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 13 , 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 24.0 14.0 171 40.1 21.2 189
Black Bear 8170 45.6 36.6 125 54.5 38.7 141
Blind Bull Sum 8650 44.3 23.7 187 -M 19.7 *
Cottonwood Creek 7670 -M 20.3 * -M 25.0 *
East Rim Divide 7930 15.2 10.1 150 21.3 11.9 179
Grand Targhee 9260 -M 40.4 * -M 31.4 *
Granite Creek 6770 25.0 13.0 192 36.3 19.8 183
Grassy Lake 7265 37.6 31.4 120 55.6 36.4 153
Gros Ventre Summit 8750 -M 12.9 * -M 13.2 *
Gunsight Pass 9820 23.9 13.6 176 25.8 14.1 183
Lewis Lake Divide 7850 46.9 30.2 155 56.1 35.8 157
Phillips Bench 8200 -M 26.0 * -M 28.4 *
Salt River Summit 7760 19.9 11.8 169 -M 16.9 *
Snake River Station 6920 17.7 13.6 130 36.1 22.7 159
Spring Creek Divide 9000 41.9 23.0 182 41.2 24.1 171
Thumb Divide 7980 22.2 14.6 152 28.3 18.9 150
Togwotee Pass 9580 34.2 22.8 150 39.3 24.7 159
Two Ocean Plateau 9240 -M 26.9 * -M 27.6 *
Willow Creek 8380 -M 27.2 * -M 34.2 *
Younts Peak 8350 26.1 14.6 179 31.7 16.0 198
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Basin Index (%) 155 164
MADISON-GALLATIN
Black Bear 8170 45.6 36.6 125 54.5 38.7 141
Canyon 7870 18.0 12.3 146 26.1 16.5 158
Madison Plateau 7750 27.8 22.3 125 36.7 26.6 138
West Yellowstone 6700 5.7 8.5 67 23.5 14.3 164
Whiskey Creek 6800 13.3 14.6 91 27.3 20.5 133
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Basin Index (%) 117 144
YELLOWSTONE
Beartooth Lake 9360 33.4 22.0 152 28.5 20.1 142
Burnt Mtn 5880 .0 1.7 0 15.0 13.3 113
Canyon 7870 18.0 12.3 146 26.1 16.5 158
Cole Creek 7850 12.5 15.4 81 9.6 13.7 70
Evening Star 9200 39.0 24.4 160 45.5 27.8 164
Fisher Creek 9100 44.1 31.7 139 48.1 32.2 149
Northeast Entrance 7350 7.4 8.4 88 20.9 12.5 167
Parker Peak 9400 36.6 20.2 181 35.2 18.0 196
Sylvan Lake 8420 24.8 19.8 125 37.9 22.7 167
Thumb Divide 7980 22.2 14.6 152 28.3 18.9 150
Two Ocean Plateau 9240 -M 26.9 * -M 27.6 *
White Mill 8700 37.4 23.3 161 36.7 24.1 152
Wolverine 7650 4.5 9.1 49 21.5 12.4 173
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Basin Index (%) 138 152
WIND RIVER
Burroughs Creek 8750 23.0 -M * 28.0 -M *
Castle Creek 8400 10.6 -M * 15.9 -M *
Cold Springs 9630 17.6 6.0 293 20.4 10.3 198
Deer Park 9700 33.5 16.2 207 38.6 20.5 188
Hobbs Park 10100 30.5 14.9 205 29.1 14.1 206
Kirwin 9550 22.7 9.9 229 25.9 11.9 218
Little Warm 9370 19.2 10.3 186 25.4 13.2 192
Owl Creek 8975 10.5 5.4 194 13.5 6.3 214
South Pass 9040 31.9 15.8 202 29.0 17.9 162
St. Lawrence Alt 8620 10.0 6.7 149 17.5 9.3 188
Togwotee Pass 9580 34.2 22.8 150 39.3 24.7 159
Townsend Creek 8700 18.6 10.0 186 23.7 12.7 187
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Basin Index (%) 194 186
BIGHORN BASIN
Bald Mtn. 9380 20.8 19.3 108 18.1 17.5 103
Bear Trap Meadow 8200 5.6 4.6 122 9.7 8.9 109
Bone Springs Div 9350 21.0 17.0 124 18.9 16.0 118
Grave Springs 8550 7.7 9.6 80 8.8 11.0 80
Kirwin 9550 22.7 9.9 229 25.9 11.9 218
Marquette 8760 14.7 -M * 18.2 -M *
