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 THURSDAY: OCTOBER 20 , 2011
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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 .1 .2 50* 3.2 1.2 267
COTTONWOOD CREEK 7670 .1 .3 33* 4.3 1.7 253
GRAND TARGHEE 9260 2.5 -M * 4.9 -M *
GRANITE CREEK 6770 .0 .2 0* 2.3 1.0 230
GRASSY LAKE 7265 .0 .5 0* 5.0 1.9 263
GROS VENTRE SUMMIT 8750 .4 .8 50* 2.1 1.1 191
GUNSIGHT PASS 9820 .9 -M * 2.4 -M *
LEWIS LAKE DIVIDE 7850 .2 .3 67* 4.1 1.7 241
PHILLIPS BENCH 8200 .0 .5 0* 2.5 1.3 192
SALT RIVER SUMMIT 7760 .0 .0 100* 2.2 1.1 200
SNAKE RIVER STATION 6920 .0 .1 0* 3.4 1.3 262
SPRING CREEK DIVIDE 9000 1.3 .6 217* 3.2 1.4 229
THUMB DIVIDE 7980 .0 .3 0* 2.3 1.3 177
TOGWOTEE PASS 9580 1.4 1.4 100* 2.8 1.6 175
TWO OCEAN PLATEAU 9240 3.0 1.7 176* 3.5 1.8 194
WILLOW CREEK 8380 .1 .8 13* 4.9 2.2 223
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Basin wide percent of average 86* 222
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 1.2 1.7 71* 2.0 1.2 167
BLACK BEAR 8170 1.9 1.1 173* 4.7 1.9 247
CANYON 7870 .0 .3 0* 1.4 1.0 140
FISHER CREEK 9100 1.4 1.3 108* 3.4 1.9 179
MADISON PLATEAU 7750 .0 .6 0* 3.6 1.5 240
NORTHEAST ENTRANCE 7350 .0 .1 0* 1.6 1.0 160
PARKER PEAK 9400 .0 1.8 0* 2.0 1.5 133
SYLVAN LAKE 8420 .0 1.1 0* 3.5 1.6 219
THUMB DIVIDE 7980 .0 .3 0* 2.3 1.3 177
TWO OCEAN PLATEAU 9240 3.0 1.7 176* 3.5 1.8 194
WHISKEY CREEK 6800 .0 .2 0* 3.2 1.3 246
WHITE MILL 8700 .8 .9 89* 2.7 1.6 169
WOLVERINE 7650 .0 .2 0* 1.6 1.2 133
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Basin wide percent of average 73* 189
WIND RIVER
BURROUGHS CREEK 8750 .0 .4 0* 1.3 1.0 130
CASTLE CREEK 8400 .0 -M * 1.1 -M *
COLD SPRINGS 9630 .0 .6 0* 1.6 1.1 145
DEER PARK 9700 .9 1.1 82* 2.4 1.4 171
HOBBS PARK 10100 1.7 1.4 121* 2.3 1.3 177
LITTLE WARM 9370 .0 .7 0* 1.6 1.0 160
SOUTH PASS 9040 .7 .7 100* 2.1 1.2 175
ST. LAWRENCE ALT 8620 .0 .5 0* 1.0 1.1 91
TOGWOTEE PASS 9580 1.4 1.4 100* 2.8 1.6 175
TOWNSEND CREEK 8700 .0 .6 0* 2.3 1.3 177
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Basin wide percent of average 64* 158
BIGHORN BASIN
BALD MTN. 9380 2.8 1.8 156* 3.2 1.5 213
BEAR TRAP MEADOW 8200 .0 .4 0* 1.8 1.1 164
BLACKWATER 9780 2.5 2.1 119* 2.9 1.6 181
BONE SPRINGS DIV 9350 3.1 1.7 182* 3.8 1.6 238
EVENING STAR 9200 .0 1.6 0* 2.9 1.6 181
GRAVE SPRINGS 8550 .0 .7 0* 1.9 1.4 136
KIRWIN 9550 1.6 1.1 145* 2.7 1.1 245
