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 WEDNESDAY: SEPTEMBER 17 , 1997
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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 .1 .0 * 51.3 33.2 155
COTTONWOOD CREEK 7600 .0 .0 100* 52.3 36.8 142
GRANITE CREEK 6770 .1 .0 * 45.4 37.1 122
GRASSY LAKE 7265 .0 .0 100* 75.7 54.7 138
GROS VENTRE SUMMIT 8775 .0 .0 100* 34.7 25.1 138
LEWIS LAKE DIVIDE 7860 .0 .0 100* 75.6 55.7 136
PHILLIPS BENCH 8200 .0 .0 100* 65.3 43.9 149
SALT RIVER SUMMIT 7600 -M .0 * -M 26.7 *
SNAKE RIVER STATION 6920 .0 .0 100* 53.4 38.4 139
SPRING CREEK DIVIDE 9000 .0 .0 100* 46.3 39.4 118
THUMB DIVIDE 7980 .1 .0 * 48.7 31.1 157
TOGWOTEE PASS 9580 .1 .0 * 56.4 41.8 135
TWO OCEAN PLATEAU 9360 .1 .0 * 63.1 45.8 138
WILLOW CREEK 8450 .0 .0 100* 70.7 47.1 150
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Basin wide percent of average * 139
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 .0 .1 0* 44.6 32.2 139
BLACK BEAR 7950 .0 .1 0* 88.8 60.3 147
CANYON 7940 .0 .0 100* 36.8 26.6 138
FISHER CREEK 9100 .2 .1 200* 74.0 57.6 128
MADISON PLATEAU 7750 .1 .0 * 57.2 41.5 138
NORTHEAST ENTRANCE 7350 .1 .0 * 36.3 24.2 150
PARKER PEAK 9400 .2 .1 200* 38.7 30.6 126
SYLVAN LAKE 8420 .1 .1 100* 51.1 36.0 142
THUMB DIVIDE 7980 .1 .0 * 48.7 31.1 157
TWO OCEAN PLATEAU 9360 .1 .0 * 63.1 45.8 138
WHISKEY CREEK 6800 .1 .0 * 44.9 35.6 126
WHITE MILL 8700 .3 .0 * 59.1 45.8 129
WOLVERINE 7650 .0 .0 100* 28.6 25.7 111
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Basin wide percent of average 100* 136
WIND RIVER
BURROUGHS CREEK 8750 .1 .0 * 40.8 28.7 142
CHRISTINA LAKE 9980 -M .1 * -M 30.1 *
COLD SPRINGS 9630 .2 .0 * 27.3 22.1 124
HOBBS PARK 10100 .1 .0 * 27.4 27.6 99
LITTLE WARM 9620 .0 .0 100* 36.7 26.0 141
SOUTH PASS 9040 .1 .0 * 34.6 30.2 115
ST. LAWRENCE ALT 8620 .4 .0 * 24.8 20.2 123
TOGWOTEE PASS 9580 .1 .0 * 56.4 41.8 135
TOWNSEND CREEK 8700 .2 .0 * 26.2 24.6 107
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Basin wide percent of average * 124
BIGHORN BASIN
BALD MTN. 9375 .0 .1 0* 36.9 32.1 115
BEAR TRAP MEADOW 7900 .0 .0 100* 24.7 19.9 124
BLACKWATER 9780 .0 .1 0* 48.6 35.9 135
BONE SPRINGS DIV 9350 .1 .1 100* 33.6 30.9 109
EVENING STAR 9200 .0 .1 0* 60.1 43.3 139
GRAVE SPRINGS 8550 .1 -M * 25.1 23.3 108
KIRWIN 9550 .0 .0 100* 33.5 25.1 133
LOST CREEK 8080 -M .0 * -M 25.4 *
MARQUETTE 8760 .4 .0 * 30.2 25.1 120
MIDDLE POWDER 7760 .2 .0 * 31.9 25.0 128
OWL CREEK 8975 .0 .0 100* 19.0 16.5 115
POWDER RIVER PASS 9480 .3 .0 * 35.1 24.8 142
SHELL CREEK 9580 .1 .1 100* 28.9 27.5 105
SYLVAN LAKE 8420 .1 .1 100* 51.1 36.0 142
SYLVAN ROAD 8120 .1 .0 * 40.4 31.2 129
TIMBER CREEK 7950 -M .0 * 22.5 20.3 111
YOUNTS PEAK 8350 -M .0 * 43.6 30.2 144
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Basin wide percent of average 50* 126
SHOSHONE RIVER
BLACKWATER 9780 .0 .1 0* 48.6 35.9 135
EVENING STAR 9200 .0 .1 0* 60.1 43.3 139
KIRWIN 9550 .0 .0 100* 33.5 25.1 133
MARQUETTE 8760 .4 .0 * 30.2 25.1 120
SYLVAN LAKE 8420 .1 .1 100* 51.1 36.0 142
SYLVAN ROAD 8120 .1 .0 * 40.4 31.2 129
YOUNTS PEAK 8350 -M .0 * 43.6 30.2 144
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Basin wide percent of average 33* 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .0 100* 24.7 19.9 124
BONE SPRINGS DIV 9350 .1 .1 100* 33.6 30.9 109
BURGESS JUNCTION 7880 .0 .0 100* 29.4 24.3 121
CLOUD PEAK RESERVOIR 9860 .0 .0 100* 36.6 29.2 125
DOME LAKE 8880 .0 .0 100* 32.5 27.0 120
