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 4 , 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 24.3 15.0 162 39.1 20.4 192
Black Bear 8170 44.9 37.0 121 52.5 37.3 141
Blind Bull Sum 8650 42.2 23.0 183 -M 19.1 *
Cottonwood Creek 7670 27.0 21.2 127 36.9 24.1 153
East Rim Divide 7930 16.1 10.2 158 20.6 11.5 179
Grand Targhee 9260 44.3 37.6 118 39.2 30.2 130
Granite Creek 6770 26.5 14.7 180 35.5 19.3 184
Grassy Lake 7265 36.3 31.6 115 53.9 35.2 153
Gros Ventre Summit 8750 -M 13.0 * -M 12.6 *
Gunsight Pass 9820 22.5 13.6 165 24.3 13.4 181
Lewis Lake Divide 7850 44.8 29.6 151 54.6 34.6 158
Phillips Bench 8200 36.7 24.7 149 45.7 27.5 166
Salt River Summit 7760 19.3 13.0 148 28.2 16.3 173
Snake River Station 6920 18.6 15.1 123 35.3 21.9 161
Spring Creek Divide 9000 39.8 22.5 177 39.4 23.3 169
Thumb Divide 7980 22.5 14.7 153 27.6 18.1 152
Togwotee Pass 9580 33.0 21.8 151 37.7 23.7 159
Two Ocean Plateau 9240 -M 25.7 * -M 26.5 *
Willow Creek 8380 28.1 28.2 100 47.8 32.8 146
Younts Peak 8350 25.3 14.2 178 30.6 15.4 199
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Basin Index (%) 142 160
MADISON-GALLATIN
Black Bear 8170 44.9 37.0 121 52.5 37.3 141
Canyon 7870 17.6 12.4 142 25.3 15.8 160
Madison Plateau 7750 26.5 21.4 124 35.3 25.6 138
West Yellowstone 6700 7.4 10.0 74 22.6 13.8 164
Whiskey Creek 6800 13.3 15.0 89 26.2 19.6 134
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Basin Index (%) 115 144
YELLOWSTONE
Beartooth Lake 9360 32.3 21.2 152 27.4 19.2 143
Burnt Mtn 5880 .0 4.6 0 14.7 12.6 117
Canyon 7870 17.6 12.4 142 25.3 15.8 160
Cole Creek 7850 12.3 14.1 87 8.8 12.4 71
Evening Star 9200 37.9 23.8 159 44.3 26.5 167
Fisher Creek 9100 42.7 30.8 139 46.2 30.8 150
Northeast Entrance 7350 8.8 9.2 96 20.1 11.9 169
Parker Peak 9400 34.2 19.1 179 33.7 17.1 197
Sylvan Lake 8420 23.7 19.3 123 36.9 21.7 170
Thumb Divide 7980 22.5 14.7 153 27.6 18.1 152
Two Ocean Plateau 9240 -M 25.7 * -M 26.5 *
White Mill 8700 35.2 21.9 161 35.3 23.1 153
Wolverine 7650 6.3 9.4 67 20.6 11.9 173
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Basin Index (%) 136 154
WIND RIVER
Burroughs Creek 8750 23.2 -M * 27.1 -M *
Castle Creek 8400 11.0 -M * 15.3 -M *
Cold Springs 9630 17.2 7.0 246 19.6 9.7 202
Deer Park 9700 32.5 15.1 215 37.6 19.3 195
Hobbs Park 10100 29.2 13.8 212 27.4 13.0 211
Kirwin 9550 23.1 9.5 243 25.0 11.2 223
Little Warm 9370 18.5 10.2 181 24.1 12.5 193
Owl Creek 8975 10.3 5.7 181 12.4 5.9 210
South Pass 9040 31.2 15.1 207 28.4 17.0 167
St. Lawrence Alt 8620 10.5 6.8 154 17.0 8.7 195
Togwotee Pass 9580 33.0 21.8 151 37.7 23.7 159
Townsend Creek 8700 18.5 9.3 199 22.6 11.7 193
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Basin Index (%) 196 190
BIGHORN BASIN
Bald Mtn. 9380 19.4 18.9 103 16.6 16.5 101
Bear Trap Meadow 8200 5.2 5.1 102 8.5 8.2 104
Bone Springs Div 9350 19.9 16.4 121 17.7 15.1 117
Grave Springs 8550 7.0 9.1 77 7.6 10.2 75
Kirwin 9550 23.1 9.5 243 25.0 11.2 223
Marquette 8760 14.0 -M * 17.5 -M *
