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 18 , 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 .1 0 1.5 1.0 150
COTTONWOOD CREEK 7670 .0 .2 0 1.4 1.5 93
GRAND TARGHEE 9260 1.1 -M * 3.2 -M *
GRANITE CREEK 6770 .2 .1 200 1.6 .9 178
GRASSY LAKE 7265 .4 .4 100 2.0 1.7 118
GROS VENTRE SUMMIT 8750 1.3 .7 186 1.8 1.0 180
GUNSIGHT PASS 9820 .7 -M * 1.1 -M *
LEWIS LAKE DIVIDE 7850 .2 .2 100 2.0 1.5 133
PHILLIPS BENCH 8200 .9 .4 225 1.6 1.2 133
SALT RIVER SUMMIT 7760 .0 .0 100 1.2 1.0 120
SNAKE RIVER STATION 6920 .0 .1 0 1.3 1.2 108
SPRING CREEK DIVIDE 9000 .7 .5 140 1.2 1.2 100
THUMB DIVIDE 7980 .3 .2 150 2.2 1.1 200
TOGWOTEE PASS 9580 1.5 1.3 115 2.0 1.4 143
TWO OCEAN PLATEAU 9240 1.5 1.5 100 1.6 1.6 100
WILLOW CREEK 8380 .2 .6 33 2.0 2.0 100
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Basin wide percent of average 114 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 1.3 1.6 81 1.3 1.1 118
BLACK BEAR 8170 1.2 1.0 120 3.2 1.7 188
CANYON 7870 .5 .3 167 .7 .9 78
FISHER CREEK 9100 1.1 1.1 100 2.0 1.6 125
MADISON PLATEAU 7750 .7 .5 140 1.8 1.4 129
NORTHEAST ENTRANCE 7350 .1 .1 100 1.0 .9 111
PARKER PEAK 9400 1.5 1.6 94 1.4 1.3 108
SYLVAN LAKE 8420 .3 1.0 30 1.6 1.4 114
THUMB DIVIDE 7980 .3 .2 150 2.2 1.1 200
TWO OCEAN PLATEAU 9240 1.5 1.5 100 1.6 1.6 100
WHISKEY CREEK 6800 .4 .2 200 1.3 1.1 118
WHITE MILL 8700 1.1 .8 138 1.4 1.4 100
WOLVERINE 7650 .2 .2 100 1.1 1.1 100
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Basin wide percent of average 101 124
WIND RIVER
BURROUGHS CREEK 8750 1.7 .4 425 2.0 .9 222
COLD SPRINGS 9630 1.6 .4 400 2.2 1.0 220
DEER PARK 9700 1.3 1.0 130 2.5 1.2 208
HOBBS PARK 10100 2.1 1.2 175 2.5 1.2 208
LITTLE WARM 9370 1.3 .5 260 1.7 .9 189
SOUTH PASS 9040 1.5 .6 250 2.7 1.0 270
ST. LAWRENCE ALT 8620 1.8 .4 450 2.2 .9 244
TOGWOTEE PASS 9580 1.5 1.3 115 2.0 1.4 143
TOWNSEND CREEK 8700 1.9 .6 317 2.6 1.2 217
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Basin wide percent of average 230 210
BIGHORN BASIN
BALD MTN. 9380 1.8 1.7 106 2.5 1.4 179
BEAR TRAP MEADOW 8200 .9 .4 225 1.7 1.0 170
BLACKWATER 9780 1.5 1.9 79 1.8 1.4 129
BONE SPRINGS DIV 9350 1.5 1.5 100 1.8 1.5 120
EVENING STAR 9200 1.5 1.5 100 2.2 1.4 157
GRAVE SPRINGS 8550 1.1 .7 157 1.7 1.3 131
KIRWIN 9550 1.5 1.0 150 1.5 .9 167
MARQUETTE 8760 1.8 1.3 138 2.0 1.3 154
MIDDLE POWDER 7760 1.1 .9 122 1.7 1.5 113
OWL CREEK 8975 1.9 .5 380 1.8 .7 257
POWDER RIVER PASS 9480 .9 .7 129 1.7 1.1 155
SHELL CREEK 9580 2.1 1.8 117 2.4 1.1 218
SYLVAN LAKE 8420 .3 1.0 30 1.6 1.4 114
SYLVAN ROAD 7120 .2 .2 100 1.1 .9 122
TIMBER CREEK 7950 1.3 .6 217 2.0 .9 222
YOUNTS PEAK 8350 1.0 .6 167 1.3 1.0 130
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Basin wide percent of average 125 153
SHOSHONE RIVER
BLACKWATER 9780 1.5 1.9 79 1.8 1.4 129
EVENING STAR 9200 1.5 1.5 100 2.2 1.4 157
KIRWIN 9550 1.5 1.0 150 1.5 .9 167
MARQUETTE 8760 1.8 1.3 138 2.0 1.3 154
SYLVAN LAKE 8420 .3 1.0 30 1.6 1.4 114
SYLVAN ROAD 7120 .2 .2 100 1.1 .9 122
YOUNTS PEAK 8350 1.0 .6 167 1.3 1.0 130
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Basin wide percent of average 104 139
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .9 .4 225 1.7 1.0 170
BIG GOOSE 7990 .8 .4 200 1.7 1.3 131
BONE SPRINGS DIV 9350 1.5 1.5 100 1.8 1.5 120
BURGESS JUNCTION 7880 1.0 .9 111 1.8 1.3 138
CLOUD PEAK RESERVOIR 9860 1.2 .8 150 1.8 1.5 120
DOME LAKE 8880 1.0 1.0 100 1.6 1.4 114
