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: MARCH 21 , 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 14.7 165 37.6 19.1 197
Black Bear 8170 44.2 32.7 135 49.6 34.7 143
Blind Bull Sum 8650 40.8 20.6 198 -M 17.7 *
Cottonwood Creek 7670 25.3 20.1 126 34.5 22.0 157
East Rim Divide 7930 17.6 9.6 183 19.8 10.6 187
Grand Targhee 9260 41.1 33.1 124 37.5 27.2 138
Granite Creek 6770 29.0 14.9 195 34.5 18.2 190
Grassy Lake 7265 -M 29.4 * 50.7 32.8 155
Gros Ventre Summit 8750 -M 11.7 * -M 11.5 *
Gunsight Pass 9820 19.8 12.1 164 22.4 12.2 184
Lewis Lake Divide 7850 40.0 27.9 143 51.7 32.2 161
Phillips Bench 8200 34.2 22.5 152 44.2 25.4 174
Salt River Summit 7760 19.5 12.1 161 26.9 15.0 179
Snake River Station 6920 19.6 15.3 128 33.4 20.5 163
Spring Creek Divide 9000 36.8 21.3 173 37.1 21.5 173
Thumb Divide 7980 22.2 14.2 156 26.4 16.6 159
Togwotee Pass 9580 30.9 20.7 149 35.5 21.8 163
Two Ocean Plateau 9240 -M 24.1 * -M 24.5 *
Willow Creek 8380 29.6 25.4 117 45.5 30.1 151
Younts Peak 8350 26.6 13.5 197 29.7 14.2 209
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Basin Index (%) 152 165
MADISON-GALLATIN
Black Bear 8170 44.2 32.7 135 49.6 34.7 143
Canyon 7870 16.9 11.8 143 24.2 14.6 166
Madison Plateau 7750 25.7 20.1 128 33.5 23.8 141
West Yellowstone 6700 10.6 9.9 107 21.7 12.8 170
Whiskey Creek 6800 14.0 14.2 99 24.7 18.2 136
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Basin Index (%) 126 148
YELLOWSTONE
Beartooth Lake 9360 30.7 19.5 157 26.0 17.8 146
Burnt Mtn 5880 2.8 4.6 61 12.4 11.0 113
Canyon 7870 16.9 11.8 143 24.2 14.6 166
Cole Creek 7850 9.6 12.1 79 6.7 10.8 62
Evening Star 9200 36.4 22.4 162 41.7 24.6 170
Fisher Creek 9100 41.2 28.3 146 44.0 28.7 153
Northeast Entrance 7350 10.6 9.1 116 19.1 11.0 174
Parker Peak 9400 31.5 17.7 178 32.1 15.7 204
Sylvan Lake 8420 22.7 18.2 125 35.0 20.1 174
Thumb Divide 7980 22.2 14.2 156 26.4 16.6 159
Two Ocean Plateau 9240 -M 24.1 * -M 24.5 *
White Mill 8700 32.8 20.0 164 33.6 21.3 158
Wolverine 7650 11.2 8.9 126 20.1 11.0 183
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Basin Index (%) 144 158
WIND RIVER
Burroughs Creek 8750 23.7 -M * 25.5 -M *
Castle Creek 8400 11.4 -M * 14.5 -M *
Cold Springs 9630 11.8 6.4 184 14.9 8.6 173
Deer Park 9700 27.0 13.5 200 32.2 17.3 186
Hobbs Park 10100 21.8 11.9 183 20.4 11.2 182
Kirwin 9550 19.0 8.4 226 21.3 10.0 213
Little Warm 9370 15.8 9.3 170 21.4 11.2 191
Owl Creek 8975 6.8 4.6 148 9.1 5.0 182
South Pass 9040 25.4 14.0 181 23.8 15.5 154
St. Lawrence Alt 8620 5.5 6.2 89 12.0 7.6 158
Togwotee Pass 9580 30.9 20.7 149 35.5 21.8 163
Townsend Creek 8700 11.8 8.3 142 15.9 10.2 156
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Basin Index (%) 170 174
BIGHORN BASIN
Bald Mtn. 9380 17.1 16.5 104 14.7 15.0 98
Bear Trap Meadow 8200 4.5 5.1 88 6.2 7.2 86
Bone Springs Div 9350 15.9 14.2 112 14.9 13.5 110
Grave Springs 8550 5.8 8.2 71 6.0 9.0 67
Kirwin 9550 19.0 8.4 226 21.3 10.0 213
Marquette 8760 7.2 -M * 11.6 -M *
