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 23 , 2008
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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 36.0 32.8 110
COTTONWOOD CREEK 7670 .0 .0 100 36.1 42.3 85
GRAND TARGHEE 9260 .0 -M * 51.9 -M *
GRANITE CREEK 6770 .1 .0 34.6 30.2 115
GRASSY LAKE 7265 .1 .0 58.9 53.1 111
GROS VENTRE SUMMIT 8750 .2 .0 22.8 24.5 93
GUNSIGHT PASS 9820 .3 -M * 24.9 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 51.1 52.8 97
PHILLIPS BENCH 8200 .0 .0 100 47.6 43.3 110
SALT RIVER SUMMIT 7760 .0 .0 100 24.7 29.2 85
SNAKE RIVER STATION 6920 .0 .0 100 38.1 34.8 109
SPRING CREEK DIVIDE 9000 .0 .0 100 34.6 38.9 89
THUMB DIVIDE 7980 .2 .0 30.6 30.0 102
TOGWOTEE PASS 9580 .0 .0 100 44.0 40.1 110
TWO OCEAN PLATEAU 9240 .2 .0 47.0 44.5 106
WILLOW CREEK 8380 .6 .0 57.3 51.0 112
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Basin wide percent of average * 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .2 0 37.2 34.7 107
BLACK BEAR 8170 .0 .1 0 59.2 59.0 100
CANYON 7870 .0 .0 100 30.5 27.2 112
FISHER CREEK 9100 .4 .1 400 56.8 57.5 99
MADISON PLATEAU 7750 .0 .1 0 45.6 41.6 110
NORTHEAST ENTRANCE 7350 .0 .0 100 23.6 25.5 93
PARKER PEAK 9400 .0 .3 0 42.8 30.4 141
SYLVAN LAKE 8420 .0 .1 0 42.6 36.7 116
THUMB DIVIDE 7980 .2 .0 30.6 30.0 102
TWO OCEAN PLATEAU 9240 .2 .0 47.0 44.5 106
WHISKEY CREEK 6800 .0 .0 100 36.8 34.8 106
WHITE MILL 8700 .0 .1 0 41.2 44.8 92
WOLVERINE 7650 .0 .0 100 24.8 25.2 98
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Basin wide percent of average 40 105
WIND RIVER
BURROUGHS CREEK 8750 .0 .1 0 28.6 29.3 98
COLD SPRINGS 9630 .0 .1 0 21.1 23.5 90
DEER PARK 9700 .0 .6 0 33.8 37.5 90
HOBBS PARK 10100 .0 .2 0 27.7 27.9 99
LITTLE WARM 9370 .0 .1 0 26.2 27.0 97
SOUTH PASS 9040 .0 .1 0 30.5 31.5 97
ST. LAWRENCE ALT 8620 .0 .1 0 18.9 21.1 90
TOGWOTEE PASS 9580 .0 .0 100 44.0 40.1 110
TOWNSEND CREEK 8700 .0 .1 0 24.8 25.0 99
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Basin wide percent of average 0 97
BIGHORN BASIN
BALD MTN. 9380 .0 .2 0 32.6 33.2 98
BEAR TRAP MEADOW 8200 .0 .1 0 25.5 20.8 123
BLACKWATER 9780 .0 .3 0 41.2 37.9 109
BONE SPRINGS DIV 9350 .0 .2 0 34.3 31.5 109
EVENING STAR 9200 .0 .2 0 54.1 43.7 124
GRAVE SPRINGS 8550 .0 .1 0 22.3 22.4 100
KIRWIN 9550 .0 .3 0 27.0 26.7 101
MARQUETTE 8760 .0 .3 0 26.4 26.8 99
MIDDLE POWDER 7760 .0 .2 0 24.3 25.7 95
OWL CREEK 8975 .0 .2 0 17.7 17.6 101
POWDER RIVER PASS 9480 .0 .2 0 30.9 26.9 115
SHELL CREEK 9580 .0 .4 0 32.8 28.7 114
SYLVAN LAKE 8420 .0 .1 0 42.6 36.7 116
SYLVAN ROAD 7120 .0 .0 100 33.0 29.9 110
TIMBER CREEK 7950 .0 .2 0 24.0 21.5 112
YOUNTS PEAK 8350 .0 .1 0 29.0 30.7 94
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Basin wide percent of average 0 108
SHOSHONE RIVER
BLACKWATER 9780 .0 .3 0 41.2 37.9 109
EVENING STAR 9200 .0 .2 0 54.1 43.7 124
KIRWIN 9550 .0 .3 0 27.0 26.7 101
MARQUETTE 8760 .0 .3 0 26.4 26.8 99
SYLVAN LAKE 8420 .0 .1 0 42.6 36.7 116
SYLVAN ROAD 7120 .0 .0 100 33.0 29.9 110
YOUNTS PEAK 8350 .0 .1 0 29.0 30.7 94
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Basin wide percent of average 0 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 25.5 20.8 123
BIG GOOSE 7990 .0 .0 100 27.6 22.4 123
BONE SPRINGS DIV 9350 .0 .2 0 34.3 31.5 109
BURGESS JUNCTION 7880 .0 .1 0 30.6 26.0 118
CLOUD PEAK RESERVOIR 9860 .0 .0 100 36.5 30.5 120
DOME LAKE 8880 .0 .2 0 33.3 28.4 117
