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 29 , 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 34.0 111
COTTONWOOD CREEK 7600 .2 .0 * 45.3 37.5 121
GRANITE CREEK 6770 .0 .0 100* 35.3 38.0 93
GRASSY LAKE 7265 .0 .0 100* 60.5 56.0 109
GROS VENTRE SUMMIT 8775 .3 .0 * 26.7 25.9 104
LEWIS LAKE DIVIDE 7860 .0 .0 100* 54.7 57.0 96
PHILLIPS BENCH 8200 .0 .0 100* 45.8 44.9 103
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.4 116
SNAKE RIVER STATION 6920 .0 .0 100* 40.0 39.3 102
SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.2 110
THUMB DIVIDE 7980 -M .0 * -M 31.9 *
TOGWOTEE PASS 9580 .4 .0 * 42.0 42.8 99
TWO OCEAN PLATEAU 9360 .9 .0 * 47.5 46.9 102
WILLOW CREEK 8450 .0 .0 100* 59.5 48.2 124
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Basin wide percent of average * 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 .3 .7 34* 37.4 32.9 114
BLACK BEAR 7950 .0 .5 -0* 71.3 61.7 116
CANYON 7940 .0 .2 0* 30.4 27.7 110
FISHER CREEK 9100 .5 .5 125* 55.8 59.0 95
MADISON PLATEAU 7750 .0 .3 -0* 46.9 42.7 110
NORTHEAST ENTRANCE 7350 .0 .0 100* 25.9 25.2 103
PARKER PEAK 9400 .5 .9 50* 35.3 31.8 112
SYLVAN LAKE 8420 .0 .8 0* 44.3 37.3 119
THUMB DIVIDE 7980 -M .0 * -M 31.9 *
TWO OCEAN PLATEAU 9360 .9 .0 * 47.5 46.9 102
WHISKEY CREEK 6800 -M .0 * -M 36.5 *
WHITE MILL 8700 .3 .4 67* 39.3 47.0 84
WOLVERINE 7650 .0 .0 100* 23.3 26.7 88
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Basin wide percent of average 38* 105
WIND RIVER
BURROUGHS CREEK 8750 .4 .2 301* 32.5 29.8 110
COLD SPRINGS 9630 .8 .2 701* 31.2 23.2 135
DEER PARK 9700 .8 -M * 43.9 -M *
HOBBS PARK 10100 1.3 .4 400* 39.4 28.5 139
LITTLE WARM 9620 .0 .2 0* 32.4 27.0 120
SOUTH PASS 9040 .9 .3 400* 40.5 31.0 131
ST. LAWRENCE ALT 8620 1.4 .0 * 28.5 21.0 136
TOGWOTEE PASS 9580 .4 .0 * 42.0 42.8 99
TOWNSEND CREEK 8700 .0 .0 * 33.5 25.5 132
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Basin wide percent of average 375* 123
BIGHORN BASIN
BALD MTN. 9375 .2 .7 17* 32.5 33.3 98
BEAR TRAP MEADOW 7900 .2 .2 100* 23.9 20.8 115
BLACKWATER 9780 .3 .8 29* 40.3 37.4 108
BONE SPRINGS DIV 9350 .4 .9 38* 34.0 32.3 106
EVENING STAR 9200 .3 .5 41* 51.9 45.0 116
GRAVE SPRINGS 8550 .2 .3 50* 24.7 24.3 102
KIRWIN 9550 .7 .4 200* 30.9 26.4 118
MARQUETTE 8760 .4 .4 100* 31.8 26.2 122
MIDDLE POWDER 7760 .2 .4 34* 32.5 25.9 126
OWL CREEK 8975 .5 .4 134* 24.0 17.2 140
POWDER RIVER PASS 9480 .2 .3 50* 30.8 25.7 120
SHELL CREEK 9580 .5 .8 72* 30.9 28.5 109
SYLVAN LAKE 8420 .0 .8 0* 44.3 37.3 119
SYLVAN ROAD 8120 .0 .4 -0* 30.7 32.5 95
TIMBER CREEK 7950 .7 .0 * 26.4 21.2 125
YOUNTS PEAK 8350 .2 .4 34* 33.4 31.4 107
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Basin wide percent of average 50* 113
SHOSHONE RIVER
BLACKWATER 9780 .3 .8 29* 40.3 37.4 108
EVENING STAR 9200 .3 .5 41* 51.9 45.0 116
KIRWIN 9550 .7 .4 200* 30.9 26.4 118
MARQUETTE 8760 .4 .4 100* 31.8 26.2 122
SYLVAN LAKE 8420 .0 .8 0* 44.3 37.3 119
SYLVAN ROAD 8120 .0 .4 -0* 30.7 32.5 95
YOUNTS PEAK 8350 .2 .4 34* 33.4 31.4 107
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Basin wide percent of average 46* 112
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .2 .2 100* 23.9 20.8 115
BIG GOOSE 7990 .3 -M * 25.9 -M *
BONE SPRINGS DIV 9350 .4 .9 38* 34.0 32.3 106
BURGESS JUNCTION 7880 .4 .4 100* 24.9 25.3 99
CLOUD PEAK RESERVOIR 9860 .7 .3 301* 34.3 30.3 114
DOME LAKE 8880 .5 .4 167* 25.4 28.2 91
GRAVE SPRINGS 8550 .2 .3 50* 24.7 24.3 102
