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 FRIDAY: MAY 13 , 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 21.3 7.4 288 33.8 25.4 133
COTTONWOOD CREEK 7670 36.4 14.9 244 46.8 33.6 139
GRAND TARGHEE 9260 66.4 -M * -M -M *
GRANITE CREEK 6770 22.4 8.6 260 32.8 23.4 140
GRASSY LAKE 7265 46.2 27.7 167 54.8 42.6 129
GROS VENTRE SUMMIT 8750 20.0 10.5 190 22.2 16.2 137
GUNSIGHT PASS 9820 -M -M * 25.4 -M *
LEWIS LAKE DIVIDE 7850 56.1 30.0 187 49.1 43.2 114
PHILLIPS BENCH 8200 43.6 25.1 174 45.5 34.6 132
SALT RIVER SUMMIT 7760 17.9 5.8 309 27.7 22.6 123
SNAKE RIVER STATION 6920 -M 6.7 * 35.3 26.7 132
SPRING CREEK DIVIDE 9000 45.1 25.5 177 41.8 31.4 133
THUMB DIVIDE 7980 26.1 10.5 249 28.6 23.2 123
TOGWOTEE PASS 9580 41.5 27.7 150 -M 30.6 *
TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 *
WILLOW CREEK 8380 48.8 26.3 186 55.0 39.8 138
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Basin wide percent of average 193 131
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.9 25.7 132 33.4 25.0 134
BLACK BEAR 8170 57.1 37.2 153 58.1 47.7 122
CANYON 7870 18.7 7.7 243 24.8 18.8 132
FISHER CREEK 9100 53.3 37.2 143 52.4 43.8 120
MADISON PLATEAU 7750 36.9 20.5 180 41.2 31.9 129
NORTHEAST ENTRANCE 7350 10.8 4.1 263 21.1 15.8 134
PARKER PEAK 9400 40.1 24.2 166 34.9 21.0 166
SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147
THUMB DIVIDE 7980 26.1 10.5 249 28.6 23.2 123
TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 *
WHISKEY CREEK 6800 21.4 10.8 198 31.0 25.4 122
WHITE MILL 8700 37.6 25.3 149 38.0 32.8 116
WOLVERINE 7650 12.9 3.9 331 20.0 16.5 121
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Basin wide percent of average 167 129
WIND RIVER
BURROUGHS CREEK 8750 22.7 10.9 208 25.8 20.7 125
CASTLE CREEK 8400 2.4 -M * 12.0 -M *
COLD SPRINGS 9630 8.8 3.7 238 14.5 15.3 95
DEER PARK 9700 21.2 17.2 123 27.1 28.5 95
HOBBS PARK 10100 18.7 17.1 109 18.7 18.7 100
LITTLE WARM 9370 17.4 8.3 210 20.4 18.2 112
SOUTH PASS 9040 16.6 14.7 113 17.6 24.3 72
ST. LAWRENCE ALT 8620 1.8 4.3 42 13.0 13.5 96
TOGWOTEE PASS 9580 41.5 27.7 150 -M 30.6 *
TOWNSEND CREEK 8700 5.5 6.3 87 14.4 17.0 85
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Basin wide percent of average 140 97
BIGHORN BASIN
BALD MTN. 9380 33.6 23.4 144 27.7 23.1 120
BEAR TRAP MEADOW 8200 10.1 1.0 1010 14.4 12.2 118
BLACKWATER 9780 39.6 28.9 137 37.5 26.4 142
BONE SPRINGS DIV 9350 28.8 16.7 172 24.3 20.0 122
EVENING STAR 9200 42.5 32.8 130 46.8 31.7 148
GRAVE SPRINGS 8550 11.2 8.8 127 13.7 14.5 94
KIRWIN 9550 17.5 11.6 151 19.7 15.6 126
MARQUETTE 8760 10.0 -M * 13.4 15.5 86
MIDDLE POWDER 7760 14.9 11.7 127 15.4 17.3 89
OWL CREEK 8975 4.1 2.6 158 10.1 9.3 109
POWDER RIVER PASS 9480 21.0 8.6 244 25.8 17.4 148
SHELL CREEK 9580 25.1 16.7 150 23.7 18.4 129
SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147
SYLVAN ROAD 7120 10.2 3.3 309 29.0 21.7 134
TIMBER CREEK 7950 4.7 2.5 188 11.4 12.1 94
YOUNTS PEAK 8350 24.7 16.1 153 24.0 20.1 119
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Basin wide percent of average 155 125
SHOSHONE RIVER
BLACKWATER 9780 39.6 28.9 137 37.5 26.4 142
EVENING STAR 9200 42.5 32.8 130 46.8 31.7 148
KIRWIN 9550 17.5 11.6 151 19.7 15.6 126
MARQUETTE 8760 10.0 -M * 13.4 15.5 86
SYLVAN LAKE 8420 31.4 21.1 149 38.6 26.3 147
SYLVAN ROAD 7120 10.2 3.3 309 29.0 21.7 134
YOUNTS PEAK 8350 24.7 16.1 153 24.0 20.1 119
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Basin wide percent of average 146 133
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.1 1.0 1010 14.4 12.2 118
BIG GOOSE 7990 12.9 9.5 136 17.0 14.6 116
BONE SPRINGS DIV 9350 28.8 16.7 172 24.3 20.0 122
BURGESS JUNCTION 7880 15.5 10.8 144 18.3 16.8 109
CLOUD PEAK RESERVOIR 9860 22.2 15.1 147 22.5 19.1 118
DOME LAKE 8880 19.2 11.0 175 20.7 18.5 112
GRAVE SPRINGS 8550 11.2 8.8 127 13.7 14.5 94
