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 TUESDAY: MARCH 6 , 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 18.0 17.8 101
Black Bear 8170 37.8 30.5 124 34.9 32.0 109
Blind Bull Sum 8650 27.8 18.7 149 16.8 16.5 102
Cottonwood Creek 7670 18.9 17.9 106 20.6 20.2 102
East Rim Divide 7930 10.3 8.8 117 10.1 9.9 102
Grand Targhee 9260 40.3 31.0 130 25.8 25.3 102
Granite Creek 6770 15.7 14.2 111 17.6 17.1 103
Grassy Lake 7265 28.0 26.9 104 31.1 30.4 102
Gros Ventre Summit 8750 11.3 10.4 109 11.7 10.5 111
Gunsight Pass 9820 13.2 11.1 119 13.0 11.1 117
Lewis Lake Divide 7850 34.2 25.7 133 -M 29.9 *
Phillips Bench 8200 21.9 20.4 107 22.7 23.5 97
Salt River Summit 7640 9.2 10.9 84 10.5 13.9 76
Snake River Station 6920 16.8 14.7 114 20.8 19.2 108
Spring Creek Divide 9000 22.3 19.3 116 21.0 19.9 106
Thumb Divide 7980 16.5 12.6 131 16.6 15.3 108
Togwotee Pass 9580 27.2 18.8 145 27.5 20.0 138
Two Ocean Plateau 9240 33.0 22.1 149 20.4 22.5 91
Willow Creek 8080 27.7 23.4 118 29.8 27.7 108
Younts Peak 8350 -M 12.0 * -M 13.0 *
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Basin Index (%) 122 105
MADISON-GALLATIN
Black Bear 8170 37.8 30.5 124 34.9 32.0 109
Canyon 7870 15.6 11.1 141 17.5 13.5 130
Madison Plateau 7750 24.2 18.4 132 23.6 22.1 107
West Yellowstone 6700 12.3 9.2 134 15.3 12.0 128
Whiskey Creek 6800 14.6 12.5 117 16.9 16.9 100
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Basin Index (%) 128 112
YELLOWSTONE
Beartooth Lake 9360 35.2 17.7 199 30.7 16.3 188
Burnt Mtn 5880 -M 4.3 * 12.9 9.8 132
Canyon 7870 15.6 11.1 141 17.5 13.5 130
Cole Creek 7850 12.5 10.7 117 8.0 9.4 85
Evening Star 9200 35.7 20.1 178 -M 22.8 *
Fisher Creek 9100 46.4 26.3 176 40.4 26.4 153
Northeast Entrance 7350 13.3 8.5 156 16.1 10.2 158
Parker Peak 9400 29.6 16.3 182 22.7 14.5 157
Sylvan Lake 8420 21.9 16.4 134 23.4 18.5 126
Thumb Divide 7980 16.5 12.6 131 16.6 15.3 108
Two Ocean Plateau 9240 33.0 22.1 149 20.4 22.5 91
White Mill 8700 36.9 18.8 196 27.6 19.7 140
Wolverine 7650 19.7 8.8 224 18.7 10.2 183
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Basin Index (%) 167 137
WIND RIVER
Burroughs Creek 8750 14.4 -M * 16.1 -M *
Castle Creek 8400 7.7 -M * 8.9 -M *
Cold Springs 9630 8.0 5.7 140 8.4 7.8 108
Deer Park 9700 9.2 11.2 82 11.8 15.6 76
Hobbs Park 10100 13.5 10.4 130 11.6 10.0 116
Kirwin 9550 17.1 7.4 231 15.6 9.1 171
Little Warm 9370 13.3 8.3 160 13.9 10.2 136
Owl Creek 8975 3.5 4.1 85 5.2 4.4 118
South Pass 9040 9.3 12.0 78 -M 14.0 *
St. Lawrence Alt 8620 2.6 5.6 46 7.0 6.8 103
Togwotee Pass 9580 27.2 18.8 145 27.5 20.0 138
Townsend Creek 8700 5.8 7.1 82 6.8 9.0 76
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Basin Index (%) 121 116
BIGHORN BASIN
Bald Mtn. 9380 17.9 15.5 115 12.3 13.5 91
Bear Trap Meadow 8200 7.9 4.6 172 8.5 6.4 133
Bone Springs Div 9350 15.9 12.9 123 11.8 12.2 97
