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: AUGUST 22 , 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 .1 .0 * 40.1 31.2 129
COTTONWOOD CREEK 7670 .0 .0 100* 57.0 40.2 142
GRAND TARGHEE 9260 .0 -M * 63.2 -M *
GRANITE CREEK 6770 .0 .0 100* 39.4 28.8 137
GRASSY LAKE 7265 .0 .0 100* 66.0 50.7 130
GROS VENTRE SUMMIT 8750 .0 .0 100* 26.6 22.5 118
GUNSIGHT PASS 9820 .0 -M * 32.6 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100* 59.3 50.7 117
PHILLIPS BENCH 8200 .0 .0 100* 53.1 41.3 129
SALT RIVER SUMMIT 7760 .0 .0 100* 33.4 27.5 121
SNAKE RIVER STATION 6920 .0 .0 100* 44.4 33.1 134
SPRING CREEK DIVIDE 9000 -M .0 * -M 37.0 *
THUMB DIVIDE 7980 .1 .0 * 35.8 28.7 125
TOGWOTEE PASS 9580 .0 .0 100* 50.0 38.0 132
TWO OCEAN PLATEAU 9240 .0 .0 100* 51.2 42.3 121
WILLOW CREEK 8380 .0 .0 100* 65.7 48.4 136
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Basin wide percent of average * 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100* 41.6 32.9 126
BLACK BEAR 8170 .0 .0 100* 73.1 56.6 129
CANYON 7870 .0 .0 100* 29.7 25.4 117
FISHER CREEK 9100 .0 .0 100* 61.3 54.7 112
MADISON PLATEAU 7750 .0 .0 100* 52.1 39.5 132
NORTHEAST ENTRANCE 7350 .0 .0 100* 27.5 23.5 117
PARKER PEAK 9400 .0 .0 100* 46.0 28.7 160
SYLVAN LAKE 8420 .0 .0 100* 47.8 35.0 137
THUMB DIVIDE 7980 .1 .0 * 35.8 28.7 125
TWO OCEAN PLATEAU 9240 .0 .0 100* 51.2 42.3 121
WHISKEY CREEK 6800 .0 .0 100* 40.6 32.4 125
WHITE MILL 8700 .0 .0 100* 44.6 42.3 105
WOLVERINE 7650 -M .0 * 26.4 23.4 113
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Basin wide percent of average * 124
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100* 31.5 27.3 115
CASTLE CREEK 8400 .0 -M * 16.7 -M *
COLD SPRINGS 9630 .0 .0 100* 22.7 21.7 105
DEER PARK 9700 -M .0 * 36.9 35.7 103
HOBBS PARK 10100 .0 .0 100* 30.2 26.0 116
LITTLE WARM 9370 .0 .0 100* 27.4 24.9 110
SOUTH PASS 9040 .1 .0 * 27.1 30.0 90
ST. LAWRENCE ALT 8620 .0 .0 100* 21.8 19.7 111
TOGWOTEE PASS 9580 .0 .0 100* 50.0 38.0 132
TOWNSEND CREEK 8700 .0 .0 100* 24.0 23.1 104
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Basin wide percent of average * 110
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100* 38.4 31.2 123
BEAR TRAP MEADOW 8200 .0 .0 100* 22.0 19.1 115
BLACKWATER 9780 .0 .0 100* 43.7 35.7 122
BONE SPRINGS DIV 9350 .0 .0 100* 35.4 29.0 122
EVENING STAR 9200 .0 .0 100* 57.9 41.5 140
GRAVE SPRINGS 8550 .1 .0 * 24.1 21.1 114
KIRWIN 9550 .0 .0 100* 26.7 24.3 110
MARQUETTE 8760 .0 -M * 22.1 24.4 91
MIDDLE POWDER 7760 .0 .0 100* 25.5 24.0 106
OWL CREEK 8975 .0 .0 100* 16.6 16.0 104
POWDER RIVER PASS 9480 .0 .0 100* 33.6 25.0 134
SHELL CREEK 9580 .0 .0 100* 33.8 26.7 127
SYLVAN LAKE 8420 .0 .0 100* 47.8 35.0 137
SYLVAN ROAD 7120 .0 .0 100* 35.5 28.1 126
TIMBER CREEK 7950 .0 .0 100* 18.6 19.4 96
YOUNTS PEAK 8350 .0 .0 100* 29.6 28.2 105
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Basin wide percent of average * 119
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100* 43.7 35.7 122
EVENING STAR 9200 .0 .0 100* 57.9 41.5 140
KIRWIN 9550 .0 .0 100* 26.7 24.3 110
MARQUETTE 8760 .0 -M * 22.1 24.4 91
SYLVAN LAKE 8420 .0 .0 100* 47.8 35.0 137
SYLVAN ROAD 7120 .0 .0 100* 35.5 28.1 126
YOUNTS PEAK 8350 .0 .0 100* 29.6 28.2 105
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Basin wide percent of average * 121
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100* 22.0 19.1 115
BIG GOOSE 7990 .0 .0 100* 28.0 20.3 138
BONE SPRINGS DIV 9350 .0 .0 100* 35.4 29.0 122
BURGESS JUNCTION 7880 .0 .0 100* 30.5 24.3 126
CLOUD PEAK RESERVOIR 9860 .0 .0 100* 34.7 28.3 123
DOME LAKE 8880 .0 .0 100* 31.3 26.2 119
GRAVE SPRINGS 8550 .1 .0 * 24.1 21.1 114
HANSEN SAWMILL 8360 .0 .0 100* 24.1 19.9 121
