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 12 , 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 .3 .0 1.2 .6 200
COTTONWOOD CREEK 7670 1.0 .0 1.8 .9 200
GRAND TARGHEE 9260 3.0 -M * 2.2 -M *
GRANITE CREEK 6770 .7 .0 1.1 .5 220
GRASSY LAKE 7265 .8 .1 800 1.0 1.0 100
GROS VENTRE SUMMIT 8750 1.4 .4 350 1.4 .6 233
GUNSIGHT PASS 9820 1.5 -M * 1.9 -M *
LEWIS LAKE DIVIDE 7850 .7 .0 .9 .8 112
PHILLIPS BENCH 8200 .7 .0 1.1 .7 157
SALT RIVER SUMMIT 7760 .7 .0 1.1 .6 183
SNAKE RIVER STATION 6920 .1 .0 1.0 .7 143
SPRING CREEK DIVIDE 9000 2.0 .1 2000 2.1 .7 300
THUMB DIVIDE 7980 .9 .0 1.6 .6 267
TOGWOTEE PASS 9580 2.4 .7 343 2.1 .9 233
TWO OCEAN PLATEAU 9240 1.6 .8 200 1.0 .9 111
WILLOW CREEK 8380 2.4 .2 1200 2.7 1.1 245
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Basin wide percent of average 461* 190
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 1.5 1.0 150 .7 .6 117
BLACK BEAR 8170 1.1 .6 183 1.0 .9 111
CANYON 7870 .7 .2 350 .8 .5 160
FISHER CREEK 9100 .9 .7 129 .6 .9 67
MADISON PLATEAU 7750 1.1 .4 275 1.2 .8 150
NORTHEAST ENTRANCE 7350 .1 .0 .4 .5 80
PARKER PEAK 9400 -M 1.0 * .8 .8 100
SYLVAN LAKE 8420 .7 .6 117 .9 .8 112
THUMB DIVIDE 7980 .9 .0 1.6 .6 267
TWO OCEAN PLATEAU 9240 1.6 .8 200 1.0 .9 111
WHISKEY CREEK 6800 .7 .1 700 .7 .6 117
WHITE MILL 8700 .8 .5 160 .3 .8 37
WOLVERINE 7650 .8 .1 800 .7 .6 117
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Basin wide percent of average 198 115
WIND RIVER
BURROUGHS CREEK 8750 1.8 .2 900 1.6 .5 320
COLD SPRINGS 9630 1.7 .2 850 2.1 .6 350
DEER PARK 9700 -M .7 * 2.6 .7 371
HOBBS PARK 10100 2.9 .7 414 -M .6 *
LITTLE WARM 9370 1.3 .3 433 1.5 .5 300
SOUTH PASS 9040 2.1 .4 525 2.5 .6 417
ST. LAWRENCE ALT 8620 1.7 .1 1700 2.3 .5 460
TOGWOTEE PASS 9580 2.4 .7 343 2.1 .9 233
TOWNSEND CREEK 8700 2.2 .3 733 2.6 .7 371
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Basin wide percent of average 555 346
BIGHORN BASIN
BALD MTN. 9380 2.1 1.3 162 1.5 .8 188
BEAR TRAP MEADOW 8200 1.2 .2 600 1.5 .6 250
BLACKWATER 9780 2.3 1.3 177 1.6 .8 200
BONE SPRINGS DIV 9350 1.5 1.1 136 1.3 .9 144
EVENING STAR 9200 1.9 1.0 190 2.0 .8 250
GRAVE SPRINGS 8550 1.9 .4 475 2.2 .8 275
KIRWIN 9550 1.9 .8 237 1.4 .6 233
MARQUETTE 8760 2.8 .8 350 2.1 .7 300
MIDDLE POWDER 7760 2.7 .5 540 2.0 .8 250
OWL CREEK 8975 2.1 .4 525 1.5 .4 375
POWDER RIVER PASS 9480 1.5 .4 375 1.2 .7 171
SHELL CREEK 9580 2.1 1.4 150 1.8 .7 257
SYLVAN LAKE 8420 .7 .6 117 .9 .8 112
SYLVAN ROAD 7120 .4 .0 .8 .5 160
TIMBER CREEK 7950 1.3 .1 1300 1.7 .5 340
YOUNTS PEAK 8350 1.0 .5 200 .8 .6 133
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Basin wide percent of average 250 221
SHOSHONE RIVER
BLACKWATER 9780 2.3 1.3 177 1.6 .8 200
EVENING STAR 9200 1.9 1.0 190 2.0 .8 250
KIRWIN 9550 1.9 .8 237 1.4 .6 233
MARQUETTE 8760 2.8 .8 350 2.1 .7 300
SYLVAN LAKE 8420 .7 .6 117 .9 .8 112
SYLVAN ROAD 7120 .4 .0 .8 .5 160
YOUNTS PEAK 8350 1.0 .5 200 .8 .6 133
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Basin wide percent of average 212 200
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.2 .2 600 1.5 .6 250
BIG GOOSE 7990 1.0 .2 500 1.5 .8 188
BONE SPRINGS DIV 9350 1.5 1.1 136 1.3 .9 144
BURGESS JUNCTION 7880 1.7 .6 283 1.6 .8 200
CLOUD PEAK RESERVOIR 9860 1.7 .4 425 1.9 .9 211
DOME LAKE 8880 1.4 .7 200 1.9 .8 237
GRAVE SPRINGS 8550 1.9 .4 475 2.2 .8 275
