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 SATURDAY: MAY 7 , 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 23.5 10.0 235 31.0 24.9 124
COTTONWOOD CREEK 7670 36.0 17.5 206 45.4 32.8 138
GRAND TARGHEE 9260 62.8 -M * 46.1 -M *
GRANITE CREEK 6770 24.1 10.8 223 29.9 22.9 131
GRASSY LAKE 7265 47.9 30.8 156 51.7 41.8 124
GROS VENTRE SUMMIT 8750 18.2 12.1 150 19.4 15.7 124
GUNSIGHT PASS 9820 24.0 -M * 22.1 -M *
LEWIS LAKE DIVIDE 7850 55.2 32.6 169 46.4 42.4 109
PHILLIPS BENCH 8200 41.7 27.6 151 42.0 33.8 124
SALT RIVER SUMMIT 7760 19.6 8.4 233 26.9 22.1 122
SNAKE RIVER STATION 6920 -M 9.6 * 33.2 26.1 127
SPRING CREEK DIVIDE 9000 44.2 27.4 161 40.5 30.8 131
THUMB DIVIDE 7980 27.9 12.9 216 27.0 22.6 119
TOGWOTEE PASS 9580 37.9 28.1 135 39.6 29.8 133
TWO OCEAN PLATEAU 9240 -M 31.6 * -M 33.0 *
WILLOW CREEK 8380 48.6 28.8 169 52.9 38.8 136
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Basin wide percent of average 172 126
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.4 25.9 129 32.2 24.3 133
BLACK BEAR 8170 -M 38.8 * 55.8 46.8 119
CANYON 7870 20.6 9.5 217 23.6 18.2 130
FISHER CREEK 9100 51.3 37.7 136 50.2 42.9 117
MADISON PLATEAU 7750 37.2 22.4 166 39.8 31.1 128
NORTHEAST ENTRANCE 7350 14.6 5.6 261 19.7 15.3 129
PARKER PEAK 9400 38.3 24.5 156 -M 20.2 *
SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144
THUMB DIVIDE 7980 27.9 12.9 216 27.0 22.6 119
TWO OCEAN PLATEAU 9240 -M 31.6 * -M 33.0 *
WHISKEY CREEK 6800 23.8 13.1 182 29.2 24.8 118
WHITE MILL 8700 36.0 26.0 138 35.9 32.0 112
WOLVERINE 7650 15.8 5.7 277 18.8 15.8 119
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Basin wide percent of average 161 123
WIND RIVER
BURROUGHS CREEK 8750 20.3 12.0 169 21.8 20.0 109
CASTLE CREEK 8400 4.2 -M * 10.7 -M *
COLD SPRINGS 9630 7.3 4.6 159 11.8 14.6 81
DEER PARK 9700 22.0 16.8 131 26.4 27.7 95
HOBBS PARK 10100 18.8 17.5 107 17.4 17.8 98
LITTLE WARM 9370 14.6 9.6 152 16.7 17.5 95
SOUTH PASS 9040 18.6 16.6 112 17.4 23.5 74
ST. LAWRENCE ALT 8620 1.2 5.2 23 9.9 12.8 77
TOGWOTEE PASS 9580 37.9 28.1 135 39.6 29.8 133
TOWNSEND CREEK 8700 8.4 7.6 111 13.8 16.3 85
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Basin wide percent of average 126 97
BIGHORN BASIN
BALD MTN. 9380 32.4 23.5 138 26.3 22.2 118
BEAR TRAP MEADOW 8200 10.6 1.7 624 12.7 11.6 109
BLACKWATER 9780 37.0 28.7 129 35.0 25.5 137
BONE SPRINGS DIV 9350 28.2 17.5 161 22.9 19.2 119
EVENING STAR 9200 41.4 33.3 124 44.5 30.8 144
GRAVE SPRINGS 8550 12.1 9.8 123 12.8 13.9 92
KIRWIN 9550 16.3 12.5 130 17.8 14.9 119
MARQUETTE 8760 7.4 -M * 10.4 14.6 71
MIDDLE POWDER 7760 14.7 13.1 112 14.6 16.5 88
OWL CREEK 8975 5.4 3.4 159 9.2 8.8 105
POWDER RIVER PASS 9480 20.6 9.5 217 24.2 16.6 146
SHELL CREEK 9580 24.3 16.8 145 22.1 17.6 126
SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144
SYLVAN ROAD 7120 13.2 6.0 220 27.0 21.1 128
TIMBER CREEK 7950 4.4 3.9 113 8.2 11.3 73
YOUNTS PEAK 8350 23.5 17.5 134 20.9 19.4 108
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Basin wide percent of average 144 119
SHOSHONE RIVER
BLACKWATER 9780 37.0 28.7 129 35.0 25.5 137
EVENING STAR 9200 41.4 33.3 124 44.5 30.8 144
KIRWIN 9550 16.3 12.5 130 17.8 14.9 119
MARQUETTE 8760 7.4 -M * 10.4 14.6 71
SYLVAN LAKE 8420 32.7 22.6 145 36.8 25.5 144
SYLVAN ROAD 7120 13.2 6.0 220 27.0 21.1 128
YOUNTS PEAK 8350 23.5 17.5 134 20.9 19.4 108
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Basin wide percent of average 136 127
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.6 1.7 624 12.7 11.6 109
BIG GOOSE 7990 13.0 10.6 123 15.6 13.8 113
BONE SPRINGS DIV 9350 28.2 17.5 161 22.9 19.2 119
BURGESS JUNCTION 7880 15.9 12.2 130 17.0 16.1 106
CLOUD PEAK RESERVOIR 9860 22.2 15.7 141 21.2 18.1 117
DOME LAKE 8880 19.5 12.1 161 19.3 17.7 109
GRAVE SPRINGS 8550 12.1 9.8 123 12.8 13.9 92
HANSEN SAWMILL 8360 10.1 3.9 259 12.1 11.6 104
