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: MARCH 16 , 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 18.5 17.4 106 21.4 20.2 106
COTTONWOOD CREEK 7670 24.3 21.7 112 32.1 25.3 127
GRAND TARGHEE 9260 42.6 -M * -M -M *
GRANITE CREEK 6770 19.6 18.0 109 20.7 18.9 110
GRASSY LAKE 7265 34.9 33.0 106 36.8 33.8 109
GROS VENTRE SUMMIT 8750 13.7 13.0 105 13.1 11.9 110
GUNSIGHT PASS 9820 15.4 -M * 15.2 -M *
LEWIS LAKE DIVIDE 7850 35.0 33.0 106 -M 34.5 *
PHILLIPS BENCH 8200 27.8 26.7 104 28.3 27.0 105
SALT RIVER SUMMIT 7760 15.8 13.4 118 19.9 17.3 115
SNAKE RIVER STATION 6920 -M 18.4 * 23.8 21.0 113
SPRING CREEK DIVIDE 9000 31.3 24.6 127 29.7 24.5 121
THUMB DIVIDE 7980 19.1 17.6 109 18.3 17.6 104
TOGWOTEE PASS 9580 25.9 22.9 113 27.4 22.7 121
TWO OCEAN PLATEAU 9240 -M 25.7 * -M 25.8 *
WILLOW CREEK 8380 32.2 28.2 114 36.3 29.7 122
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Basin wide percent of average 111 114
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 23.0 22.0 105 22.0 18.7 118
BLACK BEAR 8170 41.3 36.6 113 39.1 37.2 105
CANYON 7870 15.2 12.8 119 16.2 14.3 113
FISHER CREEK 9100 36.7 32.5 113 35.3 33.7 105
MADISON PLATEAU 7750 26.0 23.3 112 27.7 24.5 113
NORTHEAST ENTRANCE 7350 12.5 10.6 118 13.8 11.8 117
PARKER PEAK 9400 25.9 20.0 130 22.6 15.0 151
SYLVAN LAKE 8420 21.4 20.7 103 24.7 19.5 127
THUMB DIVIDE 7980 19.1 17.6 109 18.3 17.6 104
TWO OCEAN PLATEAU 9240 -M 25.7 * -M 25.8 *
WHISKEY CREEK 6800 18.8 16.0 118 21.0 19.4 108
WHITE MILL 8700 24.9 22.5 111 25.3 25.0 101
WOLVERINE 7650 13.3 11.3 118 13.3 12.0 111
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Basin wide percent of average 113 112
WIND RIVER
BURROUGHS CREEK 8750 13.8 13.7 101 14.5 15.0 97
CASTLE CREEK 8400 6.3 -M * 7.2 -M *
COLD SPRINGS 9630 7.7 8.1 95 7.6 9.3 82
DEER PARK 9700 17.0 15.3 111 19.8 20.0 99
HOBBS PARK 10100 13.0 13.2 98 11.4 11.1 103
LITTLE WARM 9370 11.2 10.7 105 11.3 12.0 94
SOUTH PASS 9040 16.0 15.4 104 14.0 16.6 84
ST. LAWRENCE ALT 8620 4.5 6.6 68 6.3 7.8 81
TOGWOTEE PASS 9580 25.9 22.9 113 27.4 22.7 121
TOWNSEND CREEK 8700 7.8 7.7 101 9.9 10.0 99
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Basin wide percent of average 103 98
BIGHORN BASIN
BALD MTN. 9380 20.0 17.7 113 16.6 15.7 106
BEAR TRAP MEADOW 8200 7.1 4.9 145 7.3 7.1 103
BLACKWATER 9780 23.3 22.6 103 22.9 18.8 122
BONE SPRINGS DIV 9350 16.8 14.5 116 14.0 13.0 108
EVENING STAR 9200 28.8 27.5 105 31.4 23.6 133
GRAVE SPRINGS 8550 7.5 8.2 91 7.6 8.8 86
KIRWIN 9550 10.3 10.2 101 11.4 10.1 113
MARQUETTE 8760 2.5 -M * 5.7 8.4 68
MIDDLE POWDER 7760 8.4 10.2 82 10.3 10.8 95
OWL CREEK 8975 5.2 4.7 111 5.2 5.0 104
POWDER RIVER PASS 9480 12.2 9.8 124 14.4 11.0 131
SHELL CREEK 9580 14.7 13.1 112 13.2 11.9 111
SYLVAN LAKE 8420 21.4 20.7 103 24.7 19.5 127
SYLVAN ROAD 7120 14.1 12.2 116 18.2 16.6 110
TIMBER CREEK 7950 3.5 4.9 71 4.2 6.2 68
YOUNTS PEAK 8350 15.9 15.8 101 13.7 14.9 92
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Basin wide percent of average 106 110
SHOSHONE RIVER
BLACKWATER 9780 23.3 22.6 103 22.9 18.8 122
EVENING STAR 9200 28.8 27.5 105 31.4 23.6 133
KIRWIN 9550 10.3 10.2 101 11.4 10.1 113
MARQUETTE 8760 2.5 -M * 5.7 8.4 68
SYLVAN LAKE 8420 21.4 20.7 103 24.7 19.5 127
SYLVAN ROAD 7120 14.1 12.2 116 18.2 16.6 110
YOUNTS PEAK 8350 15.9 15.8 101 13.7 14.9 92
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Basin wide percent of average 104 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.1 4.9 145 7.3 7.1 103
BIG GOOSE 7990 7.0 8.8 80 8.6 7.5 115
BONE SPRINGS DIV 9350 16.8 14.5 116 14.0 13.0 108
BURGESS JUNCTION 7880 9.5 10.1 94 10.4 10.7 97
CLOUD PEAK RESERVOIR 9860 13.8 11.5 120 12.8 11.1 115
DOME LAKE 8880 11.2 10.7 105 11.2 11.4 98
GRAVE SPRINGS 8550 7.5 8.2 91 7.6 8.8 86
HANSEN SAWMILL 8360 6.2 5.8 107 6.8 7.1 96
LITTLE GOOSE 8870 7.7 -M * 12.0 -M *
