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 SATURDAY: MARCH 17 , 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 16.7 14.4 116 18.5 18.8 98
Black Bear 8170 38.8 32.2 120 36.0 33.9 106
Blind Bull Sum 8650 29.4 20.2 146 17.6 17.4 101
Cottonwood Creek 7670 19.6 19.3 102 21.8 21.5 101
East Rim Divide 7930 10.9 9.5 115 10.8 10.4 104
Grand Targhee 9260 41.0 32.7 125 26.8 26.7 100
Granite Creek 6770 16.0 14.9 107 18.1 17.9 101
Grassy Lake 7265 28.8 28.9 100 31.9 32.2 99
Gros Ventre Summit 8750 12.8 11.3 113 12.5 11.2 112
Gunsight Pass 9820 14.3 11.9 120 13.8 12.0 115
Lewis Lake Divide 7850 34.7 27.4 127 35.2 31.6 111
Phillips Bench 8200 22.7 22.0 103 23.3 24.9 94
Salt River Summit 7640 9.7 11.8 82 11.2 14.7 76
Snake River Station 6920 17.0 15.2 112 21.6 20.1 107
Spring Creek Divide 9000 23.2 20.5 113 21.9 21.1 104
Thumb Divide 7980 17.7 13.8 128 17.0 16.2 105
Togwotee Pass 9580 28.4 20.3 140 28.7 21.4 134
Two Ocean Plateau 9240 34.0 23.7 143 26.7 24.0 111
Willow Creek 8080 29.5 25.2 117 30.9 29.4 105
Younts Peak 8350 -M 13.1 * -M 13.9 *
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Basin Index (%) 119 105
MADISON-GALLATIN
Black Bear 8170 38.8 32.2 120 36.0 33.9 106
Canyon 7870 16.0 11.7 137 18.0 14.3 126
Madison Plateau 7750 24.8 19.9 125 24.3 23.3 104
West Yellowstone 6700 12.8 9.9 129 15.6 12.6 124
Whiskey Creek 6800 15.0 13.8 109 17.2 17.9 96
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Basin Index (%) 123 109
YELLOWSTONE
Beartooth Lake 9360 36.0 18.8 191 31.0 17.4 178
Burnt Mtn 5880 6.9 4.4 157 13.1 10.6 124
Canyon 7870 16.0 11.7 137 18.0 14.3 126
Cole Creek 7850 12.9 11.7 110 8.3 10.3 81
Evening Star 9200 37.0 21.8 170 -M 24.0 *
Fisher Creek 9100 47.8 28.0 171 42.2 28.1 150
Northeast Entrance 7350 13.3 8.8 151 16.4 10.8 152
Parker Peak 9400 30.3 17.3 175 -M 15.4 *
Sylvan Lake 8420 22.4 17.8 126 24.0 19.6 122
Thumb Divide 7980 17.7 13.8 128 17.0 16.2 105
Two Ocean Plateau 9240 34.0 23.7 143 26.7 24.0 111
White Mill 8700 37.5 19.6 191 28.6 20.9 137
Wolverine 7650 20.0 8.8 227 19.0 10.8 176
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Basin Index (%) 161 133
WIND RIVER
Burroughs Creek 8750 14.6 -M * 16.6 -M *
Castle Creek 8400 7.7 -M * 8.9 -M *
Cold Springs 9630 8.7 6.2 140 8.9 8.3 107
Deer Park 9700 9.9 12.6 79 12.6 16.8 75
Hobbs Park 10100 14.2 11.4 125 12.1 10.8 112
Kirwin 9550 17.8 8.3 214 16.3 9.7 168
Little Warm 9370 14.0 9.1 154 14.5 10.9 133
Owl Creek 8975 3.7 4.5 82 5.3 4.8 110
South Pass 9040 9.7 13.2 73 -M 15.0 *
St. Lawrence Alt 8620 2.7 5.9 46 7.2 7.3 99
Togwotee Pass 9580 28.4 20.3 140 28.7 21.4 134
Townsend Creek 8700 6.2 7.9 78 7.7 9.8 79
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Basin Index (%) 116 114
BIGHORN BASIN
Bald Mtn. 9380 18.3 16.3 112 12.8 14.5 88
Bear Trap Meadow 8200 8.3 4.9 169 8.7 6.8 128
Bone Springs Div 9350 16.4 13.8 119 12.2 13.1 93
Grave Springs 8550 5.8 7.9 73 4.5 8.7 52
