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 SUNDAY: MAY 1 , 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 26.3 12.3 214 31.0 24.4 127
COTTONWOOD CREEK 7670 37.3 19.8 188 45.2 31.9 142
GRAND TARGHEE 9260 62.4 -M * 45.3 -M *
GRANITE CREEK 6770 25.8 12.8 202 29.8 22.4 133
GRASSY LAKE 7265 49.4 33.4 148 51.5 40.9 126
GROS VENTRE SUMMIT 8750 18.7 13.3 141 19.1 15.3 125
GUNSIGHT PASS 9820 23.8 -M * 21.9 -M *
LEWIS LAKE DIVIDE 7850 55.1 34.6 159 44.5 41.6 107
PHILLIPS BENCH 8200 40.4 29.4 137 41.7 33.1 126
SALT RIVER SUMMIT 7760 21.1 10.6 199 26.8 21.6 124
SNAKE RIVER STATION 6920 -M 12.2 * 33.1 25.5 130
SPRING CREEK DIVIDE 9000 44.5 28.6 156 40.4 30.2 134
THUMB DIVIDE 7980 29.4 14.9 197 26.9 22.0 122
TOGWOTEE PASS 9580 37.8 27.9 135 39.3 29.0 136
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 *
WILLOW CREEK 8380 48.7 30.6 159 52.7 37.7 140
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Basin wide percent of average 162 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.3 25.9 129 31.9 23.5 136
BLACK BEAR 8170 57.9 39.9 145 54.6 45.8 119
CANYON 7870 21.7 11.3 192 23.3 17.7 132
FISHER CREEK 9100 51.4 37.8 136 -M 41.9 *
MADISON PLATEAU 7750 38.0 24.2 157 39.6 30.4 130
NORTHEAST ENTRANCE 7350 17.2 7.1 242 19.6 14.8 132
PARKER PEAK 9400 38.3 24.5 156 -M 19.5 *
SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148
THUMB DIVIDE 7980 29.4 14.9 197 26.9 22.0 122
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 *
WHISKEY CREEK 6800 24.7 15.2 163 29.3 24.2 121
WHITE MILL 8700 36.1 26.4 137 35.7 31.2 114
WOLVERINE 7650 17.4 7.2 242 18.5 15.2 122
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Basin wide percent of average 154 127
WIND RIVER
BURROUGHS CREEK 8750 20.7 13.6 152 21.6 19.3 112
CASTLE CREEK 8400 7.2 -M * 10.4 -M *
COLD SPRINGS 9630 9.6 4.8 200 11.5 13.9 83
DEER PARK 9700 22.3 18.6 120 26.1 27.0 97
HOBBS PARK 10100 19.1 18.0 106 17.0 16.9 101
LITTLE WARM 9370 15.9 11.1 143 16.4 16.8 98
SOUTH PASS 9040 19.7 18.0 109 17.0 22.7 75
ST. LAWRENCE ALT 8620 3.7 6.1 61 9.7 12.1 80
TOGWOTEE PASS 9580 37.8 27.9 135 39.3 29.0 136
TOWNSEND CREEK 8700 9.4 9.1 103 13.6 15.5 88
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Basin wide percent of average 124 99
BIGHORN BASIN
BALD MTN. 9380 32.1 23.6 136 25.8 21.3 121
BEAR TRAP MEADOW 8200 11.4 2.5 456 12.4 10.9 114
BLACKWATER 9780 36.7 28.8 127 34.6 24.7 140
BONE SPRINGS DIV 9350 28.2 18.3 154 22.6 18.3 123
EVENING STAR 9200 41.5 33.3 125 -M 29.9 *
GRAVE SPRINGS 8550 12.3 11.1 111 12.7 13.1 97
KIRWIN 9550 16.9 13.0 130 17.4 14.2 123
MARQUETTE 8760 7.1 -M * 10.1 13.7 74
MIDDLE POWDER 7760 14.8 14.3 103 14.3 15.8 91
OWL CREEK 8975 7.8 4.0 195 9.0 8.2 110
POWDER RIVER PASS 9480 20.7 10.7 193 23.9 15.8 151
SHELL CREEK 9580 24.4 16.8 145 21.8 16.8 130
SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148
SYLVAN ROAD 7120 18.2 8.1 225 27.0 20.5 132
TIMBER CREEK 7950 7.0 4.8 146 8.1 10.5 77
YOUNTS PEAK 8350 23.7 18.1 131 20.9 18.8 111
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Basin wide percent of average 142 120
SHOSHONE RIVER
BLACKWATER 9780 36.7 28.8 127 34.6 24.7 140
EVENING STAR 9200 41.5 33.3 125 -M 29.9 *
KIRWIN 9550 16.9 13.0 130 17.4 14.2 123
MARQUETTE 8760 7.1 -M * 10.1 13.7 74
SYLVAN LAKE 8420 33.2 23.8 139 36.6 24.7 148
SYLVAN ROAD 7120 18.2 8.1 225 27.0 20.5 132
YOUNTS PEAK 8350 23.7 18.1 131 20.9 18.8 111
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Basin wide percent of average 136 126
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.4 2.5 456 12.4 10.9 114
BIG GOOSE 7990 13.1 11.6 113 15.2 12.9 118
BONE SPRINGS DIV 9350 28.2 18.3 154 22.6 18.3 123
BURGESS JUNCTION 7880 15.9 13.3 120 16.6 15.4 108
CLOUD PEAK RESERVOIR 9860 22.0 16.2 136 20.5 17.1 120
DOME LAKE 8880 19.4 13.5 144 18.9 16.8 113
GRAVE SPRINGS 8550 12.3 11.1 111 12.7 13.1 97
HANSEN SAWMILL 8360 10.5 4.9 214 12.0 11.0 109
