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 FRIDAY: APRIL 12 , 2019
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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 17.4 14.4 121 22.1 21.1 105
Black Bear 8170 42.9 36.7 117 45.4 38.5 118
Blind Bull Sum 8650 24.5 23.6 104 19.1 19.6 97
Cottonwood Creek 7670 21.4 20.5 104 26.5 24.9 106
East Rim Divide 7930 10.4 10.1 103 11.8 11.8 100
Grand Targhee 9260 45.4 40.0 114 32.3 31.3 103
Granite Creek 6770 17.1 13.3 129 20.9 19.7 106
Grassy Lake 7265 33.3 31.4 106 38.2 36.2 106
Gros Ventre Summit 8750 9.2 12.8 72 12.6 13.1 96
Gunsight Pass 9820 13.6 13.7 99 16.1 14.1 114
Lewis Lake Divide 7850 36.7 30.2 122 39.3 35.7 110
Phillips Bench 8200 29.4 25.9 114 33.0 28.4 116
Salt River Summit 7640 13.8 12.1 114 16.7 16.8 99
Snake River Station 6920 18.0 13.9 129 25.9 22.7 114
Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99
Thumb Divide 7980 19.4 14.6 133 19.7 18.8 105
Togwotee Pass 9580 24.7 22.7 109 25.5 24.6 104
Two Ocean Plateau 9240 32.0 26.7 120 26.9 27.5 98
Willow Creek 8080 32.5 27.5 118 36.3 34.0 107
Younts Peak 8350 -M 14.5 * -M 16.0 *
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Basin Index (%) 113 106
MADISON-GALLATIN
Black Bear 8170 42.9 36.7 117 45.4 38.5 118
Canyon 7870 13.9 12.3 113 16.9 16.4 103
Madison Plateau 7750 31.1 22.2 140 29.1 26.5 110
West Yellowstone 6700 11.7 8.6 136 18.0 14.2 127
Whiskey Creek 6800 18.9 14.6 129 22.0 20.3 108
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Basin Index (%) 126 113
YELLOWSTONE
Beartooth Lake 9360 21.9 21.8 100 20.1 20.0 100
Burnt Mtn 5880 6.9 2.4 288 14.3 13.3 108
Canyon 7870 13.9 12.3 113 16.9 16.4 103
Cole Creek 7850 17.4 15.3 114 -M 13.5 *
Evening Star 9200 27.0 24.2 112 29.7 27.7 107
Fisher Creek 9100 34.1 31.6 108 36.0 32.0 112
Northeast Entrance 7350 9.2 8.5 108 15.0 12.4 121
Parker Peak 9400 24.6 20.1 122 24.8 17.9 139
Sylvan Lake 8420 21.6 19.8 109 27.9 22.6 123
Thumb Divide 7980 19.4 14.6 133 19.7 18.8 105
Two Ocean Plateau 9240 32.0 26.7 120 26.9 27.5 98
White Mill 8700 25.1 23.1 109 21.4 24.0 89
Wolverine 7650 9.8 9.2 107 12.9 12.3 105
Younts Peak 8350 -M 14.5 * -M 16.0 *
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Basin Index (%) 115 108
WIND RIVER
Burroughs Creek 8750 11.3 -M * 13.0 -M *
Castle Creek 8400 3.6 -M * 6.2 -M *
Cold Springs 9630 7.5 6.1 123 8.2 10.3 80
Deer Park 9700 16.7 16.2 103 18.5 20.5 90
Hobbs Park 10100 16.5 14.8 111 13.0 14.0 93
Kirwin 9550 10.8 9.8 110 11.5 11.8 97
Little Warm 9370 9.8 10.3 95 9.2 13.1 70
Owl Creek 8975 4.4 5.6 79 6.7 6.3 106
South Pass 9040 15.2 15.8 96 12.7 17.8 71
St. Lawrence Alt 8620 -M 6.8 * -M 9.3 *
Togwotee Pass 9580 24.7 22.7 109 25.5 24.6 104
Townsend Creek 8700 11.2 10.0 112 12.3 12.6 98
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Basin Index (%) 105 90
