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: SEPTEMBER 15 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 .1 .0 * -M 31.1 *
Black Bear 8170 .2 .0 * 68.2 53.7 127
Blind Bull Sum 8650 .0 .0 * 44.4 29.9 148
Cottonwood Creek 7670 .1 .0 * 50.9 37.8 135
East Rim Divide 7930 .3 .0 * 28.2 19.3 146
Grand Targhee 9260 .0 .0 * 60.7 47.0 129
Granite Creek 6770 .1 .0 * 45.0 28.9 156
Grassy Lake 7265 .2 .0 * 69.0 50.9 136
Gros Ventre Summit 8750 .2 .0 * 33.0 22.6 146
Gunsight Pass 9820 .0 .0 * 36.4 24.9 146
Lewis Lake Divide 7850 .2 .0 * 69.6 49.5 141
Phillips Bench 8200 .0 .0 * 56.8 40.3 141
Salt River Summit 7760 .1 .0 * 34.5 25.9 133
Snake River Station 6920 .0 .0 * 45.3 34.1 133
Spring Creek Divide 9000 .3 .0 * 49.5 34.7 143
Thumb Divide 7980 .0 .0 * 36.4 29.0 126
Togwotee Pass 9580 .2 .0 * 51.4 37.5 137
Two Ocean Plateau 9240 -M .0 * -M 42.0 *
Willow Creek 8380 .1 .0 * 64.0 50.3 127
Younts Peak 8350 .0 .0 * 43.3 28.1 154
----- -----
Basin Index (%) * 138
MADISON-GALLATIN
Black Bear 8170 .2 .0 * 68.2 53.7 127
Canyon 7870 .2 .0 * -M 26.9 *
Madison Plateau 7750 .0 .0 * 46.6 39.7 117
West Yellowstone 6700 .2 .0 * -M 23.4 *
Whiskey Creek 6800 .0 .0 * 35.7 32.0 112
----- -----
Basin Index (%) * 120
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 39.8 32.1 124
Burnt Mtn 5880 .2 .0 * 27.4 28.5 96
Canyon 7870 .2 .0 * -M 26.9 *
Cole Creek 7850 .4 .0 * 22.9 29.7 77
Evening Star 9200 .1 .0 * 57.5 43.6 132
Fisher Creek 9100 .1 .0 * 61.7 50.3 123
Northeast Entrance 7350 .1 .0 * 29.6 24.1 123
Parker Peak 9400 .0 .0 * 49.7 30.7 162
Sylvan Lake 8420 .1 .0 * 50.6 36.8 138
Thumb Divide 7980 .0 .0 * 36.4 29.0 126
Two Ocean Plateau 9240 -M .0 * -M 42.0 *
White Mill 8700 .1 .0 * 48.0 39.3 122
Wolverine 7650 -M .0 * 30.8 22.6 136
----- -----
Basin Index (%) * 124
WIND RIVER
Burroughs Creek 8750 .1 -M * 33.4 -M *
Castle Creek 8400 .0 -M * 25.2 -M *
Cold Springs 9630 .3 .0 * 28.5 20.7 138
Deer Park 9700 .0 .0 * 51.3 33.7 152
Hobbs Park 10100 .2 .0 * 41.9 26.6 158
Kirwin 9550 .0 .0 * 36.8 25.1 147
Little Warm 9370 .2 .0 * 32.6 24.8 131
Owl Creek 8975 .0 .0 * -M 16.4 *
South Pass 9040 .0 .0 * 40.9 28.4 144
St. Lawrence Alt 8620 .1 .0 * 27.0 19.3 140
Togwotee Pass 9580 .2 .0 * 51.4 37.5 137
Townsend Creek 8700 .1 .0 * 35.7 23.4 153
----- -----
Basin Index (%) * 145
BIGHORN BASIN
Bald Mtn. 9380 .2 .0 * 27.5 30.8 89
Bear Trap Meadow 8200 .1 .0 * 21.4 19.7 109
Bone Springs Div 9350 .1 .0 * 32.2 29.9 108
Grave Springs 8550 .0 .0 * 17.0 21.8 78
