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 9 , 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 16.7 13.8 121 18.1 18.1 100
Black Bear 8170 38.0 31.2 122 35.1 32.8 107
Blind Bull Sum 8650 28.3 19.1 148 17.1 16.8 102
Cottonwood Creek 7670 19.0 18.3 104 20.8 20.6 101
East Rim Divide 7930 10.5 9.3 113 10.3 10.1 102
Grand Targhee 9260 40.5 31.5 129 26.3 25.4 104
Granite Creek 6770 16.0 14.5 110 17.6 17.4 101
Grassy Lake 7265 28.1 27.3 103 31.2 31.0 101
Gros Ventre Summit 8750 11.7 10.7 109 12.0 10.8 111
Gunsight Pass 9820 13.4 11.5 117 13.2 11.5 115
Lewis Lake Divide 7850 34.3 26.1 131 -M 30.5 *
Phillips Bench 8200 22.1 20.9 106 22.9 24.0 95
Salt River Summit 7640 9.4 11.0 85 10.7 14.1 76
Snake River Station 6920 16.8 15.0 112 21.3 19.5 109
Spring Creek Divide 9000 22.4 19.5 115 21.2 20.3 104
Thumb Divide 7980 16.9 13.0 130 16.7 15.6 107
Togwotee Pass 9580 27.3 19.3 141 27.7 20.5 135
Two Ocean Plateau 9240 33.3 22.7 147 -M 23.1 *
Willow Creek 8080 27.8 24.0 116 30.0 28.1 107
Younts Peak 8350 -M 12.2 * -M 13.3 *
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Basin Index (%) 121 105
MADISON-GALLATIN
Black Bear 8170 38.0 31.2 122 35.1 32.8 107
Canyon 7870 15.7 11.4 138 17.6 13.9 127
Madison Plateau 7750 24.4 19.0 128 23.8 22.6 105
West Yellowstone 6700 12.6 9.5 133 15.4 12.3 125
Whiskey Creek 6800 14.8 13.0 114 16.9 17.2 98
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Basin Index (%) 125 110
YELLOWSTONE
Beartooth Lake 9360 35.6 18.1 197 30.9 16.7 185
Burnt Mtn 5880 7.0 4.4 159 13.1 10.0 131
Canyon 7870 15.7 11.4 138 17.6 13.9 127
Cole Creek 7850 12.6 11.0 115 8.2 9.8 84
Evening Star 9200 36.4 20.6 177 -M 23.2 *
Fisher Creek 9100 46.9 26.7 176 40.8 26.9 152
Northeast Entrance 7350 13.4 8.6 156 16.3 10.4 157
Parker Peak 9400 29.9 16.5 181 22.9 14.8 155
Sylvan Lake 8420 22.1 16.8 132 23.6 18.9 125
Thumb Divide 7980 16.9 13.0 130 16.7 15.6 107
Two Ocean Plateau 9240 33.3 22.7 147 -M 23.1 *
White Mill 8700 37.2 19.0 196 27.9 20.1 139
Wolverine 7650 20.0 9.0 222 19.1 10.4 184
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Basin Index (%) 165 142
WIND RIVER
Burroughs Creek 8750 14.5 -M * 16.7 -M *
Castle Creek 8400 7.8 -M * 9.0 -M *
Cold Springs 9630 8.3 5.8 143 8.9 7.9 113
Deer Park 9700 9.4 11.8 80 12.3 16.1 76
Hobbs Park 10100 14.0 10.8 130 12.1 10.2 119
Kirwin 9550 17.4 7.6 229 15.8 9.3 170
Little Warm 9370 13.6 8.6 158 14.1 10.4 136
Owl Creek 8975 3.6 4.3 84 5.3 4.5 118
South Pass 9040 9.5 12.4 77 -M 14.4 *
St. Lawrence Alt 8620 3.1 5.8 53 7.2 6.9 104
Togwotee Pass 9580 27.3 19.3 141 27.7 20.5 135
Townsend Creek 8700 6.1 7.3 84 7.4 9.2 80
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Basin Index (%) 120 117
BIGHORN BASIN
Bald Mtn. 9380 17.9 15.9 113 12.6 13.8 91
Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132
Bone Springs Div 9350 16.0 13.2 121 11.9 12.4 96
Grave Springs 8550 5.5 7.3 75 4.5 8.2 55
Kirwin 9550 17.4 7.6 229 15.8 9.3 170
