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 FRIDAY: AUGUST 21 , 2009
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 -M .0 * -M 31.1 *
COTTONWOOD CREEK 7670 .0 .0 100 48.4 40.1 121
GRAND TARGHEE 9260 .0 -M * 52.0 -M *
GRANITE CREEK 6770 .0 .0 100 32.0 28.7 111
GRASSY LAKE 7265 .1 .0 52.0 50.6 103
GROS VENTRE SUMMIT 8750 .0 .0 100 25.5 22.4 114
GUNSIGHT PASS 9820 -M -M * -M -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 50.3 50.6 99
PHILLIPS BENCH 8200 .0 .0 100 44.6 41.2 108
SALT RIVER SUMMIT 7760 .2 .0 27.9 27.4 102
SNAKE RIVER STATION 6920 .0 .0 100 35.9 33.0 109
SPRING CREEK DIVIDE 9000 .0 .0 100 40.5 36.9 110
THUMB DIVIDE 7980 .1 .0 34.4 28.6 120
TOGWOTEE PASS 9580 .1 .0 45.8 37.9 121
TWO OCEAN PLATEAU 9240 .0 .0 100 47.6 42.2 113
WILLOW CREEK 8380 .0 .0 100 59.2 48.3 123
----- -----
Basin wide percent of average * 112
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .0 .0 100 36.9 32.8 112
BLACK BEAR 8170 .0 .0 100 52.2 56.5 92
CANYON 7870 .0 .0 100 28.2 25.3 111
FISHER CREEK 9100 .0 .0 100 53.1 54.6 97
MADISON PLATEAU 7750 .0 .0 100 37.9 39.4 96
NORTHEAST ENTRANCE 7350 .0 .0 100 25.1 23.4 107
PARKER PEAK 9400 .0 .0 100 32.2 28.7 112
SYLVAN LAKE 8420 .0 .0 100 39.2 34.9 112
THUMB DIVIDE 7980 .1 .0 34.4 28.6 120
TWO OCEAN PLATEAU 9240 .0 .0 100 47.6 42.2 113
WHISKEY CREEK 6800 .0 .0 100 30.8 32.3 95
WHITE MILL 8700 .0 .0 100 40.3 42.2 95
WOLVERINE 7650 .0 .0 100 24.2 23.3 104
----- -----
Basin wide percent of average * 104
WIND RIVER
BURROUGHS CREEK 8750 .0 .0 100 30.4 27.2 112
COLD SPRINGS 9630 .0 .0 100 21.9 21.6 101
DEER PARK 9700 .0 .0 100 32.4 35.6 91
HOBBS PARK 10100 .0 .0 100 27.8 26.0 107
LITTLE WARM 9370 .0 .0 100 27.6 24.8 111
SOUTH PASS 9040 .0 .0 100 28.0 30.0 93
ST. LAWRENCE ALT 8620 .0 .0 100 20.2 19.6 103
TOGWOTEE PASS 9580 .1 .0 45.8 37.9 121
TOWNSEND CREEK 8700 .0 .0 100 24.3 23.1 105
----- -----
Basin wide percent of average * 105
BIGHORN BASIN
BALD MTN. 9380 .0 .0 100 29.3 31.1 94
BEAR TRAP MEADOW 8200 .0 .0 100 21.5 19.0 113
BLACKWATER 9780 .0 .0 100 38.8 35.6 109
BONE SPRINGS DIV 9350 .0 .0 100 28.0 28.9 97
EVENING STAR 9200 .0 .0 100 48.3 41.4 117
GRAVE SPRINGS 8550 .0 .0 100 18.1 21.1 86
KIRWIN 9550 .0 .0 100 28.5 24.2 118
MARQUETTE 8760 .0 .0 100 20.9 24.3 86
MIDDLE POWDER 7760 .0 .0 100 21.9 24.0 91
OWL CREEK 8975 .0 .0 100 20.9 15.9 131
POWDER RIVER PASS 9480 .0 .0 100 28.8 25.0 115
SHELL CREEK 9580 .0 .0 100 29.1 26.6 109
SYLVAN LAKE 8420 .0 .0 100 39.2 34.9 112
SYLVAN ROAD 7120 .0 .0 100 32.4 28.1 115
TIMBER CREEK 7950 .0 .0 100 19.7 19.4 102
YOUNTS PEAK 8350 .0 .0 100 28.3 28.1 101
----- -----
Basin wide percent of average * 106
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100 38.8 35.6 109
EVENING STAR 9200 .0 .0 100 48.3 41.4 117
KIRWIN 9550 .0 .0 100 28.5 24.2 118
MARQUETTE 8760 .0 .0 100 20.9 24.3 86
SYLVAN LAKE 8420 .0 .0 100 39.2 34.9 112
SYLVAN ROAD 7120 .0 .0 100 32.4 28.1 115
YOUNTS PEAK 8350 .0 .0 100 28.3 28.1 101
----- -----
Basin wide percent of average * 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .0 100 21.5 19.0 113
BIG GOOSE 7990 .0 .0 100 23.1 20.1 115
BONE SPRINGS DIV 9350 .0 .0 100 28.0 28.9 97
BURGESS JUNCTION 7880 .0 .0 100 24.1 24.2 100
