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: MARCH 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 18.3 17.2 106 21.2 19.9 107
COTTONWOOD CREEK 7670 23.9 21.0 114 31.7 24.8 128
GRAND TARGHEE 9260 41.7 -M * -M -M *
GRANITE CREEK 6770 19.3 17.7 109 20.6 18.6 111
GRASSY LAKE 7265 34.1 32.3 106 36.1 33.2 109
GROS VENTRE SUMMIT 8750 13.5 12.7 106 13.0 11.7 111
GUNSIGHT PASS 9820 15.4 -M * 15.1 -M *
LEWIS LAKE DIVIDE 7850 33.5 32.4 103 -M 33.9 *
PHILLIPS BENCH 8200 27.2 26.2 104 27.9 26.6 105
SALT RIVER SUMMIT 7760 15.5 13.2 117 19.6 17.0 115
SNAKE RIVER STATION 6920 -M 18.1 * 23.3 20.7 113
SPRING CREEK DIVIDE 9000 30.6 24.1 127 29.4 24.1 122
THUMB DIVIDE 7980 18.5 17.2 108 17.8 17.3 103
TOGWOTEE PASS 9580 25.7 22.5 114 27.2 22.3 122
TWO OCEAN PLATEAU 9240 -M 25.2 * -M 25.3 *
WILLOW CREEK 8380 31.6 27.6 114 35.7 29.2 122
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Basin wide percent of average 110 114
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.2 21.6 103 21.3 18.4 116
BLACK BEAR 8170 38.9 36.0 108 37.3 36.4 102
CANYON 7870 14.9 12.5 119 15.9 14.0 114
FISHER CREEK 9100 35.5 32.0 111 34.3 33.1 104
MADISON PLATEAU 7750 24.3 22.9 106 26.4 24.0 110
NORTHEAST ENTRANCE 7350 12.2 10.5 116 13.5 11.6 116
PARKER PEAK 9400 25.3 19.7 128 -M 14.7 *
SYLVAN LAKE 8420 20.9 20.4 102 24.3 19.2 127
THUMB DIVIDE 7980 18.5 17.2 108 17.8 17.3 103
TWO OCEAN PLATEAU 9240 -M 25.2 * -M 25.3 *
WHISKEY CREEK 6800 17.7 15.8 112 20.2 18.9 107
WHITE MILL 8700 24.4 22.1 110 24.9 24.5 102
WOLVERINE 7650 13.2 11.3 117 13.1 11.9 110
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Basin wide percent of average 111 109
WIND RIVER
BURROUGHS CREEK 8750 13.7 13.5 101 14.3 14.8 97
CASTLE CREEK 8400 6.4 -M * 6.9 -M *
COLD SPRINGS 9630 7.7 8.0 96 7.4 9.1 81
DEER PARK 9700 16.7 15.4 108 19.6 19.6 100
HOBBS PARK 10100 12.8 13.0 98 11.2 10.8 104
LITTLE WARM 9370 10.9 10.5 104 11.1 11.8 94
SOUTH PASS 9040 15.8 15.3 103 13.9 16.2 86
ST. LAWRENCE ALT 8620 4.3 6.5 66 6.1 7.6 80
TOGWOTEE PASS 9580 25.7 22.5 114 27.2 22.3 122
TOWNSEND CREEK 8700 7.7 7.6 101 9.8 9.7 101
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Basin wide percent of average 103 99
BIGHORN BASIN
BALD MTN. 9380 20.0 17.4 115 16.5 15.3 108
BEAR TRAP MEADOW 8200 7.0 4.9 143 7.1 7.0 101
BLACKWATER 9780 22.9 22.2 103 22.4 18.5 121
BONE SPRINGS DIV 9350 16.7 14.2 118 13.8 12.7 109
EVENING STAR 9200 27.9 27.0 103 30.5 23.2 131
GRAVE SPRINGS 8550 7.4 8.2 90 7.5 8.6 87
KIRWIN 9550 10.0 10.0 100 11.1 9.9 112
MARQUETTE 8760 2.4 -M * 5.5 8.2 67
MIDDLE POWDER 7760 8.4 10.0 84 10.1 10.5 96
OWL CREEK 8975 5.2 4.6 113 5.1 4.8 106
POWDER RIVER PASS 9480 12.1 9.6 126 14.2 10.8 131
SHELL CREEK 9580 14.5 12.8 113 13.1 11.7 112
SYLVAN LAKE 8420 20.9 20.4 102 24.3 19.2 127
SYLVAN ROAD 7120 14.1 12.0 118 18.2 16.4 111
TIMBER CREEK 7950 3.4 4.8 71 4.2 6.0 70
YOUNTS PEAK 8350 15.5 15.6 99 13.5 14.6 92
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Basin wide percent of average 106 110
SHOSHONE RIVER
BLACKWATER 9780 22.9 22.2 103 22.4 18.5 121
EVENING STAR 9200 27.9 27.0 103 30.5 23.2 131
KIRWIN 9550 10.0 10.0 100 11.1 9.9 112
MARQUETTE 8760 2.4 -M * 5.5 8.2 67
SYLVAN LAKE 8420 20.9 20.4 102 24.3 19.2 127
SYLVAN ROAD 7120 14.1 12.0 118 18.2 16.4 111
YOUNTS PEAK 8350 15.5 15.6 99 13.5 14.6 92
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Basin wide percent of average 104 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.0 4.9 143 7.1 7.0 101
BIG GOOSE 7990 6.8 8.5 80 8.4 7.3 115
BONE SPRINGS DIV 9350 16.7 14.2 118 13.8 12.7 109
BURGESS JUNCTION 7880 9.4 9.9 95 10.2 10.4 98
CLOUD PEAK RESERVOIR 9860 13.6 11.3 120 12.2 10.8 113
DOME LAKE 8880 11.1 10.4 107 11.1 11.1 100
GRAVE SPRINGS 8550 7.4 8.2 90 7.5 8.6 87
HANSEN SAWMILL 8360 6.0 5.7 105 6.6 6.9 96
LITTLE GOOSE 8870 7.6 -M * 11.8 -M *
