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 27 , 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* 37.5 33.9 111
COTTONWOOD CREEK 7600 .2 .0 * 45.4 37.5 122
GRANITE CREEK 6770 .0 .0 100* 35.3 38.0 93
GRASSY LAKE 7265 .0 .0 100* 60.5 55.8 109
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.5 25.8 104
LEWIS LAKE DIVIDE 7860 .0 .0 100* 54.7 56.8 97
PHILLIPS BENCH 8200 .0 .0 100* 45.7 44.8 103
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.3 116
SNAKE RIVER STATION 6920 .0 .0 100* 40.0 39.2 103
SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.0 111
THUMB DIVIDE 7980 .0 .0 100* 35.7 31.8 113
TOGWOTEE PASS 9580 .0 .0 100* 41.9 42.7 99
TWO OCEAN PLATEAU 9360 .2 .0 * 47.5 46.7 102
WILLOW CREEK 8450 .0 .0 100* 59.4 48.0 124
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Basin wide percent of average * 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M .5 * -M 32.8 *
BLACK BEAR 7950 .0 .5 -0* 71.3 61.5 116
CANYON 7940 .0 .2 -0* 30.4 27.5 111
FISHER CREEK 9100 .2 .5 25* 55.5 58.8 95
MADISON PLATEAU 7750 .0 .3 -0* 46.9 42.5 111
NORTHEAST ENTRANCE 7350 .0 .0 100* 25.9 25.0 104
PARKER PEAK 9400 .2 .8 15* -M 31.5 *
SYLVAN LAKE 8420 .0 .7 0* 44.3 37.0 120
THUMB DIVIDE 7980 .0 .0 100* 35.7 31.8 113
TWO OCEAN PLATEAU 9360 .2 .0 * 47.5 46.7 102
WHISKEY CREEK 6800 .2 .0 * 38.5 36.5 106
WHITE MILL 8700 .2 .4 34* 39.2 46.8 84
WOLVERINE 7650 .0 .0 100* 23.4 26.5 88
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Basin wide percent of average 12* 105
WIND RIVER
BURROUGHS CREEK 8750 .0 .2 0* 32.4 29.5 110
COLD SPRINGS 9630 .0 .2 0* 30.4 23.0 133
DEER PARK 9700 .2 -M * 43.3 -M *
HOBBS PARK 10100 .3 .4 67* 38.4 28.4 136
LITTLE WARM 9620 .0 .2 0* 32.2 26.9 120
SOUTH PASS 9040 .2 .3 50* 39.9 31.0 129
ST. LAWRENCE ALT 8620 .3 .0 * 27.2 20.9 131
TOGWOTEE PASS 9580 .0 .0 100* 41.9 42.7 99
TOWNSEND CREEK 8700 .2 .0 * 32.8 25.4 130
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Basin wide percent of average 38* 121
BIGHORN BASIN
BALD MTN. 9375 .2 .5 21* 32.5 33.0 99
BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.7 *
BLACKWATER 9780 .0 .7 -0* 40.2 37.2 109
BONE SPRINGS DIV 9350 .2 .8 15* 33.9 32.0 106
EVENING STAR 9200 .0 .5 -0* 51.5 44.7 116
GRAVE SPRINGS 8550 .2 .3 50* 24.7 24.2 103
KIRWIN 9550 .0 .4 0* 30.0 26.2 115
MARQUETTE 8760 .0 .4 -0* 31.0 26.0 120
MIDDLE POWDER 7760 .0 .4 0* 32.4 25.8 126
OWL CREEK 8975 .0 .4 0* 23.5 17.0 138
POWDER RIVER PASS 9480 .0 .3 0* 30.8 25.5 121
SHELL CREEK 9580 .4 .7 50* 30.5 28.4 108
SYLVAN LAKE 8420 .0 .7 0* 44.3 37.0 120
SYLVAN ROAD 8120 .0 .4 0* 30.7 32.3 96
TIMBER CREEK 7950 .0 .0 100* 25.7 21.0 122
YOUNTS PEAK 8350 .0 .4 -0* 33.2 31.2 107
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Basin wide percent of average 11* 113
SHOSHONE RIVER
BLACKWATER 9780 .0 .7 -0* 40.2 37.2 109
EVENING STAR 9200 .0 .5 -0* 51.5 44.7 116
KIRWIN 9550 .0 .4 0* 30.0 26.2 115
MARQUETTE 8760 .0 .4 -0* 31.0 26.0 120
SYLVAN LAKE 8420 .0 .7 0* 44.3 37.0 120
SYLVAN ROAD 8120 .0 .4 0* 30.7 32.3 96
YOUNTS PEAK 8350 .0 .4 -0* 33.2 31.2 107
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Basin wide percent of average 0* 112
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.7 *
BIG GOOSE 7990 -M -M * -M -M *
BONE SPRINGS DIV 9350 .2 .8 15* 33.9 32.0 106
BURGESS JUNCTION 7880 .0 .4 0* 24.5 25.2 98
CLOUD PEAK RESERVOIR 9860 .5 .3 250* 34.0 30.0 114
DOME LAKE 8880 .2 .4 34* 25.0 28.0 90
GRAVE SPRINGS 8550 .2 .3 50* 24.7 24.2 103