HANSEN SAWMILL 8360 1.5 .2 750 1.5 .6 250
MIDDLE POWDER 7760 2.7 .5 540 2.0 .8 250
POWDER RIVER PASS 9480 1.5 .4 375 1.2 .7 171
SUCKER CREEK 8880 1.9 .5 380 1.8 .8 225
TIE CREEK 6870 1.6 .0 1.9 .9 211
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Basin wide percent of average 346 216
BELLE FOURCHE
BLIND PARK 6890 .8 .1 800 2.0 .8 250
COLE CANYON 5910 1.4 .2 700 2.7 .6 450
NORTH RAPID CREEK 6130 .7 .1 700 1.8 .8 225
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Basin wide percent of average 725 295
UPPER N. PLATTE RIVER
COLUMBINE 9160 .2 .0 1.5 .6 250
DIVIDE PEAK 8880 1.3 .5 260 2.4 .8 300
ELK RIVER 8700 .7 .1 700 1.7 .6 283
JOE WRIGHT 10120 .9 .5 180 1.5 1.1 136
NORTH FRENCH CREEK 10130 4.5 1.0 450 -M .9 *
OLD BATTLE 10000 3.8 .8 475 3.8 1.0 380
SAGE CREEK BASIN 7850 .1 .1 100 1.6 .5 320
SOUTH BRUSH CREEK 8440 1.3 .1 1300 2.7 .8 338
TOWER 10500 3.8 .7 543 3.4 1.0 340
WEBBER SPRINGS 9250 2.0 .4 500 2.9 .9 322
WILLOW CREEK PASS 9540 .2 .2 100 .8 .6 133
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Basin wide percent of average 423 282
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.2 .7 457 -M .7 *
CASPER MTN. 7900 1.0 .4 250 1.8 .7 257
DEADMAN HILL 10220 .5 .7 71 2.1 .8 262
DEER PARK 9700 -M .7 * 2.6 .7 371
LAPRELE CREEK 8375 1.0 .2 500 1.5 .5 300
RENO HILL 8400 1.2 .5 240 1.3 .7 186
ROACH 9700 1.7 .2 850 2.4 .7 343
SAND LAKE 10050 4.2 1.0 420 4.0 .9 444
SOUTH PASS 9040 2.1 .4 525 2.5 .6 417
WINDY PEAK 7900 1.2 .1 1200 1.5 .5 300
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Basin wide percent of average 383 323
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 1.1 .5 220
DIVIDE PEAK 8880 1.3 .5 260 2.4 .8 300
OLD BATTLE 10000 3.8 .8 475 3.8 1.0 380
SANDSTONE RS 8150 -M .0 * 1.1 .6 183
WHISKEY PARK 8950 -M .4 * 3.2 .9 356
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Basin wide percent of average 392* 305
UPPER GREEN RIVER
BIG SANDY OPENING 9080 1.6 .3 533 1.3 .6 217
BLIND BULL SUM 8650 1.7 .2 850 1.4 .6 233
EAST RIM DIVIDE 7930 1.1 .0 1.5 .4 375
ELKHART PARK G.S. 9400 1.5 .1 1500 1.4 .6 233
GROS VENTRE SUMMIT 8750 1.4 .4 350 1.4 .6 233
GUNSIGHT PASS 9820 1.5 -M * 1.9 -M *
KENDALL R.S. 7740 1.0 .0 1.4 .5 280
LOOMIS PARK 8240 1.3 .1 1300 1.6 .6 267
NEW FORK LAKE 8340 .7 .0 1.0 .5 200
SNIDER BASIN 8060 1.4 .1 1400 1.5 .4 375
SPRING CREEK DIVIDE 9000 2.0 .1 2000 2.1 .7 300
TRIPLE PEAK 8500 2.0 .1 2000 2.3 .7 329
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Basin wide percent of average 921 273
LOWER GREEN RIVER
HAMS FORK 7840 .9 .0 1.3 .4 325
HEWINTA 9519 .0 .3 0 1.0 .7 143
HICKERSON PARK 9145 .1 .0 .8 .5 160
HOLE-IN-ROCK 9150 .1 .0 .7 .5 140
INDIAN CREEK 9425 2.3 .3 767 2.2 .7 314
KELLEY R.S. 8180 1.3 .1 1300 1.4 .6 233
STEEL CREEK PARK 10200 .5 .6 83 .9 .7 129
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Basin wide percent of average 315 202
UPPER BEAR RIVER
BUG LAKE 7950 .9 .4 225 1.0 .7 143
HAYDEN FORK 9212 .1 .3 33 1.3 .7 186
KELLEY R.S. 8180 1.3 .1 1300 1.4 .6 233
LILY LAKE 9156 .0 .3 0 .9 .7 129
MONTE CRISTO 8960 1.5 .5 300 1.3 .9 144
SALT RIVER SUMMIT 7760 .7 .0 1.1 .6 183
TRIAL LAKE 9992 1.3 .6 217 1.2 .8 150
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Basin wide percent of average 232 164
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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.