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: APRIL 17 , 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 25.1 16.4 153 28.5 23.1 123
COTTONWOOD CREEK 7670 34.2 23.5 146 40.6 30.0 135
GRAND TARGHEE 9260 56.9 -M * 42.7 -M *
GRANITE CREEK 6770 25.4 16.6 153 27.8 21.2 131
GRASSY LAKE 7265 45.8 36.9 124 47.7 38.8 123
GROS VENTRE SUMMIT 8750 17.8 14.6 122 17.9 14.2 126
GUNSIGHT PASS 9820 22.0 -M * 20.5 -M *
LEWIS LAKE DIVIDE 7850 49.6 36.7 135 -M 39.7 *
PHILLIPS BENCH 8200 38.0 30.7 124 38.2 31.4 122
SALT RIVER SUMMIT 7760 19.6 14.1 139 24.8 20.5 121
SNAKE RIVER STATION 6920 -M 17.0 * 30.8 24.2 127
SPRING CREEK DIVIDE 9000 40.7 28.7 142 37.0 28.7 129
THUMB DIVIDE 7980 25.9 18.4 141 23.7 20.6 115
TOGWOTEE PASS 9580 35.2 26.9 131 36.5 27.1 135
TWO OCEAN PLATEAU 9240 -M 30.8 * -M 30.2 *
WILLOW CREEK 8380 43.7 31.9 137 47.4 35.2 135
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Basin wide percent of average 136 127
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 30.8 25.5 121 29.4 22.0 134
BLACK BEAR 8170 52.9 41.1 129 51.1 43.7 117
CANYON 7870 19.9 13.6 146 21.5 16.7 129
FISHER CREEK 9100 -M 37.1 * -M 39.5 *
MADISON PLATEAU 7750 34.5 26.0 133 36.5 29.1 125
NORTHEAST ENTRANCE 7350 16.2 10.3 157 18.1 13.8 131
PARKER PEAK 9400 34.5 23.5 147 -M 18.0 *
SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143
THUMB DIVIDE 7980 25.9 18.4 141 23.7 20.6 115
TWO OCEAN PLATEAU 9240 -M 30.8 * -M 30.2 *
WHISKEY CREEK 6800 23.2 17.7 131 26.6 22.8 117
WHITE MILL 8700 33.3 26.1 128 33.2 29.4 113
WOLVERINE 7650 17.0 10.7 159 17.0 14.1 121
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Basin wide percent of average 134 123
WIND RIVER
BURROUGHS CREEK 8750 19.5 15.1 129 20.3 17.9 113
CASTLE CREEK 8400 7.8 -M * 10.0 -M *
COLD SPRINGS 9630 9.9 6.6 150 11.2 12.3 91
DEER PARK 9700 20.8 17.6 118 24.5 24.5 100
HOBBS PARK 10100 18.1 16.9 107 16.2 15.0 108
LITTLE WARM 9370 14.7 12.4 119 15.3 15.1 101
SOUTH PASS 9040 18.6 17.7 105 16.3 20.7 79
ST. LAWRENCE ALT 8620 6.0 7.1 85 9.6 10.4 92
TOGWOTEE PASS 9580 35.2 26.9 131 36.5 27.1 135
TOWNSEND CREEK 8700 10.0 9.7 103 13.0 13.7 95
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Basin wide percent of average 118 104
BIGHORN BASIN
BALD MTN. 9380 27.8 22.0 126 22.7 19.4 117
BEAR TRAP MEADOW 8200 10.1 4.4 230 10.4 9.6 108
BLACKWATER 9780 32.6 27.0 121 31.0 22.9 135
BONE SPRINGS DIV 9350 23.4 17.7 132 19.1 16.5 116
EVENING STAR 9200 38.6 32.2 120 -M 27.9 *
GRAVE SPRINGS 8550 10.7 10.8 99 11.0 11.6 95
KIRWIN 9550 15.8 12.4 127 16.6 12.7 131
MARQUETTE 8760 5.7 -M * 8.7 11.7 74
MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.1 89
OWL CREEK 8975 7.7 5.1 151 8.4 7.0 120
POWDER RIVER PASS 9480 17.2 11.8 146 20.4 14.1 145
SHELL CREEK 9580 20.3 16.2 125 18.3 15.1 121
SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143
SYLVAN ROAD 7120 17.7 11.6 153 24.4 19.2 127
TIMBER CREEK 7950 6.3 5.6 113 7.6 8.8 86
YOUNTS PEAK 8350 21.9 18.2 120 19.2 17.6 109
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Basin wide percent of average 125 118
SHOSHONE RIVER
BLACKWATER 9780 32.6 27.0 121 31.0 22.9 135
EVENING STAR 9200 38.6 32.2 120 -M 27.9 *
KIRWIN 9550 15.8 12.4 127 16.6 12.7 131
MARQUETTE 8760 5.7 -M * 8.7 11.7 74
SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143
SYLVAN ROAD 7120 17.7 11.6 153 24.4 19.2 127
YOUNTS PEAK 8350 21.9 18.2 120 19.2 17.6 109
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Basin wide percent of average 124 124
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.1 4.4 230 10.4 9.6 108
BIG GOOSE 7990 10.4 12.5 83 12.2 10.9 112
BONE SPRINGS DIV 9350 23.4 17.7 132 19.1 16.5 116
BURGESS JUNCTION 7880 13.1 13.2 99 14.0 13.8 101
CLOUD PEAK RESERVOIR 9860 19.0 15.4 123 18.0 15.0 120
DOME LAKE 8880 16.0 13.9 115 15.4 15.0 103
GRAVE SPRINGS 8550 10.7 10.8 99 11.0 11.6 95
HANSEN SAWMILL 8360 9.1 6.0 152 10.2 9.5 107
