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 MONDAY: OCTOBER 19 , 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 .1 0 1.6 1.0 160
COTTONWOOD CREEK 7670 .4 .2 200 3.0 1.5 200
GRAND TARGHEE 9260 4.0 -M * 3.5 -M *
GRANITE CREEK 6770 .2 .1 200 1.6 .9 178
GRASSY LAKE 7265 .2 .4 50 2.0 1.7 118
GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.0 180
GUNSIGHT PASS 9820 1.7 -M * 2.6 -M *
LEWIS LAKE DIVIDE 7850 .5 .2 250 2.3 1.5 153
PHILLIPS BENCH 8200 .3 .4 75 1.9 1.2 158
SALT RIVER SUMMIT 7760 .2 .0 2.1 1.0 210
SNAKE RIVER STATION 6920 .1 .1 100 1.6 1.2 133
SPRING CREEK DIVIDE 9000 2.9 .5 580 3.4 1.2 283
THUMB DIVIDE 7980 .2 .2 100 3.0 1.1 273
TOGWOTEE PASS 9580 3.2 1.3 246 3.0 1.4 214
TWO OCEAN PLATEAU 9240 2.8 1.5 187 2.2 1.6 138
WILLOW CREEK 8380 1.7 .6 283 4.2 2.0 210
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Basin wide percent of average 227 184
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 2.3 1.6 144 1.8 1.1 164
BLACK BEAR 8170 1.8 1.0 180 2.6 1.7 153
CANYON 7870 .3 .3 100 1.3 .9 144
FISHER CREEK 9100 2.3 1.1 209 2.5 1.6 156
MADISON PLATEAU 7750 .8 .5 160 2.6 1.4 186
NORTHEAST ENTRANCE 7350 .1 .1 100 1.3 .9 144
PARKER PEAK 9400 1.1 1.6 69 1.8 1.3 138
SYLVAN LAKE 8420 .5 1.0 50 1.5 1.4 107
THUMB DIVIDE 7980 .2 .2 100 3.0 1.1 273
TWO OCEAN PLATEAU 9240 2.8 1.5 187 2.2 1.6 138
WHISKEY CREEK 6800 .3 .2 150 1.9 1.1 173
WHITE MILL 8700 2.0 .8 250 1.9 1.4 136
WOLVERINE 7650 .2 .2 100 1.2 1.1 109
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Basin wide percent of average 146 154
WIND RIVER
BURROUGHS CREEK 8750 2.4 .4 600 2.2 .9 244
COLD SPRINGS 9630 1.9 .4 475 2.3 1.0 230
DEER PARK 9700 2.9 1.0 290 3.7 1.2 308
HOBBS PARK 10100 3.1 1.2 258 -M 1.2 *
LITTLE WARM 9370 1.5 .5 300 1.9 .9 211
SOUTH PASS 9040 2.6 .6 433 3.2 1.0 320
ST. LAWRENCE ALT 8620 1.3 .4 325 2.5 .9 278
TOGWOTEE PASS 9580 3.2 1.3 246 3.0 1.4 214
TOWNSEND CREEK 8700 2.2 .6 367 2.8 1.2 233
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Basin wide percent of average 330 254
BIGHORN BASIN
BALD MTN. 9380 2.5 1.7 147 2.2 1.4 157
BEAR TRAP MEADOW 8200 1.0 .4 250 1.6 1.0 160
BLACKWATER 9780 3.0 1.9 158 2.4 1.4 171
BONE SPRINGS DIV 9350 1.7 1.5 113 1.9 1.5 127
EVENING STAR 9200 2.9 1.5 193 3.2 1.4 229
GRAVE SPRINGS 8550 1.7 .7 243 2.2 1.3 169
KIRWIN 9550 2.3 1.0 230 1.8 .9 200
MARQUETTE 8760 2.4 1.3 185 2.3 1.3 177
MIDDLE POWDER 7760 2.2 .9 244 2.5 1.5 167
OWL CREEK 8975 2.2 .5 440 1.7 .7 243
POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.1 155
SHELL CREEK 9580 2.4 1.8 133 1.8 1.1 164
SYLVAN LAKE 8420 .5 1.0 50 1.5 1.4 107
SYLVAN ROAD 7120 .0 .2 0 1.2 .9 133
TIMBER CREEK 7950 1.2 .6 200 1.9 .9 211
YOUNTS PEAK 8350 1.3 .6 217 1.6 1.0 160
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Basin wide percent of average 177 168
SHOSHONE RIVER
BLACKWATER 9780 3.0 1.9 158 2.4 1.4 171
EVENING STAR 9200 2.9 1.5 193 3.2 1.4 229
KIRWIN 9550 2.3 1.0 230 1.8 .9 200
MARQUETTE 8760 2.4 1.3 185 2.3 1.3 177
SYLVAN LAKE 8420 .5 1.0 50 1.5 1.4 107
SYLVAN ROAD 7120 .0 .2 0 1.2 .9 133
YOUNTS PEAK 8350 1.3 .6 217 1.6 1.0 160
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Basin wide percent of average 165 169
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.0 .4 250 1.6 1.0 160
BIG GOOSE 7990 .9 .4 225 1.9 1.3 146
BONE SPRINGS DIV 9350 1.7 1.5 113 1.9 1.5 127
BURGESS JUNCTION 7880 1.7 .9 189 2.1 1.3 162
CLOUD PEAK RESERVOIR 9860 1.7 .8 212 2.5 1.5 167
DOME LAKE 8880 1.5 1.0 150 2.3 1.4 164
