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: MAY 12 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 11.4 3.3 345 42.3 23.8 178
Black Bear 8170 46.9 36.8 127 59.8 43.4 138
Blind Bull Sum 8650 -M 22.4 * 39.2 22.5 174
Cottonwood Creek 7670 21.9 12.1 181 44.1 29.1 152
East Rim Divide 7930 .1 5.4 2 23.1 13.7 169
Grand Targhee 9260 56.9 46.1 123 51.8 36.3 143
Granite Creek 6770 14.3 4.0 358 38.4 22.3 172
Grassy Lake 7265 29.1 24.6 118 61.4 40.8 150
Gros Ventre Summit 8750 16.2 9.4 172 26.7 15.5 172
Gunsight Pass 9820 21.8 12.3 177 28.6 17.2 166
Lewis Lake Divide 7850 40.3 28.5 141 59.8 40.0 150
Phillips Bench 8200 35.0 22.8 154 50.8 32.2 158
Salt River Summit 7760 7.5 3.2 234 32.0 19.3 166
Snake River Station 6920 2.1 1.1 191* 39.2 25.7 153
Spring Creek Divide 9000 41.6 23.3 179 44.9 27.4 164
Thumb Divide 7980 9.7 7.4 131 30.6 22.0 139
Togwotee Pass 9580 33.6 25.3 133 43.4 28.8 151
Two Ocean Plateau 9240 -M 29.5 * -M 31.8 *
Willow Creek 8380 -M 20.6 * 57.7 39.6 146
Younts Peak 8350 10.4 14.9 70 33.8 18.8 180
----- -----
Basin Index (%) 142 156
MADISON-GALLATIN
Black Bear 8170 46.9 36.8 127 59.8 43.4 138
Canyon 7870 11.5 6.7 172 28.9 19.1 151
Madison Plateau 7750 21.4 19.0 113 40.1 30.2 133
West Yellowstone 6700 .0 .0 * 26.0 16.8 155
Whiskey Creek 6800 6.7 9.9 68 30.0 23.3 129
----- -----
Basin Index (%) 119 139
YELLOWSTONE
Beartooth Lake 9360 33.3 22.9 145 31.8 23.3 136
Burnt Mtn 5880 .0 .0 * 18.6 18.4 101
Canyon 7870 11.5 6.7 172 28.9 19.1 151
Cole Creek 7850 13.5 17.2 78 14.3 18.6 77
Evening Star 9200 35.3 25.6 138 49.6 32.1 155
Fisher Creek 9100 46.5 34.4 135 52.9 36.9 143
Northeast Entrance 7350 .0 .6 0* 23.2 14.8 157
Parker Peak 9400 37.6 22.1 170 40.1 21.5 187
Sylvan Lake 8420 22.0 17.8 124 42.1 26.6 158
Thumb Divide 7980 9.7 7.4 131 30.6 22.0 139
Two Ocean Plateau 9240 -M 29.5 * -M 31.8 *
White Mill 8700 36.3 24.9 146 40.1 27.8 144
Wolverine 7650 .0 .0 * 23.8 14.9 160
----- -----
Basin Index (%) 137 143
WIND RIVER
Burroughs Creek 8750 12.5 -M * 29.4 -M *
Castle Creek 8400 .0 -M * 17.7 -M *
Cold Springs 9630 9.3 1.0 930 22.5 13.8 163
Deer Park 9700 32.8 14.3 229 43.5 25.3 172
Hobbs Park 10100 32.1 15.8 203 34.9 18.3 191
Kirwin 9550 20.9 10.8 194 29.4 15.1 195
Little Warm 9370 14.3 6.6 217 27.6 16.6 166
Owl Creek 8975 .4 .4 100* 15.6 9.0 173
South Pass 9040 29.3 11.2 262 33.9 21.8 156
St. Lawrence Alt 8620 .9 .6 150* 20.8 12.9 161
Togwotee Pass 9580 33.6 25.3 133 43.4 28.8 151
Townsend Creek 8700 15.1 2.8 539 28.4 16.3 174
----- -----
Basin Index (%) 212 169
BIGHORN BASIN
Bald Mtn. 9380 21.6 20.8 104 21.6 21.4 101
Bear Trap Meadow 8200 .0 .0 * 14.9 11.9 125
Bone Springs Div 9350 20.1 16.5 122 22.2 20.0 111
Grave Springs 8550 7.5 7.3 103 13.7 14.5 94