Middle Powder 7760 8.9 12.4 72 8.6 12.2 70
Owl Creek 8975 10.5 5.4 194 13.5 6.3 214
Powder River Pass 9480 9.8 10.3 95 14.4 13.0 111
Shell Creek 9580 18.9 15.6 121 15.8 14.2 111
Timber Creek 7950 8.0 5.2 154 11.9 7.7 155
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Basin Index (%) 123 123
SHOSHONE RIVER
Blackwater 9780 38.7 23.5 165 42.8 21.0 204
Evening Star 9200 39.0 24.4 160 45.5 27.8 164
Marquette 8760 14.7 -M * 18.2 -M *
Sylvan Road 7120 5.1 10.4 49 31.0 16.9 183
Younts Peak 8350 26.1 14.6 179 31.7 16.0 198
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Basin Index (%) 149 185
POWDER RIVER
Bear Trap Meadow 8200 5.6 4.6 122 9.7 8.9 109
Cloud Peak Reservoir 9860 18.4 15.3 120 20.3 14.0 145
Grave Springs 8550 7.7 9.6 80 8.8 11.0 80
Hansen Sawmill 8360 12.5 6.1 205 15.7 9.0 174
Middle Powder 7760 8.9 12.4 72 8.6 12.2 70
Powder River Pass 9480 9.8 10.3 95 14.4 13.0 111
Soldier Park 8720 16.3 -M * 15.8 -M *
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Basin Index (%) 108 114
TONGUE RIVER
Big Goose 7990 12.6 9.9 127 15.2 12.0 127
Bone Springs Div 9350 21.0 17.0 124 18.9 16.0 118
Burgess Junction 7880 11.5 12.2 94 12.9 12.9 100
Dome Lake 8880 17.2 12.0 143 17.7 14.2 125
Little Goose 8870 15.1 -M * 18.8 -M *
Sucker Creek 8880 14.2 12.6 113 15.1 15.0 101
Tie Creek 6870 3.4 5.1 67 14.5 12.1 120
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Basin Index (%) 116 115
BELLE FOURCHE
Cole Canyon 5910 .0 3.8 0 7.8 9.9 79
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Basin Index (%) 0 79
CHEYENNE RIVER BASIN
Blind Park 6890 .0 5.8 0 9.7 12.4 78
North Rapid Creek 6130 .0 5.9 0 8.2 10.3 80
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Basin Index (%) 0 79
UPPER N. PLATTE
Arapaho Ridge 10960 25.2 21.5 117 26.4 23.6 112
Blackhall Mtn 9820 36.4 -M * 38.1 -M *
Columbine 9160 16.2 22.6 72 27.6 26.2 105
Divide Peak 8880 15.7 20.3 77 23.3 22.0 106
Joe Wright 10120 18.3 22.0 83 28.8 26.7 108
Laprele Creek 8375 9.6 9.3 103 12.7 13.0 98
Med Bow 10500 38.4 -M * 35.7 -M *
North French Creek 10130 25.1 31.2 80 27.9 27.5 101
Never Summer 10280 21.7 20.5 106 19.6 -M *
Old Battle 10000 36.7 32.1 114 38.9 35.8 109
Rawah 9020 7.6 10.0 76 17.5 15.0 117
Sage Creek Basin 7850 3.8 9.9 38 16.9 15.0 113
Sand Lake 10050 31.1 30.1 103 28.2 25.6 110
South Brush Creek 8440 -M 11.3 * 13.0 15.8 82
Tower 10500 39.3 47.2 83 44.2 40.8 108
Webber Springs 9250 25.9 23.4 111 33.8 27.4 123
Willow Creek Pass 9540 18.1 12.6 144 18.7 13.9 135
Zirkel 9340 31.1 24.7 126 42.5 29.1 146
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Basin Index (%) 96 112
SWEETWATER
Deer Park 9700 33.5 16.2 207 38.6 20.5 188
Larsen Creek 9000 16.0 11.0 145 23.6 -M *
South Pass 9040 31.9 15.8 202 29.0 17.9 162
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Basin Index (%) 189 176
LOWER N. PLATTE
Casper Mtn. 7900 11.6 14.5 80 13.6 15.7 87
Laprele Creek 8375 9.6 9.3 103 12.7 13.0 98
Reno Hill 8400 13.0 14.2 92 15.4 16.2 95