MARQUETTE 8760 .0 -M * 3.2 1.4 229
MIDDLE POWDER 7760 .9 .9 100* 3.9 1.7 229
OWL CREEK 8975 .8 .6 133 1.5 .7 214
POWDER RIVER PASS 9480 1.7 .8 213* 2.8 1.3 215
SHELL CREEK 9580 3.6 1.9 189 3.4 1.3 262
SYLVAN LAKE 8420 .0 1.1 0* 3.5 1.6 219
SYLVAN ROAD 7120 .0 .2 0* 1.9 1.1 173
TIMBER CREEK 7950 .0 .6 0 3.5 1.0 350
YOUNTS PEAK 8350 .0 .7 0* 2.2 1.2 183
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Basin wide percent of average 105* 213
SHOSHONE RIVER
BLACKWATER 9780 2.5 2.1 119* 2.9 1.6 181
EVENING STAR 9200 .0 1.6 0* 2.9 1.6 181
KIRWIN 9550 1.6 1.1 145* 2.7 1.1 245
MARQUETTE 8760 .0 -M * 3.2 1.4 229
SYLVAN LAKE 8420 .0 1.1 0* 3.5 1.6 219
SYLVAN ROAD 7120 .0 .2 0* 1.9 1.1 173
YOUNTS PEAK 8350 .0 .7 0* 2.2 1.2 183
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Basin wide percent of average 60* 201
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .4 0* 1.8 1.1 164
BIG GOOSE 7990 1.4 .5 280* 4.0 1.4 286
BONE SPRINGS DIV 9350 3.1 1.7 182* 3.8 1.6 238
BURGESS JUNCTION 7880 1.3 1.0 130* 3.9 1.5 260
CLOUD PEAK RESERVOIR 9860 1.5 .9 167* 3.4 1.7 200
DOME LAKE 8880 2.1 1.1 191* 4.1 1.6 256
GRAVE SPRINGS 8550 .0 .7 0* 1.9 1.4 136
HANSEN SAWMILL 8360 .0 .4 0* 1.6 1.2 133
LITTLE GOOSE 8870 1.6 -M * 4.4 -M *
MIDDLE POWDER 7760 .9 .9 100* 3.9 1.7 229
POWDER RIVER PASS 9480 1.7 .8 213* 2.8 1.3 215
SOLDIER PARK 8720 .0 -M * 2.4 -M *
SUCKER CREEK 8880 2.4 .8 300* 3.8 1.6 238
TIE CREEK 6870 .0 .4 0* 4.2 1.7 247
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Basin wide percent of average 150* 220
BELLE FOURCHE
BLIND PARK 6890 .0 .1 0* 1.0 1.6 63
COLE CANYON 5910 .0 .4 0* 1.3 1.2 108
NORTH RAPID CREEK 6130 .0 .2 0* .5 1.6 31
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Basin wide percent of average 0* 64
UPPER N. PLATTE RIVER
BLACKHALL MTN 9820 1.7 -M * 3.2 -M *
CINNABAR PARK 9574 .5 .6 83* 2.5 1.3 192
COLUMBINE 9160 .0 .1 0* 2.0 1.3 154
DIVIDE PEAK 8880 .1 1.0 10* 2.5 1.7 147
ELK RIVER 8700 .0 .2 0* 2.0 1.3 154
JOE WRIGHT 10120 .0 1.3 0* 2.3 2.1 110
NORTH FRENCH CREEK 10130 1.7 1.9 89* 3.2 1.9 168
OLD BATTLE 10000 1.7 1.6 106* 3.0 2.1 143
SAGE CREEK BASIN 7850 .0 .6 0* 1.6 1.0 160
SOUTH BRUSH CREEK 8440 .1 .3 33* 2.2 1.6 138
TOWER 10500 .7 1.6 44* 2.7 2.2 123
WEBBER SPRINGS 9250 .3 .8 38* 2.8 1.8 156
WILLOW CREEK PASS 9540 1.1 .5 220* 5.3 1.2 442
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Basin wide percent of average 59* 165
