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 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 22.0 12.2 180 40.1 21.6 186
Black Bear 8170 47.6 36.8 129 55.7 39.5 141
Blind Bull Sum 8650 44.0 23.9 184 -M 20.1 *
Cottonwood Creek 7670 26.9 19.1 141 39.3 25.5 154
East Rim Divide 7930 12.9 9.6 134 21.3 12.1 176
Grand Targhee 9260 48.6 41.7 117 43.6 32.3 135
Granite Creek 6770 23.4 11.4 205 36.4 20.2 180
Grassy Lake 7265 37.1 31.5 118 56.4 37.1 152
Gros Ventre Summit 8750 20.2 13.2 153 24.9 13.5 184
Gunsight Pass 9820 23.6 13.5 175 25.7 14.6 176
Lewis Lake Divide 7850 46.0 30.2 152 56.8 36.5 156
Phillips Bench 8200 38.3 25.8 148 47.4 28.9 164
Salt River Summit 7760 18.4 10.3 179 29.7 17.2 173
Snake River Station 6920 15.8 11.7 135 36.5 23.3 157
Spring Creek Divide 9000 41.7 23.5 177 41.2 24.6 167
Thumb Divide 7980 21.3 14.5 147 28.8 19.5 148
Togwotee Pass 9580 33.8 23.5 144 39.5 25.4 156
Two Ocean Plateau 9240 -M 27.8 * -M 28.2 *
Willow Creek 8380 27.7 26.8 103 51.5 34.9 148
Younts Peak 8350 25.5 15.0 170 31.8 16.4 194
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Basin Index (%) 146 159
MADISON-GALLATIN
Black Bear 8170 47.6 36.8 129 55.7 39.5 141
Canyon 7870 17.7 12.4 143 26.4 16.8 157
Madison Plateau 7750 28.0 22.8 123 37.4 27.2 138
West Yellowstone 6700 3.8 8.0 48 23.9 14.9 160
Whiskey Creek 6800 13.2 15.1 87 27.8 21.0 132
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Basin Index (%) 116 143
YELLOWSTONE
Beartooth Lake 9360 33.5 23.0 146 28.8 20.5 140
Burnt Mtn 5880 .2 .0 * 15.0 13.9 108
Canyon 7870 17.7 12.4 143 26.4 16.8 157
Cole Creek 7850 12.0 16.0 75 9.5 14.2 67
Evening Star 9200 38.9 25.0 156 45.8 28.4 161
Fisher Creek 9100 44.4 32.2 138 48.6 33.0 147
Northeast Entrance 7350 4.8 7.3 66 21.0 12.8 164
Parker Peak 9400 37.2 20.8 179 35.5 18.5 192
Sylvan Lake 8420 24.4 20.3 120 38.3 23.3 164
Thumb Divide 7980 21.3 14.5 147 28.8 19.5 148
Two Ocean Plateau 9240 -M 27.8 * -M 28.2 *
White Mill 8700 37.5 23.6 159 37.0 24.7 150
Wolverine 7650 3.6 7.8 46 21.4 12.7 169
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Basin Index (%) 136 149
WIND RIVER
Burroughs Creek 8750 21.3 -M * 28.1 -M *
Castle Creek 8400 8.8 -M * 15.9 -M *
Cold Springs 9630 16.0 5.1 314 20.4 10.7 191
Deer Park 9700 32.5 16.1 202 38.6 21.1 183
Hobbs Park 10100 29.7 14.8 201 29.1 14.5 201
Kirwin 9550 22.5 10.0 225 26.0 12.2 213
Little Warm 9370 18.7 10.2 183 25.5 13.7 186
Owl Creek 8975 8.9 4.4 202 13.4 6.6 203
South Pass 9040 31.4 15.7 200 29.2 18.3 160
St. Lawrence Alt 8620 8.3 5.7 146 17.6 9.7 181
Togwotee Pass 9580 33.8 23.5 144 39.5 25.4 156
Townsend Creek 8700 17.5 9.7 180 23.7 13.0 182
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Basin Index (%) 190 181
BIGHORN BASIN
Bald Mtn. 9380 20.8 19.6 106 18.1 17.9 101
Bear Trap Meadow 8200 3.7 3.8 97 9.7 9.2 105
Bone Springs Div 9350 20.8 16.3 128 18.9 16.5 115
Grave Springs 8550 6.8 9.7 70 8.7 11.3 77
Kirwin 9550 22.5 10.0 225 26.0 12.2 213
Marquette 8760 14.2 -M * 18.1 -M *
