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 TUESDAY: APRIL 19 , 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 15.9 159 29.5 23.3 127
COTTONWOOD CREEK 7670 36.0 23.1 156 42.7 30.3 141
GRAND TARGHEE 9260 58.2 -M * 44.0 -M *
GRANITE CREEK 6770 25.8 16.1 160 29.0 21.4 136
GRASSY LAKE 7265 47.0 36.6 128 48.9 39.1 125
GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.3 14.3 128
GUNSIGHT PASS 9820 22.7 -M * -M -M *
LEWIS LAKE DIVIDE 7850 52.0 36.5 142 -M 40.0 *
PHILLIPS BENCH 8200 38.4 30.7 125 39.4 31.6 125
SALT RIVER SUMMIT 7760 20.1 13.8 146 25.7 20.6 125
SNAKE RIVER STATION 6920 -M 16.5 * 31.4 24.4 129
SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 28.9 132
THUMB DIVIDE 7980 27.8 18.0 154 25.3 20.8 122
TOGWOTEE PASS 9580 36.1 27.1 133 37.4 27.3 137
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 *
WILLOW CREEK 8380 46.1 31.9 145 49.4 35.6 139
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Basin wide percent of average 142 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 31.5 25.6 123 30.2 22.2 136
BLACK BEAR 8170 53.5 40.9 131 51.9 44.0 118
CANYON 7870 20.4 13.3 153 21.9 16.9 130
FISHER CREEK 9100 -M 37.3 * -M 39.8 *
MADISON PLATEAU 7750 34.9 25.9 135 37.0 29.3 126
NORTHEAST ENTRANCE 7350 16.4 9.9 166 18.6 13.9 134
PARKER PEAK 9400 35.6 23.7 150 30.2 18.2 166
SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148
THUMB DIVIDE 7980 27.8 18.0 154 25.3 20.8 122
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 *
WHISKEY CREEK 6800 23.1 17.5 132 26.9 23.0 117
WHITE MILL 8700 34.3 26.2 131 34.0 29.6 115
WOLVERINE 7650 17.5 10.2 172 17.5 14.2 123
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Basin wide percent of average 138 128
WIND RIVER
BURROUGHS CREEK 8750 20.4 14.9 137 21.3 18.1 118
CASTLE CREEK 8400 8.0 -M * 10.4 -M *
COLD SPRINGS 9630 10.1 6.1 166 11.2 12.5 90
DEER PARK 9700 21.5 17.8 121 25.0 24.8 101
HOBBS PARK 10100 18.5 17.0 109 16.4 15.2 108
LITTLE WARM 9370 15.1 12.2 124 15.6 15.3 102
SOUTH PASS 9040 19.0 17.8 107 16.5 20.9 79
ST. LAWRENCE ALT 8620 5.5 6.8 81 9.7 10.7 91
TOGWOTEE PASS 9580 36.1 27.1 133 37.4 27.3 137
TOWNSEND CREEK 8700 10.0 9.6 104 13.0 13.9 94
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Basin wide percent of average 121 105
BIGHORN BASIN
BALD MTN. 9380 29.0 22.3 130 23.7 19.6 121
BEAR TRAP MEADOW 8200 10.7 4.0 268 11.0 9.8 112
BLACKWATER 9780 34.9 27.2 128 32.8 23.1 142
BONE SPRINGS DIV 9350 25.1 17.7 142 20.4 16.8 121
EVENING STAR 9200 39.5 32.4 122 41.3 28.2 146
GRAVE SPRINGS 8550 10.8 10.8 100 11.1 11.8 94
KIRWIN 9550 16.3 12.5 130 17.1 12.9 133
MARQUETTE 8760 6.6 -M * 9.4 12.0 78
MIDDLE POWDER 7760 12.0 14.2 85 12.5 14.3 87
OWL CREEK 8975 7.9 5.0 158 8.6 7.2 119
POWDER RIVER PASS 9480 18.7 11.7 160 21.7 14.3 152
SHELL CREEK 9580 21.5 16.3 132 19.3 15.3 126
SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148
SYLVAN ROAD 7120 18.2 11.3 161 25.6 19.4 132
TIMBER CREEK 7950 6.3 5.5 115 7.8 9.0 87
YOUNTS PEAK 8350 22.6 18.2 124 20.0 17.8 112
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Basin wide percent of average 130 124
SHOSHONE RIVER
BLACKWATER 9780 34.9 27.2 128 32.8 23.1 142
EVENING STAR 9200 39.5 32.4 122 41.3 28.2 146
KIRWIN 9550 16.3 12.5 130 17.1 12.9 133
MARQUETTE 8760 6.6 -M * 9.4 12.0 78
SYLVAN LAKE 8420 30.6 24.1 127 34.4 23.2 148
SYLVAN ROAD 7120 18.2 11.3 161 25.6 19.4 132
YOUNTS PEAK 8350 22.6 18.2 124 20.0 17.8 112
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Basin wide percent of average 129 132
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.7 4.0 268 11.0 9.8 112
BIG GOOSE 7990 11.0 12.5 88 12.8 11.2 114
BONE SPRINGS DIV 9350 25.1 17.7 142 20.4 16.8 121
BURGESS JUNCTION 7880 13.7 13.3 103 14.5 14.0 104
CLOUD PEAK RESERVOIR 9860 19.7 15.6 126 18.5 15.2 122
DOME LAKE 8880 16.9 13.8 122 16.3 15.3 107
GRAVE SPRINGS 8550 10.8 10.8 100 11.1 11.8 94
