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: DECEMBER 13 , 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 7.7 5.7 135 10.4 7.9 132
COTTONWOOD CREEK 7670 11.2 6.6 170 15.3 10.1 151
GRAND TARGHEE 9260 19.5 -M * 14.6 -M *
GRANITE CREEK 6770 7.1 5.0 142 9.6 7.0 137
GRASSY LAKE 7265 11.8 10.4 113 15.2 12.5 122
GROS VENTRE SUMMIT 8750 6.5 5.1 127 6.7 5.1 131
GUNSIGHT PASS 9820 7.0 -M * 7.3 -M *
LEWIS LAKE DIVIDE 7850 13.3 10.4 128 15.6 12.9 121
PHILLIPS BENCH 8200 12.2 8.9 137 13.8 9.8 141
SALT RIVER SUMMIT 7760 5.7 3.7 154 9.3 6.5 143
SNAKE RIVER STATION 6920 6.2 5.6 111 11.2 8.3 135
SPRING CREEK DIVIDE 9000 12.1 9.2 132 13.1 9.5 138
THUMB DIVIDE 7980 8.1 5.4 150 9.0 6.8 132
TOGWOTEE PASS 9580 12.1 8.8 138 13.1 9.2 142
TWO OCEAN PLATEAU 9240 15.4 10.4 148 12.2 10.4 117
WILLOW CREEK 8380 11.6 10.3 113 16.7 11.8 142
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Basin wide percent of average 134 134
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 9.9 8.7 114 9.9 7.6 130
BLACK BEAR 8170 15.9 12.8 124 17.4 13.2 132
CANYON 7870 6.1 4.4 139 7.6 6.0 127
FISHER CREEK 9100 13.6 12.3 111 14.3 12.7 113
MADISON PLATEAU 7750 9.9 8.3 119 12.0 9.5 126
NORTHEAST ENTRANCE 7350 4.0 3.5 114 6.3 5.0 126
PARKER PEAK 9400 11.0 8.3 133 11.6 6.7 173
SYLVAN LAKE 8420 8.5 8.1 105 11.2 8.8 127
THUMB DIVIDE 7980 8.1 5.4 150 9.0 6.8 132
TWO OCEAN PLATEAU 9240 15.4 10.4 148 12.2 10.4 117
WHISKEY CREEK 6800 6.4 5.3 121 9.1 7.5 121
WHITE MILL 8700 9.8 8.6 114 11.2 9.9 113
WOLVERINE 7650 5.7 4.1 139 6.2 5.6 111
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Basin wide percent of average 124 126
WIND RIVER
BURROUGHS CREEK 8750 5.7 5.1 112 6.2 6.1 102
CASTLE CREEK 8400 2.6 -M * 3.4 -M *
COLD SPRINGS 9630 3.6 3.8 95 3.7 4.8 77
DEER PARK 9700 8.7 5.2 167 9.7 8.6 113
HOBBS PARK 10100 6.6 6.4 103 6.2 5.3 117
LITTLE WARM 9370 4.8 4.3 112 4.9 5.5 89
SOUTH PASS 9040 7.0 6.6 106 6.6 7.4 89
ST. LAWRENCE ALT 8620 2.4 3.2 75 3.1 4.0 78
TOGWOTEE PASS 9580 12.1 8.8 138 13.1 9.2 142
TOWNSEND CREEK 8700 3.8 3.6 106 5.6 5.2 108
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Basin wide percent of average 116 105
BIGHORN BASIN
BALD MTN. 9380 8.5 7.3 116 7.4 6.5 114
BEAR TRAP MEADOW 8200 2.1 2.0 105 3.3 3.9 85
BLACKWATER 9780 11.0 9.7 113 10.6 8.8 120
BONE SPRINGS DIV 9350 5.9 6.2 95 5.0 5.8 86
EVENING STAR 9200 12.1 10.8 112 13.7 10.1 136
GRAVE SPRINGS 8550 2.9 3.0 97 3.4 4.1 83
