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: SEPTEMBER 14 , 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 32.2 101
COTTONWOOD CREEK 7670 .0 .0 100 49.0 41.6 118
GRAND TARGHEE 9260 .1 -M * 53.1 -M *
GRANITE CREEK 6770 .1 .0 32.6 29.7 110
GRASSY LAKE 7265 .1 .0 53.7 52.3 103
GROS VENTRE SUMMIT 8750 .1 .0 26.1 23.8 110
GUNSIGHT PASS 9820 .0 -M * 30.7 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 51.2 52.1 98
PHILLIPS BENCH 8200 .1 .0 45.1 42.6 106
SALT RIVER SUMMIT 7760 .2 .0 28.3 28.6 99
SNAKE RIVER STATION 6920 .0 .0 100 36.9 34.2 108
SPRING CREEK DIVIDE 9000 .1 .0 41.0 38.3 107
THUMB DIVIDE 7980 .1 .0 35.1 29.5 119
TOGWOTEE PASS 9580 .0 .0 100 46.6 39.3 119
TWO OCEAN PLATEAU 9240 .0 .0 100 48.5 43.7 111
WILLOW CREEK 8380 .0 .0 100 60.2 50.0 120
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Basin wide percent of average * 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100 37.6 34.1 110
BLACK BEAR 8170 .0 .1 0 53.8 58.2 92
CANYON 7870 .0 .0 100 29.2 26.6 110
FISHER CREEK 9100 .0 .0 100 53.9 56.6 95
MADISON PLATEAU 7750 .0 .1 0 39.2 40.9 96
NORTHEAST ENTRANCE 7350 .0 .0 100 26.3 24.9 106
PARKER PEAK 9400 .0 .0 100 33.2 29.8 111
SYLVAN LAKE 8420 .0 .0 100 40.0 36.0 111
THUMB DIVIDE 7980 .1 .0 35.1 29.5 119
TWO OCEAN PLATEAU 9240 .0 .0 100 48.5 43.7 111
WHISKEY CREEK 6800 .0 .0 100 31.8 34.1 93
WHITE MILL 8700 .0 .0 100 41.2 43.9 94
WOLVERINE 7650 .0 .0 100 24.9 24.6 101
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Basin wide percent of average 0 102
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 30.8 28.6 108
COLD SPRINGS 9630 .0 .0 100 22.1 22.8 97
DEER PARK 9700 .0 .0 100 32.7 37.0 88
HOBBS PARK 10100 .0 .0 100 28.1 27.2 103
LITTLE WARM 9370 .0 .0 100 28.2 26.3 107
SOUTH PASS 9040 .0 .0 100 28.5 31.0 92
ST. LAWRENCE ALT 8620 .0 .0 100 20.5 20.5 100
TOGWOTEE PASS 9580 .0 .0 100 46.6 39.3 119
TOWNSEND CREEK 8700 .0 .0 100 24.5 24.2 101
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Basin wide percent of average * 102
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100 29.8 32.4 92
BEAR TRAP MEADOW 8200 .0 .0 100 22.3 20.1 111
BLACKWATER 9780 .0 .1 0 39.8 37.1 107
BONE SPRINGS DIV 9350 .0 .1 0 28.6 30.4 94
EVENING STAR 9200 .0 .0 100 49.2 42.8 115
GRAVE SPRINGS 8550 .0 .0 100 18.8 21.8 86
KIRWIN 9550 .0 .0 100 30.2 25.8 117
MARQUETTE 8760 .0 .1 0 21.3 25.9 82
MIDDLE POWDER 7760 .0 .0 100 24.7 25.0 99
OWL CREEK 8975 .0 .0 100 21.2 17.0 125
POWDER RIVER PASS 9480 .0 .0 100 29.2 26.1 112
SHELL CREEK 9580 .0 .1 0 29.6 27.9 106
SYLVAN LAKE 8420 .0 .0 100 40.0 36.0 111
SYLVAN ROAD 7120 .0 .0 100 33.0 29.3 113
TIMBER CREEK 7950 .0 .1 0 19.8 20.7 96
YOUNTS PEAK 8350 .0 .0 100 28.9 29.9 97
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Basin wide percent of average 0 104
SHOSHONE RIVER
BLACKWATER 9780 .0 .1 0 39.8 37.1 107
EVENING STAR 9200 .0 .0 100 49.2 42.8 115
KIRWIN 9550 .0 .0 100 30.2 25.8 117
MARQUETTE 8760 .0 .1 0 21.3 25.9 82
SYLVAN LAKE 8420 .0 .0 100 40.0 36.0 111
SYLVAN ROAD 7120 .0 .0 100 33.0 29.3 113
YOUNTS PEAK 8350 .0 .0 100 28.9 29.9 97
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Basin wide percent of average 0 107
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 22.3 20.1 111
BIG GOOSE 7990 .0 .0 100 23.5 21.6 109
BONE SPRINGS DIV 9350 .0 .1 0 28.6 30.4 94
BURGESS JUNCTION 7880 .0 .0 100 24.4 25.2 97
CLOUD PEAK RESERVOIR 9860 .0 .0 100 31.1 29.6 105
DOME LAKE 8880 .0 .1 0 28.0 27.5 102
