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 THURSDAY: OCTOBER 8 , 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 .0 100 .6 .4 150
COTTONWOOD CREEK 7670 .5 .0 1.1 .5 220
GRAND TARGHEE 9260 2.4 -M * 1.5 -M *
GRANITE CREEK 6770 .4 .0 .5 .3 167
GRASSY LAKE 7265 .5 .0 .6 .6 100
GROS VENTRE SUMMIT 8750 .9 .2 450 .9 .4 225
GUNSIGHT PASS 9820 1.0 -M * 1.3 -M *
LEWIS LAKE DIVIDE 7850 -M .0 * -M .5 *
PHILLIPS BENCH 8200 .5 .0 .7 .4 175
SALT RIVER SUMMIT 7760 .4 .0 .7 .3 233
SNAKE RIVER STATION 6920 .0 .0 100 .5 .4 125
SPRING CREEK DIVIDE 9000 1.2 .0 1.2 .4 300
THUMB DIVIDE 7980 .4 .0 1.1 .4 275
TOGWOTEE PASS 9580 1.6 .4 400 1.1 .5 220
TWO OCEAN PLATEAU 9240 1.2 .5 240 .6 .5 120
WILLOW CREEK 8380 1.7 .0 1.7 .7 243
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Basin wide percent of average 336* 195
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 1.2 .8 150 .5 .4 125
BLACK BEAR 8170 .7 .5 140 .6 .5 120
CANYON 7870 .4 .1 400 .5 .3 167
FISHER CREEK 9100 .6 .5 120 .4 .5 80
MADISON PLATEAU 7750 .6 .3 200 .7 .5 140
NORTHEAST ENTRANCE 7350 .0 .0 100 .2 .3 67
PARKER PEAK 9400 -M .9 * .5 .5 100
SYLVAN LAKE 8420 .2 .5 40 .4 .5 80
THUMB DIVIDE 7980 .4 .0 1.1 .4 275
TWO OCEAN PLATEAU 9240 1.2 .5 240 .6 .5 120
WHISKEY CREEK 6800 .4 .1 400 .5 .3 167
WHITE MILL 8700 .4 .3 133 .1 .5 20
WOLVERINE 7650 .5 .1 500 .4 .4 100
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Basin wide percent of average 168 116
WIND RIVER
BURROUGHS CREEK 8750 1.3 .2 650 1.1 .3 367
COLD SPRINGS 9630 1.5 .3 500 1.7 .3 567
DEER PARK 9700 1.5 .6 250 1.8 .4 450
HOBBS PARK 10100 2.4 .6 400 -M .4 *
LITTLE WARM 9370 1.0 .2 500 1.0 .3 333
SOUTH PASS 9040 1.4 .4 350 1.8 .3 600
ST. LAWRENCE ALT 8620 1.5 .2 750 1.9 .3 633
TOGWOTEE PASS 9580 1.6 .4 400 1.1 .5 220
TOWNSEND CREEK 8700 1.9 .3 633 2.2 .4 550
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Basin wide percent of average 441 450
BIGHORN BASIN
BALD MTN. 9380 1.5 1.0 150 1.1 .5 220
BEAR TRAP MEADOW 8200 1.1 .2 550 1.2 .3 400
BLACKWATER 9780 1.3 1.0 130 .9 .5 180
BONE SPRINGS DIV 9350 1.1 .8 138 1.0 .6 167
EVENING STAR 9200 1.4 .8 175 1.3 .5 260
GRAVE SPRINGS 8550 1.8 .4 450 1.9 .5 380
KIRWIN 9550 1.5 .6 250 1.0 .3 333
MARQUETTE 8760 2.1 .6 350 1.3 .4 325
MIDDLE POWDER 7760 2.7 .4 675 1.6 .5 320
OWL CREEK 8975 1.7 .4 425 1.1 .2 550
POWDER RIVER PASS 9480 1.0 .3 333 .9 .4 225
SHELL CREEK 9580 1.7 1.0 170 1.2 .4 300
SYLVAN LAKE 8420 .2 .5 40 .4 .5 80
SYLVAN ROAD 7120 .1 .0 .3 .3 100
TIMBER CREEK 7950 1.0 .3 333 1.2 .3 400
YOUNTS PEAK 8350 .7 .3 233 .6 .4 150
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Basin wide percent of average 242 258
SHOSHONE RIVER
BLACKWATER 9780 1.3 1.0 130 .9 .5 180
EVENING STAR 9200 1.4 .8 175 1.3 .5 260
KIRWIN 9550 1.5 .6 250 1.0 .3 333
MARQUETTE 8760 2.1 .6 350 1.3 .4 325
SYLVAN LAKE 8420 .2 .5 40 .4 .5 80
SYLVAN ROAD 7120 .1 .0 .3 .3 100
YOUNTS PEAK 8350 .7 .3 233 .6 .4 150
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Basin wide percent of average 189 200
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.1 .2 550 1.2 .3 400
BIG GOOSE 7990 1.1 .1 1100 1.3 .5 260
BONE SPRINGS DIV 9350 1.1 .8 138 1.0 .6 167
BURGESS JUNCTION 7880 1.6 .5 320 1.3 .5 260
CLOUD PEAK RESERVOIR 9860 1.4 .2 700 1.3 .5 260
DOME LAKE 8880 1.2 .4 300 1.4 .5 280
