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 20 , 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 9.4 6.6 142 12.1 8.8 138
COTTONWOOD CREEK 7670 13.5 7.8 173 17.9 11.3 158
GRAND TARGHEE 9260 22.6 -M * 16.7 -M *
GRANITE CREEK 6770 9.4 5.9 159 11.8 8.0 148
GRASSY LAKE 7265 14.3 11.9 120 17.6 14.3 123
GROS VENTRE SUMMIT 8750 7.9 5.8 136 8.0 5.6 143
GUNSIGHT PASS 9820 8.4 -M * 8.8 -M *
LEWIS LAKE DIVIDE 7850 16.3 12.0 136 18.2 14.6 125
PHILLIPS BENCH 8200 14.8 10.3 144 16.0 11.1 144
SALT RIVER SUMMIT 7760 7.5 4.3 174 11.2 7.4 151
SNAKE RIVER STATION 6920 7.5 6.4 117 13.1 9.3 141
SPRING CREEK DIVIDE 9000 15.1 10.5 144 16.0 10.8 148
THUMB DIVIDE 7980 10.2 6.2 165 10.9 7.6 143
TOGWOTEE PASS 9580 14.1 9.8 144 15.1 10.2 148
TWO OCEAN PLATEAU 9240 18.0 11.5 157 14.7 11.6 127
WILLOW CREEK 8380 14.6 11.8 124 19.7 13.2 149
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Basin wide percent of average 143 141
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 11.6 9.7 120 11.4 8.5 134
BLACK BEAR 8170 18.6 14.3 130 19.7 14.8 133
CANYON 7870 7.1 4.9 145 8.5 6.6 129
FISHER CREEK 9100 16.3 13.6 120 16.6 14.3 116
MADISON PLATEAU 7750 12.0 9.2 130 14.0 10.6 132
NORTHEAST ENTRANCE 7350 5.1 4.0 128 7.4 5.5 135
PARKER PEAK 9400 12.9 9.0 143 13.2 7.2 183
SYLVAN LAKE 8420 10.7 9.0 119 13.6 9.7 140
THUMB DIVIDE 7980 10.2 6.2 165 10.9 7.6 143
TWO OCEAN PLATEAU 9240 18.0 11.5 157 14.7 11.6 127
WHISKEY CREEK 6800 7.9 6.0 132 10.1 8.4 120
WHITE MILL 8700 11.8 9.5 124 13.0 11.0 118
WOLVERINE 7650 6.9 4.6 150 7.2 6.1 118
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Basin wide percent of average 134 132
WIND RIVER
BURROUGHS CREEK 8750 7.6 5.6 136 8.0 6.8 118
CASTLE CREEK 8400 3.3 -M * 4.1 -M *
COLD SPRINGS 9630 4.4 4.1 107 4.2 5.2 81
DEER PARK 9700 10.5 5.9 178 11.5 9.5 121
HOBBS PARK 10100 7.6 6.8 112 6.7 5.7 118
LITTLE WARM 9370 6.1 4.5 136 6.1 5.9 103
SOUTH PASS 9040 8.7 7.0 124 7.8 8.1 96
ST. LAWRENCE ALT 8620 2.9 3.4 85 3.6 4.2 86
TOGWOTEE PASS 9580 14.1 9.8 144 15.1 10.2 148
TOWNSEND CREEK 8700 4.3 3.8 113 5.9 5.5 107
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Basin wide percent of average 130 113
BIGHORN BASIN
BALD MTN. 9380 9.6 8.3 116 8.7 7.2 121
BEAR TRAP MEADOW 8200 2.8 2.2 127 3.9 4.1 95
BLACKWATER 9780 13.2 10.5 126 12.3 9.6 128
BONE SPRINGS DIV 9350 7.0 6.8 103 6.7 6.3 106
EVENING STAR 9200 14.4 11.8 122 15.6 11.2 139
GRAVE SPRINGS 8550 3.4 3.4 100 3.8 4.3 88
