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 18 , 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 17.0 5.2 327 34.0 25.9 131
COTTONWOOD CREEK 7670 32.7 12.5 262 46.9 34.2 137
GRAND TARGHEE 9260 68.7 -M * -M -M *
GRANITE CREEK 6770 18.9 6.7 282 33.1 23.8 139
GRASSY LAKE 7265 41.5 24.7 168 55.0 43.3 127
GROS VENTRE SUMMIT 8750 19.1 8.9 215 22.5 16.6 136
GUNSIGHT PASS 9820 -M -M * 25.9 -M *
LEWIS LAKE DIVIDE 7850 52.0 27.3 190 49.1 43.8 112
PHILLIPS BENCH 8200 40.9 22.5 182 45.7 35.1 130
SALT RIVER SUMMIT 7760 13.9 3.4 409 27.8 23.1 120
SNAKE RIVER STATION 6920 -M 4.2 * 35.3 27.2 130
SPRING CREEK DIVIDE 9000 42.3 23.3 182 41.8 31.9 131
THUMB DIVIDE 7980 20.5 8.4 244 28.6 23.7 121
TOGWOTEE PASS 9580 41.4 26.8 154 43.4 31.2 139
TWO OCEAN PLATEAU 9240 52.2 30.1 173 43.0 34.5 125
WILLOW CREEK 8380 43.5 23.6 184 55.2 40.6 136
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Basin wide percent of average 195 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 32.8 25.1 131 33.4 25.5 131
BLACK BEAR 8170 53.2 35.3 151 58.3 48.4 120
CANYON 7870 18.2 5.9 308 25.0 19.3 130
FISHER CREEK 9100 51.6 35.7 145 52.5 44.6 118
MADISON PLATEAU 7750 33.0 18.0 183 41.3 32.5 127
NORTHEAST ENTRANCE 7350 6.4 2.2 291 21.1 16.3 129
PARKER PEAK 9400 38.3 23.6 162 34.3 21.6 159
SYLVAN LAKE 8420 28.3 19.3 147 38.6 27.0 143
THUMB DIVIDE 7980 20.5 8.4 244 28.6 23.7 121
TWO OCEAN PLATEAU 9240 52.2 30.1 173 43.0 34.5 125
WHISKEY CREEK 6800 17.7 8.2 216 30.9 25.9 119
WHITE MILL 8700 36.2 23.9 151 38.2 33.5 114
WOLVERINE 7650 8.2 2.0 410 19.9 17.0 117
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Basin wide percent of average 167 126
WIND RIVER
BURROUGHS CREEK 8750 22.4 9.6 233 26.4 21.2 125
CASTLE CREEK 8400 .7 -M * 12.6 -M *
COLD SPRINGS 9630 7.9 2.8 282 14.6 15.8 92
DEER PARK 9700 20.4 17.1 119 27.2 29.3 93
HOBBS PARK 10100 18.6 16.2 115 19.1 19.3 99
LITTLE WARM 9370 17.2 6.8 253 20.6 18.7 110
SOUTH PASS 9040 14.9 12.6 118 17.7 24.8 71
ST. LAWRENCE ALT 8620 .0 2.9 0 13.4 14.0 96
TOGWOTEE PASS 9580 41.4 26.8 154 43.4 31.2 139
TOWNSEND CREEK 8700 3.6 5.0 72 14.9 17.5 85
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Basin wide percent of average 147 103
BIGHORN BASIN
BALD MTN. 9380 33.5 22.5 149 28.3 23.8 119
BEAR TRAP MEADOW 8200 8.9 .4 2225* 14.7 12.8 115
BLACKWATER 9780 39.0 28.8 135 37.6 27.0 139
BONE SPRINGS DIV 9350 27.8 15.5 179 24.8 20.6 120
EVENING STAR 9200 40.3 31.8 127 46.8 32.4 144
GRAVE SPRINGS 8550 10.7 6.2 173 14.3 14.9 96
KIRWIN 9550 16.4 10.4 158 20.0 16.1 124
