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 THURSDAY: APRIL 21 , 2011
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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 25.3 15.4 164 29.6 23.5 126
COTTONWOOD CREEK 7670 35.9 22.7 158 42.8 30.5 140
GRAND TARGHEE 9260 58.1 -M * 44.0 -M *
GRANITE CREEK 6770 25.9 15.7 165 29.0 21.6 134
GRASSY LAKE 7265 47.2 36.3 130 49.2 39.4 125
GROS VENTRE SUMMIT 8750 18.1 14.4 126 18.4 14.5 127
GUNSIGHT PASS 9820 22.8 -M * 21.2 -M *
LEWIS LAKE DIVIDE 7850 52.4 36.4 144 43.7 40.3 108
PHILLIPS BENCH 8200 38.4 30.6 125 39.6 31.9 124
SALT RIVER SUMMIT 7760 20.3 13.4 151 25.9 20.8 125
SNAKE RIVER STATION 6920 -M 15.9 * 31.7 24.6 129
SPRING CREEK DIVIDE 9000 42.7 28.9 148 38.3 29.1 132
THUMB DIVIDE 7980 28.0 17.6 159 25.5 21.0 121
TOGWOTEE PASS 9580 36.3 27.3 133 37.6 27.6 136
TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 *
WILLOW CREEK 8380 46.2 31.9 145 49.5 35.9 138
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Basin wide percent of average 143 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 31.8 25.7 124 30.4 22.4 136
BLACK BEAR 8170 53.8 40.9 132 52.1 44.3 118
CANYON 7870 20.4 13.0 157 22.0 17.0 129
FISHER CREEK 9100 49.1 37.6 131 46.3 40.2 115
MADISON PLATEAU 7750 35.0 25.8 136 37.2 29.5 126
NORTHEAST ENTRANCE 7350 16.5 9.5 174 18.7 14.1 133
PARKER PEAK 9400 36.0 23.9 151 30.6 18.4 166
SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147
THUMB DIVIDE 7980 28.0 17.6 159 25.5 21.0 121
TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 *
WHISKEY CREEK 6800 22.9 17.3 132 27.1 23.2 117
WHITE MILL 8700 34.4 26.3 131 34.3 29.9 115
WOLVERINE 7650 17.6 9.8 180 17.8 14.4 124
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Basin wide percent of average 139 126
WIND RIVER
BURROUGHS CREEK 8750 20.5 14.8 139 21.3 18.3 116
CASTLE CREEK 8400 8.1 -M * 10.4 -M *
COLD SPRINGS 9630 9.8 5.8 169 11.4 12.7 90
DEER PARK 9700 21.5 17.9 120 25.1 25.2 100
HOBBS PARK 10100 18.3 17.1 107 16.5 15.5 106
LITTLE WARM 9370 15.0 12.1 124 15.7 15.6 101
SOUTH PASS 9040 18.9 17.9 106 16.6 21.2 78
ST. LAWRENCE ALT 8620 5.4 6.6 82 9.7 10.9 89
TOGWOTEE PASS 9580 36.3 27.3 133 37.6 27.6 136
TOWNSEND CREEK 8700 9.6 9.6 100 13.0 14.2 92
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Basin wide percent of average 120 104
BIGHORN BASIN
BALD MTN. 9380 29.1 22.6 129 23.8 19.9 120
BEAR TRAP MEADOW 8200 10.9 3.7 295 11.4 10.0 114
BLACKWATER 9780 35.3 27.4 129 33.1 23.4 141
BONE SPRINGS DIV 9350 25.6 17.8 144 20.9 17.0 123
EVENING STAR 9200 40.1 32.4 124 41.9 28.5 147
GRAVE SPRINGS 8550 10.8 11.0 98 11.2 12.0 93
KIRWIN 9550 16.4 12.5 131 17.2 13.1 131
MARQUETTE 8760 7.0 -M * 9.8 12.2 80
MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.5 90
OWL CREEK 8975 8.1 4.7 172 8.7 7.3 119
POWDER RIVER PASS 9480 19.3 11.7 165 22.2 14.5 153
SHELL CREEK 9580 22.0 16.3 135 19.8 15.5 128
SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147
SYLVAN ROAD 7120 18.2 10.7 170 25.7 19.5 132
TIMBER CREEK 7950 6.6 5.2 127 7.8 9.2 85
YOUNTS PEAK 8350 22.8 18.2 125 20.2 18.0 112
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Basin wide percent of average 133 124
SHOSHONE RIVER
BLACKWATER 9780 35.3 27.4 129 33.1 23.4 141
EVENING STAR 9200 40.1 32.4 124 41.9 28.5 147
KIRWIN 9550 16.4 12.5 131 17.2 13.1 131
MARQUETTE 8760 7.0 -M * 9.8 12.2 80
SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147
SYLVAN ROAD 7120 18.2 10.7 170 25.7 19.5 132
YOUNTS PEAK 8350 22.8 18.2 125 20.2 18.0 112
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Basin wide percent of average 131 132
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.9 3.7 295 11.4 10.0 114
BIG GOOSE 7990 11.6 12.5 93 13.5 11.5 117
BONE SPRINGS DIV 9350 25.6 17.8 144 20.9 17.0 123
BURGESS JUNCTION 7880 13.8 13.3 104 14.7 14.2 104
CLOUD PEAK RESERVOIR 9860 20.2 15.8 128 18.9 15.5 122
DOME LAKE 8880 17.3 13.8 125 16.8 15.5 108
