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 7 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 16.0 6.1 262 42.2 23.4 180
Black Bear 8170 50.1 37.0 135 59.8 42.6 140
Blind Bull Sum 8650 -M 22.6 * 39.1 21.9 179
Cottonwood Creek 7670 26.6 13.5 197 44.1 28.3 156
East Rim Divide 7930 4.1 6.9 59 22.6 13.3 170
Grand Targhee 9260 58.4 46.4 126 51.4 35.7 144
Granite Creek 6770 16.7 6.7 249 38.4 21.9 175
Grassy Lake 7265 35.3 27.0 131 61.5 40.1 153
Gros Ventre Summit 8750 19.1 10.2 187 26.5 15.1 175
Gunsight Pass 9820 24.8 11.7 212 28.2 16.5 171
Lewis Lake Divide 7850 44.5 29.4 151 59.8 39.3 152
Phillips Bench 8200 39.5 23.6 167 50.8 31.4 162
Salt River Summit 7760 13.4 6.2 216 31.9 18.8 170
Snake River Station 6920 8.3 4.0 208 39.3 25.3 155
Spring Creek Divide 9000 45.0 24.1 187 44.6 26.8 166
Thumb Divide 7980 15.3 9.7 158 30.5 21.5 142
Togwotee Pass 9580 35.9 25.0 144 43.1 28.1 153
Two Ocean Plateau 9240 -M 29.8 * -M 30.8 *
Willow Creek 8380 25.8 21.7 119 57.6 38.6 149
Younts Peak 8350 18.2 15.6 117 33.7 18.3 184
----- -----
Basin Index (%) 153 159
MADISON-GALLATIN
Black Bear 8170 50.1 37.0 135 59.8 42.6 140
Canyon 7870 15.5 8.2 189 28.9 18.5 156
Madison Plateau 7750 26.4 20.7 128 40.0 29.6 135
West Yellowstone 6700 .0 .0 * 26.0 16.4 159
Whiskey Creek 6800 9.8 11.9 82 29.9 22.8 131
----- -----
Basin Index (%) 131 142
YELLOWSTONE
Beartooth Lake 9360 35.6 22.9 155 31.8 22.7 140
Burnt Mtn 5880 .0 .0 * 18.4 16.6 111
Canyon 7870 15.5 8.2 189 28.9 18.5 156
Cole Creek 7850 16.8 16.9 99 14.3 17.2 83
Evening Star 9200 37.9 25.1 151 49.3 31.3 158
Fisher Creek 9100 46.8 33.4 140 52.7 36.1 146
Northeast Entrance 7350 .0 1.0 0 23.1 14.3 162
Parker Peak 9400 41.8 21.6 194 40.1 20.7 194
Sylvan Lake 8420 25.1 18.4 136 42.0 25.9 162
Thumb Divide 7980 15.3 9.7 158 30.5 21.5 142
Two Ocean Plateau 9240 -M 29.8 * -M 30.8 *
White Mill 8700 40.3 24.3 166 40.0 27.0 148
Wolverine 7650 -M .5 * 23.8 14.2 168
----- -----
Basin Index (%) 152 148
WIND RIVER
Burroughs Creek 8750 16.0 -M * 29.3 -M *
Castle Creek 8400 2.8 -M * 17.3 -M *
Cold Springs 9630 12.7 1.6 794 22.5 13.1 172
Deer Park 9700 35.2 14.7 239 43.4 24.2 179
Hobbs Park 10100 34.9 15.9 219 34.5 17.4 198
Kirwin 9550 23.8 10.8 220 29.3 14.5 202
Little Warm 9370 17.2 7.1 242 27.2 15.9 171
Owl Creek 8975 4.2 .5 840* 15.3 8.4 182
South Pass 9040 32.7 13.1 250 33.8 21.0 161
St. Lawrence Alt 8620 6.2 1.5 413 20.6 12.1 170
Togwotee Pass 9580 35.9 25.0 144 43.1 28.1 153
Townsend Creek 8700 17.7 5.2 340 28.2 15.5 182
----- -----
Basin Index (%) 231 175
BIGHORN BASIN
Bald Mtn. 9380 22.8 20.4 112 21.5 20.4 105
Bear Trap Meadow 8200 3.9 .2 1950* 14.9 11.3 132
Bone Springs Div 9350 22.7 16.4 138 21.7 19.0 114
Grave Springs 8550 10.1 8.5 119 13.7 13.6 101