CLOUD PEAK RESERVOIR 9860 .0 .0 100 30.6 28.2 109
DOME LAKE 8880 .0 .0 100 27.2 26.1 104
GRAVE SPRINGS 8550 .0 .0 100 18.1 21.1 86
HANSEN SAWMILL 8360 .0 .0 100 20.1 19.9 101
MIDDLE POWDER 7760 .0 .0 100 21.9 24.0 91
POWDER RIVER PASS 9480 .0 .0 100 28.8 25.0 115
SUCKER CREEK 8880 .0 .0 100 31.2 27.4 114
TIE CREEK 6870 .0 .0 100 28.1 22.5 125
----- -----
Basin wide percent of average * 106
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 27.3 25.0 109
COLE CANYON 5910 .0 .0 100 27.0 20.6 131
NORTH RAPID CREEK 6130 .0 .0 100 22.3 23.5 95
----- -----
Basin wide percent of average * 111
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 38.2 36.0 106
DIVIDE PEAK 8880 .1 .0 41.4 31.1 133
ELK RIVER 8700 .0 .0 100 -M 30.1 *
JOE WRIGHT 10120 .1 .0 43.4 41.3 105
NORTH FRENCH CREEK 10130 .0 .0 100 -M 39.9 *
OLD BATTLE 10000 .0 .0 100 -M 48.6 *
SAGE CREEK BASIN 7850 .0 .0 100 25.8 18.1 143
SOUTH BRUSH CREEK 8440 .0 .0 100 27.3 28.4 96
TOWER 10500 .0 .0 100 -M 55.2 *
WEBBER SPRINGS 9250 .0 .0 100 -M 38.8 *
WILLOW CREEK PASS 9540 .0 .0 100 22.8 24.1 95
----- -----
Basin wide percent of average * 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100 34.1 36.1 94
CASPER MTN. 7900 .0 .0 100 26.7 28.3 94
DEADMAN HILL 10220 .0 .0 100 29.9 29.2 102
DEER PARK 9700 .0 .0 100 32.4 35.6 91
LAPRELE CREEK 8375 -M .0 * 23.2 25.3 92
RENO HILL 8400 .0 .0 100 28.4 29.1 98
ROACH 9700 .0 .0 100 31.9 31.2 102
SAND LAKE 10050 .0 .0 100 -M 39.4 *
SOUTH PASS 9040 .0 .0 100 28.0 30.0 93
WINDY PEAK 7900 .0 .0 100 22.7 22.0 103
----- -----
Basin wide percent of average * 96
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 -M 23.7 *
DIVIDE PEAK 8880 .1 .0 41.4 31.1 133
OLD BATTLE 10000 .0 .0 100 -M 48.6 *
SANDSTONE RS 8150 .0 .0 100 -M 28.5 *
WHISKEY PARK 8950 .0 .0 100 48.1 42.4 113
----- -----
Basin wide percent of average * 122*
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 .0 100 26.9 22.6 119
BLIND BULL SUM 8650 .0 .0 100 32.5 32.1 101
EAST RIM DIVIDE 7930 -M .0 * 21.6 19.3 112
ELKHART PARK G.S. 9400 .1 .0 27.7 23.4 118
GROS VENTRE SUMMIT 8750 .0 .0 100 25.5 22.4 114
GUNSIGHT PASS 9820 -M -M * -M -M *
KENDALL R.S. 7740 .0 .0 100 24.1 22.0 110
LOOMIS PARK 8240 .1 .0 30.5 26.4 116
NEW FORK LAKE 8340 .0 .0 100 21.4 19.8 108
SNIDER BASIN 8060 .0 .0 100 23.4 23.1 101
SPRING CREEK DIVIDE 9000 .0 .0 100 40.5 36.9 110
TRIPLE PEAK 8500 .1 .0 41.1 36.1 114
----- -----
Basin wide percent of average * 111
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 23.0 20.2 114
HEWINTA 9519 .0 .0 100 -M 25.0 *
HICKERSON PARK 9145 .0 .0 100 -M 17.0 *
HOLE-IN-ROCK 9150 .0 .0 100 -M 16.9 *
INDIAN CREEK 9425 .1 .0 33.8 36.0 94
KELLEY R.S. 8180 .2 .0 30.1 29.4 102
STEEL CREEK PARK 10200 .0 .0 100 -M 28.1 *
----- -----
Basin wide percent of average * 102*
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 27.3 28.1 97
HAYDEN FORK 9212 .0 .0 100 33.6 32.8 102
KELLEY R.S. 8180 .2 .0 30.1 29.4 102
LILY LAKE 9156 .0 .0 100 27.9 28.1 99
MONTE CRISTO 8960 .0 .0 100 39.0 37.4 104
SALT RIVER SUMMIT 7760 .2 .0 27.9 27.4 102
TRIAL LAKE 9992 .0 .0 100 38.4 38.5 100
----- -----
Basin wide percent of average * 101
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.