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: MARCH 31 , 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 23.9 14.7 163 38.6 20.1 192
Black Bear 8170 44.8 36.0 124 52.0 36.4 143
Blind Bull Sum 8650 42.2 22.2 190 -M 18.7 *
Cottonwood Creek 7670 26.6 21.1 126 36.5 23.5 155
East Rim Divide 7930 17.1 9.9 173 20.7 11.3 183
Grand Targhee 9260 43.4 36.1 120 38.9 29.1 134
Granite Creek 6770 27.4 14.9 184 35.3 19.0 186
Grassy Lake 7265 35.7 31.5 113 52.6 34.5 152
Gros Ventre Summit 8750 19.5 12.8 152 23.3 12.3 189
Gunsight Pass 9820 21.0 13.3 158 23.4 13.1 179
Lewis Lake Divide 7850 43.9 29.4 149 54.1 34.0 159
Phillips Bench 8200 36.5 24.0 152 45.3 27.0 168
Salt River Summit 7760 19.8 12.8 155 -M 15.9 *
Snake River Station 6920 18.8 15.6 121 34.6 21.6 160
Spring Creek Divide 9000 39.3 22.5 175 39.0 22.8 171
Thumb Divide 7980 22.9 14.9 154 27.2 17.7 154
Togwotee Pass 9580 32.3 21.6 150 37.0 23.2 159
Two Ocean Plateau 9240 -M 25.5 * -M 26.1 *
Willow Creek 8380 28.6 27.6 104 47.3 32.0 148
Younts Peak 8350 25.3 14.1 179 30.3 15.1 201
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Basin Index (%) 144 162
MADISON-GALLATIN
Black Bear 8170 44.8 36.0 124 52.0 36.4 143
Canyon 7870 17.2 12.3 140 24.9 15.5 161
Madison Plateau 7750 26.3 21.2 124 35.0 25.1 139
West Yellowstone 6700 8.3 10.2 81 22.4 13.5 166
Whiskey Creek 6800 13.5 14.9 91 25.9 19.3 134
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Basin Index (%) 116 146
YELLOWSTONE
Beartooth Lake 9360 31.4 20.9 150 26.7 18.8 142
Burnt Mtn 5880 .0 4.4 0 13.3 12.0 111
Canyon 7870 17.2 12.3 140 24.9 15.5 161
Cole Creek 7850 10.5 13.4 78 7.3 11.9 61
Evening Star 9200 37.2 23.9 156 43.6 26.0 168
Fisher Creek 9100 42.8 29.9 143 46.0 30.3 152
Northeast Entrance 7350 9.5 9.7 98 20.0 11.6 172
Parker Peak 9400 33.0 18.7 176 33.1 16.8 197
Sylvan Lake 8420 23.0 19.1 120 36.0 21.2 170
Thumb Divide 7980 22.9 14.9 154 27.2 17.7 154
Two Ocean Plateau 9240 -M 25.5 * -M 26.1 *
White Mill 8700 34.9 21.5 162 35.1 22.6 155
Wolverine 7650 7.6 9.0 84 20.5 11.6 177
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Basin Index (%) 137 154
WIND RIVER
Burroughs Creek 8750 23.5 -M * 26.5 -M *
Castle Creek 8400 10.7 -M * 14.9 -M *
Cold Springs 9630 14.0 7.1 197 16.6 9.4 177
Deer Park 9700 30.2 14.6 207 35.3 18.5 191
Hobbs Park 10100 25.5 13.2 193 23.9 12.4 193
Kirwin 9550 20.9 9.4 222 22.9 11.0 208
Little Warm 9370 17.5 10.2 172 23.0 12.2 189
Owl Creek 8975 8.5 5.3 160 10.8 5.6 193
South Pass 9040 28.8 14.8 195 25.9 16.5 157
St. Lawrence Alt 8620 7.4 6.7 110 14.6 8.5 172
Togwotee Pass 9580 32.3 21.6 150 37.0 23.2 159
Townsend Creek 8700 15.2 8.9 171 19.1 11.2 171
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Basin Index (%) 179 178
BIGHORN BASIN
Bald Mtn. 9380 18.5 18.4 101 15.9 16.2 98
Bear Trap Meadow 8200 4.3 5.1 84 7.4 8.0 92
Bone Springs Div 9350 18.3 15.6 117 16.9 14.7 115
Grave Springs 8550 6.3 8.8 72 6.9 9.9 70
Kirwin 9550 20.9 9.4 222 22.9 11.0 208
Marquette 8760 9.6 -M * 13.7 -M *
