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 SUNDAY: FEBRUARY 4 , 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 12.6 10.9 116 14.1 14.3 99
Black Bear 8170 27.6 23.5 117 26.5 25.4 104
Blind Bull Sum 8650 21.9 14.3 153 13.4 13.2 102
Cottonwood Creek 7670 14.1 13.4 105 16.2 16.3 99
East Rim Divide 7930 7.8 6.9 113 7.8 7.9 99
Grand Targhee 9260 32.8 24.0 137 20.7 21.1 98
Granite Creek 6770 11.4 10.9 105 14.0 13.9 101
Grassy Lake 7265 20.3 20.9 97 23.9 24.5 98
Gros Ventre Summit 8750 9.8 8.6 114 9.2 8.4 110
Gunsight Pass 9820 10.2 8.4 121 10.4 9.1 114
Lewis Lake Divide 7850 24.0 20.3 118 26.2 23.6 111
Phillips Bench 8200 15.3 16.0 96 16.5 18.7 88
Salt River Summit 7640 6.5 8.1 80 8.4 10.9 77
Snake River Station 6920 12.5 11.3 111 16.9 15.8 107
Spring Creek Divide 9000 17.0 14.9 114 16.4 15.8 104
Thumb Divide 7980 12.4 9.6 129 13.1 12.4 106
Togwotee Pass 9580 20.5 15.2 135 21.0 16.2 130
Two Ocean Plateau 9240 26.2 18.2 144 19.3 17.7 109
Willow Creek 8080 20.3 17.7 115 23.0 22.2 104
Younts Peak 8350 -M 9.9 * -M 10.7 *
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Basin Index (%) 118 103
MADISON-GALLATIN
Black Bear 8170 27.6 23.5 117 26.5 25.4 104
Canyon 7870 11.4 8.4 136 13.2 11.0 120
Madison Plateau 7750 17.0 14.2 120 17.8 17.7 101
West Yellowstone 6700 8.7 7.1 123 11.4 9.9 115
Whiskey Creek 6800 10.3 9.7 106 12.1 13.5 90
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Basin Index (%) 119 105
YELLOWSTONE
Beartooth Lake 9360 26.2 14.2 185 23.9 13.2 181
Burnt Mtn 5880 3.6 2.5 144 9.2 8.1 114
Canyon 7870 11.4 8.4 136 13.2 11.0 120
Cole Creek 7850 9.4 8.6 109 6.0 7.8 77
Evening Star 9200 27.0 16.6 163 28.7 18.4 156
Fisher Creek 9100 35.3 21.1 167 30.0 21.3 141
Northeast Entrance 7350 8.2 6.6 124 11.8 8.5 139
Parker Peak 9400 22.7 13.3 171 19.7 11.6 170
Sylvan Lake 8420 16.1 13.3 121 18.1 15.2 119
Thumb Divide 7980 12.4 9.6 129 13.1 12.4 106
Two Ocean Plateau 9240 26.2 18.2 144 19.3 17.7 109
White Mill 8700 27.3 15.0 182 19.8 15.8 125
Wolverine 7650 12.7 7.2 176 14.7 8.4 175
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Basin Index (%) 154 134
WIND RIVER
Burroughs Creek 8750 10.3 -M * 12.2 -M *
Castle Creek 8400 5.8 -M * 7.2 -M *
Cold Springs 9630 6.4 4.7 136 6.7 6.3 106
Deer Park 9700 7.5 9.5 79 9.5 12.6 75
Hobbs Park 10100 11.2 8.0 140 9.5 8.0 119
Kirwin 9550 13.2 6.0 220 11.8 7.4 159
Little Warm 9370 11.0 6.5 169 11.1 8.4 132
Owl Creek 8975 2.9 3.1 94 4.6 3.6 128
South Pass 9040 7.5 9.5 79 5.3 11.2 47
St. Lawrence Alt 8620 2.6 4.2 62 6.1 5.4 113
Togwotee Pass 9580 20.5 15.2 135 21.0 16.2 130
Townsend Creek 8700 5.0 5.4 93 6.3 7.2 88
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Basin Index (%) 122 106
BIGHORN BASIN
Bald Mtn. 9380 13.4 11.0 122 8.8 10.9 81
Bear Trap Meadow 8200 5.7 3.5 163 6.5 5.2 125
Bone Springs Div 9350 11.8 9.9 119 8.9 9.8 91
Grave Springs 8550 4.4 5.0 88 3.7 6.6 56
