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: DECEMBER 18 , 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 8.0 6.3 127 11.0 8.5 129
COTTONWOOD CREEK 7670 11.9 7.4 161 16.3 11.0 148
GRAND TARGHEE 9260 20.6 -M * 15.6 -M *
GRANITE CREEK 6770 7.4 5.7 130 9.9 7.7 129
GRASSY LAKE 7265 13.0 11.5 113 16.1 13.8 117
GROS VENTRE SUMMIT 8750 6.9 5.6 123 6.8 5.5 124
GUNSIGHT PASS 9820 7.2 -M * 7.7 -M *
LEWIS LAKE DIVIDE 7850 14.6 11.5 127 16.5 14.1 117
PHILLIPS BENCH 8200 12.9 9.9 130 14.2 10.7 133
SALT RIVER SUMMIT 7760 6.0 4.1 146 9.8 7.1 138
SNAKE RIVER STATION 6920 6.3 6.2 102 12.0 9.0 133
SPRING CREEK DIVIDE 9000 12.9 10.1 128 13.9 10.4 134
THUMB DIVIDE 7980 8.6 6.0 143 9.5 7.4 128
TOGWOTEE PASS 9580 12.7 9.5 134 13.8 9.9 139
TWO OCEAN PLATEAU 9240 16.6 11.2 148 13.5 11.2 121
WILLOW CREEK 8380 12.9 11.4 113 18.0 12.8 141
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Basin wide percent of average 129 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 10.6 9.5 112 10.3 8.3 124
BLACK BEAR 8170 17.0 13.9 122 18.4 14.4 128
CANYON 7870 6.6 4.8 138 8.1 6.4 127
FISHER CREEK 9100 15.0 13.3 113 15.3 13.9 110
MADISON PLATEAU 7750 10.8 9.0 120 12.8 10.3 124
NORTHEAST ENTRANCE 7350 4.4 3.9 113 6.6 5.4 122
PARKER PEAK 9400 11.8 8.8 134 -M 7.1 *
SYLVAN LAKE 8420 9.6 8.7 110 12.5 9.5 132
THUMB DIVIDE 7980 8.6 6.0 143 9.5 7.4 128
TWO OCEAN PLATEAU 9240 16.6 11.2 148 13.5 11.2 121
WHISKEY CREEK 6800 6.9 5.9 117 9.6 8.1 119
WHITE MILL 8700 10.8 9.3 116 11.6 10.7 108
WOLVERINE 7650 6.1 4.4 139 6.1 6.0 102
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Basin wide percent of average 124 120
WIND RIVER
BURROUGHS CREEK 8750 6.4 5.4 119 6.8 6.6 103
CASTLE CREEK 8400 2.5 -M * 3.0 -M *
COLD SPRINGS 9630 3.5 4.0 88 3.8 5.1 75
DEER PARK 9700 8.8 5.7 154 9.7 9.2 105
HOBBS PARK 10100 6.7 6.7 100 6.2 5.6 111
LITTLE WARM 9370 5.3 4.4 120 5.4 5.8 93
SOUTH PASS 9040 7.0 6.9 101 6.5 7.9 82
ST. LAWRENCE ALT 8620 2.0 3.3 61 3.0 4.2 71
TOGWOTEE PASS 9580 12.7 9.5 134 13.8 9.9 139
TOWNSEND CREEK 8700 3.5 3.8 92 5.6 5.4 104
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Basin wide percent of average 112 102
BIGHORN BASIN
BALD MTN. 9380 8.9 8.0 111 7.9 7.0 113
BEAR TRAP MEADOW 8200 2.3 2.2 105 3.2 4.0 80
BLACKWATER 9780 11.9 10.2 117 11.0 9.4 117
BONE SPRINGS DIV 9350 6.6 6.6 100 6.0 6.2 97
EVENING STAR 9200 13.2 11.5 115 14.5 10.9 133
GRAVE SPRINGS 8550 3.0 3.3 91 3.7 4.3 86
