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 FRIDAY: APRIL 15 , 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 24.7 16.8 147 27.8 22.9 121
COTTONWOOD CREEK 7670 33.1 23.8 139 39.6 29.8 133
GRAND TARGHEE 9260 54.5 -M * 41.3 -M *
GRANITE CREEK 6770 24.6 17.0 145 27.1 21.1 128
GRASSY LAKE 7265 45.1 37.0 122 46.7 38.5 121
GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 14.0 125
GUNSIGHT PASS 9820 21.6 -M * 20.0 -M *
LEWIS LAKE DIVIDE 7850 47.6 36.7 130 -M 39.4 *
PHILLIPS BENCH 8200 37.3 30.6 122 37.2 31.2 119
SALT RIVER SUMMIT 7760 19.4 14.4 135 24.3 20.3 120
SNAKE RIVER STATION 6920 -M 17.5 * 30.2 24.0 126
SPRING CREEK DIVIDE 9000 39.5 28.5 139 36.2 28.5 127
THUMB DIVIDE 7980 25.4 18.7 136 23.3 20.5 114
TOGWOTEE PASS 9580 34.4 26.7 129 35.8 26.8 134
TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 *
WILLOW CREEK 8380 42.5 31.9 133 46.3 34.9 133
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Basin wide percent of average 132 125
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 30.3 25.5 119 29.1 21.8 133
BLACK BEAR 8170 51.9 40.9 127 50.4 43.3 116
CANYON 7870 19.9 13.9 143 21.3 16.6 128
FISHER CREEK 9100 -M 37.0 * -M 39.2 *
MADISON PLATEAU 7750 34.0 26.1 130 36.0 28.9 125
NORTHEAST ENTRANCE 7350 16.1 10.7 150 18.0 13.7 131
PARKER PEAK 9400 33.9 23.4 145 29.2 17.8 164
SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143
THUMB DIVIDE 7980 25.4 18.7 136 23.3 20.5 114
TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 *
WHISKEY CREEK 6800 23.1 17.8 130 26.4 22.6 117
WHITE MILL 8700 32.7 26.0 126 32.8 29.1 113
WOLVERINE 7650 16.7 11.0 152 16.7 13.9 120
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Basin wide percent of average 131 126
WIND RIVER
BURROUGHS CREEK 8750 19.2 15.1 127 20.0 17.7 113
CASTLE CREEK 8400 8.1 -M * 9.9 -M *
COLD SPRINGS 9630 9.9 7.1 139 10.9 12.1 90
DEER PARK 9700 20.9 17.1 122 24.4 24.1 101
HOBBS PARK 10100 18.3 16.8 109 16.1 14.7 110
LITTLE WARM 9370 14.5 12.5 116 15.0 14.9 101
SOUTH PASS 9040 18.6 17.7 105 16.2 20.4 79
ST. LAWRENCE ALT 8620 5.9 7.3 81 9.7 10.2 95
TOGWOTEE PASS 9580 34.4 26.7 129 35.8 26.8 134
TOWNSEND CREEK 8700 10.1 9.8 103 12.9 13.4 96
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Basin wide percent of average 117 104
BIGHORN BASIN
BALD MTN. 9380 27.6 21.9 126 22.4 19.1 117
BEAR TRAP MEADOW 8200 10.1 4.7 215 10.2 9.4 109
BLACKWATER 9780 31.7 26.9 118 30.2 22.6 134
BONE SPRINGS DIV 9350 23.3 17.7 132 19.1 16.3 117
EVENING STAR 9200 37.4 32.0 117 39.5 27.6 143
GRAVE SPRINGS 8550 10.8 10.7 101 11.0 11.4 96
KIRWIN 9550 15.6 12.3 127 16.5 12.5 132
MARQUETTE 8760 5.5 -M * 8.5 11.4 75
MIDDLE POWDER 7760 11.8 14.0 84 12.4 13.9 89
OWL CREEK 8975 7.9 5.2 152 8.2 6.9 119
POWDER RIVER PASS 9480 17.5 11.9 147 20.2 13.8 146
SHELL CREEK 9580 20.2 16.1 125 18.2 14.9 122
SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143
SYLVAN ROAD 7120 17.7 12.1 146 23.9 19.0 126
TIMBER CREEK 7950 6.3 5.7 111 7.6 8.6 88
YOUNTS PEAK 8350 21.4 18.1 118 18.8 17.5 107
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Basin wide percent of average 123 121
SHOSHONE RIVER
BLACKWATER 9780 31.7 26.9 118 30.2 22.6 134
EVENING STAR 9200 37.4 32.0 117 39.5 27.6 143
KIRWIN 9550 15.6 12.3 127 16.5 12.5 132
MARQUETTE 8760 5.5 -M * 8.5 11.4 75
SYLVAN LAKE 8420 28.8 24.2 119 32.5 22.8 143
SYLVAN ROAD 7120 17.7 12.1 146 23.9 19.0 126
YOUNTS PEAK 8350 21.4 18.1 118 18.8 17.5 107
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Basin wide percent of average 121 127
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.1 4.7 215 10.2 9.4 109
BIG GOOSE 7990 10.4 12.4 84 12.3 10.6 116
BONE SPRINGS DIV 9350 23.3 17.7 132 19.1 16.3 117
BURGESS JUNCTION 7880 13.0 13.2 98 13.8 13.6 101
CLOUD PEAK RESERVOIR 9860 19.1 15.3 125 17.9 14.7 122
DOME LAKE 8880 16.0 14.0 114 15.3 14.8 103
GRAVE SPRINGS 8550 10.8 10.7 101 11.0 11.4 96
HANSEN SAWMILL 8360 9.2 6.2 148 10.3 9.3 111
