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 10 , 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 18.2 99
Black Bear 8170 38.1 31.3 122 35.1 32.9 107
Blind Bull Sum 8650 28.7 19.3 149 17.2 16.8 102
Cottonwood Creek 7670 19.0 18.4 103 20.9 20.7 101
East Rim Divide 7930 10.6 9.4 113 10.4 10.2 102
Grand Targhee 9260 40.3 31.7 127 26.2 25.5 103
Granite Creek 6770 16.1 14.6 110 17.8 17.5 102
Grassy Lake 7265 28.1 27.5 102 31.3 31.1 101
Gros Ventre Summit 8750 11.9 10.8 110 12.0 10.8 111
Gunsight Pass 9820 13.6 11.5 118 13.3 11.6 115
Lewis Lake Divide 7850 34.2 26.3 130 -M 30.6 *
Phillips Bench 8200 22.2 21.1 105 22.9 24.1 95
Salt River Summit 7640 9.4 11.1 85 10.7 14.2 75
Snake River Station 6920 16.7 15.1 111 21.3 19.6 109
Spring Creek Divide 9000 22.4 19.6 114 21.3 20.3 105
Thumb Divide 7980 16.9 13.1 129 16.7 15.7 106
Togwotee Pass 9580 27.6 19.4 142 27.9 20.6 135
Two Ocean Plateau 9240 33.6 22.9 147 -M 23.2 *
Willow Creek 8080 27.9 24.1 116 30.0 28.3 106
Younts Peak 8350 -M 12.3 * -M 13.4 *
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Basin Index (%) 120 104
MADISON-GALLATIN
Black Bear 8170 38.1 31.3 122 35.1 32.9 107
Canyon 7870 15.8 11.4 139 17.7 13.9 127
Madison Plateau 7750 24.3 19.2 127 23.9 22.7 105
West Yellowstone 6700 12.4 9.6 129 15.4 12.4 124
Whiskey Creek 6800 14.8 13.1 113 17.0 17.3 98
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Basin Index (%) 125 110
YELLOWSTONE
Beartooth Lake 9360 35.8 18.2 197 30.9 16.7 185
Burnt Mtn 5880 7.0 4.4 159 13.1 10.2 128
Canyon 7870 15.8 11.4 139 17.7 13.9 127
Cole Creek 7850 12.8 11.1 115 8.3 9.8 85
Evening Star 9200 36.5 20.8 175 31.1 23.3 133
Fisher Creek 9100 47.6 26.9 177 41.1 27.0 152
Northeast Entrance 7350 13.4 8.6 156 16.4 10.5 156
Parker Peak 9400 30.2 16.6 182 22.9 14.9 154
Sylvan Lake 8420 22.1 16.9 131 23.7 19.0 125
Thumb Divide 7980 16.9 13.1 129 16.7 15.7 106
Two Ocean Plateau 9240 33.6 22.9 147 -M 23.2 *
White Mill 8700 37.5 19.1 196 28.3 20.2 140
Wolverine 7650 20.0 9.0 222 19.2 10.5 183
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Basin Index (%) 165 141
WIND RIVER
Burroughs Creek 8750 14.6 -M * 16.7 -M *
Castle Creek 8400 7.8 -M * 9.0 -M *
Cold Springs 9630 8.4 5.9 142 8.9 8.0 111
Deer Park 9700 9.5 12.0 79 12.3 16.2 76
Hobbs Park 10100 14.1 10.9 129 12.1 10.3 117
Kirwin 9550 17.8 7.7 231 16.0 9.4 170
Little Warm 9370 13.6 8.6 158 14.2 10.5 135
Owl Creek 8975 3.6 4.3 84 5.3 4.6 115
South Pass 9040 9.5 12.5 76 -M 14.4 *
St. Lawrence Alt 8620 3.0 5.8 52 7.2 7.0 103
Togwotee Pass 9580 27.6 19.4 142 27.9 20.6 135
Townsend Creek 8700 6.1 7.4 82 7.5 9.3 81
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Basin Index (%) 120 116
BIGHORN BASIN
Bald Mtn. 9380 18.0 15.9 113 12.6 13.9 91
Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132
Bone Springs Div 9350 16.0 13.3 120 12.0 12.5 96
Grave Springs 8550 5.5 7.4 74 4.5 8.3 54
Kirwin 9550 17.8 7.7 231 16.0 9.4 170