GRAVE SPRINGS 8550 .0 .1 0 22.3 22.4 100
HANSEN SAWMILL 8360 .0 .1 0 27.8 21.8 128
MIDDLE POWDER 7760 .0 .2 0 24.3 25.7 95
POWDER RIVER PASS 9480 .0 .2 0 30.9 26.9 115
SUCKER CREEK 8880 .0 .2 0 36.1 29.5 122
TIE CREEK 6870 .0 .1 0 28.4 24.5 116
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Basin wide percent of average 0 115
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 30.4 26.4 115
COLE CANYON 5910 .0 .0 100 29.8 22.3 134
NORTH RAPID CREEK 6130 .0 .0 100 36.5 24.7 148
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Basin wide percent of average * 132
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 40.8 37.6 109
DIVIDE PEAK 8880 .2 .0 36.8 32.9 112
ELK RIVER 8700 .3 .0 35.0 31.9 110
JOE WRIGHT 10120 .2 .0 -M 44.1 *
NORTH FRENCH CREEK 10130 -M .0 * 45.7 41.9 109
OLD BATTLE 10000 -M .0 * 56.9 50.8 112
SAGE CREEK BASIN 7850 .0 .0 100 26.8 19.1 140
SOUTH BRUSH CREEK 8440 .1 .0 27.7 30.5 91
TOWER 10500 .0 .0 100 57.6 57.6 100
WEBBER SPRINGS 9250 .0 .0 100 46.2 41.1 112
WILLOW CREEK PASS 9540 .1 .0 29.1 26.0 112
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Basin wide percent of average * 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 33.3 38.0 88
CASPER MTN. 7900 .0 .0 100 33.3 29.7 112
DEADMAN HILL 10220 .1 .0 32.3 31.1 104
DEER PARK 9700 .0 .6 0 33.8 37.5 90
LAPRELE CREEK 8375 -M .0 * 24.5 27.2 90
RENO HILL 8400 .0 .0 100 35.3 30.8 115
ROACH 9700 .1 .0 35.4 33.0 107
SAND LAKE 10050 .2 .0 46.8 41.2 114
SOUTH PASS 9040 .0 .1 0 30.5 31.5 97
WINDY PEAK 7900 .3 .0 23.3 23.4 100
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Basin wide percent of average 0 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 25.8 25.0 103
DIVIDE PEAK 8880 .2 .0 36.8 32.9 112
OLD BATTLE 10000 -M .0 * 56.9 50.8 112
SANDSTONE RS 8150 .4 .0 33.8 30.4 111
WHISKEY PARK 8950 .0 .0 100 50.1 44.3 113
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Basin wide percent of average * 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 22.2 24.3 91
BLIND BULL SUM 8650 1.9 .0 28.2 33.9 83
EAST RIM DIVIDE 7930 .0 .0 100 17.4 20.9 83
ELKHART PARK G.S. 9400 .5 .0 20.6 25.8 80
GROS VENTRE SUMMIT 8750 .2 .0 22.8 24.5 93
GUNSIGHT PASS 9820 .3 -M * 24.9 -M *
KENDALL R.S. 7740 .1 .0 20.9 23.7 88
LOOMIS PARK 8240 .0 .0 100 26.4 28.6 92
NEW FORK LAKE 8340 .2 .0 17.6 21.6 81
SNIDER BASIN 8060 .2 .0 20.8 24.6 85
SPRING CREEK DIVIDE 9000 .0 .0 100 34.6 38.9 89
TRIPLE PEAK 8500 -M .0 * 42.5 38.0 112
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Basin wide percent of average * 90
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 17.5 21.4 82
HEWINTA 9519 .0 .0 100 29.8 27.3 109
HICKERSON PARK 9145 .0 .0 100 22.0 19.0 116
HOLE-IN-ROCK 9150 .0 .0 100 20.4 19.0 107
INDIAN CREEK 9425 .2 .0 32.9 37.7 87
KELLEY R.S. 8180 .2 .0 26.5 31.0 85
STEEL CREEK PARK 10200 .5 .1 500 32.4 30.3 107
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Basin wide percent of average 500 98
UPPER BEAR RIVER
BUG LAKE 7950 .1 .1 100 25.9 29.9 87
HAYDEN FORK 9212 .0 .0 100 35.3 35.1 101
KELLEY R.S. 8180 .2 .0 26.5 31.0 85
LILY LAKE 9156 .0 .0 100 28.7 30.2 95
MONTE CRISTO 8960 .1 .0 35.8 39.7 90
SALT RIVER SUMMIT 7760 .0 .0 100 24.7 29.2 85
TRIAL LAKE 9992 .1 .2 50 37.3 41.2 91
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Basin wide percent of average 67 91
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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.