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: JULY 21 , 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 30.7 29.8 103
COTTONWOOD CREEK 7670 .0 .0 100 47.7 38.6 124
GRAND TARGHEE 9260 .0 -M * 50.6 -M *
GRANITE CREEK 6770 .0 .0 100 31.4 27.4 115
GRASSY LAKE 7265 .0 .0 100 51.1 49.1 104
GROS VENTRE SUMMIT 8750 .0 .0 100 24.5 20.7 118
GUNSIGHT PASS 9820 .0 -M * 28.7 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 49.1 49.1 100
PHILLIPS BENCH 8200 .0 .0 100 42.8 39.7 108
SALT RIVER SUMMIT 7760 .0 .0 100 27.6 26.2 105
SNAKE RIVER STATION 6920 .0 .0 100 35.0 31.6 111
SPRING CREEK DIVIDE 9000 .0 .0 100 39.9 35.5 112
THUMB DIVIDE 7980 -M .0 * 32.7 27.6 118
TOGWOTEE PASS 9580 .1 .0 44.1 36.0 123
TWO OCEAN PLATEAU 9240 .0 .0 100 45.9 40.5 113
WILLOW CREEK 8380 .0 .0 100 58.7 46.3 127
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Basin wide percent of average * 113
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100 34.6 31.1 111
BLACK BEAR 8170 .0 .0 100 51.2 54.7 94
CANYON 7870 .0 .0 100 27.1 23.8 114
FISHER CREEK 9100 .0 .0 100 51.1 52.2 98
MADISON PLATEAU 7750 .0 .0 100 37.0 38.0 97
NORTHEAST ENTRANCE 7350 .0 .0 100 23.5 21.5 109
PARKER PEAK 9400 .0 .2 0 30.3 27.1 112
SYLVAN LAKE 8420 .0 .0 100 37.6 33.3 113
THUMB DIVIDE 7980 -M .0 * 32.7 27.6 118
TWO OCEAN PLATEAU 9240 .0 .0 100 45.9 40.5 113
WHISKEY CREEK 6800 .0 .0 100 30.3 31.0 98
WHITE MILL 8700 .0 .0 100 38.1 40.0 95
WOLVERINE 7650 .0 .0 100 22.0 21.5 102
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Basin wide percent of average 0 104
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 29.1 25.6 114
COLD SPRINGS 9630 .0 .0 100 20.4 20.2 101
DEER PARK 9700 .0 .0 100 31.0 34.2 91
HOBBS PARK 10100 .0 .0 100 26.5 24.4 109
LITTLE WARM 9370 .0 .0 100 26.4 23.3 113
SOUTH PASS 9040 .0 .0 100 26.9 28.8 93
ST. LAWRENCE ALT 8620 .0 .0 100 19.1 18.3 104
TOGWOTEE PASS 9580 .1 .0 44.1 36.0 123
TOWNSEND CREEK 8700 .0 .0 100 22.7 21.8 104
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Basin wide percent of average * 106
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100 26.6 29.6 90
BEAR TRAP MEADOW 8200 .0 .0 100 17.8 17.9 99
BLACKWATER 9780 .0 .1 0 37.3 33.7 111
BONE SPRINGS DIV 9350 .0 .0 100 25.4 26.9 94
EVENING STAR 9200 .0 .2 0 45.0 39.4 114
GRAVE SPRINGS 8550 .0 .0 100 16.1 19.8 81
KIRWIN 9550 .0 .0 100 27.0 21.9 123
MARQUETTE 8760 .0 .0 100 18.3 22.4 82
MIDDLE POWDER 7760 .0 .0 100 18.7 22.8 82
OWL CREEK 8975 .0 .0 100 18.8 14.4 131
POWDER RIVER PASS 9480 .0 .0 100 26.0 23.5 111
SHELL CREEK 9580 .0 .0 100 26.6 25.1 106
SYLVAN LAKE 8420 .0 .0 100 37.6 33.3 113
SYLVAN ROAD 7120 .0 .0 100 31.0 26.7 116
TIMBER CREEK 7950 .0 .0 100 18.1 17.7 102
YOUNTS PEAK 8350 .0 .0 100 26.7 26.1 102
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Basin wide percent of average 0 104
SHOSHONE RIVER
BLACKWATER 9780 .0 .1 0 37.3 33.7 111
EVENING STAR 9200 .0 .2 0 45.0 39.4 114
KIRWIN 9550 .0 .0 100 27.0 21.9 123
MARQUETTE 8760 .0 .0 100 18.3 22.4 82
SYLVAN LAKE 8420 .0 .0 100 37.6 33.3 113
SYLVAN ROAD 7120 .0 .0 100 31.0 26.7 116
YOUNTS PEAK 8350 .0 .0 100 26.7 26.1 102
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Basin wide percent of average 0 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 17.8 17.9 99
BIG GOOSE 7990 .0 .0 100 20.4 19.3 106
BONE SPRINGS DIV 9350 .0 .0 100 25.4 26.9 94
BURGESS JUNCTION 7880 .0 .0 100 21.8 22.6 96
CLOUD PEAK RESERVOIR 9860 .0 .0 100 28.4 26.3 108
DOME LAKE 8880 .0 .0 100 24.5 24.4 100
