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 7 , 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 15.2 158 39.2 20.6 190
Black Bear 8170 45.4 37.2 122 52.7 37.8 139
Blind Bull Sum 8650 42.6 23.2 184 -M 19.3 *
Cottonwood Creek 7670 27.1 21.0 129 37.2 24.3 153
East Rim Divide 7930 15.7 10.2 154 20.9 11.6 180
Grand Targhee 9260 44.5 38.5 116 39.5 30.6 129
Granite Creek 6770 26.0 14.5 179 35.7 19.5 183
Grassy Lake 7265 36.3 31.5 115 53.9 35.5 152
Gros Ventre Summit 8750 19.7 12.9 153 23.9 12.8 187
Gunsight Pass 9820 22.4 13.8 162 24.4 13.7 178
Lewis Lake Divide 7850 45.3 29.9 152 54.6 34.9 156
Phillips Bench 8200 37.1 25.4 146 45.8 27.8 165
Salt River Summit 7760 19.2 12.8 150 28.5 16.5 173
Snake River Station 6920 18.3 14.9 123 35.3 22.1 160
Spring Creek Divide 9000 40.0 22.5 178 39.6 23.5 169
Thumb Divide 7980 22.5 14.7 153 27.6 18.4 150
Togwotee Pass 9580 33.0 22.1 149 38.1 24.0 159
Two Ocean Plateau 9240 -M 26.0 * -M 26.8 *
Willow Creek 8380 27.5 28.4 97 48.0 33.2 145
Younts Peak 8350 25.7 14.3 180 31.1 15.6 199
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Basin Index (%) 142 160
MADISON-GALLATIN
Black Bear 8170 45.4 37.2 122 52.7 37.8 139
Canyon 7870 17.0 12.4 137 25.4 16.0 159
Madison Plateau 7750 26.4 21.5 123 35.4 26.0 136
West Yellowstone 6700 6.7 9.5 71 22.6 14.1 160
Whiskey Creek 6800 13.3 14.8 90 26.5 19.9 133
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Basin Index (%) 114 143
YELLOWSTONE
Beartooth Lake 9360 32.5 21.3 153 27.7 19.4 143
Burnt Mtn 5880 .1 4.5 2 14.7 12.9 114
Canyon 7870 17.0 12.4 137 25.4 16.0 159
Cole Creek 7850 12.1 14.6 83 9.0 12.8 70
Evening Star 9200 38.3 23.8 161 44.4 26.9 165
Fisher Creek 9100 42.8 31.2 137 46.3 31.2 148
Northeast Entrance 7350 8.0 9.0 89 20.2 12.0 168
Parker Peak 9400 34.8 19.4 179 34.0 17.4 195
Sylvan Lake 8420 23.7 19.4 122 37.0 21.9 169
Thumb Divide 7980 22.5 14.7 153 27.6 18.4 150
Two Ocean Plateau 9240 -M 26.0 * -M 26.8 *
White Mill 8700 35.6 22.2 160 35.5 23.3 152
Wolverine 7650 6.4 9.6 67 20.9 12.0 174
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Basin Index (%) 135 153
WIND RIVER
Burroughs Creek 8750 23.2 -M * 27.6 -M *
Castle Creek 8400 11.0 -M * 15.7 -M *
Cold Springs 9630 17.3 6.7 258 19.9 9.9 201
Deer Park 9700 32.5 15.6 208 37.6 19.8 190
Hobbs Park 10100 29.6 14.1 210 28.1 13.4 210
Kirwin 9550 -M 9.6 * 25.3 11.4 222
Little Warm 9370 18.6 10.2 182 24.3 12.7 191
Owl Creek 8975 10.3 5.8 178 12.6 6.0 210
South Pass 9040 31.2 15.2 205 28.6 17.3 165
St. Lawrence Alt 8620 10.7 6.9 155 17.2 8.9 193
Togwotee Pass 9580 33.0 22.1 149 38.1 24.0 159
Townsend Creek 8700 18.6 9.7 192 22.9 12.0 191
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Basin Index (%) 190 188
BIGHORN BASIN
Bald Mtn. 9380 19.6 19.1 103 16.9 16.8 101
Bear Trap Meadow 8200 5.1 4.9 104 8.8 8.5 104
Bone Springs Div 9350 20.0 16.9 118 18.1 15.4 118
Grave Springs 8550 7.0 9.4 74 7.9 10.6 75
Kirwin 9550 -M 9.6 * 25.3 11.4 222
Marquette 8760 14.2 -M * 17.8 -M *
