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 WEDNESDAY: APRIL 27 , 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 26.1 13.6 192 30.7 24.0 128
COTTONWOOD CREEK 7670 36.5 21.1 173 44.3 31.4 141
GRAND TARGHEE 9260 61.0 -M * 45.1 -M *
GRANITE CREEK 6770 26.1 14.1 185 29.6 22.1 134
GRASSY LAKE 7265 48.9 34.7 141 50.9 40.3 126
GROS VENTRE SUMMIT 8750 18.4 13.8 133 18.7 15.0 125
GUNSIGHT PASS 9820 23.4 -M * 21.6 -M *
LEWIS LAKE DIVIDE 7850 54.5 35.5 154 44.4 41.1 108
PHILLIPS BENCH 8200 39.9 30.1 133 41.2 32.6 126
SALT RIVER SUMMIT 7760 20.8 11.9 175 26.4 21.3 124
SNAKE RIVER STATION 6920 -M 13.8 * 32.9 25.2 131
SPRING CREEK DIVIDE 9000 43.9 28.8 152 39.8 29.8 134
THUMB DIVIDE 7980 28.9 16.1 180 26.3 21.6 122
TOGWOTEE PASS 9580 37.3 27.7 135 38.7 28.4 136
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 *
WILLOW CREEK 8380 47.5 31.4 151 51.4 37.0 139
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Basin wide percent of average 154 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 32.3 25.8 125 31.0 23.0 135
BLACK BEAR 8170 56.8 40.5 140 54.5 45.2 121
CANYON 7870 21.5 12.0 179 23.1 17.4 133
FISHER CREEK 9100 50.6 37.8 134 47.9 41.2 116
MADISON PLATEAU 7750 37.4 25.1 149 39.2 30.0 131
NORTHEAST ENTRANCE 7350 17.2 8.0 215 19.3 14.5 133
PARKER PEAK 9400 37.4 24.4 153 31.8 19.1 166
SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149
THUMB DIVIDE 7980 28.9 16.1 180 26.3 21.6 122
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 *
WHISKEY CREEK 6800 24.2 16.1 150 29.0 23.8 122
WHITE MILL 8700 35.5 26.4 134 35.1 30.6 115
WOLVERINE 7650 17.3 8.1 214 17.9 14.9 120
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Basin wide percent of average 148 128
WIND RIVER
BURROUGHS CREEK 8750 20.6 14.3 144 21.5 18.9 114
CASTLE CREEK 8400 7.7 -M * 10.4 -M *
COLD SPRINGS 9630 10.1 4.9 206 11.6 13.4 87
DEER PARK 9700 21.9 19.5 112 25.6 26.3 97
HOBBS PARK 10100 18.7 18.0 104 16.7 16.3 102
LITTLE WARM 9370 15.5 11.7 132 16.2 16.3 99
SOUTH PASS 9040 19.0 18.2 104 16.8 22.1 76
ST. LAWRENCE ALT 8620 4.2 6.5 65 9.6 11.6 83
TOGWOTEE PASS 9580 37.3 27.7 135 38.7 28.4 136
TOWNSEND CREEK 8700 9.3 9.7 96 13.2 15.0 88
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Basin wide percent of average 120 101
BIGHORN BASIN
BALD MTN. 9380 30.2 23.3 130 24.6 20.7 119
BEAR TRAP MEADOW 8200 11.0 2.9 379 11.8 10.5 112
BLACKWATER 9780 36.2 28.3 128 34.2 24.2 141
BONE SPRINGS DIV 9350 26.8 18.2 147 21.8 17.8 122
EVENING STAR 9200 40.7 32.9 124 42.5 29.3 145
GRAVE SPRINGS 8550 11.3 11.1 102 11.8 12.7 93
KIRWIN 9550 16.7 12.9 129 17.3 13.8 125
MARQUETTE 8760 6.6 -M * 9.8 13.1 75
MIDDLE POWDER 7760 13.3 14.6 91 13.3 15.3 87
OWL CREEK 8975 7.5 4.1 183 8.8 7.9 111
POWDER RIVER PASS 9480 19.8 11.1 178 22.9 15.3 150
SHELL CREEK 9580 23.0 16.7 138 20.7 16.3 127
SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149
SYLVAN ROAD 7120 18.0 9.2 196 26.7 20.1 133
TIMBER CREEK 7950 6.3 5.1 124 8.0 10.0 80
YOUNTS PEAK 8350 23.3 18.2 128 20.6 18.5 111
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Basin wide percent of average 136 123
SHOSHONE RIVER
BLACKWATER 9780 36.2 28.3 128 34.2 24.2 141
EVENING STAR 9200 40.7 32.9 124 42.5 29.3 145
KIRWIN 9550 16.7 12.9 129 17.3 13.8 125
MARQUETTE 8760 6.6 -M * 9.8 13.1 75
SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149
SYLVAN ROAD 7120 18.0 9.2 196 26.7 20.1 133
YOUNTS PEAK 8350 23.3 18.2 128 20.6 18.5 111
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Basin wide percent of average 133 131
POWDER-TONGUE
BEAR TRAP MEADOW 8200 11.0 2.9 379 11.8 10.5 112
BIG GOOSE 7990 12.3 12.1 102 14.3 12.4 115
BONE SPRINGS DIV 9350 26.8 18.2 147 21.8 17.8 122
BURGESS JUNCTION 7880 14.8 13.5 110 15.6 15.0 104
CLOUD PEAK RESERVOIR 9860 20.8 16.3 128 19.5 16.5 118
DOME LAKE 8880 18.3 13.8 133 17.8 16.3 109
GRAVE SPRINGS 8550 11.3 11.1 102 11.8 12.7 93