MARQUETTE 8760 9.3 -M * 13.8 16.2 85
MIDDLE POWDER 7760 14.2 9.6 148 15.5 17.8 87
OWL CREEK 8975 3.2 1.9 168 11.2 9.8 114
POWDER RIVER PASS 9480 20.7 7.1 292 26.4 18.0 147
SHELL CREEK 9580 24.4 15.8 154 24.0 19.0 126
SYLVAN LAKE 8420 28.3 19.3 147 38.6 27.0 143
SYLVAN ROAD 7120 5.8 2.0 290 28.9 22.1 131
TIMBER CREEK 7950 3.3 1.9 174 12.0 12.8 94
YOUNTS PEAK 8350 23.4 14.3 164 24.1 20.6 117
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Basin wide percent of average 160 123
SHOSHONE RIVER
BLACKWATER 9780 39.0 28.8 135 37.6 27.0 139
EVENING STAR 9200 40.3 31.8 127 46.8 32.4 144
KIRWIN 9550 16.4 10.4 158 20.0 16.1 124
MARQUETTE 8760 9.3 -M * 13.8 16.2 85
SYLVAN LAKE 8420 28.3 19.3 147 38.6 27.0 143
SYLVAN ROAD 7120 5.8 2.0 290 28.9 22.1 131
YOUNTS PEAK 8350 23.4 14.3 164 24.1 20.6 117
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Basin wide percent of average 144 130
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.9 .4 2225* 14.7 12.8 115
BIG GOOSE 7990 11.7 8.4 139 17.5 15.1 116
BONE SPRINGS DIV 9350 27.8 15.5 179 24.8 20.6 120
BURGESS JUNCTION 7880 14.1 8.9 158 18.7 17.3 108
CLOUD PEAK RESERVOIR 9860 20.6 14.2 145 22.9 19.8 116
DOME LAKE 8880 17.6 9.3 189 21.1 19.1 110
GRAVE SPRINGS 8550 10.7 6.2 173 14.3 14.9 96
HANSEN SAWMILL 8360 7.8 1.7 459 14.3 12.7 113
LITTLE GOOSE 8870 14.7 -M * 22.0 -M *
MIDDLE POWDER 7760 14.2 9.6 148 15.5 17.8 87
POWDER RIVER PASS 9480 20.7 7.1 292 26.4 18.0 147
SOLDIER PARK 8720 9.8 -M * 15.0 -M *
SUCKER CREEK 8880 18.6 9.1 204 23.5 19.9 118
TIE CREEK 6870 4.5 1.0 450 16.5 15.7 105
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Basin wide percent of average 194 113
BELLE FOURCHE
BLIND PARK 6890 1.9 .0 * 23.6 16.3 145
COLE CANYON 5910 .0 .4 0* 18.4 11.5 160
NORTH RAPID CREEK 6130 .0 .3 0* 18.5 12.9 143
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Basin wide percent of average 271* 149
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.2 9.3 325 43.3 25.7 168
COLUMBINE 9160 30.9 10.9 283 45.3 31.0 146
DIVIDE PEAK 8880 26.7 11.0 243 38.7 26.2 148
ELK RIVER 8700 21.2 6.0 353 35.0 24.8 141
JOE WRIGHT 10120 49.5 23.1 214 49.9 32.9 152
NORTH FRENCH CREEK 10130 60.5 32.2 188 -M 32.5 *
OLD BATTLE 10000 57.1 34.3 166 62.8 42.6 147
SAGE CREEK BASIN 7850 4.9 6.4 77 24.8 15.2 163
SOUTH BRUSH CREEK 8440 16.4 5.5 298 31.7 22.3 142
TOWER 10500 74.0 50.7 146 -M 48.2 *
WEBBER SPRINGS 9250 34.4 16.0 215 47.9 33.3 144
WILLOW CREEK PASS 9540 24.4 9.9 246 26.4 17.4 152
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Basin wide percent of average 200 150
