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 26 , 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 17.6 14.6 121 19.7 19.5 101
Black Bear 8170 39.1 34.2 114 39.7 35.4 112
Blind Bull Sum 8650 31.3 21.2 148 18.7 18.2 103
Cottonwood Creek 7670 20.9 20.5 102 23.9 22.9 104
East Rim Divide 7930 11.6 9.7 120 11.5 11.0 105
Grand Targhee 9260 44.6 34.2 130 28.2 28.1 100
Granite Creek 6770 17.3 14.8 117 20.1 18.6 108
Grassy Lake 7265 30.8 30.5 101 33.8 33.6 101
Gros Ventre Summit 8750 14.3 12.1 118 13.6 11.9 114
Gunsight Pass 9820 15.4 12.7 121 14.9 12.6 118
Lewis Lake Divide 7850 37.3 28.8 130 36.8 33.1 111
Phillips Bench 8200 26.3 23.3 113 26.3 26.1 101
Salt River Summit 7640 10.8 12.4 87 12.3 15.5 79
Snake River Station 6920 18.0 15.7 115 22.7 21.0 108
Spring Creek Divide 9000 25.8 22.1 117 23.6 22.2 106
Thumb Divide 7980 18.6 14.9 125 18.0 17.1 105
Togwotee Pass 9580 30.3 21.2 143 30.4 22.4 136
Two Ocean Plateau 9240 35.6 24.8 144 28.0 25.2 111
Willow Creek 8080 32.3 25.8 125 33.4 31.0 108
Younts Peak 8350 -M 13.7 * -M 14.6 *
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Basin Index (%) 121 107
MADISON-GALLATIN
Black Bear 8170 39.1 34.2 114 39.7 35.4 112
Canyon 7870 16.5 12.0 138 18.8 15.0 125
Madison Plateau 7750 27.2 20.7 131 26.4 24.4 108
West Yellowstone 6700 13.4 10.1 133 16.9 13.0 130
Whiskey Creek 6800 16.3 14.5 112 18.7 18.7 100
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Basin Index (%) 123 113
YELLOWSTONE
Beartooth Lake 9360 36.6 20.3 180 33.0 18.2 181
Burnt Mtn 5880 6.7 4.7 143 13.1 11.2 117
Canyon 7870 16.5 12.0 138 18.8 15.0 125
Cole Creek 7850 13.0 12.7 102 -M 11.3 *
Evening Star 9200 37.9 23.3 163 40.9 25.2 162
Fisher Creek 9100 49.6 28.7 173 43.8 29.4 149
Northeast Entrance 7350 13.5 9.6 141 17.3 11.3 153
Parker Peak 9400 31.4 18.2 173 27.4 16.2 169
Sylvan Lake 8420 24.1 18.7 129 25.4 20.6 123
Thumb Divide 7980 18.6 14.9 125 18.0 17.1 105
Two Ocean Plateau 9240 35.6 24.8 144 28.0 25.2 111
White Mill 8700 38.8 20.9 186 29.9 21.9 137
Wolverine 7650 19.9 8.9 224 19.4 11.3 172
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Basin Index (%) 157 142
WIND RIVER
Burroughs Creek 8750 15.5 -M * 17.0 -M *
Castle Creek 8400 7.9 -M * 9.4 -M *
Cold Springs 9630 9.4 6.8 138 9.3 9.0 103
Deer Park 9700 11.8 14.1 84 14.4 17.7 81
Hobbs Park 10100 16.4 12.7 129 13.9 11.6 120
Kirwin 9550 18.8 8.8 214 16.9 10.4 162
Little Warm 9370 14.9 9.8 152 15.5 11.7 132
Owl Creek 8975 3.9 4.8 81 5.8 5.3 109
South Pass 9040 11.1 14.4 77 -M 15.9 *
St. Lawrence Alt 8620 3.1 6.5 48 8.2 7.9 104
Togwotee Pass 9580 30.3 21.2 143 30.4 22.4 136
Townsend Creek 8700 6.5 8.7 75 8.3 10.5 79
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Basin Index (%) 117 115
BIGHORN BASIN
Bald Mtn. 9380 19.5 17.0 115 13.8 15.4 90
Bear Trap Meadow 8200 9.3 5.2 179 9.8 7.5 131
Bone Springs Div 9350 17.6 14.5 121 13.5 14.0 96
Grave Springs 8550 6.5 8.4 77 -M 9.3 *
Kirwin 9550 18.8 8.8 214 16.9 10.4 162
