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 9 , 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 22.9 9.1 252 32.5 25.1 129
COTTONWOOD CREEK 7670 36.5 16.6 220 46.3 33.1 140
GRAND TARGHEE 9260 65.0 -M * 46.0 -M *
GRANITE CREEK 6770 23.6 10.1 234 31.7 23.1 137
GRASSY LAKE 7265 45.5 29.8 153 53.5 42.0 127
GROS VENTRE SUMMIT 8750 19.1 11.6 165 20.5 15.9 129
GUNSIGHT PASS 9820 -M -M * 23.4 -M *
LEWIS LAKE DIVIDE 7850 56.7 31.8 178 48.3 42.7 113
PHILLIPS BENCH 8200 43.2 26.8 161 44.1 34.1 129
SALT RIVER SUMMIT 7760 18.9 7.6 249 27.4 22.3 123
SNAKE RIVER STATION 6920 -M 8.7 * 34.6 26.3 132
SPRING CREEK DIVIDE 9000 44.9 26.9 167 41.0 31.0 132
THUMB DIVIDE 7980 27.9 12.1 231 27.9 22.8 122
TOGWOTEE PASS 9580 39.7 28.0 142 40.4 30.0 135
TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.3 *
WILLOW CREEK 8380 48.7 28.1 173 54.3 39.1 139
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Basin wide percent of average 179 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 34.1 25.9 132 33.1 24.5 135
BLACK BEAR 8170 56.4 38.3 147 57.5 47.1 122
CANYON 7870 20.6 8.9 231 24.3 18.4 132
FISHER CREEK 9100 53.1 37.5 142 51.4 43.2 119
MADISON PLATEAU 7750 36.8 21.9 168 40.6 31.4 129
NORTHEAST ENTRANCE 7350 13.8 5.2 265 20.8 15.5 134
PARKER PEAK 9400 39.5 24.4 162 33.8 20.5 165
SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147
THUMB DIVIDE 7980 27.9 12.1 231 27.9 22.8 122
TWO OCEAN PLATEAU 9240 -M 31.5 * -M 33.3 *
WHISKEY CREEK 6800 22.7 12.4 183 30.1 25.0 120
WHITE MILL 8700 37.7 25.9 146 37.5 32.3 116
WOLVERINE 7650 15.0 5.1 294 19.3 16.0 121
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Basin wide percent of average 163 128
WIND RIVER
BURROUGHS CREEK 8750 21.3 11.6 184 23.4 20.2 116
CASTLE CREEK 8400 3.0 -M * 11.1 -M *
COLD SPRINGS 9630 6.5 4.4 148 11.9 14.9 80
DEER PARK 9700 21.1 16.4 129 26.4 28.0 94
HOBBS PARK 10100 17.7 17.4 102 17.4 18.1 96
LITTLE WARM 9370 15.5 9.1 170 17.6 17.8 99
SOUTH PASS 9040 16.9 16.0 106 17.4 23.8 73
ST. LAWRENCE ALT 8620 .0 4.9 0 10.0 13.1 76
TOGWOTEE PASS 9580 39.7 28.0 142 40.4 30.0 135
TOWNSEND CREEK 8700 6.0 7.2 83 14.0 16.5 85
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Basin wide percent of average 126 98
BIGHORN BASIN
BALD MTN. 9380 32.8 23.5 140 26.5 22.5 118
BEAR TRAP MEADOW 8200 9.2 1.6 575 12.7 11.8 108
BLACKWATER 9780 38.3 28.7 133 36.2 25.8 140
BONE SPRINGS DIV 9350 28.3 17.3 164 23.4 19.4 121
EVENING STAR 9200 42.1 33.2 127 45.3 31.1 146
GRAVE SPRINGS 8550 11.1 9.8 113 13.0 14.1 92
KIRWIN 9550 16.7 12.3 136 18.6 15.1 123
MARQUETTE 8760 7.3 -M * 10.7 14.9 72
MIDDLE POWDER 7760 14.1 12.7 111 14.6 16.8 87
OWL CREEK 8975 3.6 3.2 113 9.2 9.0 102
POWDER RIVER PASS 9480 20.0 9.3 215 24.4 16.9 144
SHELL CREEK 9580 24.2 16.8 144 22.3 17.9 125
SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147
SYLVAN ROAD 7120 12.4 5.3 234 28.3 21.3 133
TIMBER CREEK 7950 2.8 3.5 80 8.8 11.6 76
YOUNTS PEAK 8350 23.5 17.0 138 22.4 19.6 114
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Basin wide percent of average 144 121
SHOSHONE RIVER
BLACKWATER 9780 38.3 28.7 133 36.2 25.8 140
EVENING STAR 9200 42.1 33.2 127 45.3 31.1 146
KIRWIN 9550 16.7 12.3 136 18.6 15.1 123
MARQUETTE 8760 7.3 -M * 10.7 14.9 72
SYLVAN LAKE 8420 33.3 22.1 151 38.0 25.8 147
SYLVAN ROAD 7120 12.4 5.3 234 28.3 21.3 133
YOUNTS PEAK 8350 23.5 17.0 138 22.4 19.6 114
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Basin wide percent of average 140 130
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.2 1.6 575 12.7 11.8 108
BIG GOOSE 7990 12.5 10.3 121 15.9 14.1 113
BONE SPRINGS DIV 9350 28.3 17.3 164 23.4 19.4 121
BURGESS JUNCTION 7880 15.8 11.9 133 17.5 16.4 107
CLOUD PEAK RESERVOIR 9860 21.1 15.6 135 21.3 18.4 116
DOME LAKE 8880 18.9 11.8 160 19.5 18.0 108
GRAVE SPRINGS 8550 11.1 9.8 113 13.0 14.1 92
HANSEN SAWMILL 8360 8.8 3.7 238 12.3 11.8 104
