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 2 , 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 15.7 13.6 115 17.1 17.4 98
Black Bear 8170 36.1 29.7 122 33.8 31.0 109
Blind Bull Sum 8650 26.6 18.0 148 16.1 16.0 101
Cottonwood Creek 7670 17.6 17.1 103 19.3 19.7 98
East Rim Divide 7930 10.0 8.2 122 9.9 9.6 103
Grand Targhee 9260 36.9 30.3 122 24.1 25.0 96
Granite Creek 6770 15.0 13.8 109 17.0 16.6 102
Grassy Lake 7265 26.3 26.3 100 29.4 29.6 99
Gros Ventre Summit 8750 10.6 9.8 108 10.9 10.2 107
Gunsight Pass 9820 12.5 10.6 118 12.4 10.9 114
Lewis Lake Divide 7850 32.6 25.2 129 -M 29.0 *
Phillips Bench 8200 20.1 19.8 102 21.2 22.9 93
Salt River Summit 7640 8.4 10.7 79 10.3 13.5 76
Snake River Station 6920 15.8 14.3 110 20.1 18.7 107
Spring Creek Divide 9000 21.2 18.7 113 20.1 19.3 104
Thumb Divide 7980 15.5 12.3 126 15.6 14.7 106
Togwotee Pass 9580 25.0 17.9 140 25.6 19.5 131
Two Ocean Plateau 9240 31.6 21.6 146 -M 21.8 *
Willow Creek 8080 26.1 22.4 117 28.4 27.0 105
Younts Peak 8350 -M 11.7 * -M 12.7 *
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Basin Index (%) 119 103
MADISON-GALLATIN
Black Bear 8170 36.1 29.7 122 33.8 31.0 109
Canyon 7870 14.8 10.6 140 16.7 13.1 127
Madison Plateau 7750 23.1 17.9 129 22.6 21.3 106
West Yellowstone 6700 11.9 9.0 132 14.7 11.7 126
Whiskey Creek 6800 13.8 12.1 114 15.9 16.3 98
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Basin Index (%) 126 111
YELLOWSTONE
Beartooth Lake 9360 34.4 16.9 204 29.1 15.8 184
Burnt Mtn 5880 6.3 4.0 158 12.4 9.6 129
Canyon 7870 14.8 10.6 140 16.7 13.1 127
Cole Creek 7850 11.8 10.1 117 7.9 9.1 87
Evening Star 9200 34.9 19.2 182 31.0 22.2 140
Fisher Creek 9100 45.0 25.9 174 39.0 25.7 152
Northeast Entrance 7350 12.6 8.3 152 15.5 9.9 157
Parker Peak 9400 28.6 16.1 178 22.8 14.1 162
Sylvan Lake 8420 20.5 15.9 129 22.0 18.0 122
Thumb Divide 7980 15.5 12.3 126 15.6 14.7 106
Two Ocean Plateau 9240 31.6 21.6 146 -M 21.8 *
White Mill 8700 35.9 18.4 195 26.6 19.1 139
Wolverine 7650 18.8 8.5 221 18.1 10.0 181
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Basin Index (%) 165 142
WIND RIVER
Burroughs Creek 8750 13.9 -M * 15.9 -M *
Castle Creek 8400 7.4 -M * 8.6 -M *
Cold Springs 9630 7.7 5.5 140 8.4 7.5 112
Deer Park 9700 9.1 10.8 84 11.9 15.4 77
Hobbs Park 10100 13.7 9.8 140 11.8 9.5 124
Kirwin 9550 16.6 7.0 237 14.9 8.8 169
Little Warm 9370 12.9 8.0 161 13.5 9.9 136
Owl Creek 8975 3.4 3.9 87 5.2 4.3 121
South Pass 9040 9.2 11.5 80 -M 13.5 *
St. Lawrence Alt 8620 3.0 5.2 58 7.1 6.6 108
Togwotee Pass 9580 25.0 17.9 140 25.6 19.5 131
Townsend Creek 8700 6.0 6.6 91 7.3 8.7 84
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Basin Index (%) 124 117
BIGHORN BASIN
Bald Mtn. 9380 17.3 14.8 117 12.2 13.2 92
Bear Trap Meadow 8200 7.9 4.4 180 8.5 6.2 137
Bone Springs Div 9350 15.5 12.2 127 11.7 11.8 99
Grave Springs 8550 5.4 6.9 78 4.5 8.0 56
Kirwin 9550 16.6 7.0 237 14.9 8.8 169