Windy Peak 7900 7.3 7.5 97 11.9 11.0 108
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Basin Index (%) 91 96
LARAMIE RIVER
Brooklyn Lake 10240 22.8 22.3 102 23.5 21.8 108
Cinnabar Park 9574 16.5 21.3 77 22.6 24.8 91
Crow Creek 8330 .0 5.5 0 9.3 11.4 82
Deadman Hill 10220 21.5 16.6 130 20.9 18.0 116
Rawah 9020 7.6 10.0 76 17.5 15.0 117
Roach 9700 16.5 16.5 100 21.6 19.9 109
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Basin Index (%) 92 104
S. PLATTE
Black Mountain 8920 10.3 -M * 13.3 -M *
Crow Creek 8330 .0 5.5 0 9.3 11.4 82
Deadman Hill 10220 21.5 16.6 130 20.9 18.0 116
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Basin Index (%) 97 103
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 7.7 * 16.9 15.4 110
Divide Peak 8880 15.7 20.3 77 23.3 22.0 106
Elk River 8700 11.7 17.8 66 20.6 20.6 100
Little Snake River 8915 25.8 26.0 99 39.2 30.7 128
Old Battle 10000 36.7 32.1 114 38.9 35.8 109
Sage Creek Basin 7850 3.8 9.9 38 16.9 15.0 113
Sandstone RS 8150 4.4 12.4 35 16.4 18.8 87
Whiskey Park 8950 25.0 27.5 91 30.6 28.5 107
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Basin Index (%) 84 109
UPPER GREEN RIVER
Big Sandy Opening 9080 21.3 12.9 165 23.6 13.6 174
Blind Bull Sum 8650 44.3 23.7 187 -M 19.7 *
East Rim Divide 7930 15.2 10.1 150 21.3 11.9 179
Elkhart Park G.S. 9400 20.1 12.2 165 24.7 13.6 182
Gros Ventre Summit 8750 -M 12.9 * -M 13.2 *
Gunsight Pass 9820 23.9 13.6 176 25.8 14.1 183
Kendall R.S. 7740 19.3 10.4 186 29.5 14.3 206
Loomis Park 8240 26.6 13.7 194 32.7 17.5 187
New Fork Lake 8340 15.3 9.8 156 18.2 10.9 167
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.2 12.0 152 27.9 14.4 194
Spring Creek Divide 9000 41.9 23.0 182 41.2 24.1 171
Triple Peak 8500 36.3 20.3 179 41.6 25.6 162
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Basin Index (%) 175 179
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 17.9 -M * 24.0 -M *
EF Blacks Fork GS 9360 14.5 -M * 17.9 -M *
Hams Fork 7840 13.5 9.2 147 22.0 11.6 190
Hewinta 9500 9.1 10.3 88 18.0 14.5 124
Hickerson Park 9122 8.6 7.2 119 13.5 10.6 127
Hole-in-Rock 9168 7.3 7.1 103 14.2 10.1 141
Indian Creek 9425 41.2 24.3 170 41.8 22.9 183
Kelley R.S. 8180 26.1 14.0 186 31.2 18.3 170
Spirit Lk 10235 16.4 -M * 19.2 -M *
Steel Creek Park 10158 19.6 16.1 122 21.7 17.1 127
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Basin Index (%) 142 155
UPPER BEAR RIVER
Bear River RS 8777 7.7 -M * 19.0 -M *
Bug Lake 7987 33.1 19.2 172 34.8 19.8 176
Burts Miller Ranch 8000 1.2 -M * 10.7 -M *
Chalk Creek #1 9171 34.4 24.8 139 37.1 25.9 143
Hayden Fork 9130 18.6 14.4 129 30.4 21.6 141
Kelley R.S. 8180 26.1 14.0 186 31.2 18.3 170
Lily Lake 9133 13.4 12.7 106 20.5 17.7 116
Monte Cristo 8932 37.8 27.8 136 40.5 26.5 153
Salt River Summit 7760 19.9 11.8 169 -M 16.9 *
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Basin Index (%) 147 150
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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.