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: DECEMBER 21 , 2010
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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 9.3 6.7 139 12.2 8.9 137
COTTONWOOD CREEK 7670 13.6 7.9 172 18.1 11.5 157
GRAND TARGHEE 9260 22.3 -M * 16.5 -M *
GRANITE CREEK 6770 9.5 6.1 156 12.0 8.1 148
GRASSY LAKE 7265 14.2 12.1 117 17.4 14.5 120
GROS VENTRE SUMMIT 8750 8.0 5.9 136 8.0 5.7 140
GUNSIGHT PASS 9820 8.5 -M * 8.8 -M *
LEWIS LAKE DIVIDE 7850 16.1 12.2 132 18.1 14.9 121
PHILLIPS BENCH 8200 14.7 10.5 140 16.0 11.3 142
SALT RIVER SUMMIT 7760 7.5 4.4 170 11.2 7.5 149
SNAKE RIVER STATION 6920 7.3 6.5 112 13.0 9.5 137
SPRING CREEK DIVIDE 9000 15.2 10.7 142 16.0 10.9 147
THUMB DIVIDE 7980 10.1 6.3 160 10.9 7.8 140
TOGWOTEE PASS 9580 14.1 10.0 141 15.2 10.3 148
TWO OCEAN PLATEAU 9240 18.0 11.7 154 14.6 11.7 125
WILLOW CREEK 8380 14.8 12.0 123 19.9 13.3 150
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Basin wide percent of average 140 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 11.7 9.9 118 11.3 8.7 130
BLACK BEAR 8170 18.6 14.6 127 19.7 15.0 131
CANYON 7870 7.2 5.1 141 8.6 6.7 128
FISHER CREEK 9100 16.6 13.9 119 16.8 14.5 116
MADISON PLATEAU 7750 12.0 9.4 128 14.0 10.7 131
NORTHEAST ENTRANCE 7350 5.2 4.1 127 7.4 5.6 132
PARKER PEAK 9400 12.9 9.1 142 13.1 7.3 179
SYLVAN LAKE 8420 10.7 9.2 116 13.6 9.8 139
THUMB DIVIDE 7980 10.1 6.3 160 10.9 7.8 140
TWO OCEAN PLATEAU 9240 18.0 11.7 154 14.6 11.7 125
WHISKEY CREEK 6800 8.0 6.2 129 10.3 8.5 121
WHITE MILL 8700 12.0 9.7 124 13.0 11.2 116
WOLVERINE 7650 7.0 4.7 149 7.0 6.2 113
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Basin wide percent of average 132 130
WIND RIVER
BURROUGHS CREEK 8750 7.5 5.7 132 7.9 6.9 114
CASTLE CREEK 8400 3.2 -M * 3.9 -M *
COLD SPRINGS 9630 4.4 4.1 107 4.2 5.2 81
DEER PARK 9700 10.7 5.9 181 11.6 9.6 121
HOBBS PARK 10100 7.7 6.9 112 6.9 5.8 119
LITTLE WARM 9370 6.2 4.6 135 6.3 6.0 105
SOUTH PASS 9040 8.7 7.1 123 7.9 8.2 96
ST. LAWRENCE ALT 8620 2.7 3.4 79 3.6 4.3 84
TOGWOTEE PASS 9580 14.1 10.0 141 15.2 10.3 148
TOWNSEND CREEK 8700 4.2 3.9 108 6.0 5.5 109
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Basin wide percent of average 128 113
BIGHORN BASIN
BALD MTN. 9380 9.5 8.4 113 8.5 7.3 116
BEAR TRAP MEADOW 8200 2.8 2.3 122 3.7 4.2 88
BLACKWATER 9780 13.2 10.6 125 12.4 9.7 128
BONE SPRINGS DIV 9350 7.0 6.9 101 6.5 6.4 102
EVENING STAR 9200 14.7 11.9 124 15.9 11.3 141
GRAVE SPRINGS 8550 3.3 3.5 94 3.8 4.4 86
