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 MONDAY: MARCH 21 , 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 20.1 17.8 113 22.8 20.6 111
COTTONWOOD CREEK 7670 26.3 22.6 116 33.1 26.1 127
GRAND TARGHEE 9260 43.6 -M * -M -M *
GRANITE CREEK 6770 20.6 18.4 112 21.7 19.3 112
GRASSY LAKE 7265 37.2 34.1 109 38.6 34.6 112
GROS VENTRE SUMMIT 8750 14.2 13.5 105 13.7 12.3 111
GUNSIGHT PASS 9820 16.2 -M * 15.8 -M *
LEWIS LAKE DIVIDE 7850 38.0 34.0 112 -M 35.4 *
PHILLIPS BENCH 8200 29.8 27.6 108 29.8 27.8 107
SALT RIVER SUMMIT 7760 16.6 13.8 120 20.7 17.8 116
SNAKE RIVER STATION 6920 -M 18.8 * 25.0 21.5 116
SPRING CREEK DIVIDE 9000 32.7 25.3 129 30.7 25.2 122
THUMB DIVIDE 7980 21.1 18.2 116 19.2 18.1 106
TOGWOTEE PASS 9580 27.0 23.6 114 28.5 23.4 122
TWO OCEAN PLATEAU 9240 -M 26.6 * -M 26.5 *
WILLOW CREEK 8380 33.8 29.0 117 37.8 30.6 124
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Basin wide percent of average 114 116
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.7 22.5 110 23.7 19.2 123
BLACK BEAR 8170 44.6 37.7 118 41.4 38.4 108
CANYON 7870 16.4 13.2 124 17.5 14.7 119
FISHER CREEK 9100 38.9 33.3 117 37.4 34.7 108
MADISON PLATEAU 7750 28.4 23.9 119 29.9 25.3 118
NORTHEAST ENTRANCE 7350 13.2 10.9 121 14.3 12.1 118
PARKER PEAK 9400 27.4 20.6 133 23.8 15.4 155
SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131
THUMB DIVIDE 7980 21.1 18.2 116 19.2 18.1 106
TWO OCEAN PLATEAU 9240 -M 26.6 * -M 26.5 *
WHISKEY CREEK 6800 20.0 16.4 122 22.5 20.0 113
WHITE MILL 8700 26.4 23.1 114 26.8 25.8 104
WOLVERINE 7650 14.3 11.4 125 14.0 12.3 114
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Basin wide percent of average 118 116
WIND RIVER
BURROUGHS CREEK 8750 14.3 14.0 102 15.0 15.5 97
CASTLE CREEK 8400 6.6 -M * 7.4 -M *
COLD SPRINGS 9630 8.0 8.4 95 7.8 9.7 80
DEER PARK 9700 17.4 16.2 107 20.4 20.6 99
HOBBS PARK 10100 13.7 13.8 99 12.0 11.6 103
LITTLE WARM 9370 12.0 11.1 108 12.2 12.5 98
SOUTH PASS 9040 16.3 16.0 102 14.2 17.2 83
ST. LAWRENCE ALT 8620 4.6 6.8 68 6.5 8.1 80
TOGWOTEE PASS 9580 27.0 23.6 114 28.5 23.4 122
TOWNSEND CREEK 8700 8.1 8.1 100 10.2 10.5 97
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Basin wide percent of average 103 98
BIGHORN BASIN
BALD MTN. 9380 20.7 18.4 113 17.2 16.2 106
BEAR TRAP MEADOW 8200 7.1 5.2 137 7.4 7.5 99
BLACKWATER 9780 24.8 23.2 107 24.1 19.4 124
BONE SPRINGS DIV 9350 17.7 15.1 117 14.8 13.5 110
EVENING STAR 9200 29.9 28.2 106 32.3 24.2 133
GRAVE SPRINGS 8550 7.8 8.6 91 7.8 9.0 87
KIRWIN 9550 10.8 10.5 103 11.9 10.5 113
MARQUETTE 8760 2.6 -M * 5.9 8.8 67
MIDDLE POWDER 7760 8.6 10.9 79 10.4 11.3 92
OWL CREEK 8975 5.2 5.1 102 5.2 5.2 100
POWDER RIVER PASS 9480 12.8 10.1 127 15.0 11.4 132
SHELL CREEK 9580 15.4 13.7 112 14.0 12.3 114
SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131
SYLVAN ROAD 7120 15.1 12.3 123 19.3 17.0 114
TIMBER CREEK 7950 3.6 5.2 69 4.4 6.6 67
YOUNTS PEAK 8350 16.8 16.4 102 14.5 15.4 94
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Basin wide percent of average 107 111
SHOSHONE RIVER
BLACKWATER 9780 24.8 23.2 107 24.1 19.4 124
EVENING STAR 9200 29.9 28.2 106 32.3 24.2 133
KIRWIN 9550 10.8 10.5 103 11.9 10.5 113
MARQUETTE 8760 2.6 -M * 5.9 8.8 67
SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131
SYLVAN ROAD 7120 15.1 12.3 123 19.3 17.0 114
YOUNTS PEAK 8350 16.8 16.4 102 14.5 15.4 94
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Basin wide percent of average 107 116
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.1 5.2 137 7.4 7.5 99
BIG GOOSE 7990 7.3 9.3 78 9.0 7.8 115
BONE SPRINGS DIV 9350 17.7 15.1 117 14.8 13.5 110
BURGESS JUNCTION 7880 9.7 10.7 91 10.7 11.1 96
CLOUD PEAK RESERVOIR 9860 14.4 12.2 118 13.7 11.6 118
DOME LAKE 8880 11.9 11.3 105 11.9 11.9 100
GRAVE SPRINGS 8550 7.8 8.6 91 7.8 9.0 87
HANSEN SAWMILL 8360 6.5 6.2 105 7.1 7.5 95
