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 THURSDAY: APRIL 27 , 2017
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7030 20.8 10.4 200 41.5 22.3 186
Black Bear 8170 51.5 37.0 139 59.4 41.1 145
Blind Bull Sum 8650 46.6 24.1 193 38.4 20.8 185
Cottonwood Creek 7670 28.8 16.7 172 42.4 26.8 158
East Rim Divide 7930 10.9 8.8 124 22.4 12.5 179
Grand Targhee 9260 54.4 43.6 125 48.6 33.6 145
Granite Creek 6770 22.2 9.0 247 37.7 20.8 181
Grassy Lake 7265 38.2 30.0 127 59.6 38.5 155
Gros Ventre Summit 8750 21.1 12.1 174 25.6 14.2 180
Gunsight Pass 9820 -M 13.3 * 27.4 15.5 177
Lewis Lake Divide 7850 48.0 30.7 156 58.7 37.8 155
Phillips Bench 8200 40.7 25.6 159 49.6 30.0 165
Salt River Summit 7760 17.5 8.2 213 -M 18.0 *
Snake River Station 6920 13.9 9.4 148 38.6 24.2 160
Spring Creek Divide 9000 43.6 24.0 182 43.3 25.6 169
Thumb Divide 7980 20.1 13.9 145 30.1 20.4 148
Togwotee Pass 9580 35.8 24.6 146 41.6 26.6 156
Two Ocean Plateau 9240 -M 29.3 * -M 29.5 *
Willow Creek 8380 28.9 24.9 116 55.8 36.7 152
Younts Peak 8350 24.3 15.1 161 32.9 17.2 191
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Basin Index (%) 154 162
MADISON-GALLATIN
Black Bear 8170 51.5 37.0 139 59.4 41.1 145
Canyon 7870 18.7 11.5 163 28.4 17.6 161
Madison Plateau 7750 29.7 22.2 134 39.7 28.3 140
West Yellowstone 6700 .7 4.2 17 25.8 15.6 165
Whiskey Creek 6800 12.8 15.4 83 29.3 21.9 134
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Basin Index (%) 126 147
YELLOWSTONE
Beartooth Lake 9360 35.6 23.4 152 30.4 21.4 142
Burnt Mtn 5880 .0 .0 * 16.8 15.0 112
Canyon 7870 18.7 11.5 163 28.4 17.6 161
Cole Creek 7850 14.2 16.3 87 11.5 15.7 73
Evening Star 9200 41.1 24.6 167 48.0 29.7 162
Fisher Creek 9100 47.2 33.2 142 51.3 34.4 149
Northeast Entrance 7350 3.4 4.6 74 22.6 13.4 169
Parker Peak 9400 41.7 21.8 191 38.9 19.6 198
Sylvan Lake 8420 26.4 20.3 130 41.2 24.5 168
Thumb Divide 7980 20.1 13.9 145 30.1 20.4 148
Two Ocean Plateau 9240 -M 29.3 * -M 29.5 *
White Mill 8700 40.5 23.7 171 39.0 25.7 152
Wolverine 7650 3.1 4.8 65 23.0 13.4 172
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Basin Index (%) 147 152
WIND RIVER
Burroughs Creek 8750 20.0 -M * 28.5 -M *
Castle Creek 8400 7.8 -M * 17.2 -M *
Cold Springs 9630 15.4 2.4 642 21.0 11.9 176
Deer Park 9700 34.9 16.3 214 41.3 22.9 180
Hobbs Park 10100 32.4 15.8 205 31.7 16.2 196
Kirwin 9550 24.5 10.2 240 27.5 13.3 207
Little Warm 9370 18.9 9.2 205 26.2 14.7 178
Owl Creek 8975 8.2 2.0 410 14.4 7.5 192
South Pass 9040 31.9 15.2 210 30.9 19.8 156
St. Lawrence Alt 8620 7.6 4.2 181 19.0 11.0 173
Togwotee Pass 9580 35.8 24.6 146 41.6 26.6 156
Townsend Creek 8700 17.6 8.4 210 25.3 14.5 174
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Basin Index (%) 210 176
BIGHORN BASIN
Bald Mtn. 9380 22.6 20.6 110 19.7 19.1 103
Bear Trap Meadow 8200 6.5 1.6 406 13.8 10.1 137
Bone Springs Div 9350 22.6 16.5 137 20.4 17.6 116
Grave Springs 8550 10.1 9.1 111 12.0 12.3 98
Kirwin 9550 24.5 10.2 240 27.5 13.3 207
Marquette 8760 16.8 -M * 20.7 -M *
