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 THURSDAY: APRIL 12 , 2018
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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 7060 18.9 14.4 131 23.5 21.1 111
Black Bear 8170 42.5 36.7 116 43.2 38.5 112
Blind Bull Sum 8650 36.6 23.6 155 21.7 19.6 111
Cottonwood Creek 7670 23.5 20.5 115 27.9 24.9 112
East Rim Divide 7930 12.6 10.1 125 13.3 11.8 113
Grand Targhee 9260 50.4 40.0 126 30.7 31.3 98
Granite Creek 6770 18.4 13.3 138 23.5 19.7 119
Grassy Lake 7265 33.8 31.4 108 37.8 36.2 104
Gros Ventre Summit 8750 17.5 12.8 137 16.6 13.1 127
Gunsight Pass 9820 19.0 13.7 139 18.0 14.1 128
Lewis Lake Divide 7850 43.8 30.2 145 42.2 35.7 118
Phillips Bench 8200 31.7 25.9 122 30.6 28.4 108
Salt River Summit 7640 10.4 12.1 86 13.9 16.8 83
Snake River Station 6920 18.3 13.9 132 25.3 22.7 111
Spring Creek Divide 9000 28.2 22.9 123 26.3 24.0 110
Thumb Divide 7980 21.0 14.6 144 20.6 18.8 110
Togwotee Pass 9580 35.2 22.7 155 32.9 24.6 134
Two Ocean Plateau 9240 40.7 26.7 152 30.7 27.5 112
Willow Creek 8080 37.4 27.5 136 38.1 34.0 112
Younts Peak 8350 -M 14.5 * -M 16.0 *
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Basin Index (%) 131 112
MADISON-GALLATIN
Black Bear 8170 42.5 36.7 116 43.2 38.5 112
Canyon 7870 17.9 12.3 146 20.6 16.4 126
Madison Plateau 7750 28.0 22.2 126 28.5 26.5 108
West Yellowstone 6700 12.0 8.6 140 17.8 14.2 125
Whiskey Creek 6800 16.4 14.6 112 19.8 20.3 98
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Basin Index (%) 124 112
YELLOWSTONE
Beartooth Lake 9360 -M 21.8 * 38.1 20.0 190
Burnt Mtn 5880 7.7 2.4 321 15.5 13.3 117
Canyon 7870 17.9 12.3 146 20.6 16.4 126
Cole Creek 7850 15.8 15.3 103 -M 13.5 *
Evening Star 9200 44.9 24.2 186 42.3 27.7 153
Fisher Creek 9100 55.9 31.6 177 49.7 32.0 155
Northeast Entrance 7350 15.8 8.5 186 19.5 12.4 157
Parker Peak 9400 36.6 20.1 182 30.2 17.9 169
Sylvan Lake 8420 27.8 19.8 140 29.6 22.6 131
Thumb Divide 7980 21.0 14.6 144 20.6 18.8 110
Two Ocean Plateau 9240 40.7 26.7 152 30.7 27.5 112
White Mill 8700 44.6 23.1 193 34.4 24.0 143
Wolverine 7650 24.0 9.2 261 22.8 12.3 185
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Basin Index (%) 170 145
WIND RIVER
Burroughs Creek 8750 17.7 -M * 19.1 -M *
Castle Creek 8400 8.7 -M * 10.5 -M *
Cold Springs 9630 10.1 6.1 166 10.5 10.3 102
Deer Park 9700 13.0 16.2 80 16.3 20.5 80
Hobbs Park 10100 18.6 14.8 126 15.9 14.0 114
Kirwin 9550 21.1 9.8 215 19.0 11.8 161
Little Warm 9370 17.8 10.3 173 18.4 13.1 140
Owl Creek 8975 4.3 5.6 77 6.4 6.3 102
South Pass 9040 12.3 15.8 78 -M 17.8 *
St. Lawrence Alt 8620 -M 6.8 * 8.7 9.3 94
Togwotee Pass 9580 35.2 22.7 155 32.9 24.6 134
Townsend Creek 8700 7.4 10.0 74 9.7 12.6 77
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Basin Index (%) 126 112
BIGHORN BASIN
Bald Mtn. 9380 23.0 19.3 119 17.1 17.4 98
Bear Trap Meadow 8200 -M 4.6 * 11.7 8.8 133
Bone Springs Div 9350 21.2 17.0 125 16.4 15.9 103
Grave Springs 8550 8.3 9.6 86 -M 11.0 *
