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 WEDNESDAY: OCTOBER 7 , 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 .1 .0 .5 .3 167
COTTONWOOD CREEK 7670 .4 .0 1.0 .4 250
GRAND TARGHEE 9260 2.2 -M * 1.2 -M *
GRANITE CREEK 6770 .4 .0 .5 .3 167
GRASSY LAKE 7265 .5 .0 .5 .5 100
GROS VENTRE SUMMIT 8750 .7 .2 350 .7 .3 233
GUNSIGHT PASS 9820 .9 -M * 1.2 -M *
LEWIS LAKE DIVIDE 7850 .1 .0 .4 .4 100
PHILLIPS BENCH 8200 .4 .0 .6 .3 200
SALT RIVER SUMMIT 7760 .3 .0 .6 .3 200
SNAKE RIVER STATION 6920 .0 .0 100 .4 .3 133
SPRING CREEK DIVIDE 9000 1.2 .0 1.1 .3 367
THUMB DIVIDE 7980 .5 .0 1.0 .3 333
TOGWOTEE PASS 9580 1.4 .3 467 1.0 .4 250
TWO OCEAN PLATEAU 9240 1.0 .4 250 .4 .4 100
WILLOW CREEK 8380 1.8 .0 1.6 .6 267
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Basin wide percent of average 344* 202
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .9 .7 129 .3 .3 100
BLACK BEAR 8170 .7 .4 175 .6 .4 150
CANYON 7870 .3 .1 300 .5 .2 250
FISHER CREEK 9100 .4 .5 80 .3 .4 75
MADISON PLATEAU 7750 .6 .3 200 .7 .4 175
NORTHEAST ENTRANCE 7350 .0 .0 100 .1 .3 33
PARKER PEAK 9400 .3 .8 37 .3 .4 75
SYLVAN LAKE 8420 .0 .6 0 .3 .4 75
THUMB DIVIDE 7980 .5 .0 1.0 .3 333
TWO OCEAN PLATEAU 9240 1.0 .4 250 .4 .4 100
WHISKEY CREEK 6800 .4 .1 400 .6 .3 200
WHITE MILL 8700 .0 .3 0 .1 .4 25
WOLVERINE 7650 .0 .1 0 .3 .3 100
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Basin wide percent of average 107 122
WIND RIVER
BURROUGHS CREEK 8750 1.1 .2 550 1.0 .3 333
COLD SPRINGS 9630 1.5 .3 500 1.7 .3 567
DEER PARK 9700 1.6 .6 267 1.9 .3 633
HOBBS PARK 10100 2.5 .6 417 2.2 .3 733
LITTLE WARM 9370 1.0 .2 500 .9 .3 300
SOUTH PASS 9040 1.5 .4 375 1.8 .3 600
ST. LAWRENCE ALT 8620 1.5 .2 750 1.9 .3 633
TOGWOTEE PASS 9580 1.4 .3 467 1.0 .4 250
TOWNSEND CREEK 8700 2.0 .2 1000 2.2 .3 733
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Basin wide percent of average 470 521
BIGHORN BASIN
BALD MTN. 9380 1.3 .9 144 .9 .4 225
BEAR TRAP MEADOW 8200 1.0 .2 500 1.0 .3 333
BLACKWATER 9780 1.2 .9 133 .7 .4 175
BONE SPRINGS DIV 9350 .7 .7 100 .8 .4 200
EVENING STAR 9200 .9 .7 129 .9 .4 225
GRAVE SPRINGS 8550 1.9 .3 633 1.8 .4 450
KIRWIN 9550 1.5 .5 300 1.0 .3 333
MARQUETTE 8760 2.2 .6 367 1.3 .4 325
MIDDLE POWDER 7760 2.5 .3 833 1.4 .4 350
OWL CREEK 8975 1.6 .3 533 1.0 .2 500
POWDER RIVER PASS 9480 .8 .4 200 .7 .4 175
SHELL CREEK 9580 1.1 1.0 110 .8 .4 200
SYLVAN LAKE 8420 .0 .6 0 .3 .4 75
SYLVAN ROAD 7120 .0 .0 100 .2 .3 67
TIMBER CREEK 7950 .9 .2 450 1.1 .3 367
YOUNTS PEAK 8350 .6 .2 300 .6 .3 200
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Basin wide percent of average 233 254
SHOSHONE RIVER
BLACKWATER 9780 1.2 .9 133 .7 .4 175
EVENING STAR 9200 .9 .7 129 .9 .4 225
KIRWIN 9550 1.5 .5 300 1.0 .3 333
MARQUETTE 8760 2.2 .6 367 1.3 .4 325
SYLVAN LAKE 8420 .0 .6 0 .3 .4 75
SYLVAN ROAD 7120 .0 .0 100 .2 .3 67
YOUNTS PEAK 8350 .6 .2 300 .6 .3 200
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Basin wide percent of average 183 200
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.0 .2 500 1.0 .3 333
BIG GOOSE 7990 .7 .1 700 .8 .4 200
BONE SPRINGS DIV 9350 .7 .7 100 .8 .4 200
BURGESS JUNCTION 7880 1.1 .4 275 1.0 .4 250
CLOUD PEAK RESERVOIR 9860 1.1 .2 550 1.3 .4 325
DOME LAKE 8880 .7 .4 175 .9 .4 225
GRAVE SPRINGS 8550 1.9 .3 633 1.8 .4 450