Kirwin 9550 13.2 6.0 220 11.8 7.4 159
Marquette 8760 3.9 -M * 7.5 -M *
Middle Powder 7760 5.7 6.4 89 -M 7.6 *
Owl Creek 8975 2.9 3.1 94 4.6 3.6 128
Powder River Pass 9480 -M 6.7 * -M 8.0 *
Shell Creek 9580 14.0 9.2 152 10.1 9.1 111
Timber Creek 7950 2.4 3.0 80 -M 4.6 *
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Basin Index (%) 129 103
SHOSHONE RIVER
Blackwater 9780 23.7 14.9 159 21.6 13.5 160
Evening Star 9200 27.0 16.6 163 28.7 18.4 156
Marquette 8760 3.9 -M * 7.5 -M *
Sylvan Road 7120 10.0 7.9 127 14.4 12.1 119
Younts Peak 8350 -M 9.9 * -M 10.7 *
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Basin Index (%) 154 147
POWDER RIVER
Bear Trap Meadow 8200 5.7 3.5 163 6.5 5.2 125
Cloud Peak Reservoir 9860 10.0 8.5 118 8.9 8.0 111
Grave Springs 8550 4.4 5.0 88 3.7 6.6 56
Hansen Sawmill 8360 4.7 4.0 118 6.1 5.2 117
Middle Powder 7760 5.7 6.4 89 -M 7.6 *
Powder River Pass 9480 -M 6.7 * -M 8.0 *
Soldier Park 8720 3.1 -M * 6.0 -M *
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Basin Index (%) 111 101
TONGUE RIVER
Big Goose 7990 4.3 5.0 86 4.8 6.7 72
Bone Springs Div 9350 11.8 9.9 119 8.9 9.8 91
Burgess Junction 7880 5.4 6.8 79 4.4 7.6 58
Dome Lake 8880 8.1 7.0 116 6.8 8.6 79
Little Goose 8870 5.4 -M * 7.3 -M *
Sucker Creek 8880 6.1 7.2 85 -M 8.9 *
Tie Creek 6870 2.1 3.4 62 -M 7.2 *
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Basin Index (%) 96 76
BELLE FOURCHE
Cole Canyon 5910 4.1 3.3 124 5.6 5.8 97
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Basin Index (%) 124 97
CHEYENNE RIVER BASIN
Blind Park 6890 4.9 4.9 100 7.0 7.9 89
North Rapid Creek 6130 4.8 4.4 109 4.9 6.4 77
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Basin Index (%) 104 83
UPPER N. PLATTE
Arapaho Ridge 10960 -M 13.5 * -M 14.5 *
Blackhall Mtn 9820 16.7 -M * 16.9 -M *
Columbine 9160 12.9 15.0 86 15.3 16.8 91
Divide Peak 8880 8.7 12.7 69 12.1 14.0 86
Joe Wright 10120 10.3 13.2 78 18.4 16.4 112
Laprele Creek 8375 4.3 5.5 78 5.8 7.7 75
Med Bow 10500 27.4 -M * 23.2 -M *
North French Creek 10130 18.1 16.3 111 18.4 17.3 106
Never Summer 10280 11.4 12.9 88 9.6 -M *
Old Battle 10000 15.8 19.6 81 15.5 22.9 68
Rawah 9020 6.8 6.4 106 10.1 9.2 110
Sage Creek Basin 7850 6.0 8.7 69 7.3 10.0 73
Sand Lake 10050 17.3 16.8 103 14.1 15.4 92
South Brush Creek 8440 6.6 7.5 88 8.0 9.7 82
Tower 10500 20.0 28.2 71 20.7 26.1 79
Webber Springs 9250 11.5 14.4 80 13.7 17.4 79
Willow Creek Pass 9540 8.3 7.9 105 9.2 8.4 110
Zirkel 9340 14.6 19.0 77 19.3 19.6 98
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Basin Index (%) 85 89
SWEETWATER
Deer Park 9700 7.5 9.5 79 9.5 12.6 75
Larsen Creek 9000 5.6 7.5 75 7.6 -M *
South Pass 9040 7.5 9.5 79 5.3 11.2 47
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Basin Index (%) 78 62
LOWER N. PLATTE
Casper Mtn. 7900 5.2 7.7 68 -M 9.2 *
Laprele Creek 8375 4.3 5.5 78 5.8 7.7 75
