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 3 , 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 25.6 11.5 223 31.0 24.5 127
COTTONWOOD CREEK 7670 36.7 19.0 193 45.3 32.2 141
GRAND TARGHEE 9260 62.6 -M * 45.9 -M *
GRANITE CREEK 6770 25.5 12.2 209 29.8 22.6 132
GRASSY LAKE 7265 49.5 32.6 152 51.6 41.2 125
GROS VENTRE SUMMIT 8750 18.4 12.9 143 19.2 15.4 125
GUNSIGHT PASS 9820 23.9 -M * 22.0 -M *
LEWIS LAKE DIVIDE 7850 55.4 34.0 163 46.1 41.9 110
PHILLIPS BENCH 8200 40.5 28.9 140 41.8 33.4 125
SALT RIVER SUMMIT 7760 21.0 9.9 212 26.9 21.8 123
SNAKE RIVER STATION 6920 -M 11.4 * 33.1 25.7 129
SPRING CREEK DIVIDE 9000 44.5 28.3 157 40.4 30.4 133
THUMB DIVIDE 7980 29.1 14.3 203 27.0 22.2 122
TOGWOTEE PASS 9580 37.9 28.0 135 39.4 29.2 135
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.4 *
WILLOW CREEK 8380 49.4 30.1 164 52.7 38.0 139
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Basin wide percent of average 166 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.5 26.0 129 32.1 23.8 135
BLACK BEAR 8170 57.6 39.5 146 55.7 46.2 121
CANYON 7870 21.4 10.7 200 23.6 17.9 132
FISHER CREEK 9100 51.4 37.7 136 48.7 42.2 115
MADISON PLATEAU 7750 38.0 23.7 160 39.7 30.6 130
NORTHEAST ENTRANCE 7350 17.0 6.3 270 19.7 15.0 131
PARKER PEAK 9400 38.3 24.6 156 32.5 19.7 165
SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147
THUMB DIVIDE 7980 29.1 14.3 203 27.0 22.2 122
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.4 *
WHISKEY CREEK 6800 24.6 14.5 170 29.3 24.4 120
WHITE MILL 8700 36.0 26.3 137 35.8 31.5 114
WOLVERINE 7650 17.2 6.6 261 18.6 15.4 121
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Basin wide percent of average 157 127
WIND RIVER
BURROUGHS CREEK 8750 20.7 13.2 157 21.8 19.5 112
CASTLE CREEK 8400 6.4 -M * 10.6 -M *
COLD SPRINGS 9630 9.3 4.7 198 11.8 14.1 84
DEER PARK 9700 22.3 18.1 123 26.3 27.2 97
HOBBS PARK 10100 19.3 18.0 107 17.4 17.2 101
LITTLE WARM 9370 15.3 10.5 146 16.6 17.0 98
SOUTH PASS 9040 19.7 17.7 111 17.3 23.0 75
ST. LAWRENCE ALT 8620 3.7 5.8 64 9.9 12.3 80
TOGWOTEE PASS 9580 37.9 28.0 135 39.4 29.2 135
TOWNSEND CREEK 8700 9.2 8.6 107 13.8 15.8 87
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Basin wide percent of average 126 99
BIGHORN BASIN
BALD MTN. 9380 32.5 23.5 138 26.3 21.6 122
BEAR TRAP MEADOW 8200 11.5 2.1 548 12.7 11.1 114
BLACKWATER 9780 36.8 29.0 127 34.8 25.0 139
BONE SPRINGS DIV 9350 28.3 18.2 155 22.8 18.6 123
EVENING STAR 9200 41.8 33.3 126 43.4 30.2 144
GRAVE SPRINGS 8550 12.3 10.8 114 12.8 13.4 96
KIRWIN 9550 17.0 12.9 132 17.7 14.4 123
MARQUETTE 8760 7.4 -M * 10.4 14.0 74
MIDDLE POWDER 7760 14.9 14.0 106 14.6 16.0 91
OWL CREEK 8975 7.3 3.8 192 9.1 8.4 108
POWDER RIVER PASS 9480 20.8 10.2 204 24.2 16.1 150
SHELL CREEK 9580 24.6 16.7 147 22.1 17.1 129
SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147
SYLVAN ROAD 7120 17.0 7.6 224 27.0 20.7 130
TIMBER CREEK 7950 6.2 4.7 132 8.2 10.8 76
YOUNTS PEAK 8350 23.7 18.1 131 21.0 19.0 111
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Basin wide percent of average 144 122
SHOSHONE RIVER
BLACKWATER 9780 36.8 29.0 127 34.8 25.0 139
EVENING STAR 9200 41.8 33.3 126 43.4 30.2 144
KIRWIN 9550 17.0 12.9 132 17.7 14.4 123
MARQUETTE 8760 7.4 -M * 10.4 14.0 74
SYLVAN LAKE 8420 33.1 23.4 141 36.7 25.0 147
SYLVAN ROAD 7120 17.0 7.6 224 27.0 20.7 130
YOUNTS PEAK 8350 23.7 18.1 131 21.0 19.0 111
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Basin wide percent of average 136 129
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.5 2.1 548 12.7 11.1 114
BIG GOOSE 7990 13.4 11.3 119 15.5 13.2 117
BONE SPRINGS DIV 9350 28.3 18.2 155 22.8 18.6 123
BURGESS JUNCTION 7880 16.2 13.0 125 16.9 15.6 108
CLOUD PEAK RESERVOIR 9860 22.4 16.2 138 21.0 17.4 121
DOME LAKE 8880 19.7 13.1 150 19.2 17.1 112
GRAVE SPRINGS 8550 12.3 10.8 114 12.8 13.4 96
HANSEN SAWMILL 8360 10.7 4.6 233 12.1 11.2 108
