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 FRIDAY: AUGUST 7 , 2009
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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 -M .0 * -M 30.5 *
COTTONWOOD CREEK 7670 .0 .0 100 48.1 39.4 122
GRAND TARGHEE 9260 .0 -M * 51.1 -M *
GRANITE CREEK 6770 .1 .0 31.8 28.2 113
GRASSY LAKE 7265 .1 .0 51.8 50.0 104
GROS VENTRE SUMMIT 8750 .1 .0 25.1 21.7 116
GUNSIGHT PASS 9820 -M -M * -M -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 49.8 49.9 100
PHILLIPS BENCH 8200 .0 .0 100 44.4 40.5 110
SALT RIVER SUMMIT 7760 .0 .0 100 27.7 26.8 103
SNAKE RIVER STATION 6920 .0 .0 100 35.7 32.4 110
SPRING CREEK DIVIDE 9000 .0 .0 100 40.2 36.2 111
THUMB DIVIDE 7980 .1 .0 33.5 28.1 119
TOGWOTEE PASS 9580 .1 .0 45.3 37.2 122
TWO OCEAN PLATEAU 9240 .0 .0 100 46.7 41.5 113
WILLOW CREEK 8380 .0 .0 100 58.8 47.4 124
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Basin wide percent of average * 112
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100 36.0 32.2 112
BLACK BEAR 8170 .0 .0 100 51.8 55.7 93
CANYON 7870 .0 .0 100 28.2 24.7 114
FISHER CREEK 9100 -M .0 * 51.7 53.6 96
MADISON PLATEAU 7750 .0 .0 100 37.7 38.7 97
NORTHEAST ENTRANCE 7350 .0 .0 100 24.6 22.6 109
PARKER PEAK 9400 .0 .0 100 31.5 28.0 112
SYLVAN LAKE 8420 .0 .0 100 38.6 34.3 113
THUMB DIVIDE 7980 .1 .0 33.5 28.1 119
TWO OCEAN PLATEAU 9240 .0 .0 100 46.7 41.5 113
WHISKEY CREEK 6800 .2 .0 29.6 31.7 93
WHITE MILL 8700 .1 .0 38.9 41.3 94
WOLVERINE 7650 .0 .0 100 23.9 22.6 106
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Basin wide percent of average * 104
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 30.2 26.6 114
COLD SPRINGS 9630 .0 .0 100 21.4 21.0 102
DEER PARK 9700 .0 .0 100 32.1 35.0 92
HOBBS PARK 10100 .0 .0 100 27.4 25.4 108
LITTLE WARM 9370 .0 .0 100 27.2 24.2 112
SOUTH PASS 9040 .0 .0 100 27.7 29.5 94
ST. LAWRENCE ALT 8620 .0 .0 100 19.9 19.1 104
TOGWOTEE PASS 9580 .1 .0 45.3 37.2 122
TOWNSEND CREEK 8700 .0 .0 100 23.9 22.6 106
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Basin wide percent of average * 106
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100 27.9 30.6 91
BEAR TRAP MEADOW 8200 .0 .0 100 19.9 18.7 106
BLACKWATER 9780 .0 .0 100 38.1 34.9 109
BONE SPRINGS DIV 9350 .0 .0 100 27.2 28.1 97
EVENING STAR 9200 -M .0 * -M 40.7 *
GRAVE SPRINGS 8550 .0 .0 100 16.6 20.8 80
KIRWIN 9550 .0 .0 100 28.1 23.3 121
MARQUETTE 8760 .0 .0 100 20.0 23.6 85
MIDDLE POWDER 7760 .0 .0 100 19.8 23.6 84
OWL CREEK 8975 .0 .0 100 20.1 15.4 131
POWDER RIVER PASS 9480 .0 .0 100 26.9 24.5 110
SHELL CREEK 9580 .0 .0 100 27.3 26.0 105
SYLVAN LAKE 8420 .0 .0 100 38.6 34.3 113
SYLVAN ROAD 7120 .0 .0 100 32.1 27.5 117
TIMBER CREEK 7950 .0 .0 100 19.2 18.7 103
YOUNTS PEAK 8350 .0 .0 100 27.8 27.3 102
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Basin wide percent of average * 103
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100 38.1 34.9 109
EVENING STAR 9200 -M .0 * -M 40.7 *
KIRWIN 9550 .0 .0 100 28.1 23.3 121
MARQUETTE 8760 .0 .0 100 20.0 23.6 85
SYLVAN LAKE 8420 .0 .0 100 38.6 34.3 113
SYLVAN ROAD 7120 .0 .0 100 32.1 27.5 117
YOUNTS PEAK 8350 .0 .0 100 27.8 27.3 102
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Basin wide percent of average * 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 19.9 18.7 106
BIG GOOSE 7990 .0 .0 100 21.8 19.8 110
BONE SPRINGS DIV 9350 .0 .0 100 27.2 28.1 97
BURGESS JUNCTION 7880 .0 .0 100 23.1 23.7 97
CLOUD PEAK RESERVOIR 9860 .0 .0 100 29.4 27.5 107
DOME LAKE 8880 .0 .0 100 26.2 25.5 103