Grave Springs 8550 5.4 7.1 76 4.4 8.2 54
Kirwin 9550 17.1 7.4 231 15.6 9.1 171
Marquette 8760 4.8 -M * 8.5 -M *
Middle Powder 7760 7.1 8.4 85 -M 9.0 *
Owl Creek 8975 3.5 4.1 85 5.2 4.4 118
Powder River Pass 9480 14.4 8.2 176 12.9 9.9 130
Shell Creek 9580 17.7 12.0 148 13.4 10.9 123
Timber Creek 7950 2.8 3.9 72 -M 5.4 *
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Basin Index (%) 130 113
SHOSHONE RIVER
Blackwater 9780 30.4 18.1 168 28.1 16.6 169
Evening Star 9200 35.7 20.1 178 -M 22.8 *
Marquette 8760 4.8 -M * 8.5 -M *
Sylvan Road 7120 13.3 9.8 136 19.2 14.3 134
Younts Peak 8350 -M 12.0 * -M 13.0 *
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Basin Index (%) 165 153*
POWDER RIVER
Bear Trap Meadow 8200 7.9 4.6 172 8.5 6.4 133
Cloud Peak Reservoir 9860 12.7 11.0 115 11.2 9.9 113
Grave Springs 8550 5.4 7.1 76 4.4 8.2 54
Hansen Sawmill 8360 6.5 4.8 135 7.9 6.3 125
Middle Powder 7760 7.1 8.4 85 -M 9.0 *
Powder River Pass 9480 14.4 8.2 176 12.9 9.9 130
Soldier Park 8720 5.2 -M * 7.7 -M *
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Basin Index (%) 122 110
TONGUE RIVER
Big Goose 7990 6.0 6.5 92 6.5 8.1 80
Bone Springs Div 9350 15.9 12.9 123 11.8 12.2 97
Burgess Junction 7880 7.5 8.8 85 6.7 9.4 71
Dome Lake 8880 12.0 9.0 133 9.4 10.2 92
Little Goose 8870 7.3 -M * 9.3 -M *
Sucker Creek 8880 8.3 9.5 87 6.2 10.9 57
Tie Creek 6870 3.5 4.6 76 7.1 8.7 82
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Basin Index (%) 104 80
BELLE FOURCHE
Cole Canyon 5910 5.6 4.9 114 7.4 7.3 101
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Basin Index (%) 114 101
CHEYENNE RIVER BASIN
Blind Park 6890 6.6 6.5 102 9.4 9.7 97
North Rapid Creek 6130 6.3 6.1 103 6.8 7.8 87
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Basin Index (%) 102 93
UPPER N. PLATTE
Arapaho Ridge 10960 16.4 17.2 95 16.0 18.2 88
Blackhall Mtn 9820 22.9 -M * 22.3 -M *
Columbine 9160 19.2 20.5 94 18.9 20.9 90
Divide Peak 8880 11.4 16.5 69 15.0 17.4 86
Joe Wright 10120 13.1 17.6 74 22.3 20.7 108
Laprele Creek 8375 5.4 7.9 68 6.8 9.7 70
Med Bow 10500 33.7 -M * 27.6 -M *
North French Creek 10130 22.3 21.6 103 22.0 21.6 102
Never Summer 10280 14.6 16.5 88 11.7 -M *
Old Battle 10000 21.3 24.7 86 20.4 28.8 71
Rawah 9020 9.1 9.0 101 12.0 11.2 107
Sage Creek Basin 7850 7.6 10.9 70 8.5 12.1 70
Sand Lake 10050 21.7 21.7 100 18.2 19.6 93
South Brush Creek 8440 8.4 10.8 78 9.5 12.1 79
Tower 10500 28.3 37.4 76 25.0 32.9 76
Webber Springs 9250 16.2 19.4 84 18.6 21.9 85
Willow Creek Pass 9540 10.6 9.9 107 11.3 10.7 106
Zirkel 9340 22.7 24.2 94 26.3 23.8 111
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Basin Index (%) 87 89
SWEETWATER
Deer Park 9700 9.2 11.2 82 11.8 15.6 76
Larsen Creek 9000 9.2 9.9 93 9.4 -M *
South Pass 9040 9.3 12.0 78 -M 14.0 *
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Basin Index (%) 84 76*
LOWER N. PLATTE
