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 TUESDAY: APRIL 11 , 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 24.6 14.7 167 40.0 21.0 190
Black Bear 8170 47.2 36.7 129 54.3 38.4 141
Blind Bull Sum 8650 43.8 23.5 186 -M 19.6 *
Cottonwood Creek 7670 28.6 20.7 138 39.1 24.8 158
East Rim Divide 7930 15.7 10.2 154 21.3 11.8 181
Grand Targhee 9260 47.3 39.6 119 39.7 31.2 127
Granite Creek 6770 25.9 13.6 190 36.2 19.7 184
Grassy Lake 7265 37.5 31.4 119 55.5 36.1 154
Gros Ventre Summit 8750 -M 12.8 * -M 13.1 *
Gunsight Pass 9820 23.9 13.8 173 25.7 14.1 182
Lewis Lake Divide 7850 46.6 30.2 154 55.9 35.6 157
Phillips Bench 8200 38.8 25.8 150 47.2 28.3 167
Salt River Summit 7760 20.1 12.3 163 -M 16.8 *
Snake River Station 6920 18.5 14.2 130 36.2 22.6 160
Spring Creek Divide 9000 41.8 22.7 184 41.1 23.9 172
Thumb Divide 7980 22.7 14.6 155 28.3 18.8 151
Togwotee Pass 9580 34.1 22.6 151 39.2 24.5 160
Two Ocean Plateau 9240 -M 26.6 * -M 27.4 *
Willow Creek 8380 29.2 27.8 105 50.7 33.9 150
Younts Peak 8350 26.2 14.5 181 31.5 15.9 198
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Basin Index (%) 147 160
MADISON-GALLATIN
Black Bear 8170 47.2 36.7 129 54.3 38.4 141
Canyon 7870 18.1 12.3 147 26.0 16.3 160
Madison Plateau 7750 27.7 22.0 126 36.6 26.4 139
West Yellowstone 6700 6.1 8.8 69 23.5 14.2 165
Whiskey Creek 6800 13.3 14.7 90 27.0 20.3 133
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Basin Index (%) 119 145
YELLOWSTONE
Beartooth Lake 9360 33.1 21.7 153 28.1 19.9 141
Burnt Mtn 5880 .0 3.0 0 15.0 13.2 114
Canyon 7870 18.1 12.3 147 26.0 16.3 160
Cole Creek 7850 12.6 15.2 83 9.5 13.3 71
Evening Star 9200 38.6 24.1 160 45.2 27.6 164
Fisher Creek 9100 43.5 31.5 138 47.2 31.8 148
Northeast Entrance 7350 7.8 8.6 91 20.8 12.3 169
Parker Peak 9400 36.1 20.0 180 35.0 17.8 197
Sylvan Lake 8420 24.6 19.7 125 37.9 22.5 168
Thumb Divide 7980 22.7 14.6 155 28.3 18.8 151
Two Ocean Plateau 9240 -M 26.6 * -M 27.4 *
White Mill 8700 36.8 22.9 161 36.2 23.9 151
Wolverine 7650 4.2 9.4 45 21.2 12.3 172
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Basin Index (%) 137 153
WIND RIVER
Burroughs Creek 8750 23.2 -M * 27.7 -M *
Castle Creek 8400 10.9 -M * 15.7 -M *
Cold Springs 9630 17.7 6.3 281 20.3 10.2 199
Deer Park 9700 33.5 16.1 208 38.6 20.4 189
Hobbs Park 10100 30.2 14.6 207 28.7 13.8 208
Kirwin 9550 23.4 9.7 241 25.7 11.7 220
Little Warm 9370 19.4 10.2 190 25.2 13.0 194
Owl Creek 8975 10.7 5.7 188 13.4 6.2 216
South Pass 9040 32.0 15.6 205 28.9 17.7 163
St. Lawrence Alt 8620 10.3 6.9 149 17.4 9.2 189
Togwotee Pass 9580 34.1 22.6 151 39.2 24.5 160
Townsend Creek 8700 18.9 9.9 191 23.6 12.4 190
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Basin Index (%) 196 188
BIGHORN BASIN
Bald Mtn. 9380 20.6 19.3 107 17.6 17.3 102
Bear Trap Meadow 8200 5.8 4.7 123 9.6 8.8 109
Bone Springs Div 9350 20.6 17.0 121 18.4 15.8 116
Grave Springs 8550 7.8 9.5 82 8.7 11.0 79
Kirwin 9550 23.4 9.7 241 25.7 11.7 220
Marquette 8760 14.6 -M * 18.2 -M *
