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 THURSDAY: MAY 12 , 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 22.4 7.9 284 33.9 25.3 134
COTTONWOOD CREEK 7670 36.5 15.3 239 46.8 33.5 140
GRAND TARGHEE 9260 66.5 -M * -M -M *
GRANITE CREEK 6770 23.2 9.0 258 32.8 23.3 141
GRASSY LAKE 7265 46.4 28.3 164 54.8 42.4 129
GROS VENTRE SUMMIT 8750 20.3 10.8 188 22.2 16.1 138
GUNSIGHT PASS 9820 -M -M * 25.4 -M *
LEWIS LAKE DIVIDE 7850 56.4 30.5 185 49.0 43.1 114
PHILLIPS BENCH 8200 43.6 25.5 171 45.3 34.4 132
SALT RIVER SUMMIT 7760 18.7 6.2 302 27.7 22.6 123
SNAKE RIVER STATION 6920 -M 7.2 * 35.3 26.6 133
SPRING CREEK DIVIDE 9000 44.7 25.9 173 41.8 31.3 134
THUMB DIVIDE 7980 27.6 10.9 253 28.6 23.1 124
TOGWOTEE PASS 9580 41.8 27.8 150 -M 30.4 *
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 *
WILLOW CREEK 8380 48.2 26.8 180 55.1 39.7 139
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Basin wide percent of average 191 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 34.2 25.7 133 33.3 24.9 134
BLACK BEAR 8170 56.5 37.5 151 58.1 47.6 122
CANYON 7870 19.8 8.0 248 24.8 18.7 133
FISHER CREEK 9100 53.7 37.3 144 52.4 43.7 120
MADISON PLATEAU 7750 37.2 20.9 178 41.2 31.7 130
NORTHEAST ENTRANCE 7350 12.1 4.4 275 21.1 15.8 134
PARKER PEAK 9400 40.2 24.2 166 34.8 20.9 167
SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147
THUMB DIVIDE 7980 27.6 10.9 253 28.6 23.1 124
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 *
WHISKEY CREEK 6800 22.1 11.3 196 31.0 25.3 123
WHITE MILL 8700 37.9 25.5 149 38.0 32.7 116
WOLVERINE 7650 13.9 4.2 331 19.9 16.4 121
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Basin wide percent of average 168 129
WIND RIVER
BURROUGHS CREEK 8750 23.1 11.1 208 25.7 20.5 125
CASTLE CREEK 8400 3.3 -M * 12.0 -M *
COLD SPRINGS 9630 9.1 4.0 228 14.5 15.2 95
DEER PARK 9700 21.5 17.0 126 26.9 28.4 95
HOBBS PARK 10100 19.0 17.3 110 18.4 18.5 99
LITTLE WARM 9370 17.8 8.5 209 20.3 18.1 112
SOUTH PASS 9040 16.9 15.1 112 17.5 24.2 72
ST. LAWRENCE ALT 8620 2.2 4.5 49 13.0 13.4 97
TOGWOTEE PASS 9580 41.8 27.8 150 -M 30.4 *
TOWNSEND CREEK 8700 6.0 6.5 92 14.3 16.9 85
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Basin wide percent of average 141 97
BIGHORN BASIN
BALD MTN. 9380 33.7 23.5 143 27.6 23.0 120
BEAR TRAP MEADOW 8200 10.1 1.1 918 14.4 12.1 119
BLACKWATER 9780 39.7 28.8 138 37.5 26.2 143
BONE SPRINGS DIV 9350 29.0 16.9 172 24.2 19.9 122
EVENING STAR 9200 43.1 32.9 131 46.8 31.5 149
GRAVE SPRINGS 8550 11.4 9.2 124 13.7 14.4 95
KIRWIN 9550 17.7 11.9 149 19.7 15.5 127
MARQUETTE 8760 9.9 -M * 13.3 15.3 87
MIDDLE POWDER 7760 15.1 11.9 127 15.2 17.2 88
OWL CREEK 8975 4.5 2.8 161 10.1 9.2 110
POWDER RIVER PASS 9480 21.1 8.8 240 25.8 17.3 149
SHELL CREEK 9580 25.4 16.7 152 23.7 18.3 130
SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147
SYLVAN ROAD 7120 12.1 3.7 327 29.0 21.6 134
TIMBER CREEK 7950 5.2 2.8 186 11.4 12.0 95
YOUNTS PEAK 8350 25.0 16.5 152 24.0 20.0 120
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Basin wide percent of average 156 125
SHOSHONE RIVER
BLACKWATER 9780 39.7 28.8 138 37.5 26.2 143
EVENING STAR 9200 43.1 32.9 131 46.8 31.5 149
KIRWIN 9550 17.7 11.9 149 19.7 15.5 127
MARQUETTE 8760 9.9 -M * 13.3 15.3 87
SYLVAN LAKE 8420 32.8 21.3 154 38.6 26.2 147
SYLVAN ROAD 7120 12.1 3.7 327 29.0 21.6 134
YOUNTS PEAK 8350 25.0 16.5 152 24.0 20.0 120
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Basin wide percent of average 148 134
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.1 1.1 918 14.4 12.1 119
BIG GOOSE 7990 13.1 9.7 135 17.0 14.5 117
BONE SPRINGS DIV 9350 29.0 16.9 172 24.2 19.9 122
BURGESS JUNCTION 7880 15.8 11.1 142 18.3 16.7 110
CLOUD PEAK RESERVOIR 9860 22.4 15.4 145 22.4 18.9 119
DOME LAKE 8880 19.4 11.2 173 20.7 18.4 113
GRAVE SPRINGS 8550 11.4 9.2 124 13.7 14.4 95
