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: APRIL 25 , 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 26.2 14.3 183 30.5 23.8 128
COTTONWOOD CREEK 7670 34.9 21.6 162 43.3 31.1 139
GRAND TARGHEE 9260 59.8 -M * 44.8 -M *
GRANITE CREEK 6770 26.3 14.6 180 29.5 21.9 135
GRASSY LAKE 7265 48.1 35.3 136 50.0 40.0 125
GROS VENTRE SUMMIT 8750 18.5 14.1 131 18.7 14.8 126
GUNSIGHT PASS 9820 23.4 -M * 21.5 -M *
LEWIS LAKE DIVIDE 7850 53.5 35.9 149 44.0 40.8 108
PHILLIPS BENCH 8200 39.2 30.4 129 40.7 32.4 126
SALT RIVER SUMMIT 7760 20.4 12.5 163 26.1 21.1 124
SNAKE RIVER STATION 6920 -M 14.6 * 32.4 25.0 130
SPRING CREEK DIVIDE 9000 43.3 28.9 150 39.1 29.6 132
THUMB DIVIDE 7980 28.5 16.7 171 25.9 21.4 121
TOGWOTEE PASS 9580 37.2 27.6 135 38.4 28.1 137
TWO OCEAN PLATEAU 9240 -M 31.6 * -M 31.2 *
WILLOW CREEK 8380 47.1 31.6 149 50.3 36.6 137
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Basin wide percent of average 149 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 31.8 25.7 124 30.4 22.8 133
BLACK BEAR 8170 55.2 40.6 136 53.3 44.9 119
CANYON 7870 21.0 12.3 171 22.4 17.3 129
FISHER CREEK 9100 49.8 37.7 132 -M 40.9 *
MADISON PLATEAU 7750 36.1 25.3 143 37.8 29.9 126
NORTHEAST ENTRANCE 7350 17.1 8.4 204 19.0 14.4 132
PARKER PEAK 9400 36.7 24.2 152 -M 18.8 *
SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147
THUMB DIVIDE 7980 28.5 16.7 171 25.9 21.4 121
TWO OCEAN PLATEAU 9240 -M 31.6 * -M 31.2 *
WHISKEY CREEK 6800 23.2 16.5 141 27.9 23.6 118
WHITE MILL 8700 35.0 26.3 133 34.7 30.4 114
WOLVERINE 7650 -M 8.5 * 17.7 14.7 120
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Basin wide percent of average 142 125
WIND RIVER
BURROUGHS CREEK 8750 20.6 14.4 143 21.4 18.7 114
CASTLE CREEK 8400 8.2 -M * 10.4 -M *
COLD SPRINGS 9630 9.8 5.1 192 11.6 13.2 88
DEER PARK 9700 21.9 19.5 112 25.5 25.9 98
HOBBS PARK 10100 18.8 17.6 107 16.7 16.0 104
LITTLE WARM 9370 15.5 11.8 131 16.2 16.1 101
SOUTH PASS 9040 19.3 18.1 107 16.8 21.8 77
ST. LAWRENCE ALT 8620 4.7 6.4 73 9.6 11.3 85
TOGWOTEE PASS 9580 37.2 27.6 135 38.4 28.1 137
TOWNSEND CREEK 8700 9.4 9.6 98 13.2 14.7 90
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Basin wide percent of average 121 102
BIGHORN BASIN
BALD MTN. 9380 29.8 22.9 130 24.4 20.5 119
BEAR TRAP MEADOW 8200 11.1 3.0 370 11.7 10.3 114
BLACKWATER 9780 35.9 27.9 129 33.9 23.9 142
BONE SPRINGS DIV 9350 26.4 17.9 147 21.3 17.5 122
EVENING STAR 9200 40.7 32.7 124 -M 29.0 *
GRAVE SPRINGS 8550 10.9 10.9 100 11.4 12.5 91
KIRWIN 9550 16.6 12.7 131 17.2 13.6 126
MARQUETTE 8760 6.7 -M * 9.8 12.8 77
MIDDLE POWDER 7760 12.6 14.2 89 13.0 15.0 87
OWL CREEK 8975 7.7 4.1 188 8.7 7.7 113
POWDER RIVER PASS 9480 19.8 11.2 177 22.7 15.0 151
SHELL CREEK 9580 22.7 16.5 138 20.5 16.0 128
SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147
SYLVAN ROAD 7120 18.1 9.6 189 26.2 19.9 132
TIMBER CREEK 7950 6.5 5.0 130 7.9 9.7 81
YOUNTS PEAK 8350 23.3 18.1 129 20.5 18.3 112
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Basin wide percent of average 136 120
SHOSHONE RIVER
BLACKWATER 9780 35.9 27.9 129 33.9 23.9 142
EVENING STAR 9200 40.7 32.7 124 -M 29.0 *
KIRWIN 9550 16.6 12.7 131 17.2 13.6 126
MARQUETTE 8760 6.7 -M * 9.8 12.8 77
SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147
SYLVAN ROAD 7120 18.1 9.6 189 26.2 19.9 132
YOUNTS PEAK 8350 23.3 18.1 129 20.5 18.3 112
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Basin wide percent of average 133 127
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.1 3.0 370 11.7 10.3 114
BIG GOOSE 7990 11.8 12.3 96 13.7 12.1 113
BONE SPRINGS DIV 9350 26.4 17.9 147 21.3 17.5 122
BURGESS JUNCTION 7880 14.2 13.2 108 15.0 14.7 102
CLOUD PEAK RESERVOIR 9860 20.8 15.9 131 19.2 16.2 119
DOME LAKE 8880 17.7 13.5 131 17.2 16.0 108
GRAVE SPRINGS 8550 10.9 10.9 100 11.4 12.5 91
HANSEN SAWMILL 8360 9.9 5.1 194 11.1 10.3 108