LITTLE GOOSE 8870 15.5 -M * 20.0 -M *
MIDDLE POWDER 7760 14.7 13.1 112 14.6 16.5 88
POWDER RIVER PASS 9480 20.6 9.5 217 24.2 16.6 146
SOLDIER PARK 8720 11.6 -M * 13.2 -M *
SUCKER CREEK 8880 19.1 11.8 162 21.3 18.4 116
TIE CREEK 6870 8.1 2.8 289 14.8 14.3 103
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Basin wide percent of average 161 111
BELLE FOURCHE
BLIND PARK 6890 9.2 2.7 341 21.8 14.9 146
COLE CANYON 5910 7.8 2.5 312 16.7 10.3 162
NORTH RAPID CREEK 6130 3.9 1.9 205 17.3 12.0 144
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Basin wide percent of average 294 150
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.4 14.5 217 42.6 24.4 175
COLUMBINE 9160 39.6 18.1 219 44.6 29.9 149
DIVIDE PEAK 8880 32.6 17.0 192 37.2 25.0 149
ELK RIVER 8700 29.2 12.0 243 34.4 23.7 145
JOE WRIGHT 10120 49.0 25.0 196 48.5 31.1 156
NORTH FRENCH CREEK 10130 63.9 34.4 186 59.8 30.8 194
OLD BATTLE 10000 57.6 37.2 155 47.5 40.9 116
SAGE CREEK BASIN 7850 15.0 9.9 152 24.2 14.5 167
SOUTH BRUSH CREEK 8440 24.1 9.3 259 30.9 20.9 148
TOWER 10500 73.6 52.4 140 -M 46.4 *
WEBBER SPRINGS 9250 40.1 22.8 176 46.6 32.0 146
WILLOW CREEK PASS 9540 27.0 13.5 200 25.1 16.3 154
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Basin wide percent of average 182 152
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.4 26.9 158 41.6 28.0 149
CASPER MTN. 7900 13.3 15.3 87 18.8 20.6 91
DEADMAN HILL 10220 31.7 19.5 163 31.1 21.8 143
DEER PARK 9700 22.0 16.8 131 26.4 27.7 95
LAPRELE CREEK 8375 13.5 5.6 241 18.3 17.3 106
RENO HILL 8400 18.4 12.9 143 22.9 21.3 108
ROACH 9700 28.5 16.9 169 31.6 23.3 136
SAND LAKE 10050 50.4 36.9 137 43.8 30.5 144
SOUTH PASS 9040 18.6 16.6 112 17.4 23.5 74
WINDY PEAK 7900 8.6 3.5 246 17.1 14.2 120
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Basin wide percent of average 145 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 2.9 * 22.3 19.1 117
DIVIDE PEAK 8880 32.6 17.0 192 37.2 25.0 149
OLD BATTLE 10000 57.6 37.2 155 47.5 40.9 116
SANDSTONE RS 8150 22.4 7.0 320 34.0 22.6 150
WHISKEY PARK 8950 -M 29.5 * 54.0 34.9 155
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Basin wide percent of average 184 137
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.8 11.9 150 19.9 16.5 121
BLIND BULL SUM 8650 44.3 26.9 165 29.0 25.8 112
EAST RIM DIVIDE 7930 14.3 11.8 121 16.9 14.3 118
ELKHART PARK G.S. 9400 17.4 11.6 150 17.6 16.6 106
GROS VENTRE SUMMIT 8750 18.2 12.1 150 19.4 15.7 124
GUNSIGHT PASS 9820 24.0 -M * 22.1 -M *
KENDALL R.S. 7740 12.7 7.6 167 19.7 17.0 116
LOOMIS PARK 8240 23.6 12.5 189 26.8 20.5 131
NEW FORK LAKE 8340 13.3 6.6 202 14.3 13.9 103
POCKET CREEK 9360 16.9 -M * 18.7 -M *
SNIDER BASIN 8060 21.9 10.8 203 23.3 18.9 123
SPRING CREEK DIVIDE 9000 44.2 27.4 161 40.5 30.8 131
TRIPLE PEAK 8500 41.3 21.4 193 43.0 29.4 146
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Basin wide percent of average 167 123
LOWER GREEN RIVER
HAMS FORK 7840 14.2 4.0 355 19.2 15.3 125
HEWINTA 9519 16.6 7.3 227 23.5 18.4 128
HICKERSON PARK 9145 2.4 4.1 59 13.3 10.7 124
HOLE-IN-ROCK 9150 7.9 3.4 232 15.0 10.2 147
INDIAN CREEK 9425 40.2 26.7 151 33.8 30.1 112
KELLEY R.S. 8180 24.2 12.2 198 29.9 24.1 124
STEEL CREEK PARK 10200 25.4 18.9 134 27.3 20.9 131
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Basin wide percent of average 171 125
UPPER BEAR RIVER
BUG LAKE 7950 36.3 15.2 239 36.4 23.0 158
HAYDEN FORK 9212 28.5 10.7 266 38.1 25.9 147
KELLEY R.S. 8180 24.2 12.2 198 29.9 24.1 124
LILY LAKE 9156 26.8 9.2 291 29.1 21.8 133
MONTE CRISTO 8960 49.9 26.3 190 47.0 31.2 151
SALT RIVER SUMMIT 7760 19.6 8.4 233 26.9 22.1 122
TRIAL LAKE 9992 -M 25.7 * 42.7 30.3 141
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Basin wide percent of average 226 140
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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.