Marquette 8760 5.5 -M * 9.2 -M *
Middle Powder 7760 8.2 10.5 78 -M 10.5 *
Owl Creek 8975 3.9 4.8 81 5.8 5.3 109
Powder River Pass 9480 15.6 9.6 162 14.5 11.4 127
Shell Creek 9580 19.8 13.5 147 14.8 12.4 119
Timber Creek 7950 3.3 4.2 79 -M 6.5 *
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Basin Index (%) 127 117
SHOSHONE RIVER
Blackwater 9780 32.3 21.2 152 30.0 18.8 160
Evening Star 9200 37.9 23.3 163 40.9 25.2 162
Marquette 8760 5.5 -M * 9.2 -M *
Sylvan Road 7120 13.4 10.8 124 20.2 15.5 130
Younts Peak 8350 -M 13.7 * -M 14.6 *
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Basin Index (%) 151 153
POWDER RIVER
Bear Trap Meadow 8200 9.3 5.2 179 9.8 7.5 131
Cloud Peak Reservoir 9860 14.4 13.4 107 13.0 11.8 110
Grave Springs 8550 6.5 8.4 77 -M 9.3 *
Hansen Sawmill 8360 8.0 6.0 133 9.3 7.6 122
Middle Powder 7760 8.2 10.5 78 -M 10.5 *
Powder River Pass 9480 15.6 9.6 162 14.5 11.4 127
Soldier Park 8720 6.4 -M * 9.0 -M *
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Basin Index (%) 117 122
TONGUE RIVER
Big Goose 7990 7.2 8.2 88 7.4 9.6 77
Bone Springs Div 9350 17.6 14.5 121 13.5 14.0 96
Burgess Junction 7880 8.7 10.3 84 7.3 10.9 67
Dome Lake 8880 13.7 10.8 127 10.8 12.0 90
Little Goose 8870 8.8 -M * 10.8 -M *
Sucker Creek 8880 9.6 11.1 86 7.2 12.7 57
Tie Creek 6870 3.9 5.3 74 -M 10.1 *
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Basin Index (%) 101 78
BELLE FOURCHE
Cole Canyon 5910 6.4 5.7 112 8.4 8.2 102
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Basin Index (%) 112 102
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 7.1 99 10.3 10.7 96
North Rapid Creek 6130 6.7 6.7 100 7.9 8.9 89
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Basin Index (%) 99 93
UPPER N. PLATTE
Arapaho Ridge 10960 18.7 18.7 100 18.3 20.3 90
Blackhall Mtn 9820 26.1 -M * 25.3 -M *
Columbine 9160 21.4 22.0 97 21.9 23.7 92
Divide Peak 8880 12.9 18.5 70 16.6 19.7 84
Joe Wright 10120 17.4 19.6 89 26.7 23.7 113
Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64
Med Bow 10500 37.5 -M * 30.6 -M *
North French Creek 10130 25.4 26.8 95 24.8 24.6 101
Never Summer 10280 17.8 18.6 96 14.7 -M *
Old Battle 10000 23.8 27.8 86 22.9 32.4 71
Rawah 9020 10.1 9.9 102 14.1 12.8 110
Sage Creek Basin 7850 8.2 12.0 68 9.8 13.3 74
Sand Lake 10050 24.4 25.9 94 20.6 22.5 92
South Brush Creek 8440 9.1 11.7 78 10.9 13.9 78
Tower 10500 33.2 41.6 80 26.4 36.8 72
Webber Springs 9250 17.8 22.0 81 20.3 24.6 83
Willow Creek Pass 9540 12.7 11.3 112 13.4 12.1 111
Zirkel 9340 26.1 25.7 102 29.6 26.2 113
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Basin Index (%) 89 89
SWEETWATER
Deer Park 9700 11.8 14.1 84 14.4 17.7 81
Larsen Creek 9000 10.8 11.7 92 11.0 -M *
South Pass 9040 11.1 14.4 77 -M 15.9 *
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Basin Index (%) 84 81*
LOWER N. PLATTE
Casper Mtn. 7900 7.3 12.8 57 5.9 13.3 44
Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64
Reno Hill 8400 9.0 12.5 72 10.3 13.7 75