Marquette 8760 4.9 -M * 8.3 -M *
Middle Powder 7760 7.2 8.7 83 -M 9.2 *
Owl Creek 8975 3.6 4.3 84 5.3 4.5 118
Powder River Pass 9480 14.4 8.3 173 13.2 10.1 131
Shell Creek 9580 18.0 12.2 148 13.5 11.1 122
Timber Creek 7950 2.9 4.0 72 -M 5.5 *
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Basin Index (%) 129 113
SHOSHONE RIVER
Blackwater 9780 30.7 18.8 163 28.5 17.0 168
Evening Star 9200 36.4 20.6 177 -M 23.2 *
Marquette 8760 4.9 -M * 8.3 -M *
Sylvan Road 7120 13.5 10.0 135 19.2 14.6 132
Younts Peak 8350 -M 12.2 * -M 13.3 *
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Basin Index (%) 163 151*
POWDER RIVER
Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132
Cloud Peak Reservoir 9860 13.1 11.5 114 11.6 10.2 114
Grave Springs 8550 5.5 7.3 75 4.5 8.2 55
Hansen Sawmill 8360 6.8 5.1 133 8.0 6.5 123
Middle Powder 7760 7.2 8.7 83 -M 9.2 *
Powder River Pass 9480 14.4 8.3 173 13.2 10.1 131
Soldier Park 8720 5.4 -M * 7.9 -M *
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Basin Index (%) 121 111
TONGUE RIVER
Big Goose 7990 6.2 6.7 93 6.6 8.3 80
Bone Springs Div 9350 16.0 13.2 121 11.9 12.4 96
Burgess Junction 7880 7.6 9.1 84 6.9 9.6 72
Dome Lake 8880 12.2 9.3 131 9.5 10.5 90
Little Goose 8870 7.4 -M * 9.5 -M *
Sucker Creek 8880 8.4 9.9 85 6.4 11.2 57
Tie Creek 6870 3.6 4.7 77 7.1 8.9 80
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Basin Index (%) 102 79
BELLE FOURCHE
Cole Canyon 5910 5.6 5.0 112 7.5 7.3 103
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Basin Index (%) 112 103
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 6.7 104 9.5 9.9 96
North Rapid Creek 6130 6.4 6.2 103 6.9 8.0 86
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Basin Index (%) 104 92
UPPER N. PLATTE
Arapaho Ridge 10960 16.5 17.5 94 16.2 18.5 88
Blackhall Mtn 9820 23.2 -M * 22.8 -M *
Columbine 9160 19.3 20.9 92 19.8 21.4 93
Divide Peak 8880 11.6 16.8 69 15.2 17.8 85
Joe Wright 10120 13.5 18.2 74 22.5 21.2 106
Laprele Creek 8375 5.5 8.3 66 6.9 9.9 70
Med Bow 10500 33.9 -M * 27.8 -M *
North French Creek 10130 22.4 22.5 100 22.1 22.2 100
Never Summer 10280 14.9 16.8 89 11.8 -M *
Old Battle 10000 21.5 25.3 85 21.0 29.4 71
Rawah 9020 9.1 9.2 99 12.3 11.4 108
Sage Creek Basin 7850 8.2 11.3 73 8.5 12.3 69
Sand Lake 10050 22.0 22.3 99 18.5 20.1 92
South Brush Creek 8440 8.1 11.1 73 9.6 12.4 77
Tower 10500 28.4 37.9 75 25.4 33.6 76
Webber Springs 9250 16.3 20.0 82 18.8 22.3 84
Willow Creek Pass 9540 10.7 10.2 105 11.5 10.9 106
Zirkel 9340 23.0 25.0 92 26.8 24.1 111
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Basin Index (%) 86 89
SWEETWATER
Deer Park 9700 9.4 11.8 80 12.3 16.1 76
Larsen Creek 9000 9.5 10.2 93 9.5 -M *
South Pass 9040 9.5 12.4 77 -M 14.4 *
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Basin Index (%) 83 76*
LOWER N. PLATTE
Casper Mtn. 7900 6.4 11.3 57 5.4 11.8 46
Laprele Creek 8375 5.5 8.3 66 6.9 9.9 70
Reno Hill 8400 7.9 11.1 71 9.0 11.9 76
