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 TUESDAY: SEPTEMBER 1 , 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 .0 .0 100 32.6 31.6 103
COTTONWOOD CREEK 7670 .0 .0 100 48.9 40.8 120
GRAND TARGHEE 9260 .0 -M * 53.0 -M *
GRANITE CREEK 6770 .0 .0 100 32.4 29.1 111
GRASSY LAKE 7265 .1 .0 53.1 51.3 104
GROS VENTRE SUMMIT 8750 .0 .0 100 25.9 23.0 113
GUNSIGHT PASS 9820 -M -M * -M -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 51.0 51.3 99
PHILLIPS BENCH 8200 .0 .0 100 44.9 41.8 107
SALT RIVER SUMMIT 7760 .2 .0 28.2 27.9 101
SNAKE RIVER STATION 6920 .0 .0 100 36.6 33.6 109
SPRING CREEK DIVIDE 9000 .0 .0 100 41.0 37.5 109
THUMB DIVIDE 7980 .1 .0 35.0 29.0 121
TOGWOTEE PASS 9580 .0 .0 100 46.2 38.5 120
TWO OCEAN PLATEAU 9240 .0 .0 100 48.3 42.8 113
WILLOW CREEK 8380 .0 .0 100 60.2 49.0 123
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Basin wide percent of average * 111
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100 37.1 33.3 111
BLACK BEAR 8170 .0 .0 100 53.8 57.2 94
CANYON 7870 .0 .0 100 28.6 25.9 110
FISHER CREEK 9100 .0 .0 100 53.4 55.4 96
MADISON PLATEAU 7750 .0 .0 100 39.0 40.0 98
NORTHEAST ENTRANCE 7350 .0 .0 100 26.1 24.0 109
PARKER PEAK 9400 .0 .0 100 33.1 29.1 114
SYLVAN LAKE 8420 .0 .0 100 39.8 35.3 113
THUMB DIVIDE 7980 .1 .0 35.0 29.0 121
TWO OCEAN PLATEAU 9240 .0 .0 100 48.3 42.8 113
WHISKEY CREEK 6800 .0 .0 100 31.8 33.0 96
WHITE MILL 8700 .0 .0 100 40.5 42.9 94
WOLVERINE 7650 .0 .0 100 24.5 23.9 103
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Basin wide percent of average * 104
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 30.7 27.8 110
COLD SPRINGS 9630 .0 .0 100 22.0 22.0 100
DEER PARK 9700 .0 .0 100 32.6 36.1 90
HOBBS PARK 10100 .0 .0 100 28.0 26.5 106
LITTLE WARM 9370 .0 .0 100 28.1 25.4 111
SOUTH PASS 9040 .0 .0 100 28.3 30.4 93
ST. LAWRENCE ALT 8620 .0 .0 100 20.5 20.0 102
TOGWOTEE PASS 9580 .0 .0 100 46.2 38.5 120
TOWNSEND CREEK 8700 .0 .0 100 24.4 23.5 104
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Basin wide percent of average * 104
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100 29.4 31.6 93
BEAR TRAP MEADOW 8200 .0 .0 100 21.9 19.4 113
BLACKWATER 9780 .0 .0 100 39.5 36.1 109
BONE SPRINGS DIV 9350 .0 .0 100 28.0 29.5 95
EVENING STAR 9200 .0 .0 100 49.0 42.0 117
GRAVE SPRINGS 8550 .0 .0 100 18.4 21.3 86
KIRWIN 9550 .0 .0 100 30.0 24.8 121
MARQUETTE 8760 .0 .0 100 21.0 24.9 84
MIDDLE POWDER 7760 .0 .0 100 23.7 24.3 98
OWL CREEK 8975 .0 .0 100 21.2 16.3 130
POWDER RIVER PASS 9480 .0 .0 100 28.6 25.4 113
SHELL CREEK 9580 .0 .0 100 29.3 27.1 108
SYLVAN LAKE 8420 .0 .0 100 39.8 35.3 113
SYLVAN ROAD 7120 .0 .0 100 32.8 28.6 115
TIMBER CREEK 7950 .0 .0 100 19.8 19.9 99
YOUNTS PEAK 8350 .0 .0 100 28.5 28.8 99
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Basin wide percent of average * 106
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100 39.5 36.1 109
EVENING STAR 9200 .0 .0 100 49.0 42.0 117
KIRWIN 9550 .0 .0 100 30.0 24.8 121
MARQUETTE 8760 .0 .0 100 21.0 24.9 84
SYLVAN LAKE 8420 .0 .0 100 39.8 35.3 113
SYLVAN ROAD 7120 .0 .0 100 32.8 28.6 115
YOUNTS PEAK 8350 .0 .0 100 28.5 28.8 99
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Basin wide percent of average * 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 21.9 19.4 113
BIG GOOSE 7990 .0 .0 100 23.4 20.9 112
BONE SPRINGS DIV 9350 .0 .0 100 28.0 29.5 95
BURGESS JUNCTION 7880 .0 .0 100 24.3 24.6 99
CLOUD PEAK RESERVOIR 9860 .0 .0 100 30.6 28.6 107
DOME LAKE 8880 .0 .0 100 27.6 26.6 104
