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 WEDNESDAY: SEPTEMBER 30 , 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 32.8 33.1 99
COTTONWOOD CREEK 7670 .0 .0 100 50.1 42.7 117
GRAND TARGHEE 9260 .1 -M * 53.5 -M *
GRANITE CREEK 6770 .1 .0 33.0 30.5 108
GRASSY LAKE 7265 .1 .0 53.8 53.7 100
GROS VENTRE SUMMIT 8750 .1 .0 26.6 24.9 107
GUNSIGHT PASS 9820 .0 -M * 31.3 -M *
LEWIS LAKE DIVIDE 7850 .1 .0 51.5 53.2 97
PHILLIPS BENCH 8200 .1 .0 45.4 43.7 104
SALT RIVER SUMMIT 7760 .3 .0 28.6 29.5 97
SNAKE RIVER STATION 6920 .0 .0 100 37.1 35.2 105
SPRING CREEK DIVIDE 9000 .1 .0 41.6 39.3 106
THUMB DIVIDE 7980 .1 .0 35.2 30.3 116
TOGWOTEE PASS 9580 .0 .0 100 46.8 40.6 115
TWO OCEAN PLATEAU 9240 .0 .0 100 48.7 45.0 108
WILLOW CREEK 8380 .1 .0 60.8 51.6 118
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Basin wide percent of average * 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .4 0 37.7 35.1 107
BLACK BEAR 8170 .0 .2 0 53.9 59.5 91
CANYON 7870 .0 .1 0 29.4 27.6 107
FISHER CREEK 9100 .0 .3 0 54.0 58.1 93
MADISON PLATEAU 7750 .0 .1 0 39.2 42.0 93
NORTHEAST ENTRANCE 7350 .0 .0 100 26.4 25.9 102
PARKER PEAK 9400 .0 .5 0 33.4 30.9 108
SYLVAN LAKE 8420 .0 .3 0 40.1 37.2 108
THUMB DIVIDE 7980 .1 .0 35.2 30.3 116
TWO OCEAN PLATEAU 9240 .0 .0 100 48.7 45.0 108
WHISKEY CREEK 6800 .0 .0 100 31.7 35.2 90
WHITE MILL 8700 .0 .2 0 41.3 45.2 91
WOLVERINE 7650 .0 .0 100 24.9 25.6 97
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Basin wide percent of average 0 100
WIND RIVER
BURROUGHS CREEK 8750 .0 .2 0 31.2 29.8 105
COLD SPRINGS 9630 .0 .2 0 22.5 23.9 94
DEER PARK 9700 .0 .7 0 33.1 37.9 87
HOBBS PARK 10100 .0 .2 0 29.4 28.4 104
LITTLE WARM 9370 .0 .1 0 28.7 27.4 105
SOUTH PASS 9040 .0 .2 0 28.9 31.9 91
ST. LAWRENCE ALT 8620 .0 .1 0 21.2 21.4 99
TOGWOTEE PASS 9580 .0 .0 100 46.8 40.6 115
TOWNSEND CREEK 8700 .0 .1 0 25.6 25.5 100
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Basin wide percent of average 0 100
BIGHORN BASIN
BALD MTN. 9380 .0 .6 0 30.2 33.8 89
BEAR TRAP MEADOW 8200 .0 .1 0 23.4 21.3 110
BLACKWATER 9780 .0 .6 0 40.0 38.4 104
BONE SPRINGS DIV 9350 .0 .4 0 29.2 32.1 91
EVENING STAR 9200 .0 .4 0 49.5 44.1 112
GRAVE SPRINGS 8550 .0 .1 0 19.5 22.8 86
KIRWIN 9550 .0 .4 0 30.4 27.2 112
MARQUETTE 8760 .0 .4 0 21.6 27.2 79
MIDDLE POWDER 7760 .0 .2 0 25.9 26.2 99
OWL CREEK 8975 .0 .2 0 21.4 18.0 119
POWDER RIVER PASS 9480 .0 .3 0 29.6 27.4 108
SHELL CREEK 9580 .0 .7 0 30.3 29.2 104
SYLVAN LAKE 8420 .0 .3 0 40.1 37.2 108
SYLVAN ROAD 7120 .0 .0 100 33.2 30.2 110
TIMBER CREEK 7950 .0 .2 0 20.1 22.0 91
YOUNTS PEAK 8350 .0 .1 0 29.1 31.1 94
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Basin wide percent of average 0 101
SHOSHONE RIVER
BLACKWATER 9780 .0 .6 0 40.0 38.4 104
EVENING STAR 9200 .0 .4 0 49.5 44.1 112
KIRWIN 9550 .0 .4 0 30.4 27.2 112
MARQUETTE 8760 .0 .4 0 21.6 27.2 79
SYLVAN LAKE 8420 .0 .3 0 40.1 37.2 108
SYLVAN ROAD 7120 .0 .0 100 33.2 30.2 110
YOUNTS PEAK 8350 .0 .1 0 29.1 31.1 94
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Basin wide percent of average 0 104
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 23.4 21.3 110
BIG GOOSE 7990 .0 .0 100 24.2 22.9 106
BONE SPRINGS DIV 9350 .0 .4 0 29.2 32.1 91
BURGESS JUNCTION 7880 .0 .3 0 25.2 26.5 95
CLOUD PEAK RESERVOIR 9860 .0 .0 100 31.7 31.1 102
DOME LAKE 8880 .0 .3 0 29.0 28.9 100
GRAVE SPRINGS 8550 .0 .1 0 19.5 22.8 86
