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 1 , 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 35.2 31.6 111
COTTONWOOD CREEK 7670 .0 .0 100 -M 40.8 *
GRAND TARGHEE 9260 .0 -M * 50.7 -M *
GRANITE CREEK 6770 .1 .0 33.6 29.2 115
GRASSY LAKE 7265 .1 .0 58.1 51.4 113
GROS VENTRE SUMMIT 8750 .2 .0 21.8 23.0 95
GUNSIGHT PASS 9820 .2 -M * 22.8 -M *
LEWIS LAKE DIVIDE 7850 -M .0 * 49.7 51.3 97
PHILLIPS BENCH 8200 .0 .0 100 46.8 41.8 112
SALT RIVER SUMMIT 7760 -M .0 * -M 28.0 *
SNAKE RIVER STATION 6920 .0 .0 100 37.5 33.6 112
SPRING CREEK DIVIDE 9000 -M .0 * -M 37.5 *
THUMB DIVIDE 7980 .2 .0 30.3 29.1 104
TOGWOTEE PASS 9580 .0 .0 100 42.7 38.5 111
TWO OCEAN PLATEAU 9240 .2 .0 45.6 42.9 106
WILLOW CREEK 8380 .0 .0 100 55.6 49.1 113
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Basin wide percent of average * 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .1 .0 35.4 33.4 106
BLACK BEAR 8170 .0 .0 100 58.3 57.3 102
CANYON 7870 .0 .0 100 29.0 26.0 112
FISHER CREEK 9100 .1 .0 55.2 55.5 99
MADISON PLATEAU 7750 .0 .0 100 45.0 40.1 112
NORTHEAST ENTRANCE 7350 .0 .0 100 22.9 24.1 95
PARKER PEAK 9400 .0 .0 100 41.2 29.2 141
SYLVAN LAKE 8420 .0 .0 100 41.7 35.4 118
THUMB DIVIDE 7980 .2 .0 30.3 29.1 104
TWO OCEAN PLATEAU 9240 .2 .0 45.6 42.9 106
WHISKEY CREEK 6800 .0 .0 100 36.4 33.1 110
WHITE MILL 8700 .1 .0 40.2 43.0 93
WOLVERINE 7650 .1 .0 23.9 23.9 100
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Basin wide percent of average * 107
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 27.3 27.8 98
COLD SPRINGS 9630 .0 .0 100 20.1 22.0 91
DEER PARK 9700 .0 .0 100 32.4 36.1 90
HOBBS PARK 10100 .1 .0 26.8 26.5 101
LITTLE WARM 9370 .0 .0 100 25.0 25.4 98
SOUTH PASS 9040 .1 .0 29.1 30.4 96
ST. LAWRENCE ALT 8620 .1 .0 18.3 20.0 92
TOGWOTEE PASS 9580 .0 .0 100 42.7 38.5 111
TOWNSEND CREEK 8700 .1 .0 23.7 23.5 101
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Basin wide percent of average * 98
BIGHORN BASIN
BALD MTN. 9380 .2 .0 30.0 31.6 95
BEAR TRAP MEADOW 8200 .0 .0 100 23.1 19.4 119
BLACKWATER 9780 .0 .0 100 39.5 36.2 109
BONE SPRINGS DIV 9350 .0 .0 100 30.9 29.5 105
EVENING STAR 9200 .1 .0 52.3 42.0 125
GRAVE SPRINGS 8550 .1 .0 20.8 21.3 98
KIRWIN 9550 .0 .0 100 25.7 24.8 104
MARQUETTE 8760 .0 .0 100 24.6 24.9 99
MIDDLE POWDER 7760 .2 .0 22.0 24.3 91
OWL CREEK 8975 .0 .0 100 15.9 16.3 98
POWDER RIVER PASS 9480 .0 .0 100 -M 25.4 *
SHELL CREEK 9580 .0 .0 100 28.7 27.1 106
SYLVAN LAKE 8420 .0 .0 100 41.7 35.4 118
SYLVAN ROAD 7120 .1 .0 32.2 28.6 113
TIMBER CREEK 7950 .0 .0 100 22.2 19.9 112
YOUNTS PEAK 8350 .0 .0 100 27.6 28.9 96
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Basin wide percent of average * 107
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100 39.5 36.2 109
EVENING STAR 9200 .1 .0 52.3 42.0 125
KIRWIN 9550 .0 .0 100 25.7 24.8 104
MARQUETTE 8760 .0 .0 100 24.6 24.9 99
SYLVAN LAKE 8420 .0 .0 100 41.7 35.4 118
SYLVAN ROAD 7120 .1 .0 32.2 28.6 113
YOUNTS PEAK 8350 .0 .0 100 27.6 28.9 96
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Basin wide percent of average * 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 23.1 19.4 119
BIG GOOSE 7990 .0 .0 100 25.1 21.0 120
BONE SPRINGS DIV 9350 .0 .0 100 30.9 29.5 105
BURGESS JUNCTION 7880 .0 .0 100 28.5 24.6 116
CLOUD PEAK RESERVOIR 9860 .1 .0 34.1 28.7 119
DOME LAKE 8880 .0 .0 100 29.9 26.7 112
GRAVE SPRINGS 8550 .1 .0 20.8 21.3 98
