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 13 , 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 25.0 17.2 145 27.7 22.8 121
COTTONWOOD CREEK 7670 32.3 24.0 135 39.1 29.5 133
GRAND TARGHEE 9260 53.5 -M * 40.4 -M *
GRANITE CREEK 6770 24.8 17.3 143 27.0 21.0 129
GRASSY LAKE 7265 44.4 37.1 120 45.7 38.2 120
GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 13.9 126
GUNSIGHT PASS 9820 21.3 -M * 19.7 -M *
LEWIS LAKE DIVIDE 7850 47.0 36.7 128 -M 39.1 *
PHILLIPS BENCH 8200 37.0 30.5 121 36.8 30.9 119
SALT RIVER SUMMIT 7760 19.3 14.6 132 24.2 20.1 120
SNAKE RIVER STATION 6920 -M 17.9 * 29.6 23.8 124
SPRING CREEK DIVIDE 9000 39.3 28.4 138 36.0 28.3 127
THUMB DIVIDE 7980 25.3 18.9 134 23.1 20.3 114
TOGWOTEE PASS 9580 33.8 26.5 128 35.0 26.5 132
TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 *
WILLOW CREEK 8380 42.2 31.8 133 45.8 34.6 132
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Basin wide percent of average 130 125
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 30.3 25.3 120 29.1 21.6 135
BLACK BEAR 8170 51.7 40.8 127 49.7 43.0 116
CANYON 7870 19.7 14.1 140 21.2 16.5 128
FISHER CREEK 9100 46.6 36.9 126 44.2 38.8 114
MADISON PLATEAU 7750 33.7 26.2 129 35.6 28.7 124
NORTHEAST ENTRANCE 7350 16.1 10.9 148 17.8 13.6 131
PARKER PEAK 9400 33.7 23.3 145 29.1 17.6 165
SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142
THUMB DIVIDE 7980 25.3 18.9 134 23.1 20.3 114
TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 *
WHISKEY CREEK 6800 22.8 17.8 128 26.0 22.5 116
WHITE MILL 8700 32.5 25.9 125 32.6 28.9 113
WOLVERINE 7650 16.7 11.4 146 16.7 13.8 121
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Basin wide percent of average 130 124
WIND RIVER
BURROUGHS CREEK 8750 18.9 15.2 124 19.7 17.5 113
CASTLE CREEK 8400 7.8 -M * 9.6 -M *
COLD SPRINGS 9630 9.8 7.6 129 10.8 11.9 91
DEER PARK 9700 20.7 16.8 123 24.2 23.9 101
HOBBS PARK 10100 18.0 16.8 107 15.9 14.4 110
LITTLE WARM 9370 14.4 12.6 114 14.9 14.6 102
SOUTH PASS 9040 18.4 17.7 104 16.1 20.1 80
ST. LAWRENCE ALT 8620 6.0 7.5 80 9.4 10.0 94
TOGWOTEE PASS 9580 33.8 26.5 128 35.0 26.5 132
TOWNSEND CREEK 8700 9.9 9.8 101 12.9 13.1 98
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Basin wide percent of average 115 105
BIGHORN BASIN
BALD MTN. 9380 26.5 21.6 123 21.5 18.9 114
BEAR TRAP MEADOW 8200 9.5 4.8 198 9.6 9.2 104
BLACKWATER 9780 31.4 26.6 118 29.9 22.4 133
BONE SPRINGS DIV 9350 22.8 17.5 130 18.7 16.0 117
EVENING STAR 9200 37.3 31.9 117 39.4 27.3 144
GRAVE SPRINGS 8550 9.9 10.5 94 10.2 11.1 92
KIRWIN 9550 15.0 12.3 122 15.9 12.3 129
MARQUETTE 8760 5.1 -M * 8.1 11.2 72
MIDDLE POWDER 7760 11.0 13.8 80 12.0 13.6 88
OWL CREEK 8975 7.2 5.4 133 7.6 6.7 113
POWDER RIVER PASS 9480 17.0 11.8 144 19.7 13.6 145
SHELL CREEK 9580 19.7 16.0 123 17.8 14.6 122
SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142
SYLVAN ROAD 7120 18.0 12.5 144 23.8 18.8 127
TIMBER CREEK 7950 6.1 5.7 107 7.3 8.4 87
YOUNTS PEAK 8350 21.3 18.0 118 18.7 17.3 108
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Basin wide percent of average 121 120
SHOSHONE RIVER
BLACKWATER 9780 31.4 26.6 118 29.9 22.4 133
EVENING STAR 9200 37.3 31.9 117 39.4 27.3 144
KIRWIN 9550 15.0 12.3 122 15.9 12.3 129
MARQUETTE 8760 5.1 -M * 8.1 11.2 72
SYLVAN LAKE 8420 28.6 24.1 119 31.9 22.5 142
SYLVAN ROAD 7120 18.0 12.5 144 23.8 18.8 127
YOUNTS PEAK 8350 21.3 18.0 118 18.7 17.3 108
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Basin wide percent of average 121 127
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.5 4.8 198 9.6 9.2 104
BIG GOOSE 7990 10.2 12.2 84 11.9 10.2 117
BONE SPRINGS DIV 9350 22.8 17.5 130 18.7 16.0 117
BURGESS JUNCTION 7880 12.7 13.1 97 13.5 13.4 101
CLOUD PEAK RESERVOIR 9860 18.6 15.0 124 17.5 14.4 122
DOME LAKE 8880 15.8 13.9 114 15.1 14.5 104
GRAVE SPRINGS 8550 9.9 10.5 94 10.2 11.1 92