HANSEN SAWMILL 8760 .2 .2 100* 24.3 20.9 117
MIDDLE POWDER 7760 .2 .4 34* 32.5 25.9 126
POWDER RIVER PASS 9480 .2 .3 50* 30.8 25.7 120
SUCKER CREEK 8880 .5 .3 200* 31.8 29.0 110
TIE CREEK 6870 .3 -M * 28.5 24.3 118
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Basin wide percent of average 97* 110
BELLE FOURCHE
BLIND PARK 6890 .0 .2 -0* -M 28.5 *
NORTH RAPID CREEK 6130 .0 -M * -M -M *
WARREN PEAK 6520 -M .2 * -M 22.0 *
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Basin wide percent of average 0* *
UPPER N. PLATTE RIVER
COLUMBINE 9400 .4 .0 * 36.8 37.3 99
DIVIDE PEAK 8800 .5 .0 * 41.4 37.7 110
ELK RIVER 8700 .0 .0 100* 39.0 31.0 126
JOE WRIGHT 10120 .4 .0 * 45.0 45.9 99
NORTH FRENCH CREEK 10100 .3 .0 * 44.3 40.3 110
OLD BATTLE 10000 .4 .5 76* 59.0 48.3 123
SOUTH BRUSH CREEK 8400 .0 .0 100* 35.0 31.3 113
TOWER 10500 .4 .0 * 59.0 58.7 101
WEBBER SPRINGS 9200 .5 .0 * 44.5 41.5 107
WILLOW CREEK PASS 9540 .0 .0 100* 25.5 26.3 98
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Basin wide percent of average 76* 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .3 .3 100* -M 34.0 *
CASPER MTN. 7900 .9 .0 * 32.0 29.9 108
DEADMAN HILL 10220 .8 .0 * 32.7 32.8 100
DEER PARK 9700 .8 -M * 43.9 -M *
LAPRELE CREEK 8320 .4 .0 * 29.7 25.4 117
RENO HILL 8400 1.0 .0 * 33.8 30.9 110
ROACH 9700 .7 .0 * 34.8 37.9 92
SAND LAKE 10080 .5 .0 * 49.2 35.7 138
SOUTH PASS 9040 .9 .3 400* 40.5 31.0 131
WINDY PEAK 7840 .4 .0 * 27.2 22.0 124
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Basin wide percent of average 251* 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 28.0 26.3 107
DIVIDE PEAK 8800 .5 .0 * 41.4 37.7 110
OLD BATTLE 10000 .4 .5 76* 59.0 48.3 123
SANDSTONE RS 8150 .0 .0 100* 33.4 33.4 100
WHISKEY PARK 8950 .0 .0 100* 46.4 44.8 104
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Basin wide percent of average 76* 110
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .2 .0 * 27.5 26.4 105
BLIND BULL SUM 8650 .3 .0 * 36.7 35.0 105
EAST RIM DIVIDE 7930 .0 .0 100* 24.5 24.7 100
ELKHART PARK G.S. 9400 .0 .0 100* 29.0 26.0 112
GROS VENTRE SUMMIT 8775 .3 .0 * 26.7 25.9 104
KENDALL R.S. 7740 .0 .0 100* 27.2 25.3 108
LOOMIS PARK 8240 .2 .0 * 31.8 30.5 104
NEW FORK LAKE 8340 .0 .0 100* 24.9 23.5 106
SNIDER BASIN 8250 .0 .0 100* 29.3 24.7 119
SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.2 110
TRIPLE PEAK 8500 .0 .0 100* 46.5 47.3 99
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Basin wide percent of average * 106
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 24.8 21.8 114
HEWINTA 9500 .0 .0 100* 28.4 25.9 110
HICKERSON PARK 9150 .0 .0 100* 23.5 22.0 107
HOLE-IN-ROCK 9150 .0 .0 100* 23.9 22.0 109
INDIAN CREEK 9425 .0 .0 100* 41.7 39.2 107
KELLEY R.S. 8180 .0 .0 100* 31.3 30.5 103
STEEL CREEK PARK 10100 -M .5 * 33.5 30.5 111
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Basin wide percent of average * 109
UPPER BEAR RIVER
BUG LAKE 7950 .2 .3 50* 34.4 30.0 115
HAYDEN FORK 9400 .3 .2 200* 37.0 33.7 110
KELLEY R.S. 8180 .0 .0 100* 31.3 30.5 103
LILY LAKE 9050 .0 .3 -0* 33.0 27.9 119
MONTE CRISTO 8960 -M .4 * 44.9 40.5 111
SALT RIVER SUMMIT 7600 .2 .0 * 31.5 27.4 116
TRIAL LAKE 9960 .0 .4 0* 40.2 39.8 102
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Basin wide percent of average 38* 110
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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.