HANSEN SAWMILL 8360 .0 .0 100 25.4 20.3 125
MIDDLE POWDER 7760 .2 .0 22.0 24.3 91
POWDER RIVER PASS 9480 .0 .0 100 -M 25.4 *
SUCKER CREEK 8880 .0 .0 100 33.2 27.9 119
TIE CREEK 6870 .0 .0 100 26.1 23.1 113
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Basin wide percent of average * 112
BELLE FOURCHE
BLIND PARK 6890 .1 .0 28.5 25.5 112
COLE CANYON 5910 .4 .0 27.2 21.2 128
NORTH RAPID CREEK 6130 .0 .0 100 34.8 24.1 144
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Basin wide percent of average * 128
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 39.1 36.5 107
DIVIDE PEAK 8880 .0 .0 100 34.2 31.7 108
ELK RIVER 8700 .3 .0 33.1 30.7 108
JOE WRIGHT 10120 -M .0 * 43.6 42.2 103
NORTH FRENCH CREEK 10130 .0 .0 100 43.1 40.5 106
OLD BATTLE 10000 -M .0 * 53.6 49.3 109
SAGE CREEK BASIN 7850 .0 .0 100 24.4 18.4 133
SOUTH BRUSH CREEK 8440 .1 .0 25.2 29.0 87
TOWER 10500 .0 .0 100 55.8 56.0 100
WEBBER SPRINGS 9250 .0 .0 100 43.1 39.5 109
WILLOW CREEK PASS 9540 .3 .0 26.7 24.8 108
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Basin wide percent of average * 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 33.4 36.7 91
CASPER MTN. 7900 .0 .0 100 31.6 28.7 110
DEADMAN HILL 10220 -M .0 * 30.8 29.8 103
DEER PARK 9700 .0 .0 100 32.4 36.1 90
LAPRELE CREEK 8375 .0 .0 100 23.6 26.0 91
RENO HILL 8400 .0 .0 100 34.1 29.7 115
ROACH 9700 .1 .0 33.4 31.8 105
SAND LAKE 10050 .1 .0 44.6 40.0 112
SOUTH PASS 9040 .1 .0 29.1 30.4 96
WINDY PEAK 7900 .3 .0 22.2 22.4 99
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Basin wide percent of average * 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 23.9 24.1 99
DIVIDE PEAK 8880 .0 .0 100 34.2 31.7 108
OLD BATTLE 10000 -M .0 * 53.6 49.3 109
SANDSTONE RS 8150 -M .0 * 31.0 29.2 106
WHISKEY PARK 8950 .0 .0 100 47.9 43.0 111
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Basin wide percent of average * 108
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .1 .0 20.4 23.1 88
BLIND BULL SUM 8650 .0 .0 100 26.1 32.7 80
EAST RIM DIVIDE 7930 .0 .0 100 16.6 19.9 83
ELKHART PARK G.S. 9400 .0 .0 100 18.7 24.2 77
GROS VENTRE SUMMIT 8750 .2 .0 21.8 23.0 95
GUNSIGHT PASS 9820 .2 -M * 22.8 -M *
KENDALL R.S. 7740 .0 .0 100 19.7 22.5 88
LOOMIS PARK 8240 .0 .0 100 25.2 27.1 93
NEW FORK LAKE 8340 .2 .0 16.2 20.4 79
SNIDER BASIN 8060 .1 .0 20.2 23.6 86
SPRING CREEK DIVIDE 9000 -M .0 * -M 37.5 *
TRIPLE PEAK 8500 -M .0 * 41.1 36.7 112
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Basin wide percent of average * 89
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 -M 20.6 *
HEWINTA 9519 .0 .0 100 28.7 25.8 111
HICKERSON PARK 9145 .0 .0 100 20.3 17.8 114
HOLE-IN-ROCK 9150 .0 .0 100 18.4 17.7 104
INDIAN CREEK 9425 .3 .0 31.8 36.5 87
KELLEY R.S. 8180 .2 .0 25.3 29.9 85
STEEL CREEK PARK 10200 .4 .0 31.0 28.9 107
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Basin wide percent of average * 99
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 24.9 28.7 87
HAYDEN FORK 9212 .1 .0 33.0 33.5 99
KELLEY R.S. 8180 .2 .0 25.3 29.9 85
LILY LAKE 9156 .0 .0 100 26.6 28.9 92
MONTE CRISTO 8960 .0 .0 100 34.5 38.1 91
SALT RIVER SUMMIT 7760 -M .0 * -M 28.0 *
TRIAL LAKE 9992 -M .0 * 35.3 39.4 90
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Basin wide percent of average * 90
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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.