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 SATURDAY: APRIL 15 , 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 22.9 13.2 173 40.1 21.3 188
Black Bear 8170 46.9 36.6 128 55.5 39.0 142
Blind Bull Sum 8650 43.8 23.8 184 -M 19.8 *
Cottonwood Creek 7670 27.5 19.8 139 39.2 25.2 156
East Rim Divide 7930 13.9 10.0 139 21.2 11.9 178
Grand Targhee 9260 48.0 41.0 117 43.2 32.0 135
Granite Creek 6770 23.9 12.3 194 36.4 19.9 183
Grassy Lake 7265 37.1 31.5 118 56.1 36.6 153
Gros Ventre Summit 8750 -M 13.0 * -M 13.3 *
Gunsight Pass 9820 23.8 13.4 178 25.7 14.3 180
Lewis Lake Divide 7850 45.3 30.2 150 56.3 36.1 156
Phillips Bench 8200 37.8 26.0 145 47.3 28.6 165
Salt River Summit 7760 19.1 11.2 171 29.5 17.0 174
Snake River Station 6920 16.3 12.8 127 36.3 22.9 159
Spring Creek Divide 9000 41.8 23.2 180 41.2 24.3 170
Thumb Divide 7980 21.5 14.4 149 28.4 19.0 149
Togwotee Pass 9580 33.9 23.0 147 39.4 24.9 158
Two Ocean Plateau 9240 -M 27.2 * -M 27.9 *
Willow Creek 8380 28.2 26.7 106 51.1 34.4 149
Younts Peak 8350 25.7 14.7 175 31.6 16.2 195
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Basin Index (%) 145 160
MADISON-GALLATIN
Black Bear 8170 46.9 36.6 128 55.5 39.0 142
Canyon 7870 17.8 12.4 144 26.2 16.6 158
Madison Plateau 7750 28.1 22.5 125 37.3 26.8 139
West Yellowstone 6700 4.7 8.2 57 23.9 14.4 166
Whiskey Creek 6800 13.2 14.8 89 27.5 20.6 133
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Basin Index (%) 117 145
YELLOWSTONE
Beartooth Lake 9360 33.2 22.4 148 28.7 20.3 141
Burnt Mtn 5880 .1 .2 50* 15.0 13.5 111
Canyon 7870 17.8 12.4 144 26.2 16.6 158
Cole Creek 7850 12.2 15.6 78 9.5 14.0 68
Evening Star 9200 38.7 24.7 157 45.6 28.1 162
Fisher Creek 9100 44.1 31.9 138 48.4 32.6 148
Northeast Entrance 7350 6.0 8.0 75 20.9 12.6 166
Parker Peak 9400 37.1 20.5 181 35.2 18.2 193
Sylvan Lake 8420 24.4 20.0 122 38.1 22.9 166
Thumb Divide 7980 21.5 14.4 149 28.4 19.0 149
Two Ocean Plateau 9240 -M 27.2 * -M 27.9 *
White Mill 8700 37.2 23.5 158 36.9 24.4 151
Wolverine 7650 3.9 8.6 45 21.2 12.6 168
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Basin Index (%) 137 151
WIND RIVER
Burroughs Creek 8750 22.1 -M * 28.0 -M *
Castle Creek 8400 9.6 -M * 15.8 -M *
Cold Springs 9630 16.5 5.8 284 20.3 10.4 195
Deer Park 9700 33.0 16.0 206 38.6 20.7 186
Hobbs Park 10100 30.1 14.9 202 29.1 14.2 205
Kirwin 9550 22.0 9.9 222 26.0 12.0 217
Little Warm 9370 19.0 10.2 186 25.4 13.4 190
Owl Creek 8975 9.7 5.1 190 13.3 6.4 208
South Pass 9040 32.0 15.8 203 29.1 18.0 162
St. Lawrence Alt 8620 9.1 6.4 142 17.5 9.4 186
Togwotee Pass 9580 33.9 23.0 147 39.4 24.9 158
Townsend Creek 8700 18.0 10.0 180 23.7 12.8 185
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Basin Index (%) 191 185
BIGHORN BASIN
Bald Mtn. 9380 20.8 19.4 107 18.0 17.7 102
Bear Trap Meadow 8200 4.8 4.4 109 9.6 9.1 105
Bone Springs Div 9350 20.8 16.8 124 18.8 16.2 116
Grave Springs 8550 7.2 9.6 75 8.7 11.2 78
Kirwin 9550 22.0 9.9 222 26.0 12.0 217