Marquette 8760 5.0 -M * 8.7 -M *
Middle Powder 7760 7.2 8.8 82 -M 9.2 *
Owl Creek 8975 3.6 4.3 84 5.3 4.6 115
Powder River Pass 9480 14.3 8.4 170 13.2 10.1 131
Shell Creek 9580 17.9 12.2 147 13.5 11.1 122
Timber Creek 7950 2.9 4.0 72 -M 5.5 *
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Basin Index (%) 129 112
SHOSHONE RIVER
Blackwater 9780 31.1 19.0 164 28.6 17.2 166
Evening Star 9200 36.5 20.8 175 31.1 23.3 133
Marquette 8760 5.0 -M * 8.7 -M *
Sylvan Road 7120 13.7 10.0 137 19.3 14.6 132
Younts Peak 8350 -M 12.3 * -M 13.4 *
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Basin Index (%) 163 143
POWDER RIVER
Bear Trap Meadow 8200 8.1 4.6 176 8.6 6.5 132
Cloud Peak Reservoir 9860 13.1 11.7 112 11.6 10.3 113
Grave Springs 8550 5.5 7.4 74 4.5 8.3 54
Hansen Sawmill 8360 6.7 5.1 131 8.1 6.5 125
Middle Powder 7760 7.2 8.8 82 -M 9.2 *
Powder River Pass 9480 14.3 8.4 170 13.2 10.1 131
Soldier Park 8720 5.4 -M * 7.9 -M *
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Basin Index (%) 119 110
TONGUE RIVER
Big Goose 7990 6.2 6.8 91 6.7 8.4 80
Bone Springs Div 9350 16.0 13.3 120 12.0 12.5 96
Burgess Junction 7880 7.7 9.2 84 6.9 9.6 72
Dome Lake 8880 12.4 9.3 133 9.5 10.6 90
Little Goose 8870 7.4 -M * 9.6 -M *
Sucker Creek 8880 8.4 10.0 84 6.5 11.3 58
Tie Creek 6870 3.6 4.7 77 7.2 9.0 80
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Basin Index (%) 102 79
BELLE FOURCHE
Cole Canyon 5910 5.6 5.0 112 7.5 7.4 101
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Basin Index (%) 112 101
CHEYENNE RIVER BASIN
Blind Park 6890 6.8 6.7 101 9.5 9.9 96
North Rapid Creek 6130 6.5 6.2 105 7.0 8.1 86
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Basin Index (%) 103 92
UPPER N. PLATTE
Arapaho Ridge 10960 16.6 17.6 94 16.3 18.7 87
Blackhall Mtn 9820 23.2 -M * 22.8 -M *
Columbine 9160 19.4 21.0 92 19.8 21.6 92
Divide Peak 8880 11.6 16.9 69 15.2 17.9 85
Joe Wright 10120 13.5 18.3 74 22.6 21.3 106
Laprele Creek 8375 5.5 8.4 65 6.9 10.0 69
Med Bow 10500 34.0 -M * 27.8 -M *
North French Creek 10130 22.4 22.8 98 22.1 22.3 99
Never Summer 10280 14.9 16.9 88 11.8 -M *
Old Battle 10000 21.5 25.4 85 21.0 29.6 71
Rawah 9020 9.1 9.2 99 12.3 11.5 107
Sage Creek Basin 7850 8.1 11.5 70 8.5 12.3 69
Sand Lake 10050 22.0 22.4 98 18.6 20.2 92
South Brush Creek 8440 8.0 11.1 72 9.5 12.5 76
Tower 10500 28.4 38.0 75 25.4 33.8 75
Webber Springs 9250 16.3 20.1 81 18.8 22.4 84
Willow Creek Pass 9540 10.7 10.3 104 11.5 10.9 106
Zirkel 9340 23.1 25.2 92 26.9 24.5 110
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Basin Index (%) 85 88
SWEETWATER
Deer Park 9700 9.5 12.0 79 12.3 16.2 76
Larsen Creek 9000 9.5 10.3 92 9.6 -M *
South Pass 9040 9.5 12.5 76 -M 14.4 *
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Basin Index (%) 82 76*
LOWER N. PLATTE
Casper Mtn. 7900 6.3 11.4 55 5.4 11.8 46
Laprele Creek 8375 5.5 8.4 65 6.9 10.0 69
Reno Hill 8400 7.9 11.2 71 9.0 12.0 75