Kirwin 9550 .0 .0 * 36.8 25.1 147
Marquette 8760 .1 -M * 31.5 -M *
Middle Powder 7760 .3 .0 * 18.6 23.7 78
Owl Creek 8975 .0 .0 * -M 16.4 *
Powder River Pass 9480 .1 .0 * 27.8 25.5 109
Shell Creek 9580 .0 .0 * 26.9 27.0 100
Timber Creek 7950 .1 .0 * 23.7 20.1 118
----- -----
Basin Index (%) * 104
SHOSHONE RIVER
Blackwater 9780 .1 .0 * 55.3 35.0 158
Evening Star 9200 .1 .0 * 57.5 43.6 132
Marquette 8760 .1 -M * 31.5 -M *
Sylvan Road 7120 .0 .0 * 39.6 27.6 143
Younts Peak 8350 .0 .0 * 43.3 28.1 154
----- -----
Basin Index (%) * 146
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 21.4 19.7 109
Cloud Peak Reservoir 9860 .1 .0 * 35.3 29.1 121
Grave Springs 8550 .0 .0 * 17.0 21.8 78
Hansen Sawmill 8360 .1 .0 * 29.7 21.0 141
Middle Powder 7760 .3 .0 * 18.6 23.7 78
Powder River Pass 9480 .1 .0 * 27.8 25.5 109
Soldier Park 8720 .0 -M * 29.4 -M *
----- -----
Basin Index (%) * 106
TONGUE RIVER
Big Goose 7990 .1 .0 * 25.6 23.6 108
Bone Springs Div 9350 .1 .0 * 32.2 29.9 108
Burgess Junction 7880 .0 .0 * 26.6 24.4 109
Dome Lake 8880 .0 .0 * 30.3 27.1 112
Little Goose 8870 .0 -M * 31.3 -M *
Sucker Creek 8880 .0 .0 * 31.0 28.5 109
Tie Creek 6870 .0 .0 * 30.4 25.5 119
----- -----
Basin Index (%) * 111
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 22.9 24.6 93
----- -----
Basin Index (%) * 93
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 23.1 26.7 87
North Rapid Creek 6130 .1 .0 * 22.9 26.2 87
----- -----
Basin Index (%) * 87
UPPER N. PLATTE
Arapaho Ridge 10960 -M .0 * -M 36.8 *
Blackhall Mtn 9820 .7 -M * 48.5 -M *
Columbine 9160 .4 .0 * 38.9 36.9 105
Divide Peak 8880 .0 .0 * 29.5 32.6 90
Joe Wright 10120 .4 .0 * 43.2 42.5 102
Laprele Creek 8375 .1 .0 * 22.9 23.3 98
Med Bow 10500 .1 -M * 51.4 -M *
North French Creek 10130 -M .0 * 41.7 41.9 100
Never Summer 10280 -M .0 * 30.5 -M *
Old Battle 10000 .1 .0 * 50.6 50.2 101
Rawah 9020 .1 .0 * 26.4 25.9 102
Sage Creek Basin 7850 -M .0 * 21.4 22.1 97
Sand Lake 10050 .1 .0 * 41.3 39.6 104
South Brush Creek 8440 .1 .0 * 19.4 26.3 74
Tower 10500 -M .0 * -M 56.6 *
Webber Springs 9250 .6 .0 * 43.6 39.0 112
Willow Creek Pass 9540 .1 .0 * 27.4 25.0 110
Zirkel 9340 .0 .0 * 55.4 41.3 134
----- -----
Basin Index (%) * 103
SWEETWATER
Deer Park 9700 .0 .0 * 51.3 33.7 152
Larsen Creek 9000 .0 .0 * 31.3 -M *
South Pass 9040 .0 .0 * 40.9 28.4 144
----- -----
Basin Index (%) * 148
LOWER N. PLATTE
Casper Mtn. 7900 .1 .0 * 25.9 26.8 97
Laprele Creek 8375 .1 .0 * 22.9 23.3 98
