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 19 , 2018
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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 7060 .2 .0 * 1.2 1.1 109
Black Bear 8170 1.1 1.4 79* 3.0 2.1 143
Blind Bull Sum 8650 .0 .4 0* 1.7 1.2 142
Cottonwood Creek 7670 .3 .0 * 1.7 1.5 113
East Rim Divide 7930 .0 .0 * 1.2 .8 150
Grand Targhee 9260 1.6 2.7 59* 2.6 3.4 76
Granite Creek 6770 .1 .0 * 1.5 1.0 150
Grassy Lake 7265 .2 .0 * 2.1 1.9 111
Gros Ventre Summit 8750 .1 .8 12* 1.0 1.0 100
Gunsight Pass 9820 .0 .4 0* 1.7 1.3 131
Lewis Lake Divide 7850 .0 .0 * 1.6 1.7 94
Phillips Bench 8200 .0 .0 * 1.9 1.3 146
Salt River Summit 7640 .0 .0 * 1.8 1.0 180
Snake River Station 6920 .0 .0 * 1.5 1.5 100
Spring Creek Divide 9000 .5 .4 125* 1.9 1.2 158
Thumb Divide 7980 .0 .0 * 1.3 1.3 100
Togwotee Pass 9580 .9 1.6 56* 1.2 1.5 80
Two Ocean Plateau 9240 1.8 1.8 100* 1.6 1.7 94
Willow Creek 8080 .0 .0 * 2.9 2.0 145
Younts Peak 8350 -M .5 * -M 1.3 *
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Basin Index (%) 72* 117
MADISON-GALLATIN
Black Bear 8170 1.1 1.4 79* 3.0 2.1 143
Canyon 7870 .5 .2 250* 1.8 1.2 150
Madison Plateau 7750 .4 .5 80* 2.1 1.5 140
West Yellowstone 6700 .1 .0 * 1.5 1.1 136
Whiskey Creek 6800 .2 .0 * 1.0 1.3 77
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Basin Index (%) 110* 131
YELLOWSTONE
Beartooth Lake 9360 .9 1.5 60* .9 1.3 69
Burnt Mtn 5880 1.2 .0 * 2.6 2.5 104
Canyon 7870 .5 .2 250* 1.8 1.2 150
Cole Creek 7850 3.1 1.5 207* 2.6 2.2 118
Evening Star 9200 1.5 1.1 136* 2.4 1.9 126
Fisher Creek 9100 1.1 1.4 79* 2.2 2.0 110
Northeast Entrance 7350 .1 .0 * 1.2 1.1 109
Parker Peak 9400 1.6 1.4 114* 2.4 1.7 141
Sylvan Lake 8420 1.4 .7 200* 3.0 1.9 158
Thumb Divide 7980 .0 .0 * 1.3 1.3 100
Two Ocean Plateau 9240 1.8 1.8 100* 1.6 1.7 94
White Mill 8700 .6 1.1 55* 1.2 1.7 71
Wolverine 7650 .0 .0 * 1.1 1.2 92
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Basin Index (%) 129* 112
WIND RIVER
Burroughs Creek 8750 .0 -M * 1.0 -M *
Castle Creek 8400 .0 -M * .8 -M *
Cold Springs 9630 1.0 .0 * 1.3 1.1 118
Deer Park 9700 1.2 .8 150* 1.8 1.7 106
Hobbs Park 10100 1.3 .9 144* 1.8 1.4 129
Kirwin 9550 .7 .8 88* 1.0 1.2 83
Little Warm 9370 .2 .4 50* 1.6 1.2 133
Owl Creek 8975 1.2 .2 600* 1.3 .8 162
South Pass 9040 1.0 .1 1000* 1.8 1.2 150
St. Lawrence Alt 8620 .7 .0 * 1.9 1.1 173
Togwotee Pass 9580 .9 1.6 56* 1.2 1.5 80
Townsend Creek 8700 1.2 .0 * 1.9 1.4 136
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Basin Index (%) 196* 124
BIGHORN BASIN
Bald Mtn. 9380 1.4 2.0 70* 1.4 1.8 78
Bear Trap Meadow 8200 .9 .2 450* 1.4 1.1 127
Bone Springs Div 9350 1.5 1.5 100* 1.7 1.7 100
Grave Springs 8550 1.1 .2 550* 1.6 1.5 107
Kirwin 9550 .7 .8 88* 1.0 1.2 83
Marquette 8760 .2 -M * 1.1 -M *
