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 SATURDAY: MARCH 18 , 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 26.2 14.6 179 36.8 18.9 195
Black Bear 8170 43.0 32.2 134 48.8 34.2 143
Blind Bull Sum 8650 40.4 20.3 199 -M 17.5 *
Cottonwood Creek 7670 26.0 19.5 133 34.4 21.7 159
East Rim Divide 7930 18.4 9.5 194 19.8 10.5 189
Grand Targhee 9260 39.9 32.8 122 -M 26.8 *
Granite Creek 6770 29.6 15.0 197 34.2 18.0 190
Grassy Lake 7265 35.9 29.1 123 49.7 32.3 154
Gros Ventre Summit 8750 -M 11.4 * -M 11.3 *
Gunsight Pass 9820 19.8 11.9 166 22.1 12.0 184
Lewis Lake Divide 7850 38.5 27.5 140 50.2 31.8 158
Phillips Bench 8200 35.2 22.2 159 43.9 25.1 175
Salt River Summit 7760 20.3 11.9 171 -M 14.8 *
Snake River Station 6920 20.6 15.2 136 32.6 20.2 161
Spring Creek Divide 9000 36.6 20.7 177 37.0 21.2 175
Thumb Divide 7980 21.5 13.9 155 25.5 16.3 156
Togwotee Pass 9580 30.7 20.4 150 35.0 21.5 163
Two Ocean Plateau 9240 -M 23.8 * -M 24.1 *
Willow Creek 8380 30.0 25.3 119 45.1 29.6 152
Younts Peak 8350 27.1 13.2 205 29.1 14.0 208
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Basin Index (%) 152 166
MADISON-GALLATIN
Black Bear 8170 43.0 32.2 134 48.8 34.2 143
Canyon 7870 17.3 11.7 148 23.8 14.4 165
Madison Plateau 7750 25.3 20.0 126 32.7 23.4 140
West Yellowstone 6700 11.3 9.9 114 21.2 12.6 168
Whiskey Creek 6800 14.8 13.9 106 24.2 18.0 134
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Basin Index (%) 127 147
YELLOWSTONE
Beartooth Lake 9360 29.8 19.0 157 25.4 17.5 145
Burnt Mtn 5880 4.4 4.5 98 12.0 10.6 113
Canyon 7870 17.3 11.7 148 23.8 14.4 165
Cole Creek 7850 9.4 11.8 80 6.6 10.5 63
Evening Star 9200 35.6 21.9 163 41.1 24.2 170
Fisher Creek 9100 39.9 28.1 142 42.9 28.3 152
Northeast Entrance 7350 11.4 8.9 128 18.6 10.9 171
Parker Peak 9400 30.7 17.5 175 -M 15.5 *
Sylvan Lake 8420 22.5 17.9 126 34.0 19.7 173
Thumb Divide 7980 21.5 13.9 155 25.5 16.3 156
Two Ocean Plateau 9240 -M 23.8 * -M 24.1 *
White Mill 8700 31.7 19.7 161 32.6 21.0 155
Wolverine 7650 13.8 8.8 157 19.8 10.8 183
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Basin Index (%) 146 153
WIND RIVER
Burroughs Creek 8750 24.6 -M * 25.3 -M *
Castle Creek 8400 11.7 -M * 14.3 -M *
Cold Springs 9630 11.9 6.2 192 14.9 8.4 177
Deer Park 9700 27.5 12.8 215 32.1 16.9 190
Hobbs Park 10100 22.1 11.5 192 20.4 10.9 187
Kirwin 9550 18.3 8.3 220 21.0 9.8 214
Little Warm 9370 15.6 9.1 171 21.3 11.0 194
Owl Creek 8975 6.7 4.6 146 8.8 4.9 180
South Pass 9040 26.0 13.4 194 23.8 15.1 158
St. Lawrence Alt 8620 6.4 6.0 107 12.0 7.4 162
Togwotee Pass 9580 30.7 20.4 150 35.0 21.5 163
Townsend Creek 8700 12.1 8.0 151 15.9 9.9 161
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Basin Index (%) 177 177
BIGHORN BASIN
Bald Mtn. 9380 16.8 16.4 102 14.6 14.6 100
Bear Trap Meadow 8200 5.0 4.9 102 6.1 6.9 88
Bone Springs Div 9350 15.4 13.9 111 14.7 13.2 111
Grave Springs 8550 5.9 8.0 74 6.1 8.8 69
Kirwin 9550 18.3 8.3 220 21.0 9.8 214
Marquette 8760 7.2 -M * 11.8 -M *