GRAVE SPRINGS 8550 10.8 11.0 98 11.2 12.0 93
HANSEN SAWMILL 8360 9.9 5.6 177 11.1 9.9 112
LITTLE GOOSE 8870 13.6 -M * 17.8 -M *
MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.5 90
POWDER RIVER PASS 9480 19.3 11.7 165 22.2 14.5 153
SOLDIER PARK 8720 10.8 -M * 11.8 -M *
SUCKER CREEK 8880 16.4 13.5 121 18.1 16.0 113
TIE CREEK 6870 8.1 5.2 156 12.8 12.2 105
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Basin wide percent of average 128 113
BELLE FOURCHE
BLIND PARK 6890 9.9 6.8 146 18.8 13.0 145
COLE CANYON 5910 7.9 6.7 118 14.6 8.2 178
NORTH RAPID CREEK 6130 6.6 7.8 85 15.8 10.1 156
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Basin wide percent of average 115 157
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.8 17.4 177 36.9 22.3 165
COLUMBINE 9160 38.7 23.8 163 40.9 28.0 146
DIVIDE PEAK 8880 30.1 20.8 145 34.7 23.1 150
ELK RIVER 8700 28.5 18.5 154 31.9 21.9 146
JOE WRIGHT 10120 41.9 24.4 172 43.2 28.3 153
NORTH FRENCH CREEK 10130 58.7 33.6 175 -M 27.9 *
OLD BATTLE 10000 53.5 35.6 150 47.0 38.1 123
SAGE CREEK BASIN 7850 20.7 12.1 171 23.0 13.4 172
SOUTH BRUSH CREEK 8440 23.5 12.8 184 -M 18.8 *
TOWER 10500 66.7 50.8 131 47.6 43.0 111
WEBBER SPRINGS 9250 37.7 26.0 145 43.3 29.7 146
WILLOW CREEK PASS 9540 24.3 14.1 172 21.8 14.7 148
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Basin wide percent of average 157 141
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 39.6 27.5 144 38.0 25.3 150
CASPER MTN. 7900 12.3 17.4 71 16.8 17.7 95
DEADMAN HILL 10220 27.7 19.0 146 27.3 19.5 140
DEER PARK 9700 21.5 17.9 120 25.1 25.2 100
LAPRELE CREEK 8375 14.4 9.3 155 17.0 15.0 113
RENO HILL 8400 17.6 16.0 110 20.8 18.4 113
ROACH 9700 25.7 18.5 139 28.8 21.1 136
SAND LAKE 10050 46.6 35.9 130 -M 27.5 *
SOUTH PASS 9040 18.9 17.9 106 16.6 21.2 78
WINDY PEAK 7900 11.5 7.1 162 16.0 12.4 129
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Basin wide percent of average 126 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 7.2 * 19.8 17.7 112
DIVIDE PEAK 8880 30.1 20.8 145 34.7 23.1 150
OLD BATTLE 10000 53.5 35.6 150 47.0 38.1 123
SANDSTONE RS 8150 21.4 12.4 173 -M 20.7 *
WHISKEY PARK 8950 -M 30.6 * -M 32.0 *
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Basin wide percent of average 153 129
UPPER GREEN RIVER
BIG SANDY OPENING 9080 18.6 15.0 124 18.8 15.0 125
BLIND BULL SUM 8650 42.3 28.7 147 28.2 24.3 116
EAST RIM DIVIDE 7930 17.7 14.0 126 16.5 13.3 124
ELKHART PARK G.S. 9400 17.2 13.9 124 17.0 15.0 113
GROS VENTRE SUMMIT 8750 18.1 14.4 126 18.4 14.5 127
GUNSIGHT PASS 9820 22.8 -M * 21.2 -M *
KENDALL R.S. 7740 15.0 12.6 119 18.9 15.9 119
LOOMIS PARK 8240 24.5 16.3 150 25.6 19.1 134
NEW FORK LAKE 8340 14.8 10.6 140 13.8 12.6 110
POCKET CREEK 9360 16.5 -M * 17.9 -M *
SNIDER BASIN 8060 23.3 14.5 161 22.6 17.9 126
SPRING CREEK DIVIDE 9000 42.7 28.9 148 38.3 29.1 132
TRIPLE PEAK 8500 40.9 25.7 159 41.0 27.4 150
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Basin wide percent of average 141 127
LOWER GREEN RIVER
HAMS FORK 7840 16.2 8.7 186 18.0 13.9 129
HEWINTA 9519 15.7 11.6 135 21.3 16.8 127
HICKERSON PARK 9145 6.4 7.7 83 12.5 9.4 133
HOLE-IN-ROCK 9150 8.6 6.6 130 13.8 8.9 155
INDIAN CREEK 9425 38.2 29.6 129 32.1 28.3 113
KELLEY R.S. 8180 25.1 16.4 153 28.2 22.6 125
STEEL CREEK PARK 10200 22.4 17.8 126 23.8 19.1 125
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Basin wide percent of average 135 126
UPPER BEAR RIVER
BUG LAKE 7950 -M 20.9 * -M 21.4 *
HAYDEN FORK 9212 27.8 15.6 178 35.3 23.9 148
KELLEY R.S. 8180 25.1 16.4 153 28.2 22.6 125
LILY LAKE 9156 25.6 13.6 188 26.9 20.0 135
MONTE CRISTO 8960 47.0 30.2 156 44.7 28.7 156
SALT RIVER SUMMIT 7760 20.3 13.4 151 25.9 20.8 125
TRIAL LAKE 9992 44.4 26.6 167 39.8 28.0 142
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Basin wide percent of average 164 139
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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.