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 19 , 2011
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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* 41.5 32.5 128
COTTONWOOD CREEK 7670 .0 .0 100* 58.2 42.0 139
GRAND TARGHEE 9260 .0 -M * 66.8 -M *
GRANITE CREEK 6770 .0 .0 100* 39.1 30.0 130
GRASSY LAKE 7265 .1 .0 * 67.1 52.8 127
GROS VENTRE SUMMIT 8750 .0 .0 100* 27.0 24.2 112
GUNSIGHT PASS 9820 .0 -M * 33.0 -M *
LEWIS LAKE DIVIDE 7850 .1 .0 * 59.8 52.5 114
PHILLIPS BENCH 8200 .0 .0 100* 53.6 43.0 125
SALT RIVER SUMMIT 7760 .1 .0 * 35.2 29.0 121
SNAKE RIVER STATION 6920 .0 .0 100* 44.8 34.5 130
SPRING CREEK DIVIDE 9000 .1 .0 * 49.7 38.7 128
THUMB DIVIDE 7980 .0 .0 100* 36.5 29.8 122
TOGWOTEE PASS 9580 .0 .0 100* 51.5 39.8 129
TWO OCEAN PLATEAU 9240 .1 .0 * 52.0 44.1 118
WILLOW CREEK 8380 .0 .0 100* 67.0 50.6 132
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Basin wide percent of average * 126
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .1 0* 43.3 34.5 126
BLACK BEAR 8170 .0 .1 0* 73.8 58.7 126
CANYON 7870 .0 .0 100* 29.8 27.0 110
FISHER CREEK 9100 .0 .1 0* 62.3 57.2 109
MADISON PLATEAU 7750 .0 .0 100* 52.8 41.3 128
NORTHEAST ENTRANCE 7350 .0 .0 100* 28.1 25.3 111
PARKER PEAK 9400 .0 .2 0* 47.2 30.2 156
SYLVAN LAKE 8420 .0 .1 0* 48.7 36.5 133
THUMB DIVIDE 7980 .0 .0 100* 36.5 29.8 122
TWO OCEAN PLATEAU 9240 .1 .0 * 52.0 44.1 118
WHISKEY CREEK 6800 .0 .0 100* 42.6 34.5 123
WHITE MILL 8700 .0 .1 0* 45.3 44.4 102
WOLVERINE 7650 .0 .0 100* 27.9 25.0 112
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Basin wide percent of average 14* 121
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100* 32.0 29.0 110
CASTLE CREEK 8400 .0 -M * 17.5 -M *
COLD SPRINGS 9630 .0 .0 100* 23.4 23.2 101
DEER PARK 9700 .0 .1 0* 38.4 37.3 103
HOBBS PARK 10100 .0 .2 0* 32.8 27.6 119
LITTLE WARM 9370 .0 .0 100* 27.6 26.7 103
SOUTH PASS 9040 .0 .1 0* 29.2 31.3 93
ST. LAWRENCE ALT 8620 .0 .0 100* 23.2 20.9 111
TOGWOTEE PASS 9580 .0 .0 100* 51.5 39.8 129
TOWNSEND CREEK 8700 .0 .1 0* 26.6 24.7 108
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Basin wide percent of average 0* 109
BIGHORN BASIN
BALD MTN. 9380 .0 .1 0* 38.7 32.9 118
BEAR TRAP MEADOW 8200 .0 .1 0* 22.9 20.5 112
BLACKWATER 9780 .0 .2 0* 46.2 37.6 123
BONE SPRINGS DIV 9350 .0 .0 100* 36.0 31.0 116
EVENING STAR 9200 .0 .2 0* 59.1 43.3 136
GRAVE SPRINGS 8550 .0 .0 100* 24.9 22.2 112
KIRWIN 9550 .0 .1 0* 28.2 26.4 107
MARQUETTE 8760 .0 -M * 22.5 26.4 85
MIDDLE POWDER 7760 .0 .1 0* 26.0 25.4 102
OWL CREEK 8975 .0 .2 0* 16.2 17.4 93
POWDER RIVER PASS 9480 .0 .1 0* 34.1 26.6 128
SHELL CREEK 9580 .0 .2 0* 34.5 28.4 121
SYLVAN LAKE 8420 .0 .1 0* 48.7 36.5 133
SYLVAN ROAD 7120 .0 .0 100* 35.3 29.6 119
TIMBER CREEK 7950 .0 .0 100* 19.4 21.2 92
YOUNTS PEAK 8350 .0 .0 100* 30.4 30.3 100
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Basin wide percent of average 0* 115
SHOSHONE RIVER
BLACKWATER 9780 .0 .2 0* 46.2 37.6 123
EVENING STAR 9200 .0 .2 0* 59.1 43.3 136
KIRWIN 9550 .0 .1 0* 28.2 26.4 107
MARQUETTE 8760 .0 -M * 22.5 26.4 85
SYLVAN LAKE 8420 .0 .1 0* 48.7 36.5 133
SYLVAN ROAD 7120 .0 .0 100* 35.3 29.6 119
YOUNTS PEAK 8350 .0 .0 100* 30.4 30.3 100
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Basin wide percent of average 0* 118
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0* 22.9 20.5 112
BIG GOOSE 7990 .0 .0 100* 28.5 22.1 129
BONE SPRINGS DIV 9350 .0 .0 100* 36.0 31.0 116
BURGESS JUNCTION 7880 .0 .1 0* 30.7 25.7 119
CLOUD PEAK RESERVOIR 9860 .0 .1 0* 36.4 30.1 121
DOME LAKE 8880 .0 .1 0* 31.7 28.0 113
GRAVE SPRINGS 8550 .0 .0 100* 24.9 22.2 112
HANSEN SAWMILL 8360 .0 .2 0* 24.9 21.5 116
LITTLE GOOSE 8870 .0 -M * 32.8 -M *