KIRWIN 9550 6.5 5.3 123 7.0 5.2 135
MARQUETTE 8760 1.6 4.4 36 3.0 4.9 61
MIDDLE POWDER 7760 4.8 4.9 98 3.3 6.1 54
OWL CREEK 8975 2.1 2.4 88 2.5 2.6 96
POWDER RIVER PASS 9480 5.5 4.5 122 6.6 5.3 125
SHELL CREEK 9580 6.6 6.4 103 5.6 5.8 97
SYLVAN LAKE 8420 10.7 9.0 119 13.6 9.7 140
SYLVAN ROAD 7120 7.3 5.2 140 10.1 9.0 112
TIMBER CREEK 7950 1.9 2.8 68 2.3 3.5 66
YOUNTS PEAK 8350 8.6 6.6 130 7.8 7.0 111
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Basin wide percent of average 112 111
SHOSHONE RIVER
BLACKWATER 9780 13.2 10.5 126 12.3 9.6 128
EVENING STAR 9200 14.4 11.8 122 15.6 11.2 139
KIRWIN 9550 6.5 5.3 123 7.0 5.2 135
MARQUETTE 8760 1.6 4.4 36 3.0 4.9 61
SYLVAN LAKE 8420 10.7 9.0 119 13.6 9.7 140
SYLVAN ROAD 7120 7.3 5.2 140 10.1 9.0 112
YOUNTS PEAK 8350 8.6 6.6 130 7.8 7.0 111
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Basin wide percent of average 118 123
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.8 2.2 127 3.9 4.1 95
BIG GOOSE 7990 2.6 3.6 72 4.1 4.1 100
BONE SPRINGS DIV 9350 7.0 6.8 103 6.7 6.3 106
BURGESS JUNCTION 7880 3.3 4.8 69 4.8 5.4 89
CLOUD PEAK RESERVOIR 9860 6.2 5.0 124 7.0 5.8 121
DOME LAKE 8880 3.3 5.3 62 5.5 6.2 89
GRAVE SPRINGS 8550 3.4 3.4 100 3.8 4.3 88
HANSEN SAWMILL 8360 2.5 2.7 93 2.9 3.9 74
LITTLE GOOSE 8870 3.1 -M * 6.9 -M *
MIDDLE POWDER 7760 4.8 4.9 98 3.3 6.1 54
POWDER RIVER PASS 9480 5.5 4.5 122 6.6 5.3 125
SOLDIER PARK 8720 1.9 -M * 3.6 -M *
SUCKER CREEK 8880 4.8 4.4 109 5.5 5.9 93
TIE CREEK 6870 2.0 1.8 111 3.7 4.6 80
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Basin wide percent of average 98 93
BELLE FOURCHE
BLIND PARK 6890 2.4 2.7 89 7.6 5.5 138
COLE CANYON 5910 2.6 2.8 93 4.9 3.6 136
NORTH RAPID CREEK 6130 2.6 2.7 96 6.5 4.7 138
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Basin wide percent of average 93 138
UPPER N. PLATTE RIVER
COLUMBINE 9160 13.1 7.9 166 16.4 9.5 173
DIVIDE PEAK 8880 8.4 7.6 111 11.9 8.6 138
ELK RIVER 8700 7.8 5.5 142 11.1 7.4 150
JOE WRIGHT 10120 12.9 8.3 155 17.6 10.3 171
NORTH FRENCH CREEK 10130 17.9 11.2 160 17.8 10.2 175
OLD BATTLE 10000 17.9 12.6 142 19.4 13.4 145
SAGE CREEK BASIN 7850 5.3 4.4 120 8.4 5.0 168
SOUTH BRUSH CREEK 8440 7.3 4.3 170 10.7 6.7 160
TOWER 10500 23.8 17.5 136 25.5 15.1 169
WEBBER SPRINGS 9250 11.8 9.7 122 16.2 11.0 147
WILLOW CREEK PASS 9540 8.2 4.8 171 8.8 5.7 154
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Basin wide percent of average 143 159
