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 THURSDAY: AUGUST 20 , 1998
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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* 32.1 31.8 101
COTTONWOOD CREEK 7600 .0 .0 100* 36.6 35.3 104
GRANITE CREEK 6770 .2 .0 * 31.1 35.2 88
GRASSY LAKE 7265 .1 .0 * 52.2 52.5 99
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.4 23.8 111
LEWIS LAKE DIVIDE 7860 .0 .0 100* 45.7 53.3 86
PHILLIPS BENCH 8200 .0 .0 100* 38.5 42.0 92
SALT RIVER SUMMIT 7600 .1 .0 * 31.5 25.3 125
SNAKE RIVER STATION 6920 .0 .0 100* 36.6 36.8 99
SPRING CREEK DIVIDE 9000 .1 .0 * 34.2 37.9 90
THUMB DIVIDE 7980 .0 .0 100* 30.9 29.7 104
TOGWOTEE PASS 9580 .1 .0 * 37.8 40.0 94
TWO OCEAN PLATEAU 9360 .1 .0 * 43.3 43.8 99
WILLOW CREEK 8450 .0 .0 100* 48.8 45.2 108
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Basin wide percent of average * 99
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 .0 .0 100* 28.6 30.6 93
BLACK BEAR 7950 .0 .0 100* 52.1 57.9 90
CANYON 7940 .0 .0 100* 24.9 24.6 101
FISHER CREEK 9100 .1 .0 * 45.6 55.2 83
MADISON PLATEAU 7750 .1 .0 * 38.2 39.3 97
NORTHEAST ENTRANCE 7350 -M .0 * -M 22.3 *
PARKER PEAK 9400 .3 .0 * 29.7 28.3 105
SYLVAN LAKE 8420 .1 .0 * 35.2 33.6 105
THUMB DIVIDE 7980 .0 .0 100* 30.9 29.7 104
TWO OCEAN PLATEAU 9360 .1 .0 * 43.3 43.8 99
WHISKEY CREEK 6800 .0 .0 100* 34.2 33.7 101
WHITE MILL 8700 -M .0 * -M 43.6 *
WOLVERINE 7650 .1 .0 * 20.1 23.9 84
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Basin wide percent of average * 96
WIND RIVER
BURROUGHS CREEK 8750 .2 .0 * 31.1 26.8 116
COLD SPRINGS 9630 .3 .0 * 24.7 20.5 120
DEER PARK 9700 -M -M * 37.1 -M *
HOBBS PARK 10100 .1 .0 * -M 25.9 *
LITTLE WARM 9620 .1 .0 * 25.4 24.2 105
SOUTH PASS 9040 .2 .0 * 31.7 28.7 110
ST. LAWRENCE ALT 8620 .4 .0 * 22.4 19.0 118
TOGWOTEE PASS 9580 .1 .0 * 37.8 40.0 94
TOWNSEND CREEK 8700 .1 .0 * 27.7 23.0 120
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Basin wide percent of average * 110
BIGHORN BASIN
BALD MTN. 9375 .0 .0 100* 31.9 30.2 106
BEAR TRAP MEADOW 7900 .0 .0 100* 20.6 18.4 112
BLACKWATER 9780 .0 .0 100* 33.8 32.8 103
BONE SPRINGS DIV 9350 .0 .0 100* 29.5 28.6 103
EVENING STAR 9200 .1 .0 * 40.6 39.8 102
GRAVE SPRINGS 8550 .1 -M * 24.0 21.6 111
KIRWIN 9550 .0 .0 100* 27.9 22.9 122
MARQUETTE 8760 .1 .0 * 29.4 23.1 127
MIDDLE POWDER 7760 .1 .0 * 26.3 23.4 112
OWL CREEK 8975 .1 .0 * 18.6 15.2 122
POWDER RIVER PASS 9480 .0 .0 100* 24.9 23.2 107
SHELL CREEK 9580 .0 .0 100* -M 25.7 *
SYLVAN LAKE 8420 .1 .0 * 35.2 33.6 105
SYLVAN ROAD 8120 .1 .0 * 24.9 28.8 86
TIMBER CREEK 7950 .1 .0 * 20.9 18.6 112
YOUNTS PEAK 8350 .1 .0 * 27.7 28.1 99
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Basin wide percent of average * 107
SHOSHONE RIVER
BLACKWATER 9780 .0 .0 100* 33.8 32.8 103
EVENING STAR 9200 .1 .0 * 40.6 39.8 102
KIRWIN 9550 .0 .0 100* 27.9 22.9 122
MARQUETTE 8760 .1 .0 * 29.4 23.1 127
SYLVAN LAKE 8420 .1 .0 * 35.2 33.6 105
SYLVAN ROAD 8120 .1 .0 * 24.9 28.8 86
YOUNTS PEAK 8350 .1 .0 * 27.7 28.1 99
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Basin wide percent of average * 105
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .0 100* 20.6 18.4 112
BONE SPRINGS DIV 9350 .0 .0 100* 29.5 28.6 103
BURGESS JUNCTION 7880 .0 .0 100* 23.6 22.7 104
CLOUD PEAK RESERVOIR 9860 .0 .0 100* -M 27.3 *
DOME LAKE 8880 .0 .0 100* 19.2 25.2 76
GRAVE SPRINGS 8550 .1 -M * 24.0 21.6 111