HANSEN SAWMILL 8360 .0 .1 0 21.6 22.2 97
MIDDLE POWDER 7760 .0 .2 0 25.9 26.2 99
POWDER RIVER PASS 9480 .0 .3 0 29.6 27.4 108
SUCKER CREEK 8880 .0 .2 0 32.2 30.0 107
TIE CREEK 6870 .0 .1 0 29.3 25.0 117
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Basin wide percent of average 0 101
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 28.9 26.7 108
COLE CANYON 5910 .0 .0 100 28.0 22.7 123
NORTH RAPID CREEK 6130 .0 .0 100 25.1 24.9 101
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Basin wide percent of average * 110
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 40.3 38.0 106
DIVIDE PEAK 8880 .1 .1 100 42.3 33.3 127
ELK RIVER 8700 .0 .0 100 33.8 32.3 105
JOE WRIGHT 10120 .3 .0 45.8 44.7 102
NORTH FRENCH CREEK 10130 .1 .0 49.4 42.4 117
OLD BATTLE 10000 .1 .1 100 57.1 51.3 111
SAGE CREEK BASIN 7850 .1 .0 26.2 19.3 136
SOUTH BRUSH CREEK 8440 .1 .0 28.7 31.0 93
TOWER 10500 .1 .0 61.7 58.2 106
WEBBER SPRINGS 9250 .0 .1 0 44.1 41.6 106
WILLOW CREEK PASS 9540 .0 .0 100 24.9 26.3 95
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Basin wide percent of average 67* 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .1 .1 100 35.1 38.4 91
CASPER MTN. 7900 .1 .0 28.6 30.1 95
DEADMAN HILL 10220 -M .2 * 30.4 31.6 96
DEER PARK 9700 .0 .7 0 33.1 37.9 87
LAPRELE CREEK 8375 .1 .0 24.4 27.5 89
RENO HILL 8400 .0 .0 100 29.9 31.2 96
ROACH 9700 .1 .0 33.5 33.5 100
SAND LAKE 10050 .1 .3 33 47.2 41.7 113
SOUTH PASS 9040 .0 .2 0 28.9 31.9 91
WINDY PEAK 7900 .1 .0 24.8 23.8 104
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Basin wide percent of average 15 96
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 30.0 25.3 119
DIVIDE PEAK 8880 .1 .1 100 42.3 33.3 127
OLD BATTLE 10000 .1 .1 100 57.1 51.3 111
SANDSTONE RS 8150 .3 .0 32.7 30.7 107
WHISKEY PARK 8950 .1 .0 49.4 44.8 110
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Basin wide percent of average 100* 114
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .1 .0 27.6 24.7 112
BLIND BULL SUM 8650 .0 .0 100 33.8 34.3 99
EAST RIM DIVIDE 7930 .0 .0 100 22.2 21.2 105
ELKHART PARK G.S. 9400 .2 .0 28.6 26.2 109
GROS VENTRE SUMMIT 8750 .1 .0 26.6 24.9 107
GUNSIGHT PASS 9820 .0 -M * 31.3 -M *
KENDALL R.S. 7740 .1 .0 24.9 24.0 104
LOOMIS PARK 8240 .2 .0 31.2 28.9 108
NEW FORK LAKE 8340 .0 .0 100 22.6 22.0 103
SNIDER BASIN 8060 .2 .0 24.5 24.8 99
SPRING CREEK DIVIDE 9000 .1 .0 41.6 39.3 106
TRIPLE PEAK 8500 .2 .0 42.2 38.4 110
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Basin wide percent of average * 106
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 23.8 21.7 110
HEWINTA 9519 .1 .0 24.7 27.7 89
HICKERSON PARK 9145 .0 .0 100 24.7 19.4 127
HOLE-IN-ROCK 9150 .0 .0 100 20.6 19.3 107
INDIAN CREEK 9425 .2 .0 34.7 38.1 91
KELLEY R.S. 8180 .1 .0 31.1 31.3 99
STEEL CREEK PARK 10200 .0 .2 0 29.7 30.8 96
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Basin wide percent of average 0* 101
UPPER BEAR RIVER
BUG LAKE 7950 .1 .2 50 28.0 30.3 92
HAYDEN FORK 9212 .0 .1 0 35.9 35.6 101
KELLEY R.S. 8180 .1 .0 31.1 31.3 99
LILY LAKE 9156 .2 .1 200 29.6 30.6 97
MONTE CRISTO 8960 .0 .1 0 39.8 40.1 99
SALT RIVER SUMMIT 7760 .3 .0 28.6 29.5 97
TRIAL LAKE 9992 .1 .3 33 41.2 41.7 99
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Basin wide percent of average 50 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.