Kirwin 9550 21.1 9.8 215 19.0 11.8 161
Marquette 8760 6.9 -M * 10.5 -M *
Middle Powder 7760 10.4 12.4 84 -M 12.1 *
Owl Creek 8975 4.3 5.6 77 6.4 6.3 102
Powder River Pass 9480 17.0 10.3 165 16.7 13.0 128
Shell Creek 9580 22.7 15.6 146 17.2 14.1 122
Timber Creek 7950 3.1 5.1 61 -M 7.6 *
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Basin Index (%) 125 120
SHOSHONE RIVER
Blackwater 9780 37.1 23.3 159 -M 20.9 *
Evening Star 9200 44.9 24.2 186 42.3 27.7 153
Marquette 8760 6.9 -M * 10.5 -M *
Sylvan Road 7120 15.6 10.4 150 23.7 16.9 140
Younts Peak 8350 -M 14.5 * -M 16.0 *
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Basin Index (%) 169 148*
POWDER RIVER
Bear Trap Meadow 8200 -M 4.6 * 11.7 8.8 133
Cloud Peak Reservoir 9860 17.2 15.3 112 15.7 13.8 114
Grave Springs 8550 8.3 9.6 86 -M 11.0 *
Hansen Sawmill 8360 9.6 6.1 157 11.6 8.9 130
Middle Powder 7760 10.4 12.4 84 -M 12.1 *
Powder River Pass 9480 17.0 10.3 165 16.7 13.0 128
Soldier Park 8720 8.7 -M * 11.1 -M *
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Basin Index (%) 116 125
TONGUE RIVER
Big Goose 7990 9.3 9.9 94 10.0 12.0 83
Bone Springs Div 9350 21.2 17.0 125 16.4 15.9 103
Burgess Junction 7880 11.3 12.2 93 9.7 12.8 76
Dome Lake 8880 16.6 11.9 139 13.6 14.1 96
Little Goose 8870 11.2 -M * 13.5 -M *
Sucker Creek 8880 12.5 12.5 100 10.4 14.9 70
Tie Creek 6870 5.9 5.2 113 10.5 12.1 87
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Basin Index (%) 112 86
BELLE FOURCHE
Cole Canyon 5910 7.6 4.1 185 11.1 9.8 113
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Basin Index (%) 185 113
CHEYENNE RIVER BASIN
Blind Park 6890 8.6 6.2 139 12.5 12.3 102
North Rapid Creek 6130 7.3 6.0 122 9.9 10.3 96
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Basin Index (%) 130 99
UPPER N. PLATTE
Arapaho Ridge 10960 22.5 21.4 105 22.1 23.4 94
Blackhall Mtn 9820 30.1 -M * 28.9 -M *
Columbine 9160 25.9 22.8 114 27.3 26.0 105
Divide Peak 8880 15.2 20.3 75 19.0 21.9 87
Joe Wright 10120 22.2 21.9 101 31.8 26.5 120
Laprele Creek 8375 6.9 9.4 73 8.9 12.9 69
Med Bow 10500 43.7 -M * 31.2 -M *
North French Creek 10130 31.0 31.0 100 29.7 27.4 108
Never Summer 10280 21.4 20.5 104 17.5 -M *
Old Battle 10000 27.3 32.0 85 25.8 35.6 72
Rawah 9020 11.6 10.2 114 16.1 14.9 108
Sage Creek Basin 7850 6.0 10.3 58 11.1 14.9 74
Sand Lake 10050 29.5 30.0 98 25.1 25.5 98
South Brush Creek 8440 10.8 11.5 94 13.0 15.7 83
Tower 10500 41.7 47.1 89 -M 40.5 *
Webber Springs 9250 19.1 23.4 82 22.7 27.3 83
Willow Creek Pass 9540 14.2 12.5 114 15.1 13.8 109
Zirkel 9340 27.8 25.1 111 33.3 29.1 114
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Basin Index (%) 95 96
SWEETWATER
Deer Park 9700 13.0 16.2 80 16.3 20.5 80
Larsen Creek 9000 11.6 11.1 105 12.0 -M *
South Pass 9040 12.3 15.8 78 -M 17.8 *
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Basin Index (%) 86 80*
LOWER N. PLATTE
Casper Mtn. 7900 8.5 14.5 59 7.3 15.6 47
Laprele Creek 8375 6.9 9.4 73 8.9 12.9 69
Reno Hill 8400 10.5 14.2 74 12.4 16.1 77
