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 4 , 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 6.4 4.5 142 9.1 6.6 138
COTTONWOOD CREEK 7670 9.4 5.1 184 13.3 8.5 156
GRAND TARGHEE 9260 17.3 -M * 12.9 -M *
GRANITE CREEK 6770 5.7 3.8 150 8.2 5.8 141
GRASSY LAKE 7265 9.7 8.3 117 13.0 10.4 125
GROS VENTRE SUMMIT 8750 5.5 4.2 131 5.5 4.5 122
GUNSIGHT PASS 9820 5.6 -M * 6.0 -M *
LEWIS LAKE DIVIDE 7850 10.9 8.4 130 13.3 10.7 124
PHILLIPS BENCH 8200 10.5 7.0 150 11.8 8.0 148
SALT RIVER SUMMIT 7760 4.6 2.9 159 7.9 5.3 149
SNAKE RIVER STATION 6920 5.5 4.4 125 10.0 6.9 145
SPRING CREEK DIVIDE 9000 10.0 7.4 135 11.1 7.9 141
THUMB DIVIDE 7980 6.7 4.4 152 7.7 5.8 133
TOGWOTEE PASS 9580 10.2 7.5 136 11.1 7.8 142
TWO OCEAN PLATEAU 9240 13.3 8.8 151 10.5 8.8 119
WILLOW CREEK 8380 9.8 8.3 118 14.7 10.0 147
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Basin wide percent of average 139 138
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 8.4 7.5 112 8.4 6.3 133
BLACK BEAR 8170 13.1 10.5 125 14.9 11.2 133
CANYON 7870 5.4 3.6 150 6.6 5.1 129
FISHER CREEK 9100 11.7 10.1 116 12.6 10.5 120
MADISON PLATEAU 7750 8.1 6.8 119 10.2 7.8 131
NORTHEAST ENTRANCE 7350 3.2 2.8 114 5.4 4.3 126
PARKER PEAK 9400 9.3 7.1 131 8.9 5.8 153
SYLVAN LAKE 8420 6.9 6.9 100 9.5 7.6 125
THUMB DIVIDE 7980 6.7 4.4 152 7.7 5.8 133
TWO OCEAN PLATEAU 9240 13.3 8.8 151 10.5 8.8 119
WHISKEY CREEK 6800 4.9 4.3 114 7.8 6.3 124
WHITE MILL 8700 8.4 7.1 118 9.4 8.3 113
WOLVERINE 7650 4.6 3.3 139 5.2 4.8 108
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Basin wide percent of average 125 126
WIND RIVER
BURROUGHS CREEK 8750 -M 4.2 * 5.1 5.2 98
CASTLE CREEK 8400 2.0 -M * 2.6 -M *
COLD SPRINGS 9630 3.0 3.3 91 3.1 4.4 70
DEER PARK 9700 7.9 4.7 168 8.6 7.5 115
HOBBS PARK 10100 6.2 5.5 113 5.4 4.8 113
LITTLE WARM 9370 4.1 3.6 114 3.9 4.8 81
SOUTH PASS 9040 6.2 5.2 119 6.1 6.4 95
ST. LAWRENCE ALT 8620 1.9 2.8 68 2.8 3.6 78
TOGWOTEE PASS 9580 10.2 7.5 136 11.1 7.8 142
TOWNSEND CREEK 8700 3.5 3.1 113 5.3 4.7 113
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Basin wide percent of average 120 104
BIGHORN BASIN
BALD MTN. 9380 6.9 6.3 110 6.2 5.6 111
BEAR TRAP MEADOW 8200 1.6 1.8 89 2.9 3.5 83
BLACKWATER 9780 9.1 8.4 108 8.3 7.6 109
BONE SPRINGS DIV 9350 5.2 5.6 93 4.1 5.1 80
EVENING STAR 9200 9.7 9.2 105 11.0 8.7 126
GRAVE SPRINGS 8550 2.7 2.7 100 3.3 3.7 89
KIRWIN 9550 4.8 4.4 109 5.1 4.3 119