KIRWIN 9550 5.6 5.0 112 6.2 4.8 129
MARQUETTE 8760 1.4 4.2 33 3.1 4.6 67
MIDDLE POWDER 7760 4.4 4.2 105 3.0 5.7 53
OWL CREEK 8975 1.8 2.2 82 2.3 2.5 92
POWDER RIVER PASS 9480 4.8 4.0 120 5.8 4.9 118
SHELL CREEK 9580 5.9 5.8 102 5.0 5.4 93
SYLVAN LAKE 8420 8.5 8.1 105 11.2 8.8 127
SYLVAN ROAD 7120 5.2 4.7 111 8.0 8.2 98
TIMBER CREEK 7950 1.9 2.6 73 2.3 3.3 70
YOUNTS PEAK 8350 7.4 6.0 123 6.8 6.3 108
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Basin wide percent of average 104 104
SHOSHONE RIVER
BLACKWATER 9780 11.0 9.7 113 10.6 8.8 120
EVENING STAR 9200 12.1 10.8 112 13.7 10.1 136
KIRWIN 9550 5.6 5.0 112 6.2 4.8 129
MARQUETTE 8760 1.4 4.2 33 3.1 4.6 67
SYLVAN LAKE 8420 8.5 8.1 105 11.2 8.8 127
SYLVAN ROAD 7120 5.2 4.7 111 8.0 8.2 98
YOUNTS PEAK 8350 7.4 6.0 123 6.8 6.3 108
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Basin wide percent of average 106 116
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.1 2.0 105 3.3 3.9 85
BIG GOOSE 7990 2.2 3.1 71 3.8 3.7 103
BONE SPRINGS DIV 9350 5.9 6.2 95 5.0 5.8 86
BURGESS JUNCTION 7880 3.0 4.1 73 4.5 5.0 90
CLOUD PEAK RESERVOIR 9860 5.6 4.4 127 6.3 5.5 115
DOME LAKE 8880 2.7 4.8 56 4.7 5.7 82
GRAVE SPRINGS 8550 2.9 3.0 97 3.4 4.1 83
HANSEN SAWMILL 8360 2.0 2.5 80 2.5 3.7 68
LITTLE GOOSE 8870 2.7 -M * 6.4 -M *
MIDDLE POWDER 7760 4.4 4.2 105 3.0 5.7 53
POWDER RIVER PASS 9480 4.8 4.0 120 5.8 4.9 118
SOLDIER PARK 8720 1.7 -M * 3.3 -M *
SUCKER CREEK 8880 4.3 3.9 110 4.5 5.4 83
TIE CREEK 6870 2.0 1.4 143 3.6 4.3 84
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Basin wide percent of average 96 87
BELLE FOURCHE
BLIND PARK 6890 2.1 2.3 91 7.3 5.1 143
COLE CANYON 5910 2.6 2.6 100 4.5 3.3 136
NORTH RAPID CREEK 6130 2.5 2.3 109 6.4 4.4 145
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Basin wide percent of average 100 142
UPPER N. PLATTE RIVER
COLUMBINE 9160 11.1 6.8 163 14.2 8.4 169
DIVIDE PEAK 8880 7.1 6.6 108 10.7 7.7 139
ELK RIVER 8700 6.1 4.5 136 9.6 6.6 145
JOE WRIGHT 10120 11.0 7.5 147 15.8 9.4 168
NORTH FRENCH CREEK 10130 15.5 10.0 155 15.9 9.2 173
OLD BATTLE 10000 14.2 11.4 125 16.2 11.9 136
SAGE CREEK BASIN 7850 4.2 3.8 111 7.3 4.5 162
SOUTH BRUSH CREEK 8440 6.6 3.8 174 9.8 6.2 158
TOWER 10500 19.5 15.8 123 21.6 13.5 160
WEBBER SPRINGS 9250 9.2 8.6 107 13.5 9.8 138
WILLOW CREEK PASS 9540 6.8 4.4 155 7.8 5.2 150
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Basin wide percent of average 134 154