Middle Powder 7760 6.4 9.5 67 6.2 9.8 63
Owl Creek 8975 6.7 4.6 146 8.8 4.9 180
Powder River Pass 9480 7.0 9.0 78 10.3 10.6 97
Shell Creek 9580 14.3 12.7 113 11.6 11.7 99
Timber Creek 7950 5.2 4.2 124 6.9 6.0 115
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Basin Index (%) 110 110
SHOSHONE RIVER
Blackwater 9780 34.7 20.5 169 38.5 17.9 215
Evening Star 9200 35.6 21.9 163 41.1 24.2 170
Marquette 8760 7.2 -M * 11.8 -M *
Sylvan Road 7120 14.6 10.3 142 28.4 15.0 189
Younts Peak 8350 27.1 13.2 205 29.1 14.0 208
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Basin Index (%) 170 193
POWDER RIVER
Bear Trap Meadow 8200 5.0 4.9 102 6.1 6.9 88
Cloud Peak Reservoir 9860 11.6 12.6 92 12.9 11.0 117
Grave Springs 8550 5.9 8.0 74 6.1 8.8 69
Hansen Sawmill 8360 7.2 5.5 131 9.3 7.0 133
Middle Powder 7760 6.4 9.5 67 6.2 9.8 63
Powder River Pass 9480 7.0 9.0 78 10.3 10.6 97
Soldier Park 8720 11.5 -M * 9.2 -M *
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Basin Index (%) 87 94
TONGUE RIVER
Big Goose 7990 8.2 7.6 108 9.4 8.9 106
Bone Springs Div 9350 15.4 13.9 111 14.7 13.2 111
Burgess Junction 7880 8.2 9.4 87 9.0 10.3 87
Dome Lake 8880 12.3 10.0 123 12.0 11.2 107
Little Goose 8870 9.0 -M * 11.6 -M *
Sucker Creek 8880 9.9 10.7 93 9.8 12.0 82
Tie Creek 6870 4.2 4.9 86 9.7 9.6 101
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Basin Index (%) 103 99
BELLE FOURCHE
Cole Canyon 5910 2.5 5.5 45 6.3 7.8 81
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Basin Index (%) 45 81
CHEYENNE RIVER BASIN
Blind Park 6890 3.6 7.2 50 7.8 10.4 75
North Rapid Creek 6130 4.4 6.4 69 6.4 8.5 75
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Basin Index (%) 59 75
UPPER N. PLATTE
Arapaho Ridge 10960 24.7 18.0 137 23.6 19.4 122
Blackhall Mtn 9820 34.5 -M * 34.9 -M *
Columbine 9160 23.5 21.8 108 25.9 22.6 115
Divide Peak 8880 17.8 17.4 102 21.0 18.8 112
Joe Wright 10120 17.7 18.9 94 25.6 22.5 114
Laprele Creek 8375 10.8 9.0 120 10.5 10.6 99
Med Bow 10500 36.7 -M * 32.4 -M *
North French Creek 10130 24.3 24.6 99 25.1 23.4 107
Never Summer 10280 21.4 17.6 122 17.2 -M *
Old Battle 10000 35.4 26.2 135 36.3 31.0 117
Rawah 9020 11.1 9.2 121 15.1 11.8 128
Sage Creek Basin 7850 12.2 11.6 105 15.2 12.9 118
Sand Lake 10050 28.1 24.2 116 25.5 21.3 120
South Brush Creek 8440 8.8 11.1 79 11.5 13.1 88
Tower 10500 39.3 39.5 99 41.7 35.3 118
Webber Springs 9250 27.5 20.9 132 31.5 23.5 134
Willow Creek Pass 9540 16.3 10.8 151 17.1 11.6 147
Zirkel 9340 38.9 25.8 151 40.2 25.1 160
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Basin Index (%) 117 121
SWEETWATER
Deer Park 9700 27.5 12.8 215 32.1 16.9 190
Larsen Creek 9000 17.6 11.0 160 21.0 -M *
South Pass 9040 26.0 13.4 194 23.8 15.1 158
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Basin Index (%) 191 175
LOWER N. PLATTE
Casper Mtn. 7900 10.8 12.0 90 10.4 12.5 83
Laprele Creek 8375 10.8 9.0 120 10.5 10.6 99
Reno Hill 8400 11.0 11.8 93 11.7 12.7 92
Windy Peak 7900 9.4 6.9 136 10.0 8.9 112