Middle Powder 7760 8.4 12.5 67 8.6 12.5 69
Owl Creek 8975 8.9 4.4 202 13.4 6.6 203
Powder River Pass 9480 9.1 10.1 90 14.5 13.5 107
Shell Creek 9580 18.5 15.3 121 16.0 14.6 110
Timber Creek 7950 7.0 5.1 137 12.0 8.2 146
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Basin Index (%) 118 119
SHOSHONE RIVER
Blackwater 9780 38.9 23.8 163 43.2 21.6 200
Evening Star 9200 38.9 25.0 156 45.8 28.4 161
Marquette 8760 14.2 -M * 18.1 -M *
Sylvan Road 7120 1.7 10.2 17 31.2 17.4 179
Younts Peak 8350 25.5 15.0 170 31.8 16.4 194
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Basin Index (%) 142 181
POWDER RIVER
Bear Trap Meadow 8200 3.7 3.8 97 9.7 9.2 105
Cloud Peak Reservoir 9860 16.5 15.6 106 20.4 14.5 141
Grave Springs 8550 6.8 9.7 70 8.7 11.3 77
Hansen Sawmill 8360 11.1 5.2 213 15.7 9.3 169
Middle Powder 7760 8.4 12.5 67 8.6 12.5 69
Powder River Pass 9480 9.1 10.1 90 14.5 13.5 107
Soldier Park 8720 14.5 -M * 15.7 -M *
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Basin Index (%) 98 110
TONGUE RIVER
Big Goose 7990 11.9 9.5 125 15.3 12.3 124
Bone Springs Div 9350 20.8 16.3 128 18.9 16.5 115
Burgess Junction 7880 10.9 12.3 89 12.9 13.2 98
Dome Lake 8880 16.6 11.9 139 17.7 14.6 121
Little Goose 8870 14.3 -M * 18.8 -M *
Sucker Creek 8880 13.3 12.7 105 15.1 15.5 97
Tie Creek 6870 .4 4.5 9 14.5 12.6 115
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Basin Index (%) 110 111
BELLE FOURCHE
Cole Canyon 5910 .0 2.4 0 7.9 10.1 78
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Basin Index (%) 0 78
CHEYENNE RIVER BASIN
Blind Park 6890 .0 4.4 0 9.7 12.6 77
North Rapid Creek 6130 .0 4.6 0 8.2 10.5 78
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Basin Index (%) 0 77
UPPER N. PLATTE
Arapaho Ridge 10960 24.0 21.4 112 26.4 24.0 110
Blackhall Mtn 9820 34.5 -M * 38.2 -M *
Columbine 9160 12.3 21.0 59 27.8 26.6 105
Divide Peak 8880 11.8 19.3 61 23.3 22.5 104
Joe Wright 10120 15.9 22.1 72 28.8 27.4 105
Laprele Creek 8375 6.8 8.6 79 12.8 13.4 96
Med Bow 10500 34.9 -M * 35.7 -M *
North French Creek 10130 23.5 32.0 73 27.9 28.1 99
Never Summer 10280 21.9 20.6 106 19.6 -M *
Old Battle 10000 36.4 32.4 112 38.9 36.6 106
Rawah 9020 4.8 8.9 54 17.4 15.5 112
Sage Creek Basin 7850 -M 7.1 * 16.8 15.1 111
Sand Lake 10050 30.2 30.4 99 28.1 26.4 106
South Brush Creek 8440 -M 10.1 * 13.1 16.2 81
Tower 10500 37.5 47.7 79 44.2 41.6 106
Webber Springs 9250 23.3 22.6 103 33.8 28.1 120
Willow Creek Pass 9540 17.9 12.8 140 18.6 14.2 131
Zirkel 9340 -M 23.0 * 42.4 29.5 144
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Basin Index (%) 89 110
SWEETWATER
Deer Park 9700 32.5 16.1 202 38.6 21.1 183
Larsen Creek 9000 12.9 10.5 123 23.6 -M *
South Pass 9040 31.4 15.7 200 29.2 18.3 160
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Basin Index (%) 182 172
LOWER N. PLATTE
Casper Mtn. 7900 9.9 14.5 68 13.6 16.2 84
Laprele Creek 8375 6.8 8.6 79 12.8 13.4 96
Reno Hill 8400 11.8 14.0 84 15.3 16.8 91
Windy Peak 7900 4.7 6.9 68 12.0 11.4 105
