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 5 , 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 .3 .2 150
COTTONWOOD CREEK 7670 .8 .0 .4 .3 133
GRAND TARGHEE 9260 1.7 -M * .6 -M *
GRANITE CREEK 6770 .3 .0 .2 .2 100
GRASSY LAKE 7265 .3 .0 .4 .3 133
GROS VENTRE SUMMIT 8750 .5 .1 500 .5 .2 250
GUNSIGHT PASS 9820 .2 -M * .6 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 .2 .2 100
PHILLIPS BENCH 8200 .1 .0 .2 .2 100
SALT RIVER SUMMIT 7760 .5 .0 .5 .2 250
SNAKE RIVER STATION 6920 .1 .0 .2 .2 100
SPRING CREEK DIVIDE 9000 .9 .0 .7 .2 350
THUMB DIVIDE 7980 .2 .0 .4 .2 200
TOGWOTEE PASS 9580 1.0 .2 500 .4 .3 133
TWO OCEAN PLATEAU 9240 .8 .2 400 .2 .3 67
WILLOW CREEK 8380 .9 .0 .6 .3 200
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Basin wide percent of average 460* 158
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .6 .6 100 .1 .2 50
BLACK BEAR 8170 .3 .4 75 .3 .3 100
CANYON 7870 .2 .1 200 .2 .2 100
FISHER CREEK 9100 .4 .4 100 .2 .3 67
MADISON PLATEAU 7750 .3 .2 150 .4 .2 200
NORTHEAST ENTRANCE 7350 .0 .0 100 .1 .2 50
PARKER PEAK 9400 -M .7 * .1 .2 50
SYLVAN LAKE 8420 .1 .5 20 .1 .2 50
THUMB DIVIDE 7980 .2 .0 .4 .2 200
TWO OCEAN PLATEAU 9240 .8 .2 400 .2 .3 67
WHISKEY CREEK 6800 .3 .1 300 .3 .2 150
WHITE MILL 8700 .3 .3 100 .1 .3 33
WOLVERINE 7650 .3 .1 300 .2 .2 100
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Basin wide percent of average 124 90
WIND RIVER
BURROUGHS CREEK 8750 .7 .2 350 .6 .2 300
COLD SPRINGS 9630 1.3 .2 650 1.4 .2 700
DEER PARK 9700 1.2 .4 300 1.3 .2 650
HOBBS PARK 10100 2.0 .5 400 -M .2 *
LITTLE WARM 9370 .6 .2 300 .5 .2 250
SOUTH PASS 9040 1.1 .3 367 1.4 .2 700
ST. LAWRENCE ALT 8620 -M .2 * 1.5 .2 750
TOGWOTEE PASS 9580 1.0 .2 500 .4 .3 133
TOWNSEND CREEK 8700 1.7 .2 850 1.8 .2 900
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Basin wide percent of average 436 524
BIGHORN BASIN
BALD MTN. 9380 1.1 .8 138 .5 .2 250
BEAR TRAP MEADOW 8200 .7 .2 350 .7 .2 350
BLACKWATER 9780 .9 .8 112 .5 .3 167
BONE SPRINGS DIV 9350 .4 .7 57 .4 .3 133
EVENING STAR 9200 .7 .7 100 .5 .2 250
GRAVE SPRINGS 8550 1.5 .2 750 -M .2 *
KIRWIN 9550 1.2 .5 240 .7 .2 350
MARQUETTE 8760 1.6 .5 320 .6 .2 300
MIDDLE POWDER 7760 1.6 .3 533 .6 .3 200
OWL CREEK 8975 -M .3 * .9 .1 900
POWDER RIVER PASS 9480 .4 .4 100 .3 .2 150
SHELL CREEK 9580 .7 .9 78 .3 .2 150
SYLVAN LAKE 8420 .1 .5 20 .1 .2 50
SYLVAN ROAD 7120 .2 .0 .1 .2 50
TIMBER CREEK 7950 .7 .1 700 .8 .2 400
YOUNTS PEAK 8350 .2 .2 100 .3 .2 150
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Basin wide percent of average 174 228
SHOSHONE RIVER
BLACKWATER 9780 .9 .8 112 .5 .3 167
EVENING STAR 9200 .7 .7 100 .5 .2 250
KIRWIN 9550 1.2 .5 240 .7 .2 350
MARQUETTE 8760 1.6 .5 320 .6 .2 300
SYLVAN LAKE 8420 .1 .5 20 .1 .2 50
SYLVAN ROAD 7120 .2 .0 .1 .2 50
YOUNTS PEAK 8350 .2 .2 100 .3 .2 150
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Basin wide percent of average 147 187
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .7 .2 350 .7 .2 350
BIG GOOSE 7990 .3 .1 300 .3 .2 150
BONE SPRINGS DIV 9350 .4 .7 57 .4 .3 133
BURGESS JUNCTION 7880 .9 .4 225 .5 .2 250
CLOUD PEAK RESERVOIR 9860 1.0 .2 500 .7 .3 233
DOME LAKE 8880 .3 .4 75 .3 .2 150
GRAVE SPRINGS 8550 1.5 .2 750 -M .2 *