Reno Hill 8400 .0 .0 * 25.7 27.7 93
Windy Peak 7900 .0 .0 * 22.3 22.1 101
----- -----
Basin Index (%) * 97
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * 32.6 34.2 95
Cinnabar Park 9574 .0 .0 * 34.4 36.5 94
Crow Creek 8330 -M .0 * 19.8 24.8 80
Deadman Hill 10220 .0 .0 * 34.4 29.9 115
Rawah 9020 .1 .0 * 26.4 25.9 102
Roach 9700 .1 .0 * 33.9 32.0 106
----- -----
Basin Index (%) * 99
S. PLATTE
Black Mountain 8920 -M -M * 25.8 -M *
Crow Creek 8330 -M .0 * 19.8 24.8 80
Deadman Hill 10220 .0 .0 * 34.4 29.9 115
----- -----
Basin Index (%) * 99
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 22.0 23.2 95
Divide Peak 8880 .0 .0 * 29.5 32.6 90
Elk River 8700 .0 .0 * 28.1 31.2 90
Little Snake River 8915 .2 .0 * 49.8 41.8 119
Old Battle 10000 .1 .0 * 50.6 50.2 101
Sage Creek Basin 7850 -M .0 * 21.4 22.1 97
Sandstone RS 8150 .1 .0 * 22.6 28.3 80
Whiskey Park 8950 .1 .0 * 40.1 40.4 99
----- -----
Basin Index (%) * 98
UPPER GREEN RIVER
Big Sandy Opening 9080 .1 .0 * 30.8 23.1 133
Blind Bull Sum 8650 .0 .0 * 44.4 29.9 148
East Rim Divide 7930 .3 .0 * 28.2 19.3 146
Elkhart Park G.S. 9400 .1 .0 * 32.3 23.6 137
Gros Ventre Summit 8750 .2 .0 * 33.0 22.6 146
Gunsight Pass 9820 .0 .0 * 36.4 24.9 146
Kendall R.S. 7740 .1 .0 * 38.3 22.2 173
Loomis Park 8240 .2 .0 * 41.5 26.8 155
New Fork Lake 8340 .1 .0 * 26.5 19.5 136
Pocket Creek 9360 .1 -M * 30.4 -M *
Snider Basin 8060 .1 .0 * 32.3 21.3 152
Spring Creek Divide 9000 .3 .0 * 49.5 34.7 143
Triple Peak 8500 .1 .0 * 50.3 37.2 135
----- -----
Basin Index (%) * 145
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 23.0 -M *
Buck Pasture 9632 .0 -M * 34.0 -M *
EF Blacks Fork GS 9360 -M -M * 29.6 -M *
Hams Fork 7840 -M .0 * -M 19.1 *
Hewinta 9500 .1 .0 * 27.2 25.0 109
Hickerson Park 9122 .4 .0 * 22.4 20.8 108
Hole-in-Rock 9168 .0 .0 * 24.1 20.2 119
Indian Creek 9425 .1 .0 * 50.0 32.9 152
Kelley R.S. 8180 .3 .0 * 40.0 27.2 147
Spirit Lk 10235 .0 -M * 31.0 -M *
Steel Creek Park 10158 .1 .0 * 33.1 28.8 115
----- -----
Basin Index (%) * 127
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 25.0 -M *
Bug Lake 7987 .8 .0 * 42.4 28.8 147
Burts Miller Ranch 8000 .1 -M * 13.8 -M *
Chalk Creek #1 9171 .0 .0 * 47.5 38.8 122
Hayden Fork 9130 .0 .0 * 37.6 33.0 114
Kelley R.S. 8180 .3 .0 * 40.0 27.2 147
Lily Lake 9133 .0 .0 * 29.2 28.3 103
Monte Cristo 8932 .4 .0 * 51.0 38.1 134
Salt River Summit 7760 .1 .0 * 34.5 25.9 133
----- -----
Basin Index (%) * 128
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.