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 TUESDAY: OCTOBER 20 , 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 1.1 164
COTTONWOOD CREEK 7670 .2 .3 67 3.1 1.6 194
GRAND TARGHEE 9260 4.2 -M * 3.7 -M *
GRANITE CREEK 6770 .2 .1 200 1.8 .9 200
GRASSY LAKE 7265 .2 .5 40 2.2 1.8 122
GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.1 164
GUNSIGHT PASS 9820 1.6 -M * 2.6 -M *
LEWIS LAKE DIVIDE 7850 .5 .3 167 2.4 1.6 150
PHILLIPS BENCH 8200 .0 .5 0 2.0 1.2 167
SALT RIVER SUMMIT 7760 .0 .0 100 2.2 1.1 200
SNAKE RIVER STATION 6920 .1 .1 100 1.8 1.3 138
SPRING CREEK DIVIDE 9000 2.9 .6 483 3.4 1.3 262
THUMB DIVIDE 7980 .1 .3 33 3.1 1.2 258
TOGWOTEE PASS 9580 3.2 1.4 229 3.0 1.5 200
TWO OCEAN PLATEAU 9240 3.0 1.6 188 2.3 1.7 135
WILLOW CREEK 8380 1.6 .7 229 4.3 2.1 205
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Basin wide percent of average 189 181
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 2.5 1.6 156 2.0 1.1 182
BLACK BEAR 8170 2.8 1.0 280 4.2 1.8 233
CANYON 7870 .4 .3 133 1.9 .9 211
FISHER CREEK 9100 2.9 1.2 242 3.0 1.8 167
MADISON PLATEAU 7750 1.5 .6 250 3.8 1.4 271
NORTHEAST ENTRANCE 7350 .0 .1 0 1.7 .9 189
PARKER PEAK 9400 2.8 1.7 165 2.0 1.4 143
SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113
THUMB DIVIDE 7980 .1 .3 33 3.1 1.2 258
TWO OCEAN PLATEAU 9240 3.0 1.6 188 2.3 1.7 135
WHISKEY CREEK 6800 .0 .2 0 2.6 1.2 217
WHITE MILL 8700 2.4 .9 267 2.3 1.5 153
WOLVERINE 7650 .0 .2 0 1.3 1.1 118
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Basin wide percent of average 172 182
WIND RIVER
BURROUGHS CREEK 8750 2.4 .4 600 2.2 .9 244
COLD SPRINGS 9630 1.8 .5 360 2.3 1.0 230
DEER PARK 9700 2.8 1.0 280 3.7 1.3 285
HOBBS PARK 10100 3.2 1.3 246 2.9 1.2 242
LITTLE WARM 9370 1.4 .6 233 2.0 1.0 200
SOUTH PASS 9040 2.5 .6 417 3.2 1.1 291
ST. LAWRENCE ALT 8620 1.0 .4 250 2.5 1.0 250
TOGWOTEE PASS 9580 3.2 1.4 229 3.0 1.5 200
TOWNSEND CREEK 8700 2.1 .6 350 2.9 1.3 223
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Basin wide percent of average 300 240
BIGHORN BASIN
BALD MTN. 9380 2.4 1.8 133 2.2 1.5 147
BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.0 170
BLACKWATER 9780 2.9 2.0 145 2.4 1.5 160
BONE SPRINGS DIV 9350 1.6 1.6 100 1.9 1.5 127
EVENING STAR 9200 2.9 1.5 193 3.3 1.5 220
GRAVE SPRINGS 8550 1.5 .7 214 2.3 1.4 164
KIRWIN 9550 2.2 1.1 200 1.8 1.0 180
MARQUETTE 8760 2.3 1.3 177 2.3 1.4 164
MIDDLE POWDER 7760 1.9 .9 211 2.5 1.6 156
OWL CREEK 8975 2.1 .6 350 1.7 .7 243
POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.2 142
SHELL CREEK 9580 2.4 1.8 133 1.8 1.2 150
SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113
SYLVAN ROAD 7120 .0 .2 0 1.3 1.0 130
TIMBER CREEK 7950 .9 .7 129 1.8 .9 200
YOUNTS PEAK 8350 1.0 .7 143 1.6 1.1 145
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Basin wide percent of average 155 160
SHOSHONE RIVER
BLACKWATER 9780 2.9 2.0 145 2.4 1.5 160
EVENING STAR 9200 2.9 1.5 193 3.3 1.5 220
KIRWIN 9550 2.2 1.1 200 1.8 1.0 180
MARQUETTE 8760 2.3 1.3 177 2.3 1.4 164
SYLVAN LAKE 8420 .0 1.0 0 1.7 1.5 113
SYLVAN ROAD 7120 .0 .2 0 1.3 1.0 130
YOUNTS PEAK 8350 1.0 .7 143 1.6 1.1 145
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Basin wide percent of average 145 160
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .7 .4 175 1.7 1.0 170
BIG GOOSE 7990 .6 .5 120 1.9 1.4 136
BONE SPRINGS DIV 9350 1.6 1.6 100 1.9 1.5 127
BURGESS JUNCTION 7880 1.5 .9 167 2.1 1.4 150
CLOUD PEAK RESERVOIR 9860 1.6 .8 200 2.5 1.6 156
DOME LAKE 8880 1.3 1.1 118 2.3 1.5 153