Windy Peak 7900 5.1 6.4 80 6.8 8.4 81
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Basin Index (%) 67 67
LARAMIE RIVER
Brooklyn Lake 10240 20.6 16.5 125 21.2 17.2 123
Cinnabar Park 9574 19.0 17.7 107 21.6 20.6 105
Crow Creek 8330 2.4 7.0 34 8.2 8.4 98
Deadman Hill 10220 16.1 12.8 126 15.4 13.7 112
Rawah 9020 9.1 9.2 99 12.3 11.4 108
Roach 9700 11.4 13.2 86 14.4 15.7 92
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Basin Index (%) 103 107
S. PLATTE
Black Mountain 8920 7.6 -M * 10.3 -M *
Crow Creek 8330 2.4 7.0 34 8.2 8.4 98
Deadman Hill 10220 16.1 12.8 126 15.4 13.7 112
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Basin Index (%) 93 107
LITTLE SNAKE RIVER
Battle Mountain 7440 5.7 10.4 55 8.3 12.8 65
Divide Peak 8880 11.6 16.8 69 15.2 17.8 85
Elk River 8700 12.9 16.7 77 13.7 16.9 81
Little Snake River 8915 18.4 20.2 91 23.8 25.7 93
Old Battle 10000 21.5 25.3 85 21.0 29.4 71
Sage Creek Basin 7850 8.2 11.3 73 8.5 12.3 69
Sandstone RS 8150 7.3 11.8 62 7.1 15.8 45
Whiskey Park 8950 20.4 23.0 89 21.7 23.6 92
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Basin Index (%) 78 77
UPPER GREEN RIVER
Big Sandy Opening 9080 10.6 10.6 100 10.5 11.1 95
Blind Bull Sum 8650 28.3 19.1 148 17.1 16.8 102
East Rim Divide 7930 10.5 9.3 113 10.3 10.1 102
Elkhart Park G.S. 9400 10.4 10.0 104 10.1 11.1 91
Gros Ventre Summit 8750 11.7 10.7 109 12.0 10.8 111
Gunsight Pass 9820 13.4 11.5 117 13.2 11.5 115
Kendall R.S. 7740 13.0 10.4 125 13.3 12.4 107
Loomis Park 8240 14.9 12.5 119 15.7 14.8 106
New Fork Lake 8340 10.2 8.9 115 9.6 9.2 104
Pocket Creek 9360 7.1 -M * 7.1 -M *
Snider Basin 8060 11.5 10.5 110 13.4 12.1 111
Spring Creek Divide 9000 22.4 19.5 115 21.2 20.3 104
Triple Peak 8500 25.0 18.3 137 26.9 21.4 126
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Basin Index (%) 120 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.0 -M * 7.3 -M *
Buck Pasture 9632 9.2 -M * 10.1 -M *
EF Blacks Fork GS 9360 9.3 -M * -M -M *
Hams Fork 7840 8.1 9.9 82 7.9 9.6 82
Hewinta 9500 6.6 8.6 77 9.1 11.4 80
Hickerson Park 9122 5.9 6.3 94 5.4 8.0 68
Hole-in-Rock 9168 5.2 6.0 87 5.8 7.5 77
Indian Creek 9425 17.8 20.0 89 13.2 18.8 70
Kelley R.S. 8180 11.2 12.6 89 12.3 15.3 80
Spirit Lk 10235 6.2 -M * 7.7 -M *
Steel Creek Park 10158 10.6 12.4 85 10.8 13.1 82
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Basin Index (%) 86 77
UPPER BEAR RIVER
Bear River RS 8777 7.5 -M * 8.5 -M *
Bug Lake 7987 13.2 15.9 83 13.5 16.2 83
Burts Miller Ranch 8000 4.0 -M * 5.3 -M *
Chalk Creek #1 9171 11.6 19.6 59 12.8 20.6 62
Hayden Fork 9130 10.0 13.0 77 12.4 17.2 72
Kelley R.S. 8180 11.2 12.6 89 12.3 15.3 80
Lily Lake 9133 7.2 10.9 66 9.0 14.0 64
Monte Cristo 8932 16.7 22.7 74 16.4 21.5 76
Salt River Summit 7640 9.4 11.0 85 10.7 14.1 76
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Basin Index (%) 75 73
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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.