Middle Powder 7760 7.4 11.7 63 7.2 11.3 64
Owl Creek 8975 10.3 5.7 181 12.4 5.9 210
Powder River Pass 9480 9.1 10.1 90 13.0 12.2 107
Shell Creek 9580 17.3 14.8 117 14.2 13.4 106
Timber Creek 7950 8.4 4.9 171 11.6 7.2 161
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Basin Index (%) 120 120
SHOSHONE RIVER
Blackwater 9780 37.6 22.3 169 41.7 20.0 208
Evening Star 9200 37.9 23.8 159 44.3 26.5 167
Marquette 8760 14.0 -M * 17.5 -M *
Sylvan Road 7120 8.6 11.0 78 30.4 16.3 187
Younts Peak 8350 25.3 14.2 178 30.6 15.4 199
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Basin Index (%) 153 188
POWDER RIVER
Bear Trap Meadow 8200 5.2 5.1 102 8.5 8.2 104
Cloud Peak Reservoir 9860 16.4 14.4 114 17.9 12.9 139
Grave Springs 8550 7.0 9.1 77 7.6 10.2 75
Hansen Sawmill 8360 11.6 6.2 187 14.1 8.3 170
Middle Powder 7760 7.4 11.7 63 7.2 11.3 64
Powder River Pass 9480 9.1 10.1 90 13.0 12.2 107
Soldier Park 8720 15.3 -M * 14.0 -M *
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Basin Index (%) 100 108
TONGUE RIVER
Big Goose 7990 12.2 9.3 131 13.9 11.1 125
Bone Springs Div 9350 19.9 16.4 121 17.7 15.1 117
Burgess Junction 7880 10.8 11.6 93 11.7 12.0 98
Dome Lake 8880 16.6 11.6 143 16.6 13.2 126
Little Goose 8870 14.0 -M * 17.2 -M *
Sucker Creek 8880 13.7 11.8 116 13.8 14.0 99
Tie Creek 6870 4.6 5.5 84 13.8 11.3 122
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Basin Index (%) 118 114
BELLE FOURCHE
Cole Canyon 5910 .1 5.6 2 7.0 9.1 77
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Basin Index (%) 2 77
CHEYENNE RIVER BASIN
Blind Park 6890 .3 7.1 4 9.0 11.5 78
North Rapid Creek 6130 .4 6.7 6 7.5 9.5 79
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Basin Index (%) 5 79
UPPER N. PLATTE
Arapaho Ridge 10960 24.6 20.4 121 25.2 21.8 116
Blackhall Mtn 9820 35.5 -M * 36.7 -M *
Columbine 9160 18.6 23.3 80 26.8 25.0 107
Divide Peak 8880 15.5 19.7 79 21.9 21.0 104
Joe Wright 10120 17.7 20.6 86 27.5 25.2 109
Laprele Creek 8375 11.0 9.4 117 12.1 12.2 99
Med Bow 10500 37.7 -M * 34.4 -M *
North French Creek 10130 24.1 28.7 84 26.8 26.1 103
Never Summer 10280 21.2 20.0 106 18.4 -M *
Old Battle 10000 35.8 30.7 117 37.5 34.2 110
Rawah 9020 9.3 10.4 89 16.4 13.8 119
Sage Creek Basin 7850 6.7 12.5 54 16.1 14.2 113
Sand Lake 10050 30.0 28.3 106 26.8 24.2 111
South Brush Creek 8440 4.8 12.1 40 11.9 14.9 80
Tower 10500 39.3 45.1 87 42.7 38.9 110
Webber Springs 9250 25.6 23.0 111 32.7 26.1 125
Willow Creek Pass 9540 17.2 12.0 143 17.9 13.1 137
Zirkel 9340 31.9 26.3 121 41.2 27.8 148
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Basin Index (%) 97 113
SWEETWATER
Deer Park 9700 32.5 15.1 215 37.6 19.3 195
Larsen Creek 9000 17.3 11.9 145 22.9 -M *
South Pass 9040 31.2 15.1 207 28.4 17.0 167
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Basin Index (%) 192 182
LOWER N. PLATTE
Casper Mtn. 7900 11.1 14.0 79 12.4 14.4 86
Laprele Creek 8375 11.0 9.4 117 12.1 12.2 99
Reno Hill 8400 12.5 13.7 91 13.6 14.9 91
Windy Peak 7900 8.6 7.8 110 11.3 10.2 111