Kirwin 9550 17.8 8.3 214 16.3 9.7 168
Marquette 8760 5.0 -M * 8.7 -M *
Middle Powder 7760 7.7 9.3 83 -M 9.7 *
Owl Creek 8975 3.7 4.5 82 5.3 4.8 110
Powder River Pass 9480 14.6 8.9 164 13.3 10.6 125
Shell Creek 9580 18.2 12.6 144 13.7 11.6 118
Timber Creek 7950 2.9 4.2 69 -M 5.9 *
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Basin Index (%) 125 109
SHOSHONE RIVER
Blackwater 9780 31.2 20.2 154 29.2 17.8 164
Evening Star 9200 37.0 21.8 170 -M 24.0 *
Marquette 8760 5.0 -M * 8.7 -M *
Sylvan Road 7120 13.4 10.3 130 19.5 14.9 131
Younts Peak 8350 -M 13.1 * -M 13.9 *
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Basin Index (%) 156 149*
POWDER RIVER
Bear Trap Meadow 8200 8.3 4.9 169 8.7 6.8 128
Cloud Peak Reservoir 9860 13.2 12.5 106 11.5 10.8 106
Grave Springs 8550 5.8 7.9 73 4.5 8.7 52
Hansen Sawmill 8360 6.6 5.5 120 8.0 6.9 116
Middle Powder 7760 7.7 9.3 83 -M 9.7 *
Powder River Pass 9480 14.6 8.9 164 13.3 10.6 125
Soldier Park 8720 5.3 -M * 7.9 -M *
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Basin Index (%) 115 105
TONGUE RIVER
Big Goose 7990 6.4 7.5 85 6.8 8.8 77
Bone Springs Div 9350 16.4 13.8 119 12.2 13.1 93
Burgess Junction 7880 8.0 9.4 85 6.9 10.1 68
Dome Lake 8880 12.6 9.9 127 9.7 11.1 87
Little Goose 8870 7.7 -M * 9.8 -M *
Sucker Creek 8880 8.8 10.6 83 6.6 11.8 56
Tie Creek 6870 3.7 4.8 77 7.3 9.5 77
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Basin Index (%) 100 77
BELLE FOURCHE
Cole Canyon 5910 5.9 5.4 109 7.6 7.8 97
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Basin Index (%) 109 97
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 7.2 97 9.8 10.3 95
North Rapid Creek 6130 6.7 6.4 105 7.3 8.4 87
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Basin Index (%) 101 91
UPPER N. PLATTE
Arapaho Ridge 10960 17.0 18.0 94 16.6 19.1 87
Blackhall Mtn 9820 23.7 -M * 23.2 -M *
Columbine 9160 20.1 21.7 93 20.1 22.5 89
Divide Peak 8880 12.4 17.4 71 15.7 18.6 84
Joe Wright 10120 14.8 18.8 79 24.1 22.3 108
Laprele Creek 8375 5.7 9.0 63 7.0 10.5 67
Med Bow 10500 34.9 -M * 28.5 -M *
North French Creek 10130 23.3 24.3 96 23.0 23.2 99
Never Summer 10280 15.6 17.5 89 12.7 -M *
Old Battle 10000 21.9 26.1 84 21.2 30.8 69
Rawah 9020 9.4 9.2 102 12.8 11.7 109
Sage Creek Basin 7850 8.3 11.7 71 9.1 12.8 71
Sand Lake 10050 22.5 23.9 94 18.9 21.1 90
South Brush Creek 8440 8.6 11.1 77 9.9 13.0 76
Tower 10500 29.5 39.3 75 26.1 35.1 74
Webber Springs 9250 16.6 20.8 80 19.0 23.3 82
Willow Creek Pass 9540 11.2 10.7 105 11.9 11.5 103
Zirkel 9340 23.9 25.7 93 27.2 25.0 109
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Basin Index (%) 85 87
SWEETWATER
Deer Park 9700 9.9 12.6 79 12.6 16.8 75
Larsen Creek 9000 10.0 10.9 92 9.8 -M *
South Pass 9040 9.7 13.2 73 -M 15.0 *
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Basin Index (%) 81 75*
LOWER N. PLATTE
Casper Mtn. 7900 7.0 11.9 59 5.6 12.4 45
