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 SATURDAY: OCTOBER 20 , 2001
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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 .2 50* 1.6 1.2 133
COTTONWOOD CREEK 7600 .6 .2 300* 1.3 1.3 100
GRANITE CREEK 6770 .1 .2 50* 1.5 1.4 107
GRASSY LAKE 7265 1.6 .3 533* 2.2 2.0 110
GROS VENTRE SUMMIT 8775 1.0 .3 333* .6 1.0 60
LEWIS LAKE DIVIDE 7860 1.4 .4 350* 1.9 2.1 90
PHILLIPS BENCH 8200 1.6 .4 400* 1.7 1.6 106
SALT RIVER SUMMIT 7600 .1 .0 * .8 1.0 80
SNAKE RIVER STATION 6920 .6 .2 300* 1.5 1.4 107
SPRING CREEK DIVIDE 9000 1.7 .4 425* 1.9 1.3 146
THUMB DIVIDE 7980 .9 .1 900* 1.0 1.2 83
TOGWOTEE PASS 9580 2.3 1.4 164* 2.4 1.5 160
TWO OCEAN PLATEAU 9360 2.0 1.9 105* 1.5 1.7 88
WILLOW CREEK 8450 .2 .4 50* 1.4 1.7 82
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Basin wide percent of average 220* 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 2.1 1.9 111* 2.1 1.2 175
BLACK BEAR 7950 -M 1.6 * -M 2.1 *
CANYON 7940 .8 .4 200* 1.3 1.1 118
FISHER CREEK 9100 2.2 1.4 157* 2.6 1.8 144
MADISON PLATEAU 7750 1.4 .8 175* 2.1 1.5 140
NORTHEAST ENTRANCE 7350 .0 .1 0* 1.0 .9 111
PARKER PEAK 9400 1.2 2.3 52* 1.2 1.3 92
SYLVAN LAKE 8420 1.8 1.5 120* 2.2 1.6 138
THUMB DIVIDE 7980 .9 .1 900* 1.0 1.2 83
TWO OCEAN PLATEAU 9360 2.0 1.9 105* 1.5 1.7 88
WHISKEY CREEK 6800 1.1 .4 275* 1.5 1.3 115
WHITE MILL 8700 1.9 1.1 173* 1.7 1.7 100
WOLVERINE 7650 .1 .2 50* 1.7 1.0 170
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Basin wide percent of average 128* 122
WIND RIVER
BURROUGHS CREEK 8750 1.2 .5 240* 1.4 1.0 140
COLD SPRINGS 9630 .2 .5 40* .5 1.2 42
DEER PARK 9700 .9 -M * 1.0 -M *
HOBBS PARK 10100 .8 1.2 67* .8 1.2 67
LITTLE WARM 9620 1.1 .6 183* 1.3 1.1 118
SOUTH PASS 9040 .3 1.7 18* 1.1 1.3 85
ST. LAWRENCE ALT 8620 .2 .4 50* .3 1.0 30
TOGWOTEE PASS 9580 2.3 1.4 164* 2.4 1.5 160
TOWNSEND CREEK 8700 .2 .5 40* .4 1.2 33
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Basin wide percent of average 93* 86
BIGHORN BASIN
BALD MTN. 9375 2.9 1.8 161* 2.8 1.4 200
BEAR TRAP MEADOW 7900 1.0 .3 333* 1.8 1.0 180
BLACKWATER 9780 1.3 1.7 76* 1.3 1.5 87
BONE SPRINGS DIV 9350 2.6 2.0 130 2.7 1.3 208
EVENING STAR 9200 1.8 2.3 78* 2.8 1.8 156
GRAVE SPRINGS 8550 1.1 .6 183* 2.2 1.2 183
KIRWIN 9550 1.2 .9 133* 1.2 1.0 120
MARQUETTE 8760 .6 .6 100* 1.1 1.1 100
MIDDLE POWDER 7760 1.4 .8 175* 2.1 1.3 162
OWL CREEK 8975 .1 .4 25* .4 .6 67
POWDER RIVER PASS 9480 1.2 .7 171* 2.1 1.2 175
SHELL CREEK 9580 2.6 1.8 144 2.6 1.2 217
SYLVAN LAKE 8420 1.8 1.5 120* 2.2 1.6 138
SYLVAN ROAD 8120 .8 .9 89* 1.8 1.3 138
TIMBER CREEK 7950 .2 .2 100* .9 .8 112
YOUNTS PEAK 8350 1.4 1.4 100* 1.4 1.2 117
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Basin wide percent of average 123* 151
SHOSHONE RIVER
BLACKWATER 9780 1.3 1.7 76* 1.3 1.5 87
EVENING STAR 9200 1.8 2.3 78* 2.8 1.8 156
KIRWIN 9550 1.2 .9 133* 1.2 1.0 120
MARQUETTE 8760 .6 .6 100* 1.1 1.1 100
SYLVAN LAKE 8420 1.8 1.5 120* 2.2 1.6 138
SYLVAN ROAD 8120 .8 .9 89* 1.8 1.3 138
YOUNTS PEAK 8350 1.4 1.4 100* 1.4 1.2 117
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Basin wide percent of average 96* 124
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.0 .3 333* 1.8 1.0 180
BIG GOOSE 7990 1.2 -M * 2.7 -M *
BONE SPRINGS DIV 9350 2.6 2.0 130 2.7 1.3 208
BURGESS JUNCTION 7880 1.4 1.0 140* 2.5 1.2 208
CLOUD PEAK RESERVOIR 9860 1.5 .8 188* 3.1 1.3 238
