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 27 , 1997
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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 .2 .5 40* 1.7 1.7 100
COTTONWOOD CREEK 7600 .6 .5 120* 2.3 1.8 128
GRANITE CREEK 6770 .2 .4 50* .6 1.9 32
GRASSY LAKE 7265 .9 .8 112* 2.9 2.8 104
GROS VENTRE SUMMIT 8775 2.6 .8 325* 1.1 1.3 85
LEWIS LAKE DIVIDE 7860 .6 1.0 60* 2.1 2.9 72
PHILLIPS BENCH 8200 .6 .8 75* 1.7 2.2 77
SALT RIVER SUMMIT 7600 .3 .0 * 2.0 1.4 143
SNAKE RIVER STATION 6920 -M .4 * -M 1.9 *
SPRING CREEK DIVIDE 9000 .4 1.0 40* 1.4 1.8 78
THUMB DIVIDE 7980 -M .4 * -M 1.6 *
TOGWOTEE PASS 9580 2.2 1.9 116* 2.0 2.1 95
TWO OCEAN PLATEAU 9360 2.8 2.9 97 2.7 2.3 117
WILLOW CREEK 8450 .6 .8 75* 3.5 2.3 152
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Basin wide percent of average 103* 98
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 2.0 2.6 77* 1.7 1.6 106
BLACK BEAR 7950 2.9 2.3 126* 3.6 2.9 124
CANYON 7940 1.3 .6 217* 2.8 1.5 187
FISHER CREEK 9100 2.2 2.1 105* 2.3 2.5 92
MADISON PLATEAU 7750 1.5 1.2 125* 2.6 2.1 124
NORTHEAST ENTRANCE 7350 .1 .2 50* 1.8 1.3 138
PARKER PEAK 9400 2.2 3.1 71 2.5 1.8 139
SYLVAN LAKE 8420 1.8 2.1 86* -M 2.2 *
THUMB DIVIDE 7980 -M .4 * -M 1.6 *
TWO OCEAN PLATEAU 9360 2.8 2.9 97 2.7 2.3 117
WHISKEY CREEK 6800 .5 .6 83* 2.0 1.8 111
WHITE MILL 8700 1.9 1.6 119* 2.2 2.3 96
WOLVERINE 7650 .2 .2 100* 2.0 1.3 154
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Basin wide percent of average 99* 122
WIND RIVER
BURROUGHS CREEK 8750 1.1 .7 157* 1.5 1.3 115
COLD SPRINGS 9630 1.9 .7 271* 2.4 1.6 150
DEER PARK 9700 .0 -M * .0 -M *
HOBBS PARK 10100 2.4 1.7 141* 2.7 1.7 159
LITTLE WARM 9620 .9 .8 112* 2.1 1.5 140
SOUTH PASS 9040 1.7 2.2 77 2.7 1.8 150
ST. LAWRENCE ALT 8620 2.0 .7 286* 2.4 1.4 171
TOGWOTEE PASS 9580 2.2 1.9 116* 2.0 2.1 95
TOWNSEND CREEK 8700 1.9 .8 238* 2.9 1.6 181
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Basin wide percent of average 148* 144
BIGHORN BASIN
BALD MTN. 9375 2.7 2.2 123* 2.8 1.9 147
BEAR TRAP MEADOW 7900 .5 .6 83* 1.5 1.3 115
BLACKWATER 9780 2.6 2.1 124* 2.6 2.0 130
BONE SPRINGS DIV 9350 2.3 2.4 96 2.7 1.8 150
EVENING STAR 9200 1.9 3.2 59 3.3 2.4 138
GRAVE SPRINGS 8550 .7 -M * 1.7 1.6 106
KIRWIN 9550 -M 1.3 * -M 1.3 *
LOST CREEK 8080 -M 1.1 * -M 1.7 *
MARQUETTE 8760 3.8 .9 422* 4.2 1.5 280
MIDDLE POWDER 7760 .8 1.1 73* 1.8 1.8 100
OWL CREEK 8975 1.3 .5 260 1.6 .8 200
POWDER RIVER PASS 9480 .4 1.0 40* 1.3 1.6 81
SHELL CREEK 9580 2.1 2.2 95 1.6 1.6 100
SYLVAN LAKE 8420 1.8 2.1 86* -M 2.2 *
SYLVAN ROAD 8120 .2 1.3 15 2.0 1.8 111
TIMBER CREEK 7950 2.3 .2 1150* 3.1 1.1 282
YOUNTS PEAK 8350 2.2 1.9 116 1.5 1.6 94
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Basin wide percent of average 115* 139
SHOSHONE RIVER
BLACKWATER 9780 2.6 2.1 124* 2.6 2.0 130
EVENING STAR 9200 1.9 3.2 59 3.3 2.4 138
KIRWIN 9550 -M 1.3 * -M 1.3 *
MARQUETTE 8760 3.8 .9 422* 4.2 1.5 280
SYLVAN LAKE 8420 1.8 2.1 86* -M 2.2 *
SYLVAN ROAD 8120 .2 1.3 15 2.0 1.8 111
YOUNTS PEAK 8350 2.2 1.9 116 1.5 1.6 94
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Basin wide percent of average 109* 146
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .5 .6 83* 1.5 1.3 115
BONE SPRINGS DIV 9350 2.3 2.4 96 2.7 1.8 150
BURGESS JUNCTION 7880 .9 1.3 69* 2.3 1.7 135
CLOUD PEAK RESERVOIR 9860 1.1 1.1 100* 3.1 1.8 172
DOME LAKE 8880 1.9 1.6 119 2.9 1.9 153
GRAVE SPRINGS 8550 .7 -M * 1.7 1.6 106
HANSEN SAWMILL 8760 1.1 .7 157* 2.0 1.3 154
