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: APRIL 30 , 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 25.9 12.6 206 30.8 24.3 127
COTTONWOOD CREEK 7670 37.4 20.1 186 45.2 31.8 142
GRAND TARGHEE 9260 62.1 -M * 45.2 -M *
GRANITE CREEK 6770 25.7 13.2 195 29.8 22.3 134
GRASSY LAKE 7265 49.3 33.7 146 51.5 40.7 127
GROS VENTRE SUMMIT 8750 18.6 13.4 139 19.1 15.2 126
GUNSIGHT PASS 9820 23.7 -M * 21.9 -M *
LEWIS LAKE DIVIDE 7850 55.1 34.8 158 44.5 41.5 107
PHILLIPS BENCH 8200 40.4 29.6 136 41.5 33.0 126
SALT RIVER SUMMIT 7760 21.1 11.0 192 26.8 21.5 125
SNAKE RIVER STATION 6920 -M 12.6 * 33.1 25.4 130
SPRING CREEK DIVIDE 9000 44.5 28.7 155 40.4 30.1 134
THUMB DIVIDE 7980 29.4 15.3 192 26.9 21.9 123
TOGWOTEE PASS 9580 37.7 27.9 135 39.2 28.8 136
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 *
WILLOW CREEK 8380 48.7 30.9 158 52.7 37.5 141
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Basin wide percent of average 160 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.1 25.9 128 31.8 23.4 136
BLACK BEAR 8170 57.7 40.1 144 54.6 45.7 119
CANYON 7870 21.6 11.5 188 23.3 17.6 132
FISHER CREEK 9100 51.3 37.8 136 -M 41.7 *
MADISON PLATEAU 7750 37.9 24.4 155 39.7 30.3 131
NORTHEAST ENTRANCE 7350 17.1 7.4 231 19.6 14.7 133
PARKER PEAK 9400 38.3 24.5 156 -M 19.4 *
SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148
THUMB DIVIDE 7980 29.4 15.3 192 26.9 21.9 123
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 *
WHISKEY CREEK 6800 24.7 15.4 160 29.2 24.1 121
WHITE MILL 8700 36.0 26.4 136 35.5 31.1 114
WOLVERINE 7650 17.4 7.4 235 18.4 15.1 122
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Basin wide percent of average 153 127
WIND RIVER
BURROUGHS CREEK 8750 20.6 13.8 149 21.5 19.2 112
CASTLE CREEK 8400 7.0 -M * 10.5 -M *
COLD SPRINGS 9630 9.6 4.9 196 11.5 13.8 83
DEER PARK 9700 22.0 19.0 116 26.0 26.8 97
HOBBS PARK 10100 19.0 18.0 106 16.8 16.8 100
LITTLE WARM 9370 15.5 11.3 137 16.4 16.7 98
SOUTH PASS 9040 19.2 18.1 106 16.9 22.6 75
ST. LAWRENCE ALT 8620 3.8 6.3 60 9.7 12.0 81
TOGWOTEE PASS 9580 37.7 27.9 135 39.2 28.8 136
TOWNSEND CREEK 8700 9.1 9.2 99 13.4 15.4 87
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Basin wide percent of average 122 100
BIGHORN BASIN
BALD MTN. 9380 31.2 23.5 133 25.4 21.2 120
BEAR TRAP MEADOW 8200 11.3 2.7 419 12.3 10.8 114
BLACKWATER 9780 36.7 28.7 128 34.6 24.6 141
BONE SPRINGS DIV 9350 27.5 18.3 150 22.1 18.2 121
EVENING STAR 9200 41.3 33.2 124 -M 29.8 *
GRAVE SPRINGS 8550 11.9 11.1 107 12.4 13.0 95
KIRWIN 9550 16.8 13.0 129 17.5 14.1 124
MARQUETTE 8760 6.8 -M * 9.7 13.6 71
MIDDLE POWDER 7760 14.3 14.5 99 14.0 15.7 89
OWL CREEK 8975 7.6 4.1 185 8.9 8.1 110
POWDER RIVER PASS 9480 20.4 10.9 187 23.5 15.7 150
SHELL CREEK 9580 23.9 16.9 141 21.5 16.7 129
SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148
SYLVAN ROAD 7120 17.9 8.4 213 27.0 20.4 132
TIMBER CREEK 7950 6.2 4.9 127 8.0 10.4 77
YOUNTS PEAK 8350 23.5 18.2 129 20.8 18.7 111
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Basin wide percent of average 139 120
SHOSHONE RIVER
BLACKWATER 9780 36.7 28.7 128 34.6 24.6 141
EVENING STAR 9200 41.3 33.2 124 -M 29.8 *
KIRWIN 9550 16.8 13.0 129 17.5 14.1 124
MARQUETTE 8760 6.8 -M * 9.7 13.6 71
SYLVAN LAKE 8420 33.0 23.9 138 36.5 24.6 148
SYLVAN ROAD 7120 17.9 8.4 213 27.0 20.4 132
YOUNTS PEAK 8350 23.5 18.2 129 20.8 18.7 111
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Basin wide percent of average 135 126
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.3 2.7 419 12.3 10.8 114
BIG GOOSE 7990 12.8 11.7 109 14.9 12.8 116
BONE SPRINGS DIV 9350 27.5 18.3 150 22.1 18.2 121
BURGESS JUNCTION 7880 15.3 13.3 115 16.2 15.3 106
CLOUD PEAK RESERVOIR 9860 21.5 16.3 132 20.1 16.9 119
DOME LAKE 8880 18.8 13.7 137 18.4 16.7 110
GRAVE SPRINGS 8550 11.9 11.1 107 12.4 13.0 95
HANSEN SAWMILL 8360 10.5 5.0 210 11.9 10.9 109