HANSEN SAWMILL 8760 .0 .0 100* 23.4 18.3 128
MIDDLE POWDER 7760 .1 .0 * 26.3 23.4 112
POWDER RIVER PASS 9480 .0 .0 100* 24.9 23.2 107
SUCKER CREEK 8880 .0 .0 100* 27.2 26.3 103
TIE CREEK 6870 .0 -M * -M 21.8 *
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Basin wide percent of average * 105
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 27.8 25.8 108
NORTH RAPID CREEK 6130 .0 -M * 33.9 -M *
WARREN PEAK 6520 .0 .0 100* 24.5 19.7 124
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Basin wide percent of average * 115
UPPER N. PLATTE RIVER
COLUMBINE 9400 .0 .0 100* -M 35.1 *
DIVIDE PEAK 8800 .0 .0 100* 31.4 34.6 91
ELK RIVER 8700 .0 .0 100* 31.0 28.6 108
JOE WRIGHT 10120 .0 .0 100* 40.5 42.0 96
NORTH FRENCH CREEK 10100 -M .0 * 45.1 37.3 121
OLD BATTLE 10000 .0 .0 100* 50.2 44.7 112
SOUTH BRUSH CREEK 8400 .0 .0 100* 23.4 28.4 82
TOWER 10500 .0 .0 100* 58.0 55.1 105
WEBBER SPRINGS 9200 .0 .0 100* 38.2 38.3 100
WILLOW CREEK PASS 9540 .0 .0 100* 18.9 23.5 80
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Basin wide percent of average * 101
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .2 .0 * 33.5 31.7 106
CASPER MTN. 7900 .0 .0 100* 22.0 27.8 79
DEADMAN HILL 10220 .0 .0 100* 26.3 30.1 87
DEER PARK 9700 -M -M * 37.1 -M *
LAPRELE CREEK 8320 .0 .0 100* 20.2 23.2 87
RENO HILL 8400 .0 .0 100* 20.4 29.1 70
ROACH 9700 .0 .0 100* 28.4 35.2 81
SAND LAKE 10080 -M .0 * -M 32.8 *
SOUTH PASS 9040 .2 .0 * 31.7 28.7 110
WINDY PEAK 7840 .0 .0 100* 18.3 20.5 89
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Basin wide percent of average * 89
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 24.9 23.6 106
DIVIDE PEAK 8800 .0 .0 100* 31.4 34.6 91
OLD BATTLE 10000 .0 .0 100* 50.2 44.7 112
SANDSTONE RS 8150 .2 .0 * 29.6 30.0 99
WHISKEY PARK 8950 .0 .0 100* 44.3 42.4 104
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Basin wide percent of average * 103
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .0 100* 26.0 24.3 107
BLIND BULL SUM 8650 .0 .0 100* 30.1 33.0 91
EAST RIM DIVIDE 7930 .0 .0 100* 21.5 22.7 95
ELKHART PARK G.S. 9400 .1 .0 * 26.0 23.9 109
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.4 23.8 111
KENDALL R.S. 7740 .0 .0 100* 24.0 23.2 103
LOOMIS PARK 8240 .0 .0 100* 29.2 28.1 104
NEW FORK LAKE 8340 .0 .0 100* 22.8 21.6 106
SNIDER BASIN 8250 .0 .0 100* 20.7 22.7 91
SPRING CREEK DIVIDE 9000 .1 .0 * 34.2 37.9 90
TRIPLE PEAK 8500 .0 .0 100* 34.2 44.2 77
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Basin wide percent of average * 97
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 21.7 20.0 108
HEWINTA 9500 .0 .0 100* 18.4 23.7 78
HICKERSON PARK 9150 .0 .0 100* 26.4 19.9 133
HOLE-IN-ROCK 9150 .0 .0 100* 24.8 19.9 125
INDIAN CREEK 9425 .1 .0 * 32.7 36.6 89
KELLEY R.S. 8180 .0 .0 100* 29.4 28.0 105
STEEL CREEK PARK 10100 .0 .0 100* 32.1 27.5 117
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Basin wide percent of average * 106
UPPER BEAR RIVER
BUG LAKE 7950 .0 .0 100* 33.3 27.7 120
HAYDEN FORK 9400 -M .0 * 32.7 31.0 105
KELLEY R.S. 8180 .0 .0 100* 29.4 28.0 105
LILY LAKE 9050 -M .0 * 30.7 25.5 120
MONTE CRISTO 8960 -M .0 * 43.0 37.6 114
SALT RIVER SUMMIT 7600 .1 .0 * 31.5 25.3 125
TRIAL LAKE 9960 .2 .0 * 38.5 36.7 105
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Basin wide percent of average * 113
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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.