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: APRIL 17 , 2017
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7030 22.1 12.5 177 40.1 21.5 187
Black Bear 8170 47.6 36.8 129 55.6 39.3 141
Blind Bull Sum 8650 44.0 23.9 184 -M 20.0 *
Cottonwood Creek 7670 27.0 19.3 140 39.2 25.3 155
East Rim Divide 7930 13.2 9.7 136 21.3 12.1 176
Grand Targhee 9260 48.2 41.5 116 43.2 32.3 134
Granite Creek 6770 23.5 11.7 201 36.4 20.1 181
Grassy Lake 7265 37.1 31.6 117 56.2 36.9 152
Gros Ventre Summit 8750 20.2 13.1 154 24.9 13.5 184
Gunsight Pass 9820 23.7 13.4 177 25.7 14.6 176
Lewis Lake Divide 7850 45.7 30.2 151 56.6 36.4 155
Phillips Bench 8200 38.2 25.9 147 47.4 28.8 165
Salt River Summit 7760 18.7 10.6 176 29.8 17.1 174
Snake River Station 6920 15.9 12.1 131 36.3 23.2 156
Spring Creek Divide 9000 41.6 23.4 178 41.2 24.4 169
Thumb Divide 7980 21.0 14.4 146 28.4 19.3 147
Togwotee Pass 9580 33.7 23.3 145 39.4 25.2 156
Two Ocean Plateau 9240 -M 27.6 * -M 28.1 *
Willow Creek 8380 27.6 26.7 103 51.1 34.7 147
Younts Peak 8350 25.1 14.9 168 31.7 16.4 193
----- -----
Basin Index (%) 145 160
MADISON-GALLATIN
Black Bear 8170 47.6 36.8 129 55.6 39.3 141
Canyon 7870 17.8 12.4 144 26.3 16.8 157
Madison Plateau 7750 28.0 22.7 123 37.4 27.1 138
West Yellowstone 6700 3.9 8.1 48 23.9 14.7 163
Whiskey Creek 6800 13.1 14.9 88 27.8 20.9 133
----- -----
Basin Index (%) 116 144
YELLOWSTONE
Beartooth Lake 9360 33.4 22.8 146 28.7 20.4 141
Burnt Mtn 5880 .1 .0 * 15.0 13.7 109
Canyon 7870 17.8 12.4 144 26.3 16.8 157
Cole Creek 7850 12.0 15.9 75 9.5 14.2 67
Evening Star 9200 38.9 25.0 156 45.7 28.3 161
Fisher Creek 9100 44.3 32.1 138 48.6 32.9 148
Northeast Entrance 7350 4.9 7.6 64 20.9 12.7 165
Parker Peak 9400 37.1 20.7 179 35.3 18.4 192
Sylvan Lake 8420 24.3 20.2 120 38.1 23.2 164
Thumb Divide 7980 21.0 14.4 146 28.4 19.3 147
Two Ocean Plateau 9240 -M 27.6 * -M 28.1 *
White Mill 8700 37.4 23.6 158 37.0 24.6 150
Wolverine 7650 3.4 8.1 42 21.2 12.6 168
----- -----
Basin Index (%) 135 150
WIND RIVER
Burroughs Creek 8750 21.5 -M * 28.0 -M *
Castle Creek 8400 9.1 -M * 15.7 -M *
Cold Springs 9630 16.3 5.4 302 20.4 10.6 192
Deer Park 9700 32.7 16.0 204 38.5 21.0 183
Hobbs Park 10100 29.9 14.8 202 29.1 14.4 202
Kirwin 9550 22.4 10.0 224 25.9 12.2 212
Little Warm 9370 18.8 10.2 184 25.4 13.6 187
Owl Creek 8975 9.4 4.7 200 13.4 6.6 203
South Pass 9040 31.6 15.7 201 29.2 18.2 160
St. Lawrence Alt 8620 8.8 6.0 147 17.5 9.6 182
Togwotee Pass 9580 33.7 23.3 145 39.4 25.2 156
Townsend Creek 8700 17.6 9.8 180 23.8 12.9 184
----- -----
Basin Index (%) 191 182
BIGHORN BASIN
Bald Mtn. 9380 20.8 19.5 107 18.1 17.9 101
Bear Trap Meadow 8200 4.3 4.0 108 9.7 9.2 105
Bone Springs Div 9350 20.6 16.4 126 18.8 16.4 115