GRAVE SPRINGS 8550 .0 .0 100 16.6 20.8 80
HANSEN SAWMILL 8360 .0 .0 100 19.0 19.3 98
MIDDLE POWDER 7760 .0 .0 100 19.8 23.6 84
POWDER RIVER PASS 9480 .0 .0 100 26.9 24.5 110
SUCKER CREEK 8880 .0 .0 100 30.2 26.8 113
TIE CREEK 6870 .2 .0 27.4 21.8 126
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Basin wide percent of average * 103
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 25.9 24.2 107
COLE CANYON 5910 .0 .0 100 24.1 19.6 123
NORTH RAPID CREEK 6130 .2 .0 21.3 22.6 94
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Basin wide percent of average * 107
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 37.9 35.4 107
DIVIDE PEAK 8880 .2 .0 40.8 30.6 133
ELK RIVER 8700 .2 .0 31.6 29.4 107
JOE WRIGHT 10120 .2 .0 43.0 40.2 107
NORTH FRENCH CREEK 10130 -M .0 * -M 39.2 *
OLD BATTLE 10000 .0 .0 100 -M 48.0 *
SAGE CREEK BASIN 7850 .0 .0 100 24.9 17.7 141
SOUTH BRUSH CREEK 8440 .0 .0 100 -M 27.7 *
TOWER 10500 .0 .0 100 59.1 54.4 109
WEBBER SPRINGS 9250 .0 .0 100 41.7 38.2 109
WILLOW CREEK PASS 9540 .1 .0 22.6 23.2 97
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Basin wide percent of average * 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 -M 35.4 *
CASPER MTN. 7900 .0 .0 100 26.1 27.8 94
DEADMAN HILL 10220 .0 .0 100 28.2 28.4 99
DEER PARK 9700 .0 .0 100 32.1 35.0 92
LAPRELE CREEK 8375 -M .0 * 22.7 24.4 93
RENO HILL 8400 .1 .0 27.7 28.5 97
ROACH 9700 .0 .0 100 31.3 30.4 103
SAND LAKE 10050 .0 .0 100 44.3 38.7 114
SOUTH PASS 9040 .0 .0 100 27.7 29.5 94
WINDY PEAK 7900 .0 .0 100 21.9 21.3 103
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Basin wide percent of average * 99
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 28.3 23.3 121
DIVIDE PEAK 8880 .2 .0 40.8 30.6 133
OLD BATTLE 10000 .0 .0 100 -M 48.0 *
SANDSTONE RS 8150 -M .0 * 30.9 27.9 111
WHISKEY PARK 8950 -M .0 * -M 41.8 *
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Basin wide percent of average * 122
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 26.3 22.0 120
BLIND BULL SUM 8650 .0 .0 100 32.3 31.4 103
EAST RIM DIVIDE 7930 .0 .0 100 21.2 18.8 113
ELKHART PARK G.S. 9400 .1 .0 27.3 22.6 121
GROS VENTRE SUMMIT 8750 .1 .0 25.1 21.7 116
GUNSIGHT PASS 9820 -M -M * -M -M *
KENDALL R.S. 7740 .1 .0 23.9 21.5 111
LOOMIS PARK 8240 .1 .0 30.2 25.6 118
NEW FORK LAKE 8340 .1 .0 21.1 19.2 110
SNIDER BASIN 8060 .0 .0 100 23.2 22.7 102
SPRING CREEK DIVIDE 9000 .0 .0 100 40.2 36.2 111
TRIPLE PEAK 8500 .1 .0 41.0 35.5 115
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Basin wide percent of average * 112
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 22.7 19.7 115
HEWINTA 9519 .1 .0 22.6 24.2 93
HICKERSON PARK 9145 .0 .0 100 21.9 16.1 136
HOLE-IN-ROCK 9150 .0 .0 100 18.8 15.9 118
INDIAN CREEK 9425 .0 .0 100 33.4 35.4 94
KELLEY R.S. 8180 .1 .0 29.8 28.9 103
STEEL CREEK PARK 10200 .0 .0 100 27.3 27.3 100
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Basin wide percent of average * 105
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 27.0 27.6 98
HAYDEN FORK 9212 .0 .0 100 33.0 32.0 103
KELLEY R.S. 8180 .1 .0 29.8 28.9 103
LILY LAKE 9156 .0 .0 100 27.3 27.4 100
MONTE CRISTO 8960 .0 .0 100 38.7 36.9 105
SALT RIVER SUMMIT 7760 .0 .0 100 27.7 26.8 103
TRIAL LAKE 9992 .0 .0 100 37.8 37.5 101
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Basin wide percent of average * 102
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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 1961-90.
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.