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 4 , 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 25.2 11.1 227 31.0 24.6 126
COTTONWOOD CREEK 7670 37.2 18.7 199 45.4 32.4 140
GRAND TARGHEE 9260 62.6 -M * 45.9 -M *
GRANITE CREEK 6770 25.2 11.9 212 29.8 22.6 132
GRASSY LAKE 7265 49.7 32.2 154 51.6 41.3 125
GROS VENTRE SUMMIT 8750 18.4 12.7 145 19.3 15.5 125
GUNSIGHT PASS 9820 24.1 -M * 21.9 -M *
LEWIS LAKE DIVIDE 7850 55.2 33.7 164 46.2 42.0 110
PHILLIPS BENCH 8200 40.6 28.6 142 41.9 33.5 125
SALT RIVER SUMMIT 7760 20.9 9.6 218 26.9 21.9 123
SNAKE RIVER STATION 6920 -M 10.9 * 33.1 25.8 128
SPRING CREEK DIVIDE 9000 44.5 28.1 158 40.5 30.5 133
THUMB DIVIDE 7980 28.8 13.9 207 27.0 22.3 121
TOGWOTEE PASS 9580 38.0 28.1 135 39.4 29.4 134
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 *
WILLOW CREEK 8380 48.8 29.8 164 52.8 38.2 138
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Basin wide percent of average 167 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.4 26.0 128 32.1 23.9 134
BLACK BEAR 8170 57.1 39.4 145 55.7 46.3 120
CANYON 7870 21.4 10.4 206 23.6 18.0 131
FISHER CREEK 9100 51.5 37.7 137 48.8 42.4 115
MADISON PLATEAU 7750 37.8 23.4 162 39.7 30.8 129
NORTHEAST ENTRANCE 7350 16.4 6.1 269 19.7 15.1 130
PARKER PEAK 9400 38.3 24.5 156 32.5 19.9 163
SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146
THUMB DIVIDE 7980 28.8 13.9 207 27.0 22.3 121
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 *
WHISKEY CREEK 6800 24.6 14.1 174 29.3 24.5 120
WHITE MILL 8700 36.2 26.2 138 35.8 31.6 113
WOLVERINE 7650 16.8 6.3 267 18.6 15.5 120
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Basin wide percent of average 157 127
WIND RIVER
BURROUGHS CREEK 8750 20.7 12.9 160 21.8 19.6 111
CASTLE CREEK 8400 6.1 -M * 10.6 -M *
COLD SPRINGS 9630 9.2 4.6 200 11.8 14.3 83
DEER PARK 9700 22.4 17.6 127 26.3 27.4 96
HOBBS PARK 10100 19.5 17.9 109 17.4 17.4 100
LITTLE WARM 9370 15.2 10.3 148 16.6 17.2 97
SOUTH PASS 9040 19.7 17.4 113 17.3 23.1 75
ST. LAWRENCE ALT 8620 2.9 5.6 52 9.9 12.5 79
TOGWOTEE PASS 9580 38.0 28.1 135 39.4 29.4 134
TOWNSEND CREEK 8700 9.2 8.3 111 13.8 15.9 87
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Basin wide percent of average 128 99
BIGHORN BASIN
BALD MTN. 9380 32.5 23.4 139 26.3 21.8 121
BEAR TRAP MEADOW 8200 11.5 2.0 575 12.7 11.2 113
BLACKWATER 9780 36.8 29.1 126 34.8 25.1 139
BONE SPRINGS DIV 9350 28.4 18.1 157 22.8 18.7 122
EVENING STAR 9200 41.5 33.2 125 44.5 30.4 146
GRAVE SPRINGS 8550 12.2 10.7 114 12.8 13.5 95
KIRWIN 9550 16.9 12.8 132 17.7 14.6 121
MARQUETTE 8760 7.3 -M * 10.4 14.1 74
MIDDLE POWDER 7760 14.8 13.8 107 14.6 16.2 90
OWL CREEK 8975 7.0 3.6 194 9.1 8.5 107
POWDER RIVER PASS 9480 20.8 10.1 206 24.2 16.2 149
SHELL CREEK 9580 24.6 16.6 148 22.1 17.2 128
SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146
SYLVAN ROAD 7120 16.3 7.3 223 27.0 20.8 130
TIMBER CREEK 7950 6.1 4.6 133 8.2 10.9 75
YOUNTS PEAK 8350 23.6 18.0 131 21.0 19.1 110
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Basin wide percent of average 144 122
SHOSHONE RIVER
BLACKWATER 9780 36.8 29.1 126 34.8 25.1 139
EVENING STAR 9200 41.5 33.2 125 44.5 30.4 146
KIRWIN 9550 16.9 12.8 132 17.7 14.6 121
MARQUETTE 8760 7.3 -M * 10.4 14.1 74
SYLVAN LAKE 8420 33.0 23.2 142 36.7 25.1 146
SYLVAN ROAD 7120 16.3 7.3 223 27.0 20.8 130
YOUNTS PEAK 8350 23.6 18.0 131 21.0 19.1 110
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Basin wide percent of average 136 129
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.5 2.0 575 12.7 11.2 113
BIG GOOSE 7990 13.4 11.1 121 15.5 13.4 116
BONE SPRINGS DIV 9350 28.4 18.1 157 22.8 18.7 122
BURGESS JUNCTION 7880 16.1 12.8 126 17.0 15.8 108
CLOUD PEAK RESERVOIR 9860 22.4 16.1 139 21.0 17.6 119
DOME LAKE 8880 19.6 12.9 152 19.2 17.2 112
GRAVE SPRINGS 8550 12.2 10.7 114 12.8 13.5 95
HANSEN SAWMILL 8360 10.6 4.4 241 12.1 11.3 107
