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 31 , 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 .5 .6 83 2.5 1.9 132
COTTONWOOD CREEK 7670 .5 .8 62 4.3 2.9 148
GRAND TARGHEE 9260 6.0 -M * 5.5 -M *
GRANITE CREEK 6770 .2 .5 40 2.6 1.7 153
GRASSY LAKE 7265 1.1 1.3 85 3.8 3.2 119
GROS VENTRE SUMMIT 8750 2.1 1.3 162 2.3 1.8 128
GUNSIGHT PASS 9820 1.8 -M * 3.0 -M *
LEWIS LAKE DIVIDE 7850 .7 1.1 64 3.7 3.0 123
PHILLIPS BENCH 8200 1.3 1.3 100 3.4 2.3 148
SALT RIVER SUMMIT 7760 .3 .3 100 2.6 1.9 137
SNAKE RIVER STATION 6920 .5 .5 100 3.1 2.2 141
SPRING CREEK DIVIDE 9000 3.4 1.4 243 4.1 2.4 171
THUMB DIVIDE 7980 1.0 .7 143 4.0 2.0 200
TOGWOTEE PASS 9580 4.2 2.4 175 4.3 2.7 159
TWO OCEAN PLATEAU 9240 4.8 2.9 166 3.7 2.9 128
WILLOW CREEK 8380 2.1 1.7 124 5.5 3.6 153
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Basin wide percent of average 135 145
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 3.6 2.5 144 2.8 2.0 140
BLACK BEAR 8170 4.6 2.6 177 5.9 3.3 179
CANYON 7870 1.4 .6 233 2.9 1.7 171
FISHER CREEK 9100 4.6 2.5 184 5.2 3.1 168
MADISON PLATEAU 7750 2.3 1.5 153 5.1 2.4 212
NORTHEAST ENTRANCE 7350 .5 .3 167 2.5 1.5 167
PARKER PEAK 9400 4.5 2.5 180 3.7 2.2 168
SYLVAN LAKE 8420 1.5 1.7 88 3.0 2.5 120
THUMB DIVIDE 7980 1.0 .7 143 4.0 2.0 200
TWO OCEAN PLATEAU 9240 4.8 2.9 166 3.7 2.9 128
WHISKEY CREEK 6800 .2 .7 29 3.3 2.1 157
WHITE MILL 8700 3.7 1.8 206 3.6 2.6 138
WOLVERINE 7650 .7 .5 140 2.2 1.8 122
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Basin wide percent of average 161 159
WIND RIVER
BURROUGHS CREEK 8750 3.0 .9 333 2.9 1.6 181
COLD SPRINGS 9630 2.8 1.0 280 3.0 1.9 158
DEER PARK 9700 4.7 2.1 224 5.8 2.4 242
HOBBS PARK 10100 5.1 2.2 232 4.9 2.0 245
LITTLE WARM 9370 1.9 1.0 190 2.4 1.7 141
SOUTH PASS 9040 4.0 1.5 267 4.9 2.0 245
ST. LAWRENCE ALT 8620 2.1 .9 233 3.8 1.7 224
TOGWOTEE PASS 9580 4.2 2.4 175 4.3 2.7 159
TOWNSEND CREEK 8700 3.4 1.0 340 4.8 2.1 229
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Basin wide percent of average 240 203
BIGHORN BASIN
BALD MTN. 9380 3.9 2.7 144 3.3 2.3 143
BEAR TRAP MEADOW 8200 1.2 .6 200 2.1 1.7 124
BLACKWATER 9780 4.5 3.0 150 3.8 2.6 146
BONE SPRINGS DIV 9350 3.3 2.5 132 3.2 2.4 133
EVENING STAR 9200 4.6 2.5 184 5.5 2.7 204
GRAVE SPRINGS 8550 2.6 1.1 236 3.6 2.1 171
KIRWIN 9550 3.0 1.8 167 2.5 1.8 139
MARQUETTE 8760 2.9 1.9 153 2.4 2.2 109
MIDDLE POWDER 7760 2.8 1.3 215 3.1 2.5 124
OWL CREEK 8975 2.4 .8 300 2.0 1.1 182
POWDER RIVER PASS 9480 2.0 1.2 167 2.4 1.9 126
SHELL CREEK 9580 3.5 2.6 135 2.9 2.0 145
SYLVAN LAKE 8420 1.5 1.7 88 3.0 2.5 120
SYLVAN ROAD 7120 .5 .5 100 2.6 2.0 130
TIMBER CREEK 7950 1.4 1.1 127 2.5 1.6 156
YOUNTS PEAK 8350 2.1 1.3 162 2.2 1.8 122
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Basin wide percent of average 159 142
SHOSHONE RIVER
BLACKWATER 9780 4.5 3.0 150 3.8 2.6 146
EVENING STAR 9200 4.6 2.5 184 5.5 2.7 204
KIRWIN 9550 3.0 1.8 167 2.5 1.8 139
MARQUETTE 8760 2.9 1.9 153 2.4 2.2 109
SYLVAN LAKE 8420 1.5 1.7 88 3.0 2.5 120
SYLVAN ROAD 7120 .5 .5 100 2.6 2.0 130
YOUNTS PEAK 8350 2.1 1.3 162 2.2 1.8 122
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Basin wide percent of average 150 141
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.2 .6 200 2.1 1.7 124
BIG GOOSE 7990 1.8 .8 225 3.2 2.1 152
BONE SPRINGS DIV 9350 3.3 2.5 132 3.2 2.4 133
BURGESS JUNCTION 7880 3.1 1.5 207 3.7 2.2 168
CLOUD PEAK RESERVOIR 9860 3.3 1.5 220 3.3 2.5 132
DOME LAKE 8880 2.3 1.8 128 3.2 2.4 133
GRAVE SPRINGS 8550 2.6 1.1 236 3.6 2.1 171
