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: MAY 22 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 6.9 .0 * 43.2 24.7 175
Black Bear 8170 44.9 32.7 137 61.7 44.9 137
Blind Bull Sum 8650 -M 18.8 * 39.6 23.4 169
Cottonwood Creek 7670 17.5 4.4 398 45.1 30.3 149
East Rim Divide 7930 .0 .0 * 23.5 14.3 164
Grand Targhee 9260 56.1 41.6 135 52.9 37.1 143
Granite Creek 6770 5.0 .0 * 38.6 23.1 167
Grassy Lake 7265 23.9 15.4 155 62.5 42.1 148
Gros Ventre Summit 8750 -M 4.2 * -M 16.3 *
Gunsight Pass 9820 20.2 9.3 217 29.6 17.8 166
Lewis Lake Divide 7850 34.1 21.0 162 60.1 41.2 146
Phillips Bench 8200 31.3 17.6 178 51.4 33.1 155
Salt River Summit 7760 2.5 .0 * 32.6 20.1 162
Snake River Station 6920 .0 .0 * 39.6 26.7 148
Spring Creek Divide 9000 37.8 19.0 199 45.9 28.3 162
Thumb Divide 7980 2.5 .3 833* 31.2 22.9 136
Togwotee Pass 9580 32.8 22.8 144 44.5 29.9 149
Two Ocean Plateau 9240 -M 28.0 * -M 33.1 *
Willow Creek 8380 -M 14.7 * 59.4 41.2 144
Younts Peak 8350 .3 11.1 3 33.6 19.8 170
----- -----
Basin Index (%) 162 153
MADISON-GALLATIN
Black Bear 8170 44.9 32.7 137 61.7 44.9 137
Canyon 7870 7.9 1.1 718* 29.7 20.0 148
Madison Plateau 7750 19.1 13.3 144 41.4 31.8 130
West Yellowstone 6700 .0 .0 * 26.8 17.7 151
Whiskey Creek 6800 3.3 4.3 77 30.7 24.5 125
----- -----
Basin Index (%) 146 137
YELLOWSTONE
Beartooth Lake 9360 33.4 21.1 158 33.0 24.3 136
Burnt Mtn 5880 1.4 .0 * 23.3 19.3 121
Canyon 7870 7.9 1.1 718* 29.7 20.0 148
Cole Creek 7850 16.0 15.2 105 19.3 19.7 98
Evening Star 9200 35.3 23.0 153 50.9 33.6 151
Fisher Creek 9100 47.9 32.2 149 53.5 38.6 139
Northeast Entrance 7350 .0 .0 * 23.8 15.7 152
Parker Peak 9400 35.2 19.4 181 41.4 22.6 183
Sylvan Lake 8420 16.1 14.2 113 43.5 27.9 156
Thumb Divide 7980 2.5 .3 833* 31.2 22.9 136
Two Ocean Plateau 9240 -M 28.0 * -M 33.1 *
White Mill 8700 32.2 21.6 149 40.6 29.2 139
Wolverine 7650 -M .0 * 24.7 15.7 157
----- -----
Basin Index (%) 154 143
WIND RIVER
Burroughs Creek 8750 7.7 -M * 29.6 -M *
Castle Creek 8400 .0 -M * 18.7 -M *
Cold Springs 9630 6.6 .0 * 24.4 14.5 168
Deer Park 9700 31.6 9.5 333 46.2 26.1 177
Hobbs Park 10100 31.8 12.2 261 36.9 19.5 189
Kirwin 9550 19.3 7.5 257 30.6 16.1 190
Little Warm 9370 11.7 1.5 780 28.1 17.5 161
Owl Creek 8975 .2 .0 * 17.0 9.8 173
South Pass 9040 29.3 4.9 598 36.0 22.6 159
St. Lawrence Alt 8620 1.3 .0 * 22.5 13.6 165
Togwotee Pass 9580 32.8 22.8 144 44.5 29.9 149
Townsend Creek 8700 13.2 .0 * 30.6 17.2 178
----- -----
Basin Index (%) 304 170
BIGHORN BASIN
Bald Mtn. 9380 20.5 18.4 111 22.9 22.2 103
Bear Trap Meadow 8200 .0 .0 * 16.8 12.8 131
Bone Springs Div 9350 18.0 13.7 131 23.1 21.1 109
Grave Springs 8550 4.4 .9 489* 15.3 15.1 101