LITTLE GOOSE 8870 14.9 -M * 20.3 -M *
MIDDLE POWDER 7760 14.1 12.7 111 14.6 16.8 87
POWDER RIVER PASS 9480 20.0 9.3 215 24.4 16.9 144
SOLDIER PARK 8720 10.7 -M * 13.3 -M *
SUCKER CREEK 8880 18.7 11.6 161 21.5 18.7 115
TIE CREEK 6870 7.3 2.7 270 15.3 14.6 105
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Basin wide percent of average 157 111
BELLE FOURCHE
BLIND PARK 6890 7.0 1.8 389 21.8 15.2 143
COLE CANYON 5910 6.0 1.8 333 16.8 10.5 160
NORTH RAPID CREEK 6130 2.1 1.4 150 17.3 12.2 142
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Basin wide percent of average 302 147
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 32.3 13.8 234 42.6 24.7 172
COLUMBINE 9160 37.4 16.9 221 44.6 30.1 148
DIVIDE PEAK 8880 30.7 16.0 192 37.2 25.2 148
ELK RIVER 8700 26.7 10.9 245 34.4 23.9 144
JOE WRIGHT 10120 48.4 24.8 195 48.5 31.5 154
NORTH FRENCH CREEK 10130 63.0 34.3 184 61.6 31.1 198
OLD BATTLE 10000 57.1 37.0 154 -M 41.2 *
SAGE CREEK BASIN 7850 12.1 9.3 130 24.1 14.6 165
SOUTH BRUSH CREEK 8440 21.8 8.6 253 31.0 21.2 146
TOWER 10500 73.3 52.4 140 -M 46.8 *
WEBBER SPRINGS 9250 38.4 21.8 176 46.5 32.2 144
WILLOW CREEK PASS 9540 26.0 13.1 198 25.2 16.5 153
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Basin wide percent of average 180 158
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.4 26.1 159 41.7 28.3 147
CASPER MTN. 7900 11.4 14.5 79 18.7 20.9 89
DEADMAN HILL 10220 30.8 19.2 160 31.0 22.1 140
DEER PARK 9700 21.1 16.4 129 26.4 28.0 94
LAPRELE CREEK 8375 11.7 5.1 229 18.3 17.5 105
RENO HILL 8400 16.8 12.2 138 22.9 21.6 106
ROACH 9700 27.1 16.1 168 31.6 23.6 134
SAND LAKE 10050 50.1 36.7 137 47.9 30.8 156
SOUTH PASS 9040 16.9 16.0 106 17.4 23.8 73
WINDY PEAK 7900 6.9 3.0 230 17.1 14.5 118
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Basin wide percent of average 142 118
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 2.3 * 22.3 19.3 116
DIVIDE PEAK 8880 30.7 16.0 192 37.2 25.2 148
OLD BATTLE 10000 57.1 37.0 154 -M 41.2 *
SANDSTONE RS 8150 21.1 6.2 340 34.0 22.8 149
WHISKEY PARK 8950 -M 29.0 * 54.0 35.2 153
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Basin wide percent of average 184 144
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.7 11.2 158 19.9 16.7 119
BLIND BULL SUM 8650 45.3 26.5 171 30.4 26.0 117
EAST RIM DIVIDE 7930 13.2 11.2 118 17.6 14.4 122
ELKHART PARK G.S. 9400 17.5 11.1 158 18.0 16.8 107
GROS VENTRE SUMMIT 8750 19.1 11.6 165 20.5 15.9 129
GUNSIGHT PASS 9820 -M -M * 23.4 -M *
KENDALL R.S. 7740 12.5 6.7 187 20.7 17.1 121
LOOMIS PARK 8240 23.1 11.9 194 27.6 20.6 134
NEW FORK LAKE 8340 12.8 6.0 213 14.4 14.0 103
POCKET CREEK 9360 15.6 -M * 18.8 -M *
SNIDER BASIN 8060 20.2 10.1 200 23.6 19.1 124
SPRING CREEK DIVIDE 9000 44.9 26.9 167 41.0 31.0 132
TRIPLE PEAK 8500 41.1 20.4 201 44.0 29.6 149
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Basin wide percent of average 174 126
LOWER GREEN RIVER
HAMS FORK 7840 12.1 3.3 367 19.3 15.4 125
HEWINTA 9519 14.0 6.6 212 23.5 18.6 126
HICKERSON PARK 9145 .4 3.6 11 13.2 10.9 121
HOLE-IN-ROCK 9150 5.3 3.0 177 15.1 10.4 145
INDIAN CREEK 9425 39.0 26.1 149 34.0 30.4 112
KELLEY R.S. 8180 23.0 11.4 202 30.0 24.3 123
STEEL CREEK PARK 10200 25.3 18.9 134 27.4 21.1 130
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Basin wide percent of average 163 124
UPPER BEAR RIVER
BUG LAKE 7950 35.0 14.2 246 36.7 23.2 158
HAYDEN FORK 9212 25.6 9.9 259 38.2 26.1 146
KELLEY R.S. 8180 23.0 11.4 202 30.0 24.3 123
LILY LAKE 9156 24.8 8.5 292 29.2 22.0 133
MONTE CRISTO 8960 48.8 25.5 191 47.1 31.4 150
SALT RIVER SUMMIT 7760 18.9 7.6 249 27.4 22.3 123
TRIAL LAKE 9992 -M 25.2 * 42.9 30.5 141
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Basin wide percent of average 228 140
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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.