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: APRIL 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 17.3 14.9 116 20.1 20.3 99
Black Bear 8170 41.2 36.6 113 39.9 36.8 108
Blind Bull Sum 8650 32.7 22.6 145 19.5 18.9 103
Cottonwood Creek 7670 21.7 21.3 102 25.0 23.8 105
East Rim Divide 7930 12.3 10.0 123 12.3 11.4 108
Grand Targhee 9260 45.1 36.9 122 28.6 29.9 96
Granite Creek 6770 18.3 14.8 124 20.9 19.2 109
Grassy Lake 7265 31.4 31.6 99 34.3 34.8 99
Gros Ventre Summit 8750 15.7 13.0 121 14.8 12.5 118
Gunsight Pass 9820 16.8 13.4 125 16.1 13.3 121
Lewis Lake Divide 7850 38.7 29.5 131 37.7 34.3 110
Phillips Bench 8200 28.1 24.4 115 27.6 27.3 101
Salt River Summit 7640 11.1 12.9 86 12.8 16.1 80
Snake River Station 6920 18.5 15.3 121 23.0 21.7 106
Spring Creek Divide 9000 26.4 22.5 117 24.5 23.1 106
Thumb Divide 7980 19.2 14.8 130 18.4 17.9 103
Togwotee Pass 9580 31.2 21.7 144 31.3 23.4 134
Two Ocean Plateau 9240 36.4 25.6 142 28.4 26.3 108
Willow Creek 8080 33.4 28.0 119 34.5 32.4 106
Younts Peak 8350 -M 14.2 * -M 15.2 *
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Basin Index (%) 121 106
MADISON-GALLATIN
Black Bear 8170 41.2 36.6 113 39.9 36.8 108
Canyon 7870 16.7 12.4 135 19.0 15.7 121
Madison Plateau 7750 26.5 21.4 124 26.6 25.4 105
West Yellowstone 6700 13.8 10.2 135 16.9 13.6 124
Whiskey Creek 6800 16.3 15.0 109 19.0 19.4 98
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Basin Index (%) 120 109
YELLOWSTONE
Beartooth Lake 9360 37.8 21.1 179 34.2 19.0 180
Burnt Mtn 5880 6.9 4.4 157 13.7 12.3 111
Canyon 7870 16.7 12.4 135 19.0 15.7 121
Cole Creek 7850 13.8 13.7 101 -M 12.1 *
Evening Star 9200 39.8 23.9 167 41.7 26.3 159
Fisher Creek 9100 51.2 30.4 168 44.7 30.5 147
Northeast Entrance 7350 13.8 9.5 145 17.7 11.8 150
Parker Peak 9400 32.7 18.9 173 28.1 17.0 165
Sylvan Lake 8420 24.3 19.2 127 25.8 21.5 120
Thumb Divide 7980 19.2 14.8 130 18.4 17.9 103
Two Ocean Plateau 9240 36.4 25.6 142 28.4 26.3 108
White Mill 8700 39.9 21.7 184 30.7 22.8 135
Wolverine 7650 20.6 9.2 224 20.1 11.8 170
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Basin Index (%) 157 138
WIND RIVER
Burroughs Creek 8750 15.6 -M * 17.4 -M *
Castle Creek 8400 8.2 -M * 9.7 -M *
Cold Springs 9630 9.4 7.1 132 9.8 9.6 102
Deer Park 9700 12.4 14.8 84 15.3 18.8 81
Hobbs Park 10100 17.1 13.5 127 14.6 12.7 115
Kirwin 9550 19.3 9.5 203 17.3 11.1 156
Little Warm 9370 15.7 10.2 154 16.1 12.3 131
Owl Creek 8975 4.3 5.6 77 6.0 5.7 105
South Pass 9040 12.0 14.9 81 8.5 16.7 51
St. Lawrence Alt 8620 3.1 6.8 46 8.5 8.6 99
Togwotee Pass 9580 31.2 21.7 144 31.3 23.4 134
Townsend Creek 8700 7.2 9.1 79 9.2 11.4 81
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Basin Index (%) 116 105
BIGHORN BASIN
Bald Mtn. 9380 20.5 18.8 109 14.7 16.4 90
Bear Trap Meadow 8200 -M 5.1 * 10.9 8.1 135
Bone Springs Div 9350 18.7 16.1 116 14.4 14.9 97
Grave Springs 8550 7.7 9.0 86 -M 10.1 *
Kirwin 9550 19.3 9.5 203 17.3 11.1 156