KIRWIN 9550 6.4 5.3 121 6.8 5.3 128
MARQUETTE 8760 1.3 4.5 29 3.1 4.9 63
MIDDLE POWDER 7760 4.8 5.0 96 3.2 6.2 52
OWL CREEK 8975 2.1 2.4 88 2.4 2.7 89
POWDER RIVER PASS 9480 5.7 4.5 127 6.4 5.3 121
SHELL CREEK 9580 6.5 6.5 100 5.7 5.9 97
SYLVAN LAKE 8420 10.7 9.2 116 13.6 9.8 139
SYLVAN ROAD 7120 7.5 5.3 142 10.2 9.1 112
TIMBER CREEK 7950 1.9 2.8 68 2.4 3.5 69
YOUNTS PEAK 8350 8.6 6.7 128 7.9 7.1 111
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Basin wide percent of average 111 109
SHOSHONE RIVER
BLACKWATER 9780 13.2 10.6 125 12.4 9.7 128
EVENING STAR 9200 14.7 11.9 124 15.9 11.3 141
KIRWIN 9550 6.4 5.3 121 6.8 5.3 128
MARQUETTE 8760 1.3 4.5 29 3.1 4.9 63
SYLVAN LAKE 8420 10.7 9.2 116 13.6 9.8 139
SYLVAN ROAD 7120 7.5 5.3 142 10.2 9.1 112
YOUNTS PEAK 8350 8.6 6.7 128 7.9 7.1 111
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Basin wide percent of average 117 122
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.8 2.3 122 3.7 4.2 88
BIG GOOSE 7990 -M 3.7 * 4.0 4.1 98
BONE SPRINGS DIV 9350 7.0 6.9 101 6.5 6.4 102
BURGESS JUNCTION 7880 3.2 4.8 67 4.6 5.4 85
CLOUD PEAK RESERVOIR 9860 6.3 5.0 126 6.5 5.9 110
DOME LAKE 8880 3.1 5.3 58 5.3 6.2 85
GRAVE SPRINGS 8550 3.3 3.5 94 3.8 4.4 86
HANSEN SAWMILL 8360 2.3 2.8 82 2.9 3.9 74
LITTLE GOOSE 8870 3.1 -M * 6.7 -M *
MIDDLE POWDER 7760 4.8 5.0 96 3.2 6.2 52
POWDER RIVER PASS 9480 5.7 4.5 127 6.4 5.3 121
SOLDIER PARK 8720 1.9 -M * 3.5 -M *
SUCKER CREEK 8880 4.6 4.5 102 5.4 5.9 92
TIE CREEK 6870 2.0 1.9 105 3.7 4.6 80
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Basin wide percent of average 97 90
BELLE FOURCHE
BLIND PARK 6890 2.3 2.7 85 7.7 5.6 138
COLE CANYON 5910 2.5 2.8 89 4.9 3.6 136
NORTH RAPID CREEK 6130 2.6 2.7 96 6.5 4.8 135
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Basin wide percent of average 90 136
UPPER N. PLATTE RIVER
COLUMBINE 9160 13.7 8.1 169 16.8 9.6 175
DIVIDE PEAK 8880 9.4 7.7 122 12.5 8.7 144
ELK RIVER 8700 9.0 5.6 161 11.8 7.5 157
JOE WRIGHT 10120 13.8 8.4 164 18.5 10.4 178
NORTH FRENCH CREEK 10130 19.3 11.4 169 19.1 10.4 184
OLD BATTLE 10000 19.2 12.8 150 20.7 13.6 152
SAGE CREEK BASIN 7850 6.0 4.5 133 9.1 5.0 182
SOUTH BRUSH CREEK 8440 8.4 4.3 195 11.6 6.8 171
TOWER 10500 24.9 17.8 140 26.4 15.3 173
WEBBER SPRINGS 9250 13.0 9.9 131 17.3 11.2 154
WILLOW CREEK PASS 9540 9.1 4.9 186 9.8 5.8 169
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Basin wide percent of average 153 166
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 13.3 9.0 148 14.7 8.8 167
