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 FRIDAY: OCTOBER 30 , 2009
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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 .3 .5 60 2.5 1.9 132
COTTONWOOD CREEK 7670 .4 .8 50 4.3 2.8 154
GRAND TARGHEE 9260 5.9 -M * 5.2 -M *
GRANITE CREEK 6770 .2 .4 50 2.5 1.6 156
GRASSY LAKE 7265 .9 1.2 75 3.5 3.0 117
GROS VENTRE SUMMIT 8750 2.0 1.3 154 2.3 1.7 135
GUNSIGHT PASS 9820 1.5 -M * 2.9 -M *
LEWIS LAKE DIVIDE 7850 -M 1.0 * -M 2.8 *
PHILLIPS BENCH 8200 1.1 1.2 92 3.2 2.1 152
SALT RIVER SUMMIT 7760 .2 .3 67 2.4 1.8 133
SNAKE RIVER STATION 6920 .4 .5 80 3.0 2.1 143
SPRING CREEK DIVIDE 9000 3.1 1.3 238 3.9 2.3 170
THUMB DIVIDE 7980 .7 .7 100 3.9 1.9 205
TOGWOTEE PASS 9580 4.0 2.3 174 4.1 2.6 158
TWO OCEAN PLATEAU 9240 4.5 2.8 161 3.4 2.8 121
WILLOW CREEK 8380 2.0 1.6 125 5.4 3.4 159
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Basin wide percent of average 133 148
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 3.4 2.5 136 2.6 1.9 137
BLACK BEAR 8170 4.3 2.5 172 5.7 3.1 184
CANYON 7870 1.3 .6 217 2.8 1.7 165
FISHER CREEK 9100 4.4 2.4 183 4.8 3.0 160
MADISON PLATEAU 7750 2.1 1.5 140 4.8 2.3 209
NORTHEAST ENTRANCE 7350 .2 .2 100 2.4 1.4 171
PARKER PEAK 9400 4.1 2.4 171 3.3 2.2 150
SYLVAN LAKE 8420 1.2 1.7 71 2.9 2.4 121
THUMB DIVIDE 7980 .7 .7 100 3.9 1.9 205
TWO OCEAN PLATEAU 9240 4.5 2.8 161 3.4 2.8 121
WHISKEY CREEK 6800 .0 .7 0 3.2 2.0 160
WHITE MILL 8700 3.6 1.7 212 3.3 2.5 132
WOLVERINE 7650 .8 .4 200 2.2 1.7 129
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Basin wide percent of average 152 157
WIND RIVER
BURROUGHS CREEK 8750 2.9 .8 362 2.7 1.5 180
COLD SPRINGS 9630 2.6 1.0 260 2.9 1.8 161
DEER PARK 9700 4.6 1.9 242 5.6 2.3 243
HOBBS PARK 10100 5.0 2.1 238 4.7 2.0 235
LITTLE WARM 9370 1.7 .9 189 2.3 1.6 144
SOUTH PASS 9040 3.9 1.4 279 4.7 1.9 247
ST. LAWRENCE ALT 8620 1.9 .9 211 3.7 1.6 231
TOGWOTEE PASS 9580 4.0 2.3 174 4.1 2.6 158
TOWNSEND CREEK 8700 3.2 1.1 291 4.8 2.0 240
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Basin wide percent of average 240 205
BIGHORN BASIN
BALD MTN. 9380 3.7 2.6 142 3.1 2.2 141
BEAR TRAP MEADOW 8200 1.0 .5 200 2.0 1.6 125
BLACKWATER 9780 4.3 2.9 148 3.6 2.5 144
BONE SPRINGS DIV 9350 3.1 2.4 129 2.9 2.3 126
EVENING STAR 9200 4.4 2.4 183 5.2 2.5 208
GRAVE SPRINGS 8550 2.4 1.1 218 3.5 2.0 175
KIRWIN 9550 2.9 1.8 161 2.4 1.7 141
MARQUETTE 8760 2.8 1.9 147 2.7 2.2 123
MIDDLE POWDER 7760 2.5 1.3 192 2.7 2.4 113
OWL CREEK 8975 2.2 .8 275 1.9 1.1 173
POWDER RIVER PASS 9480 2.0 1.1 182 2.2 1.8 122
SHELL CREEK 9580 3.1 2.6 119 2.8 1.9 147
SYLVAN LAKE 8420 1.2 1.7 71 2.9 2.4 121
SYLVAN ROAD 7120 .5 .4 125 2.5 1.9 132
TIMBER CREEK 7950 1.1 1.1 100 2.4 1.5 160
YOUNTS PEAK 8350 1.9 1.3 146 2.1 1.7 124
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Basin wide percent of average 151 142
SHOSHONE RIVER
BLACKWATER 9780 4.3 2.9 148 3.6 2.5 144
EVENING STAR 9200 4.4 2.4 183 5.2 2.5 208
KIRWIN 9550 2.9 1.8 161 2.4 1.7 141
MARQUETTE 8760 2.8 1.9 147 2.7 2.2 123
SYLVAN LAKE 8420 1.2 1.7 71 2.9 2.4 121
SYLVAN ROAD 7120 .5 .4 125 2.5 1.9 132
YOUNTS PEAK 8350 1.9 1.3 146 2.1 1.7 124
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Basin wide percent of average 145 144
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.0 .5 200 2.0 1.6 125
BIG GOOSE 7990 1.5 .8 188 2.9 2.0 145
BONE SPRINGS DIV 9350 3.1 2.4 129 2.9 2.3 126
BURGESS JUNCTION 7880 2.9 1.5 193 3.4 2.1 162
CLOUD PEAK RESERVOIR 9860 2.9 1.5 193 2.8 2.5 112
DOME LAKE 8880 2.0 1.8 111 3.0 2.3 130
