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 SUNDAY: OCTOBER 20 , 2013
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 .1 .0 * 1.3 1.2 108
BLACK BEAR 8170 1.7 1.5 113* 2.1 2.3 91
BLIND BULL SUM 8650 .7 .4 175* 1.3 1.3 100
COTTONWOOD CREEK 7670 .5 .0 * 1.6 1.6 100
EAST RIM DIVIDE 7930 .1 .0 * 1.2 .8 150
GRAND TARGHEE 9260 2.3 3.0 77* 2.9 3.9 74
GRANITE CREEK 6770 .1 .0 * 1.1 1.2 92
GRASSY LAKE 7265 .3 .0 * 1.7 2.1 81
GROS VENTRE SUMMIT 8750 2.1 .9 233* 2.0 1.1 182
GUNSIGHT PASS 9820 2.2 .5 440* 2.5 1.4 179
LEWIS LAKE DIVIDE 7850 .0 .0 * 1.3 1.9 68
PHILLIPS BENCH 8200 .5 .0 * 1.5 1.4 107
SALT RIVER SUMMIT 7760 .0 .0 * 1.4 1.0 140
SNAKE RIVER STATION 6920 .0 .0 * 1.0 1.7 59
SPRING CREEK DIVIDE 9000 .6 .4 150* 1.1 1.3 85
THUMB DIVIDE 7980 .1 .0 * 1.2 1.4 86
TOGWOTEE PASS 9580 3.4 1.7 200* 2.4 1.6 150
TWO OCEAN PLATEAU 9240 3.3 1.9 174* 2.3 1.8 128
WILLOW CREEK 8380 .4 .0 * 2.5 2.2 114
YOUNTS PEAK 8350 -M .5 * -M 1.4 *
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Basin Index (%) 179* 104
MADISON-GALLATIN
BLACK BEAR 8170 1.7 1.5 113* 2.1 2.3 91
CANYON 7870 .4 .2 200* 1.7 1.3 131
MADISON PLATEAU 7750 .5 .5 100* 1.7 1.7 100
WEST YELLOWSTONE 6700 .1 .0 * 1.1 1.3 85
WHISKEY CREEK 6800 .3 .0 * 1.3 1.4 93
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Basin Index (%) 136* 99
YELLOWSTONE
BEARTOOTH LAKE 9360 2.6 1.5 173* 1.5 1.4 107
BURNT MTN 5880 1.9 .0 * 5.0 2.6 192
CANYON 7870 .4 .2 200* 1.7 1.3 131
COLE CREEK 7850 4.6 1.6 288* 3.7 2.2 168
EVENING STAR 9200 3.1 1.2 258* 2.5 2.0 125
FISHER CREEK 9100 3.2 1.4 229* 2.1 2.2 95
NORTHEAST ENTRANCE 7350 .1 .0 * .9 1.2 75
PARKER PEAK 9400 3.1 1.4 221* 2.2 1.8 122
SYLVAN LAKE 8420 1.1 .8 138* 2.1 2.0 105
THUMB DIVIDE 7980 .1 .0 * 1.2 1.4 86
TWO OCEAN PLATEAU 9240 3.3 1.9 174* 2.3 1.8 128
WHITE MILL 8700 2.3 1.2 192* 1.7 1.8 94
WOLVERINE 7650 .0 .0 * 1.3 1.3 100
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Basin Index (%) 230* 123
WIND RIVER
BURROUGHS CREEK 8750 -M .3 * -M 1.2 *
CASTLE CREEK 8400 .6 -M * 1.8 -M *
COLD SPRINGS 9630 2.4 .0 * 3.5 1.2 292
DEER PARK 9700 2.2 1.0 220* 2.8 1.7 165
HOBBS PARK 10100 3.5 1.0 350* 3.7 1.4 264
KIRWIN 9550 3.3 .8 412* 2.6 1.2 217
LITTLE WARM 9370 2.4 .5 480* 3.2 1.2 267
OWL CREEK 8975 1.7 .3 567* 1.9 .9 211
SOUTH PASS 9040 1.7 .2 850* 2.5 1.3 192
ST. LAWRENCE ALT 8620 1.2 .0 * 3.1 1.1 282
TOGWOTEE PASS 9580 3.4 1.7 200* 2.4 1.6 150
TOWNSEND CREEK 8700 -M .0 * -M 1.4 *
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Basin Index (%) 396* 222
BIGHORN BASIN
BALD MTN. 9380 4.8 2.0 240* 3.4 1.8 189
BEAR TRAP MEADOW 8200 2.2 .2 1100* 3.4 1.2 283
BONE SPRINGS DIV 9350 3.2 1.6 200* 2.8 1.8 156
GRAVE SPRINGS 8550 3.1 .3 1033* 3.7 1.5 247
KIRWIN 9550 3.3 .8 412* 2.6 1.2 217
MARQUETTE 8760 3.7 -M * 4.2 -M *
MIDDLE POWDER 7760 5.0 .4 1250* 4.6 1.7 271
