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 WEDNESDAY: APRIL 19 , 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 21.8 12.0 182 40.3 21.7 186
Black Bear 8170 48.2 36.8 131 56.1 39.6 142
Blind Bull Sum 8650 44.3 24.0 185 -M 20.1 *
Cottonwood Creek 7670 27.1 18.8 144 39.8 25.7 155
East Rim Divide 7930 12.7 9.6 132 21.5 12.2 176
Grand Targhee 9260 49.7 41.9 119 44.4 32.4 137
Granite Creek 6770 23.5 11.1 212 36.6 20.2 181
Grassy Lake 7265 37.8 31.5 120 57.1 37.2 153
Gros Ventre Summit 8750 20.6 13.2 156 25.0 13.6 184
Gunsight Pass 9820 23.7 13.6 174 25.9 14.8 175
Lewis Lake Divide 7850 46.6 30.3 154 57.2 36.6 156
Phillips Bench 8200 38.5 25.7 150 47.7 29.0 164
Salt River Summit 7760 18.1 10.0 181 29.9 17.3 173
Snake River Station 6920 15.8 11.5 137 37.2 23.4 159
Spring Creek Divide 9000 42.0 23.5 179 41.4 24.6 168
Thumb Divide 7980 21.5 14.5 148 29.0 19.6 148
Togwotee Pass 9580 34.2 23.7 144 39.9 25.5 156
Two Ocean Plateau 9240 -M 27.9 * -M 28.4 *
Willow Creek 8380 27.9 26.8 104 52.1 35.1 148
Younts Peak 8350 25.3 15.1 168 32.0 16.6 193
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Basin Index (%) 147 160
MADISON-GALLATIN
Black Bear 8170 48.2 36.8 131 56.1 39.6 142
Canyon 7870 17.8 12.3 145 26.4 16.9 156
Madison Plateau 7750 28.2 22.9 123 37.8 27.4 138
West Yellowstone 6700 3.0 7.8 38 24.1 15.0 161
Whiskey Creek 6800 13.1 15.2 86 27.7 21.1 131
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Basin Index (%) 116 143
YELLOWSTONE
Beartooth Lake 9360 33.7 23.2 145 28.8 20.6 140
Burnt Mtn 5880 .1 .0 * 15.0 14.1 106
Canyon 7870 17.8 12.3 145 26.4 16.9 156
Cole Creek 7850 11.9 16.1 74 9.5 14.4 66
Evening Star 9200 39.2 24.9 157 46.1 28.6 161
Fisher Creek 9100 44.6 32.3 138 48.8 33.2 147
Northeast Entrance 7350 4.5 7.0 64 21.1 12.9 164
Parker Peak 9400 37.8 20.8 182 35.8 18.6 192
Sylvan Lake 8420 24.8 20.4 122 38.8 23.4 166
Thumb Divide 7980 21.5 14.5 148 29.0 19.6 148
Two Ocean Plateau 9240 -M 27.9 * -M 28.4 *
White Mill 8700 37.9 23.6 161 37.1 24.8 150
Wolverine 7650 3.5 7.5 47 21.5 12.8 168
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Basin Index (%) 137 149
WIND RIVER
Burroughs Creek 8750 21.4 -M * 28.1 -M *
Castle Creek 8400 8.4 -M * 16.1 -M *
Cold Springs 9630 15.9 4.9 324 20.5 10.8 190
Deer Park 9700 33.2 16.2 205 39.2 21.3 184
Hobbs Park 10100 30.3 14.8 205 29.4 14.7 200
Kirwin 9550 23.0 10.0 230 26.0 12.3 211
Little Warm 9370 18.8 10.2 184 25.5 13.8 185
Owl Creek 8975 8.7 4.2 207 13.5 6.7 201
South Pass 9040 31.7 15.6 203 29.3 18.5 158
St. Lawrence Alt 8620 8.0 5.4 148 17.9 9.8 183
Togwotee Pass 9580 34.2 23.7 144 39.9 25.5 156
Townsend Creek 8700 17.6 9.6 183 23.9 13.1 182
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Basin Index (%) 193 181
BIGHORN BASIN
Bald Mtn. 9380 20.7 19.7 105 18.1 18.1 100
Bear Trap Meadow 8200 3.6 3.5 103 9.7 9.3 104
Bone Springs Div 9350 20.8 16.2 128 19.0 16.6 114
Grave Springs 8550 7.0 9.6 73 8.8 11.5 77
Kirwin 9550 23.0 10.0 230 26.0 12.3 211
