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: MARCH 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 16.6 13.7 121 17.9 17.6 102
Black Bear 8170 37.6 30.3 124 34.8 31.8 109
Blind Bull Sum 8650 27.6 18.5 149 16.9 16.4 103
Cottonwood Creek 7670 18.6 17.6 106 20.2 20.1 100
East Rim Divide 7930 10.3 8.7 118 10.1 9.8 103
Grand Targhee 9260 40.2 30.8 131 25.7 25.3 102
Granite Creek 6770 15.6 14.1 111 17.5 16.9 104
Grassy Lake 7265 27.9 26.7 104 31.0 30.2 103
Gros Ventre Summit 8750 11.4 10.3 111 11.8 10.4 113
Gunsight Pass 9820 13.2 10.9 121 13.0 11.1 117
Lewis Lake Divide 7850 34.0 25.5 133 -M 29.7 *
Phillips Bench 8200 21.8 20.2 108 22.6 23.4 97
Salt River Summit 7640 9.0 10.8 83 10.5 13.8 76
Snake River Station 6920 16.7 14.5 115 20.7 19.1 108
Spring Creek Divide 9000 22.0 19.1 115 20.8 19.7 106
Thumb Divide 7980 16.5 12.5 132 16.5 15.1 109
Togwotee Pass 9580 27.0 18.6 145 27.3 19.9 137
Two Ocean Plateau 9240 32.9 21.9 150 -M 22.3 *
Willow Creek 8080 27.2 23.1 118 29.4 27.5 107
Younts Peak 8350 -M 11.9 * -M 12.9 *
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Basin Index (%) 123 106
MADISON-GALLATIN
Black Bear 8170 37.6 30.3 124 34.8 31.8 109
Canyon 7870 15.6 10.9 143 17.4 13.4 130
Madison Plateau 7750 24.1 18.2 132 23.6 21.9 108
West Yellowstone 6700 12.3 9.1 135 15.3 11.9 129
Whiskey Creek 6800 14.6 12.3 119 16.8 16.7 101
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Basin Index (%) 129 113
YELLOWSTONE
Beartooth Lake 9360 35.0 17.5 200 30.6 16.1 190
Burnt Mtn 5880 -M 4.2 * 12.9 9.7 133
Canyon 7870 15.6 10.9 143 17.4 13.4 130
Cole Creek 7850 12.4 10.5 118 7.9 9.3 85
Evening Star 9200 35.6 19.8 180 31.0 22.6 137
Fisher Creek 9100 46.1 26.2 176 40.3 26.2 154
Northeast Entrance 7350 13.2 8.5 155 16.0 10.1 158
Parker Peak 9400 29.5 16.3 181 22.7 14.4 158
Sylvan Lake 8420 21.8 16.3 134 23.4 18.4 127
Thumb Divide 7980 16.5 12.5 132 16.5 15.1 109
Two Ocean Plateau 9240 32.9 21.9 150 -M 22.3 *
White Mill 8700 36.7 18.7 196 27.4 19.5 141
Wolverine 7650 19.6 8.7 225 18.6 10.2 182
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Basin Index (%) 168 143
WIND RIVER
Burroughs Creek 8750 14.4 -M * 16.0 -M *
Castle Creek 8400 7.7 -M * 8.9 -M *
Cold Springs 9630 8.1 5.6 145 8.5 7.7 110
Deer Park 9700 9.3 11.1 84 11.9 15.6 76
Hobbs Park 10100 13.6 10.2 133 11.6 9.8 118
Kirwin 9550 17.1 7.3 234 15.5 9.0 172
Little Warm 9370 13.3 8.2 162 13.8 10.1 137
Owl Creek 8975 3.5 4.0 88 5.2 4.4 118
South Pass 9040 9.3 11.9 78 -M 13.9 *
St. Lawrence Alt 8620 2.7 5.5 49 7.0 6.7 104
Togwotee Pass 9580 27.0 18.6 145 27.3 19.9 137
Townsend Creek 8700 5.8 6.9 84 7.1 9.0 79
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Basin Index (%) 123 117
BIGHORN BASIN
Bald Mtn. 9380 17.5 15.3 114 12.1 13.4 90
Bear Trap Meadow 8200 7.7 4.5 171 8.5 6.3 135
Bone Springs Div 9350 15.6 12.7 123 11.6 12.0 97
Grave Springs 8550 5.4 7.1 76 4.4 8.1 54
Kirwin 9550 17.1 7.3 234 15.5 9.0 172