Middle Powder 7760 9.1 12.3 74 8.5 12.0 71
Owl Creek 8975 10.7 5.7 188 13.4 6.2 216
Powder River Pass 9480 9.7 10.3 94 14.0 12.9 109
Shell Creek 9580 18.5 15.5 119 15.5 14.0 111
Timber Creek 7950 8.2 5.1 161 11.9 7.6 157
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Basin Index (%) 123 122
SHOSHONE RIVER
Blackwater 9780 38.4 23.1 166 42.6 20.8 205
Evening Star 9200 38.6 24.1 160 45.2 27.6 164
Marquette 8760 14.6 -M * 18.2 -M *
Sylvan Road 7120 6.2 10.4 60 31.0 16.8 185
Younts Peak 8350 26.2 14.5 181 31.5 15.9 198
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Basin Index (%) 152 185
POWDER RIVER
Bear Trap Meadow 8200 5.8 4.7 123 9.6 8.8 109
Cloud Peak Reservoir 9860 18.0 15.2 118 19.9 13.7 145
Grave Springs 8550 7.8 9.5 82 8.7 11.0 79
Hansen Sawmill 8360 12.2 6.1 200 15.2 8.8 173
Middle Powder 7760 9.1 12.3 74 8.5 12.0 71
Powder River Pass 9480 9.7 10.3 94 14.0 12.9 109
Soldier Park 8720 16.3 -M * 15.5 -M *
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Basin Index (%) 108 113
TONGUE RIVER
Big Goose 7990 12.6 9.9 127 15.1 11.9 127
Bone Springs Div 9350 20.6 17.0 121 18.4 15.8 116
Burgess Junction 7880 11.4 12.2 93 12.8 12.7 101
Dome Lake 8880 17.2 11.9 145 17.6 14.0 126
Little Goose 8870 15.2 -M * 18.6 -M *
Sucker Creek 8880 14.3 12.5 114 14.9 14.8 101
Tie Creek 6870 3.8 5.3 72 14.5 12.1 120
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Basin Index (%) 116 115
BELLE FOURCHE
Cole Canyon 5910 .3 4.3 7 7.6 9.7 78
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Basin Index (%) 7 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 6.4 0 9.6 12.2 79
North Rapid Creek 6130 .1 6.2 2 8.1 10.2 79
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Basin Index (%) 1 79
UPPER N. PLATTE
Arapaho Ridge 10960 25.4 21.3 119 26.4 23.2 114
Blackhall Mtn 9820 36.3 -M * 38.0 -M *
Columbine 9160 17.1 23.0 74 27.3 25.9 105
Divide Peak 8880 15.9 20.3 78 23.2 21.8 106
Joe Wright 10120 18.6 21.8 85 28.7 26.2 110
Laprele Creek 8375 10.8 9.4 115 12.6 12.8 98
Med Bow 10500 39.4 -M * 35.7 -M *
North French Creek 10130 25.4 30.7 83 27.8 27.2 102
Never Summer 10280 21.7 20.5 106 19.5 -M *
Old Battle 10000 36.7 31.9 115 38.7 35.5 109
Rawah 9020 9.1 10.4 88 17.3 14.8 117
Sage Creek Basin 7850 5.8 10.8 54 16.9 14.9 113
Sand Lake 10050 31.0 29.8 104 28.1 25.2 112
South Brush Creek 8440 2.7 11.6 23 12.6 15.6 81
Tower 10500 39.0 46.9 83 44.0 40.3 109
Webber Springs 9250 26.3 23.3 113 33.8 27.1 125
Willow Creek Pass 9540 17.8 12.5 142 18.6 13.7 136
Zirkel 9340 31.0 25.5 122 42.4 29.0 146
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Basin Index (%) 96 113
SWEETWATER
Deer Park 9700 33.5 16.1 208 38.6 20.4 189
Larsen Creek 9000 16.7 11.2 149 23.4 -M *
South Pass 9040 32.0 15.6 205 28.9 17.7 163
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Basin Index (%) 192 177
LOWER N. PLATTE
Casper Mtn. 7900 11.6 14.5 80 13.5 15.4 88
Laprele Creek 8375 10.8 9.4 115 12.6 12.8 98
Reno Hill 8400 13.1 14.2 92 15.1 15.9 95
Windy Peak 7900 8.1 7.6 107 11.8 10.8 109