KIRWIN 9550 5.6 5.2 108 6.0 5.1 118
MARQUETTE 8760 1.2 4.4 27 2.9 4.8 60
MIDDLE POWDER 7760 4.6 4.8 96 3.0 6.0 50
OWL CREEK 8975 1.5 2.3 65 1.9 2.6 73
POWDER RIVER PASS 9480 5.2 4.3 121 5.9 5.2 113
SHELL CREEK 9580 6.3 6.3 100 5.6 5.7 98
SYLVAN LAKE 8420 9.6 8.7 110 12.5 9.5 132
SYLVAN ROAD 7120 6.4 5.0 128 9.0 8.8 102
TIMBER CREEK 7950 1.6 2.7 59 2.1 3.4 62
YOUNTS PEAK 8350 7.6 6.4 119 6.8 6.8 100
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Basin wide percent of average 104 102
SHOSHONE RIVER
BLACKWATER 9780 11.9 10.2 117 11.0 9.4 117
EVENING STAR 9200 13.2 11.5 115 14.5 10.9 133
KIRWIN 9550 5.6 5.2 108 6.0 5.1 118
MARQUETTE 8760 1.2 4.4 27 2.9 4.8 60
SYLVAN LAKE 8420 9.6 8.7 110 12.5 9.5 132
SYLVAN ROAD 7120 6.4 5.0 128 9.0 8.8 102
YOUNTS PEAK 8350 7.6 6.4 119 6.8 6.8 100
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Basin wide percent of average 108 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.3 2.2 105 3.2 4.0 80
BIG GOOSE 7990 -M 3.5 * -M 4.0 *
BONE SPRINGS DIV 9350 6.6 6.6 100 6.0 6.2 97
BURGESS JUNCTION 7880 3.0 4.6 65 4.3 5.3 81
CLOUD PEAK RESERVOIR 9860 5.6 4.8 117 5.5 5.7 96
DOME LAKE 8880 2.7 5.1 53 5.1 6.0 85
GRAVE SPRINGS 8550 3.0 3.3 91 3.7 4.3 86
HANSEN SAWMILL 8360 1.6 2.7 59 2.5 3.8 66
LITTLE GOOSE 8870 2.9 -M * 6.4 -M *
MIDDLE POWDER 7760 4.6 4.8 96 3.0 6.0 50
POWDER RIVER PASS 9480 5.2 4.3 121 5.9 5.2 113
SOLDIER PARK 8720 1.3 -M * 3.1 -M *
SUCKER CREEK 8880 4.3 4.2 102 5.1 5.7 89
TIE CREEK 6870 1.8 1.6 113 3.4 4.5 76
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Basin wide percent of average 92 84
BELLE FOURCHE
BLIND PARK 6890 1.8 2.6 69 7.3 5.4 135
COLE CANYON 5910 2.1 2.8 75 4.6 3.5 131
NORTH RAPID CREEK 6130 2.4 2.6 92 6.1 4.6 133
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Basin wide percent of average 79 133
UPPER N. PLATTE RIVER
COLUMBINE 9160 11.4 7.6 150 14.5 9.2 158
DIVIDE PEAK 8880 7.3 7.3 100 10.9 8.3 131
ELK RIVER 8700 6.5 5.2 125 9.9 7.2 138
JOE WRIGHT 10120 11.6 8.1 143 16.6 10.0 166
NORTH FRENCH CREEK 10130 16.0 10.9 147 16.1 9.9 163
OLD BATTLE 10000 15.0 12.3 122 16.7 13.0 128
SAGE CREEK BASIN 7850 4.2 4.2 100 7.5 4.8 156
SOUTH BRUSH CREEK 8440 6.7 4.1 163 9.9 6.6 150
TOWER 10500 20.7 17.1 121 22.5 14.6 154
WEBBER SPRINGS 9250 9.7 9.4 103 14.0 10.7 131
WILLOW CREEK PASS 9540 7.3 4.7 155 8.2 5.6 146
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Basin wide percent of average 128 147