LITTLE GOOSE 8870 15.7 -M * 20.0 -M *
MIDDLE POWDER 7760 14.8 13.8 107 14.6 16.2 90
POWDER RIVER PASS 9480 20.8 10.1 206 24.2 16.2 149
SOLDIER PARK 8720 11.9 -M * 13.1 -M *
SUCKER CREEK 8880 19.2 12.5 154 21.3 17.9 119
TIE CREEK 6870 9.0 3.6 250 14.8 13.9 106
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Basin wide percent of average 155 114
BELLE FOURCHE
BLIND PARK 6890 10.8 3.7 292 21.8 14.6 149
COLE CANYON 5910 9.0 3.6 250 16.6 9.9 168
NORTH RAPID CREEK 6130 5.7 2.7 211 17.3 11.7 148
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Basin wide percent of average 255 154
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.2 15.3 197 37.0 24.0 154
COLUMBINE 9160 40.6 19.6 207 44.5 29.5 151
DIVIDE PEAK 8880 32.4 18.3 177 37.1 24.6 151
ELK RIVER 8700 30.4 13.5 225 34.4 23.4 147
JOE WRIGHT 10120 48.8 25.1 194 48.3 30.6 158
NORTH FRENCH CREEK 10130 63.3 34.5 183 -M 30.2 *
OLD BATTLE 10000 57.8 37.2 155 47.3 40.4 117
SAGE CREEK BASIN 7850 17.6 10.6 166 24.2 14.3 169
SOUTH BRUSH CREEK 8440 25.4 10.2 249 31.0 20.5 151
TOWER 10500 73.0 52.4 139 -M 45.8 *
WEBBER SPRINGS 9250 39.9 24.1 166 46.5 31.6 147
WILLOW CREEK PASS 9540 27.1 13.9 195 25.0 16.0 156
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Basin wide percent of average 177 147
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.6 27.8 153 38.0 27.5 138
CASPER MTN. 7900 13.7 16.4 84 18.6 20.1 93
DEADMAN HILL 10220 31.6 19.7 160 30.8 21.4 144
DEER PARK 9700 22.4 17.6 127 26.3 27.4 96
LAPRELE CREEK 8375 14.4 6.4 225 18.2 16.9 108
RENO HILL 8400 18.7 13.9 135 22.5 20.8 108
ROACH 9700 28.2 17.9 158 31.4 22.9 137
SAND LAKE 10050 50.1 37.0 135 43.7 29.9 146
SOUTH PASS 9040 19.7 17.4 113 17.3 23.1 75
WINDY PEAK 7900 9.2 4.2 219 16.7 13.9 120
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Basin wide percent of average 141 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 3.7 * 22.2 18.9 117
DIVIDE PEAK 8880 32.4 18.3 177 37.1 24.6 151
OLD BATTLE 10000 57.8 37.2 155 47.3 40.4 117
SANDSTONE RS 8150 23.3 8.3 281 34.0 22.2 153
WHISKEY PARK 8950 -M 30.1 * 54.0 34.4 157
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Basin wide percent of average 178 139
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.5 12.7 154 19.7 16.2 122
BLIND BULL SUM 8650 44.1 27.4 161 29.0 25.5 114
EAST RIM DIVIDE 7930 16.7 12.6 133 16.8 14.1 119
ELKHART PARK G.S. 9400 18.0 12.3 146 17.5 16.3 107
GROS VENTRE SUMMIT 8750 18.4 12.7 145 19.3 15.5 125
GUNSIGHT PASS 9820 24.1 -M * 21.9 -M *
KENDALL R.S. 7740 13.9 8.8 158 19.6 16.8 117
LOOMIS PARK 8240 25.2 13.5 187 26.7 20.2 132
NEW FORK LAKE 8340 14.9 7.6 196 14.2 13.6 104
POCKET CREEK 9360 17.3 -M * 18.6 -M *
SNIDER BASIN 8060 24.1 11.8 204 23.2 18.7 124
SPRING CREEK DIVIDE 9000 44.5 28.1 158 40.5 30.5 133
TRIPLE PEAK 8500 42.0 22.7 185 42.9 29.0 148
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Basin wide percent of average 165 124
LOWER GREEN RIVER
HAMS FORK 7840 17.3 5.0 346 19.1 15.0 127
HEWINTA 9519 18.3 8.3 220 23.5 18.1 130
HICKERSON PARK 9145 4.5 4.9 92 13.3 10.5 127
HOLE-IN-ROCK 9150 9.5 4.1 232 14.9 10.0 149
INDIAN CREEK 9425 40.4 27.6 146 33.7 29.8 113
KELLEY R.S. 8180 25.8 13.2 195 29.8 23.9 125
STEEL CREEK PARK 10200 25.4 18.9 134 27.4 20.6 133
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Basin wide percent of average 172 126
UPPER BEAR RIVER
BUG LAKE 7950 36.5 16.7 219 36.4 22.7 160
HAYDEN FORK 9212 -M 11.9 * 38.1 25.5 149
KELLEY R.S. 8180 25.8 13.2 195 29.8 23.9 125
LILY LAKE 9156 27.7 10.2 272 29.0 21.4 136
MONTE CRISTO 8960 49.0 27.4 179 46.8 30.7 152
SALT RIVER SUMMIT 7760 20.9 9.6 218 26.9 21.9 123
TRIAL LAKE 9992 47.7 26.2 182 42.7 29.8 143
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Basin wide percent of average 201 142
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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.