MIDDLE POWDER 7760 8.4 10.0 84 10.1 10.5 96
POWDER RIVER PASS 9480 12.1 9.6 126 14.2 10.8 131
SOLDIER PARK 8720 6.3 -M * 7.6 -M *
SUCKER CREEK 8880 11.1 10.1 110 12.2 11.5 106
TIE CREEK 6870 5.9 5.7 104 8.5 8.5 100
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Basin wide percent of average 106 105
BELLE FOURCHE
BLIND PARK 6890 9.5 8.3 114 15.2 10.0 152
COLE CANYON 5910 7.5 6.2 121 10.8 5.9 183
NORTH RAPID CREEK 6130 8.6 7.4 116 12.8 7.9 162
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Basin wide percent of average 117 163
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 22.4 16.9 133 22.2 18.3 121
COLUMBINE 9160 31.2 23.6 132 31.3 22.7 138
DIVIDE PEAK 8880 20.5 17.3 118 24.5 18.5 132
ELK RIVER 8700 22.7 17.5 130 24.1 17.5 138
JOE WRIGHT 10120 25.9 18.8 138 30.6 21.9 140
NORTH FRENCH CREEK 10130 39.8 25.1 159 32.2 22.0 146
OLD BATTLE 10000 37.9 28.8 132 29.0 31.0 94
SAGE CREEK BASIN 7850 18.8 10.0 188 16.7 10.8 155
SOUTH BRUSH CREEK 8440 17.1 11.4 150 20.0 14.4 139
TOWER 10500 49.2 40.7 121 46.0 34.6 133
WEBBER SPRINGS 9250 27.7 23.9 116 32.7 23.9 137
WILLOW CREEK PASS 9540 16.6 10.5 158 15.4 11.3 136
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Basin wide percent of average 135 132
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.2 20.7 136 28.0 19.2 146
CASPER MTN. 7900 10.3 12.3 84 12.7 12.2 104
DEADMAN HILL 10220 19.0 14.2 134 19.6 14.7 133
DEER PARK 9700 16.7 15.4 108 19.6 19.6 100
LAPRELE CREEK 8375 11.7 9.8 119 12.9 11.0 117
RENO HILL 8400 13.0 11.7 111 15.1 12.6 120
ROACH 9700 18.4 15.1 122 21.8 16.4 133
SAND LAKE 10050 33.3 28.2 118 31.8 21.1 151
SOUTH PASS 9040 15.8 15.3 103 13.9 16.2 86
WINDY PEAK 7900 9.8 7.0 140 12.1 9.2 132
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Basin wide percent of average 118 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 11.0 * -M 13.7 *
DIVIDE PEAK 8880 20.5 17.3 118 24.5 18.5 132
OLD BATTLE 10000 37.9 28.8 132 29.0 31.0 94
SANDSTONE RS 8150 14.3 14.0 102 23.1 17.0 136
WHISKEY PARK 8950 -M 26.8 * 35.8 25.5 140
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Basin wide percent of average 121 122
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.3 13.1 102 13.5 12.2 111
BLIND BULL SUM 8650 26.8 25.3 106 19.4 20.3 96
EAST RIM DIVIDE 7930 13.9 12.0 116 11.9 11.0 108
ELKHART PARK G.S. 9400 11.9 12.1 98 11.9 11.9 100
GROS VENTRE SUMMIT 8750 13.5 12.7 106 13.0 11.7 111
GUNSIGHT PASS 9820 15.4 -M * 15.1 -M *
KENDALL R.S. 7740 12.5 13.7 91 13.9 13.5 103
LOOMIS PARK 8240 18.5 16.0 116 18.8 16.0 118
NEW FORK LAKE 8340 11.7 10.4 113 10.7 10.3 104
POCKET CREEK 9360 10.5 -M * 12.9 -M *
SNIDER BASIN 8060 18.7 13.5 139 17.7 14.7 120
SPRING CREEK DIVIDE 9000 30.6 24.1 127 29.4 24.1 122
TRIPLE PEAK 8500 27.2 22.7 120 29.4 22.5 131
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Basin wide percent of average 113 113
LOWER GREEN RIVER
HAMS FORK 7840 15.7 12.1 130 14.3 11.1 129
HEWINTA 9519 12.1 10.2 119 15.5 12.7 122
HICKERSON PARK 9145 7.7 6.4 120 9.2 6.8 135
HOLE-IN-ROCK 9150 7.8 6.3 124 9.6 6.4 150
INDIAN CREEK 9425 27.9 24.7 113 25.1 22.8 110
KELLEY R.S. 8180 18.8 15.4 122 21.9 18.4 119
STEEL CREEK PARK 10200 15.6 14.0 111 18.2 14.1 129
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Basin wide percent of average 119 123
UPPER BEAR RIVER
BUG LAKE 7950 26.3 18.8 140 26.3 17.4 151
HAYDEN FORK 9212 20.7 14.6 142 26.5 18.6 142
KELLEY R.S. 8180 18.8 15.4 122 21.9 18.4 119
LILY LAKE 9156 19.0 11.8 161 20.0 15.4 130
MONTE CRISTO 8960 33.3 27.2 122 33.0 22.9 144
SALT RIVER SUMMIT 7760 15.5 13.2 117 19.6 17.0 115
TRIAL LAKE 9992 31.9 22.7 141 30.6 22.4 137
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Basin wide percent of average 134 135
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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.