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 10.0 7.8 128 11.5 7.7 149
CASPER MTN. 7900 3.5 5.6 63 6.2 6.1 102
DEADMAN HILL 10220 6.5 6.0 108 10.6 6.3 168
DEER PARK 9700 8.7 5.2 167 9.7 8.6 113
LAPRELE CREEK 8375 3.4 4.0 85 4.8 5.0 96
RENO HILL 8400 4.7 5.2 90 6.6 5.9 112
ROACH 9700 7.1 5.4 131 9.7 6.5 149
SAND LAKE 10050 14.0 11.5 122 13.7 8.9 154
SOUTH PASS 9040 7.0 6.6 106 6.6 7.4 89
WINDY PEAK 7900 2.7 2.9 93 5.1 4.5 113
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Basin wide percent of average 112 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.3 2.5 132 5.8 5.4 107
DIVIDE PEAK 8880 7.1 6.6 108 10.7 7.7 139
OLD BATTLE 10000 14.2 11.4 125 16.2 11.9 136
SANDSTONE RS 8150 3.1 3.4 91 9.3 6.8 137
WHISKEY PARK 8950 4.7 7.9 59 14.2 10.0 142
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Basin wide percent of average 102 134
UPPER GREEN RIVER
BIG SANDY OPENING 9080 5.6 5.2 108 6.3 5.2 121
BLIND BULL SUM 8650 10.5 9.5 111 7.6 8.4 90
EAST RIM DIVIDE 7930 4.3 4.3 100 4.7 4.3 109
ELKHART PARK G.S. 9400 4.4 4.6 96 4.9 5.3 92
GROS VENTRE SUMMIT 8750 6.5 5.1 127 6.7 5.1 131
GUNSIGHT PASS 9820 7.0 -M * 7.3 -M *
KENDALL R.S. 7740 4.1 4.5 91 6.0 5.1 118
LOOMIS PARK 8240 6.6 5.9 112 7.5 6.2 121
NEW FORK LAKE 8340 4.2 3.8 111 4.4 4.6 96
POCKET CREEK 9360 4.6 -M * 5.8 -M *
SNIDER BASIN 8060 7.3 4.9 149 8.2 5.8 141
SPRING CREEK DIVIDE 9000 12.1 9.2 132 13.1 9.5 138
TRIPLE PEAK 8500 10.7 8.6 124 12.9 8.3 155
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Basin wide percent of average 116 121
LOWER GREEN RIVER
HAMS FORK 7840 4.7 3.6 131 6.0 4.4 136
HEWINTA 9519 2.9 2.8 104 6.8 5.8 117
HICKERSON PARK 9145 1.4 2.0 70 3.4 3.6 94
HOLE-IN-ROCK 9150 1.6 1.9 84 3.9 3.3 118
INDIAN CREEK 9425 12.2 9.0 136 11.8 9.0 131
KELLEY R.S. 8180 7.6 5.6 136 10.2 7.4 138
STEEL CREEK PARK 10200 4.9 5.0 98 8.1 6.1 133
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Basin wide percent of average 118 127
UPPER BEAR RIVER
BUG LAKE 7950 8.7 5.6 155 11.6 7.1 163
HAYDEN FORK 9212 5.6 4.2 133 12.0 7.7 156
KELLEY R.S. 8180 7.6 5.6 136 10.2 7.4 138
LILY LAKE 9156 6.1 3.9 156 9.2 6.9 133
MONTE CRISTO 8960 11.5 7.2 160 14.0 9.2 152
SALT RIVER SUMMIT 7760 5.7 3.7 154 9.3 6.5 143
TRIAL LAKE 9992 11.3 7.4 153 13.4 8.4 160
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Basin wide percent of average 150 150
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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.