Marquette 8760 4.4 -M * 8.0 -M *
Middle Powder 7760 6.9 8.1 85 -M 8.8 *
Owl Creek 8975 3.4 3.9 87 5.2 4.3 121
Powder River Pass 9480 14.1 8.0 176 12.9 9.6 134
Shell Creek 9580 17.5 11.7 150 13.4 10.7 125
Timber Creek 7950 2.7 3.8 71 -M 5.3 *
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Basin Index (%) 133 115
SHOSHONE RIVER
Blackwater 9780 28.8 17.3 166 26.8 16.2 165
Evening Star 9200 34.9 19.2 182 31.0 22.2 140
Marquette 8760 4.4 -M * 8.0 -M *
Sylvan Road 7120 12.6 9.5 133 18.2 13.9 131
Younts Peak 8350 -M 11.7 * -M 12.7 *
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Basin Index (%) 166 145
POWDER RIVER
Bear Trap Meadow 8200 7.9 4.4 180 8.5 6.2 137
Cloud Peak Reservoir 9860 12.8 10.4 123 11.3 9.6 118
Grave Springs 8550 5.4 6.9 78 4.5 8.0 56
Hansen Sawmill 8360 6.7 4.7 143 8.0 6.1 131
Middle Powder 7760 6.9 8.1 85 -M 8.8 *
Powder River Pass 9480 14.1 8.0 176 12.9 9.6 134
Soldier Park 8720 5.5 -M * 7.7 -M *
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Basin Index (%) 127 114
TONGUE RIVER
Big Goose 7990 6.1 6.2 98 6.6 7.9 84
Bone Springs Div 9350 15.5 12.2 127 11.7 11.8 99
Burgess Junction 7880 7.5 8.3 90 6.8 9.0 76
Dome Lake 8880 11.9 8.7 137 9.4 10.0 94
Little Goose 8870 7.3 -M * 9.4 -M *
Sucker Creek 8880 8.3 9.0 92 6.4 10.7 60
Tie Creek 6870 3.6 4.3 84 7.1 8.5 84
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Basin Index (%) 109 83
BELLE FOURCHE
Cole Canyon 5910 5.5 4.9 112 7.6 7.1 107
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Basin Index (%) 112 107
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 6.4 109 9.5 9.5 100
North Rapid Creek 6130 6.5 5.9 110 6.9 7.7 90
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Basin Index (%) 110 95
UPPER N. PLATTE
Arapaho Ridge 10960 16.0 16.8 95 15.8 17.8 89
Blackhall Mtn 9820 22.4 -M * 21.9 -M *
Columbine 9160 18.4 19.9 92 19.1 20.4 94
Divide Peak 8880 11.1 15.9 70 14.7 16.8 88
Joe Wright 10120 13.4 16.8 80 22.1 20.0 110
Laprele Creek 8375 5.4 7.8 69 6.9 9.3 74
Med Bow 10500 32.9 -M * 27.4 -M *
North French Creek 10130 21.9 21.1 104 21.7 21.1 103
Never Summer 10280 14.5 16.3 89 11.7 -M *
Old Battle 10000 20.7 24.1 86 20.0 28.0 71
Rawah 9020 8.9 8.8 101 12.2 11.0 111
Sage Creek Basin 7850 7.6 10.6 72 8.3 11.8 70
Sand Lake 10050 21.3 21.2 100 17.9 19.0 94
South Brush Creek 8440 8.1 10.3 79 9.6 11.8 81
Tower 10500 27.1 36.5 74 25.0 32.0 78
Webber Springs 9250 15.5 18.8 82 18.0 21.2 85
Willow Creek Pass 9540 10.6 9.6 110 11.3 10.4 109
Zirkel 9340 21.6 23.1 94 25.8 23.6 109
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Basin Index (%) 87 91
SWEETWATER
Deer Park 9700 9.1 10.8 84 11.9 15.4 77
Larsen Creek 9000 9.2 9.6 96 9.3 -M *
South Pass 9040 9.2 11.5 80 -M 13.5 *
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Basin Index (%) 86 77*
LOWER N. PLATTE
Casper Mtn. 7900 6.3 10.3 61 5.3 11.2 47
Laprele Creek 8375 5.4 7.8 69 6.9 9.3 74
Reno Hill 8400 7.8 10.2 76 8.8 11.1 79