Marquette 8760 5.8 -M * 9.6 -M *
Middle Powder 7760 9.6 11.5 83 -M 11.2 *
Owl Creek 8975 4.3 5.6 77 6.0 5.7 105
Powder River Pass 9480 16.2 10.0 162 15.5 12.0 129
Shell Creek 9580 20.9 14.7 142 15.7 13.2 119
Timber Creek 7950 3.4 4.8 71 -M 7.1 *
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Basin Index (%) 121 116
SHOSHONE RIVER
Blackwater 9780 33.2 22.2 150 30.6 19.8 155
Evening Star 9200 39.8 23.9 167 41.7 26.3 159
Marquette 8760 5.8 -M * 9.6 -M *
Sylvan Road 7120 13.4 11.1 121 20.3 16.1 126
Younts Peak 8350 -M 14.2 * -M 15.2 *
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Basin Index (%) 151 149
POWDER RIVER
Bear Trap Meadow 8200 -M 5.1 * 10.9 8.1 135
Cloud Peak Reservoir 9860 15.9 14.2 112 14.4 12.7 113
Grave Springs 8550 7.7 9.0 86 -M 10.1 *
Hansen Sawmill 8360 9.1 6.3 144 10.4 8.2 127
Middle Powder 7760 9.6 11.5 83 -M 11.2 *
Powder River Pass 9480 16.2 10.0 162 15.5 12.0 129
Soldier Park 8720 7.7 -M * 10.2 -M *
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Basin Index (%) 115 125
TONGUE RIVER
Big Goose 7990 8.3 9.1 91 8.7 10.8 81
Bone Springs Div 9350 18.7 16.1 116 14.4 14.9 97
Burgess Junction 7880 10.0 11.4 88 8.5 11.8 72
Dome Lake 8880 14.7 11.6 127 12.0 13.0 92
Little Goose 8870 10.0 -M * 12.1 -M *
Sucker Creek 8880 10.9 11.5 95 8.7 13.8 63
Tie Creek 6870 5.0 5.5 91 9.1 11.0 83
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Basin Index (%) 104 82
BELLE FOURCHE
Cole Canyon 5910 7.7 5.8 133 10.0 8.9 112
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Basin Index (%) 133 112
CHEYENNE RIVER BASIN
Blind Park 6890 8.1 7.2 112 11.1 11.3 98
North Rapid Creek 6130 7.3 6.8 107 8.7 9.3 94
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Basin Index (%) 110 96
UPPER N. PLATTE
Arapaho Ridge 10960 19.6 20.0 98 19.2 21.5 89
Blackhall Mtn 9820 27.8 -M * 26.6 -M *
Columbine 9160 22.3 23.0 97 23.0 24.6 93
Divide Peak 8880 14.3 19.6 73 17.6 20.7 85
Joe Wright 10120 19.1 20.4 94 28.3 24.8 114
Laprele Creek 8375 6.7 9.5 71 8.0 11.9 67
Med Bow 10500 39.9 -M * 30.8 -M *
North French Creek 10130 27.9 28.2 99 27.0 25.8 105
Never Summer 10280 18.7 19.8 94 15.3 -M *
Old Battle 10000 25.0 30.0 83 23.7 33.9 70
Rawah 9020 11.5 10.4 111 14.9 13.7 109
Sage Creek Basin 7850 8.4 12.6 67 10.3 14.0 74
Sand Lake 10050 26.5 27.8 95 22.5 23.8 95
South Brush Creek 8440 11.0 12.2 90 11.9 14.7 81
Tower 10500 34.9 44.4 79 26.5 38.3 69
Webber Springs 9250 18.3 23.0 80 21.2 25.8 82
Willow Creek Pass 9540 13.0 11.8 110 13.9 12.9 108
Zirkel 9340 27.3 26.4 103 30.9 27.5 112
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Basin Index (%) 90 90
SWEETWATER
Deer Park 9700 12.4 14.8 84 15.3 18.8 81
Larsen Creek 9000 11.2 12.1 93 11.3 -M *
South Pass 9040 12.0 14.9 81 8.5 16.7 51
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Basin Index (%) 85 67
LOWER N. PLATTE
Casper Mtn. 7900 7.9 13.6 58 6.8 14.1 48
Laprele Creek 8375 6.7 9.5 71 8.0 11.9 67
Reno Hill 8400 10.1 13.4 75 11.4 14.6 78
Windy Peak 7900 6.6 7.8 85 8.2 10.1 81
