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: MAY 21 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 7.6 .0 * 43.2 24.6 176
Black Bear 8170 45.4 33.2 137 61.7 44.7 138
Blind Bull Sum 8650 -M 19.4 * 39.6 23.3 170
Cottonwood Creek 7670 18.4 5.4 341 45.0 30.0 150
East Rim Divide 7930 .0 .0 * 23.5 14.2 165
Grand Targhee 9260 55.3 41.8 132 52.9 36.8 144
Granite Creek 6770 6.2 .0 * 38.7 23.0 168
Grassy Lake 7265 25.1 16.4 153 62.5 41.9 149
Gros Ventre Summit 8750 -M 4.9 * -M 16.2 *
Gunsight Pass 9820 20.5 9.9 207 29.6 17.7 167
Lewis Lake Divide 7850 34.9 21.7 161 60.1 41.1 146
Phillips Bench 8200 31.8 18.4 173 51.3 33.0 155
Salt River Summit 7760 3.3 .0 * 32.7 20.0 164
Snake River Station 6920 .0 .0 * 39.6 26.6 149
Spring Creek Divide 9000 37.9 19.7 192 45.8 28.1 163
Thumb Divide 7980 3.9 .8 488* 31.2 22.8 137
Togwotee Pass 9580 33.0 22.9 144 44.5 29.8 149
Two Ocean Plateau 9240 -M 28.2 * -M 33.0 *
Willow Creek 8380 -M 15.8 * 59.4 41.0 145
Younts Peak 8350 1.4 11.5 12 33.6 19.6 171
----- -----
Basin Index (%) 161 153
MADISON-GALLATIN
Black Bear 8170 45.4 33.2 137 61.7 44.7 138
Canyon 7870 8.4 1.6 525 29.7 19.9 149
Madison Plateau 7750 19.1 13.8 138 41.4 31.6 131
West Yellowstone 6700 .1 .0 * 26.8 17.6 152
Whiskey Creek 6800 4.1 5.0 82 30.5 24.4 125
----- -----
Basin Index (%) 144 138
YELLOWSTONE
Beartooth Lake 9360 33.8 21.4 158 32.8 24.2 136
Burnt Mtn 5880 2.2 .0 * 23.3 19.2 121
Canyon 7870 8.4 1.6 525 29.7 19.9 149
Cole Creek 7850 16.1 15.8 102 19.3 19.6 98
Evening Star 9200 35.4 23.4 151 50.9 33.4 152
Fisher Creek 9100 48.9 32.5 150 53.4 38.5 139
Northeast Entrance 7350 .0 .0 * 23.8 15.6 153
Parker Peak 9400 35.3 19.6 180 41.5 22.5 184
Sylvan Lake 8420 16.5 14.7 112 43.5 27.7 157
Thumb Divide 7980 3.9 .8 488* 31.2 22.8 137
Two Ocean Plateau 9240 -M 28.2 * -M 33.0 *
White Mill 8700 32.9 21.9 150 40.7 29.0 140
Wolverine 7650 -M .0 * 24.8 15.6 159
----- -----
Basin Index (%) 154 144
WIND RIVER
Burroughs Creek 8750 8.5 -M * 29.7 -M *
Castle Creek 8400 .0 -M * 18.5 -M *
Cold Springs 9630 6.7 .0 * 24.4 14.4 169
Deer Park 9700 31.5 10.0 315 46.0 26.0 177
Hobbs Park 10100 31.7 12.7 250 36.9 19.4 190
Kirwin 9550 19.8 8.0 248 30.6 15.9 192
Little Warm 9370 11.8 2.1 562 28.1 17.4 161
Owl Creek 8975 .8 .0 * 16.9 9.7 174
South Pass 9040 29.7 5.8 512 35.9 22.5 160
St. Lawrence Alt 8620 1.5 .0 * 22.4 13.5 166
Togwotee Pass 9580 33.0 22.9 144 44.5 29.8 149
Townsend Creek 8700 13.3 .0 * 30.6 17.2 178
----- -----
Basin Index (%) 292 170
BIGHORN BASIN
Bald Mtn. 9380 20.7 18.8 110 22.9 22.1 104
Bear Trap Meadow 8200 .1 .0 * 16.7 12.6 133
Bone Springs Div 9350 18.0 14.0 129 23.0 20.9 110
Grave Springs 8550 4.9 1.9 258 15.2 15.1 101