Marquette 8760 4.8 -M * 8.6 -M *
Middle Powder 7760 7.0 8.4 83 -M 9.0 *
Owl Creek 8975 3.5 4.0 88 5.2 4.4 118
Powder River Pass 9480 14.2 8.1 175 12.9 9.8 132
Shell Creek 9580 17.6 12.0 147 13.3 10.8 123
Timber Creek 7950 2.8 3.9 72 -M 5.4 *
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Basin Index (%) 130 113
SHOSHONE RIVER
Blackwater 9780 30.3 17.9 169 28.0 16.5 170
Evening Star 9200 35.6 19.8 180 31.0 22.6 137
Marquette 8760 4.8 -M * 8.6 -M *
Sylvan Road 7120 13.4 9.8 137 19.1 14.2 135
Younts Peak 8350 -M 11.9 * -M 12.9 *
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Basin Index (%) 167 147
POWDER RIVER
Bear Trap Meadow 8200 7.7 4.5 171 8.5 6.3 135
Cloud Peak Reservoir 9860 12.7 10.8 118 11.1 9.8 113
Grave Springs 8550 5.4 7.1 76 4.4 8.1 54
Hansen Sawmill 8360 6.6 4.8 138 7.9 6.2 127
Middle Powder 7760 7.0 8.4 83 -M 9.0 *
Powder River Pass 9480 14.2 8.1 175 12.9 9.8 132
Soldier Park 8720 5.2 -M * 7.7 -M *
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Basin Index (%) 123 111
TONGUE RIVER
Big Goose 7990 5.9 6.4 92 6.5 8.0 81
Bone Springs Div 9350 15.6 12.7 123 11.6 12.0 97
Burgess Junction 7880 7.4 8.7 85 6.7 9.3 72
Dome Lake 8880 11.8 8.9 133 9.4 10.2 92
Little Goose 8870 7.2 -M * 9.2 -M *
Sucker Creek 8880 8.2 9.4 87 6.2 10.9 57
Tie Creek 6870 3.4 4.5 76 6.9 8.7 79
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Basin Index (%) 103 80
BELLE FOURCHE
Cole Canyon 5910 5.6 4.9 114 7.4 7.2 103
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Basin Index (%) 114 103
CHEYENNE RIVER BASIN
Blind Park 6890 6.8 6.5 105 9.3 9.6 97
North Rapid Creek 6130 6.4 6.0 107 6.7 7.8 86
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Basin Index (%) 106 92
UPPER N. PLATTE
Arapaho Ridge 10960 16.1 17.1 94 15.8 18.1 87
Blackhall Mtn 9820 22.5 -M * 21.9 -M *
Columbine 9160 18.8 20.4 92 18.8 20.7 91
Divide Peak 8880 11.4 16.4 70 15.0 17.2 87
Joe Wright 10120 13.3 17.4 76 22.3 20.5 109
Laprele Creek 8375 5.4 7.9 68 6.9 9.6 72
Med Bow 10500 33.1 -M * 27.5 -M *
North French Creek 10130 22.2 21.4 104 21.9 21.4 102
Never Summer 10280 14.5 16.4 88 11.7 -M *
Old Battle 10000 21.0 24.5 86 20.1 28.5 71
Rawah 9020 9.0 8.9 101 12.0 11.2 107
Sage Creek Basin 7850 7.6 10.8 70 8.5 12.0 71
Sand Lake 10050 21.6 21.5 100 17.9 19.4 92
South Brush Creek 8440 8.4 10.7 79 9.6 12.0 80
Tower 10500 27.9 37.2 75 25.1 32.7 77
Webber Springs 9250 15.9 19.2 83 18.3 21.6 85
Willow Creek Pass 9540 10.6 9.8 108 11.2 10.6 106
Zirkel 9340 22.3 23.9 93 26.0 23.6 110
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Basin Index (%) 87 89
SWEETWATER
Deer Park 9700 9.3 11.1 84 11.9 15.6 76
Larsen Creek 9000 9.2 9.8 94 9.4 -M *
South Pass 9040 9.3 11.9 78 -M 13.9 *
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Basin Index (%) 85 76*
LOWER N. PLATTE
Casper Mtn. 7900 6.3 10.7 59 5.2 11.4 46
Laprele Creek 8375 5.4 7.9 68 6.9 9.6 72
Reno Hill 8400 7.8 10.7 73 8.7 11.4 76