OWL CREEK 8975 1.7 .3 567* 1.9 .9 211
POWDER RIVER PASS 9480 2.8 .6 467* 3.1 1.4 221
SHELL CREEK 9580 3.5 2.0 175 2.6 1.6 162
TIMBER CREEK 7950 2.1 .0 * 3.3 1.4 236
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Basin Index (%) 387* 217
SHOSHONE RIVER
BLACKWATER 9780 4.4 1.6 275* 2.4 1.9 126
EVENING STAR 9200 3.1 1.2 258* 2.5 2.0 125
MARQUETTE 8760 3.7 -M * 4.2 -M *
SYLVAN ROAD 7120 .0 .0 * 2.0 1.6 125
YOUNTS PEAK 8350 -M .5 * -M 1.4 *
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Basin Index (%) 268* 125
POWDER RIVER
BEAR TRAP MEADOW 8200 2.2 .2 1100* 3.4 1.2 283
CLOUD PEAK RESERVOIR 9860 3.3 1.0 330* 4.1 1.9 216
GRAVE SPRINGS 8550 3.1 .3 1033* 3.7 1.5 247
HANSEN SAWMILL 8360 2.2 .0 * 3.5 1.3 269
MIDDLE POWDER 7760 5.0 .4 1250* 4.6 1.7 271
POWDER RIVER PASS 9480 2.8 .6 467* 3.1 1.4 221
SOLDIER PARK 8720 1.9 -M * 3.3 -M *
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Basin Index (%) 744* 249
TONGUE RIVER
BIG GOOSE 7990 2.6 .5 520* 4.1 1.8 228
BONE SPRINGS DIV 9350 3.2 1.6 200* 2.8 1.8 156
BURGESS JUNCTION 7880 2.9 .6 483* 3.9 1.6 244
DOME LAKE 8880 2.6 1.0 260* 3.7 1.8 206
LITTLE GOOSE 8870 3.3 -M * 4.9 -M *
SUCKER CREEK 8880 4.1 .8 512* 4.6 1.8 256
TIE CREEK 6870 1.8 .0 * 4.2 1.9 221
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Basin Index (%) 382* 218
BELLE FOURCHE
COLE CANYON 5910 2.4 .0 * 6.6 1.3 508
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Basin Index (%) * 508
CHEYENNE RIVER BASIN
BLIND PARK 6890 2.8 .0 * 6.7 1.6 419
NORTH RAPID CREEK 6130 3.8 .0 * 7.1 1.4 507
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Basin Index (%) * 460
UPPER N. PLATTE
ARAPAHO RIDGE 10960 2.4 1.5 160* 3.2 1.9 168
BLACKHALL MTN 9820 3.6 -M * 5.0 -M *
COLUMBINE 9160 1.1 .0 * 3.1 1.7 182
DIVIDE PEAK 8880 2.4 .5 480* 4.7 2.0 235
JOE WRIGHT 10120 1.2 .8 150* 4.1 2.2 186
LAPRELE CREEK 8375 .6 .0 * 2.6 1.2 217
MED BOW 10500 4.0 -M * 4.9 -M *
NORTH FRENCH CREEK 10130 -M 1.2 * -M 2.1 *
NEVER SUMMER 10280 2.1 1.0 210* 2.8 -M *
OLD BATTLE 10000 3.5 1.3 269* 4.2 2.7 156
RAWAH 9020 1.5 .0 * 3.8 1.4 271
SAGE CREEK BASIN 7850 .4 .0 * 2.8 1.3 215
SAND LAKE 10050 4.0 1.4 286* 4.6 2.0 230
SOUTH BRUSH CREEK 8440 2.0 .0 * 4.0 1.5 267
TOWER 10500 4.6 1.7 271* 5.3 2.7 196
WEBBER SPRINGS 9250 1.6 .2 800* 3.5 2.0 175
WILLOW CREEK PASS 9540 1.8 .3 600* 2.2 1.2 183
ZIRKEL 9340 -M .0 * 2.9 2.6 112
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Basin Index (%) 336* 193
SWEETWATER
DEER PARK 9700 2.2 1.0 220* 2.8 1.7 165
LARSEN CREEK 9000 .0 -M * 1.9 -M *
SOUTH PASS 9040 1.7 .2 850* 2.5 1.3 192
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Basin Index (%) 325* 177
LOWER N. PLATTE
CASPER MTN. 7900 -M .2 * -M 1.8 *
LAPRELE CREEK 8375 .6 .0 * 2.6 1.2 217
RENO HILL 8400 -M .6 * -M 1.6 *
WINDY PEAK 7900 .4 .0 * 2.4 1.1 218
