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 SUNDAY: AUGUST 22 , 1999
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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* -M 32.0 *
COTTONWOOD CREEK 7600 .2 .0 * -M 35.5 *
GRANITE CREEK 6770 -M .0 * -M 35.5 *
GRASSY LAKE 7265 .0 .0 100* -M 52.8 *
GROS VENTRE SUMMIT 8775 .0 .0 100* -M 24.0 *
LEWIS LAKE DIVIDE 7860 .0 .0 100* -M 53.5 *
PHILLIPS BENCH 8200 .2 .0 * -M 42.3 *
SALT RIVER SUMMIT 7600 -M .0 * -M 25.5 *
SNAKE RIVER STATION 6920 .0 .0 100* 38.0 37.0 103
SPRING CREEK DIVIDE 9000 .3 .0 * -M 38.0 *
THUMB DIVIDE 7980 .0 .0 100* -M 30.0 *
TOGWOTEE PASS 9580 .8 .0 * -M 40.3 *
TWO OCEAN PLATEAU 9360 -M .0 * -M 44.0 *
WILLOW CREEK 8450 .0 .0 100* -M 45.5 *
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Basin wide percent of average * 103*
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 .0 .0 100* 35.4 30.9 115
BLACK BEAR 7950 .0 .0 100* 69.5 58.2 120
CANYON 7940 .0 .0 100* 28.7 24.9 116
FISHER CREEK 9100 .0 .0 100* 53.5 55.5 97
MADISON PLATEAU 7750 .0 .0 100* 45.7 39.5 116
NORTHEAST ENTRANCE 7350 .0 .0 100* 24.0 22.5 108
PARKER PEAK 9400 .2 .0 * 33.3 28.5 117
SYLVAN LAKE 8420 .0 .0 100* 42.2 33.9 125
THUMB DIVIDE 7980 .0 .0 100* -M 30.0 *
TWO OCEAN PLATEAU 9360 -M .0 * -M 44.0 *
WHISKEY CREEK 6800 .0 .0 100* 37.3 33.9 111
WHITE MILL 8700 .0 .0 100* 37.2 43.9 85
WOLVERINE 7650 .0 .0 100* 21.0 24.2 88
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Basin wide percent of average * 109
WIND RIVER
BURROUGHS CREEK 8750 .4 .0 * 29.2 27.0 108
COLD SPRINGS 9630 .0 .0 100* 28.4 20.7 138
DEER PARK 9700 .3 -M * 40.5 -M *
HOBBS PARK 10100 .0 .0 100* 33.4 26.0 129
LITTLE WARM 9620 .2 .0 * 30.2 24.4 124
SOUTH PASS 9040 -M .0 * -M 29.0 *
ST. LAWRENCE ALT 8620 .3 .0 * 24.8 19.2 130
TOGWOTEE PASS 9580 .8 .0 * -M 40.3 *
TOWNSEND CREEK 8700 .3 .0 * 30.5 23.3 132
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Basin wide percent of average * 126
BIGHORN BASIN
BALD MTN. 9375 .0 .0 100* 31.0 30.5 102
BEAR TRAP MEADOW 7900 .0 .0 100* -M 18.7 *
BLACKWATER 9780 -M .0 * 37.8 33.2 114
BONE SPRINGS DIV 9350 -M .0 * 31.2 28.9 108
EVENING STAR 9200 .0 .0 100* 49.2 40.2 123
GRAVE SPRINGS 8550 .3 .0 * 22.8 21.8 105
KIRWIN 9550 .2 .0 * 27.5 23.0 120
MARQUETTE 8760 .0 .0 100* 28.0 23.4 121
MIDDLE POWDER 7760 .2 .0 * 29.5 23.5 126
OWL CREEK 8975 .0 .0 100* 21.2 15.4 138
POWDER RIVER PASS 9480 .0 .0 100* 28.2 23.4 121
SHELL CREEK 9580 .0 .0 100* 27.9 25.9 108
SYLVAN LAKE 8420 .0 .0 100* 42.2 33.9 125
SYLVAN ROAD 8120 .0 .0 100* 28.4 29.0 98
TIMBER CREEK 7950 .2 .0 * 21.8 18.8 117
YOUNTS PEAK 8350 .0 .0 100* 30.0 28.4 107
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Basin wide percent of average * 115
SHOSHONE RIVER
BLACKWATER 9780 -M .0 * 37.8 33.2 114
EVENING STAR 9200 .0 .0 100* 49.2 40.2 123
KIRWIN 9550 .2 .0 * 27.5 23.0 120
MARQUETTE 8760 .0 .0 100* 28.0 23.4 121
SYLVAN LAKE 8420 .0 .0 100* 42.2 33.9 125
SYLVAN ROAD 8120 .0 .0 100* 28.4 29.0 98
YOUNTS PEAK 8350 .0 .0 100* 30.0 28.4 107
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Basin wide percent of average * 116
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .0 100* -M 18.7 *
BIG GOOSE 7990 .0 -M * 23.0 -M *
BONE SPRINGS DIV 9350 -M .0 * 31.2 28.9 108
BURGESS JUNCTION 7880 .2 .0 * 23.0 22.9 101
CLOUD PEAK RESERVOIR 9860 .0 .0 100* 30.8 27.5 112
DOME LAKE 8880 .0 .0 100* 22.0 25.4 87
GRAVE SPRINGS 8550 .3 .0 * 22.8 21.8 105