MARQUETTE 8760 1.1 3.9 28 2.4 4.2 57
MIDDLE POWDER 7760 4.0 3.8 105 2.7 5.1 53
OWL CREEK 8975 1.5 2.0 75 2.0 2.3 87
POWDER RIVER PASS 9480 4.0 3.6 111 4.8 4.3 112
SHELL CREEK 9580 5.0 5.3 94 4.4 4.7 94
SYLVAN LAKE 8420 6.9 6.9 100 9.5 7.6 125
SYLVAN ROAD 7120 4.1 3.9 105 6.7 7.0 96
TIMBER CREEK 7950 1.6 2.4 67 2.1 3.1 68
YOUNTS PEAK 8350 6.3 5.2 121 5.5 5.5 100
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Basin wide percent of average 99 98
SHOSHONE RIVER
BLACKWATER 9780 9.1 8.4 108 8.3 7.6 109
EVENING STAR 9200 9.7 9.2 105 11.0 8.7 126
KIRWIN 9550 4.8 4.4 109 5.1 4.3 119
MARQUETTE 8760 1.1 3.9 28 2.4 4.2 57
SYLVAN LAKE 8420 6.9 6.9 100 9.5 7.6 125
SYLVAN ROAD 7120 4.1 3.9 105 6.7 7.0 96
YOUNTS PEAK 8350 6.3 5.2 121 5.5 5.5 100
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Basin wide percent of average 100 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.6 1.8 89 2.9 3.5 83
BIG GOOSE 7990 1.4 2.5 56 3.0 3.2 94
BONE SPRINGS DIV 9350 5.2 5.6 93 4.1 5.1 80
BURGESS JUNCTION 7880 2.4 3.7 65 3.8 4.4 86
CLOUD PEAK RESERVOIR 9860 4.7 4.0 118 4.9 5.1 96
DOME LAKE 8880 2.0 4.4 45 4.0 5.1 78
GRAVE SPRINGS 8550 2.7 2.7 100 3.3 3.7 89
HANSEN SAWMILL 8360 1.4 2.2 64 2.0 3.3 61
LITTLE GOOSE 8870 2.1 -M * 5.5 -M *
MIDDLE POWDER 7760 4.0 3.8 105 2.7 5.1 53
POWDER RIVER PASS 9480 4.0 3.6 111 4.8 4.3 112
SOLDIER PARK 8720 1.0 -M * 2.6 -M *
SUCKER CREEK 8880 3.4 3.4 100 3.8 4.7 81
TIE CREEK 6870 1.5 1.2 125 3.0 3.8 79
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Basin wide percent of average 88 82
BELLE FOURCHE
BLIND PARK 6890 1.4 2.1 67 6.7 4.6 146
COLE CANYON 5910 2.2 2.2 100 4.2 3.1 135
NORTH RAPID CREEK 6130 2.0 1.8 111 5.7 3.9 146
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Basin wide percent of average 92 143
UPPER N. PLATTE RIVER
COLUMBINE 9160 8.8 5.4 163 12.2 6.9 177
DIVIDE PEAK 8880 5.5 5.4 102 9.0 6.6 136
ELK RIVER 8700 5.1 3.4 150 8.6 5.6 154
JOE WRIGHT 10120 9.6 6.6 145 14.3 8.2 174
NORTH FRENCH CREEK 10130 13.0 8.4 155 13.8 7.9 175
OLD BATTLE 10000 11.7 9.7 121 13.8 10.0 138
SAGE CREEK BASIN 7850 3.1 3.1 100 6.2 3.8 163
SOUTH BRUSH CREEK 8440 5.4 3.1 174 8.6 5.5 156
TOWER 10500 16.5 13.5 122 19.0 11.3 168
WEBBER SPRINGS 9250 7.8 7.1 110 11.9 8.3 143
WILLOW CREEK PASS 9540 6.1 3.8 161 7.2 4.6 157
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Basin wide percent of average 133 158