Middle Powder 7760 6.0 9.9 61 6.1 10.1 60
Owl Creek 8975 6.8 4.6 148 9.1 5.0 182
Powder River Pass 9480 6.9 9.2 75 10.5 10.9 96
Shell Creek 9580 14.8 12.9 115 11.8 11.9 99
Timber Creek 7950 4.5 4.2 107 7.0 6.2 113
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Basin Index (%) 109 109
SHOSHONE RIVER
Blackwater 9780 35.8 20.9 171 39.4 18.2 216
Evening Star 9200 36.4 22.4 162 41.7 24.6 170
Marquette 8760 7.2 -M * 11.6 -M *
Sylvan Road 7120 13.1 10.5 125 29.4 15.2 193
Younts Peak 8350 26.6 13.5 197 29.7 14.2 209
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Basin Index (%) 166 194
POWDER RIVER
Bear Trap Meadow 8200 4.5 5.1 88 6.2 7.2 86
Cloud Peak Reservoir 9860 11.8 13.0 91 13.1 11.3 116
Grave Springs 8550 5.8 8.2 71 6.0 9.0 67
Hansen Sawmill 8360 7.4 5.7 130 9.5 7.2 132
Middle Powder 7760 6.0 9.9 61 6.1 10.1 60
Powder River Pass 9480 6.9 9.2 75 10.5 10.9 96
Soldier Park 8720 11.2 -M * 9.4 -M *
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Basin Index (%) 83 92
TONGUE RIVER
Big Goose 7990 8.2 7.9 104 9.4 9.3 101
Bone Springs Div 9350 15.9 14.2 112 14.9 13.5 110
Burgess Junction 7880 8.1 9.6 84 9.1 10.6 86
Dome Lake 8880 12.4 10.3 120 12.2 11.6 105
Little Goose 8870 9.0 -M * 11.9 -M *
Sucker Creek 8880 9.8 10.9 90 9.8 12.3 80
Tie Creek 6870 2.8 5.0 56 9.9 9.8 101
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Basin Index (%) 99 97
BELLE FOURCHE
Cole Canyon 5910 1.5 5.5 27 6.4 7.9 81
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Basin Index (%) 27 81
CHEYENNE RIVER BASIN
Blind Park 6890 2.4 7.2 33 7.9 10.5 75
North Rapid Creek 6130 3.5 6.5 54 6.7 8.6 78
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Basin Index (%) 43 76
UPPER N. PLATTE
Arapaho Ridge 10960 23.0 18.1 127 23.6 19.8 119
Blackhall Mtn 9820 34.2 -M * 35.3 -M *
Columbine 9160 21.9 22.0 100 26.1 23.1 113
Divide Peak 8880 16.6 17.7 94 21.0 19.2 109
Joe Wright 10120 16.9 19.2 88 25.6 23.0 111
Laprele Creek 8375 10.4 9.2 113 10.6 10.9 97
Med Bow 10500 37.3 -M * 32.5 -M *
North French Creek 10130 23.2 25.5 91 25.2 23.8 106
Never Summer 10280 21.0 17.9 117 17.3 -M *
Old Battle 10000 35.4 26.6 133 36.4 31.6 115
Rawah 9020 9.9 9.6 103 15.1 12.3 123
Sage Creek Basin 7850 10.3 11.5 90 15.2 13.0 117
Sand Lake 10050 28.3 24.9 114 25.5 21.8 117
South Brush Creek 8440 7.6 11.2 68 11.7 13.4 87
Tower 10500 39.0 40.2 97 41.8 35.9 116
Webber Springs 9250 25.0 21.2 118 31.6 24.0 132
Willow Creek Pass 9540 16.3 11.0 148 17.1 11.8 145
Zirkel 9340 36.7 25.7 143 40.2 25.5 158
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Basin Index (%) 110 119
SWEETWATER
Deer Park 9700 27.0 13.5 200 32.2 17.3 186
Larsen Creek 9000 16.5 11.2 147 21.0 -M *
South Pass 9040 25.4 14.0 181 23.8 15.5 154
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Basin Index (%) 178 171
LOWER N. PLATTE
Casper Mtn. 7900 9.9 12.3 80 10.4 12.9 81
Laprele Creek 8375 10.4 9.2 113 10.6 10.9 97
Reno Hill 8400 10.6 12.1 88 11.8 13.1 90
Windy Peak 7900 8.6 7.2 119 10.1 9.2 110
