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 SUNDAY: OCTOBER 18 , 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 1.7 1.0 170
COTTONWOOD CREEK 7670 .6 .2 300 3.0 1.4 214
GRAND TARGHEE 9260 4.0 -M * 3.4 -M *
GRANITE CREEK 6770 .1 .1 100 1.6 .8 200
GRASSY LAKE 7265 .1 .4 25 1.9 1.6 119
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 -M .2 * -M 1.4 *
PHILLIPS BENCH 8200 .6 .3 200 1.9 1.1 173
SALT RIVER SUMMIT 7760 .2 .0 2.2 .9 244
SNAKE RIVER STATION 6920 .0 .0 100 1.6 1.1 145
SPRING CREEK DIVIDE 9000 3.0 .4 750 3.3 1.1 300
THUMB DIVIDE 7980 .6 .2 300 2.8 1.1 255
TOGWOTEE PASS 9580 3.2 1.2 267 2.9 1.4 207
TWO OCEAN PLATEAU 9240 2.9 1.4 207 2.1 1.5 140
WILLOW CREEK 8380 2.1 .6 350 4.2 1.8 233
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Basin wide percent of average 268 196
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 2.3 1.5 153 1.8 1.0 180
BLACK BEAR 8170 2.0 .9 222 2.6 1.5 173
CANYON 7870 .6 .3 200 1.1 .8 138
FISHER CREEK 9100 2.4 1.1 218 2.5 1.5 167
MADISON PLATEAU 7750 1.1 .5 220 2.6 1.3 200
NORTHEAST ENTRANCE 7350 .0 .1 0 1.2 .8 150
PARKER PEAK 9400 -M 1.5 * 1.7 1.3 131
SYLVAN LAKE 8420 .8 1.0 80 1.5 1.3 115
THUMB DIVIDE 7980 .6 .2 300 2.8 1.1 255
TWO OCEAN PLATEAU 9240 2.9 1.4 207 2.1 1.5 140
WHISKEY CREEK 6800 .2 .1 200 1.6 1.0 160
WHITE MILL 8700 2.0 .8 250 1.8 1.3 138
WOLVERINE 7650 .1 .2 50 1.2 1.0 120
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Basin wide percent of average 185 159
WIND RIVER
BURROUGHS CREEK 8750 2.4 .3 800 2.2 .8 275
COLD SPRINGS 9630 2.0 .4 500 2.4 .9 267
DEER PARK 9700 3.0 1.1 273 3.7 1.1 336
HOBBS PARK 10100 3.1 1.1 282 -M 1.1 *
LITTLE WARM 9370 1.6 .5 320 1.9 .9 211
SOUTH PASS 9040 2.7 .6 450 3.2 1.0 320
ST. LAWRENCE ALT 8620 1.6 .3 533 2.5 .9 278
TOGWOTEE PASS 9580 3.2 1.2 267 2.9 1.4 207
TOWNSEND CREEK 8700 2.3 .5 460 2.9 1.1 264
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Basin wide percent of average 365 268
BIGHORN BASIN
BALD MTN. 9380 2.4 1.7 141 2.2 1.3 169
BEAR TRAP MEADOW 8200 1.3 .3 433 1.7 .9 189
BLACKWATER 9780 3.0 1.8 167 2.4 1.4 171
BONE SPRINGS DIV 9350 1.7 1.5 113 1.9 1.4 136
EVENING STAR 9200 3.0 1.4 214 3.2 1.4 229
GRAVE SPRINGS 8550 1.9 .4 475 2.3 1.2 192
KIRWIN 9550 2.2 1.0 220 1.8 .9 200
MARQUETTE 8760 2.9 1.2 242 2.6 1.2 217
MIDDLE POWDER 7760 2.5 .8 312 2.6 1.4 186
OWL CREEK 8975 2.4 .5 480 1.8 .6 300
POWDER RIVER PASS 9480 1.5 .6 250 1.7 1.1 155
SHELL CREEK 9580 2.3 1.7 135 1.8 1.1 164
SYLVAN LAKE 8420 .8 1.0 80 1.5 1.3 115
SYLVAN ROAD 7120 .0 .2 0 1.3 .9 144
TIMBER CREEK 7950 1.4 .6 233 1.8 .8 225
YOUNTS PEAK 8350 1.2 .6 200 1.5 1.0 150
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Basin wide percent of average 199 179
SHOSHONE RIVER
BLACKWATER 9780 3.0 1.8 167 2.4 1.4 171
EVENING STAR 9200 3.0 1.4 214 3.2 1.4 229
KIRWIN 9550 2.2 1.0 220 1.8 .9 200
MARQUETTE 8760 2.9 1.2 242 2.6 1.2 217
SYLVAN LAKE 8420 .8 1.0 80 1.5 1.3 115
SYLVAN ROAD 7120 .0 .2 0 1.3 .9 144
YOUNTS PEAK 8350 1.2 .6 200 1.5 1.0 150
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Basin wide percent of average 182 177
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.3 .3 433 1.7 .9 189
BIG GOOSE 7990 1.3 .4 325 2.0 1.2 167
BONE SPRINGS DIV 9350 1.7 1.5 113 1.9 1.4 136
BURGESS JUNCTION 7880 1.9 .8 237 2.2 1.2 183
CLOUD PEAK RESERVOIR 9860 1.7 .7 243 2.3 1.4 164
DOME LAKE 8880 1.7 1.0 170 2.3 1.4 164
GRAVE SPRINGS 8550 1.9 .4 475 2.3 1.2 192