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 12.2 8.9 137 13.6 8.6 158
CASPER MTN. 7900 4.6 6.1 75 7.3 6.5 112
DEADMAN HILL 10220 6.7 6.6 102 11.7 6.9 170
DEER PARK 9700 10.5 5.9 178 11.5 9.5 121
LAPRELE CREEK 8375 4.3 4.5 96 5.7 5.4 106
RENO HILL 8400 5.7 5.7 100 7.6 6.4 119
ROACH 9700 8.7 6.1 143 11.5 7.2 160
SAND LAKE 10050 16.1 12.8 126 15.7 9.9 159
SOUTH PASS 9040 8.7 7.0 124 7.8 8.1 96
WINDY PEAK 7900 3.5 3.1 113 5.9 4.9 120
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Basin wide percent of average 121 134
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 4.1 3.0 137 6.5 6.0 108
DIVIDE PEAK 8880 8.4 7.6 111 11.9 8.6 138
OLD BATTLE 10000 17.9 12.6 142 19.4 13.4 145
SANDSTONE RS 8150 4.2 4.0 105 10.8 7.5 144
WHISKEY PARK 8950 -M 9.0 * 16.7 11.1 150
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Basin wide percent of average 127 140
UPPER GREEN RIVER
BIG SANDY OPENING 9080 7.0 5.9 119 7.7 5.7 135
BLIND BULL SUM 8650 13.1 10.9 120 9.9 9.4 105
EAST RIM DIVIDE 7930 5.8 4.9 118 6.2 4.8 129
ELKHART PARK G.S. 9400 5.7 5.3 108 6.3 5.8 109
GROS VENTRE SUMMIT 8750 7.9 5.8 136 8.0 5.6 143
GUNSIGHT PASS 9820 8.4 -M * 8.8 -M *
KENDALL R.S. 7740 5.9 5.3 111 7.6 5.7 133
LOOMIS PARK 8240 8.6 6.7 128 9.6 7.0 137
NEW FORK LAKE 8340 5.4 4.4 123 5.3 5.1 104
POCKET CREEK 9360 5.7 -M * 6.9 -M *
SNIDER BASIN 8060 8.9 5.7 156 9.8 6.6 148
SPRING CREEK DIVIDE 9000 15.1 10.5 144 16.0 10.8 148
TRIPLE PEAK 8500 13.3 9.8 136 15.4 9.3 166
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Basin wide percent of average 129 134
LOWER GREEN RIVER
HAMS FORK 7840 6.4 4.3 149 7.2 4.9 147
HEWINTA 9519 3.9 3.3 118 7.8 6.3 124
HICKERSON PARK 9145 1.7 2.3 74 3.8 3.9 97
HOLE-IN-ROCK 9150 2.3 2.2 105 4.2 3.5 120
INDIAN CREEK 9425 14.9 10.3 145 14.1 10.1 140
KELLEY R.S. 8180 9.7 6.4 152 12.4 8.3 149
STEEL CREEK PARK 10200 6.1 5.6 109 9.2 6.6 139
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Basin wide percent of average 131 135
UPPER BEAR RIVER
BUG LAKE 7950 12.9 6.5 198 15.4 7.9 195
HAYDEN FORK 9212 8.2 5.0 164 14.5 8.5 171
KELLEY R.S. 8180 9.7 6.4 152 12.4 8.3 149
LILY LAKE 9156 7.8 4.5 173 10.7 7.6 141
MONTE CRISTO 8960 15.5 8.6 180 17.7 10.3 172
SALT RIVER SUMMIT 7760 7.5 4.3 174 11.2 7.4 151
TRIAL LAKE 9992 16.2 8.5 191 17.7 9.4 188
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Basin wide percent of average 178 168
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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.