Kirwin 9550 19.3 7.5 257 30.6 16.1 190
Marquette 8760 15.7 -M * 26.2 -M *
Middle Powder 7760 3.0 3.5 86 15.4 16.4 94
Owl Creek 8975 .2 .0 * 17.0 9.8 173
Powder River Pass 9480 3.6 4.0 90 18.9 17.5 108
Shell Creek 9580 14.2 14.6 97 19.3 18.7 103
Timber Creek 7950 1.6 .0 * 17.8 12.4 144
----- -----
Basin Index (%) 135 122
SHOSHONE RIVER
Blackwater 9780 40.1 23.8 168 48.2 26.2 184
Evening Star 9200 35.3 23.0 153 50.9 33.6 151
Marquette 8760 15.7 -M * 26.2 -M *
Sylvan Road 7120 .0 .0 * 33.3 20.5 162
Younts Peak 8350 .3 11.1 3 33.6 19.8 170
----- -----
Basin Index (%) 131 166
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 16.8 12.8 131
Cloud Peak Reservoir 9860 18.1 13.8 131 28.1 19.8 142
Grave Springs 8550 4.4 .9 489* 15.3 15.1 101
Hansen Sawmill 8360 6.6 .0 * 18.8 13.1 144
Middle Powder 7760 3.0 3.5 86 15.4 16.4 94
Powder River Pass 9480 3.6 4.0 90 18.9 17.5 108
Soldier Park 8720 8.0 -M * 22.4 -M *
----- -----
Basin Index (%) 161* 120
TONGUE RIVER
Big Goose 7990 8.3 2.9 286 21.2 17.3 123
Bone Springs Div 9350 18.0 13.7 131 23.1 21.1 109
Burgess Junction 7880 6.3 6.9 91 17.2 17.2 100
Dome Lake 8880 13.9 4.7 296 24.3 19.2 127
Little Goose 8870 11.5 -M * 25.5 -M *
Sucker Creek 8880 10.4 7.6 137 20.9 20.5 102
Tie Creek 6870 1.8 .0 * 24.2 17.4 139
----- -----
Basin Index (%) 164 116
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 13.5 15.0 90
----- -----
Basin Index (%) * 90
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.1 17.0 83
North Rapid Creek 6130 .0 .0 * 12.3 14.7 84
----- -----
Basin Index (%) * 83
UPPER N. PLATTE
Arapaho Ridge 10960 21.5 16.5 130 32.2 28.5 113
Blackhall Mtn 9820 29.2 -M * 43.9 -M *
Columbine 9160 .8 .6 133* 34.5 30.7 112
Divide Peak 8880 .4 3.9 10 27.4 26.6 103
Joe Wright 10120 15.3 20.2 76 36.3 33.0 110
Laprele Creek 8375 .3 .0 * 17.0 17.0 100
Med Bow 10500 36.1 -M * 42.7 -M *
North French Creek 10130 22.0 28.2 78 35.6 33.9 105
Never Summer 10280 21.8 19.2 114 24.7 -M *
Old Battle 10000 37.7 31.8 119 45.0 42.3 106
Rawah 9020 .7 .3 233* 22.1 18.9 117
Sage Creek Basin 7850 -M .0 * 19.0 17.5 109
Sand Lake 10050 30.8 27.0 114 34.1 32.1 106
South Brush Creek 8440 .0 .0 * 16.3 20.3 80
Tower 10500 40.9 46.9 87 54.5 48.1 113
Webber Springs 9250 12.0 9.9 121 39.2 32.2 122
Willow Creek Pass 9540 12.5 8.2 152 22.3 17.5 127
Zirkel 9340 11.0 6.5 169 49.4 33.4 148
----- -----
Basin Index (%) 104 112
SWEETWATER
Deer Park 9700 31.6 9.5 333 46.2 26.1 177
Larsen Creek 9000 .6 3.0 20 27.7 -M *
South Pass 9040 29.3 4.9 598 36.0 22.6 159
----- -----
Basin Index (%) 353 169
LOWER N. PLATTE
Casper Mtn. 7900 1.8 2.9 62 21.0 20.6 102
Laprele Creek 8375 .3 .0 * 17.0 17.0 100
Reno Hill 8400 2.0 1.7 118 21.1 21.6 98