LITTLE GOOSE 8870 8.1 -M * 12.4 -M *
MIDDLE POWDER 7760 8.6 10.9 79 10.4 11.3 92
POWDER RIVER PASS 9480 12.8 10.1 127 15.0 11.4 132
SOLDIER PARK 8720 7.1 -M * 8.1 -M *
SUCKER CREEK 8880 11.7 10.8 108 12.9 12.4 104
TIE CREEK 6870 6.1 6.1 100 8.9 9.1 98
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Basin wide percent of average 104 104
BELLE FOURCHE
BLIND PARK 6890 9.0 8.6 105 15.3 10.4 147
COLE CANYON 5910 7.4 6.5 114 10.9 6.2 176
NORTH RAPID CREEK 6130 8.1 7.8 104 13.1 8.2 160
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Basin wide percent of average 107 158
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 23.4 17.4 134 23.3 19.0 123
COLUMBINE 9160 31.5 24.4 129 32.6 23.8 137
DIVIDE PEAK 8880 21.9 18.6 118 25.5 19.6 130
ELK RIVER 8700 24.0 18.4 130 25.1 18.4 136
JOE WRIGHT 10120 29.2 19.8 147 32.9 23.2 142
NORTH FRENCH CREEK 10130 41.1 26.9 153 32.3 23.2 139
OLD BATTLE 10000 39.2 30.4 129 29.2 32.8 89
SAGE CREEK BASIN 7850 19.6 10.8 181 17.2 11.3 152
SOUTH BRUSH CREEK 8440 17.8 12.3 145 20.6 15.2 136
TOWER 10500 50.8 42.8 119 46.1 36.3 127
WEBBER SPRINGS 9250 28.7 25.3 113 33.5 25.2 133
WILLOW CREEK PASS 9540 18.3 11.1 165 17.0 11.9 143
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Basin wide percent of average 134 129
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 29.2 22.0 133 29.0 20.5 141
CASPER MTN. 7900 10.7 13.2 81 13.1 13.0 101
DEADMAN HILL 10220 20.4 15.1 135 20.8 15.7 132
DEER PARK 9700 17.4 16.2 107 20.4 20.6 99
LAPRELE CREEK 8375 11.9 10.4 114 13.1 11.6 113
RENO HILL 8400 13.2 12.8 103 15.5 13.6 114
ROACH 9700 19.5 15.9 123 22.6 17.4 130
SAND LAKE 10050 34.4 30.2 114 32.7 22.4 146
SOUTH PASS 9040 16.3 16.0 102 14.2 17.2 83
WINDY PEAK 7900 9.9 7.6 130 12.3 9.8 126
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Basin wide percent of average 115 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 11.5 * 13.1 14.7 89
DIVIDE PEAK 8880 21.9 18.6 118 25.5 19.6 130
OLD BATTLE 10000 39.2 30.4 129 29.2 32.8 89
SANDSTONE RS 8150 15.3 14.7 104 23.9 17.8 134
WHISKEY PARK 8950 -M 28.6 * 37.3 27.0 138
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Basin wide percent of average 120 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 14.0 13.8 101 14.1 12.7 111
BLIND BULL SUM 8650 29.2 26.8 109 20.6 21.3 97
EAST RIM DIVIDE 7930 14.8 12.6 117 12.5 11.6 108
ELKHART PARK G.S. 9400 12.6 12.8 98 12.4 12.6 98
GROS VENTRE SUMMIT 8750 14.2 13.5 105 13.7 12.3 111
GUNSIGHT PASS 9820 16.2 -M * 15.8 -M *
KENDALL R.S. 7740 12.9 14.4 90 14.5 14.1 103
LOOMIS PARK 8240 19.4 16.8 115 19.4 16.7 116
NEW FORK LAKE 8340 12.2 10.8 113 11.0 10.8 102
POCKET CREEK 9360 11.1 -M * 13.3 -M *
SNIDER BASIN 8060 19.7 14.1 140 18.4 15.4 119
SPRING CREEK DIVIDE 9000 32.7 25.3 129 30.7 25.2 122
TRIPLE PEAK 8500 29.9 23.9 125 31.1 23.6 132
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Basin wide percent of average 115 113
LOWER GREEN RIVER
HAMS FORK 7840 16.6 12.4 134 14.9 11.6 128
HEWINTA 9519 12.1 11.0 110 15.9 13.5 118
HICKERSON PARK 9145 8.4 6.8 124 9.7 7.3 133
HOLE-IN-ROCK 9150 8.1 6.6 123 10.1 6.8 149
INDIAN CREEK 9425 29.8 26.3 113 26.2 24.0 109
KELLEY R.S. 8180 19.8 16.2 122 22.6 19.3 117
STEEL CREEK PARK 10200 13.4 14.8 91 18.9 15.0 126
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Basin wide percent of average 115 121
UPPER BEAR RIVER
BUG LAKE 7950 27.8 19.9 140 27.4 18.3 150
HAYDEN FORK 9212 22.2 15.5 143 27.6 19.7 140
KELLEY R.S. 8180 19.8 16.2 122 22.6 19.3 117
LILY LAKE 9156 20.0 12.4 161 20.8 16.4 127
MONTE CRISTO 8960 35.4 28.7 123 34.3 24.1 142
SALT RIVER SUMMIT 7760 16.6 13.8 120 20.7 17.8 116
TRIAL LAKE 9992 33.6 23.9 141 32.2 23.6 136
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Basin wide percent of average 135 133
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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.