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 MONDAY: FEBRUARY 5 , 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 13.1 11.0 119 14.7 14.4 102
Black Bear 8170 28.6 23.7 121 27.4 25.5 107
Blind Bull Sum 8650 23.2 14.5 160 14.0 13.2 106
Cottonwood Creek 7670 14.9 13.6 110 16.9 16.3 104
East Rim Divide 7930 8.2 6.9 119 8.1 7.9 103
Grand Targhee 9260 34.7 24.1 144 22.1 21.3 104
Granite Creek 6770 12.3 11.0 112 14.8 14.0 106
Grassy Lake 7265 21.3 21.0 101 24.6 24.6 100
Gros Ventre Summit 8750 9.8 8.6 114 9.3 8.4 111
Gunsight Pass 9820 10.8 8.5 127 11.0 9.2 120
Lewis Lake Divide 7850 25.5 20.4 125 26.9 23.7 114
Phillips Bench 8200 16.4 16.1 102 17.4 18.7 93
Salt River Summit 7640 6.7 8.2 82 8.5 10.9 78
Snake River Station 6920 13.1 11.4 115 17.3 15.9 109
Spring Creek Divide 9000 17.6 15.1 117 17.0 15.9 107
Thumb Divide 7980 12.8 9.6 133 13.4 12.4 108
Togwotee Pass 9580 21.6 15.3 141 21.9 16.2 135
Two Ocean Plateau 9240 27.1 18.3 148 19.8 17.7 112
Willow Creek 8080 21.3 17.8 120 23.9 22.2 108
Younts Peak 8350 -M 10.0 * -M 10.8 *
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Basin Index (%) 123 107
MADISON-GALLATIN
Black Bear 8170 28.6 23.7 121 27.4 25.5 107
Canyon 7870 11.7 8.4 139 13.5 11.0 123
Madison Plateau 7750 17.6 14.3 123 18.3 17.7 103
West Yellowstone 6700 8.9 7.1 125 11.6 9.9 117
Whiskey Creek 6800 10.7 9.7 110 12.5 13.6 92
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Basin Index (%) 123 107
YELLOWSTONE
Beartooth Lake 9360 27.4 14.3 192 25.0 13.2 189
Burnt Mtn 5880 4.0 2.6 154 9.6 8.1 119
Canyon 7870 11.7 8.4 139 13.5 11.0 123
Cole Creek 7850 9.8 8.6 114 6.4 7.8 82
Evening Star 9200 28.3 16.7 169 29.8 18.4 162
Fisher Creek 9100 36.5 21.3 171 31.0 21.3 146
Northeast Entrance 7350 9.0 6.6 136 12.5 8.5 147
Parker Peak 9400 23.4 13.4 175 20.3 11.7 174
Sylvan Lake 8420 16.7 13.4 125 18.7 15.2 123
Thumb Divide 7980 12.8 9.6 133 13.4 12.4 108
Two Ocean Plateau 9240 27.1 18.3 148 19.8 17.7 112
White Mill 8700 28.8 15.0 192 21.0 15.9 132
Wolverine 7650 13.5 7.2 188 -M 8.4 *
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Basin Index (%) 160 137
WIND RIVER
Burroughs Creek 8750 11.4 -M * 13.2 -M *
Castle Creek 8400 6.2 -M * 7.6 -M *
Cold Springs 9630 6.7 4.8 140 6.8 6.4 106
Deer Park 9700 7.5 9.5 79 9.7 12.6 77
Hobbs Park 10100 11.4 8.0 142 9.5 8.0 119
Kirwin 9550 14.0 6.0 233 12.6 7.4 170
Little Warm 9370 11.4 6.6 173 11.5 8.4 137
Owl Creek 8975 3.1 3.1 100 4.8 3.6 133
South Pass 9040 7.6 9.7 78 5.3 11.2 47
St. Lawrence Alt 8620 2.7 4.2 64 6.1 5.5 111
Togwotee Pass 9580 21.6 15.3 141 21.9 16.2 135
Townsend Creek 8700 5.0 5.4 93 6.4 7.3 88
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Basin Index (%) 125 109
BIGHORN BASIN
Bald Mtn. 9380 14.3 11.0 130 9.7 11.0 88
Bear Trap Meadow 8200 6.2 3.5 177 6.9 5.3 130
Bone Springs Div 9350 12.7 9.9 128 9.5 9.8 97
Grave Springs 8550 4.4 5.0 88 3.7 6.6 56