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Basin Index (%) * 217
LARAMIE RIVER
BROOKLYN LAKE 10240 1.6 .3 533* 2.5 1.5 167
CINNABAR PARK 9574 1.9 .5 380* 3.1 1.7 182
CROW CREEK 8330 .5 .0 * 2.5 1.3 192
DEADMAN HILL 10220 2.4 1.1 218* 3.2 1.6 200
RAWAH 9020 1.5 .0 * 3.8 1.4 271
ROACH 9700 -M .3 * -M 1.6 *
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Basin Index (%) 416* 201
S. PLATTE
BLACK MOUNTAIN 8920 1.3 -M * 2.4 -M *
CROW CREEK 8330 .5 .0 * 2.5 1.3 192
DEADMAN HILL 10220 2.4 1.1 218* 3.2 1.6 200
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Basin Index (%) 264* 197
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .9 .0 * 3.0 1.1 273
DIVIDE PEAK 8880 2.4 .5 480* 4.7 2.0 235
ELK RIVER 8700 .9 .0 * 2.9 1.6 181
LITTLE SNAKE RIVER 8915 1.8 .3 600* 4.4 2.7 163
OLD BATTLE 10000 3.5 1.3 269* 4.2 2.7 156
SAGE CREEK BASIN 7850 .4 .0 * 2.8 1.3 215
SANDSTONE RS 8150 1.3 .0 * 3.2 1.3 246
WHISKEY PARK 8950 3.2 .1 3200* 4.9 1.8 272
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Basin Index (%) 655* 208
UPPER GREEN RIVER
BIG SANDY OPENING 9080 1.3 .6 217* 1.5 1.1 136
BLIND BULL SUM 8650 .7 .4 175* 1.3 1.3 100
EAST RIM DIVIDE 7930 .1 .0 * 1.2 .8 150
ELKHART PARK G.S. 9400 1.3 .4 325* 2.0 1.2 167
GROS VENTRE SUMMIT 8750 2.1 .9 233* 2.0 1.1 182
GUNSIGHT PASS 9820 2.2 .5 440* 2.5 1.4 179
KENDALL R.S. 7740 .1 .0 * 1.2 .9 133
LOOMIS PARK 8240 .5 .0 * 1.4 1.0 140
NEW FORK LAKE 8340 .4 .0 * .8 .8 100
POCKET CREEK 9360 2.3 -M * 2.5 -M *
SNIDER BASIN 8060 .2 .0 * 1.1 .9 122
SPRING CREEK DIVIDE 9000 .6 .4 150* 1.1 1.3 85
TRIPLE PEAK 8500 .7 .2 350* 1.3 1.4 93
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Basin Index (%) 300* 132
LOWER GREEN RIVER
BLACKS FORK JCT 8870 -M -M * 1.8 -M *
BUCK PASTURE 9700 .6 -M * 2.3 -M *
EF BLACKS FORK GS 9360 .7 -M * 1.8 -M *
HAMS FORK 7840 .0 .0 * 1.5 .8 188
HEWINTA 9519 .0 .0 * 2.0 1.3 154
HICKERSON PARK 9145 .3 .0 * 1.6 1.1 145
HOLE-IN-ROCK 9150 .0 .0 * 1.3 1.2 108
INDIAN CREEK 9425 .8 .8 100* 1.5 1.3 115
KELLEY R.S. 8180 .6 .0 * 1.6 1.1 145
SPIRIT LK 10235 1.0 -M * 2.0 -M *
STEEL CREEK PARK 10200 .0 .6 0* 2.4 1.5 160
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Basin Index (%) 121* 143
UPPER BEAR RIVER
BEAR RIVER RS 8777 .0 -M * 1.7 -M *
BUG LAKE 7950 1.2 .0 * 1.5 1.4 107
BURTS MILLER RANCH 8000 .2 -M * .8 -M *
CHALK CREEK #1 8993 1.2 .3 400* 2.4 1.9 126
HAYDEN FORK 9212 .1 .0 * 2.5 1.6 156
KELLEY R.S. 8180 .6 .0 * 1.6 1.1 145
LILY LAKE 9156 .1 .0 * 2.5 1.5 167
MONTE CRISTO 8960 .7 .0 * 1.8 1.7 106
SALT RIVER SUMMIT 7760 .0 .0 * 1.4 1.0 140
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Basin Index (%) 1300* 134
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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.
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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.
