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 4 , 2002
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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* .3 .2 150
COTTONWOOD CREEK 7600 .1 .0 * .5 .3 167
GRANITE CREEK 6770 .2 .0 * .7 .2 350
GRASSY LAKE 7265 .0 .1 0* .4 .3 133
GROS VENTRE SUMMIT 8775 .7 .1 700* .7 .2 350
LEWIS LAKE DIVIDE 7860 .0 .0 100* .2 .3 67
PHILLIPS BENCH 8200 .5 .0 * .7 .2 350
SALT RIVER SUMMIT 7600 .3 .0 * .6 .2 300
SNAKE RIVER STATION 6920 -M .0 * .2 .2 100
SPRING CREEK DIVIDE 9000 .6 .1 600* .6 .3 200
THUMB DIVIDE 7980 .2 .0 * .6 .2 300
TOGWOTEE PASS 9580 .6 .2 300* .4 .3 133
TWO OCEAN PLATEAU 9360 .6 .3 200* .3 .3 100
WILLOW CREEK 8450 .0 .1 0* .5 .4 125
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Basin wide percent of average 278* 186
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 .8 .6 133* .5 .2 250
BLACK BEAR 8170 .7 .4 175* .6 .3 200
CANYON 8090 .2 .1 200* .4 .2 200
FISHER CREEK 9100 .6 .4 150* .4 .3 133
MADISON PLATEAU 7750 .6 .2 300* .5 .3 167
NORTHEAST ENTRANCE 7350 .1 .0 * .2 .2 100
PARKER PEAK 9400 .3 .6 50* .6 .2 300
SYLVAN LAKE 8420 .3 .5 60* .3 .3 100
THUMB DIVIDE 7980 .2 .0 * .6 .2 300
TWO OCEAN PLATEAU 9360 .6 .3 200* .3 .3 100
WHISKEY CREEK 6800 .4 .1 400* .3 .2 150
WHITE MILL 8700 .4 .3 133* .3 .3 100
WOLVERINE 7650 .1 .0 * .4 .2 200
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Basin wide percent of average 140* 169
WIND RIVER
BURROUGHS CREEK 8750 .6 .2 300* .9 .2 450
COLD SPRINGS 9630 1.0 .2 500* 1.3 .2 650
DEER PARK 9700 .7 .4 175* .6 .3 200
HOBBS PARK 10100 1.7 .4 425* 1.5 .2 750
LITTLE WARM 9370 .8 .2 400* .5 .2 250
SOUTH PASS 9040 .5 .2 250* .6 .2 300
ST. LAWRENCE ALT 8620 1.5 .1 1500* 1.6 .2 800
TOGWOTEE PASS 9580 .6 .2 300* .4 .3 133
TOWNSEND CREEK 8700 1.0 .1 1000* 1.2 .2 600
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Basin wide percent of average 420* 430
BIGHORN BASIN
BALD MTN. 9380 .6 .8 75* .5 .2 250
BEAR TRAP MEADOW 8200 .1 .1 100* .4 .2 200
BLACKWATER 9780 .8 .8 100* .7 .3 233
BONE SPRINGS DIV 9350 .5 .7 71* .5 .3 167
EVENING STAR 9200 .4 .6 67* .4 .3 133
GRAVE SPRINGS 8550 .5 .1 500* .5 .2 250
KIRWIN 9550 .7 .5 140* .9 .2 450
MARQUETTE 8760 .7 .5 140* 1.1 .2 550
MIDDLE POWDER 7760 .1 .3 33* .4 .3 133
OWL CREEK 8975 1.0 .2 500* .9 .1 900
POWDER RIVER PASS 9480 .3 .3 100* .5 .2 250
SHELL CREEK 9580 .4 .9 44* .4 .2 200
SYLVAN LAKE 8420 .3 .5 60* .3 .3 100
SYLVAN ROAD 7120 .1 .0 * .1 .2 50
TIMBER CREEK 7950 .8 .0 * .9 .2 450
YOUNTS PEAK 8350 .3 .2 150* .4 .2 200
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Basin wide percent of average 103* 247
SHOSHONE RIVER
BLACKWATER 9780 .8 .8 100* .7 .3 233
EVENING STAR 9200 .4 .6 67* .4 .3 133
KIRWIN 9550 .7 .5 140* .9 .2 450
MARQUETTE 8760 .7 .5 140* 1.1 .2 550
SYLVAN LAKE 8420 .3 .5 60* .3 .3 100
SYLVAN ROAD 7120 .1 .0 * .1 .2 50
YOUNTS PEAK 8350 .3 .2 150* .4 .2 200
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Basin wide percent of average 103* 229
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .1 100* .4 .2 200
BIG GOOSE 7990 .4 .1 400* .6 .2 300
BONE SPRINGS DIV 9350 .5 .7 71* .5 .3 167
BURGESS JUNCTION 7880 .6 .4 150* .7 .2 350
CLOUD PEAK RESERVOIR 9860 .2 .2 100* .6 .3 200
DOME LAKE 8880 .4 .4 100* .5 .3 167
GRAVE SPRINGS 8550 .5 .1 500* .5 .2 250
HANSEN SAWMILL 8360 .5 .1 500* .6 .2 300
