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 16 , 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 .8 212
COTTONWOOD CREEK 7670 .8 .1 800 3.0 1.2 250
GRAND TARGHEE 9260 4.1 -M * 3.3 -M *
GRANITE CREEK 6770 .2 .1 200 1.6 .7 229
GRASSY LAKE 7265 .2 .3 67 1.9 1.4 136
GROS VENTRE SUMMIT 8750 1.8 .6 300 1.8 .8 225
GUNSIGHT PASS 9820 1.7 -M * 2.5 -M *
LEWIS LAKE DIVIDE 7850 .7 .1 700 2.2 1.2 183
PHILLIPS BENCH 8200 .8 .2 400 1.9 1.0 190
SALT RIVER SUMMIT 7760 .2 .0 2.2 .8 275
SNAKE RIVER STATION 6920 .1 .0 1.6 1.0 160
SPRING CREEK DIVIDE 9000 3.0 .3 1000 3.3 .9 367
THUMB DIVIDE 7980 1.2 .1 1200 2.8 .9 311
TOGWOTEE PASS 9580 3.2 1.0 320 2.9 1.2 242
TWO OCEAN PLATEAU 9240 3.0 1.2 250 2.2 1.3 169
WILLOW CREEK 8380 2.6 .4 650 4.2 1.6 262
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Basin wide percent of average 389 225
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 2.2 1.3 169 1.6 .9 178
BLACK BEAR 8170 2.2 .8 275 2.6 1.3 200
CANYON 7870 .7 .2 350 1.1 .7 157
FISHER CREEK 9100 2.4 1.0 240 2.4 1.3 185
MADISON PLATEAU 7750 1.3 .4 325 2.4 1.1 218
NORTHEAST ENTRANCE 7350 .0 .1 0 1.2 .7 171
PARKER PEAK 9400 -M 1.2 * 1.3 1.1 118
SYLVAN LAKE 8420 1.1 .9 122 1.5 1.1 136
THUMB DIVIDE 7980 1.2 .1 1200 2.8 .9 311
TWO OCEAN PLATEAU 9240 3.0 1.2 250 2.2 1.3 169
WHISKEY CREEK 6800 .3 .1 300 1.6 .9 178
WHITE MILL 8700 2.0 .7 286 1.7 1.1 155
WOLVERINE 7650 .2 .1 200 1.1 .9 122
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Basin wide percent of average 241 177
WIND RIVER
BURROUGHS CREEK 8750 -M .3 * 2.1 .7 300
COLD SPRINGS 9630 1.9 .2 950 2.2 .8 275
DEER PARK 9700 3.0 .8 375 3.5 1.0 350
HOBBS PARK 10100 3.1 .7 443 -M .9 *
LITTLE WARM 9370 1.6 .4 400 1.9 .8 237
SOUTH PASS 9040 2.6 .4 650 3.1 .8 388
ST. LAWRENCE ALT 8620 1.5 .1 1500 2.4 .8 300
TOGWOTEE PASS 9580 3.2 1.0 320 2.9 1.2 242
TOWNSEND CREEK 8700 2.3 .3 767 2.7 1.0 270
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Basin wide percent of average 492 293
BIGHORN BASIN
BALD MTN. 9380 2.4 1.5 160 2.0 1.1 182
BEAR TRAP MEADOW 8200 1.2 .2 600 1.6 .8 200
BLACKWATER 9780 2.9 1.5 193 2.3 1.2 192
BONE SPRINGS DIV 9350 1.6 1.3 123 1.6 1.2 133
EVENING STAR 9200 3.0 1.2 250 3.1 1.2 258
GRAVE SPRINGS 8550 1.9 .2 950 2.2 1.1 200
KIRWIN 9550 2.2 .8 275 1.7 .8 212
MARQUETTE 8760 2.9 .9 322 2.3 1.0 230
MIDDLE POWDER 7760 2.7 .6 450 2.4 1.2 200
OWL CREEK 8975 2.3 .3 767 1.6 .5 320
POWDER RIVER PASS 9480 1.5 .5 300 1.6 .9 178
SHELL CREEK 9580 2.2 1.6 138 1.8 .9 200
SYLVAN LAKE 8420 1.1 .9 122 1.5 1.1 136
SYLVAN ROAD 7120 .0 .1 0 1.3 .7 186
TIMBER CREEK 7950 1.5 .1 1500 1.9 .7 271
YOUNTS PEAK 8350 1.3 .6 217 1.6 .9 178
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Basin wide percent of average 250 199
SHOSHONE RIVER
BLACKWATER 9780 2.9 1.5 193 2.3 1.2 192
EVENING STAR 9200 3.0 1.2 250 3.1 1.2 258
KIRWIN 9550 2.2 .8 275 1.7 .8 212
MARQUETTE 8760 2.9 .9 322 2.3 1.0 230
SYLVAN LAKE 8420 1.1 .9 122 1.5 1.1 136
SYLVAN ROAD 7120 .0 .1 0 1.3 .7 186
YOUNTS PEAK 8350 1.3 .6 217 1.6 .9 178
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Basin wide percent of average 223 200
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.2 .2 600 1.6 .8 200
BIG GOOSE 7990 1.2 .3 400 1.8 1.1 164
BONE SPRINGS DIV 9350 1.6 1.3 123 1.6 1.2 133
BURGESS JUNCTION 7880 1.8 .6 300 2.0 1.1 182
CLOUD PEAK RESERVOIR 9860 1.7 .4 425 2.3 1.3 177
DOME LAKE 8880 1.6 .7 229 2.1 1.2 175
GRAVE SPRINGS 8550 1.9 .2 950 2.2 1.1 200