LITTLE GOOSE 8870 11.9 -M * 16.3 -M *
MIDDLE POWDER 7760 11.8 14.0 84 12.4 13.9 89
POWDER RIVER PASS 9480 17.5 11.9 147 20.2 13.8 146
SOLDIER PARK 8720 10.2 -M * 11.0 -M *
SUCKER CREEK 8880 15.3 13.5 113 16.9 15.2 111
TIE CREEK 6870 7.3 5.3 138 11.9 11.4 104
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Basin wide percent of average 118 111
BELLE FOURCHE
BLIND PARK 6890 9.5 7.6 125 18.2 12.3 148
COLE CANYON 5910 7.3 7.1 103 13.6 7.7 177
NORTH RAPID CREEK 6130 6.9 8.8 78 15.2 9.6 158
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Basin wide percent of average 101 159
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 27.6 17.7 156 35.8 21.5 167
COLUMBINE 9160 36.4 24.7 147 38.5 27.2 142
DIVIDE PEAK 8880 27.3 20.9 131 32.0 22.4 143
ELK RIVER 8700 27.1 19.6 138 29.4 21.2 139
JOE WRIGHT 10120 37.9 23.6 161 40.0 27.2 147
NORTH FRENCH CREEK 10130 52.6 32.6 161 -M 26.9 *
OLD BATTLE 10000 48.0 34.7 138 46.8 37.2 126
SAGE CREEK BASIN 7850 21.5 12.1 178 21.3 13.0 164
SOUTH BRUSH CREEK 8440 21.2 13.3 159 25.5 18.1 141
TOWER 10500 61.1 49.5 123 47.5 41.7 114
WEBBER SPRINGS 9250 34.2 26.1 131 39.9 28.9 138
WILLOW CREEK PASS 9540 22.8 13.6 168 20.3 14.1 144
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Basin wide percent of average 145 138
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 35.4 26.5 134 33.6 24.4 138
CASPER MTN. 7900 12.0 16.8 71 16.3 16.7 98
DEADMAN HILL 10220 24.0 18.3 131 24.8 18.7 133
DEER PARK 9700 20.9 17.1 122 24.4 24.1 101
LAPRELE CREEK 8375 13.7 10.2 134 15.8 14.2 111
RENO HILL 8400 16.4 15.9 103 19.5 17.3 113
ROACH 9700 22.5 18.4 122 25.9 20.4 127
SAND LAKE 10050 42.3 35.0 121 -M 26.5 *
SOUTH PASS 9040 18.6 17.7 105 16.2 20.4 79
WINDY PEAK 7900 10.8 8.0 135 14.9 11.8 126
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Basin wide percent of average 118 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 8.7 * 17.8 17.2 103
DIVIDE PEAK 8880 27.3 20.9 131 32.0 22.4 143
OLD BATTLE 10000 48.0 34.7 138 46.8 37.2 126
SANDSTONE RS 8150 20.8 13.4 155 -M 20.1 *
WHISKEY PARK 8950 -M 30.7 * -M 31.0 *
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Basin wide percent of average 139 126
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.6 15.3 115 17.7 14.5 122
BLIND BULL SUM 8650 38.6 28.9 134 26.2 23.8 110
EAST RIM DIVIDE 7930 17.4 14.0 124 15.4 12.9 119
ELKHART PARK G.S. 9400 16.2 14.0 116 15.9 14.5 110
GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 14.0 125
GUNSIGHT PASS 9820 21.6 -M * 20.0 -M *
KENDALL R.S. 7740 14.3 13.6 105 17.4 15.5 112
LOOMIS PARK 8240 23.2 17.1 136 23.9 18.7 128
NEW FORK LAKE 8340 14.3 11.3 127 13.0 12.3 106
POCKET CREEK 9360 15.0 -M * 16.7 -M *
SNIDER BASIN 8060 22.3 14.9 150 21.1 17.5 121
SPRING CREEK DIVIDE 9000 39.5 28.5 139 36.2 28.5 127
TRIPLE PEAK 8500 37.8 25.9 146 38.2 26.7 143
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Basin wide percent of average 131 122
LOWER GREEN RIVER
HAMS FORK 7840 17.0 10.0 170 16.8 13.4 125
HEWINTA 9519 14.6 12.3 119 19.5 16.2 120
HICKERSON PARK 9145 7.9 8.3 95 11.7 8.9 131
HOLE-IN-ROCK 9150 9.8 7.3 134 13.2 8.5 155
INDIAN CREEK 9425 35.4 29.6 120 30.1 27.6 109
KELLEY R.S. 8180 23.8 17.2 138 26.6 22.0 121
STEEL CREEK PARK 10200 20.4 17.3 118 23.0 18.3 126
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Basin wide percent of average 126 123
UPPER BEAR RIVER
BUG LAKE 7950 33.6 21.7 155 32.9 20.8 158
HAYDEN FORK 9212 26.8 16.5 162 33.4 23.1 145
KELLEY R.S. 8180 23.8 17.2 138 26.6 22.0 121
LILY LAKE 9156 24.5 14.5 169 25.4 19.4 131
MONTE CRISTO 8960 43.3 30.6 142 41.4 27.8 149
SALT RIVER SUMMIT 7760 19.4 14.4 135 24.3 20.3 120
TRIAL LAKE 9992 41.4 26.4 157 38.0 27.2 140
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Basin wide percent of average 151 138
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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.