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 THURSDAY: SEPTEMBER 24 , 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 32.9 32.8 100
COTTONWOOD CREEK 7670 .0 .0 100 50.1 42.3 118
GRAND TARGHEE 9260 .1 -M * 53.5 -M *
GRANITE CREEK 6770 .1 .0 32.9 30.2 109
GRASSY LAKE 7265 .1 .0 53.8 53.1 101
GROS VENTRE SUMMIT 8750 .0 .0 100 26.6 24.5 109
GUNSIGHT PASS 9820 .0 -M * 31.1 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 51.4 52.8 97
PHILLIPS BENCH 8200 .1 .0 45.4 43.3 105
SALT RIVER SUMMIT 7760 .2 .0 28.6 29.2 98
SNAKE RIVER STATION 6920 .0 .0 100 37.0 34.8 106
SPRING CREEK DIVIDE 9000 .1 .0 41.6 38.9 107
THUMB DIVIDE 7980 .0 .0 100 35.1 30.0 117
TOGWOTEE PASS 9580 .0 .0 100 46.8 40.1 117
TWO OCEAN PLATEAU 9240 .0 .0 100 48.6 44.5 109
WILLOW CREEK 8380 .0 .0 100 60.9 51.0 119
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Basin wide percent of average * 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .2 0 37.6 34.7 108
BLACK BEAR 8170 .0 .1 0 53.8 59.0 91
CANYON 7870 .0 .0 100 29.2 27.2 107
FISHER CREEK 9100 .0 .1 0 54.0 57.5 94
MADISON PLATEAU 7750 .0 .1 0 39.2 41.6 94
NORTHEAST ENTRANCE 7350 .0 .0 100 26.4 25.5 104
PARKER PEAK 9400 .0 .3 0 33.3 30.4 110
SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109
THUMB DIVIDE 7980 .0 .0 100 35.1 30.0 117
TWO OCEAN PLATEAU 9240 .0 .0 100 48.6 44.5 109
WHISKEY CREEK 6800 .0 .0 100 31.8 34.8 91
WHITE MILL 8700 .0 .1 0 41.3 44.8 92
WOLVERINE 7650 .0 .0 100 24.9 25.2 99
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Basin wide percent of average 0 101
WIND RIVER
BURROUGHS CREEK 8750 .0 .1 0 30.9 29.3 105
COLD SPRINGS 9630 .0 .1 0 22.5 23.5 96
DEER PARK 9700 .0 .6 0 33.0 37.5 88
HOBBS PARK 10100 .0 .2 0 29.4 27.9 105
LITTLE WARM 9370 .0 .1 0 28.5 27.0 106
SOUTH PASS 9040 .0 .1 0 28.8 31.5 91
ST. LAWRENCE ALT 8620 .0 .1 0 21.1 21.1 100
TOGWOTEE PASS 9580 .0 .0 100 46.8 40.1 117
TOWNSEND CREEK 8700 .0 .1 0 25.7 25.0 103
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Basin wide percent of average 0 101
BIGHORN BASIN
BALD MTN. 9380 .0 .2 0 29.9 33.2 90
BEAR TRAP MEADOW 8200 .0 .1 0 23.3 20.8 112
BLACKWATER 9780 .0 .3 0 40.0 37.9 106
BONE SPRINGS DIV 9350 .0 .2 0 28.8 31.5 91
EVENING STAR 9200 .0 .2 0 49.5 43.7 113
GRAVE SPRINGS 8550 .0 .1 0 19.4 22.4 87
KIRWIN 9550 .0 .3 0 30.4 26.7 114
MARQUETTE 8760 .0 .3 0 21.5 26.8 80
MIDDLE POWDER 7760 .0 .2 0 25.5 25.7 99
OWL CREEK 8975 .0 .2 0 21.4 17.6 122
POWDER RIVER PASS 9480 .0 .2 0 29.5 26.9 110
SHELL CREEK 9580 .0 .4 0 29.9 28.7 104
SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109
SYLVAN ROAD 7120 .0 .0 100 33.2 29.9 111
TIMBER CREEK 7950 .0 .2 0 20.2 21.5 94
YOUNTS PEAK 8350 .0 .1 0 29.1 30.7 95
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Basin wide percent of average 0 102
SHOSHONE RIVER
BLACKWATER 9780 .0 .3 0 40.0 37.9 106
EVENING STAR 9200 .0 .2 0 49.5 43.7 113
KIRWIN 9550 .0 .3 0 30.4 26.7 114
MARQUETTE 8760 .0 .3 0 21.5 26.8 80
SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109
SYLVAN ROAD 7120 .0 .0 100 33.2 29.9 111
YOUNTS PEAK 8350 .0 .1 0 29.1 30.7 95
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Basin wide percent of average 0 105
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 23.3 20.8 112
BIG GOOSE 7990 .0 .0 100 24.1 22.4 108
BONE SPRINGS DIV 9350 .0 .2 0 28.8 31.5 91
BURGESS JUNCTION 7880 .0 .1 0 25.0 26.0 96
CLOUD PEAK RESERVOIR 9860 .0 .0 100 31.5 30.5 103
DOME LAKE 8880 .0 .2 0 28.4 28.4 100