GRAVE SPRINGS 8550 1.7 .7 243 2.2 1.3 169
HANSEN SAWMILL 8360 1.1 .4 275 1.7 1.0 170
MIDDLE POWDER 7760 2.2 .9 244 2.5 1.5 167
POWDER RIVER PASS 9480 1.5 .7 214 1.7 1.1 155
SUCKER CREEK 8880 1.9 .8 237 2.0 1.4 143
TIE CREEK 6870 -M .5 * 2.4 1.5 160
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Basin wide percent of average 199 157
BELLE FOURCHE
BLIND PARK 6890 .1 .2 50 2.1 1.4 150
COLE CANYON 5910 .0 .4 0 3.1 1.0 310
NORTH RAPID CREEK 6130 .2 .2 100 2.1 1.4 150
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Basin wide percent of average 38 192
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .1 0 2.5 1.2 208
DIVIDE PEAK 8880 .2 .9 22 2.7 1.5 180
ELK RIVER 8700 .0 .2 0 2.1 1.2 175
JOE WRIGHT 10120 1.1 1.1 100 2.2 1.8 122
NORTH FRENCH CREEK 10130 4.9 1.6 306 5.1 1.7 300
OLD BATTLE 10000 5.0 1.4 357 5.3 1.8 294
SAGE CREEK BASIN 7850 .0 .5 0 2.0 .8 250
SOUTH BRUSH CREEK 8440 .1 .2 50 3.2 1.4 229
TOWER 10500 5.2 1.3 400 5.3 1.9 279
WEBBER SPRINGS 9250 1.8 .7 257 3.8 1.6 237
WILLOW CREEK PASS 9540 .7 .5 140 1.4 1.1 127
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Basin wide percent of average 224 222
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.6 1.1 327 -M 1.2 *
CASPER MTN. 7900 .4 .8 50 2.2 1.3 169
DEADMAN HILL 10220 .3 1.1 27 2.6 1.3 200
DEER PARK 9700 2.9 1.0 290 3.7 1.2 308
LAPRELE CREEK 8375 .4 .4 100 1.8 1.0 180
RENO HILL 8400 1.0 .9 111 2.2 1.3 169
ROACH 9700 1.6 .4 400 2.7 1.2 225
SAND LAKE 10050 4.8 1.6 300 5.0 1.6 312
SOUTH PASS 9040 2.6 .6 433 3.2 1.0 320
WINDY PEAK 7900 .4 .2 200 2.1 .9 233
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Basin wide percent of average 222 236
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 1.2 1.0 120
DIVIDE PEAK 8880 .2 .9 22 2.7 1.5 180
OLD BATTLE 10000 5.0 1.4 357 5.3 1.8 294
SANDSTONE RS 8150 -M .1 * 1.4 1.2 117
WHISKEY PARK 8950 1.5 .7 214 4.0 1.6 250
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Basin wide percent of average 223 206
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.8 .5 560 2.9 1.0 290
BLIND BULL SUM 8650 2.1 .6 350 1.8 1.1 164
EAST RIM DIVIDE 7930 .1 .1 100 1.8 .7 257
ELKHART PARK G.S. 9400 2.3 .3 767 2.3 1.1 209
GROS VENTRE SUMMIT 8750 1.8 .7 257 1.8 1.0 180
GUNSIGHT PASS 9820 1.7 -M * 2.6 -M *
KENDALL R.S. 7740 .2 .1 200 1.8 .8 225
LOOMIS PARK 8240 .6 .3 200 1.9 .9 211
NEW FORK LAKE 8340 .1 .1 100 2.2 .8 275
SNIDER BASIN 8060 1.1 .2 550 2.3 .7 329
SPRING CREEK DIVIDE 9000 2.9 .5 580 3.4 1.2 283
TRIPLE PEAK 8500 2.1 .4 525 3.3 1.1 300
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Basin wide percent of average 424 245
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 2.2 .7 314
HEWINTA 9519 .1 .5 20 1.0 1.3 77
HICKERSON PARK 9145 .1 .1 100 .8 .9 89
HOLE-IN-ROCK 9150 .0 .1 0 1.0 1.0 100
INDIAN CREEK 9425 4.0 .5 800 4.2 1.2 350
KELLEY R.S. 8180 1.2 .3 400 3.1 1.1 282
STEEL CREEK PARK 10200 1.0 .9 111 1.0 1.2 83
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Basin wide percent of average 267 180
UPPER BEAR RIVER
BUG LAKE 7950 .2 .6 33 1.9 1.3 146
HAYDEN FORK 9212 .1 .4 25 1.8 1.3 138
KELLEY R.S. 8180 1.2 .3 400 3.1 1.1 282
LILY LAKE 9156 .3 .5 60 1.1 1.3 85
MONTE CRISTO 8960 .7 .8 87 2.4 1.5 160
SALT RIVER SUMMIT 7760 .2 .0 2.1 1.0 210
TRIAL LAKE 9992 2.1 1.0 210 2.4 1.4 171
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Basin wide percent of average 128 166
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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.