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Basin Index (%) 106 95
LARAMIE RIVER
Brooklyn Lake 10240 24.2 17.5 138 21.7 18.1 120
Cinnabar Park 9574 18.1 17.8 102 20.8 21.1 99
Crow Creek 8330 4.5 7.0 64 8.2 8.7 94
Deadman Hill 10220 19.6 13.7 143 18.2 14.7 124
Rawah 9020 11.1 9.2 121 15.1 11.8 128
Roach 9700 15.2 13.8 110 18.4 16.6 111
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Basin Index (%) 117 113
S. PLATTE
Black Mountain 8920 9.3 -M * 10.5 -M *
Crow Creek 8330 4.5 7.0 64 8.2 8.7 94
Deadman Hill 10220 19.6 13.7 143 18.2 14.7 124
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Basin Index (%) 116 113
LITTLE SNAKE RIVER
Battle Mountain 7440 8.1 11.2 72 15.6 13.4 116
Divide Peak 8880 17.8 17.4 102 21.0 18.8 112
Elk River 8700 18.0 17.3 104 19.1 17.7 108
Little Snake River 8915 29.3 20.8 141 36.7 26.2 140
Old Battle 10000 35.4 26.2 135 36.3 31.0 117
Sage Creek Basin 7850 12.2 11.6 105 15.2 12.9 118
Sandstone RS 8150 11.5 11.8 97 15.3 16.5 93
Whiskey Park 8950 26.4 24.1 110 28.3 24.7 115
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Basin Index (%) 113 116
UPPER GREEN RIVER
Big Sandy Opening 9080 19.9 11.4 175 21.6 11.6 186
Blind Bull Sum 8650 40.4 20.3 199 -M 17.5 *
East Rim Divide 7930 18.4 9.5 194 19.8 10.5 189
Elkhart Park G.S. 9400 17.8 10.5 170 22.1 11.7 189
Gros Ventre Summit 8750 -M 11.4 * -M 11.3 *
Gunsight Pass 9820 19.8 11.9 166 22.1 12.0 184
Kendall R.S. 7740 22.5 11.1 203 27.5 12.8 215
Loomis Park 8240 26.8 13.2 203 30.5 15.4 198
New Fork Lake 8340 16.0 9.2 174 16.6 9.6 173
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 18.7 10.9 172 25.5 12.7 201
Spring Creek Divide 9000 36.6 20.7 177 37.0 21.2 175
Triple Peak 8500 35.0 19.2 182 37.6 22.5 167
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Basin Index (%) 184 186
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.4 -M * 13.6 -M *
Buck Pasture 9632 17.6 -M * 20.7 -M *
EF Blacks Fork GS 9360 15.1 -M * -M -M *
Hams Fork 7840 15.8 10.2 155 18.4 10.0 184
Hewinta 9500 8.7 9.6 91 14.1 12.2 116
Hickerson Park 9122 6.9 6.6 105 8.4 8.7 97
Hole-in-Rock 9168 5.7 6.5 88 9.1 8.2 111
Indian Creek 9425 37.0 21.0 176 -M 19.8 *
Kelley R.S. 8180 24.9 13.2 189 28.4 16.0 178
Spirit Lk 10235 13.0 -M * 14.7 -M *
Steel Creek Park 10158 15.2 13.3 114 17.1 14.1 121
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Basin Index (%) 142 138
UPPER BEAR RIVER
Bear River RS 8777 10.1 -M * 15.4 -M *
Bug Lake 7987 29.7 16.5 180 30.0 17.2 174
Burts Miller Ranch 8000 5.4 -M * 8.4 -M *
Chalk Creek #1 9171 30.9 20.8 149 32.1 21.9 147
Hayden Fork 9130 20.6 14.2 145 26.7 18.3 146
Kelley R.S. 8180 24.9 13.2 189 28.4 16.0 178
Lily Lake 9133 12.9 11.4 113 16.9 14.8 114
Monte Cristo 8932 33.6 24.1 139 34.7 22.8 152
Salt River Summit 7760 20.3 11.9 171 -M 14.8 *
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Basin Index (%) 154 152
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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.