HANSEN SAWMILL 8360 10.1 5.2 194 11.5 10.6 108
LITTLE GOOSE 8870 14.5 -M * 18.7 -M *
MIDDLE POWDER 7760 13.3 14.6 91 13.3 15.3 87
POWDER RIVER PASS 9480 19.8 11.1 178 22.9 15.3 150
SOLDIER PARK 8720 11.1 -M * 12.2 -M *
SUCKER CREEK 8880 17.6 13.5 130 19.4 16.8 115
TIE CREEK 6870 8.5 4.8 177 13.7 13.0 105
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Basin wide percent of average 135 112
BELLE FOURCHE
BLIND PARK 6890 10.9 5.2 210 20.7 13.7 151
COLE CANYON 5910 8.6 5.8 148 15.5 9.0 172
NORTH RAPID CREEK 6130 6.4 5.6 114 16.6 10.9 152
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Basin wide percent of average 156 157
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.3 16.6 189 36.9 23.0 160
COLUMBINE 9160 39.7 22.3 178 43.2 28.7 151
DIVIDE PEAK 8880 31.1 20.2 154 36.0 23.8 151
ELK RIVER 8700 29.9 16.6 180 33.5 22.6 148
JOE WRIGHT 10120 46.1 24.9 185 46.6 29.4 159
NORTH FRENCH CREEK 10130 -M 34.3 * 61.5 28.9 213
OLD BATTLE 10000 55.5 36.4 152 47.2 39.2 120
SAGE CREEK BASIN 7850 19.7 11.7 168 23.7 13.8 172
SOUTH BRUSH CREEK 8440 24.5 11.9 206 29.6 19.6 151
TOWER 10500 70.6 51.8 136 47.7 44.3 108
WEBBER SPRINGS 9250 39.0 25.8 151 45.2 30.6 148
WILLOW CREEK PASS 9540 26.3 14.3 184 23.9 15.3 156
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Basin wide percent of average 164 149
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.7 28.2 148 38.0 26.3 144
CASPER MTN. 7900 12.7 17.5 73 17.7 18.8 94
DEADMAN HILL 10220 30.2 19.5 155 29.7 20.4 146
DEER PARK 9700 21.9 19.5 112 25.6 26.3 97
LAPRELE CREEK 8375 14.6 8.1 180 17.6 15.9 111
RENO HILL 8400 18.0 15.5 116 21.5 19.5 110
ROACH 9700 27.6 18.7 148 30.8 21.9 141
SAND LAKE 10050 48.4 36.7 132 -M 28.6 *
SOUTH PASS 9040 19.0 18.2 104 16.8 22.1 76
WINDY PEAK 7900 10.5 5.9 178 16.4 13.1 125
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Basin wide percent of average 130 116
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 5.7 * 21.2 18.2 116
DIVIDE PEAK 8880 31.1 20.2 154 36.0 23.8 151
OLD BATTLE 10000 55.5 36.4 152 47.2 39.2 120
SANDSTONE RS 8150 22.8 10.8 211 33.0 21.4 154
WHISKEY PARK 8950 -M 30.7 * 47.2 33.1 143
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Basin wide percent of average 162 136
UPPER GREEN RIVER
BIG SANDY OPENING 9080 19.3 14.3 135 19.3 15.5 125
BLIND BULL SUM 8650 42.9 28.3 152 28.7 24.8 116
EAST RIM DIVIDE 7930 17.4 13.7 127 16.6 13.6 122
ELKHART PARK G.S. 9400 17.4 13.4 130 17.2 15.6 110
GROS VENTRE SUMMIT 8750 18.4 13.8 133 18.7 15.0 125
GUNSIGHT PASS 9820 23.4 -M * 21.6 -M *
KENDALL R.S. 7740 15.3 11.2 137 19.5 16.3 120
LOOMIS PARK 8240 25.3 15.2 166 26.4 19.6 135
NEW FORK LAKE 8340 15.1 9.4 161 14.0 13.1 107
POCKET CREEK 9360 16.9 -M * 18.4 -M *
SNIDER BASIN 8060 24.3 13.5 180 22.9 18.3 125
SPRING CREEK DIVIDE 9000 43.9 28.8 152 39.8 29.8 134
TRIPLE PEAK 8500 41.7 24.8 168 42.1 28.2 149
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Basin wide percent of average 151 126
LOWER GREEN RIVER
HAMS FORK 7840 17.4 7.1 245 18.7 14.4 130
HEWINTA 9519 16.7 10.3 162 22.1 17.4 127
HICKERSON PARK 9145 5.2 6.6 79 12.5 9.9 126
HOLE-IN-ROCK 9150 9.1 5.6 163 14.2 9.4 151
INDIAN CREEK 9425 39.5 29.0 136 33.0 29.0 114
KELLEY R.S. 8180 25.9 15.2 170 29.1 23.2 125
STEEL CREEK PARK 10200 23.6 18.3 129 25.8 19.8 130
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Basin wide percent of average 149 126
UPPER BEAR RIVER
BUG LAKE 7950 36.4 19.4 188 35.8 22.0 163
HAYDEN FORK 9212 -M 14.2 * 36.9 24.6 150
KELLEY R.S. 8180 25.9 15.2 170 29.1 23.2 125
LILY LAKE 9156 26.6 12.3 216 27.9 20.7 135
MONTE CRISTO 8960 48.2 29.2 165 45.8 29.7 154
SALT RIVER SUMMIT 7760 20.8 11.9 175 26.4 21.3 124
TRIAL LAKE 9992 45.8 26.6 172 41.0 28.9 142
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Basin wide percent of average 178 143
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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.