Windy Peak 7900 5.1 6.5 78 6.8 8.4 81
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Basin Index (%) 66 67
LARAMIE RIVER
Brooklyn Lake 10240 20.6 16.7 123 21.2 17.3 123
Cinnabar Park 9574 19.0 17.8 107 21.6 20.6 105
Crow Creek 8330 2.3 7.1 32 8.2 8.4 98
Deadman Hill 10220 16.1 12.9 125 15.5 13.8 112
Rawah 9020 9.1 9.2 99 12.3 11.5 107
Roach 9700 11.4 13.3 86 14.4 15.8 91
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Basin Index (%) 102 107
S. PLATTE
Black Mountain 8920 7.5 -M * 10.3 -M *
Crow Creek 8330 2.3 7.1 32 8.2 8.4 98
Deadman Hill 10220 16.1 12.9 125 15.5 13.8 112
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Basin Index (%) 92 107
LITTLE SNAKE RIVER
Battle Mountain 7440 5.6 10.5 53 8.5 12.8 66
Divide Peak 8880 11.6 16.9 69 15.2 17.9 85
Elk River 8700 12.9 16.8 77 13.7 17.0 81
Little Snake River 8915 18.4 20.3 91 23.8 25.7 93
Old Battle 10000 21.5 25.4 85 21.0 29.6 71
Sage Creek Basin 7850 8.1 11.5 70 8.5 12.3 69
Sandstone RS 8150 7.3 11.8 62 7.1 15.9 45
Whiskey Park 8950 20.4 23.2 88 21.7 23.8 91
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Basin Index (%) 78 77
UPPER GREEN RIVER
Big Sandy Opening 9080 10.7 10.7 100 10.6 11.1 95
Blind Bull Sum 8650 28.7 19.3 149 17.2 16.8 102
East Rim Divide 7930 10.6 9.4 113 10.4 10.2 102
Elkhart Park G.S. 9400 10.5 10.0 105 10.1 11.1 91
Gros Ventre Summit 8750 11.9 10.8 110 12.0 10.8 111
Gunsight Pass 9820 13.6 11.5 118 13.3 11.6 115
Kendall R.S. 7740 13.1 10.5 125 13.4 12.5 107
Loomis Park 8240 15.1 12.6 120 15.8 14.9 106
New Fork Lake 8340 10.3 9.0 114 9.7 9.3 104
Pocket Creek 9360 7.2 -M * 7.2 -M *
Snider Basin 8060 11.6 10.6 109 13.4 12.1 111
Spring Creek Divide 9000 22.4 19.6 114 21.3 20.3 105
Triple Peak 8500 25.2 18.5 136 27.1 21.5 126
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Basin Index (%) 120 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.0 -M * 7.3 -M *
Buck Pasture 9632 9.1 -M * 10.0 -M *
EF Blacks Fork GS 9360 9.2 -M * -M -M *
Hams Fork 7840 8.1 9.9 82 7.9 9.6 82
Hewinta 9500 6.6 8.6 77 9.2 11.5 80
Hickerson Park 9122 5.7 6.4 89 5.5 8.1 68
Hole-in-Rock 9168 5.1 6.0 85 5.8 7.6 76
Indian Creek 9425 17.8 20.2 88 13.2 18.9 70
Kelley R.S. 8180 11.2 12.6 89 12.3 15.4 80
Spirit Lk 10235 6.2 -M * 7.7 -M *
Steel Creek Park 10158 10.7 12.5 86 10.8 13.2 82
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Basin Index (%) 86 77
UPPER BEAR RIVER
Bear River RS 8777 7.3 -M * 8.6 -M *
Bug Lake 7987 13.2 16.0 82 13.4 16.3 82
Burts Miller Ranch 8000 4.0 -M * 5.3 -M *
Chalk Creek #1 9171 11.6 19.8 59 12.8 20.7 62
Hayden Fork 9130 10.0 13.2 76 12.5 17.4 72
Kelley R.S. 8180 11.2 12.6 89 12.3 15.4 80
Lily Lake 9133 7.2 11.0 65 9.0 14.0 64
Monte Cristo 8932 16.7 22.8 73 16.3 21.7 75
Salt River Summit 7640 9.4 11.1 85 10.7 14.2 75
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Basin Index (%) 74 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.