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 17 , 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 17.5 5.6 313 34.0 25.8 132
COTTONWOOD CREEK 7670 33.4 13.0 257 46.9 34.1 138
GRAND TARGHEE 9260 69.9 -M * -M -M *
GRANITE CREEK 6770 19.3 7.1 272 33.1 23.7 140
GRASSY LAKE 7265 41.8 25.3 165 55.0 43.1 128
GROS VENTRE SUMMIT 8750 19.0 9.2 207 22.5 16.5 136
GUNSIGHT PASS 9820 -M -M * 25.8 -M *
LEWIS LAKE DIVIDE 7850 52.4 27.9 188 49.2 43.7 113
PHILLIPS BENCH 8200 41.2 23.1 178 45.7 35.0 131
SALT RIVER SUMMIT 7760 14.4 3.9 369 27.8 23.0 121
SNAKE RIVER STATION 6920 -M 4.7 * 35.4 27.1 131
SPRING CREEK DIVIDE 9000 42.6 23.8 179 41.8 31.8 131
THUMB DIVIDE 7980 21.4 8.8 243 28.6 23.6 121
TOGWOTEE PASS 9580 41.4 27.0 153 43.0 31.0 139
TWO OCEAN PLATEAU 9240 52.3 30.3 173 43.0 34.4 125
WILLOW CREEK 8380 44.1 24.2 182 55.2 40.5 136
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Basin wide percent of average 192 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.1 25.2 131 33.4 25.4 131
BLACK BEAR 8170 53.3 35.8 149 58.3 48.3 121
CANYON 7870 17.3 6.3 275 24.9 19.2 130
FISHER CREEK 9100 51.6 36.0 143 52.4 44.4 118
MADISON PLATEAU 7750 33.4 18.6 180 41.3 32.4 127
NORTHEAST ENTRANCE 7350 7.1 2.6 273 21.1 16.2 130
PARKER PEAK 9400 38.9 23.7 164 34.9 21.5 162
SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144
THUMB DIVIDE 7980 21.4 8.8 243 28.6 23.6 121
TWO OCEAN PLATEAU 9240 52.3 30.3 173 43.0 34.4 125
WHISKEY CREEK 6800 18.2 8.7 209 30.9 25.8 120
WHITE MILL 8700 36.5 24.2 151 38.1 33.3 114
WOLVERINE 7650 9.0 2.4 375 19.9 16.9 118
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Basin wide percent of average 166 126
WIND RIVER
BURROUGHS CREEK 8750 22.5 9.9 227 26.4 21.1 125
CASTLE CREEK 8400 1.2 -M * 12.6 -M *
COLD SPRINGS 9630 8.1 2.9 279 14.6 15.7 93
DEER PARK 9700 20.4 16.7 122 27.2 29.1 93
HOBBS PARK 10100 18.6 16.3 114 19.1 19.2 99
LITTLE WARM 9370 17.1 7.1 241 20.6 18.6 111
SOUTH PASS 9040 15.0 13.0 115 17.7 24.7 72
ST. LAWRENCE ALT 8620 .0 3.1 0 13.4 13.9 96
TOGWOTEE PASS 9580 41.4 27.0 153 43.0 31.0 139
TOWNSEND CREEK 8700 3.9 5.2 75 14.8 17.4 85
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Basin wide percent of average 145 103
BIGHORN BASIN
BALD MTN. 9380 32.7 22.7 144 27.8 23.6 118
BEAR TRAP MEADOW 8200 8.8 .4 2200* 14.5 12.7 114
BLACKWATER 9780 39.1 28.7 136 37.5 26.9 139
BONE SPRINGS DIV 9350 27.2 15.7 173 24.4 20.5 119
EVENING STAR 9200 41.0 32.0 128 46.8 32.3 145
GRAVE SPRINGS 8550 10.2 6.7 152 13.9 14.8 94
KIRWIN 9550 16.4 10.6 155 20.0 16.0 125
MARQUETTE 8760 8.9 -M * 13.3 16.0 83
MIDDLE POWDER 7760 14.0 10.1 139 15.3 17.7 86
OWL CREEK 8975 2.8 2.0 140 10.7 9.7 110
POWDER RIVER PASS 9480 20.3 7.4 274 26.0 17.9 145
SHELL CREEK 9580 24.0 16.0 150 23.7 18.9 125
SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144
SYLVAN ROAD 7120 6.9 2.3 300 28.9 22.0 131
TIMBER CREEK 7950 3.0 2.0 150 11.5 12.6 91
YOUNTS PEAK 8350 23.7 14.6 162 24.1 20.5 118
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Basin wide percent of average 157 122
SHOSHONE RIVER
BLACKWATER 9780 39.1 28.7 136 37.5 26.9 139
EVENING STAR 9200 41.0 32.0 128 46.8 32.3 145
KIRWIN 9550 16.4 10.6 155 20.0 16.0 125
MARQUETTE 8760 8.9 -M * 13.3 16.0 83
SYLVAN LAKE 8420 29.0 19.6 148 38.7 26.9 144
SYLVAN ROAD 7120 6.9 2.3 300 28.9 22.0 131
YOUNTS PEAK 8350 23.7 14.6 162 24.1 20.5 118
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Basin wide percent of average 145 130
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.8 .4 2200* 14.5 12.7 114
BIG GOOSE 7990 11.3 8.7 130 17.0 15.0 113
BONE SPRINGS DIV 9350 27.2 15.7 173 24.4 20.5 119
BURGESS JUNCTION 7880 13.9 9.3 149 18.4 17.2 107
CLOUD PEAK RESERVOIR 9860 19.8 14.3 138 22.6 19.7 115
DOME LAKE 8880 17.1 9.6 178 20.8 19.0 109
GRAVE SPRINGS 8550 10.2 6.7 152 13.9 14.8 94