Kirwin 9550 19.8 8.0 248 30.6 15.9 192
Marquette 8760 16.1 -M * 26.2 -M *
Middle Powder 7760 4.0 4.4 91 15.2 16.3 93
Owl Creek 8975 .8 .0 * 16.9 9.7 174
Powder River Pass 9480 3.6 4.7 77 18.9 17.3 109
Shell Creek 9580 14.2 14.9 95 19.3 18.5 104
Timber Creek 7950 2.2 .0 * 17.8 12.2 146
----- -----
Basin Index (%) 132 122
SHOSHONE RIVER
Blackwater 9780 40.0 24.0 167 48.2 26.1 185
Evening Star 9200 35.4 23.4 151 50.9 33.4 152
Marquette 8760 16.1 -M * 26.2 -M *
Sylvan Road 7120 .0 .0 * 33.3 20.3 164
Younts Peak 8350 1.4 11.5 12 33.6 19.6 171
----- -----
Basin Index (%) 130 167
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 16.7 12.6 133
Cloud Peak Reservoir 9860 18.0 14.3 126 28.1 19.7 143
Grave Springs 8550 4.9 1.9 258 15.2 15.1 101
Hansen Sawmill 8360 6.9 .0 * 18.8 13.0 145
Middle Powder 7760 4.0 4.4 91 15.2 16.3 93
Powder River Pass 9480 3.6 4.7 77 18.9 17.3 109
Soldier Park 8720 8.3 -M * 22.3 -M *
----- -----
Basin Index (%) 148 120
TONGUE RIVER
Big Goose 7990 8.4 3.8 221 21.1 17.2 123
Bone Springs Div 9350 18.0 14.0 129 23.0 20.9 110
Burgess Junction 7880 6.4 7.6 84 17.0 17.0 100
Dome Lake 8880 13.9 5.4 257 24.3 19.1 127
Little Goose 8870 11.5 -M * 25.4 -M *
Sucker Creek 8880 10.5 8.1 130 20.9 20.3 103
Tie Creek 6870 2.2 .0 * 24.2 17.3 140
----- -----
Basin Index (%) 153 117
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 13.3 14.9 89
----- -----
Basin Index (%) * 89
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 13.8 16.7 83
North Rapid Creek 6130 .0 .0 * 12.1 14.6 83
----- -----
Basin Index (%) * 83
UPPER N. PLATTE
Arapaho Ridge 10960 21.2 17.3 123 31.9 28.5 112
Blackhall Mtn 9820 28.8 -M * 43.6 -M *
Columbine 9160 .9 1.7 53* 34.1 30.7 111
Divide Peak 8880 .8 4.7 17 27.4 26.5 103
Joe Wright 10120 15.0 20.7 72 36.1 33.0 109
Laprele Creek 8375 .8 .0 * 17.0 17.0 100
Med Bow 10500 35.7 -M * 42.4 -M *
North French Creek 10130 21.8 28.9 75 35.4 33.8 105
Never Summer 10280 21.3 19.7 108 24.3 -M *
Old Battle 10000 37.0 32.2 115 44.7 42.2 106
Rawah 9020 .4 .4 100* 21.5 18.9 114
Sage Creek Basin 7850 -M .0 * 18.9 17.4 109
Sand Lake 10050 30.7 27.4 112 34.0 32.0 106
South Brush Creek 8440 .0 .0 * 16.1 20.2 80
Tower 10500 40.4 47.3 85 54.4 47.9 114
Webber Springs 9250 11.8 10.9 108 38.7 32.1 121
Willow Creek Pass 9540 12.3 8.8 140 22.0 17.4 126
Zirkel 9340 11.0 8.1 136 49.1 33.4 147
----- -----
Basin Index (%) 99 112
SWEETWATER
Deer Park 9700 31.5 10.0 315 46.0 26.0 177
Larsen Creek 9000 .8 3.3 24 27.4 -M *
South Pass 9040 29.7 5.8 512 35.9 22.5 160
----- -----
Basin Index (%) 325 169
LOWER N. PLATTE
Casper Mtn. 7900 2.0 3.6 56 20.9 20.5 102
Laprele Creek 8375 .8 .0 * 17.0 17.0 100
Reno Hill 8400 2.1 2.6 81 21.1 21.5 98