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Basin Index (%) 95 97
LARAMIE RIVER
Brooklyn Lake 10240 23.0 22.3 103 23.4 21.5 109
Cinnabar Park 9574 17.8 21.4 83 22.6 24.6 92
Crow Creek 8330 .0 6.3 0 9.3 11.3 82
Deadman Hill 10220 21.5 16.5 130 20.9 17.7 118
Rawah 9020 9.1 10.4 88 17.3 14.8 117
Roach 9700 16.9 16.6 102 21.6 19.6 110
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Basin Index (%) 94 105
S. PLATTE
Black Mountain 8920 11.2 -M * 13.3 -M *
Crow Creek 8330 .0 6.3 0 9.3 11.3 82
Deadman Hill 10220 21.5 16.5 130 20.9 17.7 118
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Basin Index (%) 94 104
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 8.4 * 17.0 15.2 112
Divide Peak 8880 15.9 20.3 78 23.2 21.8 106
Elk River 8700 13.0 18.4 71 20.6 20.4 101
Little Snake River 8915 26.2 26.0 101 39.0 30.5 128
Old Battle 10000 36.7 31.9 115 38.7 35.5 109
Sage Creek Basin 7850 5.8 10.8 54 16.9 14.9 113
Sandstone RS 8150 5.8 12.6 46 16.3 18.6 88
Whiskey Park 8950 24.9 27.6 90 30.5 28.3 108
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Basin Index (%) 87 109
UPPER GREEN RIVER
Big Sandy Opening 9080 21.6 12.9 167 23.4 13.5 173
Blind Bull Sum 8650 43.8 23.5 186 -M 19.6 *
East Rim Divide 7930 15.7 10.2 154 21.3 11.8 181
Elkhart Park G.S. 9400 20.0 12.3 163 24.7 13.5 183
Gros Ventre Summit 8750 -M 12.8 * -M 13.1 *
Gunsight Pass 9820 23.9 13.8 173 25.7 14.1 182
Kendall R.S. 7740 19.8 10.9 182 29.5 14.3 206
Loomis Park 8240 27.1 13.7 198 32.5 17.4 187
New Fork Lake 8340 15.7 10.1 155 18.1 10.9 166
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.8 12.2 154 27.8 14.3 194
Spring Creek Divide 9000 41.8 22.7 184 41.1 23.9 172
Triple Peak 8500 36.5 21.0 174 41.4 25.5 162
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Basin Index (%) 174 179
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.6 -M * 16.5 -M *
Buck Pasture 9632 18.1 -M * 24.2 -M *
EF Blacks Fork GS 9360 15.2 -M * 17.8 -M *
Hams Fork 7840 14.6 9.7 151 21.8 11.5 190
Hewinta 9500 9.9 10.6 93 17.9 14.4 124
Hickerson Park 9122 9.0 7.7 117 13.3 10.5 127
Hole-in-Rock 9168 7.9 7.1 111 13.9 10.0 139
Indian Creek 9425 41.5 24.8 167 41.7 22.7 184
Kelley R.S. 8180 25.9 14.3 181 31.2 18.2 171
Spirit Lk 10235 17.3 -M * 19.2 -M *
Steel Creek Park 10158 19.7 16.0 123 21.9 16.9 130
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Basin Index (%) 142 155
UPPER BEAR RIVER
Bear River RS 8777 9.4 -M * 19.1 -M *
Bug Lake 7987 32.9 19.0 173 34.8 19.6 178
Burts Miller Ranch 8000 2.6 -M * 10.5 -M *
Chalk Creek #1 9171 34.2 24.7 138 37.2 25.6 145
Hayden Fork 9130 21.2 14.9 142 30.3 21.4 142
Kelley R.S. 8180 25.9 14.3 181 31.2 18.2 171
Lily Lake 9133 14.0 12.7 110 20.5 17.5 117
Monte Cristo 8932 37.4 27.9 134 40.4 26.3 154
Salt River Summit 7760 20.1 12.3 163 -M 16.8 *
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Basin Index (%) 148 151
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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.