GRAVE SPRINGS 8550 .0 .1 0 19.4 22.4 87
HANSEN SAWMILL 8360 .0 .1 0 21.4 21.8 98
MIDDLE POWDER 7760 .0 .2 0 25.5 25.7 99
POWDER RIVER PASS 9480 .0 .2 0 29.5 26.9 110
SUCKER CREEK 8880 .0 .2 0 32.2 29.5 109
TIE CREEK 6870 .0 .1 0 29.3 24.5 120
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Basin wide percent of average 0 103
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 28.9 26.4 109
COLE CANYON 5910 .0 .0 100 27.7 22.3 124
NORTH RAPID CREEK 6130 .0 .0 100 24.9 24.7 101
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Basin wide percent of average * 111
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 40.2 37.6 107
DIVIDE PEAK 8880 .0 .0 100 42.4 32.9 129
ELK RIVER 8700 .0 .0 100 33.9 31.9 106
JOE WRIGHT 10120 .2 .0 45.4 44.1 103
NORTH FRENCH CREEK 10130 -M .0 * 49.3 41.9 118
OLD BATTLE 10000 .0 .0 100 56.9 50.8 112
SAGE CREEK BASIN 7850 .0 .0 100 26.2 19.1 137
SOUTH BRUSH CREEK 8440 .0 .0 100 28.5 30.5 93
TOWER 10500 .1 .0 61.5 57.6 107
WEBBER SPRINGS 9250 .0 .0 100 44.1 41.1 107
WILLOW CREEK PASS 9540 .1 .0 24.7 26.0 95
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Basin wide percent of average * 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 35.2 38.0 93
CASPER MTN. 7900 .0 .0 100 28.6 29.7 96
DEADMAN HILL 10220 -M .0 * 29.9 31.1 96
DEER PARK 9700 .0 .6 0 33.0 37.5 88
LAPRELE CREEK 8375 .0 .0 100 24.3 27.2 89
RENO HILL 8400 .7 .0 29.9 30.8 97
ROACH 9700 .5 .0 33.5 33.0 102
SAND LAKE 10050 .7 .0 47.0 41.2 114
SOUTH PASS 9040 .0 .1 0 28.8 31.5 91
WINDY PEAK 7900 .1 .0 24.6 23.4 105
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Basin wide percent of average 0 97
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 30.0 25.0 120
DIVIDE PEAK 8880 .0 .0 100 42.4 32.9 129
OLD BATTLE 10000 .0 .0 100 56.9 50.8 112
SANDSTONE RS 8150 .0 .0 100 32.7 30.4 108
WHISKEY PARK 8950 .0 .0 100 49.4 44.3 112
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Basin wide percent of average * 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 27.4 24.3 113
BLIND BULL SUM 8650 .0 .0 100 33.7 33.9 99
EAST RIM DIVIDE 7930 .0 .0 100 22.1 20.9 106
ELKHART PARK G.S. 9400 .1 .0 28.7 25.8 111
GROS VENTRE SUMMIT 8750 .0 .0 100 26.6 24.5 109
GUNSIGHT PASS 9820 .0 -M * 31.1 -M *
KENDALL R.S. 7740 .1 .0 24.8 23.7 105
LOOMIS PARK 8240 .1 .0 31.2 28.6 109
NEW FORK LAKE 8340 .0 .0 100 22.6 21.6 105
SNIDER BASIN 8060 .1 .0 24.3 24.6 99
SPRING CREEK DIVIDE 9000 .1 .0 41.6 38.9 107
TRIPLE PEAK 8500 .1 .0 42.0 38.0 111
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Basin wide percent of average * 107
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 23.6 21.4 110
HEWINTA 9519 .0 .0 100 24.6 27.3 90
HICKERSON PARK 9145 .0 .0 100 24.7 19.0 130
HOLE-IN-ROCK 9150 .0 .0 100 20.6 19.0 108
INDIAN CREEK 9425 .1 .0 34.7 37.7 92
KELLEY R.S. 8180 .4 .0 31.0 31.0 100
STEEL CREEK PARK 10200 .0 .1 0 29.7 30.3 98
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Basin wide percent of average 0 102
UPPER BEAR RIVER
BUG LAKE 7950 .1 .1 100 28.1 29.9 94
HAYDEN FORK 9212 .0 .0 100 35.9 35.1 102
KELLEY R.S. 8180 .4 .0 31.0 31.0 100
LILY LAKE 9156 .1 .0 29.6 30.2 98
MONTE CRISTO 8960 .0 .0 100 40.0 39.7 101
SALT RIVER SUMMIT 7760 .2 .0 28.6 29.2 98
TRIAL LAKE 9992 .1 .2 50 -M 41.2 *
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Basin wide percent of average 67 99
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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.
