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 MONDAY: SEPTEMBER 20 , 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* 37.4 33.5 112
COTTONWOOD CREEK 7600 .2 .0 * 45.3 37.0 123
GRANITE CREEK 6770 .2 .0 * 35.2 37.5 94
GRASSY LAKE 7265 .0 .0 100* 60.5 55.2 110
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.5 25.4 105
LEWIS LAKE DIVIDE 7860 .0 .0 100* 54.9 56.0 98
PHILLIPS BENCH 8200 .3 .0 * 45.5 44.2 104
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.0 117
SNAKE RIVER STATION 6920 .0 .0 100* 39.9 38.8 103
SPRING CREEK DIVIDE 9000 .5 .0 * 44.0 39.7 111
THUMB DIVIDE 7980 .0 .0 100* 35.7 31.4 114
TOGWOTEE PASS 9580 .2 .0 * 41.5 42.2 99
TWO OCEAN PLATEAU 9360 .2 .0 * 47.5 46.2 103
WILLOW CREEK 8450 .0 .0 100* 59.4 47.5 126
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Basin wide percent of average * 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M .3 * -M 32.5 *
BLACK BEAR 7950 .0 .3 0* 71.4 60.8 118
CANYON 7940 .0 .2 0* 30.4 27.0 113
FISHER CREEK 9100 .0 .3 0* 55.5 58.0 96
MADISON PLATEAU 7750 .0 .2 0* 47.0 41.9 113
NORTHEAST ENTRANCE 7350 .0 .0 100* 25.8 24.5 106
PARKER PEAK 9400 .0 .4 0* -M 31.0 *
SYLVAN LAKE 8420 .0 .4 0* 44.2 36.4 122
THUMB DIVIDE 7980 .0 .0 100* 35.7 31.4 114
TWO OCEAN PLATEAU 9360 .2 .0 * 47.5 46.2 103
WHISKEY CREEK 6800 .0 .0 100* 39.0 35.9 109
WHITE MILL 8700 .2 .2 100* 39.0 46.2 85
WOLVERINE 7650 .0 .0 100* 23.0 26.0 89
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Basin wide percent of average 8* 106
WIND RIVER
BURROUGHS CREEK 8750 .2 .2 100* 32.4 29.0 112
COLD SPRINGS 9630 .3 .2 200* 30.5 22.5 136
DEER PARK 9700 .8 -M * 43.3 -M *
HOBBS PARK 10100 1.0 .2 1000* 38.2 27.9 138
LITTLE WARM 9620 .0 .2 0* 32.2 26.4 123
SOUTH PASS 9040 .7 .2 601* -M 30.5 *
ST. LAWRENCE ALT 8620 .3 .0 * -M 20.5 *
TOGWOTEE PASS 9580 .2 .0 * 41.5 42.2 99
TOWNSEND CREEK 8700 .8 .0 * 32.5 24.9 132
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Basin wide percent of average 380* 120
BIGHORN BASIN
BALD MTN. 9375 .2 .3 50* 32.4 32.5 100
BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.3 *
BLACKWATER 9780 .0 .4 -0* 40.0 36.4 110
BONE SPRINGS DIV 9350 .0 .4 0* 33.5 31.4 108
EVENING STAR 9200 .0 .3 0* 51.3 43.8 118
GRAVE SPRINGS 8550 .2 .2 100* 24.4 23.5 104
KIRWIN 9550 .3 .2 200* 30.0 25.5 119
MARQUETTE 8760 .0 .2 -0* 31.0 25.5 123
MIDDLE POWDER 7760 .0 .2 0* 32.2 25.3 128
OWL CREEK 8975 .0 .2 0* 23.5 16.8 141
POWDER RIVER PASS 9480 .0 .2 0* 30.3 25.0 121
SHELL CREEK 9580 .0 .4 0* 30.2 27.9 109
SYLVAN LAKE 8420 .0 .4 0* 44.2 36.4 122
SYLVAN ROAD 8120 .0 .2 0* 30.4 31.7 96
TIMBER CREEK 7950 .4 .0 * 25.7 20.5 125
YOUNTS PEAK 8350 .0 .2 0* 33.2 30.5 109
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Basin wide percent of average 16* 114
SHOSHONE RIVER
BLACKWATER 9780 .0 .4 -0* 40.0 36.4 110
EVENING STAR 9200 .0 .3 0* 51.3 43.8 118
KIRWIN 9550 .3 .2 200* 30.0 25.5 119
MARQUETTE 8760 .0 .2 -0* 31.0 25.5 123
SYLVAN LAKE 8420 .0 .4 0* 44.2 36.4 122
SYLVAN ROAD 8120 .0 .2 0* 30.4 31.7 96
YOUNTS PEAK 8350 .0 .2 0* 33.2 30.5 109
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Basin wide percent of average 17* 114
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.3 *
BIG GOOSE 7990 .0 -M * 25.2 -M *
BONE SPRINGS DIV 9350 .0 .4 0* 33.5 31.4 108
BURGESS JUNCTION 7880 .2 .2 100* 24.4 24.5 100
CLOUD PEAK RESERVOIR 9860 .0 .2 0* 33.0 29.5 112
DOME LAKE 8880 .0 .2 0* 24.5 27.4 90
GRAVE SPRINGS 8550 .2 .2 100* 24.4 23.5 104