GRAVE SPRINGS 8550 .0 .0 100 18.4 21.3 86
HANSEN SAWMILL 8360 .0 .0 100 20.5 20.3 101
MIDDLE POWDER 7760 .0 .0 100 23.7 24.3 98
POWDER RIVER PASS 9480 .0 .0 100 28.6 25.4 113
SUCKER CREEK 8880 .0 .0 100 31.3 27.9 112
TIE CREEK 6870 .0 .0 100 28.3 23.1 123
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Basin wide percent of average * 105
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 27.3 25.5 107
COLE CANYON 5910 .0 .0 100 27.2 21.2 128
NORTH RAPID CREEK 6130 .0 .0 100 22.6 24.1 94
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Basin wide percent of average * 109
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 38.3 36.4 105
DIVIDE PEAK 8880 .1 .0 41.5 31.6 131
ELK RIVER 8700 .0 .0 100 33.2 30.7 108
JOE WRIGHT 10120 .0 .0 100 44.0 42.1 105
NORTH FRENCH CREEK 10130 .0 .0 100 48.0 40.5 119
OLD BATTLE 10000 .0 .0 100 -M 49.2 *
SAGE CREEK BASIN 7850 .0 .0 100 26.1 18.4 142
SOUTH BRUSH CREEK 8440 .0 .0 100 27.4 29.0 94
TOWER 10500 .0 .0 100 60.3 55.9 108
WEBBER SPRINGS 9250 .0 .0 100 43.1 39.4 109
WILLOW CREEK PASS 9540 .0 .0 100 23.2 24.7 94
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Basin wide percent of average * 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 34.2 36.7 93
CASPER MTN. 7900 .0 .0 100 26.7 28.7 93
DEADMAN HILL 10220 .0 .0 100 28.9 29.8 97
DEER PARK 9700 .0 .0 100 32.6 36.1 90
LAPRELE CREEK 8375 -M .0 * 23.4 26.0 90
RENO HILL 8400 .1 .0 28.3 29.6 96
ROACH 9700 .0 .0 100 32.4 31.7 102
SAND LAKE 10050 .0 .0 100 45.5 39.9 114
SOUTH PASS 9040 .0 .0 100 28.3 30.4 93
WINDY PEAK 7900 .0 .0 100 23.3 22.4 104
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Basin wide percent of average * 98
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 29.0 24.1 120
DIVIDE PEAK 8880 .1 .0 41.5 31.6 131
OLD BATTLE 10000 .0 .0 100 -M 49.2 *
SANDSTONE RS 8150 -M .0 * 32.1 29.1 110
WHISKEY PARK 8950 .0 .0 100 48.4 42.9 113
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Basin wide percent of average * 118
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 27.0 23.1 117
BLIND BULL SUM 8650 .0 .0 100 32.9 32.6 101
EAST RIM DIVIDE 7930 -M .0 * 21.7 19.8 110
ELKHART PARK G.S. 9400 .0 .0 100 28.1 24.1 117
GROS VENTRE SUMMIT 8750 .0 .0 100 25.9 23.0 113
GUNSIGHT PASS 9820 -M -M * -M -M *
KENDALL R.S. 7740 .1 .0 24.3 22.5 108
LOOMIS PARK 8240 .1 .0 30.7 27.1 113
NEW FORK LAKE 8340 .0 .0 100 21.8 20.3 107
SNIDER BASIN 8060 .0 .0 100 23.6 23.5 100
SPRING CREEK DIVIDE 9000 .0 .0 100 41.0 37.5 109
TRIPLE PEAK 8500 .0 .0 100 41.5 36.7 113
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Basin wide percent of average * 110
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 23.1 20.6 112
HEWINTA 9519 .0 .0 100 23.2 25.7 90
HICKERSON PARK 9145 .0 .0 100 23.1 17.7 131
HOLE-IN-ROCK 9150 .0 .0 100 19.5 17.6 111
INDIAN CREEK 9425 .0 .0 100 34.1 36.5 93
KELLEY R.S. 8180 .2 .0 30.6 29.9 102
STEEL CREEK PARK 10200 .0 .0 100 28.0 28.8 97
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Basin wide percent of average * 103
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 27.7 28.6 97
HAYDEN FORK 9212 .0 .0 100 33.9 33.4 101
KELLEY R.S. 8180 .2 .0 30.6 29.9 102
LILY LAKE 9156 .0 .0 100 28.0 28.8 97
MONTE CRISTO 8960 .0 .0 100 39.7 38.0 104
SALT RIVER SUMMIT 7760 .2 .0 28.2 27.9 101
TRIAL LAKE 9992 .0 .0 100 38.6 39.4 98
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Basin wide percent of average * 100
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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.