LITTLE GOOSE 8870 15.5 -M * 19.6 -M *
MIDDLE POWDER 7760 14.8 14.3 103 14.3 15.8 91
POWDER RIVER PASS 9480 20.7 10.7 193 23.9 15.8 151
SOLDIER PARK 8720 11.8 -M * 13.0 -M *
SUCKER CREEK 8880 18.9 13.1 144 20.8 17.4 120
TIE CREEK 6870 8.8 3.9 226 14.5 13.5 107
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Basin wide percent of average 147 115
BELLE FOURCHE
BLIND PARK 6890 -M 4.0 * 21.6 14.2 152
COLE CANYON 5910 9.2 5.0 184 16.4 9.5 173
NORTH RAPID CREEK 6130 6.2 3.8 163 16.9 11.4 148
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Basin wide percent of average 175 156
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.7 16.0 192 36.9 23.6 156
COLUMBINE 9160 40.5 20.9 194 44.2 29.2 151
DIVIDE PEAK 8880 31.8 19.3 165 36.6 24.3 151
ELK RIVER 8700 30.5 15.0 203 34.0 23.0 148
JOE WRIGHT 10120 48.0 25.1 191 48.2 30.1 160
NORTH FRENCH CREEK 10130 -M 34.5 * 59.0 29.7 199
OLD BATTLE 10000 56.7 36.9 154 47.3 39.9 119
SAGE CREEK BASIN 7850 19.4 11.2 173 23.9 14.1 170
SOUTH BRUSH CREEK 8440 25.2 11.1 227 30.5 20.1 152
TOWER 10500 72.6 52.2 139 47.7 45.1 106
WEBBER SPRINGS 9250 39.4 25.1 157 46.1 31.1 148
WILLOW CREEK PASS 9540 27.0 14.2 190 24.7 15.7 157
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Basin wide percent of average 171 147
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.0 28.2 149 38.0 27.0 141
CASPER MTN. 7900 13.6 17.1 80 18.6 19.5 95
DEADMAN HILL 10220 31.2 19.7 158 30.5 21.0 145
DEER PARK 9700 22.3 18.6 120 26.1 27.0 97
LAPRELE CREEK 8375 14.9 7.1 210 18.0 16.5 109
RENO HILL 8400 18.7 14.7 127 22.2 20.2 110
ROACH 9700 28.2 18.5 152 31.3 22.4 140
SAND LAKE 10050 49.4 37.0 134 -M 29.3 *
SOUTH PASS 9040 19.7 18.0 109 17.0 22.7 75
WINDY PEAK 7900 10.0 4.9 204 16.6 13.5 123
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Basin wide percent of average 136 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 4.6 * 21.6 18.6 116
DIVIDE PEAK 8880 31.8 19.3 165 36.6 24.3 151
OLD BATTLE 10000 56.7 36.9 154 47.3 39.9 119
SANDSTONE RS 8150 23.1 9.5 243 33.6 21.9 153
WHISKEY PARK 8950 -M 30.5 * 53.5 33.8 158
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Basin wide percent of average 170 139
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.5 13.5 144 19.6 15.9 123
BLIND BULL SUM 8650 43.7 27.9 157 28.8 25.2 114
EAST RIM DIVIDE 7930 17.4 13.2 132 16.7 13.9 120
ELKHART PARK G.S. 9400 17.9 12.8 140 17.4 16.0 109
GROS VENTRE SUMMIT 8750 18.7 13.3 141 19.1 15.3 125
GUNSIGHT PASS 9820 23.8 -M * 21.9 -M *
KENDALL R.S. 7740 14.5 10.0 145 19.6 16.6 118
LOOMIS PARK 8240 25.3 14.3 177 26.6 19.9 134
NEW FORK LAKE 8340 15.1 8.4 180 14.1 13.4 105
POCKET CREEK 9360 17.2 -M * 18.6 -M *
SNIDER BASIN 8060 24.4 12.6 194 23.1 18.5 125
SPRING CREEK DIVIDE 9000 44.5 28.6 156 40.4 30.2 134
TRIPLE PEAK 8500 42.2 23.7 178 42.9 28.6 150
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Basin wide percent of average 159 126
LOWER GREEN RIVER
HAMS FORK 7840 17.9 6.0 298 19.0 14.7 129
HEWINTA 9519 17.5 9.3 188 23.0 17.8 129
HICKERSON PARK 9145 4.3 5.7 75 12.7 10.2 125
HOLE-IN-ROCK 9150 9.2 4.7 196 14.7 9.7 152
INDIAN CREEK 9425 40.4 28.3 143 33.6 29.5 114
KELLEY R.S. 8180 26.5 14.1 188 29.7 23.6 126
STEEL CREEK PARK 10200 24.9 18.7 133 27.0 20.2 134
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Basin wide percent of average 162 127
UPPER BEAR RIVER
BUG LAKE 7950 -M 18.0 * -M 22.4 *
HAYDEN FORK 9212 -M 13.0 * 37.9 25.1 151
KELLEY R.S. 8180 26.5 14.1 188 29.7 23.6 126
LILY LAKE 9156 27.6 11.1 249 28.9 21.1 137
MONTE CRISTO 8960 48.8 28.3 172 46.7 30.3 154
SALT RIVER SUMMIT 7760 21.1 10.6 199 26.8 21.6 124
TRIAL LAKE 9992 47.3 26.5 178 42.4 29.4 144
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Basin wide percent of average 189 141
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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.