HANSEN SAWMILL 8360 1.3 .8 162 2.1 1.8 117
MIDDLE POWDER 7760 2.8 1.3 215 3.1 2.5 124
POWDER RIVER PASS 9480 2.0 1.2 167 2.4 1.9 126
SUCKER CREEK 8880 3.5 1.4 250 4.2 2.3 183
TIE CREEK 6870 1.4 .9 156 4.0 2.5 160
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Basin wide percent of average 186 144
BELLE FOURCHE
BLIND PARK 6890 1.5 .5 300 4.0 2.5 160
COLE CANYON 5910 .8 1.0 80 4.1 1.8 228
NORTH RAPID CREEK 6130 1.3 .5 260 3.9 2.5 156
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Basin wide percent of average 180 176
UPPER N. PLATTE RIVER
COLUMBINE 9160 1.3 .7 186 4.1 2.3 178
DIVIDE PEAK 8880 2.6 1.7 153 5.3 2.6 204
ELK RIVER 8700 .4 .6 67 3.2 2.1 152
JOE WRIGHT 10120 4.3 2.4 179 5.0 3.3 152
NORTH FRENCH CREEK 10130 6.9 3.0 230 7.2 3.2 225
OLD BATTLE 10000 7.2 2.8 257 7.6 3.4 224
SAGE CREEK BASIN 7850 1.3 1.0 130 2.8 1.5 187
SOUTH BRUSH CREEK 8440 1.0 .7 143 4.1 2.5 164
TOWER 10500 7.3 3.3 221 7.4 3.8 195
WEBBER SPRINGS 9250 3.5 1.8 194 6.2 2.9 214
WILLOW CREEK PASS 9540 1.0 1.1 91 3.0 1.9 158
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Basin wide percent of average 193 189
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.8 2.1 229 5.6 2.3 243
CASPER MTN. 7900 3.3 1.7 194 3.9 2.4 162
DEADMAN HILL 10220 1.3 2.1 62 4.7 2.4 196
DEER PARK 9700 4.7 2.1 224 5.8 2.4 242
LAPRELE CREEK 8375 1.6 1.0 160 3.6 1.8 200
RENO HILL 8400 3.8 1.7 224 4.9 2.4 204
ROACH 9700 3.5 1.1 318 5.1 2.2 232
SAND LAKE 10050 7.6 3.1 245 7.8 2.9 269
SOUTH PASS 9040 4.0 1.5 267 4.9 2.0 245
WINDY PEAK 7900 1.6 .5 320 3.7 1.6 231
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Basin wide percent of average 214 223
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .5 0 2.1 1.8 117
DIVIDE PEAK 8880 2.6 1.7 153 5.3 2.6 204
OLD BATTLE 10000 7.2 2.8 257 7.6 3.4 224
SANDSTONE RS 8150 -M .5 * 2.5 2.2 114
WHISKEY PARK 8950 2.2 1.6 138 5.9 2.8 211
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Basin wide percent of average 182 183
UPPER GREEN RIVER
BIG SANDY OPENING 9080 3.1 1.2 258 3.3 1.7 194
BLIND BULL SUM 8650 2.6 1.5 173 2.4 2.1 114
EAST RIM DIVIDE 7930 .3 .6 50 2.0 1.3 154
ELKHART PARK G.S. 9400 2.4 .8 300 2.9 1.9 153
GROS VENTRE SUMMIT 8750 2.1 1.3 162 2.3 1.8 128
GUNSIGHT PASS 9820 1.8 -M * 3.0 -M *
KENDALL R.S. 7740 .4 .6 67 2.1 1.5 140
LOOMIS PARK 8240 .5 .9 56 2.5 1.7 147
NEW FORK LAKE 8340 .4 .5 80 2.3 1.5 153
SNIDER BASIN 8060 1.2 .7 171 2.9 1.5 193
SPRING CREEK DIVIDE 9000 3.4 1.4 243 4.1 2.4 171
TRIPLE PEAK 8500 2.7 1.1 245 4.5 2.1 214
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Basin wide percent of average 180 161
LOWER GREEN RIVER
HAMS FORK 7840 .5 .4 125 3.1 1.4 221
HEWINTA 9519 .8 .8 100 2.4 2.3 104
HICKERSON PARK 9145 2.5 .4 625 3.1 1.6 194
HOLE-IN-ROCK 9150 1.8 .5 360 3.3 1.6 206
INDIAN CREEK 9425 4.5 1.4 321 5.0 2.4 208
KELLEY R.S. 8180 1.3 .9 144 3.8 2.1 181
STEEL CREEK PARK 10200 1.1 1.6 69 3.0 2.2 136
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Basin wide percent of average 208 174
UPPER BEAR RIVER
BUG LAKE 7950 .5 1.2 42 3.3 2.3 143
HAYDEN FORK 9212 .7 .8 87 2.8 2.3 122
KELLEY R.S. 8180 1.3 .9 144 3.8 2.1 181
LILY LAKE 9156 .7 1.0 70 2.3 2.3 100
MONTE CRISTO 8960 1.9 1.5 127 4.1 2.7 152
SALT RIVER SUMMIT 7760 .3 .3 100 2.6 1.9 137
TRIAL LAKE 9992 2.4 1.9 126 2.9 2.6 112
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Basin wide percent of average 103 135
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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.