GRAVE SPRINGS 8550 1.8 .4 450 1.9 .5 380
HANSEN SAWMILL 8360 1.4 .1 1400 1.2 .4 300
MIDDLE POWDER 7760 2.7 .4 675 1.6 .5 320
POWDER RIVER PASS 9480 1.0 .3 333 .9 .4 225
SUCKER CREEK 8880 1.7 .4 425 1.4 .5 280
TIE CREEK 6870 -M .1 * 1.9 .6 317
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Basin wide percent of average 424 283
BELLE FOURCHE
BLIND PARK 6890 1.0 .5 200 1.8 .5 360
COLE CANYON 5910 1.6 .0 2.4 .4 600
NORTH RAPID CREEK 6130 1.0 .0 1.8 .5 360
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Basin wide percent of average 200* 429
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 .0 1.0 .4 250
DIVIDE PEAK 8880 .5 .4 125 1.6 .5 320
ELK RIVER 8700 .1 .0 .9 .4 225
JOE WRIGHT 10120 .3 .3 100 .8 .6 133
NORTH FRENCH CREEK 10130 1.6 .6 267 1.7 .5 340
OLD BATTLE 10000 2.1 .6 350 2.0 .6 333
SAGE CREEK BASIN 7850 .0 .0 100 1.1 .3 367
SOUTH BRUSH CREEK 8440 .0 .1 0 1.4 .4 350
TOWER 10500 2.3 .4 575 2.0 .6 333
WEBBER SPRINGS 9250 .4 .2 200 1.3 .5 260
WILLOW CREEK PASS 9540 .2 .1 200 .6 .4 150
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Basin wide percent of average 274 277
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .9 .5 180 1.0 .4 250
CASPER MTN. 7900 .4 .2 200 1.0 .4 250
DEADMAN HILL 10220 .0 .5 0 .5 .5 100
DEER PARK 9700 1.5 .6 250 1.8 .4 450
LAPRELE CREEK 8375 .1 .1 100 .5 .3 167
RENO HILL 8400 .4 .3 133 .6 .4 150
ROACH 9700 .3 .1 300 .9 .4 225
SAND LAKE 10050 1.7 .7 243 1.5 .5 300
SOUTH PASS 9040 1.4 .4 350 1.8 .3 600
WINDY PEAK 7900 .1 .0 .5 .3 167
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Basin wide percent of average 197 259
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 1.9 .3 633
DIVIDE PEAK 8880 .5 .4 125 1.6 .5 320
OLD BATTLE 10000 2.1 .6 350 2.0 .6 333
SANDSTONE RS 8150 -M .0 * .7 .4 175
WHISKEY PARK 8950 .8 .2 400 1.4 .5 280
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Basin wide percent of average 283 330
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .9 .1 900 .8 .3 267
BLIND BULL SUM 8650 1.0 .1 1000 .9 .4 225
EAST RIM DIVIDE 7930 .8 .0 1.1 .3 367
ELKHART PARK G.S. 9400 1.3 .0 1.1 .4 275
GROS VENTRE SUMMIT 8750 .9 .2 450 .9 .4 225
GUNSIGHT PASS 9820 1.0 -M * 1.3 -M *
KENDALL R.S. 7740 .8 .0 .9 .3 300
LOOMIS PARK 8240 .9 .1 900 1.1 .3 367
NEW FORK LAKE 8340 .6 .0 1.0 .3 333
SNIDER BASIN 8060 .9 .0 .9 .3 300
SPRING CREEK DIVIDE 9000 1.2 .0 1.2 .4 300
TRIPLE PEAK 8500 1.3 .0 1.5 .4 375
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Basin wide percent of average 740* 300
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 .6 .2 300
HEWINTA 9519 .0 .2 0 .7 .4 175
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 1.3 .4 325
KELLEY R.S. 8180 .7 .0 .8 .3 267
STEEL CREEK PARK 10200 .4 .4 100 .8 .4 200
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Basin wide percent of average 229 239
UPPER BEAR RIVER
BUG LAKE 7950 .4 .3 133 .6 .4 150
HAYDEN FORK 9212 .0 .2 0 1.0 .4 250
KELLEY R.S. 8180 .7 .0 .8 .3 267
LILY LAKE 9156 .0 .3 0 .7 .4 175
MONTE CRISTO 8960 1.0 .4 250 1.0 .5 200
SALT RIVER SUMMIT 7760 .4 .0 .7 .3 233
TRIAL LAKE 9992 1.0 .5 200 1.0 .5 200
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Basin wide percent of average 141 207
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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.