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 15 , 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 32.3 111
COTTONWOOD CREEK 7670 .0 .0 100 -M 41.7 *
GRAND TARGHEE 9260 .0 -M * 51.4 -M *
GRANITE CREEK 6770 .0 .0 100 33.9 29.8 114
GRASSY LAKE 7265 .1 .0 58.4 52.4 111
GROS VENTRE SUMMIT 8750 .1 .0 22.1 23.9 92
GUNSIGHT PASS 9820 .2 -M * 24.1 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 50.0 52.2 96
PHILLIPS BENCH 8200 .0 .0 100 47.2 42.7 111
SALT RIVER SUMMIT 7760 -M .0 * -M 28.7 *
SNAKE RIVER STATION 6920 .0 .0 100 37.7 34.3 110
SPRING CREEK DIVIDE 9000 -M .0 * 33.7 38.4 88
THUMB DIVIDE 7980 .2 .0 30.6 29.6 103
TOGWOTEE PASS 9580 .0 .0 100 43.5 39.4 110
TWO OCEAN PLATEAU 9240 .2 .0 46.5 43.8 106
WILLOW CREEK 8380 .0 .0 100 56.2 50.2 112
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Basin wide percent of average * 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .1 0 37.0 34.2 108
BLACK BEAR 8170 .0 .1 0 58.4 58.4 100
CANYON 7870 .0 .0 100 30.3 26.8 113
FISHER CREEK 9100 .0 .0 100 56.3 56.8 99
MADISON PLATEAU 7750 .0 .0 100 45.1 41.0 110
NORTHEAST ENTRANCE 7350 .0 .0 100 23.3 25.0 93
PARKER PEAK 9400 .0 .1 0 42.6 29.9 142
SYLVAN LAKE 8420 .0 .1 0 42.3 36.2 117
THUMB DIVIDE 7980 .2 .0 30.6 29.6 103
TWO OCEAN PLATEAU 9240 .2 .0 46.5 43.8 106
WHISKEY CREEK 6800 .0 .0 100 36.5 34.2 107
WHITE MILL 8700 .1 .0 41.0 44.1 93
WOLVERINE 7650 .0 .0 100 24.7 24.7 100
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Basin wide percent of average 0 106
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 28.8 28.7 100
COLD SPRINGS 9630 .0 .0 100 20.6 22.9 90
DEER PARK 9700 .0 .0 100 33.4 37.1 90
HOBBS PARK 10100 .0 .1 0 27.5 27.4 100
LITTLE WARM 9370 .0 .1 0 25.6 26.4 97
SOUTH PASS 9040 .0 .0 100 30.0 31.1 96
ST. LAWRENCE ALT 8620 .0 .0 100 18.8 20.6 91
TOGWOTEE PASS 9580 .0 .0 100 43.5 39.4 110
TOWNSEND CREEK 8700 .0 .1 0 24.6 24.4 101
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Basin wide percent of average 0 98
BIGHORN BASIN
BALD MTN. 9380 .0 .1 0 32.4 32.5 100
BEAR TRAP MEADOW 8200 .0 .1 0 25.5 20.2 126
BLACKWATER 9780 .0 .2 0 41.0 37.2 110
BONE SPRINGS DIV 9350 .0 .1 0 33.5 30.6 109
EVENING STAR 9200 .0 .2 0 53.7 43.0 125
GRAVE SPRINGS 8550 .0 .1 0 22.2 21.9 101
KIRWIN 9550 .1 .1 100 26.7 26.0 103
MARQUETTE 8760 .0 .2 0 26.4 26.1 101
MIDDLE POWDER 7760 .2 .1 200 24.1 25.1 96
OWL CREEK 8975 .0 .1 0 17.6 17.1 103
POWDER RIVER PASS 9480 .0 .1 0 30.8 26.3 117
SHELL CREEK 9580 1.2 .1 1200 32.0 28.0 114
SYLVAN LAKE 8420 .0 .1 0 42.3 36.2 117
SYLVAN ROAD 7120 .1 .0 32.8 29.4 112
TIMBER CREEK 7950 .0 .1 0 24.0 20.9 115
YOUNTS PEAK 8350 .0 .0 100 28.6 30.0 95
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Basin wide percent of average 88 110
SHOSHONE RIVER
BLACKWATER 9780 .0 .2 0 41.0 37.2 110
EVENING STAR 9200 .0 .2 0 53.7 43.0 125
KIRWIN 9550 .1 .1 100 26.7 26.0 103
MARQUETTE 8760 .0 .2 0 26.4 26.1 101
SYLVAN LAKE 8420 .0 .1 0 42.3 36.2 117
SYLVAN ROAD 7120 .1 .0 32.8 29.4 112
YOUNTS PEAK 8350 .0 .0 100 28.6 30.0 95
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Basin wide percent of average 13 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 25.5 20.2 126
BIG GOOSE 7990 .0 .0 100 27.5 21.8 126
BONE SPRINGS DIV 9350 .0 .1 0 33.5 30.6 109
BURGESS JUNCTION 7880 .0 .1 0 30.6 25.4 120
CLOUD PEAK RESERVOIR 9860 .0 .1 0 36.3 29.7 122
DOME LAKE 8880 .0 .1 0 32.8 27.7 118
GRAVE SPRINGS 8550 .0 .1 0 22.2 21.9 101