Kirwin 9550 20.9 10.8 194 29.4 15.1 195
Marquette 8760 16.1 -M * 23.9 -M *
Middle Powder 7760 8.0 10.2 78 14.5 15.6 93
Owl Creek 8975 .4 .4 100* 15.6 9.0 173
Powder River Pass 9480 6.7 8.9 75 18.2 16.5 110
Shell Creek 9580 16.8 16.8 100 18.7 17.8 105
Timber Creek 7950 .5 1.1 45 15.1 11.4 132
----- -----
Basin Index (%) 110 120
SHOSHONE RIVER
Blackwater 9780 40.3 24.5 164 46.7 24.9 188
Evening Star 9200 35.3 25.6 138 49.6 32.1 155
Marquette 8760 16.1 -M * 23.9 -M *
Sylvan Road 7120 .0 .7 0* 32.5 19.5 167
Younts Peak 8350 10.4 14.9 70 33.8 18.8 180
----- -----
Basin Index (%) 131 171
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 14.9 11.9 125
Cloud Peak Reservoir 9860 19.0 16.7 114 26.6 18.6 143
Grave Springs 8550 7.5 7.3 103 13.7 14.5 94
Hansen Sawmill 8360 10.7 .6 1783* 20.0 12.2 164
Middle Powder 7760 8.0 10.2 78 14.5 15.6 93
Powder River Pass 9480 6.7 8.9 75 18.2 16.5 110
Soldier Park 8720 13.0 -M * 20.7 -M *
----- -----
Basin Index (%) 119 121
TONGUE RIVER
Big Goose 7990 11.4 10.0 114 20.2 16.3 124
Bone Springs Div 9350 20.1 16.5 122 22.2 20.0 111
Burgess Junction 7880 9.9 11.3 88 16.1 16.3 99
Dome Lake 8880 15.9 10.9 146 22.1 18.3 121
Little Goose 8870 14.6 -M * 24.3 -M *
Sucker Creek 8880 12.6 12.5 101 19.2 19.3 99
Tie Creek 6870 .0 .9 0 19.9 16.4 121
----- -----
Basin Index (%) 113 112
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.3 14.0 88
----- -----
Basin Index (%) * 88
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.3 15.9 77
North Rapid Creek 6130 .0 .0 * 10.2 14.0 73
----- -----
Basin Index (%) * 75
UPPER N. PLATTE
Arapaho Ridge 10960 23.9 22.3 107 30.4 27.9 109
Blackhall Mtn 9820 33.4 -M * 42.2 -M *
Columbine 9160 4.8 11.2 43 32.5 29.8 109
Divide Peak 8880 3.8 13.0 29 26.3 25.7 102
Joe Wright 10120 16.7 23.2 72 34.0 31.7 107
Laprele Creek 8375 .2 1.1 18 15.7 16.3 96
Med Bow 10500 37.5 -M * 41.3 -M *
North French Creek 10130 25.1 32.5 77 34.3 32.7 105
Never Summer 10280 23.6 22.2 106 23.1 -M *
Old Battle 10000 37.4 36.8 102 43.6 41.1 106
Rawah 9020 .2 2.1 10 20.8 18.6 112
Sage Creek Basin 7850 -M .0 * 18.3 17.0 108
Sand Lake 10050 32.0 31.6 101 32.3 30.9 105
South Brush Creek 8440 .5 3.6 14 16.6 19.3 86
Tower 10500 42.8 50.9 84 51.9 46.8 111
Webber Springs 9250 17.1 18.4 93 37.5 31.3 120
Willow Creek Pass 9540 15.9 12.6 126 21.0 16.6 127
Zirkel 9340 17.1 18.9 90 47.4 32.9 144
----- -----
Basin Index (%) 87 111
SWEETWATER
Deer Park 9700 32.8 14.3 229 43.5 25.3 172
Larsen Creek 9000 3.1 5.9 53 26.2 -M *
South Pass 9040 29.3 11.2 262 33.9 21.8 156
----- -----
Basin Index (%) 208 164
LOWER N. PLATTE
Casper Mtn. 7900 5.8 10.8 54 19.6 19.7 99
Laprele Creek 8375 .2 1.1 18 15.7 16.3 96