LITTLE GOOSE 8870 15.8 -M * 20.0 -M *
MIDDLE POWDER 7760 14.9 14.0 106 14.6 16.0 91
POWDER RIVER PASS 9480 20.8 10.2 204 24.2 16.1 150
SOLDIER PARK 8720 11.9 -M * 13.1 -M *
SUCKER CREEK 8880 19.2 12.7 151 21.3 17.7 120
TIE CREEK 6870 9.1 3.8 239 14.8 13.8 107
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Basin wide percent of average 153 115
BELLE FOURCHE
BLIND PARK 6890 11.3 3.9 290 21.7 14.4 151
COLE CANYON 5910 9.3 4.1 227 16.6 9.8 169
NORTH RAPID CREEK 6130 6.4 3.1 206 17.2 11.6 148
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Basin wide percent of average 243 155
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.4 15.6 195 36.9 23.9 154
COLUMBINE 9160 40.0 20.0 200 44.3 29.4 151
DIVIDE PEAK 8880 31.9 18.6 172 36.7 24.5 150
ELK RIVER 8700 30.5 14.0 218 34.1 23.3 146
JOE WRIGHT 10120 48.5 25.1 193 48.4 30.4 159
NORTH FRENCH CREEK 10130 62.8 34.5 182 -M 30.0 *
OLD BATTLE 10000 57.2 37.1 154 47.3 40.2 118
SAGE CREEK BASIN 7850 18.7 10.8 173 24.0 14.2 169
SOUTH BRUSH CREEK 8440 25.1 10.5 239 30.5 20.4 150
TOWER 10500 72.7 52.4 139 -M 45.6 *
WEBBER SPRINGS 9250 39.5 24.5 161 46.1 31.4 147
WILLOW CREEK PASS 9540 27.1 14.0 194 25.0 15.9 157
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Basin wide percent of average 175 147
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.1 28.0 150 38.0 27.3 139
CASPER MTN. 7900 13.7 16.6 83 18.5 19.9 93
DEADMAN HILL 10220 31.4 19.7 159 30.6 21.2 144
DEER PARK 9700 22.3 18.1 123 26.3 27.2 97
LAPRELE CREEK 8375 15.7 6.6 238 18.1 16.7 108
RENO HILL 8400 19.0 14.2 134 22.4 20.6 109
ROACH 9700 28.2 18.1 156 31.3 22.7 138
SAND LAKE 10050 49.7 37.0 134 43.8 29.7 147
SOUTH PASS 9040 19.7 17.7 111 17.3 23.0 75
WINDY PEAK 7900 9.7 4.5 216 16.7 13.8 121
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Basin wide percent of average 139 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 4.0 * 21.7 18.8 115
DIVIDE PEAK 8880 31.9 18.6 172 36.7 24.5 150
OLD BATTLE 10000 57.2 37.1 154 47.3 40.2 118
SANDSTONE RS 8150 23.1 8.7 266 33.6 22.1 152
WHISKEY PARK 8950 -M 30.3 * 53.5 34.2 156
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Basin wide percent of average 174 138
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.5 13.0 150 19.7 16.1 122
BLIND BULL SUM 8650 44.1 27.6 160 28.9 25.4 114
EAST RIM DIVIDE 7930 16.8 12.8 131 16.8 14.0 120
ELKHART PARK G.S. 9400 17.8 12.5 142 17.6 16.2 109
GROS VENTRE SUMMIT 8750 18.4 12.9 143 19.2 15.4 125
GUNSIGHT PASS 9820 23.9 -M * 22.0 -M *
KENDALL R.S. 7740 14.0 9.2 152 19.7 16.7 118
LOOMIS PARK 8240 25.4 13.8 184 26.7 20.1 133
NEW FORK LAKE 8340 14.9 7.9 189 14.2 13.6 104
POCKET CREEK 9360 17.3 -M * 18.7 -M *
SNIDER BASIN 8060 24.3 12.1 201 23.3 18.7 125
SPRING CREEK DIVIDE 9000 44.5 28.3 157 40.4 30.4 133
TRIPLE PEAK 8500 42.3 23.1 183 43.0 28.9 149
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Basin wide percent of average 163 125
LOWER GREEN RIVER
HAMS FORK 7840 17.5 5.3 330 19.1 14.9 128
HEWINTA 9519 18.0 8.6 209 23.2 18.0 129
HICKERSON PARK 9145 5.0 5.2 96 13.1 10.4 126
HOLE-IN-ROCK 9150 9.6 4.3 223 14.8 9.9 149
INDIAN CREEK 9425 40.4 27.9 145 33.7 29.7 113
KELLEY R.S. 8180 26.1 13.5 193 29.8 23.8 125
STEEL CREEK PARK 10200 25.2 18.8 134 27.1 20.5 132
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Basin wide percent of average 170 126
UPPER BEAR RIVER
BUG LAKE 7950 36.5 17.2 212 36.3 22.6 161
HAYDEN FORK 9212 -M 12.3 * 38.0 25.4 150
KELLEY R.S. 8180 26.1 13.5 193 29.8 23.8 125
LILY LAKE 9156 27.3 10.5 260 28.9 21.3 136
MONTE CRISTO 8960 49.0 27.7 177 46.8 30.6 153
SALT RIVER SUMMIT 7760 21.0 9.9 212 26.9 21.8 123
TRIAL LAKE 9992 47.5 26.3 181 42.6 29.7 143
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Basin wide percent of average 197 142
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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.