HANSEN SAWMILL 8360 8.5 6.3 135 9.6 9.2 104
LITTLE GOOSE 8870 11.6 -M * 16.1 -M *
MIDDLE POWDER 7760 11.0 13.8 80 12.0 13.6 88
POWDER RIVER PASS 9480 17.0 11.8 144 19.7 13.6 145
SOLDIER PARK 8720 9.7 -M * 10.6 -M *
SUCKER CREEK 8880 15.2 13.4 113 16.8 15.0 112
TIE CREEK 6870 7.2 5.4 133 11.9 11.2 106
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Basin wide percent of average 115 110
BELLE FOURCHE
BLIND PARK 6890 9.1 7.9 115 17.7 12.1 146
COLE CANYON 5910 7.1 7.2 99 13.2 7.5 176
NORTH RAPID CREEK 6130 6.6 8.9 74 14.8 9.4 157
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Basin wide percent of average 95 158
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 27.2 17.8 153 35.3 21.3 166
COLUMBINE 9160 35.7 24.8 144 38.0 26.9 141
DIVIDE PEAK 8880 26.9 20.8 129 31.6 22.2 142
ELK RIVER 8700 27.1 19.9 136 29.2 21.0 139
JOE WRIGHT 10120 36.1 23.3 155 38.7 26.9 144
NORTH FRENCH CREEK 10130 51.4 32.2 160 -M 26.6 *
OLD BATTLE 10000 47.9 34.4 139 46.7 36.8 127
SAGE CREEK BASIN 7850 22.0 12.1 182 21.2 12.9 164
SOUTH BRUSH CREEK 8440 20.5 13.4 153 24.6 17.9 137
TOWER 10500 60.4 49.1 123 47.5 41.2 115
WEBBER SPRINGS 9250 34.1 26.2 130 39.6 28.6 138
WILLOW CREEK PASS 9540 22.0 13.4 164 19.8 14.0 141
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Basin wide percent of average 143 138
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 34.7 26.1 133 33.5 24.1 139
CASPER MTN. 7900 11.9 16.5 72 15.8 16.3 97
DEADMAN HILL 10220 22.7 18.1 125 23.8 18.5 129
DEER PARK 9700 20.7 16.8 123 24.2 23.9 101
LAPRELE CREEK 8375 13.9 10.5 132 15.7 14.0 112
RENO HILL 8400 16.0 15.8 101 19.1 17.0 112
ROACH 9700 22.1 18.3 121 25.5 20.1 127
SAND LAKE 10050 41.4 34.7 119 -M 26.2 *
SOUTH PASS 9040 18.4 17.7 104 16.1 20.1 80
WINDY PEAK 7900 10.7 8.2 130 14.7 11.6 127
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Basin wide percent of average 116 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 9.1 * 17.4 17.0 102
DIVIDE PEAK 8880 26.9 20.8 129 31.6 22.2 142
OLD BATTLE 10000 47.9 34.4 139 46.7 36.8 127
SANDSTONE RS 8150 20.5 13.7 150 -M 19.9 *
WHISKEY PARK 8950 -M 30.7 * -M 30.7 *
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Basin wide percent of average 138 126
UPPER GREEN RIVER
BIG SANDY OPENING 9080 17.5 15.3 114 17.6 14.4 122
BLIND BULL SUM 8650 38.3 28.9 133 26.1 23.6 111
EAST RIM DIVIDE 7930 17.6 13.9 127 15.3 12.8 120
ELKHART PARK G.S. 9400 16.0 14.0 114 15.7 14.4 109
GROS VENTRE SUMMIT 8750 17.4 14.6 119 17.5 13.9 126
GUNSIGHT PASS 9820 21.3 -M * 19.7 -M *
KENDALL R.S. 7740 14.7 13.8 107 17.3 15.4 112
LOOMIS PARK 8240 23.6 17.2 137 23.7 18.5 128
NEW FORK LAKE 8340 14.3 11.4 125 12.9 12.2 106
POCKET CREEK 9360 14.7 -M * 16.5 -M *
SNIDER BASIN 8060 22.4 15.0 149 21.0 17.3 121
SPRING CREEK DIVIDE 9000 39.3 28.4 138 36.0 28.3 127
TRIPLE PEAK 8500 37.7 25.9 146 38.0 26.5 143
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Basin wide percent of average 130 122
LOWER GREEN RIVER
HAMS FORK 7840 17.2 10.3 167 16.7 13.2 127
HEWINTA 9519 14.1 12.4 114 19.2 16.0 120
HICKERSON PARK 9145 7.8 8.4 93 11.7 8.8 133
HOLE-IN-ROCK 9150 9.7 7.4 131 13.1 8.3 158
INDIAN CREEK 9425 35.5 29.5 120 30.0 27.4 109
KELLEY R.S. 8180 23.8 17.3 138 26.5 21.9 121
STEEL CREEK PARK 10200 20.0 17.1 117 22.6 18.0 126
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Basin wide percent of average 125 123
UPPER BEAR RIVER
BUG LAKE 7950 33.5 21.8 154 32.7 20.6 159
HAYDEN FORK 9212 26.7 16.7 160 32.9 22.8 144
KELLEY R.S. 8180 23.8 17.3 138 26.5 21.9 121
LILY LAKE 9156 24.4 14.6 167 25.1 19.1 131
MONTE CRISTO 8960 42.9 30.6 140 41.0 27.5 149
SALT RIVER SUMMIT 7760 19.3 14.6 132 24.2 20.1 120
TRIAL LAKE 9992 41.0 26.3 156 37.6 26.9 140
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Basin wide percent of average 149 138
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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.