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Basin Index (%) 71 68
LARAMIE RIVER
Brooklyn Lake 10240 24.9 20.3 123 24.8 20.3 122
Cinnabar Park 9574 21.1 20.2 104 24.5 23.2 106
Crow Creek 8330 4.5 6.9 65 10.8 10.3 105
Deadman Hill 10220 20.5 15.7 131 19.4 16.5 118
Rawah 9020 11.5 10.4 111 14.9 13.7 109
Roach 9700 13.7 15.8 87 17.0 18.4 92
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Basin Index (%) 108 109
S. PLATTE
Black Mountain 8920 10.8 -M * 13.3 -M *
Crow Creek 8330 4.5 6.9 65 10.8 10.3 105
Deadman Hill 10220 20.5 15.7 131 19.4 16.5 118
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Basin Index (%) 111 113
LITTLE SNAKE RIVER
Battle Mountain 7440 6.0 10.5 57 10.3 14.6 71
Divide Peak 8880 14.3 19.6 73 17.6 20.7 85
Elk River 8700 15.1 18.7 81 16.2 19.4 84
Little Snake River 8915 21.1 23.5 90 27.1 28.8 94
Old Battle 10000 25.0 30.0 83 23.7 33.9 70
Sage Creek Basin 7850 8.4 12.6 67 10.3 14.0 74
Sandstone RS 8150 8.9 13.0 68 9.0 17.8 51
Whiskey Park 8950 24.3 26.1 93 24.8 27.0 92
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Basin Index (%) 80 79
UPPER GREEN RIVER
Big Sandy Opening 9080 13.2 12.4 106 13.0 12.7 102
Blind Bull Sum 8650 32.7 22.6 145 19.5 18.9 103
East Rim Divide 7930 12.3 10.0 123 12.3 11.4 108
Elkhart Park G.S. 9400 12.4 12.1 102 11.8 12.8 92
Gros Ventre Summit 8750 15.7 13.0 121 14.8 12.5 118
Gunsight Pass 9820 16.8 13.4 125 16.1 13.3 121
Kendall R.S. 7740 15.0 11.4 132 15.4 13.8 112
Loomis Park 8240 17.8 14.2 125 18.1 16.8 108
New Fork Lake 8340 11.7 10.4 112 11.2 10.4 108
Pocket Creek 9360 8.8 -M * 9.0 -M *
Snider Basin 8060 12.6 12.3 102 14.6 13.8 106
Spring Creek Divide 9000 26.4 22.5 117 24.5 23.1 106
Triple Peak 8500 30.0 21.8 138 30.6 24.5 125
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Basin Index (%) 123 110
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.4 -M * 8.6 -M *
Buck Pasture 9632 11.8 -M * 12.8 -M *
EF Blacks Fork GS 9360 10.5 -M * 5.9 -M *
Hams Fork 7840 9.2 10.9 84 9.4 11.0 85
Hewinta 9500 7.4 10.9 68 11.0 13.5 81
Hickerson Park 9122 6.7 7.6 88 7.7 9.8 79
Hole-in-Rock 9168 7.1 6.9 103 8.2 9.2 89
Indian Creek 9425 21.5 24.1 89 15.7 21.8 72
Kelley R.S. 8180 13.5 15.0 90 14.4 17.5 82
Spirit Lk 10235 10.3 -M * 11.8 -M *
Steel Creek Park 10158 -M 15.4 * 13.4 15.8 85
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Basin Index (%) 87 81
UPPER BEAR RIVER
Bear River RS 8777 6.5 -M * 10.3 -M *
Bug Lake 7987 14.5 18.2 80 15.6 18.8 83
Burts Miller Ranch 8000 4.2 -M * 6.2 -M *
Chalk Creek #1 9171 14.5 23.6 61 15.8 24.3 65
Hayden Fork 9130 11.2 15.2 74 15.7 20.3 77
Kelley R.S. 8180 13.5 15.0 90 14.4 17.5 82
Lily Lake 9133 9.2 12.2 75 11.1 16.5 67
Monte Cristo 8932 21.1 26.6 79 21.2 25.1 84
Salt River Summit 7640 11.1 12.9 86 12.8 16.1 80
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Basin Index (%) 77 77
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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.