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Basin Index (%) 96 96
LARAMIE RIVER
Brooklyn Lake 10240 22.7 21.0 108 22.6 20.6 110
Cinnabar Park 9574 17.9 20.6 87 21.9 23.6 93
Crow Creek 8330 .2 7.0 3 9.2 10.5 88
Deadman Hill 10220 20.3 15.9 128 19.8 16.9 117
Rawah 9020 9.3 10.4 89 16.4 13.8 119
Roach 9700 16.3 16.1 101 20.4 18.8 109
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Basin Index (%) 95 106
S. PLATTE
Black Mountain 8920 10.7 -M * 12.5 -M *
Crow Creek 8330 .2 7.0 3 9.2 10.5 88
Deadman Hill 10220 20.3 15.9 128 19.8 16.9 117
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Basin Index (%) 90 106
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 10.2 * 16.5 14.7 112
Divide Peak 8880 15.5 19.7 79 21.9 21.0 104
Elk River 8700 13.4 19.1 70 19.9 19.6 102
Little Snake River 8915 26.9 24.2 111 38.0 29.1 131
Old Battle 10000 35.8 30.7 117 37.5 34.2 110
Sage Creek Basin 7850 6.7 12.5 54 16.1 14.2 113
Sandstone RS 8150 7.0 12.9 54 15.8 18.0 88
Whiskey Park 8950 25.4 26.8 95 29.5 27.3 108
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Basin Index (%) 90 110
UPPER GREEN RIVER
Big Sandy Opening 9080 20.7 12.4 167 23.0 12.9 178
Blind Bull Sum 8650 42.2 23.0 183 -M 19.1 *
East Rim Divide 7930 16.1 10.2 158 20.6 11.5 179
Elkhart Park G.S. 9400 18.8 12.2 154 23.9 13.0 184
Gros Ventre Summit 8750 -M 13.0 * -M 12.6 *
Gunsight Pass 9820 22.5 13.6 165 24.3 13.4 181
Kendall R.S. 7740 20.5 11.5 178 28.7 13.9 206
Loomis Park 8240 26.5 14.0 189 31.8 16.9 188
New Fork Lake 8340 15.9 10.3 154 17.5 10.5 167
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.4 12.3 150 26.9 13.9 194
Spring Creek Divide 9000 39.8 22.5 177 39.4 23.3 169
Triple Peak 8500 35.3 21.9 161 40.1 24.8 162
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Basin Index (%) 169 179
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.6 -M * 16.0 -M *
Buck Pasture 9632 17.9 -M * 23.7 -M *
EF Blacks Fork GS 9360 15.5 -M * 17.3 -M *
Hams Fork 7840 14.5 10.9 133 21.1 11.1 190
Hewinta 9500 9.4 11.0 85 17.3 13.7 126
Hickerson Park 9122 9.9 7.7 129 13.1 10.0 131
Hole-in-Rock 9168 7.9 6.9 114 13.6 9.4 145
Indian Creek 9425 39.4 24.3 162 -M 22.1 *
Kelley R.S. 8180 25.1 15.0 167 30.0 17.7 169
Spirit Lk 10235 16.7 -M * 18.8 -M *
Steel Creek Park 10158 19.1 15.6 122 21.2 16.1 132
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Basin Index (%) 137 149
UPPER BEAR RIVER
Bear River RS 8777 10.2 -M * 18.5 -M *
Bug Lake 7987 31.8 18.2 175 33.6 19.0 177
Burts Miller Ranch 8000 3.5 -M * 10.0 -M *
Chalk Creek #1 9171 33.5 23.9 140 36.1 24.7 146
Hayden Fork 9130 21.2 15.3 139 29.7 20.6 144
Kelley R.S. 8180 25.1 15.0 167 30.0 17.7 169
Lily Lake 9133 14.2 12.4 115 20.0 16.7 120
Monte Cristo 8932 35.9 27.2 132 38.7 25.4 152
Salt River Summit 7760 19.3 13.0 148 28.2 16.3 173
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Basin Index (%) 145 154
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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.