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 23 , 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 .0 .2 0 1.8 1.3 138
COTTONWOOD CREEK 7670 .0 .4 0 3.2 1.9 168
GRAND TARGHEE 9260 4.2 -M * 3.9 -M *
GRANITE CREEK 6770 .1 .2 50 1.8 1.1 164
GRASSY LAKE 7265 .2 .7 29 2.4 2.1 114
GROS VENTRE SUMMIT 8750 1.7 .9 189 1.9 1.3 146
GUNSIGHT PASS 9820 1.5 -M * 2.7 -M *
LEWIS LAKE DIVIDE 7850 -M .4 * -M 1.9 *
PHILLIPS BENCH 8200 .1 .7 14 2.0 1.5 133
SALT RIVER SUMMIT 7760 .0 .1 0 2.2 1.3 169
SNAKE RIVER STATION 6920 .1 .2 50 2.0 1.5 133
SPRING CREEK DIVIDE 9000 2.8 .8 350 3.4 1.5 227
THUMB DIVIDE 7980 .0 .4 0 3.1 1.4 221
TOGWOTEE PASS 9580 3.1 1.6 194 3.0 1.8 167
TWO OCEAN PLATEAU 9240 3.0 1.9 158 2.4 2.0 120
WILLOW CREEK 8380 1.3 .9 144 4.3 2.5 172
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Basin wide percent of average 138 158
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 2.5 1.8 139 2.0 1.4 143
BLACK BEAR 8170 3.0 1.2 250 4.3 2.1 205
CANYON 7870 .7 .3 233 2.0 1.1 182
FISHER CREEK 9100 2.9 1.5 193 3.1 2.1 148
MADISON PLATEAU 7750 1.3 .7 186 4.0 1.7 235
NORTHEAST ENTRANCE 7350 .0 .1 0 1.8 1.0 180
PARKER PEAK 9400 2.9 1.9 153 2.2 1.6 138
SYLVAN LAKE 8420 .2 1.1 18 1.9 1.7 112
THUMB DIVIDE 7980 .0 .4 0 3.1 1.4 221
TWO OCEAN PLATEAU 9240 3.0 1.9 158 2.4 2.0 120
WHISKEY CREEK 6800 .1 .2 50 2.6 1.4 186
WHITE MILL 8700 2.5 1.1 227 2.3 1.8 128
WOLVERINE 7650 .2 .2 100 1.3 1.3 100
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Basin wide percent of average 156 160
WIND RIVER
BURROUGHS CREEK 8750 2.3 .5 460 2.2 1.1 200
COLD SPRINGS 9630 2.5 .6 417 2.7 1.2 225
DEER PARK 9700 2.8 1.1 255 3.7 1.7 218
HOBBS PARK 10100 3.3 1.5 220 3.1 1.5 207
LITTLE WARM 9370 1.5 .7 214 2.1 1.2 175
SOUTH PASS 9040 2.4 .8 300 3.3 1.3 254
ST. LAWRENCE ALT 8620 1.2 .5 240 2.9 1.2 242
TOGWOTEE PASS 9580 3.1 1.6 194 3.0 1.8 167
TOWNSEND CREEK 8700 2.1 .6 350 3.1 1.5 207
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Basin wide percent of average 268 209
BIGHORN BASIN
BALD MTN. 9380 2.4 2.0 120 2.1 1.7 124
BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.2 142
BLACKWATER 9780 3.1 2.2 141 2.6 1.8 144
BONE SPRINGS DIV 9350 1.6 1.9 84 1.8 1.8 100
EVENING STAR 9200 3.0 1.6 188 3.4 1.8 189
GRAVE SPRINGS 8550 1.5 .7 214 2.5 1.5 167
KIRWIN 9550 2.3 1.3 177 2.0 1.2 167
MARQUETTE 8760 2.3 1.4 164 2.3 1.6 144
MIDDLE POWDER 7760 1.8 1.0 180 2.5 1.8 139
OWL CREEK 8975 2.2 .6 367 1.8 .8 225
POWDER RIVER PASS 9480 1.6 .8 200 1.8 1.4 129
SHELL CREEK 9580 2.4 2.0 120 2.0 1.4 143
SYLVAN LAKE 8420 .2 1.1 18 1.9 1.7 112
SYLVAN ROAD 7120 .0 .2 0 1.4 1.2 117
TIMBER CREEK 7950 1.0 .6 167 2.0 1.1 182
YOUNTS PEAK 8350 1.2 .9 133 1.6 1.3 123
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Basin wide percent of average 146 143
SHOSHONE RIVER
BLACKWATER 9780 3.1 2.2 141 2.6 1.8 144
EVENING STAR 9200 3.0 1.6 188 3.4 1.8 189
KIRWIN 9550 2.3 1.3 177 2.0 1.2 167
MARQUETTE 8760 2.3 1.4 164 2.3 1.6 144
SYLVAN LAKE 8420 .2 1.1 18 1.9 1.7 112
SYLVAN ROAD 7120 .0 .2 0 1.4 1.2 117
YOUNTS PEAK 8350 1.2 .9 133 1.6 1.3 123
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Basin wide percent of average 139 143
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.2 142
BIG GOOSE 7990 .5 .5 100 1.9 1.6 119
BONE SPRINGS DIV 9350 1.6 1.9 84 1.8 1.8 100
BURGESS JUNCTION 7880 1.6 1.0 160 2.1 1.6 131
CLOUD PEAK RESERVOIR 9860 2.1 1.0 210 2.2 1.9 116
DOME LAKE 8880 1.3 1.2 108 2.2 1.8 122
GRAVE SPRINGS 8550 1.5 .7 214 2.5 1.5 167
