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 TUESDAY: MAY 10 , 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 8.7 263 33.3 25.2 132
COTTONWOOD CREEK 7670 36.9 16.2 228 46.8 33.2 141
GRAND TARGHEE 9260 65.9 -M * 46.0 -M *
GRANITE CREEK 6770 23.7 9.7 244 32.5 23.1 141
GRASSY LAKE 7265 46.2 29.3 158 54.6 42.2 129
GROS VENTRE SUMMIT 8750 20.1 11.3 178 21.5 16.0 134
GUNSIGHT PASS 9820 -M -M * 24.6 -M *
LEWIS LAKE DIVIDE 7850 56.9 31.4 181 48.8 42.8 114
PHILLIPS BENCH 8200 43.7 26.4 166 44.9 34.2 131
SALT RIVER SUMMIT 7760 19.1 7.1 269 27.7 22.4 124
SNAKE RIVER STATION 6920 -M 8.2 * 35.2 26.4 133
SPRING CREEK DIVIDE 9000 44.9 26.6 169 41.5 31.1 133
THUMB DIVIDE 7980 28.0 11.7 239 28.4 22.9 124
TOGWOTEE PASS 9580 41.1 28.0 147 40.4 30.2 134
TWO OCEAN PLATEAU 9240 -M 31.4 * -M 33.4 *
WILLOW CREEK 8380 48.3 27.6 175 54.7 39.3 139
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Basin wide percent of average 185 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 34.3 25.9 132 33.3 24.6 135
BLACK BEAR 8170 56.9 38.1 149 57.9 47.3 122
CANYON 7870 20.6 8.6 240 24.6 18.5 133
FISHER CREEK 9100 53.5 37.4 143 52.1 43.4 120
MADISON PLATEAU 7750 37.3 21.5 173 41.1 31.5 130
NORTHEAST ENTRANCE 7350 13.3 5.0 266 21.1 15.6 135
PARKER PEAK 9400 40.1 24.4 164 34.6 20.6 168
SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148
THUMB DIVIDE 7980 28.0 11.7 239 28.4 22.9 124
TWO OCEAN PLATEAU 9240 -M 31.4 * -M 33.4 *
WHISKEY CREEK 6800 22.7 12.1 188 30.6 25.1 122
WHITE MILL 8700 37.9 25.8 147 37.9 32.4 117
WOLVERINE 7650 14.9 4.7 317 19.5 16.1 121
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Basin wide percent of average 166 130
WIND RIVER
BURROUGHS CREEK 8750 22.4 11.4 196 24.7 20.3 122
CASTLE CREEK 8400 2.9 -M * 11.4 -M *
COLD SPRINGS 9630 8.6 4.2 205 13.7 15.0 91
DEER PARK 9700 21.3 16.3 131 26.5 28.1 94
HOBBS PARK 10100 18.1 17.3 105 17.7 18.3 97
LITTLE WARM 9370 17.1 8.9 192 19.4 17.9 108
SOUTH PASS 9040 16.7 15.7 106 17.4 23.9 73
ST. LAWRENCE ALT 8620 1.5 4.8 31 12.3 13.2 93
TOGWOTEE PASS 9580 41.1 28.0 147 40.4 30.2 134
TOWNSEND CREEK 8700 5.6 7.0 80 14.0 16.7 84
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Basin wide percent of average 134 101
BIGHORN BASIN
BALD MTN. 9380 33.3 23.6 141 27.0 22.7 119
BEAR TRAP MEADOW 8200 9.3 1.4 664 13.3 11.9 112
BLACKWATER 9780 39.0 28.7 136 36.7 26.0 141
BONE SPRINGS DIV 9350 28.4 17.2 165 23.8 19.6 121
EVENING STAR 9200 42.7 33.2 129 46.4 31.2 149
GRAVE SPRINGS 8550 11.1 9.6 116 13.4 14.2 94
KIRWIN 9550 17.2 12.1 142 19.1 15.3 125
MARQUETTE 8760 8.8 -M * 12.3 15.1 81
MIDDLE POWDER 7760 13.8 12.4 111 14.6 16.9 86
OWL CREEK 8975 4.0 3.1 129 9.5 9.1 104
POWDER RIVER PASS 9480 20.3 9.2 221 25.0 17.0 147
SHELL CREEK 9580 24.5 16.9 145 22.7 18.0 126
SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148
SYLVAN ROAD 7120 12.4 4.8 258 28.8 21.4 135
TIMBER CREEK 7950 4.5 3.3 136 10.5 11.8 89
YOUNTS PEAK 8350 24.5 16.8 146 23.6 19.7 120
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Basin wide percent of average 149 123
SHOSHONE RIVER
BLACKWATER 9780 39.0 28.7 136 36.7 26.0 141
EVENING STAR 9200 42.7 33.2 129 46.4 31.2 149
KIRWIN 9550 17.2 12.1 142 19.1 15.3 125
MARQUETTE 8760 8.8 -M * 12.3 15.1 81
SYLVAN LAKE 8420 33.3 21.8 153 38.4 25.9 148
SYLVAN ROAD 7120 12.4 4.8 258 28.8 21.4 135
YOUNTS PEAK 8350 24.5 16.8 146 23.6 19.7 120
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Basin wide percent of average 144 133
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.3 1.4 664 13.3 11.9 112
BIG GOOSE 7990 12.6 10.1 125 16.3 14.2 115
BONE SPRINGS DIV 9350 28.4 17.2 165 23.8 19.6 121
BURGESS JUNCTION 7880 15.4 11.7 132 17.7 16.5 107
CLOUD PEAK RESERVOIR 9860 21.7 15.6 139 21.8 18.6 117
DOME LAKE 8880 19.1 11.6 165 20.0 18.1 110
GRAVE SPRINGS 8550 11.1 9.6 116 13.4 14.2 94
HANSEN SAWMILL 8360 9.0 3.5 257 12.9 11.9 108