MIDDLE POWDER 7760 .1 .3 33* .4 .3 133
POWDER RIVER PASS 9480 .3 .3 100* .5 .2 250
SUCKER CREEK 8880 .6 .3 200* .6 .2 300
TIE CREEK 6870 .3 .0 * .7 .3 233
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Basin wide percent of average 140* 228
BELLE FOURCHE
BLIND PARK 6890 .2 .0 * .5 .3 167
COLE CANYON 5910 -M -M * .1 -M *
NORTH RAPID CREEK 6130 .1 .0 * .4 .3 133
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Basin wide percent of average * 150
UPPER N. PLATTE RIVER
COLUMBINE 9400 .8 .0 * 1.2 .2 600
DIVIDE PEAK 8800 .6 .2 300* 1.6 .3 533
ELK RIVER 8700 .2 .0 * 1.1 .2 550
JOE WRIGHT 10120 .4 .2 200* 1.1 .3 367
NORTH FRENCH CREEK 10100 1.3 .4 325* 1.4 .3 467
OLD BATTLE 10000 1.7 .4 425* 1.4 .4 350
SAGE CREEK BASIN 7850 .1 .1 100* 1.3 -M *
SOUTH BRUSH CREEK 8400 .8 .0 * 1.1 .3 367
TOWER 10500 -M .3 * 2.2 .4 550
WEBBER SPRINGS 9200 .5 .2 250* 1.0 .3 333
WILLOW CREEK PASS 9540 .0 .1 0* .5 .2 250
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Basin wide percent of average 287* 434
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .3 .4 75* .9 .3 300
CASPER MTN. 7900 .0 .1 0* .8 .3 267
DEADMAN HILL 10220 .1 .4 25* .3 .3 100
DEER PARK 9700 .7 .4 175* .6 .3 200
LAPRELE CREEK 8320 1.0 .1 1000* .8 .2 400
RENO HILL 8400 .9 .2 450* 1.1 .3 367
ROACH 9700 .5 .1 500* .7 .2 350
SAND LAKE 10080 .7 .6 117* 1.1 .3 367
SOUTH PASS 9040 .5 .2 250* .6 .2 300
WINDY PEAK 7840 -M .0 * .8 .2 400
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Basin wide percent of average 188* 296
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 1.7 .2 850
DIVIDE PEAK 8800 .6 .2 300* 1.6 .3 533
OLD BATTLE 10000 1.7 .4 425* 1.4 .4 350
SANDSTONE RS 8150 .0 .0 100* 1.4 .2 700
WHISKEY PARK 8950 -M .1 * 1.4 .3 467
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Basin wide percent of average 383* 536
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .7 .1 700* .6 .2 300
BLIND BULL SUM 8650 .3 .1 300* .5 .2 250
EAST RIM DIVIDE 7930 .6 .0 * .9 .1 900
ELKHART PARK G.S. 9400 1.2 .0 * 1.0 .2 500
GROS VENTRE SUMMIT 8775 .7 .1 700* .7 .2 350
KENDALL R.S. 7740 .3 .0 * .7 .2 350
LOOMIS PARK 8240 .6 .0 * .8 .2 400
NEW FORK LAKE 8340 .5 .0 * .8 .2 400
SNIDER BASIN 8250 .7 .0 * .7 .2 350
SPRING CREEK DIVIDE 9000 .6 .1 600* .6 .3 200
TRIPLE PEAK 8500 .2 .0 * .8 .2 400
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Basin wide percent of average 575* 368
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* .8 .1 800
HEWINTA 9500 .0 .1 0* .8 .2 400
HICKERSON PARK 9150 .6 .0 * 1.1 .2 550
HOLE-IN-ROCK 9150 .0 .0 100* 1.0 .2 500
INDIAN CREEK 9425 1.1 .1 1100* 1.0 .3 333
KELLEY R.S. 8180 .3 .0 * .4 .2 200
STEEL CREEK PARK 10100 1.0 .4 250* .3 .2 150
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Basin wide percent of average 350* 386
UPPER BEAR RIVER
BUG LAKE 7950 .4 .3 133* .9 .2 450
HAYDEN FORK 9400 .1 .2 50* 1.4 .2 700
KELLEY R.S. 8180 .3 .0 * .4 .2 200
LILY LAKE 9050 1.0 .2 500* 1.2 .2 600
MONTE CRISTO 8960 -M .3 * .8 .3 267
SALT RIVER SUMMIT 7600 .3 .0 * .6 .2 300
TRIAL LAKE 9960 1.1 .4 275* 1.4 .3 467
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Basin wide percent of average 236* 419
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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 1971-2000.
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.