HANSEN SAWMILL 8360 1.4 .4 350 1.8 1.0 180
MIDDLE POWDER 7760 2.5 .8 312 2.6 1.4 186
POWDER RIVER PASS 9480 1.5 .6 250 1.7 1.1 155
SUCKER CREEK 8880 2.1 .7 300 2.1 1.3 162
TIE CREEK 6870 1.3 .3 433 2.4 1.5 160
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Basin wide percent of average 257 169
BELLE FOURCHE
BLIND PARK 6890 .1 .1 100 2.1 1.3 162
COLE CANYON 5910 .4 .4 100 2.9 1.0 290
NORTH RAPID CREEK 6130 .3 .2 150 2.2 1.4 157
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Basin wide percent of average 114 195
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .1 0 2.4 1.1 218
DIVIDE PEAK 8880 .3 .8 37 2.8 1.4 200
ELK RIVER 8700 .1 .2 50 2.0 1.1 182
JOE WRIGHT 10120 1.3 1.0 130 2.2 1.7 129
NORTH FRENCH CREEK 10130 4.9 1.5 327 5.1 1.5 340
OLD BATTLE 10000 5.0 1.3 385 5.3 1.7 312
SAGE CREEK BASIN 7850 .0 .4 0 2.0 .8 250
SOUTH BRUSH CREEK 8440 .2 .2 100 3.0 1.3 231
TOWER 10500 5.2 1.2 433 5.2 1.7 306
WEBBER SPRINGS 9250 2.0 .6 333 3.9 1.5 260
WILLOW CREEK PASS 9540 .8 .4 200 1.3 1.0 130
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Basin wide percent of average 257 238
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.6 1.0 360 -M 1.2 *
CASPER MTN. 7900 .9 .7 129 2.2 1.2 183
DEADMAN HILL 10220 .4 1.1 36 2.6 1.3 200
DEER PARK 9700 3.0 1.1 273 3.7 1.1 336
LAPRELE CREEK 8375 .7 .3 233 1.8 .9 200
RENO HILL 8400 1.2 .8 150 2.0 1.2 167
ROACH 9700 1.7 .3 567 2.6 1.2 217
SAND LAKE 10050 4.8 1.5 320 4.9 1.5 327
SOUTH PASS 9040 2.7 .6 450 3.2 1.0 320
WINDY PEAK 7900 .8 .1 800 2.0 .9 222
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Basin wide percent of average 264 243
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 1.2 .9 133
DIVIDE PEAK 8880 .3 .8 37 2.8 1.4 200
OLD BATTLE 10000 5.0 1.3 385 5.3 1.7 312
SANDSTONE RS 8150 -M .1 * 1.4 1.1 127
WHISKEY PARK 8950 1.7 .6 283 4.0 1.5 267
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Basin wide percent of average 259 223
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.7 .5 540 2.7 .9 300
BLIND BULL SUM 8650 2.2 .5 440 1.9 1.0 190
EAST RIM DIVIDE 7930 .1 .1 100 1.8 .7 257
ELKHART PARK G.S. 9400 2.3 .3 767 2.2 1.0 220
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 .0 1.8 .8 225
LOOMIS PARK 8240 .8 .3 267 1.8 .9 200
NEW FORK LAKE 8340 .1 .1 100 1.5 .8 188
SNIDER BASIN 8060 1.2 .2 600 2.2 .7 314
SPRING CREEK DIVIDE 9000 3.0 .4 750 3.3 1.1 300
TRIPLE PEAK 8500 2.1 .3 700 3.2 1.1 291
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Basin wide percent of average 479 242
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 2.1 .7 300
HEWINTA 9519 .0 .4 0 1.0 1.2 83
HICKERSON PARK 9145 .1 .1 100 .7 .9 78
HOLE-IN-ROCK 9150 .0 .1 0 1.0 .9 111
INDIAN CREEK 9425 4.1 .5 820 4.1 1.2 342
KELLEY R.S. 8180 1.5 .3 500 3.0 1.0 300
STEEL CREEK PARK 10200 .9 .8 112 1.0 1.2 83
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Basin wide percent of average 300 182
UPPER BEAR RIVER
BUG LAKE 7950 .2 .6 33 2.0 1.2 167
HAYDEN FORK 9212 .1 .4 25 1.9 1.2 158
KELLEY R.S. 8180 1.5 .3 500 3.0 1.0 300
LILY LAKE 9156 .2 .5 40 1.1 1.2 92
MONTE CRISTO 8960 .9 .8 112 2.3 1.4 164
SALT RIVER SUMMIT 7760 .2 .0 2.2 .9 244
TRIAL LAKE 9992 2.2 .9 244 2.4 1.4 171
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Basin wide percent of average 146 180
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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.