Kirwin 9550 14.0 6.0 233 12.6 7.4 170
Marquette 8760 4.2 -M * 7.6 -M *
Middle Powder 7760 5.8 6.5 89 4.2 7.6 55
Owl Creek 8975 3.1 3.1 100 4.8 3.6 133
Powder River Pass 9480 11.9 6.8 175 -M 8.1 *
Shell Creek 9580 -M 9.3 * 10.9 9.1 120
Timber Creek 7950 2.5 3.1 81 1.6 4.6 35
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Basin Index (%) 136 98
SHOSHONE RIVER
Blackwater 9780 24.6 15.0 164 22.3 13.6 164
Evening Star 9200 28.3 16.7 169 29.8 18.4 162
Marquette 8760 4.2 -M * 7.6 -M *
Sylvan Road 7120 10.7 7.9 135 15.3 12.1 126
Younts Peak 8350 -M 10.0 * -M 10.8 *
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Basin Index (%) 161 153
POWDER RIVER
Bear Trap Meadow 8200 6.2 3.5 177 6.9 5.3 130
Cloud Peak Reservoir 9860 10.7 8.6 124 9.6 8.1 119
Grave Springs 8550 4.4 5.0 88 3.7 6.6 56
Hansen Sawmill 8360 5.4 4.0 135 6.6 5.2 127
Middle Powder 7760 5.8 6.5 89 4.2 7.6 55
Powder River Pass 9480 11.9 6.8 175 -M 8.1 *
Soldier Park 8720 3.9 -M * 6.5 -M *
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Basin Index (%) 129 95
TONGUE RIVER
Big Goose 7990 4.9 5.0 98 5.3 6.7 79
Bone Springs Div 9350 12.7 9.9 128 9.5 9.8 97
Burgess Junction 7880 6.1 6.8 90 5.2 7.7 68
Dome Lake 8880 8.8 7.0 126 7.4 8.6 86
Little Goose 8870 5.9 -M * 8.0 -M *
Sucker Creek 8880 6.6 7.3 90 -M 8.9 *
Tie Creek 6870 2.6 3.5 74 5.8 7.3 79
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Basin Index (%) 106 83
BELLE FOURCHE
Cole Canyon 5910 4.4 3.4 129 6.1 5.8 105
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Basin Index (%) 129 105
CHEYENNE RIVER BASIN
Blind Park 6890 5.2 5.0 104 7.5 8.0 94
North Rapid Creek 6130 5.2 4.4 118 5.5 6.5 85
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Basin Index (%) 111 90
UPPER N. PLATTE
Arapaho Ridge 10960 -M 13.5 * -M 14.6 *
Blackhall Mtn 9820 17.3 -M * 17.3 -M *
Columbine 9160 13.2 15.2 87 15.5 16.8 92
Divide Peak 8880 8.8 12.8 69 12.2 14.0 87
Joe Wright 10120 10.4 13.2 79 18.4 16.5 112
Laprele Creek 8375 4.4 5.6 79 5.9 7.7 77
Med Bow 10500 28.1 -M * 23.7 -M *
North French Creek 10130 18.4 16.4 112 18.6 17.3 108
Never Summer 10280 11.6 12.9 90 9.6 -M *
Old Battle 10000 16.2 19.8 82 15.9 23.1 69
Rawah 9020 6.8 6.5 105 10.0 9.3 108
Sage Creek Basin 7850 6.1 8.8 69 7.2 10.1 71
Sand Lake 10050 17.6 16.9 104 14.3 15.5 92
South Brush Creek 8440 6.6 7.5 88 8.0 9.8 82
Tower 10500 20.3 28.5 71 21.0 26.2 80
Webber Springs 9250 11.8 14.6 81 14.0 17.5 80
Willow Creek Pass 9540 8.4 7.9 106 9.2 8.5 108
Zirkel 9340 15.3 19.1 80 20.0 19.7 102
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Basin Index (%) 86 90
SWEETWATER
Deer Park 9700 7.5 9.5 79 9.7 12.6 77
Larsen Creek 9000 6.6 7.6 87 7.8 -M *
South Pass 9040 7.6 9.7 78 5.3 11.2 47
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Basin Index (%) 81 63
LOWER N. PLATTE
Casper Mtn. 7900 5.2 7.8 67 -M 9.3 *
Laprele Creek 8375 4.4 5.6 79 5.9 7.7 77
