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: APRIL 6 , 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 18.3 15.2 120 21.4 20.5 104
Black Bear 8170 43.3 37.2 116 41.6 37.6 111
Blind Bull Sum 8650 34.1 23.1 148 20.6 19.2 107
Cottonwood Creek 7670 22.4 21.0 107 25.7 24.3 106
East Rim Divide 7930 12.9 10.2 126 12.7 11.6 109
Grand Targhee 9260 46.0 38.2 120 29.1 30.4 96
Granite Creek 6770 18.9 14.6 129 21.8 19.4 112
Grassy Lake 7265 32.9 31.5 104 35.3 35.3 100
Gros Ventre Summit 8750 16.6 12.9 129 15.6 12.7 123
Gunsight Pass 9820 17.7 13.7 129 16.9 13.6 124
Lewis Lake Divide 7850 40.9 29.8 137 38.7 34.8 111
Phillips Bench 8200 29.2 25.2 116 28.5 27.7 103
Salt River Summit 7640 11.3 12.9 88 13.0 16.4 79
Snake River Station 6920 19.0 14.9 128 23.7 22.1 107
Spring Creek Divide 9000 26.8 22.5 119 24.9 23.5 106
Thumb Divide 7980 20.4 14.7 139 19.6 18.3 107
Togwotee Pass 9580 32.6 22.0 148 32.6 23.9 136
Two Ocean Plateau 9240 38.2 25.9 147 29.7 26.6 112
Willow Creek 8080 34.3 28.4 121 35.5 33.0 108
Younts Peak 8350 -M 14.3 * -M 15.5 *
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Basin Index (%) 125 108
MADISON-GALLATIN
Black Bear 8170 43.3 37.2 116 41.6 37.6 111
Canyon 7870 17.1 12.5 137 19.7 16.0 123
Madison Plateau 7750 26.8 21.4 125 27.5 25.9 106
West Yellowstone 6700 13.0 9.7 134 17.4 14.0 124
Whiskey Creek 6800 16.9 14.9 113 18.9 19.8 95
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Basin Index (%) 122 110
YELLOWSTONE
Beartooth Lake 9360 39.9 21.2 188 -M 19.4 *
Burnt Mtn 5880 8.0 4.6 174 14.9 12.8 116
Canyon 7870 17.1 12.5 137 19.7 16.0 123
Cole Creek 7850 15.1 14.4 105 -M 12.7 *
Evening Star 9200 42.6 23.7 180 42.1 26.8 157
Fisher Creek 9100 53.1 31.1 171 47.1 31.1 151
Northeast Entrance 7350 14.1 9.1 155 18.5 12.0 154
Parker Peak 9400 34.9 19.3 181 29.5 17.3 171
Sylvan Lake 8420 26.4 19.3 137 28.1 21.8 129
Thumb Divide 7980 20.4 14.7 139 19.6 18.3 107
Two Ocean Plateau 9240 38.2 25.9 147 29.7 26.6 112
White Mill 8700 42.0 22.1 190 32.4 23.2 140
Wolverine 7650 22.7 9.5 239 21.4 12.0 178
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Basin Index (%) 165 139
WIND RIVER
Burroughs Creek 8750 16.1 -M * 17.9 -M *
Castle Creek 8400 8.3 -M * 10.0 -M *
Cold Springs 9630 9.9 6.8 146 10.2 9.8 104
Deer Park 9700 12.7 15.4 82 15.6 19.6 80
Hobbs Park 10100 17.9 14.0 128 15.4 13.2 117
Kirwin 9550 20.3 9.6 211 18.2 11.4 160
Little Warm 9370 16.6 10.2 163 17.3 12.6 137
Owl Creek 8975 4.4 5.8 76 6.3 5.9 107
South Pass 9040 12.0 15.1 79 8.7 17.1 51
St. Lawrence Alt 8620 2.7 6.8 40 8.6 8.9 97
Togwotee Pass 9580 32.6 22.0 148 32.6 23.9 136
Townsend Creek 8700 7.3 9.5 77 9.5 11.9 80
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Basin Index (%) 118 106
BIGHORN BASIN
Bald Mtn. 9380 21.9 19.0 115 16.0 16.7 96
Bear Trap Meadow 8200 -M 5.0 * 11.2 8.4 133
Bone Springs Div 9350 20.3 16.7 122 15.6 15.3 102
Grave Springs 8550 7.9 9.3 85 -M 10.4 *
Kirwin 9550 20.3 9.6 211 18.2 11.4 160