GRAVE SPRINGS 8550 .0 .0 100 16.1 19.8 81
HANSEN SAWMILL 8360 .0 .0 100 18.2 18.1 101
MIDDLE POWDER 7760 .0 .0 100 18.7 22.8 82
POWDER RIVER PASS 9480 .0 .0 100 26.0 23.5 111
SUCKER CREEK 8880 .0 .0 100 28.1 25.8 109
TIE CREEK 6870 .0 .0 100 24.8 21.0 118
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Basin wide percent of average * 101
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 24.9 22.8 109
COLE CANYON 5910 .0 .0 100 22.6 18.2 124
NORTH RAPID CREEK 6130 .0 .0 100 19.9 20.6 97
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Basin wide percent of average * 109
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 37.3 34.6 108
DIVIDE PEAK 8880 -M .0 * 39.1 29.8 131
ELK RIVER 8700 .2 .0 31.3 28.5 110
JOE WRIGHT 10120 -M .0 * 41.8 38.8 108
NORTH FRENCH CREEK 10130 -M .0 * -M 38.1 *
OLD BATTLE 10000 -M .0 * 53.2 47.1 113
SAGE CREEK BASIN 7850 .0 .0 100 23.3 17.3 135
SOUTH BRUSH CREEK 8440 .0 .0 100 26.3 26.7 99
TOWER 10500 .0 .0 100 59.0 53.4 110
WEBBER SPRINGS 9250 .0 .0 100 41.1 37.3 110
WILLOW CREEK PASS 9540 .0 .0 100 22.3 22.1 101
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Basin wide percent of average * 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 33.4 34.4 97
CASPER MTN. 7900 -M .0 * 25.0 27.0 93
DEADMAN HILL 10220 -M .0 * 27.3 27.3 100
DEER PARK 9700 .0 .0 100 31.0 34.2 91
LAPRELE CREEK 8375 -M .0 * -M 23.1 *
RENO HILL 8400 .0 .0 100 27.1 27.4 99
ROACH 9700 .0 .0 100 30.7 29.3 105
SAND LAKE 10050 .0 .0 100 43.8 37.7 116
SOUTH PASS 9040 .0 .0 100 26.9 28.8 93
WINDY PEAK 7900 -M .0 * -M 20.2 *
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Basin wide percent of average * 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 28.1 22.8 123
DIVIDE PEAK 8880 -M .0 * 39.1 29.8 131
OLD BATTLE 10000 -M .0 * 53.2 47.1 113
SANDSTONE RS 8150 -M .0 * 30.6 27.1 113
WHISKEY PARK 8950 -M .0 * -M 40.9 *
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Basin wide percent of average * 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 25.8 21.3 121
BLIND BULL SUM 8650 .0 .0 100 32.2 30.6 105
EAST RIM DIVIDE 7930 .0 .0 100 21.0 18.1 116
ELKHART PARK G.S. 9400 .0 .0 100 27.1 21.8 124
GROS VENTRE SUMMIT 8750 .0 .0 100 24.5 20.7 118
GUNSIGHT PASS 9820 .0 -M * 28.7 -M *
KENDALL R.S. 7740 .0 .0 100 23.2 20.8 112
LOOMIS PARK 8240 -M .0 * 29.8 24.7 121
NEW FORK LAKE 8340 .0 .0 100 20.5 18.4 111
SNIDER BASIN 8060 .0 .0 100 23.1 22.2 104
SPRING CREEK DIVIDE 9000 .0 .0 100 39.9 35.5 112
TRIPLE PEAK 8500 .0 .0 100 40.8 34.7 118
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Basin wide percent of average * 115
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 22.2 19.1 116
HEWINTA 9519 .0 .0 100 21.6 23.1 94
HICKERSON PARK 9145 .0 .0 100 21.0 15.1 139
HOLE-IN-ROCK 9150 .0 .0 100 18.1 14.9 121
INDIAN CREEK 9425 .0 .0 100 33.3 34.7 96
KELLEY R.S. 8180 .0 .0 100 29.5 28.4 104
STEEL CREEK PARK 10200 .0 .0 100 25.9 26.1 99
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Basin wide percent of average * 106
UPPER BEAR RIVER
BUG LAKE 7950 -M .0 * 26.9 27.0 100
HAYDEN FORK 9212 .0 .0 100 32.6 31.1 105
KELLEY R.S. 8180 .0 .0 100 29.5 28.4 104
LILY LAKE 9156 .0 .0 100 27.0 26.5 102
MONTE CRISTO 8960 .0 .0 100 38.7 36.3 107
SALT RIVER SUMMIT 7760 .0 .0 100 27.6 26.2 105
TRIAL LAKE 9992 .0 .0 100 37.4 36.3 103
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Basin wide percent of average * 104
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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.