Windy Peak 7900 6.8 7.5 91 9.2 10.9 84
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Basin Index (%) 72 68
LARAMIE RIVER
Brooklyn Lake 10240 27.2 22.3 122 27.0 21.7 124
Cinnabar Park 9574 22.7 21.4 106 26.1 24.8 105
Crow Creek 8330 4.1 5.9 69 11.8 11.3 104
Deadman Hill 10220 21.9 16.6 132 20.7 17.9 116
Rawah 9020 11.6 10.2 114 16.1 14.9 108
Roach 9700 14.2 16.5 86 18.1 19.7 92
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Basin Index (%) 109 109
S. PLATTE
Black Mountain 8920 10.7 -M * 14.2 -M *
Crow Creek 8330 4.1 5.9 69 11.8 11.3 104
Deadman Hill 10220 21.9 16.6 132 20.7 17.9 116
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Basin Index (%) 116 111
LITTLE SNAKE RIVER
Battle Mountain 7440 4.6 8.0 58 11.9 15.3 78
Divide Peak 8880 15.2 20.3 75 19.0 21.9 87
Elk River 8700 15.6 18.2 86 18.0 20.5 88
Little Snake River 8915 22.5 26.0 87 29.8 30.6 97
Old Battle 10000 27.3 32.0 85 25.8 35.6 72
Sage Creek Basin 7850 6.0 10.3 58 11.1 14.9 74
Sandstone RS 8150 8.8 12.5 70 10.3 18.7 55
Whiskey Park 8950 26.3 27.6 95 27.4 28.4 96
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Basin Index (%) 82 82
UPPER GREEN RIVER
Big Sandy Opening 9080 13.9 12.9 108 13.8 13.5 102
Blind Bull Sum 8650 36.6 23.6 155 21.7 19.6 111
East Rim Divide 7930 12.6 10.1 125 13.3 11.8 113
Elkhart Park G.S. 9400 13.5 12.3 110 12.7 13.5 94
Gros Ventre Summit 8750 17.5 12.8 137 16.6 13.1 127
Gunsight Pass 9820 19.0 13.7 139 18.0 14.1 128
Kendall R.S. 7740 14.9 10.7 139 16.9 14.3 118
Loomis Park 8240 19.1 13.7 139 19.9 17.4 114
New Fork Lake 8340 12.0 9.9 121 12.3 10.9 113
Pocket Creek 9360 9.7 -M * 9.8 -M *
Snider Basin 8060 11.7 12.2 96 15.5 14.3 108
Spring Creek Divide 9000 28.2 22.9 123 26.3 24.0 110
Triple Peak 8500 34.7 20.7 168 33.9 25.5 133
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Basin Index (%) 133 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.9 -M * 9.4 -M *
Buck Pasture 9632 11.3 -M * 13.9 -M *
EF Blacks Fork GS 9360 9.4 -M * -M -M *
Hams Fork 7840 8.5 9.5 89 10.1 11.5 88
Hewinta 9500 6.6 10.5 63 11.8 14.4 82
Hickerson Park 9122 4.8 7.5 64 8.1 10.6 76
Hole-in-Rock 9168 6.1 7.1 86 8.8 10.1 87
Indian Creek 9425 24.0 24.6 98 17.2 22.8 75
Kelley R.S. 8180 14.0 14.2 99 15.5 18.3 85
Spirit Lk 10235 10.0 -M * 12.4 -M *
Steel Creek Park 10158 13.4 16.1 83 14.6 17.0 86
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Basin Index (%) 86 82
UPPER BEAR RIVER
Bear River RS 8777 3.0 -M * 10.8 -M *
Bug Lake 7987 13.7 19.1 72 17.0 19.7 86
Burts Miller Ranch 8000 .1 -M * 6.4 -M *
Chalk Creek #1 9171 14.4 24.7 58 16.9 25.8 66
Hayden Fork 9130 9.1 14.7 62 17.0 21.5 79
Kelley R.S. 8180 14.0 14.2 99 15.5 18.3 85
Lily Lake 9133 8.4 12.7 66 12.3 17.6 70
Monte Cristo 8932 22.8 27.8 82 23.1 26.5 87
Salt River Summit 7640 10.4 12.1 86 13.9 16.8 83
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Basin Index (%) 74 79
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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.