 21 14.1 11.0 130
BLACKWATER 9780 35.2 25.7 138 28.9 20.9 138
BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.4 117
EVENING STAR 9200 37.0 30.9 121 39.4 26.2 151
GRAVE SPRINGS 8550 10.9 11.6 94 16.7 12.7 132
KIRWIN 9550 16.5 11.5 144 19.2 13.5 143
MARQUETTE 8760 16.9 8.5 199 18.7 13.9 136
MIDDLE POWDER 7760 15.5 14.7 106 21.9 15.1 146
OWL CREEK 8975 10.2 3.2 330 12.4 8.4 149
POWDER RIVER PASS 9480 11.5 10.0 117 19.2 15.0 129
SHELL CREEK 9580 17.5 17.0 103 18.2 16.2 112
SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139
SYLVAN ROAD 8120 10.7 7.5 145 21.5 18.9 114
TIMBER CREEK 7950 10.0 5.5 181 15.1 10.4 147
YOUNTS PEAK 8350 21.5 18.0 120 21.2 19.5 109
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Basin wide percent of average 121 130
SHOSHONE RIVER
BLACKWATER 9780 35.2 25.7 138 28.9 20.9 138
EVENING STAR 9200 37.0 30.9 121 39.4 26.2 151
KIRWIN 9550 16.5 11.5 144 19.2 13.5 143
MARQUETTE 8760 16.9 8.5 199 18.7 13.9 136
SYLVAN LAKE 8420 24.7 23.4 106 31.4 22.7 139
SYLVAN ROAD 8120 10.7 7.5 145 21.5 18.9 114
YOUNTS PEAK 8350 21.5 18.0 120 21.2 19.5 109
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Basin wide percent of average 130 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 3.9 21 14.1 11.0 130
BIG GOOSE 7990 9.5 -M * 16.7 -M *
BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.4 117
BURGESS JUNCTION 7880 10.4 13.2 79 15.5 14.7 106
CLOUD PEAK RESERVOIR 9860 23.2 17.5 133 22.9 17.4 132
DOME LAKE 8880 -M 14.5 * 16.2 16.7 98
GRAVE SPRINGS 8550 10.9 11.6 94 16.7 12.7 132
HANSEN SAWMILL 8760 5.5 6.5 84 15.0 10.5 143
MIDDLE POWDER 7760 15.5 14.7 106 21.9 15.1 146
POWDER RIVER PASS 9480 11.5 10.0 117 19.2 15.0 129
SUCKER CREEK 8880 13.7 13.5 103 19.2 16.9 114
TIE CREEK 6870 -M -M * -M 14.1 *
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Basin wide percent of average 102 123
BELLE FOURCHE
BLIND PARK 6890 .0 9.0 0 17.9 14.1 127
NORTH RAPID CREEK 6130 .6 -M * 16.4 -M *
WARREN PEAK 6520 4.5 9.0 51 13.0 10.5 124
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Basin wide percent of average 26 126
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.5 21.0 79 27.7 28.4 98
DIVIDE PEAK 8800 20.9 18.4 114 30.2 27.7 110
ELK RIVER 8700 13.9 15.1 92 26.9 22.4 121
JOE WRIGHT 10120 22.9 24.7 94 31.2 30.7 102
NORTH FRENCH CREEK 10100 38.9 29.2 134 37.7 28.4 133
OLD BATTLE 10000 37.9 38.2 100 43.9 36.0 122
SOUTH BRUSH CREEK 8400 9.6 10.0 96 23.0 20.9 111
TOWER 10500 55.8 51.2 110 46.8 43.8 107
WEBBER SPRINGS 9200 21.7 25.4 86 32.0 30.9 104
WILLOW CREEK PASS 9540 15.5 13.2 118 15.0 15.6 97
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Basin wide percent of average 104 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.2 28.4 99 30.5 24.2 127
CASPER MTN. 7900 12.6 16.9 75 21.2 19.2 111
DEADMAN HILL 10220 21.9 19.2 115 23.0 21.4 108
DEER PARK 9700 26.0 -M * 31.9 -M *
LAPRELE CREEK 8320 .0 6.0 0 19.9 15.0 133
RENO HILL 8400 15.0 12.9 118 24.7 22.7 109
ROACH 9700 19.4 17.9 109 25.4 26.2 97
SAND LAKE 10080 46.3 37.0 125 37.0 25.2 148
SOUTH PASS 9040 24.9 17.9 139 29.4 20.9 141
WINDY PEAK 7840 5.8 7.3 80 17.9 12.5 143
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Basin wide percent of average 107 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.2 4.3 50 21.9 18.7 118
DIVIDE PEAK 8800 20.9 18.4 114 30.2 27.7 110
OLD BATTLE 10000 37.9 38.2 100 43.9 36.0 122
SANDSTONE RS 8150 6.3 8.9 71 24.7 23.2 107
WHISKEY PARK 8950 31.2 29.0 108 36.0 34.3 105
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Basin wide percent of average 100 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.0 13.5 120 -M 18.7 *
BLIND BULL SUM 8650 32.3 22.7 142 26.7 27.2 99
EAST RIM DIVIDE 7930 14.6 14.6 100 17.2 17.5 98
ELKHART PARK G.S. 9400 16.0 13.5 119 18.2 18.4 99
GROS VENTRE SUMMIT 8775 16.2 13.5 121 18.2 18.4 100
KENDALL R.S. 7740 11.6 9.1 128 19.2 17.9 108
LOOMIS PARK 8240 -M 14.6 * 23.7 21.7 110
NEW FORK LAKE 8340 12.0 8.7 138 15.1 16.7 91
SNIDER BASIN 8250 19.9 12.5 160 22.0 17.4 127
SPRING CREEK DIVIDE 9000 36.4 29.2 126 33.9 31.0 110
TRIPLE PEAK 8500 31.7 24.5 130 36.7 35.3 104
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Basin wide percent of average 128 105
LOWER GREEN RIVER
HAMS FORK 7840 10.0 5.0 203 17.2 15.5 112
HEWINTA 9500 12.6 4.6 274 18.0 16.5 110
HICKERSON PARK 9150 5.8 2.7 224 13.9 12.5 111
HOLE-IN-ROCK 9150 8.6 2.2 410 14.2 12.5 114
INDIAN CREEK 9425 37.3 28.4 132 32.3 29.5 110
KELLEY R.S. 8180 16.7 14.4 117 23.2 21.5 108
STEEL CREEK PARK 10100 20.4 18.7 110 21.7 16.4 133
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Basin wide percent of average 148 113
UPPER BEAR RIVER
BUG LAKE 7950 25.4 15.2 167 27.7 22.9 122
HAYDEN FORK 9400 13.7 5.8 237 25.7 23.4 111
KELLEY R.S. 8180 16.7 14.4 117 23.2 21.5 108
LILY LAKE 9050 13.1 8.4 158 22.7 18.4 125
MONTE CRISTO 8960 37.0 25.7 145 34.8 30.7 114
SALT RIVER SUMMIT 7600 13.7 9.4 148 21.4 19.4 110
TRIAL LAKE 9960 26.2 23.7 111 28.7 28.7 100
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Basin wide percent of average 143 112
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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.