Middle Powder 7760 6.8 11.2 61 6.9 11.1 62
Owl Creek 8975 8.5 5.3 160 10.8 5.6 193
Powder River Pass 9480 8.0 9.9 81 11.8 11.9 99
Shell Creek 9580 16.3 14.4 113 13.4 13.1 102
Timber Creek 7950 6.0 4.7 128 9.3 6.9 135
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Basin Index (%) 111 113
SHOSHONE RIVER
Blackwater 9780 36.8 22.0 167 40.7 19.5 209
Evening Star 9200 37.2 23.9 156 43.6 26.0 168
Marquette 8760 9.6 -M * 13.7 -M *
Sylvan Road 7120 9.3 11.1 84 29.9 16.0 187
Younts Peak 8350 25.3 14.1 179 30.3 15.1 201
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Basin Index (%) 153 189
POWDER RIVER
Bear Trap Meadow 8200 4.3 5.1 84 7.4 8.0 92
Cloud Peak Reservoir 9860 14.3 14.0 102 15.8 12.5 126
Grave Springs 8550 6.3 8.8 72 6.9 9.9 70
Hansen Sawmill 8360 9.9 6.3 157 12.4 8.0 155
Middle Powder 7760 6.8 11.2 61 6.9 11.1 62
Powder River Pass 9480 8.0 9.9 81 11.8 11.9 99
Soldier Park 8720 13.6 -M * 12.3 -M *
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Basin Index (%) 90 100
TONGUE RIVER
Big Goose 7990 10.4 8.7 120 12.0 10.5 114
Bone Springs Div 9350 18.3 15.6 117 16.9 14.7 115
Burgess Junction 7880 9.7 11.2 87 10.7 11.6 92
Dome Lake 8880 14.8 11.4 130 14.7 12.8 115
Little Goose 8870 11.5 -M * 14.7 -M *
Sucker Creek 8880 11.7 11.4 103 11.7 13.5 87
Tie Creek 6870 3.2 5.4 59 12.1 10.8 112
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Basin Index (%) 107 106
BELLE FOURCHE
Cole Canyon 5910 .0 5.8 0 7.1 8.7 82
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Basin Index (%) 0 82
CHEYENNE RIVER BASIN
Blind Park 6890 .0 7.2 0 8.3 11.2 74
North Rapid Creek 6130 .8 6.7 12 7.0 9.2 76
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Basin Index (%) 6 75
UPPER N. PLATTE
Arapaho Ridge 10960 24.2 19.6 123 25.1 21.1 119
Blackhall Mtn 9820 35.4 -M * 36.4 -M *
Columbine 9160 19.4 22.6 86 26.6 24.3 109
Divide Peak 8880 15.6 19.4 80 21.6 20.4 106
Joe Wright 10120 17.8 20.1 89 27.1 24.5 111
Laprele Creek 8375 10.2 9.4 109 11.3 11.7 97
Med Bow 10500 37.0 -M * 33.9 -M *
North French Creek 10130 23.7 27.8 85 26.3 25.5 103
Never Summer 10280 21.1 19.4 109 18.2 -M *
Old Battle 10000 35.6 29.2 122 37.2 33.4 111
Rawah 9020 9.4 10.3 91 16.3 13.5 121
Sage Creek Basin 7850 7.0 12.6 56 15.7 13.7 115
Sand Lake 10050 29.8 27.3 109 26.6 23.4 114
South Brush Creek 8440 5.6 12.2 46 12.1 14.5 83
Tower 10500 39.3 43.6 90 42.3 37.9 112
Webber Springs 9250 25.5 22.8 112 32.4 25.4 128
Willow Creek Pass 9540 17.1 11.7 146 17.8 12.7 140
Zirkel 9340 33.3 26.3 127 40.9 27.1 151
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Basin Index (%) 100 115
SWEETWATER
Deer Park 9700 30.2 14.6 207 35.3 18.5 191
Larsen Creek 9000 17.0 12.1 140 22.6 -M *
South Pass 9040 28.8 14.8 195 25.9 16.5 157
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Basin Index (%) 183 175
LOWER N. PLATTE
Casper Mtn. 7900 9.8 13.2 74 11.2 13.9 81
Laprele Creek 8375 10.2 9.4 109 11.3 11.7 97
Reno Hill 8400 11.6 13.0 89 13.0 14.4 90
Windy Peak 7900 8.1 7.8 104 10.9 10.0 109