HANSEN SAWMILL 8360 .0 .2 0 27.4 21.2 129
MIDDLE POWDER 7760 .2 .1 200 24.1 25.1 96
POWDER RIVER PASS 9480 .0 .1 0 30.8 26.3 117
SUCKER CREEK 8880 .0 .1 0 36.0 28.8 125
TIE CREEK 6870 .0 .0 100 28.3 23.9 118
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Basin wide percent of average 18 117
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 30.2 26.1 116
COLE CANYON 5910 .0 .0 100 29.4 21.9 134
NORTH RAPID CREEK 6130 .0 .0 100 36.3 24.5 148
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Basin wide percent of average * 132
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 40.4 37.1 109
DIVIDE PEAK 8880 .1 .0 36.1 32.4 111
ELK RIVER 8700 .3 .0 34.4 31.4 110
JOE WRIGHT 10120 .2 .0 45.6 43.3 105
NORTH FRENCH CREEK 10130 -M .0 * -M 41.4 *
OLD BATTLE 10000 -M .0 * -M 50.2 *
SAGE CREEK BASIN 7850 .0 .0 100 26.2 18.8 139
SOUTH BRUSH CREEK 8440 .1 .0 26.9 29.9 90
TOWER 10500 .0 .0 100 57.1 57.0 100
WEBBER SPRINGS 9250 .0 .0 100 45.2 40.4 112
WILLOW CREEK PASS 9540 .1 .0 28.6 25.6 112
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Basin wide percent of average * 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 33.1 37.5 88
CASPER MTN. 7900 .0 .0 100 33.3 29.3 114
DEADMAN HILL 10220 .0 .0 100 32.0 30.6 105
DEER PARK 9700 .0 .0 100 33.4 37.1 90
LAPRELE CREEK 8375 -M .0 * 24.1 26.8 90
RENO HILL 8400 .0 .0 100 35.0 30.3 116
ROACH 9700 .0 .0 100 34.6 32.5 106
SAND LAKE 10050 .0 .0 100 46.6 40.7 114
SOUTH PASS 9040 .0 .0 100 30.0 31.1 96
WINDY PEAK 7900 .4 .0 23.3 23.0 101
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Basin wide percent of average * 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 25.3 24.7 102
DIVIDE PEAK 8880 .1 .0 36.1 32.4 111
OLD BATTLE 10000 -M .0 * -M 50.2 *
SANDSTONE RS 8150 -M .0 * 32.9 29.9 110
WHISKEY PARK 8950 .0 .0 100 -M 43.7 *
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Basin wide percent of average * 108
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 21.7 23.9 91
BLIND BULL SUM 8650 .0 .0 100 26.7 33.4 80
EAST RIM DIVIDE 7930 .0 .0 100 17.0 20.5 83
ELKHART PARK G.S. 9400 .1 .0 19.6 25.2 78
GROS VENTRE SUMMIT 8750 .1 .0 22.1 23.9 92
GUNSIGHT PASS 9820 .2 -M * 24.1 -M *
KENDALL R.S. 7740 .0 .0 100 20.2 23.3 87
LOOMIS PARK 8240 .0 .0 100 25.7 28.0 92
NEW FORK LAKE 8340 .2 .0 16.8 21.2 79
SNIDER BASIN 8060 .1 .0 20.4 24.2 84
SPRING CREEK DIVIDE 9000 -M .0 * 33.7 38.4 88
TRIPLE PEAK 8500 -M .0 * 41.6 37.5 111
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Basin wide percent of average * 89
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 16.9 21.1 80
HEWINTA 9519 .0 .0 100 29.7 26.8 111
HICKERSON PARK 9145 .0 .0 100 22.1 18.6 119
HOLE-IN-ROCK 9150 .0 .0 100 20.3 18.5 110
INDIAN CREEK 9425 .4 .0 32.7 37.3 88
KELLEY R.S. 8180 .3 .0 26.1 30.6 85
STEEL CREEK PARK 10200 .8 .0 32.2 29.8 108
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Basin wide percent of average * 99
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 25.6 29.4 87
HAYDEN FORK 9212 .0 .0 100 34.7 34.5 101
KELLEY R.S. 8180 .3 .0 26.1 30.6 85
LILY LAKE 9156 .0 .0 100 28.4 29.7 96
MONTE CRISTO 8960 .0 .0 100 35.2 39.0 90
SALT RIVER SUMMIT 7760 -M .0 * -M 28.7 *
TRIAL LAKE 9992 -M .1 * 36.9 40.5 91
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Basin wide percent of average * 92
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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.