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 8.5 6.4 133 10.1 6.6 153
CASPER MTN. 7900 3.1 4.9 63 5.9 5.5 107
DEADMAN HILL 10220 5.5 5.3 104 9.7 5.5 176
DEER PARK 9700 7.9 4.7 168 8.6 7.5 115
LAPRELE CREEK 8375 2.8 3.4 82 4.3 4.5 96
RENO HILL 8400 4.3 4.5 96 6.2 5.3 117
ROACH 9700 6.3 4.6 137 8.9 5.5 162
SAND LAKE 10050 12.4 9.8 127 12.1 7.6 159
SOUTH PASS 9040 6.2 5.2 119 6.1 6.4 95
WINDY PEAK 7900 2.3 2.4 96 4.6 3.9 118
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Basin wide percent of average 116 131
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.7 2.0 135 5.3 4.6 115
DIVIDE PEAK 8880 5.5 5.4 102 9.0 6.6 136
OLD BATTLE 10000 11.7 9.7 121 13.8 10.0 138
SANDSTONE RS 8150 2.2 2.6 85 7.9 5.8 136
WHISKEY PARK 8950 5.4 6.6 82 11.8 8.4 140
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Basin wide percent of average 105 135
UPPER GREEN RIVER
BIG SANDY OPENING 9080 4.5 4.3 105 5.4 4.5 120
BLIND BULL SUM 8650 8.6 7.7 112 6.0 6.9 87
EAST RIM DIVIDE 7930 3.4 3.5 97 3.9 3.7 105
ELKHART PARK G.S. 9400 3.1 3.8 82 4.0 4.6 87
GROS VENTRE SUMMIT 8750 5.5 4.2 131 5.5 4.5 122
GUNSIGHT PASS 9820 5.6 -M * 6.0 -M *
KENDALL R.S. 7740 2.9 3.5 83 4.9 4.3 114
LOOMIS PARK 8240 5.3 4.8 110 6.2 5.3 117
NEW FORK LAKE 8340 3.3 3.0 110 3.4 4.0 85
POCKET CREEK 9360 3.8 -M * 4.9 -M *
SNIDER BASIN 8060 6.0 4.0 150 7.1 4.8 148
SPRING CREEK DIVIDE 9000 10.0 7.4 135 11.1 7.9 141
TRIPLE PEAK 8500 8.8 6.9 128 11.0 7.0 157
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Basin wide percent of average 116 119
LOWER GREEN RIVER
HAMS FORK 7840 3.8 2.8 136 5.3 3.8 139
HEWINTA 9519 1.5 2.3 65 5.8 5.2 112
HICKERSON PARK 9145 1.2 1.6 75 3.2 3.3 97
HOLE-IN-ROCK 9150 1.5 1.6 94 3.6 3.1 116
INDIAN CREEK 9425 10.0 7.2 139 9.9 7.5 132
KELLEY R.S. 8180 6.3 4.6 137 8.8 6.1 144
STEEL CREEK PARK 10200 3.8 4.2 90 6.9 5.4 128
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Basin wide percent of average 116 126
UPPER BEAR RIVER
BUG LAKE 7950 6.8 4.4 155 9.7 6.1 159
HAYDEN FORK 9212 4.4 3.3 133 10.5 6.5 162
KELLEY R.S. 8180 6.3 4.6 137 8.8 6.1 144
LILY LAKE 9156 4.5 3.1 145 8.1 6.0 135
MONTE CRISTO 8960 9.5 5.7 167 12.3 7.8 158
SALT RIVER SUMMIT 7760 4.6 2.9 159 7.9 5.3 149
TRIAL LAKE 9992 9.7 6.1 159 11.8 7.2 164
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Basin wide percent of average 152 154
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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.