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 FRIDAY: APRIL 14 , 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 23.1 13.5 171 40.1 21.2 189
Black Bear 8170 45.6 36.5 125 54.8 38.8 141
Blind Bull Sum 8650 44.2 23.8 186 -M 19.7 *
Cottonwood Creek 7670 27.4 20.1 136 39.2 25.1 156
East Rim Divide 7930 14.2 10.0 142 21.0 11.9 176
Grand Targhee 9260 47.4 40.7 116 -M 31.7 *
Granite Creek 6770 24.4 12.7 192 36.3 19.8 183
Grassy Lake 7265 37.5 31.4 119 55.7 36.5 153
Gros Ventre Summit 8750 20.4 12.9 158 24.9 13.2 189
Gunsight Pass 9820 23.8 13.5 176 25.7 14.2 181
Lewis Lake Divide 7850 46.0 30.2 152 56.1 35.9 156
Phillips Bench 8200 37.8 26.0 145 47.2 28.5 166
Salt River Summit 7760 19.4 11.5 169 -M 17.0 *
Snake River Station 6920 16.3 13.2 123 36.1 22.8 158
Spring Creek Divide 9000 42.2 23.1 183 41.2 24.2 170
Thumb Divide 7980 21.5 14.5 148 28.3 18.9 150
Togwotee Pass 9580 33.9 22.9 148 39.4 24.8 159
Two Ocean Plateau 9240 -M 27.0 * -M 27.7 *
Willow Creek 8380 28.3 26.9 105 50.7 34.3 148
Younts Peak 8350 26.0 14.7 177 31.8 16.1 198
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Basin Index (%) 146 163
MADISON-GALLATIN
Black Bear 8170 45.6 36.5 125 54.8 38.8 141
Canyon 7870 17.6 12.3 143 26.1 16.5 158
Madison Plateau 7750 27.6 22.4 123 36.7 26.7 137
West Yellowstone 6700 4.6 8.4 55 23.6 14.3 165
Whiskey Creek 6800 13.1 14.7 89 27.4 20.6 133
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Basin Index (%) 115 144
YELLOWSTONE
Beartooth Lake 9360 32.8 22.2 148 28.7 20.2 142
Burnt Mtn 5880 .0 1.0 0 15.0 13.4 112
Canyon 7870 17.6 12.3 143 26.1 16.5 158
Cole Creek 7850 12.2 15.5 79 9.5 13.8 69
Evening Star 9200 38.7 24.6 157 45.5 27.9 163
Fisher Creek 9100 44.0 31.8 138 48.1 32.4 148
Northeast Entrance 7350 6.2 8.2 76 20.9 12.6 166
Parker Peak 9400 37.4 20.4 183 35.2 18.1 194
Sylvan Lake 8420 24.4 19.9 123 38.0 22.8 167
Thumb Divide 7980 21.5 14.5 148 28.3 18.9 150
Two Ocean Plateau 9240 -M 27.0 * -M 27.7 *
White Mill 8700 37.4 23.4 160 36.9 24.2 152
Wolverine 7650 4.3 8.9 48 21.4 12.5 171
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Basin Index (%) 136 152
WIND RIVER
Burroughs Creek 8750 22.7 -M * 28.0 -M *
Castle Creek 8400 9.7 -M * 16.0 -M *
Cold Springs 9630 16.9 5.9 286 20.4 10.3 198
Deer Park 9700 33.4 16.1 207 38.6 20.6 187
Hobbs Park 10100 30.3 14.9 203 29.2 14.1 207
Kirwin 9550 -M 9.9 * 25.9 11.9 218
Little Warm 9370 18.9 10.3 183 25.4 13.3 191
Owl Creek 8975 10.0 5.3 189 13.5 6.3 214
South Pass 9040 32.4 15.8 205 29.1 18.0 162
St. Lawrence Alt 8620 9.6 6.6 145 17.6 9.4 187
Togwotee Pass 9580 33.9 22.9 148 39.4 24.8 159
Townsend Creek 8700 18.2 10.0 182 23.7 12.7 187
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Basin Index (%) 189 186
BIGHORN BASIN
Bald Mtn. 9380 20.9 19.4 108 18.1 17.6 103
Bear Trap Meadow 8200 5.0 4.5 111 9.7 9.0 108
Bone Springs Div 9350 20.8 16.9 123 19.0 16.1 118
Grave Springs 8550 7.5 9.6 78 8.8 11.1 79
Kirwin 9550 -M 9.9 * 25.9 11.9 218
Marquette 8760 14.5 -M * 18.2 -M *