GRAVE SPRINGS 8550 .1 -M * 25.1 23.3 108
HANSEN SAWMILL 8760 .0 .0 100* 26.5 20.0 133
LOST CREEK 8080 -M .0 * -M 25.4 *
MIDDLE POWDER 7760 .2 .0 * 31.9 25.0 128
POWDER RIVER PASS 9480 .3 .0 * 35.1 24.8 142
SUCKER CREEK 8880 .1 .0 * 32.6 28.0 116
TIE CREEK 6870 .2 -M * 34.0 23.3 146
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Basin wide percent of average 100* 124
BELLE FOURCHE
BLIND PARK 6890 .4 .0 * 31.9 27.7 115
NORTH RAPID CREEK 6130 .6 -M * 37.4 -M *
WARREN PEAK 6520 .2 .0 * 34.7 21.3 163
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Basin wide percent of average * 136
UPPER N. PLATTE RIVER
COLUMBINE 9400 .1 .0 * 47.9 36.5 131
DIVIDE PEAK 8800 .0 .0 100* 36.7 36.5 101
ELK RIVER 8700 .0 .0 100* 39.3 30.2 130
JOE WRIGHT 10120 .0 .0 100* 46.3 44.5 104
NORTH FRENCH CREEK 10100 .0 .0 100* 46.8 39.2 119
OLD BATTLE 10000 .1 .1 100* 55.5 46.9 118
SOUTH BRUSH CREEK 8400 .2 .0 * 30.1 30.2 100
TOWER 10500 .0 .0 100* 71.6 57.4 125
WEBBER SPRINGS 9200 .0 .0 100* 48.7 40.3 121
WILLOW CREEK PASS 9540 .0 .0 100* 30.0 25.4 118
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Basin wide percent of average 100* 117
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .0 100* 44.2 33.3 133
CASPER MTN. 7900 .1 .0 * 32.9 29.1 113
CHRISTINA LAKE 9980 -M .1 * -M 30.1 *
DEADMAN HILL 10220 .0 .0 100* 33.4 31.9 105
LAPRELE CREEK 8320 .0 .0 100* 26.8 24.6 109
RENO HILL 8400 .1 .0 * -M 30.1 *
ROACH 9700 .0 .0 100* 35.9 36.9 97
SAND LAKE 10080 .1 .0 * 46.2 34.6 134
SOUTH PASS 9040 .1 .0 * 34.6 30.2 115
WINDY PEAK 7840 .3 .0 * 23.7 21.4 111
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Basin wide percent of average * 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 * 20.4 25.3 81
DIVIDE PEAK 8800 .0 .0 100* 36.7 36.5 101
OLD BATTLE 10000 .1 .1 100* 55.5 46.9 118
SANDSTONE RS 8150 .0 .0 100* 33.2 32.2 103
WHISKEY PARK 8950 .0 .0 100* 50.3 43.9 115
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Basin wide percent of average 100* 106
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .0 100* 25.8 25.7 100
BLIND BULL SUM 8650 1.1 .0 * 49.9 34.3 145
EAST RIM DIVIDE 7930 .1 .0 * 29.5 23.9 123
ELKHART PARK G.S. 9400 .0 .0 100* 33.3 25.2 132
GROS VENTRE SUMMIT 8775 .0 .0 100* 34.7 25.1 138
KENDALL R.S. 7740 .0 .0 100* 36.3 24.5 148
LOOMIS PARK 8240 .0 .0 100* 44.2 29.7 149
NEW FORK LAKE 8340 .0 .0 100* 25.5 22.8 112
SNIDER BASIN 8250 .0 .0 100* 27.1 23.9 113
SPRING CREEK DIVIDE 9000 .0 .0 100* 46.3 39.4 118
TRIPLE PEAK 8500 .0 .0 100* 55.5 46.2 120
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Basin wide percent of average * 127
LOWER GREEN RIVER
HAMS FORK 7840 .6 .0 * -M 21.1 *
HEWINTA 9500 .1 .0 * 27.9 25.2 111
HICKERSON PARK 9150 .0 .0 100* 20.1 21.2 95
HOLE-IN-ROCK 9150 .0 .0 100* 21.5 21.2 101
INDIAN CREEK 9425 -M .0 * -M 38.3 *
KELLEY R.S. 8180 .7 .0 * -M 29.6 *
STEEL CREEK PARK 10100 .0 .1 0* 28.2 29.5 96
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Basin wide percent of average 0* 101
UPPER BEAR RIVER
BUG LAKE 7950 .1 .0 * 43.7 29.2 150
HAYDEN FORK 9400 .0 .0 100* 41.4 32.7 127
KELLEY R.S. 8180 .7 .0 * -M 29.6 *
LILY LAKE 9050 .4 .0 * 32.2 27.1 119
MONTE CRISTO 8960 .6 .0 * 51.5 39.4 131
SALT RIVER SUMMIT 7600 -M .0 * -M 26.7 *
TRIAL LAKE 9960 .5 .0 * 49.2 38.7 127
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Basin wide percent of average * 130
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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.