DOME LAKE 8880 1.8 1.2 150* 2.8 1.4 200
GRAVE SPRINGS 8550 1.1 .6 183* 2.2 1.2 183
HANSEN SAWMILL 8760 .3 .4 75* 1.6 1.0 160
MIDDLE POWDER 7760 1.4 .8 175* 2.1 1.3 162
POWDER RIVER PASS 9480 1.2 .7 171* 2.1 1.2 175
SUCKER CREEK 8880 2.1 .8 262* 3.4 1.3 262
TIE CREEK 6870 .1 -M * 2.5 1.2 208
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Basin wide percent of average 167* 200
BELLE FOURCHE
BLIND PARK 6890 .3 1.0 30* 2.3 1.1 209
COLE CANYON 5910 .0 .3 0* 1.0 .9 111
NORTH RAPID CREEK 6130 .5 -M * 2.1 -M *
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Basin wide percent of average 23* 165
UPPER N. PLATTE RIVER
COLUMBINE 9400 .2 .8 25* 1.9 1.5 127
DIVIDE PEAK 8800 1.1 1.0 110* 1.7 1.9 89
ELK RIVER 8700 .1 .1 100* 1.4 1.4 100
JOE WRIGHT 10120 1.3 1.7 76* 1.6 2.1 76
NORTH FRENCH CREEK 10100 2.7 1.1 245* 2.6 1.4 186
OLD BATTLE 10000 1.0 2.3 43* 2.2 2.0 110
SOUTH BRUSH CREEK 8400 .2 .2 100* 1.5 1.4 107
TOWER 10500 1.9 3.2 59* 2.2 2.5 88
WEBBER SPRINGS 9200 .6 .9 67* 1.6 1.8 89
WILLOW CREEK PASS 9540 .0 .5 0* .5 1.1 45
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Basin wide percent of average 77* 101
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 1.7 1.2 142* 2.2 1.5 147
CASPER MTN. 7900 2.2 .7 314* 3.0 1.5 200
DEADMAN HILL 10220 .6 .7 86* 1.1 1.5 73
DEER PARK 9700 .9 -M * 1.0 -M *
LAPRELE CREEK 8320 -M .3 * 2.8 .9 311
RENO HILL 8400 2.2 .9 244* 3.0 1.5 200
ROACH 9700 .3 .7 43* .9 1.7 53
SAND LAKE 10080 2.9 1.5 193* 2.9 1.6 181
SOUTH PASS 9040 .3 1.7 18* 1.1 1.3 85
WINDY PEAK 7840 .3 .1 300* 2.5 .7 357
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Basin wide percent of average 140* 160
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .1 100* 1.2 1.1 109
DIVIDE PEAK 8800 1.1 1.0 110* 1.7 1.9 89
OLD BATTLE 10000 1.0 2.3 43* 2.2 2.0 110
SANDSTONE RS 8150 -M .2 * 1.8 1.0 180
WHISKEY PARK 8950 .9 1.1 82* 2.1 1.2 175
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Basin wide percent of average 69* 125
UPPER GREEN RIVER
BIG SANDY OPENING 9100 -M .2 * .4 1.0 40
BLIND BULL SUM 8650 1.9 .7 271* 1.6 1.2 133
EAST RIM DIVIDE 7930 .6 .1 600* .6 .9 67
ELKHART PARK G.S. 9400 .7 .3 233* .6 1.0 60
GROS VENTRE SUMMIT 8775 1.0 .3 333* .6 1.0 60
KENDALL R.S. 7740 .0 .0 100* .8 .9 89
LOOMIS PARK 8240 1.1 .1 1100* 1.2 1.1 109
NEW FORK LAKE 8340 .6 .0 * .8 .9 89
SNIDER BASIN 8250 1.0 .0 * 1.4 .9 156
SPRING CREEK DIVIDE 9000 1.7 .4 425* 1.9 1.3 146
TRIPLE PEAK 8500 1.4 .3 467* 2.2 1.7 129
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Basin wide percent of average 382* 102
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 * .2 .8 25
HEWINTA 9500 .0 .1 0* 1.3 1.5 87
HICKERSON PARK 9150 .1 .1 100* .6 1.3 46
HOLE-IN-ROCK 9150 .0 .0 100* 1.2 1.3 92
INDIAN CREEK 9425 .8 .5 160* .7 1.4 50
KELLEY R.S. 8180 .2 .1 200* .5 1.1 45
STEEL CREEK PARK 10100 .7 1.2 58* .9 1.5 60
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Basin wide percent of average 90* 61
UPPER BEAR RIVER
BUG LAKE 7950 .0 .7 0* .4 2.0 20
HAYDEN FORK 9400 .0 .5 0* 1.0 1.5 67
KELLEY R.S. 8180 .2 .1 200* .5 1.1 45
LILY LAKE 9050 .0 .6 0* 1.1 1.7 65
MONTE CRISTO 8960 .0 .9 0* .9 2.1 43
SALT RIVER SUMMIT 7600 .1 .0 * .8 1.0 80
TRIAL LAKE 9960 .0 1.1 0* 1.3 1.8 72
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Basin wide percent of average 5* 54
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
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.