HANSEN SAWMILL 8360 .9 .1 900 .8 .3 267
MIDDLE POWDER 7760 2.5 .3 833 1.4 .4 350
POWDER RIVER PASS 9480 .8 .4 200 .7 .4 175
SUCKER CREEK 8880 1.4 .3 467 1.1 .4 275
TIE CREEK 6870 1.3 .1 1300 1.4 .5 280
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Basin wide percent of average 403 277
BELLE FOURCHE
BLIND PARK 6890 .7 .4 175 1.5 .4 375
COLE CANYON 5910 1.6 .0 2.3 .3 767
NORTH RAPID CREEK 6130 .6 .0 1.3 .4 325
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Basin wide percent of average 175* 464
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 .7 .3 233
DIVIDE PEAK 8880 .4 .3 133 1.5 .4 375
ELK RIVER 8700 .0 .0 100 .8 .3 267
JOE WRIGHT 10120 .6 .3 200 .7 .5 140
NORTH FRENCH CREEK 10130 1.5 .5 300 1.6 .4 400
OLD BATTLE 10000 2.1 .5 420 1.8 .5 360
SAGE CREEK BASIN 7850 .0 .0 100 1.1 .2 550
SOUTH BRUSH CREEK 8440 .0 .0 100 1.3 .4 325
TOWER 10500 2.2 .3 733 1.7 .5 340
WEBBER SPRINGS 9250 .5 .2 250 1.3 .4 325
WILLOW CREEK PASS 9540 .2 .0 .4 .3 133
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Basin wide percent of average 348 307
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .8 .4 200 1.1 .3 367
CASPER MTN. 7900 .4 .2 200 1.0 .3 333
DEADMAN HILL 10220 .0 .4 0 .4 .4 100
DEER PARK 9700 1.6 .6 267 1.9 .3 633
LAPRELE CREEK 8375 .1 .1 100 .6 .3 200
RENO HILL 8400 .4 .3 133 .7 .3 233
ROACH 9700 .3 .1 300 .9 .4 225
SAND LAKE 10050 1.6 .6 267 1.4 .4 350
SOUTH PASS 9040 1.5 .4 375 1.8 .3 600
WINDY PEAK 7900 .2 .0 .6 .3 200
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Basin wide percent of average 216 315
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 .9 .2 450
DIVIDE PEAK 8880 .4 .3 133 1.5 .4 375
OLD BATTLE 10000 2.1 .5 420 1.8 .5 360
SANDSTONE RS 8150 -M .0 * .7 .3 233
WHISKEY PARK 8950 .8 .2 400 1.4 .4 350
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Basin wide percent of average 330 350
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .9 .1 900 .7 .3 233
BLIND BULL SUM 8650 .9 .0 .9 .3 300
EAST RIM DIVIDE 7930 .8 .0 1.0 .2 500
ELKHART PARK G.S. 9400 1.3 .0 1.0 .3 333
GROS VENTRE SUMMIT 8750 .7 .2 350 .7 .3 233
GUNSIGHT PASS 9820 .9 -M * 1.2 -M *
KENDALL R.S. 7740 .6 .0 .9 .2 450
LOOMIS PARK 8240 .9 .0 1.0 .3 333
NEW FORK LAKE 8340 .6 .0 .8 .3 267
SNIDER BASIN 8060 .7 .0 .8 .2 400
SPRING CREEK DIVIDE 9000 1.2 .0 1.1 .3 367
TRIPLE PEAK 8500 1.2 .0 1.4 .3 467
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Basin wide percent of average 533* 343
LOWER GREEN RIVER
HAMS FORK 7840 .3 .0 .6 .2 300
HEWINTA 9519 -M .1 * .7 .3 233
HICKERSON PARK 9145 .0 .0 100 .6 .3 200
HOLE-IN-ROCK 9150 .0 .0 100 .7 .3 233
INDIAN CREEK 9425 1.2 .1 1200 1.2 .3 400
KELLEY R.S. 8180 .6 .0 .5 .3 167
STEEL CREEK PARK 10200 .4 .4 100 .8 .3 267
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Basin wide percent of average 320 255
UPPER BEAR RIVER
BUG LAKE 7950 .5 .3 167 .6 .3 200
HAYDEN FORK 9212 .1 .2 50 1.0 .4 250
KELLEY R.S. 8180 .6 .0 .5 .3 167
LILY LAKE 9156 -M .2 * .7 .3 233
MONTE CRISTO 8960 1.0 .3 333 1.0 .4 250
SALT RIVER SUMMIT 7760 .3 .0 .6 .3 200
TRIAL LAKE 9992 1.0 .5 200 1.0 .4 250
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Basin wide percent of average 200 225
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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.