Grave Springs 8550 7.0 9.6 73 8.7 11.3 77
Kirwin 9550 22.4 10.0 224 25.9 12.2 212
Marquette 8760 14.2 -M * 18.2 -M *
Middle Powder 7760 8.5 12.5 68 8.5 12.5 68
Owl Creek 8975 9.4 4.7 200 13.4 6.6 203
Powder River Pass 9480 9.2 10.1 91 14.4 13.4 107
Shell Creek 9580 18.6 15.3 122 16.0 14.5 110
Timber Creek 7950 7.2 5.1 141 11.9 8.1 147
----- -----
Basin Index (%) 119 119
SHOSHONE RIVER
Blackwater 9780 38.7 23.7 163 43.1 21.5 200
Evening Star 9200 38.9 25.0 156 45.7 28.3 161
Marquette 8760 14.2 -M * 18.2 -M *
Sylvan Road 7120 2.1 10.2 21 31.0 17.2 180
Younts Peak 8350 25.1 14.9 168 31.7 16.4 193
----- -----
Basin Index (%) 142 182
POWDER RIVER
Bear Trap Meadow 8200 4.3 4.0 108 9.7 9.2 105
Cloud Peak Reservoir 9860 17.0 15.5 110 20.3 14.4 141
Grave Springs 8550 7.0 9.6 73 8.7 11.3 77
Hansen Sawmill 8360 11.3 5.4 209 15.6 9.3 168
Middle Powder 7760 8.5 12.5 68 8.5 12.5 68
Powder River Pass 9480 9.2 10.1 91 14.4 13.4 107
Soldier Park 8720 14.9 -M * 15.7 -M *
----- -----
Basin Index (%) 100 110
TONGUE RIVER
Big Goose 7990 12.0 9.6 125 15.3 12.2 125
Bone Springs Div 9350 20.6 16.4 126 18.8 16.4 115
Burgess Junction 7880 11.1 12.2 91 12.9 13.1 98
Dome Lake 8880 16.7 11.9 140 17.7 14.5 122
Little Goose 8870 14.6 -M * 18.6 -M *
Sucker Creek 8880 13.5 12.7 106 15.1 15.4 98
Tie Creek 6870 1.2 4.5 27 14.4 12.4 116
----- -----
Basin Index (%) 112 112
BELLE FOURCHE
Cole Canyon 5910 .0 2.6 0 7.8 10.1 77
----- -----
Basin Index (%) 0 77
CHEYENNE RIVER BASIN
Blind Park 6890 .0 4.6 0 9.7 12.5 78
North Rapid Creek 6130 .0 4.8 0 8.1 10.5 77
----- -----
Basin Index (%) 0 77
UPPER N. PLATTE
Arapaho Ridge 10960 24.5 21.5 114 26.4 23.9 110
Blackhall Mtn 9820 35.0 -M * 38.2 -M *
Columbine 9160 13.0 21.2 61 27.6 26.6 104
Divide Peak 8880 12.8 19.6 65 23.3 22.4 104
Joe Wright 10120 16.3 22.1 74 28.7 27.2 106
Laprele Creek 8375 7.3 8.8 83 12.7 13.3 95
Med Bow 10500 35.1 -M * 35.7 -M *
North French Creek 10130 24.0 32.0 75 27.9 28.0 100
Never Summer 10280 21.9 20.6 106 19.6 -M *
Old Battle 10000 36.4 32.3 113 38.9 36.4 107
Rawah 9020 5.2 9.2 57 17.4 15.3 114
Sage Creek Basin 7850 -M 7.6 * 16.9 15.0 113
Sand Lake 10050 30.4 30.4 100 28.2 26.2 108
South Brush Creek 8440 -M 10.3 * 12.9 16.1 80
Tower 10500 37.8 47.5 80 44.2 41.4 107
Webber Springs 9250 25.2 22.8 111 33.8 27.9 121
Willow Creek Pass 9540 18.1 12.7 143 18.6 14.1 132
Zirkel 9340 27.2 23.2 117 42.4 29.5 144
----- -----
Basin Index (%) 93 110
SWEETWATER
Deer Park 9700 32.7 16.0 204 38.5 21.0 183
Larsen Creek 9000 13.4 10.6 126 23.5 -M *
South Pass 9040 31.6 15.7 201 29.2 18.2 160
----- -----
Basin Index (%) 184 173
LOWER N. PLATTE
Casper Mtn. 7900 10.4 14.4 72 13.6 16.1 84
Laprele Creek 8375 7.3 8.8 83 12.7 13.3 95
Reno Hill 8400 12.1 14.1 86 15.3 16.6 92