GRAVE SPRINGS 8550 1.5 .7 214 2.3 1.4 164
HANSEN SAWMILL 8360 .8 .4 200 1.7 1.1 155
MIDDLE POWDER 7760 1.9 .9 211 2.5 1.6 156
POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.2 142
SUCKER CREEK 8880 1.6 .8 200 2.0 1.5 133
TIE CREEK 6870 .0 .4 0 2.4 1.6 150
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Basin wide percent of average 159 149
BELLE FOURCHE
BLIND PARK 6890 .0 .2 0 2.2 1.5 147
COLE CANYON 5910 .0 .4 0 3.1 1.1 282
NORTH RAPID CREEK 6130 .0 .2 0 2.1 1.5 140
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Basin wide percent of average 0 180
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .1 100 2.6 1.2 217
DIVIDE PEAK 8880 .1 .9 11 2.7 1.6 169
ELK RIVER 8700 .1 .2 50 2.1 1.3 162
JOE WRIGHT 10120 .9 1.2 75 2.3 2.0 115
NORTH FRENCH CREEK 10130 5.0 1.8 278 5.2 1.8 289
OLD BATTLE 10000 4.9 1.5 327 5.4 1.9 284
SAGE CREEK BASIN 7850 .0 .5 0 2.0 .9 222
SOUTH BRUSH CREEK 8440 .1 .3 33 3.1 1.5 207
TOWER 10500 5.2 1.4 371 5.5 2.0 275
WEBBER SPRINGS 9250 1.6 .8 200 4.0 1.7 235
WILLOW CREEK PASS 9540 .3 .5 60 1.4 1.1 127
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Basin wide percent of average 199 214
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.6 1.1 327 -M 1.3 *
CASPER MTN. 7900 .1 .9 11 2.1 1.4 150
DEADMAN HILL 10220 .3 1.2 25 2.6 1.4 186
DEER PARK 9700 2.8 1.0 280 3.7 1.3 285
LAPRELE CREEK 8375 .0 .4 0 1.9 1.0 190
RENO HILL 8400 .5 1.0 50 2.1 1.4 150
ROACH 9700 1.4 .4 350 2.8 1.3 215
SAND LAKE 10050 4.9 1.7 288 4.9 1.7 288
SOUTH PASS 9040 2.5 .6 417 3.2 1.1 291
WINDY PEAK 7900 .3 .2 150 2.1 1.0 210
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Basin wide percent of average 193 219
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .1 100 1.2 1.0 120
DIVIDE PEAK 8880 .1 .9 11 2.7 1.6 169
OLD BATTLE 10000 4.9 1.5 327 5.4 1.9 284
SANDSTONE RS 8150 -M .2 * 1.4 1.3 108
WHISKEY PARK 8950 1.1 .8 138 4.0 1.7 235
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Basin wide percent of average 188 196
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.8 .6 467 2.9 1.0 290
BLIND BULL SUM 8650 2.0 .6 333 1.9 1.2 158
EAST RIM DIVIDE 7930 .1 .2 50 1.8 .8 225
ELKHART PARK G.S. 9400 2.1 .3 700 2.3 1.1 209
GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.1 164
GUNSIGHT PASS 9820 1.6 -M * 2.6 -M *
KENDALL R.S. 7740 .2 .1 200 1.9 .9 211
LOOMIS PARK 8240 .3 .3 100 1.9 1.0 190
NEW FORK LAKE 8340 .0 .1 0 1.7 .9 189
SNIDER BASIN 8060 1.0 .3 333 2.4 .8 300
SPRING CREEK DIVIDE 9000 2.9 .6 483 3.4 1.3 262
TRIPLE PEAK 8500 1.9 .4 475 3.5 1.2 292
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Basin wide percent of average 360 226
LOWER GREEN RIVER
HAMS FORK 7840 .5 .1 500 2.5 .8 312
HEWINTA 9519 .0 .5 0 1.0 1.4 71
HICKERSON PARK 9145 .1 .1 100 .9 1.0 90
HOLE-IN-ROCK 9150 .0 .1 0 1.0 1.0 100
INDIAN CREEK 9425 4.2 .6 700 4.3 1.3 331
KELLEY R.S. 8180 1.2 .3 400 3.2 1.1 291
STEEL CREEK PARK 10200 1.0 .9 111 1.1 1.3 85
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Basin wide percent of average 269 177
UPPER BEAR RIVER
BUG LAKE 7950 .4 .6 67 2.4 1.3 185
HAYDEN FORK 9212 .1 .5 20 1.9 1.4 136
KELLEY R.S. 8180 1.2 .3 400 3.2 1.1 291
LILY LAKE 9156 .2 .6 33 1.1 1.4 79
MONTE CRISTO 8960 .9 .9 100 2.4 1.6 150
SALT RIVER SUMMIT 7760 .0 .0 100 2.2 1.1 200
TRIAL LAKE 9992 2.0 1.0 200 2.4 1.5 160
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Basin wide percent of average 123 166
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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.