Marquette 8760 14.3 -M * 18.2 -M *
Middle Powder 7760 8.6 12.5 69 8.6 12.7 68
Owl Creek 8975 8.7 4.2 207 13.5 6.7 201
Powder River Pass 9480 8.9 10.2 87 14.6 13.6 107
Shell Creek 9580 18.5 15.3 121 16.1 14.8 109
Timber Creek 7950 6.7 4.9 137 11.9 8.4 142
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Basin Index (%) 119 118
SHOSHONE RIVER
Blackwater 9780 39.2 23.8 165 43.5 21.7 200
Evening Star 9200 39.2 24.9 157 46.1 28.6 161
Marquette 8760 14.3 -M * 18.2 -M *
Sylvan Road 7120 1.4 10.0 14 31.3 17.5 179
Younts Peak 8350 25.3 15.1 168 32.0 16.6 193
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Basin Index (%) 142 181
POWDER RIVER
Bear Trap Meadow 8200 3.6 3.5 103 9.7 9.3 104
Cloud Peak Reservoir 9860 16.7 15.7 106 20.4 14.7 139
Grave Springs 8550 7.0 9.6 73 8.8 11.5 77
Hansen Sawmill 8360 11.1 5.0 222 15.7 9.5 165
Middle Powder 7760 8.6 12.5 69 8.6 12.7 68
Powder River Pass 9480 8.9 10.2 87 14.6 13.6 107
Soldier Park 8720 14.5 -M * 15.8 -M *
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Basin Index (%) 99 109
TONGUE RIVER
Big Goose 7990 11.8 9.4 126 15.3 12.5 122
Bone Springs Div 9350 20.8 16.2 128 19.0 16.6 114
Burgess Junction 7880 10.9 12.4 88 13.0 13.4 97
Dome Lake 8880 16.6 11.8 141 17.8 14.8 120
Little Goose 8870 14.3 -M * 18.8 -M *
Sucker Creek 8880 13.2 12.7 104 15.2 15.6 97
Tie Creek 6870 .2 4.5 4 14.5 12.7 114
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Basin Index (%) 110 111
BELLE FOURCHE
Cole Canyon 5910 .0 2.2 0 8.0 10.3 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .1 4.2 2 9.9 12.8 77
North Rapid Creek 6130 .0 4.4 0 8.3 10.6 78
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Basin Index (%) 1 78
UPPER N. PLATTE
Arapaho Ridge 10960 23.4 21.4 109 26.4 24.3 109
Blackhall Mtn 9820 34.2 -M * 38.2 -M *
Columbine 9160 11.6 20.7 56 27.9 26.8 104
Divide Peak 8880 11.2 19.1 59 23.4 22.7 103
Joe Wright 10120 15.5 22.2 70 28.8 27.6 104
Laprele Creek 8375 6.4 8.3 77 12.8 13.5 95
Med Bow 10500 34.8 -M * 35.7 -M *
North French Creek 10130 23.2 32.0 72 28.0 28.3 99
Never Summer 10280 21.9 20.6 106 19.6 -M *
Old Battle 10000 36.2 32.5 111 38.9 36.8 106
Rawah 9020 4.1 8.6 48 17.5 15.5 113
Sage Creek Basin 7850 -M 6.6 * 16.9 15.2 111
Sand Lake 10050 29.9 30.4 98 28.1 26.6 106
South Brush Creek 8440 -M 9.9 * 13.2 16.3 81
Tower 10500 37.3 47.8 78 44.3 41.8 106
Webber Springs 9250 22.4 22.3 100 33.8 28.2 120
Willow Creek Pass 9540 17.7 12.9 137 18.6 14.3 130
Zirkel 9340 24.1 22.8 106 42.5 29.7 143
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Basin Index (%) 89 109
SWEETWATER
Deer Park 9700 33.2 16.2 205 39.2 21.3 184
Larsen Creek 9000 13.2 10.4 127 24.1 -M *
South Pass 9040 31.7 15.6 203 29.3 18.5 158
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Basin Index (%) 185 172
LOWER N. PLATTE
Casper Mtn. 7900 9.6 14.5 66 13.8 16.4 84
Laprele Creek 8375 6.4 8.3 77 12.8 13.5 95
Reno Hill 8400 11.7 14.0 84 15.4 16.9 91
Windy Peak 7900 4.3 6.7 64 12.0 11.5 104