Windy Peak 7900 5.0 6.0 83 6.6 8.0 82
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Basin Index (%) 69 68
LARAMIE RIVER
Brooklyn Lake 10240 20.0 15.7 127 20.4 16.5 124
Cinnabar Park 9574 18.5 17.5 106 21.0 19.9 106
Crow Creek 8330 2.4 6.9 35 8.1 8.0 101
Deadman Hill 10220 16.0 12.6 127 15.3 13.2 116
Rawah 9020 9.0 8.9 101 12.0 11.2 107
Roach 9700 11.3 12.7 89 14.2 15.1 94
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Basin Index (%) 104 108
S. PLATTE
Black Mountain 8920 7.4 -M * 10.1 -M *
Crow Creek 8330 2.4 6.9 35 8.1 8.0 101
Deadman Hill 10220 16.0 12.6 127 15.3 13.2 116
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Basin Index (%) 94 110
LITTLE SNAKE RIVER
Battle Mountain 7440 5.7 10.1 56 7.1 12.3 58
Divide Peak 8880 11.4 16.4 70 15.0 17.2 87
Elk River 8700 12.5 16.2 77 13.3 16.3 82
Little Snake River 8915 17.9 20.0 90 23.2 25.2 92
Old Battle 10000 21.0 24.5 86 20.1 28.5 71
Sage Creek Basin 7850 7.6 10.8 70 8.5 12.0 71
Sandstone RS 8150 7.4 11.1 67 6.9 15.4 45
Whiskey Park 8950 19.7 22.2 89 20.8 22.8 91
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Basin Index (%) 79 77
UPPER GREEN RIVER
Big Sandy Opening 9080 10.4 10.4 100 10.4 10.8 96
Blind Bull Sum 8650 27.6 18.5 149 16.9 16.4 103
East Rim Divide 7930 10.3 8.7 118 10.1 9.8 103
Elkhart Park G.S. 9400 10.2 9.7 105 9.8 10.8 91
Gros Ventre Summit 8750 11.4 10.3 111 11.8 10.4 113
Gunsight Pass 9820 13.2 10.9 121 13.0 11.1 117
Kendall R.S. 7740 12.7 10.0 127 13.1 12.0 109
Loomis Park 8240 14.7 12.2 120 15.4 14.4 107
New Fork Lake 8340 10.1 8.4 120 9.2 8.9 103
Pocket Creek 9360 7.1 -M * 7.0 -M *
Snider Basin 8060 11.2 10.1 111 12.9 11.8 109
Spring Creek Divide 9000 22.0 19.1 115 20.8 19.7 106
Triple Peak 8500 24.3 17.6 138 26.4 20.8 127
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Basin Index (%) 122 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.9 -M * 7.3 -M *
Buck Pasture 9632 9.1 -M * 10.1 -M *
EF Blacks Fork GS 9360 9.2 -M * 4.6 -M *
Hams Fork 7840 8.0 9.6 83 7.8 9.4 83
Hewinta 9500 6.6 8.2 80 9.1 11.1 82
Hickerson Park 9122 5.9 6.1 97 5.3 7.8 68
Hole-in-Rock 9168 5.1 5.8 88 5.6 7.3 77
Indian Creek 9425 17.3 19.4 89 12.9 18.4 70
Kelley R.S. 8180 10.9 12.3 89 12.1 14.9 81
Spirit Lk 10235 6.1 -M * 7.6 -M *
Steel Creek Park 10158 10.7 12.0 89 10.5 12.8 82
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Basin Index (%) 88 77
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 8.5 -M *
Bug Lake 7987 13.1 15.3 86 13.5 15.9 85
Burts Miller Ranch 8000 4.2 -M * 5.2 -M *
Chalk Creek #1 9171 11.5 18.8 61 12.8 20.1 64
Hayden Fork 9130 9.8 12.4 79 12.4 16.8 74
Kelley R.S. 8180 10.9 12.3 89 12.1 14.9 81
Lily Lake 9133 7.1 10.6 67 9.0 13.6 66
Monte Cristo 8932 16.5 21.9 75 16.0 21.0 76
Salt River Summit 7640 9.0 10.8 83 10.5 13.8 76
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Basin Index (%) 76 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.