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: APRIL 23 , 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 26.0 14.9 174 30.5 23.7 129
COTTONWOOD CREEK 7670 35.5 22.2 160 43.2 30.8 140
GRAND TARGHEE 9260 59.7 -M * 44.8 -M *
GRANITE CREEK 6770 26.3 15.2 173 29.5 21.7 136
GRASSY LAKE 7265 48.1 35.8 134 50.0 39.7 126
GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.6 127
GUNSIGHT PASS 9820 23.2 -M * 21.4 -M *
LEWIS LAKE DIVIDE 7850 53.5 36.2 148 43.9 40.5 108
PHILLIPS BENCH 8200 39.2 30.5 129 40.6 32.1 126
SALT RIVER SUMMIT 7760 20.4 13.0 157 26.1 20.9 125
SNAKE RIVER STATION 6920 -M 15.2 * 32.4 24.8 131
SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.4 29.3 131
THUMB DIVIDE 7980 28.5 17.2 166 25.9 21.2 122
TOGWOTEE PASS 9580 37.0 27.4 135 38.4 27.9 138
TWO OCEAN PLATEAU 9240 -M 31.4 * -M 31.0 *
WILLOW CREEK 8380 46.6 31.8 147 50.0 36.2 138
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Basin wide percent of average 147 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 31.8 25.6 124 30.4 22.6 135
BLACK BEAR 8170 55.1 40.6 136 53.2 44.6 119
CANYON 7870 20.9 12.6 166 22.3 17.1 130
FISHER CREEK 9100 49.7 37.6 132 -M 40.5 *
MADISON PLATEAU 7750 35.9 25.5 141 37.8 29.7 127
NORTHEAST ENTRANCE 7350 16.7 9.0 186 19.0 14.2 134
PARKER PEAK 9400 36.5 24.0 152 -M 18.6 *
SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149
THUMB DIVIDE 7980 28.5 17.2 166 25.9 21.2 122
TWO OCEAN PLATEAU 9240 -M 31.4 * -M 31.0 *
WHISKEY CREEK 6800 23.3 16.9 138 27.9 23.4 119
WHITE MILL 8700 34.9 26.2 133 34.6 30.1 115
WOLVERINE 7650 17.5 9.1 192 17.7 14.5 122
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Basin wide percent of average 143 126
WIND RIVER
BURROUGHS CREEK 8750 20.4 14.6 140 21.3 18.5 115
CASTLE CREEK 8400 8.4 -M * 10.2 -M *
COLD SPRINGS 9630 10.0 5.4 185 11.4 13.0 88
DEER PARK 9700 21.8 18.6 117 25.4 25.5 100
HOBBS PARK 10100 18.7 17.3 108 16.4 15.8 104
LITTLE WARM 9370 15.5 11.9 130 16.0 15.8 101
SOUTH PASS 9040 19.6 17.8 110 16.6 21.5 77
ST. LAWRENCE ALT 8620 5.0 6.5 77 9.6 11.1 86
TOGWOTEE PASS 9580 37.0 27.4 135 38.4 27.9 138
TOWNSEND CREEK 8700 9.7 9.5 102 13.1 14.4 91
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Basin wide percent of average 122 103
BIGHORN BASIN
BALD MTN. 9380 29.8 22.7 131 24.1 20.2 119
BEAR TRAP MEADOW 8200 11.2 3.4 329 11.6 10.1 115
BLACKWATER 9780 35.9 27.5 131 33.9 23.7 143
BONE SPRINGS DIV 9350 26.1 17.7 147 21.2 17.2 123
EVENING STAR 9200 40.5 32.4 125 -M 28.8 *
GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.3 93
KIRWIN 9550 16.5 12.7 130 17.0 13.3 128
MARQUETTE 8760 6.6 -M * 9.7 12.5 78
MIDDLE POWDER 7760 12.7 14.3 89 12.9 14.8 87
OWL CREEK 8975 8.1 4.3 188 8.6 7.5 115
POWDER RIVER PASS 9480 19.7 11.5 171 22.6 14.8 153
SHELL CREEK 9580 22.6 16.4 138 20.5 15.8 130
SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149
SYLVAN ROAD 7120 18.5 10.0 185 26.2 19.7 133
TIMBER CREEK 7950 6.6 5.1 129 7.9 9.4 84
YOUNTS PEAK 8350 23.1 18.2 127 20.4 18.1 113
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Basin wide percent of average 136 122
SHOSHONE RIVER
BLACKWATER 9780 35.9 27.5 131 33.9 23.7 143
EVENING STAR 9200 40.5 32.4 125 -M 28.8 *
KIRWIN 9550 16.5 12.7 130 17.0 13.3 128
MARQUETTE 8760 6.6 -M * 9.7 12.5 78
SYLVAN LAKE 8420 31.7 24.0 132 35.3 23.7 149
SYLVAN ROAD 7120 18.5 10.0 185 26.2 19.7 133
YOUNTS PEAK 8350 23.1 18.2 127 20.4 18.1 113
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Basin wide percent of average 133 128
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.2 3.4 329 11.6 10.1 115
BIG GOOSE 7990 11.6 12.4 94 13.5 11.8 114
BONE SPRINGS DIV 9350 26.1 17.7 147 21.2 17.2 123
BURGESS JUNCTION 7880 14.2 13.2 108 14.9 14.5 103
CLOUD PEAK RESERVOIR 9860 20.4 15.9 128 18.8 15.8 119
DOME LAKE 8880 17.5 13.6 129 16.9 15.7 108
GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.3 93