Reno Hill 8400 6.7 7.9 85 7.7 9.2 84
Windy Peak 7900 4.2 4.3 98 5.7 6.5 88
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Basin Index (%) 80 82
LARAMIE RIVER
Brooklyn Lake 10240 16.7 12.1 138 17.2 13.3 129
Cinnabar Park 9574 -M 13.6 * -M 16.6 *
Crow Creek 8330 1.8 5.7 32 7.5 6.5 115
Deadman Hill 10220 12.7 10.4 122 12.4 10.5 118
Rawah 9020 6.8 6.5 105 10.0 9.3 108
Roach 9700 9.2 10.3 89 11.8 12.1 98
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Basin Index (%) 105 114
S. PLATTE
Black Mountain 8920 6.0 -M * 8.6 -M *
Crow Creek 8330 1.8 5.7 32 7.5 6.5 115
Deadman Hill 10220 12.7 10.4 122 12.4 10.5 118
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Basin Index (%) 90 117
LITTLE SNAKE RIVER
Battle Mountain 7440 3.3 7.3 45 6.6 9.9 67
Divide Peak 8880 8.8 12.8 69 12.2 14.0 87
Elk River 8700 9.0 11.9 76 10.1 13.2 77
Little Snake River 8915 13.3 16.1 83 18.5 21.4 86
Old Battle 10000 16.2 19.8 82 15.9 23.1 69
Sage Creek Basin 7850 6.1 8.8 69 7.2 10.1 71
Sandstone RS 8150 5.4 8.3 65 5.5 12.3 45
Whiskey Park 8950 14.3 16.8 85 16.9 18.4 92
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Basin Index (%) 75 76
UPPER GREEN RIVER
Big Sandy Opening 9080 8.7 8.5 102 8.7 8.6 101
Blind Bull Sum 8650 23.2 14.5 160 14.0 13.2 106
East Rim Divide 7930 8.2 6.9 119 8.1 7.9 103
Elkhart Park G.S. 9400 8.5 7.7 110 7.9 8.7 91
Gros Ventre Summit 8750 9.8 8.6 114 9.3 8.4 111
Gunsight Pass 9820 10.8 8.5 127 11.0 9.2 120
Kendall R.S. 7740 9.9 7.8 127 10.6 9.5 112
Loomis Park 8240 11.2 9.8 114 12.1 11.6 104
New Fork Lake 8340 8.2 6.8 121 7.2 7.3 99
Pocket Creek 9360 6.2 -M * 6.0 -M *
Snider Basin 8060 8.5 7.9 108 10.1 9.5 106
Spring Creek Divide 9000 17.6 15.1 117 17.0 15.9 107
Triple Peak 8500 19.3 13.5 143 21.3 16.5 129
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Basin Index (%) 124 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.8 -M * 6.0 -M *
Buck Pasture 9632 7.4 -M * 8.1 -M *
EF Blacks Fork GS 9360 5.4 -M * 4.3 -M *
Hams Fork 7840 5.6 7.4 76 6.0 7.5 80
Hewinta 9500 5.0 6.1 82 7.4 8.9 83
Hickerson Park 9122 4.4 3.9 113 4.2 6.3 67
Hole-in-Rock 9168 3.9 4.1 95 4.5 5.9 76
Indian Creek 9425 13.7 14.8 93 10.2 14.5 70
Kelley R.S. 8180 8.3 9.3 89 9.3 11.9 78
Spirit Lk 10235 5.0 -M * 5.8 -M *
Steel Creek Park 10158 7.8 9.0 87 8.7 10.3 84
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Basin Index (%) 89 77
UPPER BEAR RIVER
Bear River RS 8777 5.5 -M * 7.1 -M *
Bug Lake 7987 9.6 11.6 83 10.4 12.8 81
Burts Miller Ranch 8000 4.0 -M * 4.6 -M *
Chalk Creek #1 9171 9.1 13.5 67 10.0 16.1 62
Hayden Fork 9130 7.6 8.9 85 9.8 13.5 73
Kelley R.S. 8180 8.3 9.3 89 9.3 11.9 78
Lily Lake 9133 6.8 7.6 89 7.2 11.0 65
Monte Cristo 8932 12.4 16.2 77 12.6 16.8 75
Salt River Summit 7640 6.7 8.2 82 8.5 10.9 78
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Basin Index (%) 80 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.