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 WEDNESDAY: MAY 11 , 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 22.9 8.3 276 33.7 25.2 134
COTTONWOOD CREEK 7670 37.0 15.8 234 46.9 33.4 140
GRAND TARGHEE 9260 66.5 -M * -M -M *
GRANITE CREEK 6770 23.7 9.4 252 32.7 23.2 141
GRASSY LAKE 7265 46.4 28.8 161 54.8 42.3 130
GROS VENTRE SUMMIT 8750 20.8 11.0 189 22.1 16.1 137
GUNSIGHT PASS 9820 -M -M * 25.1 -M *
LEWIS LAKE DIVIDE 7850 56.6 30.9 183 48.9 43.0 114
PHILLIPS BENCH 8200 43.8 26.0 168 45.3 34.3 132
SALT RIVER SUMMIT 7760 19.1 6.7 285 27.7 22.5 123
SNAKE RIVER STATION 6920 -M 7.7 * 35.4 26.5 134
SPRING CREEK DIVIDE 9000 44.7 26.2 171 41.7 31.2 134
THUMB DIVIDE 7980 28.2 11.3 250 28.6 23.0 124
TOGWOTEE PASS 9580 41.7 27.9 149 -M 30.3 *
TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 *
WILLOW CREEK 8380 48.2 27.2 177 55.0 39.5 139
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Basin wide percent of average 189 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 34.4 25.9 133 33.4 24.7 135
BLACK BEAR 8170 57.0 37.8 151 58.1 47.4 123
CANYON 7870 20.4 8.3 246 24.7 18.6 133
FISHER CREEK 9100 53.6 37.5 143 52.2 43.5 120
MADISON PLATEAU 7750 37.5 21.2 177 41.2 31.6 130
NORTHEAST ENTRANCE 7350 13.0 4.7 277 21.1 15.7 134
PARKER PEAK 9400 40.3 24.3 166 34.8 20.7 168
SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148
THUMB DIVIDE 7980 28.2 11.3 250 28.6 23.0 124
TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 *
WHISKEY CREEK 6800 -M 11.7 * 30.9 25.2 123
WHITE MILL 8700 37.9 25.7 147 37.9 32.6 116
WOLVERINE 7650 14.6 4.5 324 19.8 16.3 121
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Basin wide percent of average 166 130
WIND RIVER
BURROUGHS CREEK 8750 23.2 11.2 207 25.6 20.4 125
CASTLE CREEK 8400 3.5 -M * 12.0 -M *
COLD SPRINGS 9630 9.1 4.1 222 14.3 15.1 95
DEER PARK 9700 21.5 16.8 128 26.8 28.3 95
HOBBS PARK 10100 18.9 17.4 109 18.3 18.4 99
LITTLE WARM 9370 17.8 8.7 205 20.2 18.0 112
SOUTH PASS 9040 16.9 15.5 109 17.5 24.1 73
ST. LAWRENCE ALT 8620 2.2 4.7 47 13.0 13.3 98
TOGWOTEE PASS 9580 41.7 27.9 149 -M 30.3 *
TOWNSEND CREEK 8700 6.0 6.8 88 14.2 16.8 85
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Basin wide percent of average 139 97
BIGHORN BASIN
BALD MTN. 9380 33.7 23.5 143 27.5 22.8 121
BEAR TRAP MEADOW 8200 9.9 1.3 762 14.2 12.0 118
BLACKWATER 9780 39.7 28.7 138 37.3 26.1 143
BONE SPRINGS DIV 9350 29.0 17.1 170 24.2 19.7 123
EVENING STAR 9200 43.1 33.0 131 46.7 31.4 149
GRAVE SPRINGS 8550 11.2 9.4 119 13.6 14.3 95
KIRWIN 9550 17.7 12.0 148 19.7 15.4 128
MARQUETTE 8760 9.8 -M * 13.2 15.2 87
MIDDLE POWDER 7760 14.9 12.1 123 15.0 17.0 88
OWL CREEK 8975 4.6 3.0 153 10.0 9.2 109
POWDER RIVER PASS 9480 21.0 9.0 233 25.7 17.1 150
SHELL CREEK 9580 25.3 16.8 151 23.7 18.2 130
SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148
SYLVAN ROAD 7120 12.4 4.1 302 29.0 21.5 135
TIMBER CREEK 7950 5.3 3.0 177 11.4 11.9 96
YOUNTS PEAK 8350 25.0 16.6 151 24.0 19.8 121
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Basin wide percent of average 154 126
SHOSHONE RIVER
BLACKWATER 9780 39.7 28.7 138 37.3 26.1 143
EVENING STAR 9200 43.1 33.0 131 46.7 31.4 149
KIRWIN 9550 17.7 12.0 148 19.7 15.4 128
MARQUETTE 8760 9.8 -M * 13.2 15.2 87
SYLVAN LAKE 8420 33.3 21.6 154 38.6 26.0 148
SYLVAN ROAD 7120 12.4 4.1 302 29.0 21.5 135
YOUNTS PEAK 8350 25.0 16.6 151 24.0 19.8 121
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Basin wide percent of average 148 134
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.9 1.3 762 14.2 12.0 118
BIG GOOSE 7990 13.1 9.9 132 16.9 14.3 118
BONE SPRINGS DIV 9350 29.0 17.1 170 24.2 19.7 123
BURGESS JUNCTION 7880 15.9 11.4 139 18.3 16.6 110
CLOUD PEAK RESERVOIR 9860 22.4 15.5 145 22.3 18.8 119
DOME LAKE 8880 19.4 11.4 170 20.6 18.2 113
GRAVE SPRINGS 8550 11.2 9.4 119 13.6 14.3 95
HANSEN SAWMILL 8360 9.7 3.2 303 13.8 12.0 115
