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: MARCH 12 , 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 18.2 17.1 106 21.2 19.8 107
COTTONWOOD CREEK 7670 23.9 20.8 115 31.7 24.7 128
GRAND TARGHEE 9260 41.7 -M * -M -M *
GRANITE CREEK 6770 19.3 17.5 110 20.6 18.5 111
GRASSY LAKE 7265 34.1 32.1 106 36.1 33.0 109
GROS VENTRE SUMMIT 8750 13.5 12.6 107 13.0 11.6 112
GUNSIGHT PASS 9820 15.3 -M * 15.1 -M *
LEWIS LAKE DIVIDE 7850 33.6 32.1 105 -M 33.7 *
PHILLIPS BENCH 8200 27.2 26.0 105 27.8 26.4 105
SALT RIVER SUMMIT 7760 15.6 13.1 119 19.6 16.9 116
SNAKE RIVER STATION 6920 -M 17.9 * 23.3 20.6 113
SPRING CREEK DIVIDE 9000 30.6 23.9 128 29.4 24.0 123
THUMB DIVIDE 7980 18.4 17.0 108 17.8 17.2 103
TOGWOTEE PASS 9580 25.7 22.3 115 27.2 22.1 123
TWO OCEAN PLATEAU 9240 -M 25.1 * -M 25.1 *
WILLOW CREEK 8380 31.5 27.4 115 35.7 29.0 123
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Basin wide percent of average 111 115
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.3 21.5 104 21.3 18.3 116
BLACK BEAR 8170 38.9 35.9 108 37.3 36.1 103
CANYON 7870 14.9 12.4 120 15.9 13.9 114
FISHER CREEK 9100 35.5 31.9 111 34.3 32.9 104
MADISON PLATEAU 7750 24.3 22.8 107 26.3 23.8 111
NORTHEAST ENTRANCE 7350 12.2 10.5 116 13.5 11.5 117
PARKER PEAK 9400 25.3 19.6 129 -M 14.7 *
SYLVAN LAKE 8420 21.0 20.3 103 24.3 19.1 127
THUMB DIVIDE 7980 18.4 17.0 108 17.8 17.2 103
TWO OCEAN PLATEAU 9240 -M 25.1 * -M 25.1 *
WHISKEY CREEK 6800 17.7 15.7 113 20.1 18.8 107
WHITE MILL 8700 24.4 22.0 111 24.9 24.4 102
WOLVERINE 7650 13.2 11.3 117 13.1 11.8 111
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Basin wide percent of average 111 109
WIND RIVER
BURROUGHS CREEK 8750 13.7 13.5 101 14.3 14.7 97
CASTLE CREEK 8400 6.2 -M * 7.0 -M *
COLD SPRINGS 9630 7.7 7.9 97 7.3 9.0 81
DEER PARK 9700 16.7 15.4 108 19.6 19.4 101
HOBBS PARK 10100 12.9 13.0 99 11.2 10.7 105
LITTLE WARM 9370 10.9 10.4 105 11.0 11.7 94
SOUTH PASS 9040 15.8 15.3 103 13.8 16.1 86
ST. LAWRENCE ALT 8620 4.4 6.5 68 6.1 7.5 81
TOGWOTEE PASS 9580 25.7 22.3 115 27.2 22.1 123
TOWNSEND CREEK 8700 7.7 7.6 101 9.9 9.7 102
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Basin wide percent of average 103 100
BIGHORN BASIN
BALD MTN. 9380 20.0 17.3 116 16.5 15.2 109
BEAR TRAP MEADOW 8200 7.0 4.9 143 7.1 6.9 103
BLACKWATER 9780 22.9 22.1 104 22.3 18.4 121
BONE SPRINGS DIV 9350 16.7 14.2 118 13.8 12.6 110
EVENING STAR 9200 27.9 26.9 104 30.5 23.1 132
GRAVE SPRINGS 8550 7.4 8.0 93 7.5 8.5 88
KIRWIN 9550 10.1 10.0 101 11.1 9.9 112
MARQUETTE 8760 2.4 -M * 5.4 8.1 67
MIDDLE POWDER 7760 8.4 9.9 85 10.1 10.5 96
OWL CREEK 8975 5.1 4.6 111 5.1 4.8 106
POWDER RIVER PASS 9480 12.2 9.5 128 14.1 10.8 131
SHELL CREEK 9580 14.5 12.7 114 13.1 11.6 113
SYLVAN LAKE 8420 21.0 20.3 103 24.3 19.1 127
SYLVAN ROAD 7120 14.1 12.0 118 18.1 16.3 111
TIMBER CREEK 7950 3.4 4.7 72 4.2 6.0 70
YOUNTS PEAK 8350 15.6 15.6 100 13.5 14.5 93
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Basin wide percent of average 107 110
SHOSHONE RIVER
BLACKWATER 9780 22.9 22.1 104 22.3 18.4 121
EVENING STAR 9200 27.9 26.9 104 30.5 23.1 132
KIRWIN 9550 10.1 10.0 101 11.1 9.9 112
MARQUETTE 8760 2.4 -M * 5.4 8.1 67
SYLVAN LAKE 8420 21.0 20.3 103 24.3 19.1 127
SYLVAN ROAD 7120 14.1 12.0 118 18.1 16.3 111
YOUNTS PEAK 8350 15.6 15.6 100 13.5 14.5 93
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Basin wide percent of average 104 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.0 4.9 143 7.1 6.9 103
BIG GOOSE 7990 6.8 8.5 80 8.4 7.2 117
BONE SPRINGS DIV 9350 16.7 14.2 118 13.8 12.6 110
BURGESS JUNCTION 7880 9.4 9.8 96 10.2 10.3 99
CLOUD PEAK RESERVOIR 9860 13.6 11.2 121 12.2 10.7 114
DOME LAKE 8880 11.0 10.4 106 11.1 11.1 100
GRAVE SPRINGS 8550 7.4 8.0 93 7.5 8.5 88
HANSEN SAWMILL 8360 6.0 5.6 107 6.6 6.9 96
LITTLE GOOSE 8870 7.6 -M * 11.8 -M *