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 10.0 8.6 116 11.8 8.4 140
CASPER MTN. 7900 4.2 6.0 70 7.1 6.4 111
DEADMAN HILL 10220 6.1 6.4 95 10.7 6.7 160
DEER PARK 9700 8.8 5.7 154 9.7 9.2 105
LAPRELE CREEK 8375 3.4 4.4 77 5.0 5.3 94
RENO HILL 8400 5.2 5.6 93 6.9 6.2 111
ROACH 9700 7.5 5.9 127 10.0 7.0 143
SAND LAKE 10050 14.3 12.5 114 13.9 9.6 145
SOUTH PASS 9040 7.0 6.9 101 6.5 7.9 82
WINDY PEAK 7900 2.8 3.1 90 5.3 4.8 110
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Basin wide percent of average 106 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.7 2.8 132 5.9 5.9 100
DIVIDE PEAK 8880 7.3 7.3 100 10.9 8.3 131
OLD BATTLE 10000 15.0 12.3 122 16.7 13.0 128
SANDSTONE RS 8150 3.2 3.8 84 9.7 7.3 133
WHISKEY PARK 8950 -M 8.6 * 14.9 10.8 138
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Basin wide percent of average 111 128
UPPER GREEN RIVER
BIG SANDY OPENING 9080 5.5 5.7 96 6.3 5.6 113
BLIND BULL SUM 8650 11.1 10.5 106 8.1 9.1 89
EAST RIM DIVIDE 7930 4.4 4.7 94 4.9 4.7 104
ELKHART PARK G.S. 9400 4.5 5.1 88 5.2 5.7 91
GROS VENTRE SUMMIT 8750 6.9 5.6 123 6.8 5.5 124
GUNSIGHT PASS 9820 7.2 -M * 7.7 -M *
KENDALL R.S. 7740 4.3 5.1 84 6.2 5.5 113
LOOMIS PARK 8240 6.9 6.5 106 7.8 6.8 115
NEW FORK LAKE 8340 4.3 4.3 100 4.5 4.9 92
POCKET CREEK 9360 4.7 -M * 5.9 -M *
SNIDER BASIN 8060 7.5 5.5 136 8.4 6.4 131
SPRING CREEK DIVIDE 9000 12.9 10.1 128 13.9 10.4 134
TRIPLE PEAK 8500 11.5 9.5 121 13.5 9.1 148
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Basin wide percent of average 110 116
LOWER GREEN RIVER
HAMS FORK 7840 5.0 4.1 122 6.4 4.7 136
HEWINTA 9519 2.9 3.1 94 7.1 6.1 116
HICKERSON PARK 9145 1.3 2.2 59 3.3 3.8 87
HOLE-IN-ROCK 9150 2.2 2.1 105 3.9 3.5 111
INDIAN CREEK 9425 12.8 9.9 129 12.4 9.8 127
KELLEY R.S. 8180 8.0 6.2 129 10.5 8.1 130
STEEL CREEK PARK 10200 5.1 5.5 93 8.4 6.5 129
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Basin wide percent of average 113 122
UPPER BEAR RIVER
BUG LAKE 7950 9.5 6.2 153 12.2 7.7 158
HAYDEN FORK 9212 5.7 4.8 119 12.5 8.3 151
KELLEY R.S. 8180 8.0 6.2 129 10.5 8.1 130
LILY LAKE 9156 6.5 4.3 151 9.5 7.4 128
MONTE CRISTO 8960 12.3 8.2 150 15.3 10.0 153
SALT RIVER SUMMIT 7760 6.0 4.1 146 9.8 7.1 138
TRIAL LAKE 9992 11.9 8.2 145 13.9 9.2 151
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Basin wide percent of average 143 145
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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.