Middle Powder 7760 7.4 12.0 62 7.7 11.6 66
Owl Creek 8975 10.3 5.8 178 12.6 6.0 210
Powder River Pass 9480 9.1 10.2 89 13.5 12.5 108
Shell Creek 9580 17.5 15.1 116 14.6 13.6 107
Timber Creek 7950 8.3 4.9 169 11.6 7.3 159
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Basin Index (%) 106 120
SHOSHONE RIVER
Blackwater 9780 37.8 22.6 167 41.9 20.3 206
Evening Star 9200 38.3 23.8 161 44.4 26.9 165
Marquette 8760 14.2 -M * 17.8 -M *
Sylvan Road 7120 7.2 10.8 67 30.2 16.5 183
Younts Peak 8350 25.7 14.3 180 31.1 15.6 199
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Basin Index (%) 152 186
POWDER RIVER
Bear Trap Meadow 8200 5.1 4.9 104 8.8 8.5 104
Cloud Peak Reservoir 9860 16.7 14.8 113 18.3 13.2 139
Grave Springs 8550 7.0 9.4 74 7.9 10.6 75
Hansen Sawmill 8360 11.5 6.1 189 14.2 8.5 167
Middle Powder 7760 7.4 12.0 62 7.7 11.6 66
Powder River Pass 9480 9.1 10.2 89 13.5 12.5 108
Soldier Park 8720 15.2 -M * 14.3 -M *
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Basin Index (%) 99 108
TONGUE RIVER
Big Goose 7990 12.1 9.6 126 14.2 11.4 125
Bone Springs Div 9350 20.0 16.9 118 18.1 15.4 118
Burgess Junction 7880 10.8 11.9 91 12.1 12.3 98
Dome Lake 8880 16.6 11.8 141 16.8 13.5 124
Little Goose 8870 14.0 -M * 17.3 -M *
Sucker Creek 8880 13.6 12.1 112 14.0 14.3 98
Tie Creek 6870 4.4 5.6 79 13.8 11.7 118
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Basin Index (%) 114 113
BELLE FOURCHE
Cole Canyon 5910 .0 5.1 0 7.4 9.5 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 7.0 0 9.1 11.8 77
North Rapid Creek 6130 .0 6.5 0 7.6 9.9 77
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Basin Index (%) 0 77
UPPER N. PLATTE
Arapaho Ridge 10960 25.3 20.9 121 26.0 22.3 117
Blackhall Mtn 9820 35.6 -M * 37.4 -M *
Columbine 9160 18.8 23.4 80 27.1 25.4 107
Divide Peak 8880 16.3 19.9 82 22.5 21.3 106
Joe Wright 10120 18.8 21.2 89 28.6 25.6 112
Laprele Creek 8375 10.9 9.4 116 12.5 12.5 100
Med Bow 10500 38.2 -M * 34.8 -M *
North French Creek 10130 24.1 29.4 82 27.1 26.6 102
Never Summer 10280 21.9 20.3 108 19.3 -M *
Old Battle 10000 35.9 31.3 115 38.0 34.7 110
Rawah 9020 9.4 10.6 89 16.9 14.2 119
Sage Creek Basin 7850 6.5 11.9 55 16.5 14.6 113
Sand Lake 10050 30.6 28.8 106 27.4 24.6 111
South Brush Creek 8440 4.0 11.9 34 12.6 15.1 83
Tower 10500 39.2 45.8 86 43.3 39.6 109
Webber Springs 9250 26.1 23.1 113 33.1 26.6 124
Willow Creek Pass 9540 18.0 12.2 148 18.6 13.3 140
Zirkel 9340 32.2 26.3 122 41.8 28.4 147
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Basin Index (%) 98 114
SWEETWATER
Deer Park 9700 32.5 15.6 208 37.6 19.8 190
Larsen Creek 9000 16.9 11.6 146 23.2 -M *
South Pass 9040 31.2 15.2 205 28.6 17.3 165
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Basin Index (%) 190 178
LOWER N. PLATTE
Casper Mtn. 7900 11.5 14.3 80 12.9 15.0 86
Laprele Creek 8375 10.9 9.4 116 12.5 12.5 100
Reno Hill 8400 12.6 14.0 90 14.3 15.5 92
Windy Peak 7900 8.8 7.7 114 11.7 10.5 111