GRAVE SPRINGS 8550 .0 .0 100 18.8 21.8 86
HANSEN SAWMILL 8360 .0 .0 100 21.3 21.1 101
MIDDLE POWDER 7760 .0 .0 100 24.7 25.0 99
POWDER RIVER PASS 9480 .0 .0 100 29.2 26.1 112
SUCKER CREEK 8880 .0 .0 100 31.4 28.7 109
TIE CREEK 6870 .0 .0 100 28.5 23.8 120
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Basin wide percent of average 0 104
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 28.6 26.0 110
COLE CANYON 5910 .0 .0 100 27.6 21.8 127
NORTH RAPID CREEK 6130 .0 .0 100 24.8 24.4 102
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Basin wide percent of average * 112
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 38.7 37.0 105
DIVIDE PEAK 8880 .2 .0 41.5 32.3 128
ELK RIVER 8700 .0 .0 100 33.1 31.3 106
JOE WRIGHT 10120 .0 .0 100 44.2 43.2 102
NORTH FRENCH CREEK 10130 .0 .0 100 48.5 41.2 118
OLD BATTLE 10000 .0 .0 100 56.1 50.1 112
SAGE CREEK BASIN 7850 .0 .0 100 26.1 18.7 140
SOUTH BRUSH CREEK 8440 .0 .0 100 27.6 29.8 93
TOWER 10500 .1 .0 60.5 56.8 107
WEBBER SPRINGS 9250 .0 .0 100 43.3 40.3 107
WILLOW CREEK PASS 9540 .0 .0 100 23.4 25.5 92
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Basin wide percent of average * 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 34.4 37.4 92
CASPER MTN. 7900 .1 .0 26.8 29.2 92
DEADMAN HILL 10220 .0 .0 100 28.9 30.5 95
DEER PARK 9700 .0 .0 100 32.7 37.0 88
LAPRELE CREEK 8375 -M .0 * 23.7 26.7 89
RENO HILL 8400 .0 .0 100 28.4 30.2 94
ROACH 9700 .0 .0 100 32.5 32.4 100
SAND LAKE 10050 .0 .0 100 45.8 40.6 113
SOUTH PASS 9040 .0 .0 100 28.5 31.0 92
WINDY PEAK 7900 .3 .0 24.1 22.9 105
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Basin wide percent of average * 96
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 28.9 24.6 117
DIVIDE PEAK 8880 .2 .0 41.5 32.3 128
OLD BATTLE 10000 .0 .0 100 56.1 50.1 112
SANDSTONE RS 8150 -M .0 * 32.1 29.8 108
WHISKEY PARK 8950 .1 .0 48.6 43.6 111
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Basin wide percent of average * 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .1 .0 27.2 23.8 114
BLIND BULL SUM 8650 .0 .0 100 33.2 33.3 100
EAST RIM DIVIDE 7930 .0 .0 100 21.8 20.4 107
ELKHART PARK G.S. 9400 .1 .0 28.3 25.1 113
GROS VENTRE SUMMIT 8750 .1 .0 26.1 23.8 110
GUNSIGHT PASS 9820 .0 -M * 30.7 -M *
KENDALL R.S. 7740 .1 .0 24.4 23.1 106
LOOMIS PARK 8240 .1 .0 30.8 27.9 110
NEW FORK LAKE 8340 .0 .0 100 22.3 21.1 106
SNIDER BASIN 8060 .1 .0 23.8 24.1 99
SPRING CREEK DIVIDE 9000 .1 .0 41.0 38.3 107
TRIPLE PEAK 8500 .1 .0 41.7 37.4 111
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Basin wide percent of average * 107
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 23.1 21.0 110
HEWINTA 9519 .0 .0 100 23.4 26.6 88
HICKERSON PARK 9145 .0 .0 100 23.1 18.5 125
HOLE-IN-ROCK 9150 .0 .0 100 19.5 18.4 106
INDIAN CREEK 9425 .1 .0 34.1 37.1 92
KELLEY R.S. 8180 .3 .0 30.6 30.5 100
STEEL CREEK PARK 10200 .0 .0 100 28.3 29.7 95
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Basin wide percent of average * 100
UPPER BEAR RIVER
BUG LAKE 7950 .0 .0 100 27.8 29.3 95
HAYDEN FORK 9212 .0 .0 100 34.1 34.3 99
KELLEY R.S. 8180 .3 .0 30.6 30.5 100
LILY LAKE 9156 .0 .0 100 28.2 29.6 95
MONTE CRISTO 8960 .0 .0 100 39.7 38.9 102
SALT RIVER SUMMIT 7760 .2 .0 28.3 28.6 99
TRIAL LAKE 9992 .0 .0 100 38.9 40.3 97
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Basin wide percent of average * 98
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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.