Windy Peak 7900 5.1 5.8 88 6.6 7.8 85
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Basin Index (%) 72 70
LARAMIE RIVER
Brooklyn Lake 10240 19.8 15.1 131 20.3 16.1 126
Cinnabar Park 9574 18.4 17.2 107 20.7 19.8 105
Crow Creek 8330 2.5 6.7 37 8.2 7.8 105
Deadman Hill 10220 15.9 12.5 127 15.3 12.8 120
Rawah 9020 8.9 8.8 101 12.2 11.0 111
Roach 9700 11.3 12.5 90 14.3 14.7 97
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Basin Index (%) 105 111
S. PLATTE
Black Mountain 8920 7.6 -M * 10.2 -M *
Crow Creek 8330 2.5 6.7 37 8.2 7.8 105
Deadman Hill 10220 15.9 12.5 127 15.3 12.8 120
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Basin Index (%) 96 114
LITTLE SNAKE RIVER
Battle Mountain 7440 5.3 9.9 54 8.1 12.1 67
Divide Peak 8880 11.1 15.9 70 14.7 16.8 88
Elk River 8700 12.2 15.7 78 13.2 16.0 82
Little Snake River 8915 17.6 19.8 89 22.8 25.1 91
Old Battle 10000 20.7 24.1 86 20.0 28.0 71
Sage Creek Basin 7850 7.6 10.6 72 8.3 11.8 70
Sandstone RS 8150 7.3 10.5 70 6.9 15.1 46
Whiskey Park 8950 18.9 21.7 87 20.7 22.4 92
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Basin Index (%) 79 78
UPPER GREEN RIVER
Big Sandy Opening 9080 10.3 10.2 101 10.3 10.6 97
Blind Bull Sum 8650 26.6 18.0 148 16.1 16.0 101
East Rim Divide 7930 10.0 8.2 122 9.9 9.6 103
Elkhart Park G.S. 9400 9.9 9.5 104 9.5 10.6 90
Gros Ventre Summit 8750 10.6 9.8 108 10.9 10.2 107
Gunsight Pass 9820 12.5 10.6 118 12.4 10.9 114
Kendall R.S. 7740 12.6 9.8 129 13.0 11.7 111
Loomis Park 8240 14.4 11.8 122 15.1 14.1 107
New Fork Lake 8340 9.9 8.3 119 -M 8.8 *
Pocket Creek 9360 7.1 -M * 6.9 -M *
Snider Basin 8060 10.7 9.7 110 12.5 11.6 108
Spring Creek Divide 9000 21.2 18.7 113 20.1 19.3 104
Triple Peak 8500 23.3 17.0 137 25.3 20.3 125
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Basin Index (%) 121 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 -M * 7.1 -M *
Buck Pasture 9632 8.6 -M * 9.8 -M *
EF Blacks Fork GS 9360 7.3 -M * -M -M *
Hams Fork 7840 7.6 9.3 82 7.5 9.2 82
Hewinta 9500 6.2 8.0 78 8.9 10.9 82
Hickerson Park 9122 6.0 6.0 100 5.4 7.6 71
Hole-in-Rock 9168 5.1 5.6 91 5.7 7.1 80
Indian Creek 9425 16.8 19.0 88 12.4 17.9 69
Kelley R.S. 8180 10.3 12.2 84 11.6 14.6 79
Spirit Lk 10235 6.3 -M * 7.5 -M *
Steel Creek Park 10158 9.8 11.6 84 10.5 12.5 84
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Basin Index (%) 86 78
UPPER BEAR RIVER
Bear River RS 8777 6.9 -M * 8.4 -M *
Bug Lake 7987 12.5 14.9 84 12.9 15.5 83
Burts Miller Ranch 8000 4.1 -M * 5.2 -M *
Chalk Creek #1 9171 11.1 18.5 60 12.3 19.5 63
Hayden Fork 9130 9.4 12.2 77 12.0 16.4 73
Kelley R.S. 8180 10.3 12.2 84 11.6 14.6 79
Lily Lake 9133 8.0 10.4 77 9.0 13.3 68
Monte Cristo 8932 15.7 21.2 74 15.6 20.6 76
Salt River Summit 7640 8.4 10.7 79 10.3 13.5 76
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Basin Index (%) 75 74
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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.