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 MONDAY: MAY 16 , 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 18.0 6.1 295 33.9 25.7 132
COTTONWOOD CREEK 7670 33.5 13.4 250 46.9 34.0 138
GRAND TARGHEE 9260 -M -M * 45.9 -M *
GRANITE CREEK 6770 19.7 7.5 263 33.0 23.6 140
GRASSY LAKE 7265 43.3 25.9 167 55.0 43.0 128
GROS VENTRE SUMMIT 8750 19.2 9.6 200 22.5 16.5 136
GUNSIGHT PASS 9820 -M -M * 25.6 -M *
LEWIS LAKE DIVIDE 7850 53.4 28.4 188 49.2 43.6 113
PHILLIPS BENCH 8200 41.9 23.6 178 45.7 34.9 131
SALT RIVER SUMMIT 7760 14.8 4.4 336 27.8 22.9 121
SNAKE RIVER STATION 6920 -M 5.2 * 35.4 27.0 131
SPRING CREEK DIVIDE 9000 42.9 24.2 177 41.8 31.7 132
THUMB DIVIDE 7980 22.1 9.3 238 28.7 23.5 122
TOGWOTEE PASS 9580 41.4 27.2 152 42.9 30.9 139
TWO OCEAN PLATEAU 9240 52.5 30.5 172 43.0 34.2 126
WILLOW CREEK 8380 45.3 24.7 183 55.1 40.3 137
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Basin wide percent of average 191 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.4 25.4 131 33.4 25.3 132
BLACK BEAR 8170 55.3 36.1 153 58.3 48.2 121
CANYON 7870 17.7 6.8 260 24.9 19.1 130
FISHER CREEK 9100 52.1 36.3 144 52.4 44.3 118
MADISON PLATEAU 7750 34.0 19.1 178 41.3 32.2 128
NORTHEAST ENTRANCE 7350 7.6 2.9 262 21.1 16.1 131
PARKER PEAK 9400 39.5 23.8 166 -M 21.3 *
SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145
THUMB DIVIDE 7980 22.1 9.3 238 28.7 23.5 122
TWO OCEAN PLATEAU 9240 52.5 30.5 172 43.0 34.2 126
WHISKEY CREEK 6800 18.6 9.3 200 30.9 25.7 120
WHITE MILL 8700 36.8 24.4 151 38.1 33.2 115
WOLVERINE 7650 9.7 2.8 346 19.9 16.8 118
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Basin wide percent of average 166 125
WIND RIVER
BURROUGHS CREEK 8750 22.8 10.1 226 26.4 21.0 126
CASTLE CREEK 8400 1.6 -M * 12.5 -M *
COLD SPRINGS 9630 8.5 3.1 274 14.6 15.6 94
DEER PARK 9700 20.6 17.0 121 27.2 29.0 94
HOBBS PARK 10100 18.8 16.4 115 19.1 19.1 100
LITTLE WARM 9370 17.3 7.4 234 20.5 18.5 111
SOUTH PASS 9040 15.3 13.6 113 17.7 24.6 72
ST. LAWRENCE ALT 8620 1.1 3.4 32 13.4 13.8 97
TOGWOTEE PASS 9580 41.4 27.2 152 42.9 30.9 139
TOWNSEND CREEK 8700 4.6 5.4 85 14.9 17.3 86
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Basin wide percent of average 145 104
BIGHORN BASIN
BALD MTN. 9380 33.0 22.8 145 27.8 23.5 118
BEAR TRAP MEADOW 8200 9.3 .6 1550 14.5 12.6 115
BLACKWATER 9780 39.2 28.8 136 37.6 26.8 140
BONE SPRINGS DIV 9350 27.6 16.0 173 24.4 20.4 120
EVENING STAR 9200 41.5 32.2 129 46.8 32.1 146
GRAVE SPRINGS 8550 10.6 7.3 145 13.8 14.7 94
KIRWIN 9550 16.7 10.8 155 20.0 15.9 126
MARQUETTE 8760 9.0 -M * 13.3 15.9 84
MIDDLE POWDER 7760 14.3 10.6 135 15.3 17.6 87
OWL CREEK 8975 3.4 2.1 162 10.7 9.6 111
POWDER RIVER PASS 9480 20.6 7.8 264 26.0 17.8 146
SHELL CREEK 9580 24.4 16.1 152 23.7 18.8 126
SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145
SYLVAN ROAD 7120 7.6 2.5 304 28.9 21.9 132
TIMBER CREEK 7950 3.6 2.1 171 11.5 12.5 92
YOUNTS PEAK 8350 24.0 15.0 160 24.1 20.4 118
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Basin wide percent of average 157 123
SHOSHONE RIVER
BLACKWATER 9780 39.2 28.8 136 37.6 26.8 140
EVENING STAR 9200 41.5 32.2 129 46.8 32.1 146
KIRWIN 9550 16.7 10.8 155 20.0 15.9 126
MARQUETTE 8760 9.0 -M * 13.3 15.9 84
SYLVAN LAKE 8420 29.2 20.0 146 38.7 26.7 145
SYLVAN ROAD 7120 7.6 2.5 304 28.9 21.9 132
YOUNTS PEAK 8350 24.0 15.0 160 24.1 20.4 118
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Basin wide percent of average 145 131
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.3 .6 1550 14.5 12.6 115
BIG GOOSE 7990 11.8 8.9 133 17.0 14.9 114
BONE SPRINGS DIV 9350 27.6 16.0 173 24.4 20.4 120
BURGESS JUNCTION 7880 14.5 9.7 149 18.4 17.1 108
CLOUD PEAK RESERVOIR 9860 21.0 14.6 144 22.6 19.5 116
DOME LAKE 8880 17.8 10.0 178 20.8 18.9 110
GRAVE SPRINGS 8550 10.6 7.3 145 13.8 14.7 94
HANSEN SAWMILL 8360 8.5 1.9 447 14.1 12.5 113