Marquette 8760 6.6 -M * 10.2 -M *
Middle Powder 7760 10.3 11.9 87 6.6 11.5 57
Owl Creek 8975 4.4 5.8 76 6.3 5.9 107
Powder River Pass 9480 16.8 10.1 166 16.0 12.4 129
Shell Creek 9580 21.9 15.0 146 16.5 13.6 121
Timber Creek 7950 3.6 4.9 73 -M 7.2 *
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Basin Index (%) 125 112
SHOSHONE RIVER
Blackwater 9780 35.2 22.4 157 32.6 20.2 161
Evening Star 9200 42.6 23.7 180 42.1 26.8 157
Marquette 8760 6.6 -M * 10.2 -M *
Sylvan Road 7120 15.2 10.8 141 22.4 16.5 136
Younts Peak 8350 -M 14.3 * -M 15.5 *
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Basin Index (%) 163 153
POWDER RIVER
Bear Trap Meadow 8200 -M 5.0 * 11.2 8.4 133
Cloud Peak Reservoir 9860 16.9 14.7 115 15.3 13.1 117
Grave Springs 8550 7.9 9.3 85 -M 10.4 *
Hansen Sawmill 8360 9.7 6.2 156 11.2 8.4 133
Middle Powder 7760 10.3 11.9 87 6.6 11.5 57
Powder River Pass 9480 16.8 10.1 166 16.0 12.4 129
Soldier Park 8720 8.5 -M * 10.7 -M *
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Basin Index (%) 118 112
TONGUE RIVER
Big Goose 7990 9.2 9.5 97 9.4 11.2 84
Bone Springs Div 9350 20.3 16.7 122 15.6 15.3 102
Burgess Junction 7880 10.9 11.8 92 9.3 12.2 76
Dome Lake 8880 16.0 11.7 137 12.8 13.4 96
Little Goose 8870 11.0 -M * 12.9 -M *
Sucker Creek 8880 12.0 12.0 100 9.6 14.2 68
Tie Creek 6870 5.9 5.5 107 9.9 11.5 86
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Basin Index (%) 111 86
BELLE FOURCHE
Cole Canyon 5910 -M 5.3 * 10.7 9.3 115
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Basin Index (%) * 115
CHEYENNE RIVER BASIN
Blind Park 6890 9.0 7.1 127 12.1 11.8 103
North Rapid Creek 6130 8.1 6.6 123 9.5 9.8 97
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Basin Index (%) 125 100
UPPER N. PLATTE
Arapaho Ridge 10960 19.7 20.7 95 19.4 22.2 87
Blackhall Mtn 9820 28.0 -M * 26.9 -M *
Columbine 9160 21.9 23.4 94 23.4 25.2 93
Divide Peak 8880 14.2 19.8 72 17.9 21.2 84
Joe Wright 10120 19.4 21.0 92 28.9 25.5 113
Laprele Creek 8375 6.6 9.4 70 8.1 12.3 66
Med Bow 10500 40.9 -M * 30.8 -M *
North French Creek 10130 28.4 29.2 97 27.6 26.4 105
Never Summer 10280 18.8 20.3 93 15.4 -M *
Old Battle 10000 25.3 31.1 81 23.8 34.6 69
Rawah 9020 11.2 10.6 106 15.1 14.0 108
Sage Creek Basin 7850 7.9 12.2 65 10.7 14.3 75
Sand Lake 10050 27.3 28.6 95 23.1 24.5 94
South Brush Creek 8440 11.3 12.0 94 12.2 15.0 81
Tower 10500 35.3 45.6 77 26.5 39.4 67
Webber Springs 9250 18.4 23.1 80 21.4 26.4 81
Willow Creek Pass 9540 13.0 12.1 107 13.9 13.3 105
Zirkel 9340 26.9 26.3 102 31.1 28.1 111
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Basin Index (%) 88 89
SWEETWATER
Deer Park 9700 12.7 15.4 82 15.6 19.6 80
Larsen Creek 9000 11.4 11.7 97 11.6 -M *
South Pass 9040 12.0 15.1 79 8.7 17.1 51
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Basin Index (%) 86 66
LOWER N. PLATTE
Casper Mtn. 7900 7.9 14.3 55 6.9 14.7 47
Laprele Creek 8375 6.6 9.4 70 8.1 12.3 66
Reno Hill 8400 10.1 14.0 72 11.6 15.2 76
Windy Peak 7900 6.4 7.8 82 8.4 10.4 81