HANSEN SAWMILL 8760 .5 .0 * 21.2 18.5 115
MIDDLE POWDER 7760 .2 .0 * 29.5 23.5 126
POWDER RIVER PASS 9480 .0 .0 100* 28.2 23.4 121
SUCKER CREEK 8880 -M .0 * 28.7 26.5 109
TIE CREEK 6870 .2 -M * 25.5 22.0 117
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Basin wide percent of average * 110
BELLE FOURCHE
BLIND PARK 6890 .3 .0 * 30.8 26.0 119
NORTH RAPID CREEK 6130 .2 -M * 28.8 -M *
WARREN PEAK 6520 .2 .0 * 29.8 20.0 150
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Basin wide percent of average * 132
UPPER N. PLATTE RIVER
COLUMBINE 9400 .3 .0 * 35.3 35.4 100
DIVIDE PEAK 8800 .0 .0 100* 39.0 34.8 113
ELK RIVER 8700 .0 .0 100* 36.0 28.9 125
JOE WRIGHT 10120 .0 .0 100* 42.5 42.3 101
NORTH FRENCH CREEK 10100 .0 .0 100* 42.3 37.5 113
OLD BATTLE 10000 .0 .0 100* 56.0 45.0 125
SOUTH BRUSH CREEK 8400 5.5 .0 * -M 28.7 *
TOWER 10500 .2 .0 * 57.8 55.4 105
WEBBER SPRINGS 9200 .2 .0 * 41.4 38.5 108
WILLOW CREEK PASS 9540 .0 .0 100* 24.5 23.8 104
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Basin wide percent of average * 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 -M .0 * -M 32.0 *
CASPER MTN. 7900 .0 .0 100* 28.4 28.0 102
DEADMAN HILL 10220 .0 .0 100* 30.5 30.4 101
DEER PARK 9700 .3 -M * 40.5 -M *
LAPRELE CREEK 8320 .2 .0 * 27.7 23.4 119
RENO HILL 8400 .0 .0 100* 31.8 29.3 109
ROACH 9700 .0 .0 100* 33.0 35.4 94
SAND LAKE 10080 .3 .0 * 47.0 33.0 143
SOUTH PASS 9040 -M .0 * -M 29.0 *
WINDY PEAK 7840 .2 .0 * 25.3 20.7 123
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Basin wide percent of average * 112
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 27.4 23.9 115
DIVIDE PEAK 8800 .0 .0 100* 39.0 34.8 113
OLD BATTLE 10000 .0 .0 100* 56.0 45.0 125
SANDSTONE RS 8150 -M .0 * 31.5 30.3 105
WHISKEY PARK 8950 .0 .0 100* 44.5 42.5 105
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Basin wide percent of average * 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .0 100* -M 24.5 *
BLIND BULL SUM 8650 .2 .0 * -M 33.2 *
EAST RIM DIVIDE 7930 .4 .0 * -M 22.9 *
ELKHART PARK G.S. 9400 .4 .0 * -M 24.0 *
GROS VENTRE SUMMIT 8775 .0 .0 100* -M 24.0 *
KENDALL R.S. 7740 .0 .0 100* -M 23.4 *
LOOMIS PARK 8240 .8 .0 * -M 28.4 *
NEW FORK LAKE 8340 .0 .0 100* -M 21.9 *
SNIDER BASIN 8250 .0 .0 100* -M 22.9 *
SPRING CREEK DIVIDE 9000 .3 .0 * -M 38.0 *
TRIPLE PEAK 8500 .0 .0 100* -M 44.4 *
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Basin wide percent of average * *
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* -M 20.2 *
HEWINTA 9500 .2 .0 * 25.9 24.0 108
HICKERSON PARK 9150 .4 .0 * 20.5 20.2 102
HOLE-IN-ROCK 9150 .0 .0 100* 21.0 20.2 104
INDIAN CREEK 9425 -M .0 * -M 36.9 *
KELLEY R.S. 8180 .0 .0 100* -M 28.3 *
STEEL CREEK PARK 10100 .0 .0 100* -M 27.8 *
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Basin wide percent of average * 105*
UPPER BEAR RIVER
BUG LAKE 7950 .2 .0 * 33.5 27.9 121
HAYDEN FORK 9400 .3 .0 * 35.9 31.2 116
KELLEY R.S. 8180 .0 .0 100* -M 28.3 *
LILY LAKE 9050 .0 .0 100* 31.2 25.8 122
MONTE CRISTO 8960 .0 .0 100* 43.3 37.9 115
SALT RIVER SUMMIT 7600 -M .0 * -M 25.5 *
TRIAL LAKE 9960 .0 .0 100* 37.8 37.0 103
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Basin wide percent of average * 114
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-M = Missing data
* = Data may not provide a valid measure of conditions.
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.