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Basin Index (%) 96 96
LARAMIE RIVER
Brooklyn Lake 10240 22.7 21.8 104 23.0 21.0 110
Cinnabar Park 9574 17.5 21.2 83 22.2 24.0 92
Crow Creek 8330 .1 7.0 1 9.3 10.8 86
Deadman Hill 10220 20.8 16.1 129 20.3 17.2 118
Rawah 9020 9.4 10.6 89 16.9 14.2 119
Roach 9700 16.7 16.6 101 21.1 19.1 110
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Basin Index (%) 93 106
S. PLATTE
Black Mountain 8920 11.3 -M * 13.1 -M *
Crow Creek 8330 .1 7.0 1 9.3 10.8 86
Deadman Hill 10220 20.8 16.1 129 20.3 17.2 118
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Basin Index (%) 90 106
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 9.5 * 16.6 14.9 111
Divide Peak 8880 16.3 19.9 82 22.5 21.3 106
Elk River 8700 12.9 19.2 67 20.2 19.9 102
Little Snake River 8915 26.9 25.2 107 38.3 29.7 129
Old Battle 10000 35.9 31.3 115 38.0 34.7 110
Sage Creek Basin 7850 6.5 11.9 55 16.5 14.6 113
Sandstone RS 8150 6.3 12.8 49 16.2 18.2 89
Whiskey Park 8950 25.9 27.4 95 29.7 27.8 107
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Basin Index (%) 88 109
UPPER GREEN RIVER
Big Sandy Opening 9080 21.0 12.6 167 23.1 13.1 176
Blind Bull Sum 8650 42.6 23.2 184 -M 19.3 *
East Rim Divide 7930 15.7 10.2 154 20.9 11.6 180
Elkhart Park G.S. 9400 19.1 12.3 155 24.0 13.2 182
Gros Ventre Summit 8750 19.7 12.9 153 23.9 12.8 187
Gunsight Pass 9820 22.4 13.8 162 24.4 13.7 178
Kendall R.S. 7740 19.9 11.4 175 28.9 14.1 205
Loomis Park 8240 26.6 13.8 193 31.9 17.1 187
New Fork Lake 8340 15.3 10.3 149 17.7 10.7 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.0 12.3 146 27.0 14.0 193
Spring Creek Divide 9000 40.0 22.5 178 39.6 23.5 169
Triple Peak 8500 35.6 21.8 163 40.1 25.0 160
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Basin Index (%) 167 179
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.4 -M * 16.0 -M *
Buck Pasture 9632 17.8 -M * 23.6 -M *
EF Blacks Fork GS 9360 15.6 -M * 17.4 -M *
Hams Fork 7840 14.0 10.6 132 21.4 11.3 189
Hewinta 9500 9.6 10.9 88 17.4 14.0 124
Hickerson Park 9122 9.5 7.9 120 13.3 10.2 130
Hole-in-Rock 9168 7.8 7.0 111 13.8 9.7 142
Indian Creek 9425 40.2 24.7 163 -M 22.3 *
Kelley R.S. 8180 24.9 14.7 169 30.0 17.9 168
Spirit Lk 10235 16.7 -M * 18.8 -M *
Steel Creek Park 10158 19.2 15.8 122 21.1 16.4 129
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Basin Index (%) 137 147
UPPER BEAR RIVER
Bear River RS 8777 9.4 -M * 18.6 -M *
Bug Lake 7987 31.9 18.4 173 33.7 19.2 176
Burts Miller Ranch 8000 2.8 -M * 10.2 -M *
Chalk Creek #1 9171 33.6 24.4 138 36.0 25.0 144
Hayden Fork 9130 20.8 15.4 135 29.8 21.0 142
Kelley R.S. 8180 24.9 14.7 169 30.0 17.9 168
Lily Lake 9133 14.0 12.6 111 20.0 17.0 118
Monte Cristo 8932 35.9 27.7 130 38.8 25.7 151
Salt River Summit 7760 19.2 12.8 150 28.5 16.5 173
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Basin Index (%) 143 152
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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.