CASPER MTN. 7900 4.8 6.2 77 7.6 6.6 115
DEADMAN HILL 10220 7.3 6.7 109 12.5 6.9 181
DEER PARK 9700 10.7 5.9 181 11.6 9.6 121
LAPRELE CREEK 8375 4.6 4.6 100 5.9 5.5 107
RENO HILL 8400 6.0 5.8 103 7.9 6.4 123
ROACH 9700 9.6 6.2 155 12.5 7.3 171
SAND LAKE 10050 17.3 13.0 133 16.9 10.0 169
SOUTH PASS 9040 8.7 7.1 123 7.9 8.2 96
WINDY PEAK 7900 3.7 3.2 116 6.2 4.9 127
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Basin wide percent of average 127 140
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.1 3.1 165 7.3 6.1 120
DIVIDE PEAK 8880 9.4 7.7 122 12.5 8.7 144
OLD BATTLE 10000 19.2 12.8 150 20.7 13.6 152
SANDSTONE RS 8150 5.2 4.1 127 11.7 7.6 154
WHISKEY PARK 8950 -M 9.1 * 17.9 11.3 158
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Basin wide percent of average 140 148
UPPER GREEN RIVER
BIG SANDY OPENING 9080 6.9 5.9 117 7.6 5.8 131
BLIND BULL SUM 8650 13.2 11.1 119 9.9 9.5 104
EAST RIM DIVIDE 7930 5.8 5.0 116 6.2 4.9 127
ELKHART PARK G.S. 9400 5.6 5.3 106 6.2 5.9 105
GROS VENTRE SUMMIT 8750 8.0 5.9 136 8.0 5.7 140
GUNSIGHT PASS 9820 8.5 -M * 8.8 -M *
KENDALL R.S. 7740 5.9 5.4 109 7.7 5.8 133
LOOMIS PARK 8240 8.7 6.8 128 9.7 7.1 137
NEW FORK LAKE 8340 5.4 4.5 120 5.4 5.1 106
POCKET CREEK 9360 5.7 -M * 6.9 -M *
SNIDER BASIN 8060 9.0 5.8 155 9.8 6.7 146
SPRING CREEK DIVIDE 9000 15.2 10.7 142 16.0 10.9 147
TRIPLE PEAK 8500 13.5 10.0 135 15.5 9.5 163
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Basin wide percent of average 127 133
LOWER GREEN RIVER
HAMS FORK 7840 6.5 4.4 148 7.3 5.0 146
HEWINTA 9519 4.9 3.3 148 8.9 6.3 141
HICKERSON PARK 9145 2.4 2.4 100 4.4 3.9 113
HOLE-IN-ROCK 9150 2.7 2.2 123 4.8 3.6 133
INDIAN CREEK 9425 15.0 10.5 143 14.2 10.3 138
KELLEY R.S. 8180 9.8 6.5 151 12.4 8.5 146
STEEL CREEK PARK 10200 7.3 5.7 128 10.4 6.7 155
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Basin wide percent of average 139 141
UPPER BEAR RIVER
BUG LAKE 7950 13.4 6.7 200 15.8 8.0 198
HAYDEN FORK 9212 9.3 5.1 182 15.6 8.6 181
KELLEY R.S. 8180 9.8 6.5 151 12.4 8.5 146
LILY LAKE 9156 9.0 4.5 200 11.7 7.6 154
MONTE CRISTO 8960 16.0 8.8 182 18.2 10.4 175
SALT RIVER SUMMIT 7760 7.5 4.4 170 11.2 7.5 149
TRIAL LAKE 9992 17.5 8.7 201 18.2 9.6 190
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Basin wide percent of average 185 171
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
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 1971-2000.
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.