Windy Peak 7900 5.5 7.1 77 11.9 11.3 105
----- -----
Basin Index (%) 80 93
LARAMIE RIVER
Brooklyn Lake 10240 21.1 22.1 95 23.5 22.3 105
Cinnabar Park 9574 14.0 20.7 68 22.6 25.0 90
Crow Creek 8330 .0 2.3 0 9.2 11.7 79
Deadman Hill 10220 20.7 16.5 125 20.8 18.4 113
Rawah 9020 5.2 9.2 57 17.4 15.3 114
Roach 9700 15.2 16.5 92 21.6 20.2 107
----- -----
Basin Index (%) 87 102
S. PLATTE
Black Mountain 8920 8.8 -M * 13.3 -M *
Crow Creek 8330 .0 2.3 0 9.2 11.7 79
Deadman Hill 10220 20.7 16.5 125 20.8 18.4 113
----- -----
Basin Index (%) 110 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 5.8 0 17.0 15.7 108
Divide Peak 8880 12.8 19.6 65 23.3 22.4 104
Elk River 8700 8.4 16.5 51 20.5 20.9 98
Little Snake River 8915 23.1 25.3 91 39.1 30.9 127
Old Battle 10000 36.4 32.3 113 38.9 36.4 107
Sage Creek Basin 7850 -M 7.6 * 16.9 15.0 113
Sandstone RS 8150 1.3 11.1 12 16.2 19.1 85
Whiskey Park 8950 22.7 26.5 86 30.5 29.1 105
----- -----
Basin Index (%) 76 107
UPPER GREEN RIVER
Big Sandy Opening 9080 20.7 12.8 162 23.5 13.8 170
Blind Bull Sum 8650 44.0 23.9 184 -M 20.0 *
East Rim Divide 7930 13.2 9.7 136 21.3 12.1 176
Elkhart Park G.S. 9400 19.7 12.0 164 24.8 13.8 180
Gros Ventre Summit 8750 20.2 13.1 154 24.9 13.5 184
Gunsight Pass 9820 23.7 13.4 177 25.7 14.6 176
Kendall R.S. 7740 17.3 9.3 186 29.4 14.6 201
Loomis Park 8240 25.4 13.3 191 32.7 17.7 185
New Fork Lake 8340 13.6 9.3 146 18.4 11.1 166
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.9 11.3 150 27.9 14.6 191
Spring Creek Divide 9000 41.6 23.4 178 41.2 24.4 169
Triple Peak 8500 35.5 19.3 184 41.7 26.0 160
----- -----
Basin Index (%) 171 177
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.6 -M * 16.5 -M *
Buck Pasture 9632 16.1 -M * 24.2 -M *
EF Blacks Fork GS 9360 12.5 -M * 18.0 -M *
Hams Fork 7840 11.4 7.8 146 22.0 11.8 186
Hewinta 9500 7.4 9.1 81 18.0 14.6 123
Hickerson Park 9122 6.9 6.1 113 13.5 10.8 125
Hole-in-Rock 9168 6.4 6.4 100 14.0 10.3 136
Indian Creek 9425 40.5 23.5 172 41.8 23.2 180
Kelley R.S. 8180 24.5 13.4 183 31.2 18.6 168
Spirit Lk 10235 15.6 -M * 19.1 -M *
Steel Creek Park 10158 19.2 16.1 119 21.7 17.4 125
----- -----
Basin Index (%) 141 152
UPPER BEAR RIVER
Bear River RS 8777 4.7 -M * 19.1 -M *
Bug Lake 7987 32.2 18.4 175 34.8 20.0 174
Burts Miller Ranch 8000 .0 -M * 10.6 -M *
Chalk Creek #1 9171 32.7 24.9 131 37.1 26.3 141
Hayden Fork 9130 15.4 13.0 118 30.4 22.0 138
Kelley R.S. 8180 24.5 13.4 183 31.2 18.6 168
Lily Lake 9133 11.8 11.7 101 20.4 17.9 114
Monte Cristo 8932 36.2 27.6 131 40.6 26.9 151
Salt River Summit 7760 18.7 10.6 176 29.8 17.1 174
----- -----
Basin Index (%) 143 151
-----------------------------------------------------------------------------
-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.