HANSEN SAWMILL 8360 .7 .2 350 .6 .2 300
MIDDLE POWDER 7760 1.6 .3 533 .6 .3 200
POWDER RIVER PASS 9480 .4 .4 100 .3 .2 150
SUCKER CREEK 8880 1.0 .3 333 .6 .3 200
TIE CREEK 6870 -M .1 * .9 .3 300
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Basin wide percent of average 259 219
BELLE FOURCHE
BLIND PARK 6890 .6 .0 1.1 .2 550
COLE CANYON 5910 1.0 .0 1.4 .2 700
NORTH RAPID CREEK 6130 .4 .0 .9 .2 450
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Basin wide percent of average * 567
UPPER N. PLATTE RIVER
COLUMBINE 9160 .2 .0 .8 .2 400
DIVIDE PEAK 8880 .6 .2 300 1.4 .2 700
ELK RIVER 8700 .0 .0 100 .6 .2 300
JOE WRIGHT 10120 .2 .2 100 .4 .3 133
NORTH FRENCH CREEK 10130 1.5 .3 500 1.3 .3 433
OLD BATTLE 10000 1.8 .4 450 1.4 .3 467
SAGE CREEK BASIN 7850 .2 .0 1.0 .1 1000
SOUTH BRUSH CREEK 8440 .2 .0 1.2 .2 600
TOWER 10500 1.8 .2 900 1.3 .3 433
WEBBER SPRINGS 9250 .3 .2 150 .9 .3 300
WILLOW CREEK PASS 9540 .1 .0 .4 .2 200
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Basin wide percent of average 413 412
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .8 .3 267 .8 .2 400
CASPER MTN. 7900 .5 .1 500 .9 .2 450
DEADMAN HILL 10220 .0 .4 0 .3 .2 150
DEER PARK 9700 1.2 .4 300 1.3 .2 650
LAPRELE CREEK 8375 .2 .1 200 .5 .2 250
RENO HILL 8400 .5 .2 250 .6 .2 300
ROACH 9700 .4 .1 400 .8 .2 400
SAND LAKE 10050 1.4 .5 280 1.1 .2 550
SOUTH PASS 9040 1.1 .3 367 1.4 .2 700
WINDY PEAK 7900 .2 .0 .4 .2 200
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Basin wide percent of average 254 405
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 .8 .1 800
DIVIDE PEAK 8880 .6 .2 300 1.4 .2 700
OLD BATTLE 10000 1.8 .4 450 1.4 .3 467
SANDSTONE RS 8150 -M .0 * .5 .2 250
WHISKEY PARK 8950 .6 .1 600 1.0 .3 333
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Basin wide percent of average 429 464
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .7 .0 .6 .2 300
BLIND BULL SUM 8650 .6 .0 .6 .2 300
EAST RIM DIVIDE 7930 .4 .0 .7 .1 700
ELKHART PARK G.S. 9400 .9 .0 .6 .2 300
GROS VENTRE SUMMIT 8750 .5 .1 500 .5 .2 250
GUNSIGHT PASS 9820 .2 -M * .6 -M *
KENDALL R.S. 7740 .5 .0 .5 .1 500
LOOMIS PARK 8240 .8 .0 .7 .2 350
NEW FORK LAKE 8340 .3 .0 .4 .2 200
SNIDER BASIN 8060 .9 .0 .8 .1 800
SPRING CREEK DIVIDE 9000 .9 .0 .7 .2 350
TRIPLE PEAK 8500 1.1 .0 1.1 .2 550
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Basin wide percent of average 500* 379
LOWER GREEN RIVER
HAMS FORK 7840 .6 .0 .6 .1 600
HEWINTA 9519 .2 .1 200 .6 .2 300
HICKERSON PARK 9145 .2 .0 .6 .2 300
HOLE-IN-ROCK 9150 .4 .0 .7 .2 350
INDIAN CREEK 9425 1.2 .1 1200 1.2 .2 600
KELLEY R.S. 8180 .7 .0 .6 .2 300
STEEL CREEK PARK 10200 .7 .4 175 .6 .2 300
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Basin wide percent of average 350* 377
UPPER BEAR RIVER
BUG LAKE 7950 .6 .2 300 .6 .2 300
HAYDEN FORK 9212 .3 .2 150 .7 .2 350
KELLEY R.S. 8180 .7 .0 .6 .2 300
LILY LAKE 9156 .3 .2 150 .5 .2 250
MONTE CRISTO 8960 1.3 .3 433 .7 .3 233
SALT RIVER SUMMIT 7760 .5 .0 .5 .2 250
TRIAL LAKE 9992 1.0 .4 250 .8 .2 400
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Basin wide percent of average 269 293
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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.