HANSEN SAWMILL 8760 .0 .2 0* 24.0 20.8 116
MIDDLE POWDER 7760 .0 .4 0* 32.4 25.8 126
POWDER RIVER PASS 9480 .0 .3 0* 30.8 25.5 121
SUCKER CREEK 8880 .2 .3 50* 31.4 28.9 109
TIE CREEK 6870 .2 -M * 28.2 24.2 117
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Basin wide percent of average 35* 110
BELLE FOURCHE
BLIND PARK 6890 .0 .2 0* 32.9 28.5 116
NORTH RAPID CREEK 6130 .2 -M * 30.2 -M *
WARREN PEAK 6520 .2 .2 100* 31.5 22.0 144
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Basin wide percent of average 50* 128
UPPER N. PLATTE RIVER
COLUMBINE 9400 .3 .0 * 36.7 37.2 99
DIVIDE PEAK 8800 .2 .0 * 41.0 37.5 110
ELK RIVER 8700 .0 .0 100* 38.9 31.0 126
JOE WRIGHT 10120 .3 .0 * 44.8 45.7 99
NORTH FRENCH CREEK 10100 .0 .0 100* 44.3 40.0 111
OLD BATTLE 10000 .0 .5 -0* 58.8 48.0 123
SOUTH BRUSH CREEK 8400 .0 .0 100* 34.9 31.0 113
TOWER 10500 .3 .0 * 59.0 58.5 101
WEBBER SPRINGS 9200 .2 .0 * 44.0 41.4 107
WILLOW CREEK PASS 9540 .0 .0 100* 25.7 26.2 99
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Basin wide percent of average 0* 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .0 .3 0* 41.4 34.0 122
CASPER MTN. 7900 .3 .0 * 31.2 29.8 105
DEADMAN HILL 10220 .0 .0 100* 31.8 32.7 98
DEER PARK 9700 .2 -M * 43.3 -M *
LAPRELE CREEK 8320 .2 .0 * 29.2 25.3 116
RENO HILL 8400 .3 .0 * 33.0 30.8 108
ROACH 9700 .0 .0 100* 34.2 37.8 91
SAND LAKE 10080 .0 .0 100* 48.7 35.5 138
SOUTH PASS 9040 .2 .3 50* 39.9 31.0 129
WINDY PEAK 7840 .2 .0 * 26.8 22.0 122
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Basin wide percent of average 25* 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 27.7 26.2 106
DIVIDE PEAK 8800 .2 .0 * 41.0 37.5 110
OLD BATTLE 10000 .0 .5 -0* 58.8 48.0 123
SANDSTONE RS 8150 .0 .0 100* 33.2 33.2 100
WHISKEY PARK 8950 .0 .0 100* 46.3 44.7 104
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Basin wide percent of average 0* 110
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .0 100* 27.4 26.3 105
BLIND BULL SUM 8650 .0 .0 100* 36.4 35.0 105
EAST RIM DIVIDE 7930 .0 .0 100* 24.4 24.5 100
ELKHART PARK G.S. 9400 .0 .0 100* 29.0 25.9 113
GROS VENTRE SUMMIT 8775 .0 .0 100* 26.5 25.8 104
KENDALL R.S. 7740 .0 .0 100* 27.0 25.2 108
LOOMIS PARK 8240 .2 .0 * 31.7 30.5 104
NEW FORK LAKE 8340 .0 .0 100* 24.8 23.5 106
SNIDER BASIN 8250 .0 .0 100* 29.3 24.5 120
SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.0 111
TRIPLE PEAK 8500 .0 .0 100* 46.5 47.0 99
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Basin wide percent of average * 106
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 24.9 21.7 115
HEWINTA 9500 .0 .0 100* 28.3 25.8 110
HICKERSON PARK 9150 .2 .0 * 23.5 21.9 108
HOLE-IN-ROCK 9150 .0 .0 100* 23.9 21.9 110
INDIAN CREEK 9425 .0 .0 100* 41.4 39.0 106
KELLEY R.S. 8180 .0 .0 100* 31.2 30.4 103
STEEL CREEK PARK 10100 -M .5 * 33.3 30.4 110
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Basin wide percent of average * 109
UPPER BEAR RIVER
BUG LAKE 7950 .2 .3 50* 34.5 30.0 116
HAYDEN FORK 9400 .3 .2 200* 37.0 33.5 111
KELLEY R.S. 8180 .0 .0 100* 31.2 30.4 103
LILY LAKE 9050 .8 .3 351* 33.0 27.8 120
MONTE CRISTO 8960 -M .4 * 44.9 40.3 112
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.3 116
TRIAL LAKE 9960 .2 .4 34* 40.0 39.5 102
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Basin wide percent of average 138* 111
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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.