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Basin Index (%) 75 93
LARAMIE RIVER
Brooklyn Lake 10240 20.6 22.1 93 23.6 22.4 105
Cinnabar Park 9574 13.3 20.5 65 22.6 25.2 90
Crow Creek 8330 .0 1.7 0 9.3 11.9 78
Deadman Hill 10220 20.3 16.6 122 20.9 18.6 112
Rawah 9020 4.8 8.9 54 17.4 15.5 112
Roach 9700 14.8 16.5 90 21.6 20.3 106
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Basin Index (%) 86 101
S. PLATTE
Black Mountain 8920 8.5 -M * 13.3 -M *
Crow Creek 8330 .0 1.7 0 9.3 11.9 78
Deadman Hill 10220 20.3 16.6 122 20.9 18.6 112
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Basin Index (%) 111 99
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 5.4 0 17.1 15.8 108
Divide Peak 8880 11.8 19.3 61 23.3 22.5 104
Elk River 8700 6.6 16.1 41 20.4 21.0 97
Little Snake River 8915 21.9 25.0 88 39.2 31.0 126
Old Battle 10000 36.4 32.4 112 38.9 36.6 106
Sage Creek Basin 7850 -M 7.1 * 16.8 15.1 111
Sandstone RS 8150 -M 10.8 * 16.2 19.2 84
Whiskey Park 8950 21.8 26.2 83 30.6 29.3 104
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Basin Index (%) 79 106
UPPER GREEN RIVER
Big Sandy Opening 9080 20.8 12.7 164 23.6 13.9 170
Blind Bull Sum 8650 44.0 23.9 184 -M 20.1 *
East Rim Divide 7930 12.9 9.6 134 21.3 12.1 176
Elkhart Park G.S. 9400 19.6 12.0 163 24.8 13.9 178
Gros Ventre Summit 8750 20.2 13.2 153 24.9 13.5 184
Gunsight Pass 9820 23.6 13.5 175 25.7 14.6 176
Kendall R.S. 7740 16.7 9.0 186 29.5 14.6 202
Loomis Park 8240 25.2 13.2 191 32.7 17.8 184
New Fork Lake 8340 13.3 9.2 145 18.5 11.2 165
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 16.5 11.1 149 28.0 14.6 192
Spring Creek Divide 9000 41.7 23.5 177 41.2 24.6 167
Triple Peak 8500 35.2 19.3 182 41.7 26.1 160
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Basin Index (%) 170 176
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.6 -M * 16.5 -M *
Buck Pasture 9632 15.6 -M * 24.2 -M *
EF Blacks Fork GS 9360 12.1 -M * 17.9 -M *
Hams Fork 7840 11.0 7.5 147 22.0 11.9 185
Hewinta 9500 6.7 8.7 77 17.9 14.8 121
Hickerson Park 9122 6.4 5.8 110 13.5 10.9 124
Hole-in-Rock 9168 5.6 6.2 90 14.0 10.4 135
Indian Creek 9425 40.3 23.3 173 41.8 23.3 179
Kelley R.S. 8180 24.1 13.1 184 31.2 18.7 167
Spirit Lk 10235 15.5 -M * 19.2 -M *
Steel Creek Park 10158 19.2 16.1 119 21.7 17.5 124
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Basin Index (%) 140 151
UPPER BEAR RIVER
Bear River RS 8777 3.4 -M * 19.1 -M *
Bug Lake 7987 31.7 18.0 176 34.8 20.1 173
Burts Miller Ranch 8000 .0 -M * 10.6 -M *
Chalk Creek #1 9171 32.0 24.8 129 37.1 26.4 141
Hayden Fork 9130 14.9 12.6 118 30.4 22.1 138
Kelley R.S. 8180 24.1 13.1 184 31.2 18.7 167
Lily Lake 9133 11.4 11.3 101 20.5 18.1 113
Monte Cristo 8932 36.0 27.6 130 40.5 27.0 150
Salt River Summit 7760 18.4 10.3 179 29.7 17.2 173
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Basin Index (%) 143 150
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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.