HANSEN SAWMILL 8360 9.7 5.7 170 10.9 9.7 112
LITTLE GOOSE 8870 12.7 -M * 17.0 -M *
MIDDLE POWDER 7760 12.0 14.2 85 12.5 14.3 87
POWDER RIVER PASS 9480 18.7 11.7 160 21.7 14.3 152
SOLDIER PARK 8720 10.7 -M * 11.7 -M *
SUCKER CREEK 8880 16.1 13.4 120 17.8 15.7 113
TIE CREEK 6870 8.0 5.3 151 12.8 11.9 108
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Basin wide percent of average 125 113
BELLE FOURCHE
BLIND PARK 6890 9.9 7.0 141 18.7 12.8 146
COLE CANYON 5910 7.8 6.9 113 14.3 8.0 179
NORTH RAPID CREEK 6130 6.8 8.3 82 15.7 9.9 159
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Basin wide percent of average 110 159
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.3 17.5 173 36.9 22.0 168
COLUMBINE 9160 38.5 24.1 160 40.2 27.7 145
DIVIDE PEAK 8880 30.7 20.9 147 34.2 22.9 149
ELK RIVER 8700 28.2 19.0 148 31.1 21.7 143
JOE WRIGHT 10120 40.8 24.1 169 41.9 27.9 150
NORTH FRENCH CREEK 10130 58.0 33.3 174 -M 27.6 *
OLD BATTLE 10000 52.3 35.3 148 47.0 37.8 124
SAGE CREEK BASIN 7850 21.1 12.1 174 22.9 13.3 172
SOUTH BRUSH CREEK 8440 23.3 13.0 179 -M 18.6 *
TOWER 10500 65.3 50.4 130 47.6 42.6 112
WEBBER SPRINGS 9250 37.2 26.0 143 42.7 29.5 145
WILLOW CREEK PASS 9540 24.0 14.0 171 21.4 14.5 148
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Basin wide percent of average 155 141
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 39.1 27.2 144 33.6 25.0 134
CASPER MTN. 7900 12.2 17.2 71 16.6 17.4 95
DEADMAN HILL 10220 26.7 18.8 142 26.7 19.3 138
DEER PARK 9700 21.5 17.8 121 25.0 24.8 101
LAPRELE CREEK 8375 14.0 9.6 146 16.6 14.8 112
RENO HILL 8400 17.0 16.0 106 20.3 18.0 113
ROACH 9700 25.0 18.5 135 27.8 20.9 133
SAND LAKE 10050 46.0 35.6 129 -M 27.2 *
SOUTH PASS 9040 19.0 17.8 107 16.5 20.9 79
WINDY PEAK 7900 11.4 7.4 154 15.8 12.2 130
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Basin wide percent of average 125 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 7.7 * 19.4 17.5 111
DIVIDE PEAK 8880 30.7 20.9 147 34.2 22.9 149
OLD BATTLE 10000 52.3 35.3 148 47.0 37.8 124
SANDSTONE RS 8150 21.9 12.8 171 -M 20.5 *
WHISKEY PARK 8950 -M 30.6 * -M 31.7 *
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Basin wide percent of average 152 129
UPPER GREEN RIVER
BIG SANDY OPENING 9080 18.5 15.2 122 18.7 14.8 126
BLIND BULL SUM 8650 41.9 28.8 145 28.1 24.2 116
EAST RIM DIVIDE 7930 17.5 14.0 125 16.4 13.1 125
ELKHART PARK G.S. 9400 17.1 14.0 122 16.9 14.9 113
GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.3 14.3 128
GUNSIGHT PASS 9820 22.7 -M * -M -M *
KENDALL R.S. 7740 15.0 13.0 115 18.8 15.8 119
LOOMIS PARK 8240 24.3 16.6 146 25.5 19.0 134
NEW FORK LAKE 8340 14.8 10.9 136 13.7 12.5 110
POCKET CREEK 9360 16.3 -M * 17.8 -M *
SNIDER BASIN 8060 23.3 14.7 159 22.5 17.7 127
SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 28.9 132
TRIPLE PEAK 8500 40.7 25.8 158 40.8 27.2 150
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Basin wide percent of average 139 127
LOWER GREEN RIVER
HAMS FORK 7840 16.3 9.1 179 17.8 13.7 130
HEWINTA 9519 15.0 11.9 126 20.7 16.6 125
HICKERSON PARK 9145 6.5 7.9 82 12.2 9.3 131
HOLE-IN-ROCK 9150 8.4 6.9 122 13.5 8.8 153
INDIAN CREEK 9425 37.9 29.6 128 31.9 28.1 114
KELLEY R.S. 8180 25.0 16.7 150 28.1 22.4 125
STEEL CREEK PARK 10200 21.7 17.6 123 23.5 18.8 125
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Basin wide percent of average 131 125
UPPER BEAR RIVER
BUG LAKE 7950 -M 21.2 * -M 21.2 *
HAYDEN FORK 9212 26.7 16.0 167 34.6 23.6 147
KELLEY R.S. 8180 25.0 16.7 150 28.1 22.4 125
LILY LAKE 9156 25.2 14.0 180 26.3 19.8 133
MONTE CRISTO 8960 46.9 30.3 155 43.7 28.4 154
SALT RIVER SUMMIT 7760 20.1 13.8 146 25.7 20.6 125
TRIAL LAKE 9992 43.3 26.5 163 38.9 27.7 140
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Basin wide percent of average 160 138
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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.