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 38.5 21.3 181 42.3 29.6 143
CASPER MTN. 7900 9.0 10.2 88 19.9 22.3 89
DEADMAN HILL 10220 30.2 17.2 176 32.4 23.2 140
DEER PARK 9700 20.4 17.1 119 27.2 29.3 93
LAPRELE CREEK 8375 9.1 2.9 314 19.6 18.6 105
RENO HILL 8400 16.4 8.4 195 24.8 23.0 108
ROACH 9700 24.9 12.0 208 32.7 24.8 132
SAND LAKE 10050 49.7 34.5 144 48.9 32.3 151
SOUTH PASS 9040 14.9 12.6 118 17.7 24.8 71
WINDY PEAK 7900 3.9 1.2 325 17.9 15.6 115
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Basin wide percent of average 158 116
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 23.1 20.0 116
DIVIDE PEAK 8880 26.7 11.0 243 38.7 26.2 148
OLD BATTLE 10000 57.1 34.3 166 62.8 42.6 147
SANDSTONE RS 8150 14.1 2.8 504 34.8 23.6 147
WHISKEY PARK 8950 -M 24.8 * 55.1 36.4 151
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Basin wide percent of average 204 144
UPPER GREEN RIVER
BIG SANDY OPENING 9080 16.1 7.8 206 20.9 17.5 119
BLIND BULL SUM 8650 44.8 24.0 187 31.1 26.9 116
EAST RIM DIVIDE 7930 6.9 8.0 86 18.7 15.1 124
ELKHART PARK G.S. 9400 16.0 8.5 188 18.9 17.7 107
GROS VENTRE SUMMIT 8750 19.1 8.9 215 22.5 16.6 136
GUNSIGHT PASS 9820 -M -M * 25.9 -M *
KENDALL R.S. 7740 9.0 2.1 429 22.3 17.7 126
LOOMIS PARK 8240 19.6 8.5 231 29.4 21.4 137
NEW FORK LAKE 8340 8.5 2.7 315 15.6 14.8 105
POCKET CREEK 9360 14.8 -M * 19.7 -M *
SNIDER BASIN 8060 15.7 6.3 249 24.4 19.6 124
SPRING CREEK DIVIDE 9000 42.3 23.3 182 41.8 31.9 131
TRIPLE PEAK 8500 36.2 15.2 238 44.8 30.6 146
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Basin wide percent of average 203 126
LOWER GREEN RIVER
HAMS FORK 7840 5.2 .0 * 19.6 16.1 122
HEWINTA 9519 11.6 3.5 331 25.2 19.3 131
HICKERSON PARK 9145 .0 1.4 0 15.4 11.6 133
HOLE-IN-ROCK 9150 1.6 1.2 133 17.0 11.2 152
INDIAN CREEK 9425 36.2 22.4 162 34.5 31.3 110
KELLEY R.S. 8180 18.5 7.8 237 30.5 25.1 122
STEEL CREEK PARK 10200 26.4 17.4 152 29.4 21.9 134
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Basin wide percent of average 185 126
UPPER BEAR RIVER
BUG LAKE 7950 30.3 9.2 329 37.0 24.0 154
HAYDEN FORK 9212 19.7 6.1 323 39.6 27.1 146
KELLEY R.S. 8180 18.5 7.8 237 30.5 25.1 122
LILY LAKE 9156 22.1 5.3 417 31.0 22.8 136
MONTE CRISTO 8960 45.3 21.1 215 48.0 32.6 147
SALT RIVER SUMMIT 7760 13.9 3.4 409 27.8 23.1 120
TRIAL LAKE 9992 49.9 21.9 228 44.7 31.7 141
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Basin wide percent of average 267 139
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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.