LITTLE GOOSE 8870 14.8 -M * 21.5 -M *
MIDDLE POWDER 7760 14.3 10.6 135 15.3 17.6 87
POWDER RIVER PASS 9480 20.6 7.8 264 26.0 17.8 146
SOLDIER PARK 8720 10.3 -M * 14.6 -M *
SUCKER CREEK 8880 18.4 9.8 188 23.0 19.7 117
TIE CREEK 6870 5.4 1.2 450 16.0 15.5 103
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Basin wide percent of average 183 112
BELLE FOURCHE
BLIND PARK 6890 3.7 .0 * 22.9 16.0 143
COLE CANYON 5910 2.7 .7 386* 18.1 11.3 160
NORTH RAPID CREEK 6130 .0 .5 0* 17.9 12.8 140
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Basin wide percent of average 533* 147
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.1 10.4 299 43.1 25.5 169
COLUMBINE 9160 32.5 12.4 262 45.3 30.8 147
DIVIDE PEAK 8880 28.5 12.2 234 38.3 26.0 147
ELK RIVER 8700 22.6 7.0 323 35.0 24.6 142
JOE WRIGHT 10120 49.9 23.6 211 49.9 32.6 153
NORTH FRENCH CREEK 10130 61.4 32.9 187 61.6 32.2 191
OLD BATTLE 10000 57.4 35.1 164 62.4 42.3 148
SAGE CREEK BASIN 7850 6.2 7.1 87 24.3 15.1 161
SOUTH BRUSH CREEK 8440 17.6 6.2 284 31.6 22.0 144
TOWER 10500 74.0 51.3 144 68.5 47.9 143
WEBBER SPRINGS 9250 35.6 17.4 205 47.7 33.1 144
WILLOW CREEK PASS 9540 25.6 10.8 237 26.4 17.2 153
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Basin wide percent of average 195 153
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 39.9 22.5 177 42.3 29.3 144
CASPER MTN. 7900 10.3 11.2 92 19.9 22.0 90
DEADMAN HILL 10220 30.6 17.8 172 32.3 23.0 140
DEER PARK 9700 20.6 17.0 121 27.2 29.0 94
LAPRELE CREEK 8375 10.1 3.4 297 19.5 18.4 106
RENO HILL 8400 17.3 9.2 188 24.7 22.7 109
ROACH 9700 26.4 13.0 203 32.7 24.5 133
SAND LAKE 10050 50.1 35.2 142 48.7 32.0 152
SOUTH PASS 9040 15.3 13.6 113 17.7 24.6 72
WINDY PEAK 7900 5.2 1.5 347 17.9 15.3 117
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Basin wide percent of average 156 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .3 * 22.4 19.9 113
DIVIDE PEAK 8880 28.5 12.2 234 38.3 26.0 147
OLD BATTLE 10000 57.4 35.1 164 62.4 42.3 148
SANDSTONE RS 8150 15.3 3.4 450 34.2 23.5 146
WHISKEY PARK 8950 -M 26.0 * 54.9 36.1 152
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Basin wide percent of average 200 144
UPPER GREEN RIVER
BIG SANDY OPENING 9080 16.5 8.6 192 20.6 17.3 119
BLIND BULL SUM 8650 44.1 24.6 179 31.2 26.7 117
EAST RIM DIVIDE 7930 7.4 8.8 84 18.7 15.0 125
ELKHART PARK G.S. 9400 16.3 9.1 179 18.7 17.5 107
GROS VENTRE SUMMIT 8750 19.2 9.6 200 22.5 16.5 136
GUNSIGHT PASS 9820 -M -M * 25.6 -M *
KENDALL R.S. 7740 9.5 3.2 297 22.1 17.6 126
LOOMIS PARK 8240 20.4 9.3 219 29.4 21.2 139
NEW FORK LAKE 8340 8.9 3.5 254 15.7 14.6 108
POCKET CREEK 9360 14.6 -M * 19.5 -M *
SNIDER BASIN 8060 16.7 7.2 232 24.5 19.5 126
SPRING CREEK DIVIDE 9000 42.9 24.2 177 41.8 31.7 132
TRIPLE PEAK 8500 37.3 16.5 226 44.8 30.4 147
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Basin wide percent of average 192 127
LOWER GREEN RIVER
HAMS FORK 7840 5.8 .7 829* 19.8 15.9 125
HEWINTA 9519 11.7 4.1 285 24.7 19.1 129
HICKERSON PARK 9145 .0 1.9 0 14.7 11.4 129
HOLE-IN-ROCK 9150 2.4 1.5 160 16.5 11.0 150
INDIAN CREEK 9425 37.5 23.3 161 34.6 31.1 111
KELLEY R.S. 8180 19.1 8.7 220 30.5 24.9 122
STEEL CREEK PARK 10200 26.3 17.9 147 28.8 21.7 133
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Basin wide percent of average 177 126
UPPER BEAR RIVER
BUG LAKE 7950 31.6 10.3 307 36.9 23.8 155
HAYDEN FORK 9212 20.3 6.9 294 39.2 26.9 146
KELLEY R.S. 8180 19.1 8.7 220 30.5 24.9 122
LILY LAKE 9156 22.0 6.0 367 30.4 22.7 134
MONTE CRISTO 8960 46.4 22.1 210 47.8 32.3 148
SALT RIVER SUMMIT 7760 14.8 4.4 336 27.8 22.9 121
TRIAL LAKE 9992 49.8 22.8 218 44.1 31.5 140
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Basin wide percent of average 251 139
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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.