HANSEN SAWMILL 8360 1.1 .4 275 1.9 1.3 146
MIDDLE POWDER 7760 1.8 1.0 180 2.5 1.8 139
POWDER RIVER PASS 9480 1.6 .8 200 1.8 1.4 129
SUCKER CREEK 8880 1.8 .8 225 2.3 1.7 135
TIE CREEK 6870 .0 .3 0 2.5 1.9 132
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Basin wide percent of average 156 130
BELLE FOURCHE
BLIND PARK 6890 .0 .1 0 2.4 1.8 133
COLE CANYON 5910 .0 .6 0 2.8 1.3 215
NORTH RAPID CREEK 6130 .0 .3 0 2.4 1.8 133
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Basin wide percent of average 0 155
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .2 0 2.6 1.5 173
DIVIDE PEAK 8880 .2 1.1 18 3.0 1.9 158
ELK RIVER 8700 .1 .3 33 2.2 1.5 147
JOE WRIGHT 10120 2.5 1.5 167 2.4 2.3 104
NORTH FRENCH CREEK 10130 5.1 2.1 243 5.5 2.2 250
OLD BATTLE 10000 5.1 1.8 283 5.5 2.3 239
SAGE CREEK BASIN 7850 .1 .6 17 2.1 1.1 191
SOUTH BRUSH CREEK 8440 .0 .3 0 3.2 1.8 178
TOWER 10500 4.8 1.8 267 5.3 2.5 212
WEBBER SPRINGS 9250 1.5 1.0 150 4.1 2.0 205
WILLOW CREEK PASS 9540 .2 .6 33 1.6 1.4 114
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Basin wide percent of average 173 183
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.4 1.4 243 4.1 1.6 256
CASPER MTN. 7900 .0 1.1 0 2.2 1.7 129
DEADMAN HILL 10220 .1 1.4 7 2.8 1.7 165
DEER PARK 9700 2.8 1.1 255 3.7 1.7 218
LAPRELE CREEK 8375 .1 .5 20 2.0 1.3 154
RENO HILL 8400 .6 1.1 55 2.0 1.7 118
ROACH 9700 1.4 .6 233 3.0 1.6 188
SAND LAKE 10050 4.8 2.0 240 5.1 2.0 255
SOUTH PASS 9040 2.4 .8 300 3.3 1.3 254
WINDY PEAK 7900 .4 .2 200 2.2 1.2 183
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Basin wide percent of average 157 192
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .2 0 1.3 1.3 100
DIVIDE PEAK 8880 .2 1.1 18 3.0 1.9 158
OLD BATTLE 10000 5.1 1.8 283 5.5 2.3 239
SANDSTONE RS 8150 -M .2 * 1.6 1.6 100
WHISKEY PARK 8950 1.0 .9 111 4.2 2.0 210
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Basin wide percent of average 158 171
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.7 .7 386 3.0 1.2 250
BLIND BULL SUM 8650 2.0 .8 250 1.9 1.4 136
EAST RIM DIVIDE 7930 .1 .2 50 1.8 .9 200
ELKHART PARK G.S. 9400 2.2 .5 440 2.6 1.3 200
GROS VENTRE SUMMIT 8750 1.7 .9 189 1.9 1.3 146
GUNSIGHT PASS 9820 1.5 -M * 2.7 -M *
KENDALL R.S. 7740 .1 .3 33 1.9 1.0 190
LOOMIS PARK 8240 .1 .5 20 2.0 1.2 167
NEW FORK LAKE 8340 .0 .2 0 1.4 1.0 140
SNIDER BASIN 8060 .8 .3 267 2.4 1.0 240
SPRING CREEK DIVIDE 9000 2.8 .8 350 3.4 1.5 227
TRIPLE PEAK 8500 1.9 .5 380 3.5 1.4 250
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Basin wide percent of average 253 195
LOWER GREEN RIVER
HAMS FORK 7840 .2 .1 200 2.8 .9 311
HEWINTA 9519 .0 .6 0 1.2 1.6 75
HICKERSON PARK 9145 .0 .2 0 1.1 1.2 92
HOLE-IN-ROCK 9150 .0 .2 0 1.5 1.2 125
INDIAN CREEK 9425 4.1 .8 512 4.4 1.6 275
KELLEY R.S. 8180 1.0 .5 200 3.2 1.4 229
STEEL CREEK PARK 10200 1.3 1.1 118 1.3 1.6 81
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Basin wide percent of average 189 163
UPPER BEAR RIVER
BUG LAKE 7950 .1 .8 12 2.6 1.6 162
HAYDEN FORK 9212 .1 .5 20 2.0 1.6 125
KELLEY R.S. 8180 1.0 .5 200 3.2 1.4 229
LILY LAKE 9156 .0 .6 0 1.3 1.6 81
MONTE CRISTO 8960 1.1 1.0 110 3.1 1.9 163
SALT RIVER SUMMIT 7760 .0 .1 0 2.2 1.3 169
TRIAL LAKE 9992 1.9 1.2 158 2.4 1.8 133
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Basin wide percent of average 89 150
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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.