GRAVE SPRINGS 8550 1.1 .7 157 1.7 1.3 131
HANSEN SAWMILL 8360 1.0 .4 250 1.5 1.0 150
MIDDLE POWDER 7760 1.1 .9 122 1.7 1.5 113
POWDER RIVER PASS 9480 .9 .7 129 1.7 1.1 155
SUCKER CREEK 8880 1.2 .8 150 2.2 1.4 157
TIE CREEK 6870 1.3 .5 260 2.9 1.5 193
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Basin wide percent of average 144 140
BELLE FOURCHE
BLIND PARK 6890 .1 .2 50 1.1 1.4 79
COLE CANYON 5910 .8 .4 200 2.5 1.0 250
NORTH RAPID CREEK 6130 .2 .2 100 1.6 1.4 114
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Basin wide percent of average 138 137
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .1 0 .3 1.2 25
DIVIDE PEAK 8880 .3 .9 33 2.0 1.5 133
ELK RIVER 8700 .1 .2 50 1.0 1.2 83
JOE WRIGHT 10120 .0 1.1 0 .8 1.8 44
NORTH FRENCH CREEK 10130 .7 1.6 44 1.2 1.7 71
OLD BATTLE 10000 .3 1.4 21 1.4 1.8 78
SAGE CREEK BASIN 7850 .0 .5 0 .8 .8 100
SOUTH BRUSH CREEK 8440 .0 .2 0 .8 1.4 57
TOWER 10500 .0 1.3 0 1.7 1.9 89
WEBBER SPRINGS 9250 .1 .7 14 .9 1.6 56
WILLOW CREEK PASS 9540 .0 .5 0 .6 1.1 55
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Basin wide percent of average 18 72
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .3 1.1 27 .6 1.2 50
CASPER MTN. 7900 .5 .8 62 1.6 1.3 123
DEADMAN HILL 10220 1.8 1.1 164 .5 1.3 38
DEER PARK 9700 1.3 1.0 130 2.5 1.2 208
LAPRELE CREEK 8375 .1 .4 25 .6 1.0 60
RENO HILL 8400 1.1 .9 122 1.3 1.3 100
ROACH 9700 .6 .4 150 .7 1.2 58
SAND LAKE 10050 1.0 1.6 62 .9 1.6 56
SOUTH PASS 9040 1.5 .6 250 2.7 1.0 270
WINDY PEAK 7900 .6 .2 300 .8 .9 89
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Basin wide percent of average 109 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 .6 1.0 60
DIVIDE PEAK 8880 .3 .9 33 2.0 1.5 133
OLD BATTLE 10000 .3 1.4 21 1.4 1.8 78
SANDSTONE RS 8150 .0 .1 0 .6 1.2 50
WHISKEY PARK 8950 .1 .7 14 1.0 1.6 62
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Basin wide percent of average 23 79
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .8 .5 160 1.4 1.0 140
BLIND BULL SUM 8650 1.4 .6 233 2.0 1.1 182
EAST RIM DIVIDE 7930 .5 .1 500 1.8 .7 257
ELKHART PARK G.S. 9400 .9 .3 300 1.8 1.1 164
GROS VENTRE SUMMIT 8750 1.3 .7 186 1.8 1.0 180
GUNSIGHT PASS 9820 .7 -M * 1.1 -M *
KENDALL R.S. 7740 .5 .1 500 1.4 .8 175
LOOMIS PARK 8240 .9 .3 300 2.0 .9 222
NEW FORK LAKE 8340 .5 .1 500 1.4 .8 175
SNIDER BASIN 8060 .6 .2 300 1.0 .7 143
SPRING CREEK DIVIDE 9000 .7 .5 140 1.2 1.2 100
TRIPLE PEAK 8500 1.1 .4 275 1.7 1.1 155
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Basin wide percent of average 242 168
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 1.2 .7 171
HEWINTA 9519 .0 .5 0 1.2 1.3 92
HICKERSON PARK 9145 .0 .1 0 1.1 .9 122
HOLE-IN-ROCK 9150 .4 .1 400 1.7 1.0 170
INDIAN CREEK 9425 1.4 .5 280 1.7 1.2 142
KELLEY R.S. 8180 .5 .3 167 1.3 1.1 118
STEEL CREEK PARK 10200 .8 .9 89 1.6 1.2 133
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Basin wide percent of average 129 132
UPPER BEAR RIVER
BUG LAKE 7950 .1 .6 17 1.3 1.3 100
HAYDEN FORK 9212 .0 .4 0 1.3 1.3 100
KELLEY R.S. 8180 .5 .3 167 1.3 1.1 118
LILY LAKE 9156 .0 .5 0 1.7 1.3 131
MONTE CRISTO 8960 .0 .8 0 1.6 1.5 107
SALT RIVER SUMMIT 7760 .0 .0 100 1.2 1.0 120
TRIAL LAKE 9992 .2 1.0 20 1.3 1.4 93
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Basin wide percent of average 22 109
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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.