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Basin Index (%) 91 93
LARAMIE RIVER
Brooklyn Lake 10240 22.4 19.7 114 22.2 20.0 111
Cinnabar Park 9574 17.0 19.8 86 21.5 22.9 94
Crow Creek 8330 .2 6.7 3 8.8 10.1 87
Deadman Hill 10220 20.1 15.4 131 19.5 16.3 120
Rawah 9020 9.4 10.3 91 16.3 13.5 121
Roach 9700 16.2 15.4 105 20.3 18.2 112
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Basin Index (%) 98 108
S. PLATTE
Black Mountain 8920 10.5 -M * 12.2 -M *
Crow Creek 8330 .2 6.7 3 8.8 10.1 87
Deadman Hill 10220 20.1 15.4 131 19.5 16.3 120
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Basin Index (%) 92 107
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 10.7 * 16.1 14.4 112
Divide Peak 8880 15.6 19.4 80 21.6 20.4 106
Elk River 8700 12.7 18.3 69 19.3 19.1 101
Little Snake River 8915 26.6 22.9 116 37.7 28.2 134
Old Battle 10000 35.6 29.2 122 37.2 33.4 111
Sage Creek Basin 7850 7.0 12.6 56 15.7 13.7 115
Sandstone RS 8150 7.6 13.1 58 15.9 17.6 90
Whiskey Park 8950 25.5 25.5 100 29.1 26.7 109
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Basin Index (%) 93 111
UPPER GREEN RIVER
Big Sandy Opening 9080 20.7 12.3 168 22.9 12.6 182
Blind Bull Sum 8650 42.2 22.2 190 -M 18.7 *
East Rim Divide 7930 17.1 9.9 173 20.7 11.3 183
Elkhart Park G.S. 9400 18.8 12.0 157 23.7 12.7 187
Gros Ventre Summit 8750 19.5 12.8 152 23.3 12.3 189
Gunsight Pass 9820 21.0 13.3 158 23.4 13.1 179
Kendall R.S. 7740 20.7 11.4 182 28.6 13.7 209
Loomis Park 8240 26.6 14.4 185 31.6 16.6 190
New Fork Lake 8340 15.6 10.3 151 17.4 10.3 169
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.6 12.1 154 26.4 13.6 194
Spring Creek Divide 9000 39.3 22.5 175 39.0 22.8 171
Triple Peak 8500 35.5 21.5 165 39.6 24.3 163
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Basin Index (%) 169 182
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.1 -M * 15.5 -M *
Buck Pasture 9632 17.5 -M * 22.9 -M *
EF Blacks Fork GS 9360 15.1 -M * 16.6 -M *
Hams Fork 7840 13.9 10.8 129 20.7 10.9 190
Hewinta 9500 8.5 10.8 79 16.8 13.3 126
Hickerson Park 9122 8.6 7.4 116 11.9 9.6 124
Hole-in-Rock 9168 6.9 7.0 99 12.7 9.1 140
Indian Creek 9425 39.4 23.7 166 -M 21.6 *
Kelley R.S. 8180 25.0 14.8 169 29.8 17.3 172
Spirit Lk 10235 15.4 -M * 17.7 -M *
Steel Creek Park 10158 18.2 15.1 121 20.2 15.5 130
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Basin Index (%) 134 148
UPPER BEAR RIVER
Bear River RS 8777 9.8 -M * 18.2 -M *
Bug Lake 7987 30.8 18.0 171 32.6 18.5 176
Burts Miller Ranch 8000 3.6 -M * 10.0 -M *
Chalk Creek #1 9171 33.4 23.2 144 34.6 24.0 144
Hayden Fork 9130 19.9 15.0 133 29.4 20.0 147
Kelley R.S. 8180 25.0 14.8 169 29.8 17.3 172
Lily Lake 9133 14.0 12.0 117 19.8 16.2 122
Monte Cristo 8932 34.3 26.0 132 37.3 24.8 150
Salt River Summit 7760 19.8 12.8 155 -M 15.9 *
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Basin Index (%) 145 152
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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.