Windy Peak 7900 1.6 .0 * 17.7 14.9 119
----- -----
Basin Index (%) 105 104
LARAMIE RIVER
Brooklyn Lake 10240 12.8 15.5 83 28.6 27.3 105
Cinnabar Park 9574 6.5 11.5 57 28.9 29.6 98
Crow Creek 8330 -M .0 * 15.5 15.2 102
Deadman Hill 10220 16.4 16.0 102 28.2 23.1 122
Rawah 9020 .4 .4 100* 21.5 18.9 114
Roach 9700 9.2 10.8 85 27.7 24.7 112
----- -----
Basin Index (%) 84 108
S. PLATTE
Black Mountain 8920 2.4 -M * 20.1 -M *
Crow Creek 8330 -M .0 * 15.5 15.2 102
Deadman Hill 10220 16.4 16.0 102 28.2 23.1 122
----- -----
Basin Index (%) 102* 114
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.5 18.6 110
Divide Peak 8880 .8 4.7 17 27.4 26.5 103
Elk River 8700 .4 .0 * 24.4 24.6 99
Little Snake River 8915 12.1 12.2 99 44.8 35.2 127
Old Battle 10000 37.0 32.2 115 44.7 42.2 106
Sage Creek Basin 7850 -M .0 * 18.9 17.4 109
Sandstone RS 8150 .0 .0 * 19.4 22.5 86
Whiskey Park 8950 17.9 20.9 86 36.9 33.9 109
----- -----
Basin Index (%) 97 107
UPPER GREEN RIVER
Big Sandy Opening 9080 13.2 2.2 600 27.0 16.9 160
Blind Bull Sum 8650 -M 19.4 * 39.6 23.3 170
East Rim Divide 7930 .0 .0 * 23.5 14.2 165
Elkhart Park G.S. 9400 12.5 5.2 240 27.7 16.8 165
Gros Ventre Summit 8750 -M 4.9 * -M 16.2 *
Gunsight Pass 9820 20.5 9.9 207 29.6 17.7 167
Kendall R.S. 7740 .0 .0 * 31.8 16.8 189
Loomis Park 8240 13.4 1.9 705 35.4 20.6 172
New Fork Lake 8340 -M .0 * 21.6 13.6 159
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 29.6 16.8 176
Spring Creek Divide 9000 37.9 19.7 192 45.8 28.1 163
Triple Peak 8500 23.7 7.4 320 45.5 30.3 150
----- -----
Basin Index (%) 262* 166
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 19.6 -M *
Buck Pasture 9632 4.6 -M * 28.2 -M *
EF Blacks Fork GS 9360 -M -M * 23.6 -M *
Hams Fork 7840 .0 .0 * 24.8 14.4 172
Hewinta 9500 .0 .0 * 21.7 17.8 122
Hickerson Park 9122 .2 .0 * 16.0 13.5 119
Hole-in-Rock 9168 .0 .0 * 16.7 13.1 127
Indian Creek 9425 35.8 17.8 201 46.7 27.1 172
Kelley R.S. 8180 7.7 2.1 367 35.3 21.8 162
Spirit Lk 10235 4.3 -M * 22.2 -M *
Steel Creek Park 10158 15.9 14.2 112 26.2 21.1 124
----- -----
Basin Index (%) 175* 145
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.9 -M *
Bug Lake 7987 20.6 3.8 542 38.8 23.6 164
Burts Miller Ranch 8000 .0 -M * 12.2 -M *
Chalk Creek #1 9171 23.7 14.6 162 42.1 30.9 136
Hayden Fork 9130 .1 .0 * 33.0 25.9 127
Kelley R.S. 8180 7.7 2.1 367 35.3 21.8 162
Lily Lake 9133 .0 .0 * 23.5 21.4 110
Monte Cristo 8932 28.1 13.9 202 46.3 31.6 147
Salt River Summit 7760 3.3 .0 * 32.7 20.0 164
----- -----
Basin Index (%) 243* 144
-----------------------------------------------------------------------------
-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.