Laprele Creek 8375 5.7 9.0 63 7.0 10.5 67
Reno Hill 8400 8.4 11.7 72 9.4 12.5 75
Windy Peak 7900 5.5 6.8 81 7.0 8.8 80
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Basin Index (%) 68 66
LARAMIE RIVER
Brooklyn Lake 10240 20.9 17.5 119 21.4 18.0 119
Cinnabar Park 9574 19.0 17.8 107 21.7 21.1 103
Crow Creek 8330 3.5 7.1 49 9.5 8.7 109
Deadman Hill 10220 16.9 13.6 124 16.3 14.5 112
Rawah 9020 9.4 9.2 102 12.8 11.7 109
Roach 9700 11.8 13.7 86 14.8 16.5 90
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Basin Index (%) 103 107
S. PLATTE
Black Mountain 8920 8.5 -M * 11.1 -M *
Crow Creek 8330 3.5 7.1 49 9.5 8.7 109
Deadman Hill 10220 16.9 13.6 124 16.3 14.5 112
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Basin Index (%) 99 111
LITTLE SNAKE RIVER
Battle Mountain 7440 6.2 11.1 56 -M 13.3 *
Divide Peak 8880 12.4 17.4 71 15.7 18.6 84
Elk River 8700 13.4 17.3 77 14.0 17.6 80
Little Snake River 8915 18.3 20.7 88 23.9 26.2 91
Old Battle 10000 21.9 26.1 84 21.2 30.8 69
Sage Creek Basin 7850 8.3 11.7 71 9.1 12.8 71
Sandstone RS 8150 7.8 11.7 67 7.2 16.4 44
Whiskey Park 8950 20.9 24.0 87 22.0 24.5 90
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Basin Index (%) 78 77
UPPER GREEN RIVER
Big Sandy Opening 9080 11.2 11.3 99 11.1 11.6 96
Blind Bull Sum 8650 29.4 20.2 146 17.6 17.4 101
East Rim Divide 7930 10.9 9.5 115 10.8 10.4 104
Elkhart Park G.S. 9400 10.8 10.5 103 10.4 11.6 90
Gros Ventre Summit 8750 12.8 11.3 113 12.5 11.2 112
Gunsight Pass 9820 14.3 11.9 120 13.8 12.0 115
Kendall R.S. 7740 13.7 11.0 125 13.7 12.8 107
Loomis Park 8240 15.9 13.1 121 16.4 15.3 107
New Fork Lake 8340 10.7 9.2 116 9.9 9.6 103
Pocket Creek 9360 7.6 -M * 7.6 -M *
Snider Basin 8060 11.9 10.9 109 13.5 12.6 107
Spring Creek Divide 9000 23.2 20.5 113 21.9 21.1 104
Triple Peak 8500 25.8 19.2 134 27.6 22.3 124
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Basin Index (%) 120 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.5 -M * 7.8 -M *
Buck Pasture 9632 9.9 -M * 11.0 -M *
EF Blacks Fork GS 9360 9.6 -M * -M -M *
Hams Fork 7840 8.5 10.2 83 8.4 10.0 84
Hewinta 9500 6.8 9.4 72 9.7 12.0 81
Hickerson Park 9122 6.6 6.6 100 6.3 8.6 73
Hole-in-Rock 9168 5.8 6.4 91 6.5 8.1 80
Indian Creek 9425 19.0 20.9 91 13.9 19.7 71
Kelley R.S. 8180 12.0 13.1 92 13.0 15.9 82
Spirit Lk 10235 7.8 -M * 9.2 -M *
Steel Creek Park 10158 11.7 13.2 89 11.6 14.0 83
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Basin Index (%) 88 79
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 9.0 -M *
Bug Lake 7987 13.7 16.5 83 14.1 17.1 82
Burts Miller Ranch 8000 4.3 -M * 5.5 -M *
Chalk Creek #1 9171 12.5 20.6 61 13.6 21.7 63
Hayden Fork 9130 10.2 14.1 72 13.3 18.2 73
Kelley R.S. 8180 12.0 13.1 92 13.0 15.9 82
Lily Lake 9133 7.7 11.4 68 9.5 14.7 65
Monte Cristo 8932 18.0 23.9 75 17.2 22.7 76
Salt River Summit 7640 9.7 11.8 82 11.2 14.7 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.