LITTLE GOOSE 8870 15.2 -M * 20.8 -M *
MIDDLE POWDER 7760 13.8 12.4 111 14.6 16.9 86
POWDER RIVER PASS 9480 20.3 9.2 221 25.0 17.0 147
SOLDIER PARK 8720 10.8 -M * 13.9 -M *
SUCKER CREEK 8880 18.8 11.6 162 21.9 18.8 116
TIE CREEK 6870 7.0 2.5 280 15.4 14.7 105
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Basin wide percent of average 160 112
BELLE FOURCHE
BLIND PARK 6890 5.8 1.6 363 22.2 15.3 145
COLE CANYON 5910 5.0 1.7 294 17.1 10.7 160
NORTH RAPID CREEK 6130 .9 1.3 69 17.4 12.3 141
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Basin wide percent of average 254 148
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.0 13.4 239 42.6 24.8 172
COLUMBINE 9160 36.6 16.3 225 44.5 30.2 147
DIVIDE PEAK 8880 29.7 15.5 192 37.5 25.3 148
ELK RIVER 8700 26.3 10.3 255 34.5 24.0 144
JOE WRIGHT 10120 48.2 24.7 195 48.5 31.6 153
NORTH FRENCH CREEK 10130 62.5 34.2 183 -M 31.3 *
OLD BATTLE 10000 56.8 36.8 154 61.4 41.4 148
SAGE CREEK BASIN 7850 11.2 9.0 124 24.2 14.7 165
SOUTH BRUSH CREEK 8440 20.9 8.3 252 31.0 21.3 146
TOWER 10500 73.2 52.3 140 -M 46.9 *
WEBBER SPRINGS 9250 37.9 21.2 179 46.7 32.4 144
WILLOW CREEK PASS 9540 25.5 12.8 199 25.1 16.6 151
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Basin wide percent of average 181 151
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.7 25.7 158 41.7 28.4 147
CASPER MTN. 7900 10.9 14.1 77 19.2 21.0 91
DEADMAN HILL 10220 30.4 19.1 159 31.0 22.2 140
DEER PARK 9700 21.3 16.3 131 26.5 28.1 94
LAPRELE CREEK 8375 11.6 4.8 242 18.8 17.6 107
RENO HILL 8400 16.7 11.8 142 23.2 21.7 107
ROACH 9700 26.3 15.7 168 31.6 23.7 133
SAND LAKE 10050 49.8 36.6 136 47.9 31.0 155
SOUTH PASS 9040 16.7 15.7 106 17.4 23.9 73
WINDY PEAK 7900 6.3 2.7 233 17.3 14.6 118
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Basin wide percent of average 142 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 2.0 * 22.3 19.4 115
DIVIDE PEAK 8880 29.7 15.5 192 37.5 25.3 148
OLD BATTLE 10000 56.8 36.8 154 61.4 41.4 148
SANDSTONE RS 8150 20.2 5.8 348 34.1 22.9 149
WHISKEY PARK 8950 -M 28.6 * 54.3 35.3 154
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Basin wide percent of average 184 145
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.8 10.9 163 20.3 16.8 121
BLIND BULL SUM 8650 45.5 26.2 174 30.8 26.1 118
EAST RIM DIVIDE 7930 13.6 10.9 125 18.2 14.5 126
ELKHART PARK G.S. 9400 17.7 10.9 162 18.4 16.9 109
GROS VENTRE SUMMIT 8750 20.1 11.3 178 21.5 16.0 134
GUNSIGHT PASS 9820 -M -M * 24.6 -M *
KENDALL R.S. 7740 12.9 6.2 208 21.6 17.2 126
LOOMIS PARK 8240 23.6 11.5 205 28.4 20.7 137
NEW FORK LAKE 8340 13.1 5.6 234 15.2 14.1 108
POCKET CREEK 9360 16.1 -M * 19.1 -M *
SNIDER BASIN 8060 20.5 9.7 211 24.3 19.1 127
SPRING CREEK DIVIDE 9000 44.9 26.6 169 41.5 31.1 133
TRIPLE PEAK 8500 41.2 19.9 207 44.5 29.7 150
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Basin wide percent of average 181 128
LOWER GREEN RIVER
HAMS FORK 7840 11.9 2.9 410 19.4 15.5 125
HEWINTA 9519 14.7 6.2 237 24.1 18.6 130
HICKERSON PARK 9145 1.4 3.3 42 14.3 11.0 130
HOLE-IN-ROCK 9150 -M 2.8 * 16.2 10.5 154
INDIAN CREEK 9425 39.0 25.7 152 34.3 30.5 112
KELLEY R.S. 8180 23.0 11.1 207 30.4 24.4 125
STEEL CREEK PARK 10200 25.8 18.8 137 28.1 21.2 133
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Basin wide percent of average 170 127
UPPER BEAR RIVER
BUG LAKE 7950 34.6 13.6 254 36.8 23.3 158
HAYDEN FORK 9212 25.9 9.5 273 38.7 26.2 148
KELLEY R.S. 8180 23.0 11.1 207 30.4 24.4 125
LILY LAKE 9156 25.2 8.1 311 29.9 22.1 135
MONTE CRISTO 8960 48.5 25.0 194 47.3 31.6 150
SALT RIVER SUMMIT 7760 19.1 7.1 269 27.7 22.4 124
TRIAL LAKE 9992 -M 24.9 * 43.5 30.7 142
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Basin wide percent of average 237 141
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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.