MIDDLE POWDER 7760 8.4 9.9 85 10.1 10.5 96
POWDER RIVER PASS 9480 12.2 9.5 128 14.1 10.8 131
SOLDIER PARK 8720 6.2 -M * 7.6 -M *
SUCKER CREEK 8880 11.1 10.0 111 12.2 11.4 107
TIE CREEK 6870 6.0 5.7 105 8.6 8.5 101
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Basin wide percent of average 107 106
BELLE FOURCHE
BLIND PARK 6890 9.5 8.1 117 15.2 9.9 154
COLE CANYON 5910 7.4 6.1 121 10.8 5.9 183
NORTH RAPID CREEK 6130 8.6 7.3 118 12.9 7.9 163
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Basin wide percent of average 119 164
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 22.0 16.8 131 22.2 18.2 122
COLUMBINE 9160 31.1 23.4 133 31.1 22.5 138
DIVIDE PEAK 8880 20.1 17.2 117 24.1 18.4 131
ELK RIVER 8700 22.5 17.4 129 23.7 17.4 136
JOE WRIGHT 10120 25.4 18.6 137 30.2 21.8 139
NORTH FRENCH CREEK 10130 39.1 24.9 157 32.2 21.8 148
OLD BATTLE 10000 37.5 28.6 131 28.9 30.8 94
SAGE CREEK BASIN 7850 18.6 10.0 186 16.6 10.7 155
SOUTH BRUSH CREEK 8440 16.6 11.3 147 19.5 14.3 136
TOWER 10500 48.9 40.4 121 45.9 34.4 133
WEBBER SPRINGS 9250 27.4 23.7 116 32.3 23.7 136
WILLOW CREEK PASS 9540 16.3 10.4 157 15.3 11.2 137
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Basin wide percent of average 134 131
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 27.8 20.6 135 27.8 19.0 146
CASPER MTN. 7900 10.2 12.2 84 12.8 12.1 106
DEADMAN HILL 10220 18.7 14.0 134 19.2 14.5 132
DEER PARK 9700 16.7 15.4 108 19.6 19.4 101
LAPRELE CREEK 8375 11.6 9.8 118 12.9 10.9 118
RENO HILL 8400 13.0 11.6 112 15.1 12.5 121
ROACH 9700 18.1 15.0 121 21.5 16.3 132
SAND LAKE 10050 32.8 27.9 118 31.3 20.9 150
SOUTH PASS 9040 15.8 15.3 103 13.8 16.1 86
WINDY PEAK 7900 9.8 6.9 142 12.1 9.1 133
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Basin wide percent of average 117 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 10.9 * -M 13.6 *
DIVIDE PEAK 8880 20.1 17.2 117 24.1 18.4 131
OLD BATTLE 10000 37.5 28.6 131 28.9 30.8 94
SANDSTONE RS 8150 14.0 13.9 101 22.8 16.9 135
WHISKEY PARK 8950 -M 26.5 * 35.6 25.3 141
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Basin wide percent of average 120 122
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.3 13.1 102 13.4 12.1 111
BLIND BULL SUM 8650 26.8 25.2 106 19.4 20.2 96
EAST RIM DIVIDE 7930 13.9 11.9 117 12.0 11.0 109
ELKHART PARK G.S. 9400 11.9 12.1 98 11.9 11.8 101
GROS VENTRE SUMMIT 8750 13.5 12.6 107 13.0 11.6 112
GUNSIGHT PASS 9820 15.3 -M * 15.1 -M *
KENDALL R.S. 7740 12.5 13.6 92 13.9 13.4 104
LOOMIS PARK 8240 18.5 15.9 116 18.8 15.9 118
NEW FORK LAKE 8340 11.7 10.3 114 10.8 10.3 105
POCKET CREEK 9360 10.5 -M * 12.9 -M *
SNIDER BASIN 8060 18.7 13.4 140 17.8 14.6 122
SPRING CREEK DIVIDE 9000 30.6 23.9 128 29.4 24.0 123
TRIPLE PEAK 8500 27.3 22.6 121 29.4 22.3 132
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Basin wide percent of average 114 114
LOWER GREEN RIVER
HAMS FORK 7840 15.6 12.0 130 14.3 11.1 129
HEWINTA 9519 11.3 10.1 112 14.6 12.6 116
HICKERSON PARK 9145 7.2 6.3 114 8.5 6.8 125
HOLE-IN-ROCK 9150 7.3 6.2 118 8.9 6.3 141
INDIAN CREEK 9425 28.1 24.5 115 25.1 22.7 111
KELLEY R.S. 8180 18.9 15.3 124 21.9 18.3 120
STEEL CREEK PARK 10200 14.9 13.8 108 17.4 14.0 124
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Basin wide percent of average 117 121
UPPER BEAR RIVER
BUG LAKE 7950 26.4 18.7 141 26.3 17.3 152
HAYDEN FORK 9212 20.5 14.5 141 26.1 18.5 141
KELLEY R.S. 8180 18.9 15.3 124 21.9 18.3 120
LILY LAKE 9156 18.0 11.7 154 19.2 15.3 125
MONTE CRISTO 8960 33.0 27.0 122 33.0 22.8 145
SALT RIVER SUMMIT 7760 15.6 13.1 119 19.6 16.9 116
TRIAL LAKE 9992 31.6 22.5 140 30.6 22.3 137
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Basin wide percent of average 134 134
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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.