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: OCTOBER 20 , 2008
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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 .2 0 1.5 1.2 125
COTTONWOOD CREEK 7670 .0 .3 0 1.4 1.7 82
GRAND TARGHEE 9260 1.1 -M * 3.1 -M *
GRANITE CREEK 6770 .2 .2 100 1.6 1.0 160
GRASSY LAKE 7265 .1 .5 20 1.9 1.9 100
GROS VENTRE SUMMIT 8750 1.4 .8 175 1.8 1.1 164
GUNSIGHT PASS 9820 .5 -M * 1.1 -M *
LEWIS LAKE DIVIDE 7850 .2 .3 67 2.0 1.7 118
PHILLIPS BENCH 8200 .7 .5 140 1.6 1.3 123
SALT RIVER SUMMIT 7760 .0 .0 100 1.2 1.1 109
SNAKE RIVER STATION 6920 .0 .1 0 1.3 1.3 100
SPRING CREEK DIVIDE 9000 .6 .6 100 1.2 1.4 86
THUMB DIVIDE 7980 .0 .3 0 2.2 1.3 169
TOGWOTEE PASS 9580 1.5 1.4 107 2.0 1.6 125
TWO OCEAN PLATEAU 9240 1.7 1.7 100 1.5 1.8 83
WILLOW CREEK 8380 .1 .8 12 2.0 2.2 91
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Basin wide percent of average 84 113
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 1.2 1.7 71 1.4 1.2 117
BLACK BEAR 8170 1.2 1.1 109 3.3 1.9 174
CANYON 7870 .0 .3 0 .7 1.0 70
FISHER CREEK 9100 1.1 1.3 85 1.9 1.9 100
MADISON PLATEAU 7750 .6 .6 100 1.8 1.5 120
NORTHEAST ENTRANCE 7350 .1 .1 100 1.0 .9 111
PARKER PEAK 9400 1.5 1.8 83 1.4 1.5 93
SYLVAN LAKE 8420 .0 1.1 0 1.6 1.5 107
THUMB DIVIDE 7980 .0 .3 0 2.2 1.3 169
TWO OCEAN PLATEAU 9240 1.7 1.7 100 1.5 1.8 83
WHISKEY CREEK 6800 .2 .2 100 1.3 1.2 108
WHITE MILL 8700 1.1 .9 122 1.4 1.6 87
WOLVERINE 7650 .1 .2 50 1.1 1.2 92
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Basin wide percent of average 78 111
WIND RIVER
BURROUGHS CREEK 8750 1.7 .4 425 2.1 1.0 210
COLD SPRINGS 9630 1.4 .6 233 2.1 1.1 191
DEER PARK 9700 1.2 1.1 109 2.4 1.4 171
HOBBS PARK 10100 2.0 1.4 143 2.4 1.3 185
LITTLE WARM 9370 1.1 .7 157 1.6 1.0 160
SOUTH PASS 9040 1.3 .7 186 2.8 1.2 233
ST. LAWRENCE ALT 8620 1.5 .5 300 2.2 1.1 200
TOGWOTEE PASS 9580 1.5 1.4 107 2.0 1.6 125
TOWNSEND CREEK 8700 1.7 .6 283 2.6 1.3 200
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Basin wide percent of average 181 184
BIGHORN BASIN
BALD MTN. 9380 1.8 1.8 100 2.5 1.5 167
BEAR TRAP MEADOW 8200 .0 .4 0 1.6 1.1 145
BLACKWATER 9780 1.3 2.1 62 1.7 1.6 106
BONE SPRINGS DIV 9350 1.5 1.7 88 1.8 1.6 112
EVENING STAR 9200 1.3 1.6 81 1.9 1.6 119
GRAVE SPRINGS 8550 .9 .7 129 1.7 1.4 121
KIRWIN 9550 1.4 1.1 127 1.5 1.1 136
MARQUETTE 8760 1.2 1.3 92 1.8 1.4 129
MIDDLE POWDER 7760 .5 .9 56 1.7 1.7 100
OWL CREEK 8975 1.7 .6 283 1.7 .7 243
POWDER RIVER PASS 9480 .9 .8 112 1.7 1.2 142
SHELL CREEK 9580 2.0 1.9 105 2.4 1.3 185
SYLVAN LAKE 8420 .0 1.1 0 1.6 1.5 107
SYLVAN ROAD 7120 .2 .2 100 1.1 1.1 100
TIMBER CREEK 7950 1.2 .6 200 2.1 1.0 210
YOUNTS PEAK 8350 .9 .7 129 1.3 1.1 118
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Basin wide percent of average 96 134
SHOSHONE RIVER
BLACKWATER 9780 1.3 2.1 62 1.7 1.6 106
EVENING STAR 9200 1.3 1.6 81 1.9 1.6 119
KIRWIN 9550 1.4 1.1 127 1.5 1.1 136
MARQUETTE 8760 1.2 1.3 92 1.8 1.4 129
SYLVAN LAKE 8420 .0 1.1 0 1.6 1.5 107
SYLVAN ROAD 7120 .2 .2 100 1.1 1.1 100
YOUNTS PEAK 8350 .9 .7 129 1.3 1.1 118
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Basin wide percent of average 78 116
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .4 0 1.6 1.1 145
BIG GOOSE 7990 .4 .5 80 1.6 1.4 114
BONE SPRINGS DIV 9350 1.5 1.7 88 1.8 1.6 112
BURGESS JUNCTION 7880 .8 1.0 80 1.8 1.5 120
CLOUD PEAK RESERVOIR 9860 1.3 .9 144 1.5 1.7 88
