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 SUNDAY: MAY 8 , 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 23.0 9.6 240 31.5 25.0 126
COTTONWOOD CREEK 7670 35.7 17.1 209 45.6 32.9 139
GRAND TARGHEE 9260 63.7 -M * 46.1 -M *
GRANITE CREEK 6770 23.9 10.5 228 31.2 23.0 136
GRASSY LAKE 7265 46.5 30.3 153 52.9 41.9 126
GROS VENTRE SUMMIT 8750 18.5 11.8 157 19.9 15.8 126
GUNSIGHT PASS 9820 -M -M * 22.7 -M *
LEWIS LAKE DIVIDE 7850 56.9 32.2 177 47.7 42.6 112
PHILLIPS BENCH 8200 43.2 27.2 159 43.2 34.0 127
SALT RIVER SUMMIT 7760 18.9 8.0 236 27.0 22.2 122
SNAKE RIVER STATION 6920 -M 9.1 * 34.1 26.2 130
SPRING CREEK DIVIDE 9000 45.1 27.2 166 40.6 30.9 131
THUMB DIVIDE 7980 27.9 12.5 223 27.5 22.7 121
TOGWOTEE PASS 9580 38.8 28.1 138 40.1 29.9 134
TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.1 *
WILLOW CREEK 8380 48.4 28.5 170 53.5 39.0 137
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Basin wide percent of average 176 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.9 25.9 131 32.8 24.4 134
BLACK BEAR 8170 -M 38.5 * 57.1 47.0 121
CANYON 7870 20.8 9.1 229 23.9 18.3 131
FISHER CREEK 9100 52.7 37.7 140 51.1 43.0 119
MADISON PLATEAU 7750 36.6 22.2 165 40.3 31.2 129
NORTHEAST ENTRANCE 7350 14.1 5.4 261 20.5 15.4 133
PARKER PEAK 9400 38.9 24.5 159 -M 20.4 *
SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146
THUMB DIVIDE 7980 27.9 12.5 223 27.5 22.7 121
TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.1 *
WHISKEY CREEK 6800 23.1 12.7 182 29.8 24.9 120
WHITE MILL 8700 37.5 25.9 145 37.1 32.2 115
WOLVERINE 7650 15.4 5.4 285 19.1 15.9 120
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Basin wide percent of average 164 125
WIND RIVER
BURROUGHS CREEK 8750 21.2 11.8 180 22.8 20.1 113
CASTLE CREEK 8400 3.4 -M * 10.9 -M *
COLD SPRINGS 9630 6.7 4.4 152 11.8 14.8 80
DEER PARK 9700 21.7 16.5 132 26.4 27.8 95
HOBBS PARK 10100 18.2 17.4 105 17.4 18.0 97
LITTLE WARM 9370 14.9 9.3 160 16.9 17.7 95
SOUTH PASS 9040 17.8 16.3 109 17.4 23.7 73
ST. LAWRENCE ALT 8620 .6 5.1 12 10.0 12.9 78
TOGWOTEE PASS 9580 38.8 28.1 138 40.1 29.9 134
TOWNSEND CREEK 8700 7.2 7.4 97 13.8 16.4 84
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Basin wide percent of average 126 97
BIGHORN BASIN
BALD MTN. 9380 32.5 23.5 138 26.3 22.4 117
BEAR TRAP MEADOW 8200 9.9 1.6 619 12.7 11.7 109
BLACKWATER 9780 37.4 28.7 130 35.3 25.7 137
BONE SPRINGS DIV 9350 28.2 17.4 162 23.1 19.3 120
EVENING STAR 9200 41.9 33.3 126 44.8 31.0 145
GRAVE SPRINGS 8550 11.7 9.6 122 12.8 14.0 91
KIRWIN 9550 16.4 12.4 132 18.0 15.0 120
MARQUETTE 8760 6.8 -M * 10.4 14.8 70
MIDDLE POWDER 7760 14.4 12.8 113 14.6 16.7 87
OWL CREEK 8975 4.1 3.3 124 9.2 8.9 103
POWDER RIVER PASS 9480 20.4 9.4 217 24.3 16.7 146
SHELL CREEK 9580 24.3 16.9 144 22.0 17.8 124
SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146
SYLVAN ROAD 7120 12.4 5.6 221 27.5 21.2 130
TIMBER CREEK 7950 3.2 3.6 89 8.2 11.5 71
YOUNTS PEAK 8350 23.2 17.2 135 21.6 19.5 111
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Basin wide percent of average 144 119
SHOSHONE RIVER
BLACKWATER 9780 37.4 28.7 130 35.3 25.7 137
EVENING STAR 9200 41.9 33.3 126 44.8 31.0 145
KIRWIN 9550 16.4 12.4 132 18.0 15.0 120
MARQUETTE 8760 6.8 -M * 10.4 14.8 70
SYLVAN LAKE 8420 33.0 22.3 148 37.4 25.7 146
SYLVAN ROAD 7120 12.4 5.6 221 27.5 21.2 130
YOUNTS PEAK 8350 23.2 17.2 135 21.6 19.5 111
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Basin wide percent of average 137 128
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.9 1.6 619 12.7 11.7 109
BIG GOOSE 7990 12.8 10.4 123 15.7 13.9 113
BONE SPRINGS DIV 9350 28.2 17.4 162 23.1 19.3 120
BURGESS JUNCTION 7880 15.8 12.0 132 17.1 16.3 105
CLOUD PEAK RESERVOIR 9860 21.9 15.6 140 21.3 18.3 116
DOME LAKE 8880 19.1 12.0 159 19.3 17.8 108
GRAVE SPRINGS 8550 11.7 9.6 122 12.8 14.0 91
HANSEN SAWMILL 8360 9.4 3.7 254 12.2 11.7 104