HANSEN SAWMILL 8360 7.8 1.8 433 14.0 12.6 111
LITTLE GOOSE 8870 14.2 -M * 21.5 -M *
MIDDLE POWDER 7760 14.0 10.1 139 15.3 17.7 86
POWDER RIVER PASS 9480 20.3 7.4 274 26.0 17.9 145
SOLDIER PARK 8720 9.5 -M * 14.6 -M *
SUCKER CREEK 8880 18.0 9.4 191 23.0 19.8 116
TIE CREEK 6870 4.6 1.2 383 16.0 15.6 103
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Basin wide percent of average 183 112
BELLE FOURCHE
BLIND PARK 6890 2.6 .0 * 23.0 16.2 142
COLE CANYON 5910 1.5 .5 300* 18.3 11.4 161
NORTH RAPID CREEK 6130 .0 .4 0* 18.0 12.9 140
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Basin wide percent of average 456* 146
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.5 9.9 308 43.1 25.6 168
COLUMBINE 9160 31.7 11.7 271 45.4 30.9 147
DIVIDE PEAK 8880 27.1 11.6 234 38.2 26.1 146
ELK RIVER 8700 21.3 6.5 328 35.0 24.7 142
JOE WRIGHT 10120 49.7 23.4 212 49.9 32.8 152
NORTH FRENCH CREEK 10130 60.6 32.6 186 61.6 32.3 191
OLD BATTLE 10000 57.1 34.7 165 62.5 42.4 147
SAGE CREEK BASIN 7850 5.0 6.7 75 24.3 15.1 161
SOUTH BRUSH CREEK 8440 16.7 5.8 288 31.6 22.1 143
TOWER 10500 73.9 51.0 145 -M 48.0 *
WEBBER SPRINGS 9250 35.0 16.7 210 47.6 33.2 143
WILLOW CREEK PASS 9540 25.0 10.4 240 26.4 17.3 153
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Basin wide percent of average 196 154
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 39.3 21.9 179 42.3 29.4 144
CASPER MTN. 7900 9.5 10.7 89 19.8 22.1 90
DEADMAN HILL 10220 30.4 17.5 174 32.3 23.1 140
DEER PARK 9700 20.4 16.7 122 27.2 29.1 93
LAPRELE CREEK 8375 9.4 3.1 303 19.5 18.5 105
RENO HILL 8400 16.7 8.8 190 24.9 22.8 109
ROACH 9700 25.4 12.5 203 32.7 24.6 133
SAND LAKE 10050 49.7 34.9 142 48.8 32.2 152
SOUTH PASS 9040 15.0 13.0 115 17.7 24.7 72
WINDY PEAK 7900 4.4 1.4 314 17.8 15.4 116
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Basin wide percent of average 157 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 22.4 19.9 113
DIVIDE PEAK 8880 27.1 11.6 234 38.2 26.1 146
OLD BATTLE 10000 57.1 34.7 165 62.5 42.4 147
SANDSTONE RS 8150 13.3 3.1 429 34.2 23.6 145
WHISKEY PARK 8950 -M 25.4 * 54.9 36.2 152
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Basin wide percent of average 197 143
UPPER GREEN RIVER
BIG SANDY OPENING 9080 16.2 8.2 198 20.7 17.4 119
BLIND BULL SUM 8650 44.0 24.3 181 31.1 26.8 116
EAST RIM DIVIDE 7930 7.1 8.4 85 18.7 15.0 125
ELKHART PARK G.S. 9400 16.0 8.8 182 18.8 17.6 107
GROS VENTRE SUMMIT 8750 19.0 9.2 207 22.5 16.5 136
GUNSIGHT PASS 9820 -M -M * 25.8 -M *
KENDALL R.S. 7740 9.1 2.7 337 22.3 17.7 126
LOOMIS PARK 8240 19.8 8.9 222 29.4 21.3 138
NEW FORK LAKE 8340 8.4 3.1 271 15.6 14.7 106
POCKET CREEK 9360 14.7 -M * 19.6 -M *
SNIDER BASIN 8060 16.1 6.8 237 24.5 19.6 125
SPRING CREEK DIVIDE 9000 42.6 23.8 179 41.8 31.8 131
TRIPLE PEAK 8500 36.6 15.8 232 44.9 30.5 147
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Basin wide percent of average 196 127
LOWER GREEN RIVER
HAMS FORK 7840 5.5 .4 1375* 19.5 16.0 122
HEWINTA 9519 11.2 3.8 295 24.9 19.2 130
HICKERSON PARK 9145 .3 1.6 19 15.1 11.5 131
HOLE-IN-ROCK 9150 1.2 1.4 86 16.7 11.1 150
INDIAN CREEK 9425 36.5 22.9 159 34.6 31.2 111
KELLEY R.S. 8180 18.7 8.2 228 30.5 25.0 122
STEEL CREEK PARK 10200 26.1 17.6 148 29.1 21.8 133
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Basin wide percent of average 178 125
UPPER BEAR RIVER
BUG LAKE 7950 30.5 9.7 314 36.9 23.9 154
HAYDEN FORK 9212 19.8 6.5 305 39.4 27.0 146
KELLEY R.S. 8180 18.7 8.2 228 30.5 25.0 122
LILY LAKE 9156 21.8 5.6 389 30.7 22.8 135
MONTE CRISTO 8960 45.5 21.6 211 47.9 32.5 147
SALT RIVER SUMMIT 7760 14.4 3.9 369 27.8 23.0 121
TRIAL LAKE 9992 -M 22.4 * 44.3 31.6 140
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Basin wide percent of average 272 139
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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.