Windy Peak 7900 5.8 7.6 76 7.4 9.5 78
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Basin Index (%) 66 65
LARAMIE RIVER
Brooklyn Lake 10240 23.3 18.5 126 23.1 19.2 120
Cinnabar Park 9574 20.0 19.4 103 23.1 22.2 104
Crow Creek 8330 3.6 6.9 52 9.9 9.7 102
Deadman Hill 10220 19.2 14.6 132 18.3 15.6 117
Rawah 9020 10.1 9.9 102 14.1 12.8 110
Roach 9700 12.6 14.5 87 15.9 17.5 91
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Basin Index (%) 106 108
S. PLATTE
Black Mountain 8920 9.8 -M * 12.5 -M *
Crow Creek 8330 3.6 6.9 52 9.9 9.7 102
Deadman Hill 10220 19.2 14.6 132 18.3 15.6 117
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Basin Index (%) 106 111
LITTLE SNAKE RIVER
Battle Mountain 7440 6.2 11.1 56 9.6 14.0 69
Divide Peak 8880 12.9 18.5 70 16.6 19.7 84
Elk River 8700 13.9 17.7 79 15.3 18.5 83
Little Snake River 8915 20.1 21.7 93 26.0 27.3 95
Old Battle 10000 23.8 27.8 86 22.9 32.4 71
Sage Creek Basin 7850 8.2 12.0 68 9.8 13.3 74
Sandstone RS 8150 8.7 12.9 67 8.3 17.1 49
Whiskey Park 8950 22.6 24.7 91 23.8 25.8 92
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Basin Index (%) 80 79
UPPER GREEN RIVER
Big Sandy Opening 9080 12.9 12.0 108 12.7 12.2 104
Blind Bull Sum 8650 31.3 21.2 148 18.7 18.2 103
East Rim Divide 7930 11.6 9.7 120 11.5 11.0 105
Elkhart Park G.S. 9400 11.9 11.4 104 11.4 12.3 93
Gros Ventre Summit 8750 14.3 12.1 118 13.6 11.9 114
Gunsight Pass 9820 15.4 12.7 121 14.9 12.6 118
Kendall R.S. 7740 14.1 11.3 125 14.5 13.4 108
Loomis Park 8240 17.0 14.1 121 17.5 16.1 109
New Fork Lake 8340 11.4 9.8 116 10.7 10.1 106
Pocket Creek 9360 8.7 -M * 8.7 -M *
Snider Basin 8060 12.7 11.4 111 14.1 13.1 108
Spring Creek Divide 9000 25.8 22.1 117 23.6 22.2 106
Triple Peak 8500 27.9 20.4 137 29.1 23.5 124
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Basin Index (%) 123 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.4 -M * 8.5 -M *
Buck Pasture 9632 11.7 -M * 12.6 -M *
EF Blacks Fork GS 9360 10.6 -M * 5.8 -M *
Hams Fork 7840 9.2 10.6 87 9.1 10.5 87
Hewinta 9500 8.7 10.0 87 10.7 12.8 84
Hickerson Park 9122 6.6 6.9 96 7.5 9.2 82
Hole-in-Rock 9168 6.9 6.9 100 8.1 8.6 94
Indian Creek 9425 20.7 22.4 92 15.1 20.9 72
Kelley R.S. 8180 13.0 14.2 92 14.1 16.8 84
Spirit Lk 10235 10.4 -M * 11.6 -M *
Steel Creek Park 10158 13.3 14.0 95 13.2 14.8 89
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Basin Index (%) 92 83
UPPER BEAR RIVER
Bear River RS 8777 7.9 -M * 10.2 -M *
Bug Lake 7987 14.7 17.4 84 15.5 17.9 87
Burts Miller Ranch 8000 5.2 -M * 6.2 -M *
Chalk Creek #1 9171 14.5 22.3 65 15.6 23.1 68
Hayden Fork 9130 13.0 14.6 89 15.6 19.3 81
Kelley R.S. 8180 13.0 14.2 92 14.1 16.8 84
Lily Lake 9133 8.9 11.7 76 11.0 15.6 71
Monte Cristo 8932 21.3 25.2 85 20.7 24.0 86
Salt River Summit 7640 10.8 12.4 87 12.3 15.5 79
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Basin Index (%) 82 79
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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.