Middle Powder 7760 8.8 12.4 71 8.7 12.3 71
Owl Creek 8975 10.0 5.3 189 13.5 6.3 214
Powder River Pass 9480 9.5 10.2 93 14.5 13.1 111
Shell Creek 9580 18.6 15.6 119 15.8 14.3 110
Timber Creek 7950 7.7 5.2 148 11.9 7.8 153
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Basin Index (%) 110 122
SHOSHONE RIVER
Blackwater 9780 38.6 23.6 164 42.9 21.2 202
Evening Star 9200 38.7 24.6 157 45.5 27.9 163
Marquette 8760 14.5 -M * 18.2 -M *
Sylvan Road 7120 -M 10.3 * 30.7 17.0 181
Younts Peak 8350 26.0 14.7 177 31.8 16.1 198
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Basin Index (%) 164 184
POWDER RIVER
Bear Trap Meadow 8200 5.0 4.5 111 9.7 9.0 108
Cloud Peak Reservoir 9860 17.6 15.4 114 20.3 14.0 145
Grave Springs 8550 7.5 9.6 78 8.8 11.1 79
Hansen Sawmill 8360 12.1 6.0 202 15.8 9.0 176
Middle Powder 7760 8.8 12.4 71 8.7 12.3 71
Powder River Pass 9480 9.5 10.2 93 14.5 13.1 111
Soldier Park 8720 15.7 -M * 15.9 -M *
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Basin Index (%) 104 114
TONGUE RIVER
Big Goose 7990 12.4 9.8 127 15.2 12.1 126
Bone Springs Div 9350 20.8 16.9 123 19.0 16.1 118
Burgess Junction 7880 11.2 12.2 92 13.0 12.9 101
Dome Lake 8880 17.1 12.0 142 17.7 14.3 124
Little Goose 8870 14.8 -M * 18.8 -M *
Sucker Creek 8880 13.8 12.6 110 15.1 15.1 100
Tie Creek 6870 2.5 5.0 50 14.5 12.2 119
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Basin Index (%) 114 114
BELLE FOURCHE
Cole Canyon 5910 .0 3.5 0 8.0 9.9 81
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Basin Index (%) 0 81
CHEYENNE RIVER BASIN
Blind Park 6890 .0 5.5 0 9.7 12.4 78
North Rapid Creek 6130 .0 5.7 0 8.2 10.3 80
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Basin Index (%) 0 79
UPPER N. PLATTE
Arapaho Ridge 10960 24.9 21.6 115 26.4 23.7 111
Blackhall Mtn 9820 36.3 -M * 38.1 -M *
Columbine 9160 15.3 22.2 69 27.7 26.2 106
Divide Peak 8880 14.8 20.2 73 23.3 22.2 105
Joe Wright 10120 17.8 22.0 81 28.8 26.8 107
Laprele Creek 8375 8.8 9.2 96 12.9 13.1 98
Med Bow 10500 36.9 -M * 35.7 -M *
North French Creek 10130 25.0 31.5 79 27.9 27.6 101
Never Summer 10280 21.8 20.6 106 19.6 -M *
Old Battle 10000 36.6 32.2 114 38.9 36.0 108
Rawah 9020 6.9 9.8 70 17.5 15.0 117
Sage Creek Basin 7850 2.5 9.4 27 16.8 15.0 112
Sand Lake 10050 31.0 30.2 103 28.1 25.8 109
South Brush Creek 8440 -M 11.2 * 13.4 15.9 84
Tower 10500 39.3 47.4 83 44.2 41.0 108
Webber Springs 9250 26.2 23.5 111 33.8 27.6 122
Willow Creek Pass 9540 18.1 12.6 144 18.6 14.0 133
Zirkel 9340 -M 24.3 * 42.6 29.2 146
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Basin Index (%) 93 112
SWEETWATER
Deer Park 9700 33.4 16.1 207 38.6 20.6 187
Larsen Creek 9000 14.6 10.9 134 23.6 -M *
South Pass 9040 32.4 15.8 205 29.1 18.0 162
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Basin Index (%) 188 175
LOWER N. PLATTE
Casper Mtn. 7900 11.3 14.5 78 13.7 15.9 86
Laprele Creek 8375 8.8 9.2 96 12.9 13.1 98
Reno Hill 8400 12.7 14.2 89 15.5 16.4 95
Windy Peak 7900 6.7 7.5 89 12.1 11.1 109