HANSEN SAWMILL 8360 9.8 3.0 327 13.9 12.1 115
LITTLE GOOSE 8870 15.7 -M * 21.5 -M *
MIDDLE POWDER 7760 15.1 11.9 127 15.2 17.2 88
POWDER RIVER PASS 9480 21.1 8.8 240 25.8 17.3 149
SOLDIER PARK 8720 11.4 -M * 14.5 -M *
SUCKER CREEK 8880 19.7 11.0 179 23.0 19.1 120
TIE CREEK 6870 7.2 2.1 343 15.8 15.0 105
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Basin wide percent of average 174 115
BELLE FOURCHE
BLIND PARK 6890 5.3 .8 663* 22.7 15.6 146
COLE CANYON 5910 4.1 1.2 342 17.6 10.9 161
NORTH RAPID CREEK 6130 .0 .9 0 17.7 12.5 142
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Basin wide percent of average 324 149
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.6 12.5 261 43.1 25.1 172
COLUMBINE 9160 36.2 15.1 240 45.2 30.4 149
DIVIDE PEAK 8880 30.0 14.5 207 38.3 25.6 150
ELK RIVER 8700 26.1 9.2 284 34.9 24.2 144
JOE WRIGHT 10120 49.2 24.4 202 49.4 32.0 154
NORTH FRENCH CREEK 10130 62.3 33.8 184 -M 31.6 *
OLD BATTLE 10000 57.2 36.4 157 61.5 41.7 147
SAGE CREEK BASIN 7850 10.7 8.4 127 24.4 14.8 165
SOUTH BRUSH CREEK 8440 20.2 7.6 266 31.3 21.5 146
TOWER 10500 73.8 52.1 142 68.3 47.3 144
WEBBER SPRINGS 9250 37.2 20.0 186 47.5 32.6 146
WILLOW CREEK PASS 9540 25.7 12.3 209 25.7 16.8 153
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Basin wide percent of average 187 151
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.1 24.8 162 42.0 28.7 146
CASPER MTN. 7900 11.0 13.2 83 19.8 21.3 93
DEADMAN HILL 10220 30.7 18.7 164 32.0 22.5 142
DEER PARK 9700 21.5 17.0 126 26.9 28.4 95
LAPRELE CREEK 8375 11.6 4.3 270 19.4 17.9 108
RENO HILL 8400 17.9 10.9 164 24.5 22.1 111
ROACH 9700 26.6 14.8 180 32.5 24.0 135
SAND LAKE 10050 50.2 36.2 139 48.4 31.3 155
SOUTH PASS 9040 16.9 15.1 112 17.5 24.2 72
WINDY PEAK 7900 6.1 2.3 265 17.8 14.8 120
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Basin wide percent of average 148 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 1.5 * 22.4 19.6 114
DIVIDE PEAK 8880 30.0 14.5 207 38.3 25.6 150
OLD BATTLE 10000 57.2 36.4 157 61.5 41.7 147
SANDSTONE RS 8150 18.7 4.9 382 34.2 23.1 148
WHISKEY PARK 8950 -M 27.9 * 54.9 35.6 154
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Basin wide percent of average 190 145
UPPER GREEN RIVER
BIG SANDY OPENING 9080 18.0 10.2 176 20.6 16.9 122
BLIND BULL SUM 8650 45.5 25.8 176 31.1 26.3 118
EAST RIM DIVIDE 7930 13.1 10.3 127 18.5 14.7 126
ELKHART PARK G.S. 9400 17.8 10.3 173 18.7 17.1 109
GROS VENTRE SUMMIT 8750 20.3 10.8 188 22.2 16.1 138
GUNSIGHT PASS 9820 -M -M * 25.4 -M *
KENDALL R.S. 7740 12.6 5.2 242 21.9 17.3 127
LOOMIS PARK 8240 23.8 10.8 220 28.9 20.9 138
NEW FORK LAKE 8340 12.9 4.9 263 15.6 14.3 109
POCKET CREEK 9360 16.6 -M * 19.3 -M *
SNIDER BASIN 8060 20.8 8.9 234 24.5 19.3 127
SPRING CREEK DIVIDE 9000 44.7 25.9 173 41.8 31.3 134
TRIPLE PEAK 8500 41.1 18.9 217 44.8 30.0 149
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Basin wide percent of average 191 129
LOWER GREEN RIVER
HAMS FORK 7840 10.8 2.2 491 19.5 15.7 124
HEWINTA 9519 15.4 5.5 280 24.6 18.8 131
HICKERSON PARK 9145 1.4 2.8 50 14.6 11.1 132
HOLE-IN-ROCK 9150 6.5 2.3 283 16.3 10.7 152
INDIAN CREEK 9425 39.2 25.0 157 34.5 30.7 112
KELLEY R.S. 8180 22.9 10.3 222 30.5 24.6 124
STEEL CREEK PARK 10200 26.3 18.6 141 28.8 21.4 135
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Basin wide percent of average 184 127
UPPER BEAR RIVER
BUG LAKE 7950 34.8 12.5 278 36.9 23.5 157
HAYDEN FORK 9212 25.8 8.6 300 39.1 26.4 148
KELLEY R.S. 8180 22.9 10.3 222 30.5 24.6 124
LILY LAKE 9156 25.6 7.4 346 30.3 22.3 136
MONTE CRISTO 8960 48.2 24.1 200 47.6 31.9 149
SALT RIVER SUMMIT 7760 18.7 6.2 302 27.7 22.6 123
TRIAL LAKE 9992 50.0 24.3 206 44.0 30.9 142
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Basin wide percent of average 242 141
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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.