LOST CREEK 8080 -M 1.1 * -M 1.7 *
MIDDLE POWDER 7760 .8 1.1 73* 1.8 1.8 100
POWDER RIVER PASS 9480 .4 1.0 40* 1.3 1.6 81
SUCKER CREEK 8880 1.4 1.0 140* 3.1 1.8 172
TIE CREEK 6870 1.6 -M * 2.9 1.6 181
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Basin wide percent of average 96* 139
BELLE FOURCHE
BLIND PARK 6890 .4 1.4 29 1.6 1.5 107
NORTH RAPID CREEK 6130 .6 -M * 1.1 -M *
WARREN PEAK 6520 .4 1.4 29 1.8 1.2 150
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Basin wide percent of average 29 126
UPPER N. PLATTE RIVER
COLUMBINE 9400 .7 1.3 54* 3.0 2.1 143
DIVIDE PEAK 8800 1.6 1.7 94* 3.1 2.6 119
ELK RIVER 8700 .5 .3 167* 2.8 1.9 147
JOE WRIGHT 10120 2.3 2.5 92 4.3 2.9 148
NORTH FRENCH CREEK 10100 1.8 1.7 106* 3.3 1.9 174
OLD BATTLE 10000 3.1 3.1 100* 4.6 2.7 170
SOUTH BRUSH CREEK 8400 .2 .3 67* 1.7 1.9 89
TOWER 10500 4.0 4.9 82* 14.6 3.4 429
WEBBER SPRINGS 9200 1.6 1.5 107* 3.8 2.5 152
WILLOW CREEK PASS 9540 1.7 .8 212* 1.7 1.5 113
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Basin wide percent of average 97* 183
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 1.3 1.6 81* 2.7 2.0 135
CASPER MTN. 7900 2.6 1.0 260* 2.6 2.1 124
DEADMAN HILL 10220 3.3 1.1 300* 2.8 2.0 140
DEER PARK 9700 .0 -M * .0 -M *
LAPRELE CREEK 8320 1.1 .7 157* 2.0 1.3 154
RENO HILL 8400 1.7 1.4 121* 2.1 2.1 100
ROACH 9700 1.6 1.1 145* 2.7 2.3 117
SAND LAKE 10080 3.4 2.5 136* 4.6 2.2 209
SOUTH PASS 9040 1.7 2.2 77 2.7 1.8 150
WINDY PEAK 7840 1.0 .1 1000* 1.9 1.0 190
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Basin wide percent of average 151* 143
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .3 0* 3.2 1.5 213
DIVIDE PEAK 8800 1.6 1.7 94* 3.1 2.6 119
OLD BATTLE 10000 3.1 3.1 100* 4.6 2.7 170
SANDSTONE RS 8150 .3 .6 50* 3.0 1.4 214
WHISKEY PARK 8950 1.3 1.8 72* 3.6 1.6 225
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Basin wide percent of average 84* 179
UPPER GREEN RIVER
BIG SANDY OPENING 9100 1.3 .5 260* 1.2 1.3 92
BLIND BULL SUM 8650 .6 1.6 38* 1.3 1.7 76
EAST RIM DIVIDE 7930 .3 .3 100* .4 1.3 31
ELKHART PARK G.S. 9400 .6 .7 86* 1.5 1.3 115
GROS VENTRE SUMMIT 8775 2.6 .8 325* 1.1 1.3 85
KENDALL R.S. 7740 .2 .0 * .8 1.3 62
LOOMIS PARK 8240 .2 .4 50* .7 1.5 47
NEW FORK LAKE 8340 .5 .0 * .9 1.2 75
SNIDER BASIN 8250 .0 .0 100* .5 1.3 38
SPRING CREEK DIVIDE 9000 .4 1.0 40* 1.4 1.8 78
TRIPLE PEAK 8500 .8 .7 114* 1.4 2.3 61
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Basin wide percent of average 113* 69
LOWER GREEN RIVER
HAMS FORK 7840 .3 .0 * .8 1.1 73
HEWINTA 9500 1.4 .2 700* 3.4 2.0 170
HICKERSON PARK 9150 3.1 .1 3100* 3.8 1.8 211
HOLE-IN-ROCK 9150 1.4 .1 1400* 3.3 1.8 183
INDIAN CREEK 9425 1.2 1.2 100* 1.2 1.9 63
KELLEY R.S. 8180 .4 .4 100* 1.1 1.5 73
STEEL CREEK PARK 10100 .9 1.6 56* 3.8 2.0 190
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Basin wide percent of average 233* 144
UPPER BEAR RIVER
BUG LAKE 7950 .7 1.0 70* 1.9 2.8 68
HAYDEN FORK 9400 .3 .7 43* 2.6 2.1 124
KELLEY R.S. 8180 .4 .4 100* 1.1 1.5 73
LILY LAKE 9050 .8 .8 100* 2.8 2.3 122
MONTE CRISTO 8960 1.1 1.2 92* 2.3 2.9 79
SALT RIVER SUMMIT 7600 .3 .0 * 2.0 1.4 143
TRIAL LAKE 9960 .8 1.5 53* 2.2 2.4 92
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Basin wide percent of average 73* 97
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-M = Missing data
* = Data may not provide a valid measure of conditions.
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.