Middle Powder 7760 1.4 .4 350* 1.6 1.6 100
Owl Creek 8975 1.2 .2 600* 1.3 .8 162
Powder River Pass 9480 .9 .5 180* 1.3 1.4 93
Shell Creek 9580 1.8 1.9 95 2.0 1.6 125
Timber Creek 7950 .8 .0 * 1.2 1.4 86
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Basin Index (%) 152* 103
SHOSHONE RIVER
Blackwater 9780 1.6 1.5 107* 2.3 1.8 128
Evening Star 9200 1.5 1.1 136* 2.4 1.9 126
Marquette 8760 .2 -M * 1.1 -M *
Sylvan Road 7120 .0 .0 * 1.1 1.4 79
Younts Peak 8350 -M .5 * -M 1.3 *
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Basin Index (%) 119* 114
POWDER RIVER
Bear Trap Meadow 8200 .9 .2 450* 1.4 1.1 127
Cloud Peak Reservoir 9860 1.8 1.0 180* 2.0 1.8 111
Grave Springs 8550 1.1 .2 550* 1.6 1.5 107
Hansen Sawmill 8360 1.3 .0 * 1.8 1.2 150
Middle Powder 7760 1.4 .4 350* 1.6 1.6 100
Powder River Pass 9480 .9 .5 180* 1.3 1.4 93
Soldier Park 8720 1.2 -M * 1.6 -M *
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Basin Index (%) 322* 113
TONGUE RIVER
Big Goose 7990 1.4 .5 280* 2.1 1.7 124
Bone Springs Div 9350 1.5 1.5 100* 1.7 1.7 100
Burgess Junction 7880 1.2 .6 200* 1.7 1.5 113
Dome Lake 8880 1.4 1.0 140* 2.1 1.8 117
Little Goose 8870 1.8 -M * 1.7 -M *
Sucker Creek 8880 1.6 .8 200* 1.9 1.8 106
Tie Creek 6870 1.4 .0 * 2.6 1.9 137
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Basin Index (%) 193* 116
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 1.6 1.3 123
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Basin Index (%) * 123
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 1.0 1.5 67
North Rapid Creek 6130 .0 .0 * .7 1.3 54
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Basin Index (%) * 61
UPPER N. PLATTE
Arapaho Ridge 10960 1.9 1.3 146* 3.4 1.8 189
Blackhall Mtn 9820 1.3 -M * 3.6 -M *
Columbine 9160 .3 .0 * 3.4 1.7 200
Divide Peak 8880 .8 .4 200* 3.1 2.0 155
Joe Wright 10120 1.9 .8 238* 4.3 2.1 205
Laprele Creek 8375 .7 .0 * 1.3 1.2 108
Med Bow 10500 1.0 -M * 3.2 -M *
North French Creek 10130 .8 1.0 80* 2.5 2.0 125
Never Summer 10280 2.1 .9 233* 3.4 -M *
Old Battle 10000 2.1 1.3 162* 4.4 2.5 176
Rawah 9020 1.1 .0 * 2.9 1.3 223
Sage Creek Basin 7850 .1 .0 * 2.5 1.2 208
Sand Lake 10050 1.0 1.2 83* 1.7 1.9 89
South Brush Creek 8440 .0 .0 * 1.5 1.5 100
Tower 10500 2.7 1.5 180* 3.5 2.6 135
Webber Springs 9250 1.2 .2 600* 3.9 1.9 205
Willow Creek Pass 9540 1.5 .3 500* 2.8 1.1 255
Zirkel 9340 .3 .0 * 3.3 2.5 132
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Basin Index (%) 208* 163
SWEETWATER
Deer Park 9700 1.2 .8 150* 1.8 1.7 106
Larsen Creek 9000 .0 .0 * 1.5 -M *
South Pass 9040 1.0 .1 1000* 1.8 1.2 150
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Basin Index (%) 244* 124
LOWER N. PLATTE
Casper Mtn. 7900 .6 .1 600* 1.4 1.7 82
Laprele Creek 8375 .7 .0 * 1.3 1.2 108
Reno Hill 8400 1.0 .6 167* 1.5 1.5 100