HANSEN SAWMILL 8760 .3 .2 200* 23.8 20.3 118
MIDDLE POWDER 7760 .0 .2 0* 32.2 25.3 128
POWDER RIVER PASS 9480 .0 .2 0* 30.3 25.0 121
SUCKER CREEK 8880 .0 .2 0* 31.2 28.4 110
TIE CREEK 6870 .0 -M * 27.8 23.7 118
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Basin wide percent of average 34* 111
BELLE FOURCHE
BLIND PARK 6890 .0 .2 -0* 32.9 28.0 118
NORTH RAPID CREEK 6130 .0 -M * 30.0 -M *
WARREN PEAK 6520 .0 .2 0* 31.4 21.5 146
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Basin wide percent of average 0* 130
UPPER N. PLATTE RIVER
COLUMBINE 9400 .4 .0 * 36.7 36.8 100
DIVIDE PEAK 8800 .3 .0 * 40.7 36.9 111
ELK RIVER 8700 .0 .0 100* 39.0 30.5 128
JOE WRIGHT 10120 .3 .0 * 44.3 45.0 99
NORTH FRENCH CREEK 10100 .2 .0 * 44.3 39.5 112
OLD BATTLE 10000 .0 .3 0* 58.5 47.4 124
SOUTH BRUSH CREEK 8400 .0 .0 100* 33.9 30.5 111
TOWER 10500 .5 .0 * 58.7 57.9 102
WEBBER SPRINGS 9200 .2 .0 * 43.5 40.7 108
WILLOW CREEK PASS 9540 .0 .0 100* 25.7 25.7 100
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Basin wide percent of average 0* 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .2 .2 100* 41.4 33.5 124
CASPER MTN. 7900 .3 .0 * 31.0 29.4 106
DEADMAN HILL 10220 .0 .0 100* 31.5 32.2 99
DEER PARK 9700 .8 -M * 43.3 -M *
LAPRELE CREEK 8320 .0 .0 100* 29.0 24.9 117
RENO HILL 8400 .2 .0 * 32.9 30.4 109
ROACH 9700 .0 .0 100* 34.0 37.2 92
SAND LAKE 10080 .0 .0 100* 48.3 35.0 139
SOUTH PASS 9040 .7 .2 601* -M 30.5 *
WINDY PEAK 7840 .0 .0 100* 26.5 21.7 123
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Basin wide percent of average 351* 113
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 27.5 25.5 108
DIVIDE PEAK 8800 .3 .0 * 40.7 36.9 111
OLD BATTLE 10000 .0 .3 0* 58.5 47.4 124
SANDSTONE RS 8150 .0 .0 100* 33.0 32.5 102
WHISKEY PARK 8950 .0 .0 100* 46.0 44.3 105
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Basin wide percent of average 0* 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .0 100* 27.3 26.0 106
BLIND BULL SUM 8650 .4 .0 * 36.2 34.5 105
EAST RIM DIVIDE 7930 .4 .0 * 24.4 24.2 101
ELKHART PARK G.S. 9400 .4 .0 * 29.0 25.5 114
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.5 25.4 105
KENDALL R.S. 7740 .0 .0 100* 27.2 24.8 110
LOOMIS PARK 8240 .2 .0 * 31.7 30.0 106
NEW FORK LAKE 8340 .0 .0 100* 24.9 23.0 108
SNIDER BASIN 8250 .0 .0 100* 29.3 24.2 122
SPRING CREEK DIVIDE 9000 .5 .0 * 44.0 39.7 111
TRIPLE PEAK 8500 .0 .0 100* 46.4 46.5 100
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Basin wide percent of average * 108
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 24.8 21.4 116
HEWINTA 9500 .2 .0 * 28.0 25.5 110
HICKERSON PARK 9150 .0 .0 100* 23.4 21.5 109
HOLE-IN-ROCK 9150 .0 .0 100* 23.8 21.5 111
INDIAN CREEK 9425 .5 .0 * 41.5 38.5 108
KELLEY R.S. 8180 .0 .0 100* 31.3 30.0 105
STEEL CREEK PARK 10100 .0 .3 0* 33.3 29.9 112
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Basin wide percent of average 0* 110
UPPER BEAR RIVER
BUG LAKE 7950 .2 .2 100* 34.5 29.5 118
HAYDEN FORK 9400 .3 .2 200* 36.9 33.0 112
KELLEY R.S. 8180 .0 .0 100* 31.3 30.0 105
LILY LAKE 9050 .8 .2 701* 32.9 27.4 121
MONTE CRISTO 8960 .0 .2 -0* 44.9 39.8 113
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.0 117
TRIAL LAKE 9960 .2 .2 100* 39.8 39.0 102
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Basin wide percent of average 221* 112
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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.