LITTLE GOOSE 8870 15.3 -M * 20.1 -M *
MIDDLE POWDER 7760 14.4 12.8 113 14.6 16.7 87
POWDER RIVER PASS 9480 20.4 9.4 217 24.3 16.7 146
SOLDIER PARK 8720 11.2 -M * 13.3 -M *
SUCKER CREEK 8880 18.9 11.7 162 21.3 18.5 115
TIE CREEK 6870 7.7 2.6 296 15.0 14.5 103
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Basin wide percent of average 160 111
BELLE FOURCHE
BLIND PARK 6890 8.3 2.3 361 21.8 15.0 145
COLE CANYON 5910 6.9 2.2 314 16.7 10.4 161
NORTH RAPID CREEK 6130 3.2 1.7 188 17.3 12.1 143
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Basin wide percent of average 297 149
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.4 14.1 230 42.6 24.5 174
COLUMBINE 9160 38.8 17.5 222 44.6 30.0 149
DIVIDE PEAK 8880 32.2 16.5 195 37.2 25.1 148
ELK RIVER 8700 28.0 11.4 246 34.4 23.8 145
JOE WRIGHT 10120 48.7 24.9 196 48.5 31.3 155
NORTH FRENCH CREEK 10130 63.3 34.4 184 61.6 30.9 199
OLD BATTLE 10000 57.5 37.1 155 -M 41.1 *
SAGE CREEK BASIN 7850 13.5 9.6 141 24.2 14.6 166
SOUTH BRUSH CREEK 8440 22.7 9.0 252 31.0 21.1 147
TOWER 10500 73.5 52.4 140 -M 46.6 *
WEBBER SPRINGS 9250 39.5 22.3 177 46.5 32.1 145
WILLOW CREEK PASS 9540 26.7 13.3 201 25.1 16.4 153
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Basin wide percent of average 182 158
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.0 26.5 158 41.7 28.1 148
CASPER MTN. 7900 12.4 15.0 83 18.8 20.7 91
DEADMAN HILL 10220 31.2 19.4 161 31.1 22.0 141
DEER PARK 9700 21.7 16.5 132 26.4 27.8 95
LAPRELE CREEK 8375 12.6 5.3 238 18.3 17.4 105
RENO HILL 8400 17.7 12.5 142 22.9 21.4 107
ROACH 9700 28.0 16.5 170 31.6 23.4 135
SAND LAKE 10050 50.1 36.8 136 47.9 30.6 157
SOUTH PASS 9040 17.8 16.3 109 17.4 23.7 73
WINDY PEAK 7900 7.7 3.2 241 17.1 14.4 119
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Basin wide percent of average 144 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 2.6 * 22.3 19.2 116
DIVIDE PEAK 8880 32.2 16.5 195 37.2 25.1 148
OLD BATTLE 10000 57.5 37.1 155 -M 41.1 *
SANDSTONE RS 8150 22.7 6.6 344 34.0 22.7 150
WHISKEY PARK 8950 -M 29.2 * 54.0 35.0 154
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Basin wide percent of average 187 145
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.7 11.5 154 19.9 16.6 120
BLIND BULL SUM 8650 45.3 26.7 170 29.9 25.9 115
EAST RIM DIVIDE 7930 13.4 11.5 117 17.3 14.4 120
ELKHART PARK G.S. 9400 17.5 11.4 154 17.8 16.7 107
GROS VENTRE SUMMIT 8750 18.5 11.8 157 19.9 15.8 126
GUNSIGHT PASS 9820 -M -M * 22.7 -M *
KENDALL R.S. 7740 12.4 7.1 175 20.2 17.0 119
LOOMIS PARK 8240 23.2 12.2 190 27.2 20.5 133
NEW FORK LAKE 8340 13.0 6.3 206 14.4 14.0 103
POCKET CREEK 9360 -M -M * 18.7 -M *
SNIDER BASIN 8060 20.5 10.5 195 23.4 19.0 123
SPRING CREEK DIVIDE 9000 45.1 27.2 166 40.6 30.9 131
TRIPLE PEAK 8500 41.0 20.9 196 43.4 29.5 147
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Basin wide percent of average 170 124
LOWER GREEN RIVER
HAMS FORK 7840 13.0 3.6 361 19.3 15.4 125
HEWINTA 9519 15.0 6.9 217 23.6 18.5 128
HICKERSON PARK 9145 1.4 3.9 36 13.3 10.8 123
HOLE-IN-ROCK 9150 6.6 3.2 206 15.0 10.3 146
INDIAN CREEK 9425 39.8 26.4 151 33.8 30.2 112
KELLEY R.S. 8180 23.4 11.8 198 29.9 24.2 124
STEEL CREEK PARK 10200 25.6 18.9 135 27.3 21.0 130
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Basin wide percent of average 167 124
UPPER BEAR RIVER
BUG LAKE 7950 35.7 14.7 243 36.4 23.1 158
HAYDEN FORK 9212 26.8 10.3 260 38.1 26.0 147
KELLEY R.S. 8180 23.4 11.8 198 29.9 24.2 124
LILY LAKE 9156 25.6 8.8 291 29.0 21.9 132
MONTE CRISTO 8960 49.4 25.9 191 47.0 31.3 150
SALT RIVER SUMMIT 7760 18.9 8.0 236 27.0 22.2 122
TRIAL LAKE 9992 -M 25.4 * 42.7 30.4 140
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Basin wide percent of average 226 140
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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.