LITTLE GOOSE 8870 .0 -M * 31.9 -M *
MIDDLE POWDER 7760 .0 .0 100* 25.5 24.0 106
POWDER RIVER PASS 9480 .0 .0 100* 33.6 25.0 134
SOLDIER PARK 8720 -M -M * 24.0 -M *
SUCKER CREEK 8880 -M .0 * 35.9 27.5 131
TIE CREEK 6870 .0 .0 100* 29.2 22.6 129
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Basin wide percent of average * 123
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 32.4 25.0 130
COLE CANYON 5910 .2 .0 * 31.0 20.7 150
NORTH RAPID CREEK 6130 .1 .0 * 31.1 23.6 132
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Basin wide percent of average * 136
UPPER N. PLATTE RIVER
BLACKHALL MTN 9820 .0 -M * 62.8 -M *
CINNABAR PARK 9574 .0 .0 100* 51.0 31.1 164
COLUMBINE 9160 .0 .0 100* 52.8 36.1 146
DIVIDE PEAK 8880 .0 .0 100* 44.2 31.2 142
ELK RIVER 8700 .0 .0 100* 41.2 30.2 136
JOE WRIGHT 10120 .0 .0 100* 60.7 41.5 146
NORTH FRENCH CREEK 10130 .0 .0 100* -M 40.0 *
OLD BATTLE 10000 .0 .0 100* 70.4 48.7 145
SAGE CREEK BASIN 7850 .0 .0 100* 28.3 18.1 156
SOUTH BRUSH CREEK 8440 .0 .0 100* 36.5 28.5 128
TOWER 10500 .0 .0 100* 90.0 55.3 163
WEBBER SPRINGS 9250 .1 .0 * 53.5 38.9 138
WILLOW CREEK PASS 9540 .0 .0 100* 35.5 24.2 147
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Basin wide percent of average * 147
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100* 49.8 36.2 138
CASPER MTN. 7900 .0 .0 100* 27.5 28.4 97
DEADMAN HILL 10220 .0 .0 100* 38.4 29.3 131
DEER PARK 9700 -M .0 * 36.9 35.7 103
LAPRELE CREEK 8375 .0 .0 100* 25.5 25.4 100
RENO HILL 8400 .0 .0 100* 30.8 29.2 105
ROACH 9700 .1 .0 * 40.4 31.3 129
SAND LAKE 10050 .0 .0 100* 57.4 39.5 145
SOUTH PASS 9040 .1 .0 * 27.1 30.0 90
WINDY PEAK 7900 .0 .0 100* 22.7 22.0 103
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Basin wide percent of average * 116
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * -M 23.8 *
DIVIDE PEAK 8880 .0 .0 100* 44.2 31.2 142
OLD BATTLE 10000 .0 .0 100* 70.4 48.7 145
SANDSTONE RS 8150 2.0 .0 * 42.3 28.6 148
WHISKEY PARK 8950 .0 .0 100* 64.8 42.5 152
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Basin wide percent of average * 147
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100* 27.0 22.6 119
BLIND BULL SUM 8650 .0 .0 100* 37.5 32.2 116
EAST RIM DIVIDE 7930 .2 .0 * 24.0 19.4 124
ELKHART PARK G.S. 9400 .0 .0 100* 24.0 23.5 102
GROS VENTRE SUMMIT 8750 .0 .0 100* 26.6 22.5 118
GUNSIGHT PASS 9820 .0 -M * 32.6 -M *
KENDALL R.S. 7740 .0 .0 100* 24.9 22.1 113
LOOMIS PARK 8240 .1 .0 * 34.2 26.5 129
NEW FORK LAKE 8340 .2 .0 * 19.4 19.9 97
POCKET CREEK 9360 .0 -M * 25.1 -M *
SNIDER BASIN 8060 .0 .0 100* 28.9 23.2 125
SPRING CREEK DIVIDE 9000 -M .0 * -M 37.0 *
TRIPLE PEAK 8500 .0 .0 100* 52.1 36.2 144
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Basin wide percent of average * 120
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 * 25.6 20.3 126
HEWINTA 9519 .0 .0 100* 33.4 25.1 133
HICKERSON PARK 9145 .0 .0 100* 24.5 17.1 143
HOLE-IN-ROCK 9150 .0 .0 100* 26.3 17.0 155
INDIAN CREEK 9425 .0 .0 100* 41.8 36.1 116
KELLEY R.S. 8180 .0 .0 100* 37.2 29.5 126
STEEL CREEK PARK 10200 .0 .0 100* 38.1 28.2 135
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Basin wide percent of average * 131
UPPER BEAR RIVER
BUG LAKE 7950 .0 .0 100* 45.3 28.2 161
HAYDEN FORK 9212 .0 .0 100* 48.0 32.9 146
KELLEY R.S. 8180 .0 .0 100* 37.2 29.5 126
LILY LAKE 9156 .0 .0 100* 38.2 28.3 135
MONTE CRISTO 8960 .0 .0 100* 58.2 37.5 155
SALT RIVER SUMMIT 7760 .0 .0 100* 33.4 27.5 121
TRIAL LAKE 9992 .0 .0 100* 53.0 38.7 137
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Basin wide percent of average * 141
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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.