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .5 1.2 42* 2.5 1.4 179
CASPER MTN. 7900 1.9 .9 211* 4.6 1.5 307
DEADMAN HILL 10220 .8 1.3 62* 2.0 1.5 133
DEER PARK 9700 .9 1.1 82* 2.4 1.4 171
LAPRELE CREEK 8375 .0 .4 0* 1.9 1.1 173
RENO HILL 8400 1.6 1.0 160* 3.2 1.5 213
ROACH 9700 .8 .5 160* 2.2 1.4 157
SAND LAKE 10050 2.3 1.8 128* 3.0 1.8 167
SOUTH PASS 9040 .7 .7 100* 2.1 1.2 175
WINDY PEAK 7900 .1 .2 50* 1.2 1.1 109
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Basin wide percent of average 105* 181
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .1 100* 1.4 1.1 127
DIVIDE PEAK 8880 .1 1.0 10* 2.5 1.7 147
OLD BATTLE 10000 1.7 1.6 106* 3.0 2.1 143
SANDSTONE RS 8150 -M .2 * 1.4 1.4 100
WHISKEY PARK 8950 .3 .8 38* 2.7 1.8 150
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Basin wide percent of average 63* 136
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .8 .6 133* 1.9 1.1 173
BLIND BULL SUM 8650 .7 .7 100* 2.1 1.2 175
EAST RIM DIVIDE 7930 .3 .2 150* 2.0 .8 250
ELKHART PARK G.S. 9400 .7 .4 175* 2.6 1.2 217
GROS VENTRE SUMMIT 8750 .4 .8 50* 2.1 1.1 191
GUNSIGHT PASS 9820 .9 -M * 2.4 -M *
KENDALL R.S. 7740 .1 .2 50* 2.1 .9 233
LOOMIS PARK 8240 .1 .4 25* 2.4 1.0 240
NEW FORK LAKE 8340 .1 .2 50* 2.5 .9 278
POCKET CREEK 9360 1.3 -M * 2.6 -M *
SNIDER BASIN 8060 .1 .3 33* 1.7 .9 189
SPRING CREEK DIVIDE 9000 1.3 .6 217* 3.2 1.4 229
TRIPLE PEAK 8500 .4 .4 100* 2.8 1.3 215
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Basin wide percent of average 104* 215
LOWER GREEN RIVER
HAMS FORK 7840 .1 .1 100* 2.4 .8 300
HEWINTA 9519 .0 .5 0* 2.7 1.5 180
HICKERSON PARK 9145 -M .1 * -M 1.0 *
HOLE-IN-ROCK 9150 .1 .2 50* 2.9 1.1 264
INDIAN CREEK 9425 1.9 .7 271* 3.2 1.4 229
KELLEY R.S. 8180 .4 .4 100* 2.9 1.2 242
STEEL CREEK PARK 10200 1.9 1.0 190* 3.2 1.4 229
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Basin wide percent of average 152* 234
UPPER BEAR RIVER
BUG LAKE 7950 .1 .7 14* 1.5 1.4 107
HAYDEN FORK 9212 .1 .5 20* 3.9 1.4 279
KELLEY R.S. 8180 .4 .4 100* 2.9 1.2 242
LILY LAKE 9156 .0 .6 0* 2.7 1.4 193
MONTE CRISTO 8960 .3 .9 33* 2.4 1.7 141
SALT RIVER SUMMIT 7760 .0 .0 100* 2.2 1.1 200
TRIAL LAKE 9992 .7 1.1 64* -M 1.6 *
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Basin wide percent of average 38* 190
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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 1971-2000.
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.