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Basin Index (%) 87 96
LARAMIE RIVER
Brooklyn Lake 10240 22.4 22.3 100 23.6 21.9 108
Cinnabar Park 9574 15.6 21.2 74 22.6 24.9 91
Crow Creek 8330 .0 4.8 0 9.3 11.4 82
Deadman Hill 10220 21.6 16.6 130 20.8 18.1 115
Rawah 9020 6.9 9.8 70 17.5 15.0 117
Roach 9700 16.2 16.5 98 21.7 19.9 109
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Basin Index (%) 91 104
S. PLATTE
Black Mountain 8920 9.8 -M * 13.3 -M *
Crow Creek 8330 .0 4.8 0 9.3 11.4 82
Deadman Hill 10220 21.6 16.6 130 20.8 18.1 115
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Basin Index (%) 101 102
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 7.2 * 17.1 15.5 110
Divide Peak 8880 14.8 20.2 73 23.3 22.2 105
Elk River 8700 10.0 17.5 57 20.5 20.7 99
Little Snake River 8915 24.9 25.9 96 39.2 30.7 128
Old Battle 10000 36.6 32.2 114 38.9 36.0 108
Sage Creek Basin 7850 2.5 9.4 27 16.8 15.0 112
Sandstone RS 8150 3.5 12.1 29 16.4 18.9 87
Whiskey Park 8950 24.3 27.2 89 30.6 28.7 107
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Basin Index (%) 81 108
UPPER GREEN RIVER
Big Sandy Opening 9080 21.1 12.9 164 23.6 13.6 174
Blind Bull Sum 8650 44.2 23.8 186 -M 19.7 *
East Rim Divide 7930 14.2 10.0 142 21.0 11.9 176
Elkhart Park G.S. 9400 19.6 12.1 162 24.7 13.6 182
Gros Ventre Summit 8750 20.4 12.9 158 24.9 13.2 189
Gunsight Pass 9820 23.8 13.5 176 25.7 14.2 181
Kendall R.S. 7740 18.3 10.1 181 29.5 14.4 205
Loomis Park 8240 25.9 13.7 189 32.7 17.5 187
New Fork Lake 8340 14.5 9.7 149 18.2 10.9 167
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 17.8 11.8 151 27.9 14.4 194
Spring Creek Divide 9000 42.2 23.1 183 41.2 24.2 170
Triple Peak 8500 36.0 20.0 180 41.6 25.6 162
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Basin Index (%) 172 179
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.6 -M * 16.5 -M *
Buck Pasture 9632 17.2 -M * 24.2 -M *
EF Blacks Fork GS 9360 13.8 -M * 17.9 -M *
Hams Fork 7840 12.6 8.9 142 22.0 11.6 190
Hewinta 9500 8.1 10.0 81 17.9 14.5 123
Hickerson Park 9122 8.0 6.9 116 13.5 10.7 126
Hole-in-Rock 9168 6.7 7.0 96 14.0 10.1 139
Indian Creek 9425 41.0 24.1 170 41.8 23.0 182
Kelley R.S. 8180 25.3 13.9 182 31.2 18.4 170
Spirit Lk 10235 15.9 -M * 19.2 -M *
Steel Creek Park 10158 19.5 16.1 121 21.7 17.2 126
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Basin Index (%) 139 154
UPPER BEAR RIVER
Bear River RS 8777 6.7 -M * 19.1 -M *
Bug Lake 7987 32.7 19.2 170 34.8 19.9 175
Burts Miller Ranch 8000 .1 -M * 10.6 -M *
Chalk Creek #1 9171 34.0 24.8 137 37.1 26.0 143
Hayden Fork 9130 17.0 14.2 120 30.4 21.7 140
Kelley R.S. 8180 25.3 13.9 182 31.2 18.4 170
Lily Lake 9133 12.5 12.6 99 20.5 17.7 116
Monte Cristo 8932 37.2 27.8 134 40.5 26.7 152
Salt River Summit 7760 19.4 11.5 169 -M 17.0 *
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Basin Index (%) 144 149
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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.