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Basin Index (%) 97 93
LARAMIE RIVER
Brooklyn Lake 10240 24.1 17.8 135 21.7 18.6 117
Cinnabar Park 9574 17.1 18.2 94 20.8 21.5 97
Crow Creek 8330 3.0 6.9 43 8.2 8.9 92
Deadman Hill 10220 19.2 14.0 137 18.2 15.1 121
Rawah 9020 9.9 9.6 103 15.1 12.3 123
Roach 9700 15.1 14.1 107 18.4 17.0 108
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Basin Index (%) 110 110
S. PLATTE
Black Mountain 8920 9.1 -M * 10.5 -M *
Crow Creek 8330 3.0 6.9 43 8.2 8.9 92
Deadman Hill 10220 19.2 14.0 137 18.2 15.1 121
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Basin Index (%) 106 110
LITTLE SNAKE RIVER
Battle Mountain 7440 5.9 11.4 52 15.6 13.7 114
Divide Peak 8880 16.6 17.7 94 21.0 19.2 109
Elk River 8700 15.8 17.4 91 19.1 18.0 106
Little Snake River 8915 27.6 21.2 130 36.8 26.6 138
Old Battle 10000 35.4 26.6 133 36.4 31.6 115
Sage Creek Basin 7850 10.3 11.5 90 15.2 13.0 117
Sandstone RS 8150 10.6 12.4 85 15.2 16.8 90
Whiskey Park 8950 25.5 24.4 105 28.3 25.1 113
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Basin Index (%) 104 114
UPPER GREEN RIVER
Big Sandy Opening 9080 19.6 11.7 168 21.6 11.9 182
Blind Bull Sum 8650 40.8 20.6 198 -M 17.7 *
East Rim Divide 7930 17.6 9.6 183 19.8 10.6 187
Elkhart Park G.S. 9400 17.6 10.8 163 22.1 11.9 186
Gros Ventre Summit 8750 -M 11.7 * -M 11.5 *
Gunsight Pass 9820 19.8 12.1 164 22.4 12.2 184
Kendall R.S. 7740 21.6 11.3 191 27.6 13.0 212
Loomis Park 8240 26.0 13.4 194 30.6 15.6 196
New Fork Lake 8340 15.9 9.3 171 16.8 9.7 173
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.1 11.1 163 25.5 12.8 199
Spring Creek Divide 9000 36.8 21.3 173 37.1 21.5 173
Triple Peak 8500 34.5 19.6 176 37.7 22.8 165
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Basin Index (%) 178 184
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.5 -M * 13.6 -M *
Buck Pasture 9632 16.4 -M * 20.7 -M *
EF Blacks Fork GS 9360 13.7 -M * 14.2 -M *
Hams Fork 7840 14.0 10.4 135 18.7 10.2 183
Hewinta 9500 7.1 10.0 71 14.3 12.4 115
Hickerson Park 9122 6.2 6.7 93 8.4 9.0 93
Hole-in-Rock 9168 4.7 6.7 70 9.1 8.4 108
Indian Creek 9425 37.0 21.5 172 -M 20.2 *
Kelley R.S. 8180 24.3 13.5 180 28.4 16.3 174
Spirit Lk 10235 12.2 -M * 14.7 -M *
Steel Creek Park 10158 15.2 13.5 113 17.1 14.4 119
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Basin Index (%) 132 136
UPPER BEAR RIVER
Bear River RS 8777 8.6 -M * 15.4 -M *
Bug Lake 7987 29.5 16.8 176 30.0 17.5 171
Burts Miller Ranch 8000 3.6 -M * 8.5 -M *
Chalk Creek #1 9171 30.6 21.4 143 32.0 22.3 143
Hayden Fork 9130 18.5 14.4 128 26.7 18.7 143
Kelley R.S. 8180 24.3 13.5 180 28.4 16.3 174
Lily Lake 9133 11.3 11.4 99 17.0 15.1 113
Monte Cristo 8932 32.4 24.6 132 34.7 23.3 149
Salt River Summit 7760 19.5 12.1 161 26.9 15.0 179
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Basin Index (%) 145 153
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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.