Middle Powder 7760 12.3 12.2 101 13.2 13.7 96
Owl Creek 8975 8.2 2.0 410 14.4 7.5 192
Powder River Pass 9480 10.7 10.0 107 16.4 14.5 113
Shell Creek 9580 19.8 15.9 125 17.3 15.7 110
Timber Creek 7950 6.6 3.6 183 13.3 9.3 143
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Basin Index (%) 141 126
SHOSHONE RIVER
Blackwater 9780 40.9 24.7 166 45.0 22.8 197
Evening Star 9200 41.1 24.6 167 48.0 29.7 162
Marquette 8760 16.8 -M * 20.7 -M *
Sylvan Road 7120 .1 7.5 1 32.3 18.1 178
Younts Peak 8350 24.3 15.1 161 32.9 17.2 191
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Basin Index (%) 148 180
POWDER RIVER
Bear Trap Meadow 8200 6.5 1.6 406 13.8 10.1 137
Cloud Peak Reservoir 9860 20.0 16.5 121 24.2 16.0 151
Grave Springs 8550 10.1 9.1 111 12.0 12.3 98
Hansen Sawmill 8360 14.1 3.8 371 19.0 10.3 184
Middle Powder 7760 12.3 12.2 101 13.2 13.7 96
Powder River Pass 9480 10.7 10.0 107 16.4 14.5 113
Soldier Park 8720 16.6 -M * 18.5 -M *
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Basin Index (%) 139 128
TONGUE RIVER
Big Goose 7990 13.4 9.1 147 17.7 13.5 131
Bone Springs Div 9350 22.6 16.5 137 20.4 17.6 116
Burgess Junction 7880 12.2 12.3 99 14.3 14.3 100
Dome Lake 8880 18.0 11.7 154 20.1 15.9 126
Little Goose 8870 16.9 -M * 21.7 -M *
Sucker Creek 8880 14.7 12.5 118 16.9 16.7 101
Tie Creek 6870 2.3 3.0 77 17.2 13.7 126
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Basin Index (%) 128 116
BELLE FOURCHE
Cole Canyon 5910 1.3 .4 325* 10.9 11.2 97
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Basin Index (%) 325* 97
CHEYENNE RIVER BASIN
Blind Park 6890 .0 2.7 0 10.7 13.8 78
North Rapid Creek 6130 .0 2.7 0 9.4 11.8 80
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Basin Index (%) 0 79
UPPER N. PLATTE
Arapaho Ridge 10960 25.4 22.1 115 28.6 25.7 111
Blackhall Mtn 9820 36.2 -M * 40.8 -M *
Columbine 9160 11.6 19.9 58 30.1 27.9 108
Divide Peak 8880 11.4 17.9 64 24.8 23.8 104
Joe Wright 10120 18.0 23.4 77 31.7 29.2 109
Laprele Creek 8375 6.1 7.1 86 14.0 14.6 96
Med Bow 10500 38.1 -M * 38.8 -M *
North French Creek 10130 26.4 32.9 80 31.3 30.0 104
Never Summer 10280 24.3 21.4 114 21.8 -M *
Old Battle 10000 38.8 34.4 113 41.1 38.4 107
Rawah 9020 5.4 7.8 69 19.7 16.8 117
Sage Creek Basin 7850 -M 1.7 * 17.6 15.8 111
Sand Lake 10050 31.9 31.2 102 30.5 28.4 107
South Brush Creek 8440 .3 10.0 3 14.5 17.4 83
Tower 10500 43.2 49.7 87 48.0 43.8 110
Webber Springs 9250 22.4 22.0 102 35.8 29.4 122
Willow Creek Pass 9540 18.7 13.8 136 19.9 15.3 130
Zirkel 9340 23.9 21.9 109 45.2 30.5 148
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Basin Index (%) 92 112
SWEETWATER
Deer Park 9700 34.9 16.3 214 41.3 22.9 180
Larsen Creek 9000 13.2 9.6 138 25.5 -M *
South Pass 9040 31.9 15.2 210 30.9 19.8 156
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Basin Index (%) 195 169
LOWER N. PLATTE
Casper Mtn. 7900 11.3 14.1 80 16.7 17.5 95
Laprele Creek 8375 6.1 7.1 86 14.0 14.6 96
Reno Hill 8400 12.3 13.6 90 17.2 18.3 94
Windy Peak 7900 3.8 5.5 69 13.1 12.6 104
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Basin Index (%) 83 97