Kirwin 9550 23.8 10.8 220 29.3 14.5 202
Marquette 8760 18.9 -M * 23.8 -M *
Middle Powder 7760 11.8 11.2 105 14.2 14.8 96
Owl Creek 8975 4.2 .5 840* 15.3 8.4 182
Powder River Pass 9480 9.8 9.0 109 18.2 15.8 115
Shell Creek 9580 18.5 16.4 113 18.5 17.0 109
Timber Creek 7950 4.5 1.9 237 15.0 10.6 142
----- -----
Basin Index (%) 139 125
SHOSHONE RIVER
Blackwater 9780 41.5 25.5 163 46.4 24.2 192
Evening Star 9200 37.9 25.1 151 49.3 31.3 158
Marquette 8760 18.9 -M * 23.8 -M *
Sylvan Road 7120 .0 2.9 0 32.3 19.0 170
Younts Peak 8350 18.2 15.6 117 33.7 18.3 184
----- -----
Basin Index (%) 141 174
POWDER RIVER
Bear Trap Meadow 8200 3.9 .2 1950* 14.9 11.3 132
Cloud Peak Reservoir 9860 20.5 16.5 124 26.5 17.5 151
Grave Springs 8550 10.1 8.5 119 13.7 13.6 101
Hansen Sawmill 8360 13.2 1.5 880 18.9 11.4 166
Middle Powder 7760 11.8 11.2 105 14.2 14.8 96
Powder River Pass 9480 9.8 9.0 109 18.2 15.8 115
Soldier Park 8720 15.6 -M * 20.5 -M *
----- -----
Basin Index (%) 148 126
TONGUE RIVER
Big Goose 7990 13.4 10.1 133 20.1 15.1 133
Bone Springs Div 9350 22.7 16.4 138 21.7 19.0 114
Burgess Junction 7880 12.0 11.4 105 15.9 15.5 103
Dome Lake 8880 18.6 11.2 166 22.0 17.2 128
Little Goose 8870 16.9 -M * 24.0 -M *
Sucker Creek 8880 14.4 12.1 119 19.1 18.3 104
Tie Creek 6870 1.7 2.1 81 19.7 15.1 130
----- -----
Basin Index (%) 131 118
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 12.3 12.9 95
----- -----
Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.6 14.9 78
North Rapid Creek 6130 .0 .0 * 10.0 12.9 78
----- -----
Basin Index (%) * 78
UPPER N. PLATTE
Arapaho Ridge 10960 25.1 22.3 113 29.8 26.9 111
Blackhall Mtn 9820 35.9 -M * -M -M *
Columbine 9160 9.7 15.1 64 32.2 29.3 110
Divide Peak 8880 9.2 16.3 56 26.1 25.0 104
Joe Wright 10120 18.0 22.9 79 33.4 30.8 108
Laprele Creek 8375 2.4 4.6 52 15.6 15.6 100
Med Bow 10500 38.7 -M * 41.2 -M *
North French Creek 10130 27.2 32.8 83 34.1 31.6 108
Never Summer 10280 24.5 22.0 111 22.7 -M *
Old Battle 10000 39.4 35.8 110 43.3 40.2 108
Rawah 9020 2.8 3.8 74 20.7 17.8 116
Sage Creek Basin 7850 -M .2 * 17.9 16.6 108
Sand Lake 10050 33.2 31.8 104 32.3 29.9 108
South Brush Creek 8440 .6 6.7 9 16.7 18.5 90
Tower 10500 44.5 51.3 87 51.1 45.9 111
Webber Springs 9250 22.1 20.5 108 37.0 30.6 121
Willow Creek Pass 9540 18.1 14.3 127 20.6 16.2 127
Zirkel 9340 22.0 20.2 109 46.8 31.8 147
----- -----
Basin Index (%) 93 113
SWEETWATER
Deer Park 9700 35.2 14.7 239 43.4 24.2 179
Larsen Creek 9000 8.3 7.4 112 26.0 -M *
South Pass 9040 32.7 13.1 250 33.8 21.0 161
----- -----
Basin Index (%) 216 171
LOWER N. PLATTE
Casper Mtn. 7900 11.0 11.9 92 18.8 18.9 99
Laprele Creek 8375 2.4 4.6 52 15.6 15.6 100
Reno Hill 8400 11.2 11.8 95 19.1 19.7 97