LITTLE GOOSE 8870 11.9 -M * 16.4 -M *
MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.1 89
POWDER RIVER PASS 9480 17.2 11.8 146 20.4 14.1 145
SOLDIER PARK 8720 10.1 -M * 11.1 -M *
SUCKER CREEK 8880 15.4 13.4 115 17.0 15.5 110
TIE CREEK 6870 7.3 5.4 135 12.1 11.7 103
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Basin wide percent of average 118 110
BELLE FOURCHE
BLIND PARK 6890 9.5 7.4 128 18.1 12.6 144
COLE CANYON 5910 7.3 7.0 104 13.6 7.8 174
NORTH RAPID CREEK 6130 6.6 8.6 77 15.2 9.7 157
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Basin wide percent of average 102 156
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 28.6 17.6 163 36.9 21.8 169
COLUMBINE 9160 36.6 24.4 150 38.9 27.5 141
DIVIDE PEAK 8880 28.0 20.9 134 32.5 22.6 144
ELK RIVER 8700 27.2 19.3 141 29.7 21.5 138
JOE WRIGHT 10120 38.3 23.9 160 40.3 27.6 146
NORTH FRENCH CREEK 10130 55.1 32.9 167 -M 27.2 *
OLD BATTLE 10000 49.5 35.0 141 46.9 37.5 125
SAGE CREEK BASIN 7850 21.6 12.1 179 21.6 13.1 165
SOUTH BRUSH CREEK 8440 21.9 13.2 166 26.1 18.3 143
TOWER 10500 62.3 50.0 125 47.6 42.1 113
WEBBER SPRINGS 9250 34.9 26.1 134 40.4 29.2 138
WILLOW CREEK PASS 9540 22.9 13.8 166 20.4 14.3 143
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Basin wide percent of average 148 138
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 36.9 26.8 138 33.6 24.7 136
CASPER MTN. 7900 12.1 17.0 71 16.3 17.0 96
DEADMAN HILL 10220 24.7 18.6 133 25.1 19.0 132
DEER PARK 9700 20.8 17.6 118 24.5 24.5 100
LAPRELE CREEK 8375 13.6 10.0 136 16.0 14.5 110
RENO HILL 8400 16.6 16.0 104 19.7 17.6 112
ROACH 9700 23.0 18.4 125 26.3 20.6 128
SAND LAKE 10050 43.9 35.3 124 -M 26.9 *
SOUTH PASS 9040 18.6 17.7 105 16.3 20.7 79
WINDY PEAK 7900 10.8 7.7 140 14.9 12.0 124
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Basin wide percent of average 119 113
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 8.2 * 18.0 17.4 103
DIVIDE PEAK 8880 28.0 20.9 134 32.5 22.6 144
OLD BATTLE 10000 49.5 35.0 141 46.9 37.5 125
SANDSTONE RS 8150 20.9 13.1 160 -M 20.3 *
WHISKEY PARK 8950 -M 30.6 * -M 31.4 *
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Basin wide percent of average 143 126
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.7 15.3 116 18.0 14.7 122
BLIND BULL SUM 8650 40.1 28.9 139 26.9 24.0 112
EAST RIM DIVIDE 7930 17.4 14.0 124 15.8 13.0 122
ELKHART PARK G.S. 9400 16.5 14.0 118 16.3 14.7 111
GROS VENTRE SUMMIT 8750 17.8 14.6 122 17.9 14.2 126
GUNSIGHT PASS 9820 22.0 -M * 20.5 -M *
KENDALL R.S. 7740 14.3 13.3 108 17.8 15.6 114
LOOMIS PARK 8240 23.5 16.9 139 24.3 18.8 129
NEW FORK LAKE 8340 14.3 11.1 129 13.3 12.4 107
POCKET CREEK 9360 15.3 -M * 17.0 -M *
SNIDER BASIN 8060 22.7 14.8 153 21.4 17.6 122
SPRING CREEK DIVIDE 9000 40.7 28.7 142 37.0 28.7 129
TRIPLE PEAK 8500 38.9 25.9 150 39.1 27.0 145
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Basin wide percent of average 134 123
LOWER GREEN RIVER
HAMS FORK 7840 15.9 9.6 166 17.0 13.5 126
HEWINTA 9519 14.4 12.1 119 19.7 16.4 120
HICKERSON PARK 9145 7.4 8.1 91 11.9 9.1 131
HOLE-IN-ROCK 9150 9.7 7.1 137 13.3 8.6 155
INDIAN CREEK 9425 36.1 29.6 122 30.5 27.9 109
KELLEY R.S. 8180 23.9 17.0 141 26.9 22.2 121
STEEL CREEK PARK 10200 20.7 17.5 118 23.1 18.6 124
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Basin wide percent of average 127 122
UPPER BEAR RIVER
BUG LAKE 7950 34.0 21.5 158 33.3 21.0 159
HAYDEN FORK 9212 26.8 16.3 164 33.5 23.3 144
KELLEY R.S. 8180 23.9 17.0 141 26.9 22.2 121
LILY LAKE 9156 24.8 14.3 173 25.4 19.6 130
MONTE CRISTO 8960 43.6 30.5 143 41.8 28.1 149
SALT RIVER SUMMIT 7760 19.6 14.1 139 24.8 20.5 121
TRIAL LAKE 9992 41.9 26.5 158 38.1 27.5 139
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Basin wide percent of average 153 138
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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.