LITTLE GOOSE 8870 15.2 -M * 19.3 -M *
MIDDLE POWDER 7760 14.3 14.5 99 14.0 15.7 89
POWDER RIVER PASS 9480 20.4 10.9 187 23.5 15.7 150
SOLDIER PARK 8720 11.6 -M * 12.8 -M *
SUCKER CREEK 8880 18.1 13.2 137 20.0 17.3 116
TIE CREEK 6870 8.4 4.2 200 14.1 13.4 105
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Basin wide percent of average 141 113
BELLE FOURCHE
BLIND PARK 6890 -M 4.0 * 21.2 14.1 150
COLE CANYON 5910 8.9 5.2 171 16.1 9.4 171
NORTH RAPID CREEK 6130 5.9 4.2 140 16.8 11.3 149
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Basin wide percent of average 157 155
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.9 16.1 192 36.9 23.4 158
COLUMBINE 9160 41.1 21.3 193 44.0 29.0 152
DIVIDE PEAK 8880 31.8 19.6 162 36.5 24.2 151
ELK RIVER 8700 30.2 15.4 196 34.0 22.9 148
JOE WRIGHT 10120 47.8 25.1 190 48.0 29.9 161
NORTH FRENCH CREEK 10130 -M 34.5 * 60.0 29.5 203
OLD BATTLE 10000 56.8 36.8 154 47.3 39.7 119
SAGE CREEK BASIN 7850 19.0 11.4 167 23.9 14.0 171
SOUTH BRUSH CREEK 8440 24.9 11.3 220 30.3 20.0 152
TOWER 10500 72.4 52.1 139 47.7 44.9 106
WEBBER SPRINGS 9250 39.4 25.3 156 45.9 31.0 148
WILLOW CREEK PASS 9540 26.9 14.2 189 24.6 15.6 158
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Basin wide percent of average 169 148
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 42.1 28.3 149 38.0 26.8 142
CASPER MTN. 7900 13.4 17.3 77 18.4 19.4 95
DEADMAN HILL 10220 31.2 19.6 159 30.7 20.8 148
DEER PARK 9700 22.0 19.0 116 26.0 26.8 97
LAPRELE CREEK 8375 14.7 7.4 199 17.7 16.3 109
RENO HILL 8400 18.4 15.0 123 21.9 20.0 110
ROACH 9700 28.1 18.6 151 31.3 22.3 140
SAND LAKE 10050 49.3 36.9 134 -M 29.1 *
SOUTH PASS 9040 19.2 18.1 106 16.9 22.6 75
WINDY PEAK 7900 10.0 5.2 192 16.5 13.4 123
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Basin wide percent of average 134 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 4.9 * 21.6 18.5 117
DIVIDE PEAK 8880 31.8 19.6 162 36.5 24.2 151
OLD BATTLE 10000 56.8 36.8 154 47.3 39.7 119
SANDSTONE RS 8150 23.0 9.8 235 33.5 21.8 154
WHISKEY PARK 8950 -M 30.6 * 52.5 33.6 156
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Basin wide percent of average 169 139
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.4 13.7 142 19.6 15.8 124
BLIND BULL SUM 8650 43.5 28.0 155 28.9 25.1 115
EAST RIM DIVIDE 7930 17.1 13.3 129 16.7 13.8 121
ELKHART PARK G.S. 9400 17.6 13.0 135 17.4 15.9 109
GROS VENTRE SUMMIT 8750 18.6 13.4 139 19.1 15.2 126
GUNSIGHT PASS 9820 23.7 -M * 21.9 -M *
KENDALL R.S. 7740 14.6 10.3 142 19.5 16.5 118
LOOMIS PARK 8240 25.1 14.6 172 26.6 19.9 134
NEW FORK LAKE 8340 14.9 8.7 171 14.0 13.3 105
POCKET CREEK 9360 17.1 -M * 18.6 -M *
SNIDER BASIN 8060 24.1 12.9 187 23.1 18.5 125
SPRING CREEK DIVIDE 9000 44.5 28.7 155 40.4 30.1 134
TRIPLE PEAK 8500 42.3 24.0 176 42.8 28.5 150
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Basin wide percent of average 156 126
LOWER GREEN RIVER
HAMS FORK 7840 17.5 6.3 278 18.9 14.7 129
HEWINTA 9519 17.5 9.5 184 22.9 17.7 129
HICKERSON PARK 9145 4.7 5.9 80 12.7 10.1 126
HOLE-IN-ROCK 9150 8.9 5.0 178 14.4 9.7 148
INDIAN CREEK 9425 40.3 28.5 141 33.6 29.3 115
KELLEY R.S. 8180 26.3 14.4 183 29.7 23.5 126
STEEL CREEK PARK 10200 24.7 18.6 133 26.8 20.1 133
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Basin wide percent of average 159 127
UPPER BEAR RIVER
BUG LAKE 7950 -M 18.4 * -M 22.3 *
HAYDEN FORK 9212 -M 13.3 * 37.7 25.0 151
KELLEY R.S. 8180 26.3 14.4 183 29.7 23.5 126
LILY LAKE 9156 27.6 11.4 242 28.7 21.0 137
MONTE CRISTO 8960 48.9 28.5 172 46.5 30.1 154
SALT RIVER SUMMIT 7760 21.1 11.0 192 26.8 21.5 125
TRIAL LAKE 9992 47.1 26.5 178 42.3 29.3 144
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Basin wide percent of average 186 141
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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.