LITTLE GOOSE 8870 15.7 -M * 21.5 -M *
MIDDLE POWDER 7760 14.9 12.1 123 15.0 17.0 88
POWDER RIVER PASS 9480 21.0 9.0 233 25.7 17.1 150
SOLDIER PARK 8720 11.3 -M * 14.5 -M *
SUCKER CREEK 8880 19.6 11.2 175 22.8 19.0 120
TIE CREEK 6870 7.2 2.4 300 15.8 14.9 106
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Basin wide percent of average 170 115
BELLE FOURCHE
BLIND PARK 6890 5.1 1.3 392 22.3 15.5 144
COLE CANYON 5910 4.2 1.4 300 17.2 10.8 159
NORTH RAPID CREEK 6130 .0 1.1 0 17.3 12.4 140
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Basin wide percent of average 245 147
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.1 13.0 247 42.6 24.9 171
COLUMBINE 9160 35.7 15.7 227 44.7 30.3 148
DIVIDE PEAK 8880 29.3 15.0 195 37.6 25.4 148
ELK RIVER 8700 26.0 9.8 265 34.6 24.1 144
JOE WRIGHT 10120 48.2 24.6 196 48.6 31.8 153
NORTH FRENCH CREEK 10130 62.4 34.0 184 -M 31.4 *
OLD BATTLE 10000 56.8 36.6 155 61.4 41.6 148
SAGE CREEK BASIN 7850 10.4 8.7 120 24.2 14.8 164
SOUTH BRUSH CREEK 8440 20.1 7.9 254 31.0 21.4 145
TOWER 10500 73.4 52.2 141 -M 47.1 *
WEBBER SPRINGS 9250 37.4 20.6 182 46.9 32.5 144
WILLOW CREEK PASS 9540 25.3 12.6 201 25.2 16.7 151
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Basin wide percent of average 182 151
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.4 25.3 160 41.7 28.6 146
CASPER MTN. 7900 10.6 13.7 77 19.3 21.2 91
DEADMAN HILL 10220 30.2 18.9 160 31.1 22.4 139
DEER PARK 9700 21.5 16.8 128 26.8 28.3 95
LAPRELE CREEK 8375 11.2 4.6 243 18.8 17.8 106
RENO HILL 8400 16.6 11.4 146 23.3 21.9 106
ROACH 9700 26.0 15.3 170 31.8 23.9 133
SAND LAKE 10050 49.8 36.4 137 47.9 31.2 154
SOUTH PASS 9040 16.9 15.5 109 17.5 24.1 73
WINDY PEAK 7900 5.5 2.5 220 17.2 14.7 117
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Basin wide percent of average 143 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 1.7 * 22.3 19.5 114
DIVIDE PEAK 8880 29.3 15.0 195 37.6 25.4 148
OLD BATTLE 10000 56.8 36.6 155 61.4 41.6 148
SANDSTONE RS 8150 19.2 5.3 362 34.1 23.0 148
WHISKEY PARK 8950 -M 28.3 * 54.4 35.5 153
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Basin wide percent of average 185 145
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.9 10.5 170 20.6 16.9 122
BLIND BULL SUM 8650 45.6 26.0 175 31.1 26.2 119
EAST RIM DIVIDE 7930 13.8 10.6 130 18.4 14.6 126
ELKHART PARK G.S. 9400 17.9 10.6 169 18.6 17.0 109
GROS VENTRE SUMMIT 8750 20.8 11.0 189 22.1 16.1 137
GUNSIGHT PASS 9820 -M -M * 25.1 -M *
KENDALL R.S. 7740 13.2 5.7 232 21.9 17.2 127
LOOMIS PARK 8240 23.8 11.2 213 28.8 20.8 138
NEW FORK LAKE 8340 13.3 5.3 251 15.4 14.2 108
POCKET CREEK 9360 16.6 -M * 19.3 -M *
SNIDER BASIN 8060 20.8 9.3 224 24.5 19.2 128
SPRING CREEK DIVIDE 9000 44.7 26.2 171 41.7 31.2 134
TRIPLE PEAK 8500 41.3 19.4 213 44.7 29.9 149
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Basin wide percent of average 187 129
LOWER GREEN RIVER
HAMS FORK 7840 11.7 2.6 450 19.4 15.6 124
HEWINTA 9519 15.3 5.9 259 24.6 18.7 132
HICKERSON PARK 9145 1.4 3.1 45 14.4 11.0 131
HOLE-IN-ROCK 9150 6.4 2.5 256 16.2 10.6 153
INDIAN CREEK 9425 39.1 25.4 154 34.4 30.6 112
KELLEY R.S. 8180 23.1 10.7 216 30.5 24.5 124
STEEL CREEK PARK 10200 26.3 18.7 141 28.8 21.3 135
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Basin wide percent of average 179 127
UPPER BEAR RIVER
BUG LAKE 7950 34.7 13.1 265 36.9 23.4 158
HAYDEN FORK 9212 26.3 9.1 289 39.2 26.3 149
KELLEY R.S. 8180 23.1 10.7 216 30.5 24.5 124
LILY LAKE 9156 25.6 7.7 332 30.3 22.2 136
MONTE CRISTO 8960 48.2 24.6 196 47.5 31.7 150
SALT RIVER SUMMIT 7760 19.1 6.7 285 27.7 22.5 123
TRIAL LAKE 9992 50.0 24.6 203 44.0 30.8 143
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Basin wide percent of average 235 141
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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.