Marquette 8760 14.2 -M * 18.0 -M *
Middle Powder 7760 8.6 12.4 69 8.6 12.3 70
Owl Creek 8975 9.7 5.1 190 13.3 6.4 208
Powder River Pass 9480 9.4 10.2 92 14.5 13.2 110
Shell Creek 9580 18.6 15.5 120 15.9 14.3 111
Timber Creek 7950 7.5 5.2 144 11.9 7.9 151
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Basin Index (%) 119 121
SHOSHONE RIVER
Blackwater 9780 38.7 23.7 163 42.9 21.3 201
Evening Star 9200 38.7 24.7 157 45.6 28.1 162
Marquette 8760 14.2 -M * 18.0 -M *
Sylvan Road 7120 3.4 10.3 33 31.1 17.1 182
Younts Peak 8350 25.7 14.7 175 31.6 16.2 195
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Basin Index (%) 145 183
POWDER RIVER
Bear Trap Meadow 8200 4.8 4.4 109 9.6 9.1 105
Cloud Peak Reservoir 9860 16.4 15.4 106 20.3 14.2 143
Grave Springs 8550 7.2 9.6 75 8.7 11.2 78
Hansen Sawmill 8360 11.7 5.9 198 15.6 9.1 171
Middle Powder 7760 8.6 12.4 69 8.6 12.3 70
Powder River Pass 9480 9.4 10.2 92 14.5 13.2 110
Soldier Park 8720 15.2 -M * 15.7 -M *
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Basin Index (%) 100 112
TONGUE RIVER
Big Goose 7990 12.1 9.7 125 15.2 12.1 126
Bone Springs Div 9350 20.8 16.8 124 18.8 16.2 116
Burgess Junction 7880 11.1 12.1 92 12.9 13.0 99
Dome Lake 8880 16.9 12.0 141 17.7 14.3 124
Little Goose 8870 14.7 -M * 18.7 -M *
Sucker Creek 8880 13.7 12.6 109 15.0 15.1 99
Tie Creek 6870 2.0 4.8 42 14.5 12.3 118
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Basin Index (%) 113 113
BELLE FOURCHE
Cole Canyon 5910 .0 3.2 0 7.8 10.0 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 5.1 0 9.7 12.4 78
North Rapid Creek 6130 .0 5.5 0 8.1 10.4 78
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Basin Index (%) 0 78
UPPER N. PLATTE
Arapaho Ridge 10960 24.9 21.6 115 26.4 23.7 111
Blackhall Mtn 9820 35.7 -M * 38.1 -M *
Columbine 9160 14.3 21.8 66 27.7 26.4 105
Divide Peak 8880 14.8 20.0 74 23.2 22.2 105
Joe Wright 10120 17.2 22.1 78 28.8 26.9 107
Laprele Creek 8375 8.2 9.0 91 12.7 13.2 96
Med Bow 10500 35.8 -M * 35.7 -M *
North French Creek 10130 24.8 31.8 78 27.9 27.8 100
Never Summer 10280 21.8 20.5 106 19.6 -M *
Old Battle 10000 36.6 32.2 114 38.9 36.1 108
Rawah 9020 6.4 9.6 67 17.4 15.0 116
Sage Creek Basin 7850 1.5 8.8 17 16.9 15.0 113
Sand Lake 10050 30.8 30.4 101 28.2 25.9 109
South Brush Creek 8440 -M 10.9 * 13.0 15.9 82
Tower 10500 38.2 47.4 81 44.2 41.1 108
Webber Springs 9250 25.9 23.3 111 33.8 27.7 122
Willow Creek Pass 9540 18.0 12.7 142 18.6 14.0 133
Zirkel 9340 28.2 23.9 118 42.4 29.2 145
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Basin Index (%) 93 111
SWEETWATER
Deer Park 9700 33.0 16.0 206 38.6 20.7 186
Larsen Creek 9000 14.5 10.8 134 23.5 -M *
South Pass 9040 32.0 15.8 203 29.1 18.0 162
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Basin Index (%) 187 175
LOWER N. PLATTE
Casper Mtn. 7900 10.7 14.4 74 13.6 16.0 85
Laprele Creek 8375 8.2 9.0 91 12.7 13.2 96
Reno Hill 8400 12.3 14.1 87 15.3 16.5 93
Windy Peak 7900 6.1 7.4 82 11.9 11.2 106