HANSEN SAWMILL 8360 1.4 .2 700 1.6 .8 200
MIDDLE POWDER 7760 2.7 .6 450 2.4 1.2 200
POWDER RIVER PASS 9480 1.5 .5 300 1.6 .9 178
SUCKER CREEK 8880 2.0 .5 400 2.0 1.1 182
TIE CREEK 6870 1.6 .0 2.3 1.3 177
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Basin wide percent of average 338 179
BELLE FOURCHE
BLIND PARK 6890 .2 .0 2.1 1.1 191
COLE CANYON 5910 .9 .2 450 2.8 .9 311
NORTH RAPID CREEK 6130 .2 .1 200 2.1 1.2 175
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Basin wide percent of average 367 219
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 2.4 .9 267
DIVIDE PEAK 8880 .6 .7 86 2.8 1.2 233
ELK RIVER 8700 .1 .1 100 2.1 .9 233
JOE WRIGHT 10120 1.4 .8 175 2.3 1.5 153
NORTH FRENCH CREEK 10130 5.0 1.4 357 -M 1.3 *
OLD BATTLE 10000 5.1 1.1 464 5.2 1.4 371
SAGE CREEK BASIN 7850 .0 .3 0 2.0 .7 286
SOUTH BRUSH CREEK 8440 .6 .2 300 3.0 1.1 273
TOWER 10500 5.4 1.0 540 5.2 1.5 347
WEBBER SPRINGS 9250 2.1 .5 420 3.9 1.3 300
WILLOW CREEK PASS 9540 .6 .3 200 1.3 .9 144
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Basin wide percent of average 327 265
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.6 .9 400 -M 1.0 *
CASPER MTN. 7900 .8 .6 133 2.2 1.1 200
DEADMAN HILL 10220 .5 .9 56 2.6 1.1 236
DEER PARK 9700 3.0 .8 375 3.5 1.0 350
LAPRELE CREEK 8375 .7 .3 233 1.7 .8 212
RENO HILL 8400 1.2 .7 171 1.8 1.1 164
ROACH 9700 1.9 .3 633 2.7 1.0 270
SAND LAKE 10050 4.9 1.3 377 4.8 1.3 369
SOUTH PASS 9040 2.6 .4 650 3.1 .8 388
WINDY PEAK 7900 .8 .1 800 1.7 .8 212
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Basin wide percent of average 317 268
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 1.1 .7 157
DIVIDE PEAK 8880 .6 .7 86 2.8 1.2 233
OLD BATTLE 10000 5.1 1.1 464 5.2 1.4 371
SANDSTONE RS 8150 -M .1 * 1.4 .9 156
WHISKEY PARK 8950 1.9 .5 380 4.0 1.3 308
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Basin wide percent of average 330 264
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.8 .4 700 2.7 .8 338
BLIND BULL SUM 8650 2.3 .4 575 1.9 .9 211
EAST RIM DIVIDE 7930 .2 .0 1.7 .6 283
ELKHART PARK G.S. 9400 2.3 .2 1150 2.2 .9 244
GROS VENTRE SUMMIT 8750 1.8 .6 300 1.8 .8 225
GUNSIGHT PASS 9820 1.7 -M * 2.5 -M *
KENDALL R.S. 7740 .4 .0 1.8 .7 257
LOOMIS PARK 8240 1.1 .2 550 1.9 .8 237
NEW FORK LAKE 8340 .3 .0 1.4 .7 200
SNIDER BASIN 8060 1.3 .1 1300 2.3 .6 383
SPRING CREEK DIVIDE 9000 3.0 .3 1000 3.3 .9 367
TRIPLE PEAK 8500 2.3 .2 1150 3.3 .9 367
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Basin wide percent of average 704 283
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 2.1 .6 350
HEWINTA 9519 .0 .4 0 1.0 1.0 100
HICKERSON PARK 9145 .0 .0 100 .7 .8 87
HOLE-IN-ROCK 9150 .0 .0 100 1.0 .8 125
INDIAN CREEK 9425 4.3 .4 1075 4.0 1.0 400
KELLEY R.S. 8180 1.7 .2 850 3.0 .8 375
STEEL CREEK PARK 10200 1.1 .8 138 1.1 1.0 110
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Basin wide percent of average 394 215
UPPER BEAR RIVER
BUG LAKE 7950 .2 .5 40 1.9 1.0 190
HAYDEN FORK 9212 .1 .4 25 1.9 1.0 190
KELLEY R.S. 8180 1.7 .2 850 3.0 .8 375
LILY LAKE 9156 .0 .4 0 1.1 1.0 110
MONTE CRISTO 8960 1.5 .7 214 2.0 1.2 167
SALT RIVER SUMMIT 7760 .2 .0 2.2 .8 275
TRIAL LAKE 9992 2.2 .8 275 2.4 1.2 200
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Basin wide percent of average 190 207
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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.