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Basin Index (%) 68 67
LARAMIE RIVER
Brooklyn Lake 10240 25.7 21.5 120 25.4 20.9 122
Cinnabar Park 9574 21.3 21.0 101 24.8 24.0 103
Crow Creek 8330 4.1 7.0 59 10.9 10.7 102
Deadman Hill 10220 20.6 16.0 129 19.6 17.1 115
Rawah 9020 11.2 10.6 106 15.1 14.0 108
Roach 9700 13.6 16.4 83 17.1 19.0 90
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Basin Index (%) 104 107
S. PLATTE
Black Mountain 8920 10.6 -M * 13.4 -M *
Crow Creek 8330 4.1 7.0 59 10.9 10.7 102
Deadman Hill 10220 20.6 16.0 129 19.6 17.1 115
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Basin Index (%) 107 110
LITTLE SNAKE RIVER
Battle Mountain 7440 5.5 9.8 56 10.6 14.8 72
Divide Peak 8880 14.2 19.8 72 17.9 21.2 84
Elk River 8700 15.1 19.2 79 16.4 19.8 83
Little Snake River 8915 21.3 24.9 86 27.5 29.2 94
Old Battle 10000 25.3 31.1 81 23.8 34.6 69
Sage Creek Basin 7850 7.9 12.2 65 10.7 14.3 75
Sandstone RS 8150 8.7 12.8 68 9.2 18.1 51
Whiskey Park 8950 24.5 27.2 90 25.4 27.6 92
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Basin Index (%) 78 79
UPPER GREEN RIVER
Big Sandy Opening 9080 13.4 12.5 107 13.2 13.0 102
Blind Bull Sum 8650 34.1 23.1 148 20.6 19.2 107
East Rim Divide 7930 12.9 10.2 126 12.7 11.6 109
Elkhart Park G.S. 9400 12.6 12.2 103 12.1 13.1 92
Gros Ventre Summit 8750 16.6 12.9 129 15.6 12.7 123
Gunsight Pass 9820 17.7 13.7 129 16.9 13.6 124
Kendall R.S. 7740 15.4 11.5 134 15.9 14.0 114
Loomis Park 8240 18.6 13.8 135 18.9 17.0 111
New Fork Lake 8340 12.1 10.3 117 11.5 10.6 108
Pocket Creek 9360 9.0 -M * 9.2 -M *
Snider Basin 8060 12.9 12.3 105 15.0 14.0 107
Spring Creek Divide 9000 26.8 22.5 119 24.9 23.5 106
Triple Peak 8500 31.5 21.9 144 31.9 25.0 128
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Basin Index (%) 127 112
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.2 -M * 8.8 -M *
Buck Pasture 9632 11.6 -M * 13.1 -M *
EF Blacks Fork GS 9360 10.4 -M * 6.0 -M *
Hams Fork 7840 9.2 10.7 86 9.5 11.2 85
Hewinta 9500 7.3 10.9 67 11.2 13.9 81
Hickerson Park 9122 6.5 7.9 82 7.9 10.1 78
Hole-in-Rock 9168 6.9 7.0 99 8.4 9.7 87
Indian Creek 9425 22.0 24.6 89 16.0 22.3 72
Kelley R.S. 8180 13.6 14.8 92 14.7 17.8 83
Spirit Lk 10235 10.3 -M * 11.8 -M *
Steel Creek Park 10158 13.4 15.7 85 13.6 16.3 83
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Basin Index (%) 86 80
UPPER BEAR RIVER
Bear River RS 8777 5.3 -M * 10.4 -M *
Bug Lake 7987 14.5 18.3 79 15.9 19.2 83
Burts Miller Ranch 8000 3.2 -M * 6.2 -M *
Chalk Creek #1 9171 14.9 24.3 61 16.1 24.9 65
Hayden Fork 9130 10.6 15.4 69 16.0 20.9 77
Kelley R.S. 8180 13.6 14.8 92 14.7 17.8 83
Lily Lake 9133 9.2 12.6 73 11.2 17.0 66
Monte Cristo 8932 21.4 27.6 78 21.5 25.6 84
Salt River Summit 7640 11.3 12.9 88 13.0 16.4 79
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Basin Index (%) 76 76
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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.