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Basin Index (%) 83 94
LARAMIE RIVER
Brooklyn Lake 10240 21.8 22.2 98 23.6 22.1 107
Cinnabar Park 9574 14.9 21.0 71 22.6 24.9 91
Crow Creek 8330 .0 4.1 0 9.3 11.5 81
Deadman Hill 10220 21.3 16.5 129 20.9 18.2 115
Rawah 9020 6.4 9.6 67 17.4 15.0 116
Roach 9700 15.8 16.5 96 21.6 20.0 108
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Basin Index (%) 89 103
S. PLATTE
Black Mountain 8920 9.4 -M * 13.3 -M *
Crow Creek 8330 .0 4.1 0 9.3 11.5 81
Deadman Hill 10220 21.3 16.5 129 20.9 18.2 115
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Basin Index (%) 103 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 6.7 0 17.0 15.6 109
Divide Peak 8880 14.8 20.0 74 23.2 22.2 105
Elk River 8700 10.3 17.2 60 20.5 20.7 99
Little Snake River 8915 24.4 25.8 95 39.1 30.7 127
Old Battle 10000 36.6 32.2 114 38.9 36.1 108
Sage Creek Basin 7850 1.5 8.8 17 16.9 15.0 113
Sandstone RS 8150 2.2 11.8 19 16.3 19.0 86
Whiskey Park 8950 23.8 27.0 88 30.5 28.8 106
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Basin Index (%) 76 108
UPPER GREEN RIVER
Big Sandy Opening 9080 20.8 12.9 161 23.5 13.7 172
Blind Bull Sum 8650 43.8 23.8 184 -M 19.8 *
East Rim Divide 7930 13.9 10.0 139 21.2 11.9 178
Elkhart Park G.S. 9400 19.6 12.0 163 24.7 13.7 180
Gros Ventre Summit 8750 -M 13.0 * -M 13.3 *
Gunsight Pass 9820 23.8 13.4 178 25.7 14.3 180
Kendall R.S. 7740 17.8 9.8 182 29.4 14.4 204
Loomis Park 8240 25.6 13.6 188 32.7 17.6 186
New Fork Lake 8340 14.2 9.6 148 18.3 11.0 166
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 17.4 11.6 150 27.9 14.5 192
Spring Creek Divide 9000 41.8 23.2 180 41.2 24.3 170
Triple Peak 8500 35.5 19.7 180 41.6 25.7 162
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Basin Index (%) 172 178
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.2 -M * 16.5 -M *
Buck Pasture 9632 17.0 -M * 24.1 -M *
EF Blacks Fork GS 9360 13.1 -M * 18.0 -M *
Hams Fork 7840 12.5 8.6 145 21.9 11.7 187
Hewinta 9500 8.1 9.7 84 17.9 14.5 123
Hickerson Park 9122 7.5 6.6 114 13.4 10.7 125
Hole-in-Rock 9168 6.2 6.8 91 13.9 10.2 136
Indian Creek 9425 40.1 23.9 168 41.7 23.1 181
Kelley R.S. 8180 24.9 13.7 182 31.2 18.5 169
Spirit Lk 10235 15.8 -M * 19.1 -M *
Steel Creek Park 10158 19.3 16.1 120 21.7 17.2 126
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Basin Index (%) 139 153
UPPER BEAR RIVER
Bear River RS 8777 6.4 -M * 19.0 -M *
Bug Lake 7987 32.0 19.0 168 34.7 19.9 174
Burts Miller Ranch 8000 .0 -M * 10.6 -M *
Chalk Creek #1 9171 33.3 24.9 134 37.1 26.1 142
Hayden Fork 9130 17.1 13.9 123 30.3 21.8 139
Kelley R.S. 8180 24.9 13.7 182 31.2 18.5 169
Lily Lake 9133 12.3 12.4 99 20.4 17.8 115
Monte Cristo 8932 36.4 27.8 131 40.5 26.8 151
Salt River Summit 7760 19.1 11.2 171 29.5 17.0 174
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Basin Index (%) 142 151
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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.