Windy Peak 7900 .7 2.0 35 14.1 13.5 104
----- -----
Basin Index (%) 83 100
LARAMIE RIVER
Brooklyn Lake 10240 19.8 22.2 89 26.8 25.5 105
Cinnabar Park 9574 12.9 18.1 71 26.8 27.9 96
Crow Creek 8330 .0 .0 * 12.3 14.1 87
Deadman Hill 10220 21.3 18.9 113 24.9 21.3 117
Rawah 9020 2.8 3.8 74 20.7 17.8 116
Roach 9700 15.2 16.6 92 25.3 23.0 110
----- -----
Basin Index (%) 90 106
S. PLATTE
Black Mountain 8920 4.8 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 12.3 14.1 87
Deadman Hill 10220 21.3 18.9 113 24.9 21.3 117
----- -----
Basin Index (%) 113* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 19.5 17.5 111
Divide Peak 8880 9.2 16.3 56 26.1 25.0 104
Elk River 8700 1.2 10.1 12 23.1 23.4 99
Little Snake River 8915 21.2 21.0 101 43.6 33.7 129
Old Battle 10000 39.4 35.8 110 43.3 40.2 108
Sage Creek Basin 7850 -M .2 * 17.9 16.6 108
Sandstone RS 8150 -M 3.2 * 19.4 21.3 91
Whiskey Park 8950 23.3 27.1 86 35.3 32.3 109
----- -----
Basin Index (%) 85 109
UPPER GREEN RIVER
Big Sandy Opening 9080 20.0 8.7 230 25.7 15.8 163
Blind Bull Sum 8650 -M 22.6 * 39.1 21.9 179
East Rim Divide 7930 4.1 6.9 59 22.6 13.3 170
Elkhart Park G.S. 9400 18.8 10.0 188 26.3 15.6 169
Gros Ventre Summit 8750 19.1 10.2 187 26.5 15.1 175
Gunsight Pass 9820 24.8 11.7 212 28.2 16.5 171
Kendall R.S. 7740 9.9 .7 1414* 30.6 15.9 192
Loomis Park 8240 20.2 8.4 240 34.6 19.5 177
New Fork Lake 8340 8.0 4.0 200 19.9 12.6 158
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M 7.9 * 29.3 16.0 183
Spring Creek Divide 9000 45.0 24.1 187 44.6 26.8 166
Triple Peak 8500 33.9 15.4 220 44.9 28.7 156
----- -----
Basin Index (%) 204 171
LOWER GREEN RIVER
Blacks Fork Jct 8869 .9 -M * 18.8 -M *
Buck Pasture 9632 13.7 -M * 27.3 -M *
EF Blacks Fork GS 9360 8.9 -M * 21.7 -M *
Hams Fork 7840 4.4 .5 880* 23.9 13.5 177
Hewinta 9500 3.4 3.4 100 21.0 16.8 125
Hickerson Park 9122 .3 1.8 17 14.9 12.5 119
Hole-in-Rock 9168 .0 1.0 0 15.7 12.0 131
Indian Creek 9425 41.5 21.3 195 45.1 25.6 176
Kelley R.S. 8180 17.6 9.2 191 33.7 20.7 163
Spirit Lk 10235 13.1 -M * 21.0 -M *
Steel Creek Park 10158 21.0 17.6 119 25.3 19.8 128
----- -----
Basin Index (%) 161 149
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 21.3 -M *
Bug Lake 7987 30.0 12.8 234 37.7 22.3 169
Burts Miller Ranch 8000 .0 -M * 12.0 -M *
Chalk Creek #1 9171 33.0 22.5 147 41.1 29.3 140
Hayden Fork 9130 9.2 7.1 130 33.2 24.5 136
Kelley R.S. 8180 17.6 9.2 191 33.7 20.7 163
Lily Lake 9133 8.8 7.8 113 23.0 20.2 114
Monte Cristo 8932 36.9 23.3 158 44.7 30.1 149
Salt River Summit 7760 13.4 6.2 216 31.9 18.8 170
----- -----
Basin Index (%) 167 148
-----------------------------------------------------------------------------
-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.