HANSEN SAWMILL 8360 9.8 2.7 363 13.9 12.2 114
LITTLE GOOSE 8870 15.7 -M * 21.5 -M *
MIDDLE POWDER 7760 14.9 11.7 127 15.4 17.3 89
POWDER RIVER PASS 9480 21.0 8.6 244 25.8 17.4 148
SOLDIER PARK 8720 11.4 -M * 14.5 -M *
SUCKER CREEK 8880 19.5 10.8 181 23.0 19.2 120
TIE CREEK 6870 6.8 1.7 400 15.9 15.1 105
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Basin wide percent of average 177 114
BELLE FOURCHE
BLIND PARK 6890 5.4 .5 1080* 22.9 15.7 146
COLE CANYON 5910 3.8 1.0 380 17.8 11.0 162
NORTH RAPID CREEK 6130 .0 .8 0* 17.8 12.5 142
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Basin wide percent of average 400* 149
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.4 12.0 270 43.1 25.2 171
COLUMBINE 9160 36.0 14.5 248 45.2 30.5 148
DIVIDE PEAK 8880 29.9 13.9 215 38.2 25.7 149
ELK RIVER 8700 26.0 8.7 299 34.9 24.3 144
JOE WRIGHT 10120 49.9 24.2 206 49.8 32.1 155
NORTH FRENCH CREEK 10130 62.5 33.6 186 -M 31.7 *
OLD BATTLE 10000 57.1 36.1 158 61.5 41.9 147
SAGE CREEK BASIN 7850 10.7 8.1 132 24.3 14.9 163
SOUTH BRUSH CREEK 8440 20.5 7.2 285 31.5 21.7 145
TOWER 10500 73.8 51.9 142 68.3 47.4 144
WEBBER SPRINGS 9250 36.5 19.4 188 47.6 32.7 146
WILLOW CREEK PASS 9540 26.1 11.9 219 26.2 16.9 155
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Basin wide percent of average 191 150
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.1 24.2 166 42.1 28.9 146
CASPER MTN. 7900 11.2 12.7 88 19.9 21.5 93
DEADMAN HILL 10220 31.0 18.5 168 32.3 22.6 143
DEER PARK 9700 21.2 17.2 123 27.1 28.5 95
LAPRELE CREEK 8375 11.8 4.1 288 19.4 18.0 108
RENO HILL 8400 18.1 10.5 172 24.6 22.2 111
ROACH 9700 26.6 14.4 185 32.6 24.1 135
SAND LAKE 10050 50.4 36.0 140 48.7 31.5 155
SOUTH PASS 9040 16.6 14.7 113 17.6 24.3 72
WINDY PEAK 7900 6.1 2.1 290 17.9 15.0 119
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Basin wide percent of average 151 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 1.2 * 22.4 19.6 114
DIVIDE PEAK 8880 29.9 13.9 215 38.2 25.7 149
OLD BATTLE 10000 57.1 36.1 158 61.5 41.9 147
SANDSTONE RS 8150 18.1 4.5 402 34.2 23.2 147
WHISKEY PARK 8950 -M 27.5 * 54.9 35.8 153
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Basin wide percent of average 193 144
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.7 9.8 181 20.6 17.0 121
BLIND BULL SUM 8650 45.2 25.5 177 31.1 26.4 118
EAST RIM DIVIDE 7930 11.6 9.9 117 18.5 14.7 126
ELKHART PARK G.S. 9400 17.6 10.0 176 18.7 17.2 109
GROS VENTRE SUMMIT 8750 20.0 10.5 190 22.2 16.2 137
GUNSIGHT PASS 9820 -M -M * 25.4 -M *
KENDALL R.S. 7740 11.7 4.7 249 21.8 17.4 125
LOOMIS PARK 8240 23.0 10.4 221 29.0 21.0 138
NEW FORK LAKE 8340 12.0 4.6 261 15.6 14.4 108
POCKET CREEK 9360 16.1 -M * 19.3 -M *
SNIDER BASIN 8060 19.9 8.5 234 24.5 19.3 127
SPRING CREEK DIVIDE 9000 45.1 25.5 177 41.8 31.4 133
TRIPLE PEAK 8500 40.6 18.3 222 44.8 30.1 149
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Basin wide percent of average 192 128
LOWER GREEN RIVER
HAMS FORK 7840 9.9 1.8 550 19.5 15.7 124
HEWINTA 9519 14.8 5.2 285 24.6 18.9 130
HICKERSON PARK 9145 .5 2.6 19 14.5 11.2 129
HOLE-IN-ROCK 9150 6.0 2.1 286 16.3 10.8 151
INDIAN CREEK 9425 39.1 24.6 159 34.5 30.8 112
KELLEY R.S. 8180 22.2 9.9 224 30.5 24.7 123
STEEL CREEK PARK 10200 26.3 18.5 142 28.8 21.5 134
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Basin wide percent of average 184 126
UPPER BEAR RIVER
BUG LAKE 7950 34.7 12.0 289 36.9 23.6 156
HAYDEN FORK 9212 25.1 8.2 306 39.1 26.6 147
KELLEY R.S. 8180 22.2 9.9 224 30.5 24.7 123
LILY LAKE 9156 24.9 7.0 356 30.3 22.4 135
MONTE CRISTO 8960 48.5 23.6 206 47.7 32.0 149
SALT RIVER SUMMIT 7760 17.9 5.8 309 27.7 22.6 123
TRIAL LAKE 9992 49.8 23.9 208 44.0 31.1 141
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Basin wide percent of average 247 140
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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.