MIDDLE POWDER 7760 .0 .1 0* 26.0 25.4 102
POWDER RIVER PASS 9480 .0 .1 0* 34.1 26.6 128
SOLDIER PARK 8720 .0 -M * 25.3 -M *
SUCKER CREEK 8880 .0 .1 0* 36.7 29.1 126
TIE CREEK 6870 .0 .0 100* 29.8 24.2 123
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Basin wide percent of average 0* 118
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 34.2 26.2 131
COLE CANYON 5910 .0 .0 100* 32.8 22.1 148
NORTH RAPID CREEK 6130 .0 .0 100* 32.5 24.6 132
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Basin wide percent of average * 136
UPPER N. PLATTE RIVER
BLACKHALL MTN 9820 .0 -M * 65.7 -M *
CINNABAR PARK 9574 .1 .0 * 53.2 33.1 161
COLUMBINE 9160 .0 .0 100* 54.6 37.3 146
DIVIDE PEAK 8880 .0 .0 100* 46.1 32.6 141
ELK RIVER 8700 .0 .0 100* 43.7 31.7 138
JOE WRIGHT 10120 .0 .0 100* 64.4 43.7 147
NORTH FRENCH CREEK 10130 -M .0 * 82.4 41.6 198
OLD BATTLE 10000 .0 .0 100* 74.3 50.5 147
SAGE CREEK BASIN 7850 .0 .0 100* 28.6 18.9 151
SOUTH BRUSH CREEK 8440 .1 .0 * 38.2 30.2 126
TOWER 10500 .0 .0 100* 93.2 57.3 163
WEBBER SPRINGS 9250 .0 .0 100* 56.5 40.7 139
WILLOW CREEK PASS 9540 .0 .0 100* 37.1 25.8 144
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Basin wide percent of average * 152
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100* 51.3 37.7 136
CASPER MTN. 7900 .1 .0 * 27.7 29.5 94
DEADMAN HILL 10220 .0 .0 100* 39.8 30.8 129
DEER PARK 9700 .0 .1 0* 38.4 37.3 103
LAPRELE CREEK 8375 .0 .0 100* 26.0 27.0 96
RENO HILL 8400 .0 .0 100* 30.9 30.6 101
ROACH 9700 .1 .0 * 41.9 32.8 128
SAND LAKE 10050 .1 .0 * 58.9 40.9 144
SOUTH PASS 9040 .0 .1 0* 29.2 31.3 93
WINDY PEAK 7900 .0 .0 100* 22.9 23.2 99
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Basin wide percent of average 150* 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * -M 24.8 *
DIVIDE PEAK 8880 .0 .0 100* 46.1 32.6 141
OLD BATTLE 10000 .0 .0 100* 74.3 50.5 147
SANDSTONE RS 8150 .0 .0 100* 43.9 30.1 146
WHISKEY PARK 8950 .0 .0 100* 67.0 44.0 152
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Basin wide percent of average * 147
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100* 29.2 24.1 121
BLIND BULL SUM 8650 .0 .0 100* 38.6 33.7 115
EAST RIM DIVIDE 7930 .2 .0 * 24.9 20.7 120
ELKHART PARK G.S. 9400 .0 .0 100* 25.8 25.5 101
GROS VENTRE SUMMIT 8750 .0 .0 100* 27.0 24.2 112
GUNSIGHT PASS 9820 .0 -M * 33.0 -M *
KENDALL R.S. 7740 .0 .0 100* 26.2 23.5 111
LOOMIS PARK 8240 .1 .0 * 34.8 28.3 123
NEW FORK LAKE 8340 .2 .0 * 18.2 21.4 85
POCKET CREEK 9360 .0 -M * 27.8 -M *
SNIDER BASIN 8060 .0 .0 100* 29.5 24.4 121
SPRING CREEK DIVIDE 9000 .1 .0 * 49.7 38.7 128
TRIPLE PEAK 8500 .0 .0 100* 53.0 37.7 141
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Basin wide percent of average * 118
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 * 26.3 21.3 123
HEWINTA 9519 .0 .0 100* 36.1 27.0 134
HICKERSON PARK 9145 .0 .0 100* 26.5 18.8 141
HOLE-IN-ROCK 9150 .2 .0 * 28.4 18.7 152
INDIAN CREEK 9425 .2 .0 * 42.4 37.5 113
KELLEY R.S. 8180 .1 .0 * 38.4 30.8 125
STEEL CREEK PARK 10200 -M .1 * -M 30.1 *
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Basin wide percent of average * 129
UPPER BEAR RIVER
BUG LAKE 7950 -M .1 * -M 29.6 *
HAYDEN FORK 9212 -M .0 * -M 34.8 *
KELLEY R.S. 8180 .1 .0 * 38.4 30.8 125
LILY LAKE 9156 .0 .0 100* 41.1 30.0 137
MONTE CRISTO 8960 -M .0 * -M 39.3 *
SALT RIVER SUMMIT 7760 .1 .0 * 35.2 29.0 121
TRIAL LAKE 9992 .1 .1 100* 54.6 40.8 134
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Basin wide percent of average 300* 130
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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 1971-2000.
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.