HANSEN SAWMILL 8360 9.7 5.3 183 11.0 10.1 109
LITTLE GOOSE 8870 13.6 -M * 17.8 -M *
MIDDLE POWDER 7760 12.7 14.3 89 12.9 14.8 87
POWDER RIVER PASS 9480 19.7 11.5 171 22.6 14.8 153
SOLDIER PARK 8720 11.0 -M * 11.8 -M *
SUCKER CREEK 8880 16.7 13.4 125 18.4 16.3 113
TIE CREEK 6870 8.2 5.3 155 13.1 12.4 106
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Basin wide percent of average 131 112
BELLE FOURCHE
BLIND PARK 6890 10.6 6.2 171 -M 13.2 *
COLE CANYON 5910 8.8 6.4 138 15.3 8.5 180
NORTH RAPID CREEK 6130 6.7 7.2 93 16.3 10.4 157
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Basin wide percent of average 132 167
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.3 17.2 182 36.8 22.5 164
COLUMBINE 9160 39.2 23.4 168 42.0 28.2 149
DIVIDE PEAK 8880 30.8 20.7 149 35.5 23.3 152
ELK RIVER 8700 29.1 18.0 162 32.6 22.1 148
JOE WRIGHT 10120 43.4 24.6 176 44.4 28.6 155
NORTH FRENCH CREEK 10130 60.0 33.8 178 -M 28.2 *
OLD BATTLE 10000 54.6 35.8 153 47.1 38.5 122
SAGE CREEK BASIN 7850 20.8 12.0 173 23.4 13.5 173
SOUTH BRUSH CREEK 8440 24.3 12.6 193 -M 19.1 *
TOWER 10500 68.5 51.2 134 47.7 43.4 110
WEBBER SPRINGS 9250 38.4 26.0 148 44.3 30.0 148
WILLOW CREEK PASS 9540 25.1 14.2 177 22.7 14.9 152
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Basin wide percent of average 161 142
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.1 27.8 144 38.0 25.7 148
CASPER MTN. 7900 12.3 17.5 70 17.0 18.1 94
DEADMAN HILL 10220 28.8 19.2 150 28.5 19.8 144
DEER PARK 9700 21.8 18.6 117 25.4 25.5 100
LAPRELE CREEK 8375 14.7 8.9 165 17.3 15.3 113
RENO HILL 8400 17.8 15.9 112 20.9 18.7 112
ROACH 9700 26.7 18.5 144 29.8 21.4 139
SAND LAKE 10050 47.5 36.2 131 -M 27.9 *
SOUTH PASS 9040 19.6 17.8 110 16.6 21.5 77
WINDY PEAK 7900 11.6 6.7 173 16.2 12.6 129
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Basin wide percent of average 129 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 6.7 * 20.6 17.9 115
DIVIDE PEAK 8880 30.8 20.7 149 35.5 23.3 152
OLD BATTLE 10000 54.6 35.8 153 47.1 38.5 122
SANDSTONE RS 8150 -M 11.9 * -M 21.0 *
WHISKEY PARK 8950 -M 30.7 * -M 32.4 *
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Basin wide percent of average 151* 129
UPPER GREEN RIVER
BIG SANDY OPENING 9080 18.9 14.8 128 19.0 15.2 125
BLIND BULL SUM 8650 42.6 28.6 149 28.2 24.5 115
EAST RIM DIVIDE 7930 18.1 13.9 130 16.6 13.4 124
ELKHART PARK G.S. 9400 17.4 13.8 126 17.0 15.2 112
GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.6 127
GUNSIGHT PASS 9820 23.2 -M * 21.4 -M *
KENDALL R.S. 7740 15.6 12.2 128 19.4 16.0 121
LOOMIS PARK 8240 25.3 16.0 158 26.1 19.3 135
NEW FORK LAKE 8340 15.3 10.3 149 13.9 12.8 109
POCKET CREEK 9360 16.9 -M * 18.2 -M *
SNIDER BASIN 8060 23.9 14.2 168 22.7 18.0 126
SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.4 29.3 131
TRIPLE PEAK 8500 41.4 25.4 163 41.6 27.7 150
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Basin wide percent of average 146 127
LOWER GREEN RIVER
HAMS FORK 7840 17.2 8.2 210 18.4 14.0 131
HEWINTA 9519 16.1 11.2 144 21.4 17.0 126
HICKERSON PARK 9145 5.9 7.4 80 12.3 9.6 128
HOLE-IN-ROCK 9150 8.8 6.3 140 13.9 9.1 153
INDIAN CREEK 9425 39.0 29.4 133 32.5 28.5 114
KELLEY R.S. 8180 25.5 16.1 158 28.6 22.8 125
STEEL CREEK PARK 10200 22.6 18.0 126 23.9 19.3 124
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Basin wide percent of average 140 126
UPPER BEAR RIVER
BUG LAKE 7950 -M 20.5 * -M 21.6 *
HAYDEN FORK 9212 28.3 15.2 186 35.7 24.1 148
KELLEY R.S. 8180 25.5 16.1 158 28.6 22.8 125
LILY LAKE 9156 25.7 13.2 195 27.2 20.3 134
MONTE CRISTO 8960 47.1 29.9 158 44.9 29.0 155
SALT RIVER SUMMIT 7760 20.4 13.0 157 26.1 20.9 125
TRIAL LAKE 9992 44.8 26.6 168 40.6 28.3 143
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Basin wide percent of average 168 140
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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.