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Basin Index (%) 74 93
LARAMIE RIVER
Brooklyn Lake 10240 20.0 22.1 90 23.6 22.6 104
Cinnabar Park 9574 12.8 20.3 63 22.6 25.3 89
Crow Creek 8330 .0 1.1 0 9.3 12.0 78
Deadman Hill 10220 19.7 16.8 117 20.8 18.7 111
Rawah 9020 4.1 8.6 48 17.5 15.5 113
Roach 9700 14.5 16.5 88 21.6 20.4 106
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Basin Index (%) 83 101
S. PLATTE
Black Mountain 8920 8.0 -M * 13.3 -M *
Crow Creek 8330 .0 1.1 0 9.3 12.0 78
Deadman Hill 10220 19.7 16.8 117 20.8 18.7 111
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Basin Index (%) 110 98
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 4.9 0 17.1 16.0 107
Divide Peak 8880 11.2 19.1 59 23.4 22.7 103
Elk River 8700 5.6 15.8 35 20.4 21.1 97
Little Snake River 8915 20.9 24.7 85 39.3 31.2 126
Old Battle 10000 36.2 32.5 111 38.9 36.8 106
Sage Creek Basin 7850 -M 6.6 * 16.9 15.2 111
Sandstone RS 8150 -M 10.4 * 16.3 19.4 84
Whiskey Park 8950 21.2 26.0 82 30.7 29.5 104
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Basin Index (%) 77 106
UPPER GREEN RIVER
Big Sandy Opening 9080 21.7 12.7 171 24.2 14.0 173
Blind Bull Sum 8650 44.3 24.0 185 -M 20.1 *
East Rim Divide 7930 12.7 9.6 132 21.5 12.2 176
Elkhart Park G.S. 9400 20.0 11.9 168 25.1 14.0 179
Gros Ventre Summit 8750 20.6 13.2 156 25.0 13.6 184
Gunsight Pass 9820 23.7 13.6 174 25.9 14.8 175
Kendall R.S. 7740 16.6 8.8 189 29.6 14.7 201
Loomis Park 8240 25.2 13.1 192 32.8 17.9 183
New Fork Lake 8340 13.3 9.0 148 18.5 11.2 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.5 10.9 151 28.1 14.7 191
Spring Creek Divide 9000 42.0 23.5 179 41.4 24.6 168
Triple Peak 8500 35.5 19.3 184 42.0 26.2 160
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Basin Index (%) 172 177
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.0 -M * 16.7 -M *
Buck Pasture 9632 15.4 -M * 24.4 -M *
EF Blacks Fork GS 9360 11.6 -M * 18.4 -M *
Hams Fork 7840 10.9 7.1 154 22.5 11.9 189
Hewinta 9500 6.4 8.3 77 18.4 14.9 123
Hickerson Park 9122 6.1 5.6 109 13.6 11.0 124
Hole-in-Rock 9168 5.5 6.0 92 14.3 10.5 136
Indian Creek 9425 40.8 23.2 176 42.3 23.5 180
Kelley R.S. 8180 24.6 12.9 191 31.6 18.8 168
Spirit Lk 10235 15.5 -M * 19.5 -M *
Steel Creek Park 10158 19.7 16.2 122 22.2 17.6 126
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Basin Index (%) 144 152
UPPER BEAR RIVER
Bear River RS 8777 3.1 -M * 19.5 -M *
Bug Lake 7987 32.1 17.6 182 35.5 20.2 176
Burts Miller Ranch 8000 .5 -M * 10.9 -M *
Chalk Creek #1 9171 32.1 24.7 130 37.6 26.6 141
Hayden Fork 9130 13.5 12.2 111 30.9 22.3 139
Kelley R.S. 8180 24.6 12.9 191 31.6 18.8 168
Lily Lake 9133 11.5 11.0 105 21.0 18.2 115
Monte Cristo 8932 36.2 27.6 131 41.1 27.2 151
Salt River Summit 7760 18.1 10.0 181 29.9 17.3 173
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Basin Index (%) 145 151
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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.