GRAVE SPRINGS 8550 2.4 1.1 218 3.5 2.0 175
HANSEN SAWMILL 8360 1.1 .8 138 1.9 1.7 112
MIDDLE POWDER 7760 2.5 1.3 192 2.7 2.4 113
POWDER RIVER PASS 9480 2.0 1.1 182 2.2 1.8 122
SUCKER CREEK 8880 3.3 1.4 236 3.7 2.3 161
TIE CREEK 6870 1.2 .8 150 3.8 2.4 158
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Basin wide percent of average 173 137
BELLE FOURCHE
BLIND PARK 6890 .8 .4 200 3.6 2.4 150
COLE CANYON 5910 .6 .8 75 3.9 1.7 229
NORTH RAPID CREEK 6130 1.1 .4 275 3.5 2.3 152
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Basin wide percent of average 156 172
UPPER N. PLATTE RIVER
COLUMBINE 9160 .9 .6 150 3.6 2.2 164
DIVIDE PEAK 8880 2.3 1.6 144 5.0 2.5 200
ELK RIVER 8700 .1 .5 20 3.0 2.0 150
JOE WRIGHT 10120 3.9 2.3 170 4.6 3.2 144
NORTH FRENCH CREEK 10130 6.8 2.9 234 7.1 3.1 229
OLD BATTLE 10000 6.8 2.7 252 7.1 3.3 215
SAGE CREEK BASIN 7850 1.0 .9 111 2.7 1.5 180
SOUTH BRUSH CREEK 8440 .8 .6 133 3.8 2.5 152
TOWER 10500 6.9 3.1 223 6.9 3.6 192
WEBBER SPRINGS 9250 3.3 1.6 206 6.0 2.8 214
WILLOW CREEK PASS 9540 .9 1.0 90 2.6 1.9 137
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Basin wide percent of average 189 183
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.5 2.0 225 5.5 2.2 250
CASPER MTN. 7900 3.0 1.6 188 3.7 2.3 161
DEADMAN HILL 10220 1.2 2.0 60 4.5 2.3 196
DEER PARK 9700 4.6 1.9 242 5.6 2.3 243
LAPRELE CREEK 8375 1.4 .9 156 3.4 1.7 200
RENO HILL 8400 3.6 1.6 225 4.6 2.3 200
ROACH 9700 3.4 1.0 340 4.9 2.2 223
SAND LAKE 10050 7.3 3.0 243 7.4 2.8 264
SOUTH PASS 9040 3.9 1.4 279 4.7 1.9 247
WINDY PEAK 7900 1.5 .5 300 3.6 1.6 225
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Basin wide percent of average 216 222
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .5 * 1.8 1.8 100
DIVIDE PEAK 8880 2.3 1.6 144 5.0 2.5 200
OLD BATTLE 10000 6.8 2.7 252 7.1 3.3 215
SANDSTONE RS 8150 .0 .4 0 2.2 2.2 100
WHISKEY PARK 8950 2.0 1.5 133 5.6 2.7 207
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Basin wide percent of average 179 174
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.8 1.1 255 3.1 1.7 182
BLIND BULL SUM 8650 2.4 1.4 171 2.3 2.0 115
EAST RIM DIVIDE 7930 .2 .5 40 1.9 1.3 146
ELKHART PARK G.S. 9400 2.1 .8 262 2.7 1.8 150
GROS VENTRE SUMMIT 8750 2.0 1.3 154 2.3 1.7 135
GUNSIGHT PASS 9820 1.5 -M * 2.9 -M *
KENDALL R.S. 7740 .2 .6 33 2.0 1.4 143
LOOMIS PARK 8240 .3 .8 37 2.4 1.7 141
NEW FORK LAKE 8340 .2 .5 40 1.6 1.4 114
SNIDER BASIN 8060 1.0 .6 167 2.7 1.4 193
SPRING CREEK DIVIDE 9000 3.1 1.3 238 3.9 2.3 170
TRIPLE PEAK 8500 2.9 1.0 290 4.3 2.0 215
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Basin wide percent of average 174 156
LOWER GREEN RIVER
HAMS FORK 7840 .4 .4 100 3.0 1.3 231
HEWINTA 9519 .7 .8 87 2.3 2.2 105
HICKERSON PARK 9145 2.3 .4 575 3.1 1.6 194
HOLE-IN-ROCK 9150 1.8 .4 450 3.3 1.6 206
INDIAN CREEK 9425 4.3 1.3 331 4.5 2.3 196
KELLEY R.S. 8180 -M .8 * -M 2.0 *
STEEL CREEK PARK 10200 .8 1.5 53 3.0 2.1 143
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Basin wide percent of average 215 173
UPPER BEAR RIVER
BUG LAKE 7950 .3 1.1 27 3.2 2.2 145
HAYDEN FORK 9212 .7 .8 87 2.8 2.2 127
KELLEY R.S. 8180 -M .8 * -M 2.0 *
LILY LAKE 9156 .6 .9 67 2.2 2.2 100
MONTE CRISTO 8960 1.8 1.4 129 3.8 2.6 146
SALT RIVER SUMMIT 7760 .2 .3 67 2.4 1.8 133
TRIAL LAKE 9992 2.3 1.8 128 2.8 2.5 112
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Basin wide percent of average 94 127
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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.