Reno Hill 8400 6.6 7.8 85 7.6 9.2 83
Windy Peak 7900 4.1 4.3 95 5.6 6.5 86
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Basin Index (%) 80 81
LARAMIE RIVER
Brooklyn Lake 10240 16.1 12.1 133 16.7 13.2 127
Cinnabar Park 9574 -M 13.5 * -M 16.5 *
Crow Creek 8330 1.9 5.7 33 7.5 6.5 115
Deadman Hill 10220 12.6 10.4 121 12.3 10.5 117
Rawah 9020 6.8 6.4 106 10.1 9.2 110
Roach 9700 9.1 10.2 89 11.7 12.1 97
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Basin Index (%) 104 113
S. PLATTE
Black Mountain 8920 6.0 -M * 8.6 -M *
Crow Creek 8330 1.9 5.7 33 7.5 6.5 115
Deadman Hill 10220 12.6 10.4 121 12.3 10.5 117
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Basin Index (%) 90 116
LITTLE SNAKE RIVER
Battle Mountain 7440 3.3 7.2 46 6.6 9.9 67
Divide Peak 8880 8.7 12.7 69 12.1 14.0 86
Elk River 8700 8.7 11.7 74 10.0 13.1 76
Little Snake River 8915 12.7 16.0 79 17.9 21.3 84
Old Battle 10000 15.8 19.6 81 15.5 22.9 68
Sage Creek Basin 7850 6.0 8.7 69 7.3 10.0 73
Sandstone RS 8150 5.2 8.3 63 5.5 12.3 45
Whiskey Park 8950 13.7 16.6 83 16.4 18.3 90
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Basin Index (%) 74 75
UPPER GREEN RIVER
Big Sandy Opening 9080 8.5 8.5 100 8.6 8.5 101
Blind Bull Sum 8650 21.9 14.3 153 13.4 13.2 102
East Rim Divide 7930 7.8 6.9 113 7.8 7.9 99
Elkhart Park G.S. 9400 8.0 7.7 104 7.7 8.7 89
Gros Ventre Summit 8750 9.8 8.6 114 9.2 8.4 110
Gunsight Pass 9820 10.2 8.4 121 10.4 9.1 114
Kendall R.S. 7740 9.5 7.8 122 10.2 9.5 107
Loomis Park 8240 10.8 9.8 110 11.6 11.6 100
New Fork Lake 8340 7.8 6.8 115 6.9 7.2 96
Pocket Creek 9360 6.3 -M * 5.9 -M *
Snider Basin 8060 8.1 7.8 104 9.7 9.5 102
Spring Creek Divide 9000 17.0 14.9 114 16.4 15.8 104
Triple Peak 8500 18.2 13.5 135 20.1 16.5 122
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Basin Index (%) 120 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.7 -M * 5.9 -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 5.3 -M * 4.3 -M *
Hams Fork 7840 5.5 7.4 74 5.9 7.4 80
Hewinta 9500 5.1 6.0 85 7.4 8.9 83
Hickerson Park 9122 4.5 3.9 115 4.1 6.3 65
Hole-in-Rock 9168 3.9 4.1 95 4.5 5.9 76
Indian Creek 9425 13.3 14.8 90 10.0 14.4 69
Kelley R.S. 8180 8.1 9.2 88 9.2 11.8 78
Spirit Lk 10235 5.0 -M * 5.9 -M *
Steel Creek Park 10158 8.0 8.9 90 8.7 10.2 85
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Basin Index (%) 89 77
UPPER BEAR RIVER
Bear River RS 8777 5.5 -M * 6.9 -M *
Bug Lake 7987 9.5 11.4 83 10.3 12.7 81
Burts Miller Ranch 8000 3.8 -M * 4.6 -M *
Chalk Creek #1 9171 9.1 13.4 68 9.9 16.0 62
Hayden Fork 9130 7.6 8.8 86 9.7 13.5 72
Kelley R.S. 8180 8.1 9.2 88 9.2 11.8 78
Lily Lake 9133 6.8 7.5 91 7.2 11.0 65
Monte Cristo 8932 12.2 16.1 76 12.5 16.7 75
Salt River Summit 7640 6.5 8.1 80 8.4 10.9 77
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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.