LITTLE GOOSE 8870 13.8 -M * 18.0 -M *
MIDDLE POWDER 7760 12.6 14.2 89 13.0 15.0 87
POWDER RIVER PASS 9480 19.8 11.2 177 22.7 15.0 151
SOLDIER PARK 8720 11.1 -M * 12.0 -M *
SUCKER CREEK 8880 17.0 13.3 128 18.6 16.5 113
TIE CREEK 6870 8.3 5.0 166 13.2 12.7 104
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Basin wide percent of average 133 111
BELLE FOURCHE
BLIND PARK 6890 10.6 5.5 193 -M 13.5 *
COLE CANYON 5910 8.8 6.1 144 15.4 8.7 177
NORTH RAPID CREEK 6130 6.5 6.4 102 16.3 10.6 154
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Basin wide percent of average 144 164
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.4 16.9 186 36.9 22.7 163
COLUMBINE 9160 38.9 22.9 170 42.5 28.4 150
DIVIDE PEAK 8880 30.8 20.5 150 35.6 23.6 151
ELK RIVER 8700 29.3 17.3 169 33.0 22.4 147
JOE WRIGHT 10120 44.8 24.7 181 45.2 29.0 156
NORTH FRENCH CREEK 10130 60.3 34.1 177 -M 28.6 *
OLD BATTLE 10000 55.3 36.1 153 47.2 38.8 122
SAGE CREEK BASIN 7850 20.3 11.9 171 23.4 13.7 171
SOUTH BRUSH CREEK 8440 24.2 12.3 197 -M 19.3 *
TOWER 10500 69.3 51.5 135 47.7 43.9 109
WEBBER SPRINGS 9250 38.8 25.9 150 44.7 30.3 148
WILLOW CREEK PASS 9540 26.1 14.2 184 23.6 15.1 156
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Basin wide percent of average 163 142
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.7 28.1 145 38.0 26.0 146
CASPER MTN. 7900 12.4 17.6 70 16.9 18.5 91
DEADMAN HILL 10220 29.7 19.3 154 29.1 20.1 145
DEER PARK 9700 21.9 19.5 112 25.5 25.9 98
LAPRELE CREEK 8375 14.7 8.5 173 17.4 15.6 112
RENO HILL 8400 17.6 15.7 112 21.0 19.1 110
ROACH 9700 27.5 18.6 148 30.7 21.6 142
SAND LAKE 10050 47.9 36.4 132 -M 28.2 *
SOUTH PASS 9040 19.3 18.1 107 16.8 21.8 77
WINDY PEAK 7900 11.0 6.3 175 16.3 12.8 127
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Basin wide percent of average 129 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 6.2 * 20.9 18.0 116
DIVIDE PEAK 8880 30.8 20.5 150 35.6 23.6 151
OLD BATTLE 10000 55.3 36.1 153 47.2 38.8 122
SANDSTONE RS 8150 -M 11.4 * -M 21.2 *
WHISKEY PARK 8950 -M 30.7 * -M 32.7 *
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Basin wide percent of average 152* 129
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.1 14.6 131 19.1 15.4 124
BLIND BULL SUM 8650 42.6 28.5 149 28.5 24.7 115
EAST RIM DIVIDE 7930 17.7 13.8 128 16.6 13.5 123
ELKHART PARK G.S. 9400 17.4 13.6 128 17.2 15.4 112
GROS VENTRE SUMMIT 8750 18.5 14.1 131 18.7 14.8 126
GUNSIGHT PASS 9820 23.4 -M * 21.5 -M *
KENDALL R.S. 7740 15.2 11.8 129 19.4 16.1 120
LOOMIS PARK 8240 25.2 15.7 161 26.2 19.4 135
NEW FORK LAKE 8340 15.1 9.9 153 14.0 12.9 109
POCKET CREEK 9360 16.9 -M * 18.3 -M *
SNIDER BASIN 8060 24.1 13.9 173 22.8 18.1 126
SPRING CREEK DIVIDE 9000 43.3 28.9 150 39.1 29.6 132
TRIPLE PEAK 8500 41.3 25.1 165 41.6 27.9 149
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Basin wide percent of average 147 127
LOWER GREEN RIVER
HAMS FORK 7840 17.3 7.7 225 18.5 14.2 130
HEWINTA 9519 16.3 10.8 151 21.7 17.2 126
HICKERSON PARK 9145 5.7 7.0 81 12.6 9.7 130
HOLE-IN-ROCK 9150 9.0 5.9 153 14.1 9.3 152
INDIAN CREEK 9425 39.2 29.3 134 32.7 28.8 114
KELLEY R.S. 8180 25.7 15.6 165 28.7 23.0 125
STEEL CREEK PARK 10200 23.0 18.2 126 24.0 19.6 122
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Basin wide percent of average 144 125
UPPER BEAR RIVER
BUG LAKE 7950 -M 20.0 * -M 21.8 *
HAYDEN FORK 9212 28.5 14.8 193 35.9 24.4 147
KELLEY R.S. 8180 25.7 15.6 165 28.7 23.0 125
LILY LAKE 9156 25.9 12.8 202 27.3 20.5 133
MONTE CRISTO 8960 47.8 29.6 161 45.1 29.3 154
SALT RIVER SUMMIT 7760 20.4 12.5 163 26.1 21.1 124
TRIAL LAKE 9992 44.9 26.6 169 40.8 28.6 143
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Basin wide percent of average 173 139
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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.