Windy Peak 7900 1.3 .0 * 17.7 15.1 117
----- -----
Basin Index (%) 117 103
LARAMIE RIVER
Brooklyn Lake 10240 12.9 14.6 88 28.6 27.4 104
Cinnabar Park 9574 6.5 10.5 62 29.0 29.6 98
Crow Creek 8330 -M .0 * 15.6 15.2 103
Deadman Hill 10220 16.4 15.3 107 28.4 23.2 122
Rawah 9020 .7 .3 233* 22.1 18.9 117
Roach 9700 9.5 10.0 95 28.1 24.8 113
----- -----
Basin Index (%) 91 109
S. PLATTE
Black Mountain 8920 2.4 -M * 20.2 -M *
Crow Creek 8330 -M .0 * 15.6 15.2 103
Deadman Hill 10220 16.4 15.3 107 28.4 23.2 122
----- -----
Basin Index (%) 107* 115
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.4 18.7 109
Divide Peak 8880 .4 3.9 10 27.4 26.6 103
Elk River 8700 .2 .0 * 24.5 24.7 99
Little Snake River 8915 12.3 11.0 112 44.9 35.2 128
Old Battle 10000 37.7 31.8 119 45.0 42.3 106
Sage Creek Basin 7850 -M .0 * 19.0 17.5 109
Sandstone RS 8150 .0 .0 * 19.4 22.6 86
Whiskey Park 8950 17.0 20.0 85 37.1 34.0 109
----- -----
Basin Index (%) 101 107
UPPER GREEN RIVER
Big Sandy Opening 9080 13.0 1.1 1182* 27.1 17.0 159
Blind Bull Sum 8650 -M 18.8 * 39.6 23.4 169
East Rim Divide 7930 .0 .0 * 23.5 14.3 164
Elkhart Park G.S. 9400 12.2 4.7 260 27.7 17.0 163
Gros Ventre Summit 8750 -M 4.2 * -M 16.3 *
Gunsight Pass 9820 20.2 9.3 217 29.6 17.8 166
Kendall R.S. 7740 .0 .0 * 31.7 16.9 188
Loomis Park 8240 13.3 1.0 1330* 35.4 20.7 171
New Fork Lake 8340 -M .0 * 21.7 13.7 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 29.7 16.9 176
Spring Creek Divide 9000 37.8 19.0 199 45.9 28.3 162
Triple Peak 8500 23.4 6.4 366 45.5 30.4 150
----- -----
Basin Index (%) 289* 165
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.7 -M *
Buck Pasture 9632 4.7 -M * 28.4 -M *
EF Blacks Fork GS 9360 -M -M * 23.9 -M *
Hams Fork 7840 .0 .0 * 24.8 14.6 170
Hewinta 9500 .0 .0 * 22.2 17.9 124
Hickerson Park 9122 .2 .0 * 16.3 13.6 120
Hole-in-Rock 9168 .0 .0 * 17.2 13.2 130
Indian Creek 9425 35.7 17.0 210 46.8 27.2 172
Kelley R.S. 8180 7.2 1.2 600* 35.3 22.0 160
Spirit Lk 10235 4.6 -M * 22.5 -M *
Steel Creek Park 10158 16.4 13.7 120 26.6 21.2 125
----- -----
Basin Index (%) 187* 146
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 22.1 -M *
Bug Lake 7987 20.3 2.5 812 38.9 23.7 164
Burts Miller Ranch 8000 .0 -M * 12.3 -M *
Chalk Creek #1 9171 23.6 13.7 172 42.4 31.1 136
Hayden Fork 9130 .2 .0 * 33.3 26.0 128
Kelley R.S. 8180 7.2 1.2 600* 35.3 22.0 160
Lily Lake 9133 .0 .0 * 23.9 21.5 111
Monte Cristo 8932 27.9 12.9 216 46.3 31.8 146
Salt River Summit 7760 2.5 .0 * 32.6 20.1 162
----- -----
Basin Index (%) 270* 143
-----------------------------------------------------------------------------
-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.