LARAMIE RIVER
Brooklyn Lake 10240 20.3 23.0 88 24.9 24.1 103
Cinnabar Park 9574 13.1 20.1 65 24.8 26.4 94
Crow Creek 8330 .0 .0 * 11.5 13.0 88
Deadman Hill 10220 21.0 18.5 114 23.2 20.1 115
Rawah 9020 5.4 7.8 69 19.7 16.8 117
Roach 9700 15.3 17.0 90 23.5 21.7 108
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Basin Index (%) 87 105
S. PLATTE
Black Mountain 8920 7.8 -M * 15.2 -M *
Crow Creek 8330 .0 .0 * 11.5 13.0 88
Deadman Hill 10220 21.0 18.5 114 23.2 20.1 115
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Basin Index (%) 114* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 1.0 0* 19.1 16.8 114
Divide Peak 8880 11.4 17.9 64 24.8 23.8 104
Elk River 8700 5.5 14.3 38 22.6 22.2 102
Little Snake River 8915 22.7 23.1 98 42.2 32.0 132
Old Battle 10000 38.8 34.4 113 41.1 38.4 107
Sage Creek Basin 7850 -M 1.7 * 17.6 15.8 111
Sandstone RS 8150 .0 7.7 0 17.9 20.3 88
Whiskey Park 8950 23.9 25.7 93 33.8 30.8 110
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Basin Index (%) 82 109
UPPER GREEN RIVER
Big Sandy Opening 9080 23.0 11.8 195 25.4 14.8 172
Blind Bull Sum 8650 46.6 24.1 193 38.4 20.8 185
East Rim Divide 7930 10.9 8.8 124 22.4 12.5 179
Elkhart Park G.S. 9400 20.8 11.8 176 26.0 14.6 178
Gros Ventre Summit 8750 21.1 12.1 174 25.6 14.2 180
Gunsight Pass 9820 -M 13.3 * 27.4 15.5 177
Kendall R.S. 7740 15.5 5.9 263 30.5 15.1 202
Loomis Park 8240 24.4 11.5 212 33.8 18.5 183
New Fork Lake 8340 12.8 7.1 180 19.2 11.7 164
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.3 10.0 163 28.6 15.2 188
Spring Creek Divide 9000 43.6 24.0 182 43.3 25.6 169
Triple Peak 8500 36.0 18.8 191 43.5 27.3 159
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Basin Index (%) 186 177
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.8 -M * 18.0 -M *
Buck Pasture 9632 15.8 -M * 26.0 -M *
EF Blacks Fork GS 9360 11.8 -M * 20.0 -M *
Hams Fork 7840 9.6 4.4 218 23.2 12.7 183
Hewinta 9500 6.6 6.1 108 19.8 15.7 126
Hickerson Park 9122 4.3 5.0 86 14.2 11.7 121
Hole-in-Rock 9168 4.6 4.2 110 15.0 11.2 134
Indian Creek 9425 43.0 23.8 181 43.9 24.4 180
Kelley R.S. 8180 24.1 11.8 204 33.0 19.7 168
Spirit Lk 10235 15.1 -M * 20.1 -M *
Steel Creek Park 10158 21.4 16.7 128 23.9 18.6 128
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Basin Index (%) 158 152
UPPER BEAR RIVER
Bear River RS 8777 1.2 -M * 20.5 -M *
Bug Lake 7987 32.4 16.1 201 36.5 21.1 173
Burts Miller Ranch 8000 .0 -M * 11.5 -M *
Chalk Creek #1 9171 33.3 24.7 135 39.8 27.8 143
Hayden Fork 9130 14.7 10.1 146 32.8 23.2 141
Kelley R.S. 8180 24.1 11.8 204 33.0 19.7 168
Lily Lake 9133 12.0 9.7 124 22.2 19.0 117
Monte Cristo 8932 37.5 27.3 137 43.2 28.5 152
Salt River Summit 7760 17.5 8.2 213 -M 18.0 *
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Basin Index (%) 159 149
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-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.
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-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.