Casper Mtn. 7900 6.3 10.9 58 5.0 11.5 43
Laprele Creek 8375 5.4 7.9 68 6.8 9.7 70
Reno Hill 8400 7.7 10.8 71 8.7 11.6 75
Windy Peak 7900 4.9 6.1 80 6.4 8.1 79
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Basin Index (%) 68 66
LARAMIE RIVER
Brooklyn Lake 10240 20.4 15.9 128 20.9 16.7 125
Cinnabar Park 9574 18.7 17.5 107 20.9 20.0 104
Crow Creek 8330 2.4 6.9 35 8.1 8.2 99
Deadman Hill 10220 16.0 12.7 126 15.3 13.4 114
Rawah 9020 9.1 9.0 101 12.0 11.2 107
Roach 9700 11.3 12.8 88 14.2 15.3 93
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Basin Index (%) 104 108
S. PLATTE
Black Mountain 8920 7.4 -M * 10.2 -M *
Crow Creek 8330 2.4 6.9 35 8.1 8.2 99
Deadman Hill 10220 16.0 12.7 126 15.3 13.4 114
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Basin Index (%) 94 108
LITTLE SNAKE RIVER
Battle Mountain 7440 5.7 10.1 56 7.3 12.5 58
Divide Peak 8880 11.4 16.5 69 15.0 17.4 86
Elk River 8700 12.7 16.3 78 13.4 16.5 81
Little Snake River 8915 18.2 20.0 91 23.5 25.4 93
Old Battle 10000 21.3 24.7 86 20.4 28.8 71
Sage Creek Basin 7850 7.6 10.9 70 8.5 12.1 70
Sandstone RS 8150 7.5 11.3 66 6.9 15.5 45
Whiskey Park 8950 20.1 22.4 90 20.9 23.1 90
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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 27.8 18.7 149 16.8 16.5 102
East Rim Divide 7930 10.3 8.8 117 10.1 9.9 102
Elkhart Park G.S. 9400 10.2 9.7 105 9.8 10.9 90
Gros Ventre Summit 8750 11.3 10.4 109 11.7 10.5 111
Gunsight Pass 9820 13.2 11.1 119 13.0 11.1 117
Kendall R.S. 7740 12.7 10.1 126 13.0 12.1 107
Loomis Park 8240 14.7 12.3 120 15.5 14.5 107
New Fork Lake 8340 10.1 8.6 117 9.3 9.1 102
Pocket Creek 9360 7.0 -M * 7.0 -M *
Snider Basin 8060 11.4 10.3 111 13.0 11.9 109
Spring Creek Divide 9000 22.3 19.3 116 21.0 19.9 106
Triple Peak 8500 24.7 17.8 139 26.7 20.9 128
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Basin Index (%) 121 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.7 -M * 7.3 -M *
Buck Pasture 9632 9.0 -M * 10.1 -M *
EF Blacks Fork GS 9360 9.1 -M * -M -M *
Hams Fork 7840 8.1 9.6 84 7.8 9.4 83
Hewinta 9500 6.5 8.3 78 9.0 11.2 80
Hickerson Park 9122 5.9 6.2 95 5.1 7.9 65
Hole-in-Rock 9168 5.0 5.8 86 5.5 7.4 74
Indian Creek 9425 17.5 19.5 90 13.0 18.4 71
Kelley R.S. 8180 10.9 12.4 88 12.2 15.0 81
Spirit Lk 10235 6.2 -M * 7.6 -M *
Steel Creek Park 10158 10.6 12.1 88 10.9 12.9 84
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Basin Index (%) 87 77
UPPER BEAR RIVER
Bear River RS 8777 7.3 -M * 8.4 -M *
Bug Lake 7987 13.1 15.4 85 13.3 16.0 83
Burts Miller Ranch 8000 4.0 -M * 5.1 -M *
Chalk Creek #1 9171 11.4 19.0 60 12.8 20.3 63
Hayden Fork 9130 9.9 12.5 79 12.4 17.0 73
Kelley R.S. 8180 10.9 12.4 88 12.2 15.0 81
Lily Lake 9133 7.1 10.7 66 9.0 13.8 65
Monte Cristo 8932 16.5 22.1 75 16.1 21.2 76
Salt River Summit 7640 9.2 10.9 84 10.5 13.9 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.