MIDDLE POWDER 7760 8.4 10.2 82 10.3 10.8 95
POWDER RIVER PASS 9480 12.2 9.8 124 14.4 11.0 131
SOLDIER PARK 8720 6.4 -M * 7.8 -M *
SUCKER CREEK 8880 11.2 10.2 110 12.3 11.8 104
TIE CREEK 6870 5.9 5.8 102 8.7 8.7 100
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Basin wide percent of average 106 105
BELLE FOURCHE
BLIND PARK 6890 9.4 8.4 112 15.2 10.2 149
COLE CANYON 5910 7.6 6.3 121 10.9 6.1 179
NORTH RAPID CREEK 6130 8.6 7.5 115 13.0 8.0 163
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Basin wide percent of average 115 161
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 22.4 17.1 131 22.5 18.6 121
COLUMBINE 9160 31.1 23.9 130 31.8 23.1 138
DIVIDE PEAK 8880 20.9 17.8 117 24.7 18.9 131
ELK RIVER 8700 23.2 17.9 130 24.3 17.9 136
JOE WRIGHT 10120 26.7 19.2 139 31.1 22.4 139
NORTH FRENCH CREEK 10130 40.1 25.8 155 32.2 22.4 144
OLD BATTLE 10000 38.6 29.4 131 29.0 31.7 91
SAGE CREEK BASIN 7850 18.9 10.3 183 16.7 11.0 152
SOUTH BRUSH CREEK 8440 17.1 11.7 146 20.0 14.7 136
TOWER 10500 50.3 41.5 121 46.0 35.2 131
WEBBER SPRINGS 9250 27.9 24.4 114 32.9 24.4 135
WILLOW CREEK PASS 9540 16.9 10.7 158 15.7 11.5 137
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Basin wide percent of average 134 130
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.4 21.2 134 28.7 19.6 146
CASPER MTN. 7900 10.4 12.6 83 12.7 12.5 102
DEADMAN HILL 10220 19.3 14.5 133 19.8 15.0 132
DEER PARK 9700 17.0 15.3 111 19.8 20.0 99
LAPRELE CREEK 8375 11.7 10.1 116 12.9 11.2 115
RENO HILL 8400 13.0 12.1 107 15.2 13.0 117
ROACH 9700 18.6 15.4 121 21.8 16.8 130
SAND LAKE 10050 33.6 28.9 116 32.0 21.5 149
SOUTH PASS 9040 16.0 15.4 104 14.0 16.6 84
WINDY PEAK 7900 9.8 7.2 136 12.1 9.4 129
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Basin wide percent of average 116 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 11.3 * 12.3 14.1 87
DIVIDE PEAK 8880 20.9 17.8 117 24.7 18.9 131
OLD BATTLE 10000 38.6 29.4 131 29.0 31.7 91
SANDSTONE RS 8150 14.5 14.3 101 23.2 17.3 134
WHISKEY PARK 8950 -M 27.5 * 36.2 26.0 139
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Basin wide percent of average 120 116
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.6 13.4 101 13.8 12.4 111
BLIND BULL SUM 8650 27.8 25.9 107 19.8 20.7 96
EAST RIM DIVIDE 7930 14.2 12.2 116 12.1 11.2 108
ELKHART PARK G.S. 9400 12.2 12.4 98 12.0 12.1 99
GROS VENTRE SUMMIT 8750 13.7 13.0 105 13.1 11.9 110
GUNSIGHT PASS 9820 15.4 -M * 15.2 -M *
KENDALL R.S. 7740 12.6 14.0 90 14.0 13.7 102
LOOMIS PARK 8240 18.7 16.3 115 18.9 16.2 117
NEW FORK LAKE 8340 11.8 10.5 112 10.9 10.5 104
POCKET CREEK 9360 10.8 -M * 13.1 -M *
SNIDER BASIN 8060 18.7 13.7 136 17.9 14.9 120
SPRING CREEK DIVIDE 9000 31.3 24.6 127 29.7 24.5 121
TRIPLE PEAK 8500 28.2 23.2 122 29.9 22.9 131
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Basin wide percent of average 113 112
LOWER GREEN RIVER
HAMS FORK 7840 15.8 12.3 128 14.4 11.3 127
HEWINTA 9519 12.2 10.5 116 15.6 13.0 120
HICKERSON PARK 9145 7.8 6.5 120 9.4 7.0 134
HOLE-IN-ROCK 9150 7.9 6.4 123 9.7 6.5 149
INDIAN CREEK 9425 28.6 25.3 113 25.4 23.3 109
KELLEY R.S. 8180 19.1 15.7 122 22.2 18.8 118
STEEL CREEK PARK 10200 15.8 14.3 110 18.2 14.4 126
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Basin wide percent of average 118 122
UPPER BEAR RIVER
BUG LAKE 7950 26.6 19.2 139 26.4 17.8 148
HAYDEN FORK 9212 21.1 15.0 141 26.6 19.0 140
KELLEY R.S. 8180 19.1 15.7 122 22.2 18.8 118
LILY LAKE 9156 19.2 12.0 160 20.1 15.8 127
MONTE CRISTO 8960 33.6 27.8 121 33.1 23.4 141
SALT RIVER SUMMIT 7760 15.8 13.4 118 19.9 17.3 115
TRIAL LAKE 9992 32.3 23.1 140 31.3 22.9 137
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Basin wide percent of average 133 133
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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.