Reno Hill 8400 5.9 9.4 63 19.9 20.6 97
Windy Peak 7900 .0 .0 * 15.4 14.0 110
----- -----
Basin Index (%) 56 100
LARAMIE RIVER
Brooklyn Lake 10240 16.8 20.8 81 27.0 26.2 103
Cinnabar Park 9574 10.2 16.7 61 27.0 28.8 94
Crow Creek 8330 .0 .0 * 12.5 14.6 86
Deadman Hill 10220 19.2 18.5 104 25.3 22.0 115
Rawah 9020 .2 2.1 10 20.8 18.6 112
Roach 9700 13.0 15.0 87 25.8 23.6 109
----- -----
Basin Index (%) 81 103
S. PLATTE
Black Mountain 8920 .7 -M * 16.8 -M *
Crow Creek 8330 .0 .0 * 12.5 14.6 86
Deadman Hill 10220 19.2 18.5 104 25.3 22.0 115
----- -----
Basin Index (%) 104* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.6 18.1 108
Divide Peak 8880 3.8 13.0 29 26.3 25.7 102
Elk River 8700 .1 6.2 2 23.2 24.0 97
Little Snake River 8915 17.5 19.8 88 43.7 34.6 126
Old Battle 10000 37.4 36.8 102 43.6 41.1 106
Sage Creek Basin 7850 -M .0 * 18.3 17.0 108
Sandstone RS 8150 -M .8 * 19.6 22.0 89
Whiskey Park 8950 22.4 26.0 86 35.4 33.2 107
----- -----
Basin Index (%) 80 106
UPPER GREEN RIVER
Big Sandy Opening 9080 15.8 8.5 186 25.8 16.3 158
Blind Bull Sum 8650 -M 22.4 * 39.2 22.5 174
East Rim Divide 7930 .1 5.4 2 23.1 13.7 169
Elkhart Park G.S. 9400 15.1 9.4 161 26.9 16.2 166
Gros Ventre Summit 8750 16.2 9.4 172 26.7 15.5 172
Gunsight Pass 9820 21.8 12.3 177 28.6 17.2 166
Kendall R.S. 7740 4.1 .0 * 31.3 16.3 192
Loomis Park 8240 16.5 6.7 246 35.2 20.0 176
New Fork Lake 8340 3.5 2.1 167 20.6 13.0 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.1 6.9 45 29.2 16.4 178
Spring Creek Divide 9000 41.6 23.3 179 44.9 27.4 164
Triple Peak 8500 28.2 14.2 199 44.9 29.4 153
----- -----
Basin Index (%) 169 168
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 19.1 -M *
Buck Pasture 9632 9.6 -M * 27.6 -M *
EF Blacks Fork GS 9360 3.8 -M * 22.9 -M *
Hams Fork 7840 .0 .0 * 24.0 14.0 171
Hewinta 9500 .0 1.1 0 21.1 17.3 122
Hickerson Park 9122 .1 .0 * 15.0 13.0 115
Hole-in-Rock 9168 .0 .0 * 15.8 12.5 126
Indian Creek 9425 37.2 21.2 175 45.2 26.4 171
Kelley R.S. 8180 11.6 7.8 149 33.9 21.3 159
Spirit Lk 10235 8.5 -M * 21.0 -M *
Steel Creek Park 10158 18.2 17.4 105 25.5 20.4 125
----- -----
Basin Index (%) 141* 145
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.5 -M *
Bug Lake 7987 23.4 11.7 200 37.7 22.9 165
Burts Miller Ranch 8000 .0 -M * 11.9 -M *
Chalk Creek #1 9171 28.6 20.7 138 41.1 30.1 137
Hayden Fork 9130 3.3 5.0 66 32.7 25.2 130
Kelley R.S. 8180 11.6 7.8 149 33.9 21.3 159
Lily Lake 9133 3.6 3.6 100 23.0 20.8 111
Monte Cristo 8932 31.8 20.6 154 44.7 30.9 145
Salt River Summit 7760 7.5 3.2 234 32.0 19.3 166
----- -----
Basin Index (%) 151 144
-----------------------------------------------------------------------------
-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.