DOME LAKE 8880 .8 1.1 73 1.5 1.6 94
GRAVE SPRINGS 8550 .9 .7 129 1.7 1.4 121
HANSEN SAWMILL 8360 .6 .4 150 1.3 1.2 108
MIDDLE POWDER 7760 .5 .9 56 1.7 1.7 100
POWDER RIVER PASS 9480 .9 .8 112 1.7 1.2 142
SUCKER CREEK 8880 1.0 .8 125 1.8 1.6 112
TIE CREEK 6870 .5 .4 125 2.8 1.7 165
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Basin wide percent of average 96 118
BELLE FOURCHE
BLIND PARK 6890 .0 .1 0 1.2 1.6 75
COLE CANYON 5910 .1 .4 25 2.7 1.2 225
NORTH RAPID CREEK 6130 .0 .2 0 1.7 1.6 106
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Basin wide percent of average 14 127
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .1 100 .4 1.3 31
DIVIDE PEAK 8880 .1 1.0 10 2.0 1.7 118
ELK RIVER 8700 .2 .2 100 1.1 1.3 85
JOE WRIGHT 10120 .0 1.3 0 .8 2.1 38
NORTH FRENCH CREEK 10130 .6 1.9 32 1.2 1.9 63
OLD BATTLE 10000 .2 1.6 12 1.3 2.1 62
SAGE CREEK BASIN 7850 .0 .6 0 .8 1.0 80
SOUTH BRUSH CREEK 8440 .0 .3 0 .9 1.6 56
TOWER 10500 .0 1.6 0 1.8 2.2 82
WEBBER SPRINGS 9250 .0 .8 0 .9 1.8 50
WILLOW CREEK PASS 9540 .0 .5 0 .6 1.2 50
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Basin wide percent of average 12 65
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .1 1.2 8 .5 1.4 36
CASPER MTN. 7900 .0 .9 0 1.6 1.5 107
DEADMAN HILL 10220 1.7 1.3 131 .5 1.5 33
DEER PARK 9700 1.2 1.1 109 2.4 1.4 171
LAPRELE CREEK 8375 .0 .4 0 .5 1.1 45
RENO HILL 8400 .8 1.0 80 1.2 1.5 80
ROACH 9700 .2 .5 40 .6 1.4 43
SAND LAKE 10050 .9 1.8 50 .8 1.8 44
SOUTH PASS 9040 1.3 .7 186 2.8 1.2 233
WINDY PEAK 7900 .6 .2 300 .8 1.1 73
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Basin wide percent of average 75 84
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .1 0 .6 1.1 55
DIVIDE PEAK 8880 .1 1.0 10 2.0 1.7 118
OLD BATTLE 10000 .2 1.6 12 1.3 2.1 62
SANDSTONE RS 8150 .0 .2 0 .6 1.4 43
WHISKEY PARK 8950 .1 .8 12 1.0 1.8 56
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Basin wide percent of average 11 68
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .8 .6 133 1.4 1.1 127
BLIND BULL SUM 8650 1.4 .7 200 2.0 1.2 167
EAST RIM DIVIDE 7930 .0 .2 0 1.8 .8 225
ELKHART PARK G.S. 9400 .9 .4 225 1.8 1.2 150
GROS VENTRE SUMMIT 8750 1.4 .8 175 1.8 1.1 164
GUNSIGHT PASS 9820 .5 -M * 1.1 -M *
KENDALL R.S. 7740 .2 .2 100 1.4 .9 156
LOOMIS PARK 8240 .8 .4 200 2.0 1.0 200
NEW FORK LAKE 8340 .3 .2 150 1.4 .9 156
SNIDER BASIN 8060 .5 .3 167 1.1 .9 122
SPRING CREEK DIVIDE 9000 .6 .6 100 1.2 1.4 86
TRIPLE PEAK 8500 1.0 .4 250 1.7 1.3 131
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Basin wide percent of average 165 149
LOWER GREEN RIVER
HAMS FORK 7840 .0 .1 0 1.3 .8 162
HEWINTA 9519 .0 .5 0 1.2 1.5 80
HICKERSON PARK 9145 .0 .1 0 1.2 1.0 120
HOLE-IN-ROCK 9150 .1 .2 50 1.7 1.1 155
INDIAN CREEK 9425 1.2 .7 171 1.6 1.4 114
KELLEY R.S. 8180 .2 .4 50 1.4 1.2 117
STEEL CREEK PARK 10200 .6 1.0 60 1.6 1.4 114
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Basin wide percent of average 70 119
UPPER BEAR RIVER
BUG LAKE 7950 .1 .7 14 1.3 1.4 93
HAYDEN FORK 9212 .1 .5 20 1.3 1.4 93
KELLEY R.S. 8180 .2 .4 50 1.4 1.2 117
LILY LAKE 9156 .1 .6 17 1.7 1.4 121
MONTE CRISTO 8960 .2 .9 22 1.7 1.7 100
SALT RIVER SUMMIT 7760 .0 .0 100 1.2 1.1 109
TRIAL LAKE 9992 .2 1.1 18 1.3 1.6 81
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Basin wide percent of average 21 101
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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.