Windy Peak 7900 .9 .0 * .7 1.1 64
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Basin Index (%) 457* 89
LARAMIE RIVER
Brooklyn Lake 10240 1.1 .3 367* 2.0 1.4 143
Cinnabar Park 9574 1.5 .3 500* 2.8 1.6 175
Crow Creek 8330 .4 .0 * 1.6 1.2 133
Deadman Hill 10220 1.5 1.0 150* 2.2 1.5 147
Rawah 9020 1.1 .0 * 2.9 1.3 223
Roach 9700 1.4 .3 467* 2.5 1.5 167
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Basin Index (%) 368* 165
S. PLATTE
Black Mountain 8920 .9 -M * 1.5 -M *
Crow Creek 8330 .4 .0 * 1.6 1.2 133
Deadman Hill 10220 1.5 1.0 150* 2.2 1.5 147
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Basin Index (%) 190* 141
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * 1.9 1.0 190
Divide Peak 8880 .8 .4 200* 3.1 2.0 155
Elk River 8700 .1 .0 * 2.1 1.6 131
Little Snake River 8915 .0 .2 0* 4.7 2.5 188
Old Battle 10000 2.1 1.3 162* 4.4 2.5 176
Sage Creek Basin 7850 .1 .0 * 2.5 1.2 208
Sandstone RS 8150 .1 .0 * 2.3 1.2 192
Whiskey Park 8950 1.4 .0 * 3.8 1.7 224
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Basin Index (%) 253* 181
UPPER GREEN RIVER
Big Sandy Opening 9080 .5 .6 83* 1.6 1.1 145
Blind Bull Sum 8650 .0 .4 0* 1.7 1.2 142
East Rim Divide 7930 .0 .0 * 1.2 .8 150
Elkhart Park G.S. 9400 1.1 .4 275* 2.3 1.1 209
Gros Ventre Summit 8750 .1 .8 12* 1.0 1.0 100
Gunsight Pass 9820 .0 .4 0* 1.7 1.3 131
Kendall R.S. 7740 .1 .0 * 1.2 .8 150
Loomis Park 8240 -M .0 * -M 1.0 *
New Fork Lake 8340 .0 .0 * 1.2 .8 150
Pocket Creek 9360 1.0 -M * 2.3 -M *
Snyder Basin 8060 .0 .0 * 1.6 .8 200
Spring Creek Divide 9000 .5 .4 125* 1.9 1.2 158
Triple Peak 8500 .5 .2 250* 1.9 1.2 158
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Basin Index (%) 88* 153
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 2.1 -M *
Buck Pasture 9632 .3 -M * 3.1 -M *
EF Blacks Fork GS 9360 .3 -M * 2.2 -M *
Hams Fork 7840 .0 .0 * 1.6 .7 229
Hewinta 9500 .0 .0 * 2.3 1.2 192
Hickerson Park 9122 1.7 .0 * 3.3 1.0 330
Hole-in-Rock 9168 .4 .0 * 2.7 1.2 225
Indian Creek 9425 .4 .7 57* 1.5 1.2 125
Kelley R.S. 8180 .8 .0 * 1.6 1.0 160
Spirit Lk 10235 1.7 -M * 4.3 -M *
Steel Creek Park 10158 .5 .6 83* 2.5 1.5 167
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Basin Index (%) 292* 199
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 2.4 -M *
Bug Lake 7987 .8 .0 * 3.5 1.3 269
Burts Miller Ranch 8000 .0 -M * 1.5 -M *
Chalk Creek #1 9171 .8 .3 267* 5.1 1.8 283
Hayden Fork 9130 .0 .0 * 3.6 1.5 240
Kelley R.S. 8180 .8 .0 * 1.6 1.0 160
Lily Lake 9133 .0 .0 * 2.5 1.4 179
Monte Cristo 8932 1.4 .0 * 3.0 1.6 188
Salt River Summit 7640 .0 .0 * 1.8 1.0 180
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Basin Index (%) 1267* 220
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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.