BIGHORN BASIN
Bald Mtn. 9380 17.1 19.3 89 12.3 17.4 71
Bear Trap Meadow 8200 5.5 4.6 120 6.9 8.8 78
Bone Springs Div 9350 12.7 17.0 75 11.4 15.9 72
Grave Springs 8550 8.4 9.6 88 9.7 11.0 88
Kirwin 9550 10.8 9.8 110 11.5 11.8 97
Marquette 8760 8.0 -M * 9.9 -M *
Middle Powder 7760 8.2 12.4 66 8.0 12.1 66
Owl Creek 8975 4.4 5.6 79 6.7 6.3 106
Powder River Pass 9480 10.0 10.3 97 -M 13.0 *
Shell Creek 9580 13.3 15.6 85 10.9 14.1 77
Timber Creek 7950 3.3 5.1 65 6.8 7.6 89
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Basin Index (%) 86 80
SHOSHONE RIVER
Blackwater 9780 25.2 23.3 108 25.4 20.9 122
Evening Star 9200 27.0 24.2 112 29.7 27.7 107
Marquette 8760 8.0 -M * 9.9 -M *
Sylvan Lake 8420 21.6 19.8 109 27.9 22.6 123
Sylvan Road 7120 8.9 10.4 86 16.3 16.9 96
Younts Peak 8350 -M 14.5 * -M 16.0 *
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Basin Index (%) 106 113
POWDER RIVER
Bear Trap Meadow 8200 5.5 4.6 120 6.9 8.8 78
Cloud Peak Reservoir 9860 11.9 15.3 78 11.0 13.8 80
Grave Springs 8550 8.4 9.6 88 9.7 11.0 88
Hansen Sawmill 8360 5.6 6.1 92 8.1 8.9 91
Middle Powder 7760 8.2 12.4 66 8.0 12.1 66
Powder River Pass 9480 10.0 10.3 97 -M 13.0 *
Soldier Park 8720 3.3 -M * 7.1 -M *
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Basin Index (%) 85 80
TONGUE RIVER
Big Goose 7990 8.0 9.9 81 9.9 12.0 82
Bone Springs Div 9350 12.7 17.0 75 11.4 15.9 72
Burgess Junction 7880 8.8 12.2 72 8.6 12.8 67
Dome Lake 8880 7.2 11.9 61 8.1 14.1 57
Little Goose 8870 9.4 -M * 8.1 -M *
Sucker Creek 8880 10.8 12.5 86 9.7 14.9 65
Tie Creek 6870 3.9 5.2 75 10.8 12.1 89
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Basin Index (%) 75 72
BELLE FOURCHE
Blind Park 6890 3.8 6.2 61 7.8 12.3 63
Cole Canyon 5910 5.6 4.1 137 12.8 9.8 131
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Basin Index (%) 91 93
CHEYENNE RIVER BASIN
Blind Park 6890 3.8 6.2 61 7.8 12.3 63
North Rapid Creek 6130 4.6 6.0 77 7.6 10.3 74
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Basin Index (%) 69 68
UPPER N. PLATTE
Arapaho Ridge 10960 26.4 21.4 123 26.5 23.4 113
Blackhall Mtn 9820 32.9 -M * 34.0 -M *
Columbine 9160 26.9 22.8 118 29.1 26.0 112
Divide Peak 8880 21.5 20.3 106 24.0 21.9 110
Joe Wright 10120 22.9 21.9 105 30.8 26.5 116
Laprele Creek 8375 13.0 9.4 138 14.8 12.9 115
Med Bow 10500 36.8 -M * 34.8 -M *
Never Summer 10280 22.5 20.5 110 19.6 -M *
North French Creek 10130 29.9 31.0 96 30.5 27.4 111
Old Battle 10000 36.9 32.0 115 37.1 35.6 104
Rawah 9020 12.4 10.2 122 17.7 14.9 119
Sage Creek Basin 7850 18.6 10.3 181 16.5 14.9 111
Sand Lake 10050 29.6 30.0 99 24.7 25.5 97
South Brush Creek 8440 9.0 11.5 78 12.5 15.7 80
Tower 10500 52.2 47.1 111 45.5 40.5 112
Webber Springs 9250 25.7 23.4 110 31.6 27.3 116
Whiskey Park 8950 31.3 27.6 113 33.1 28.4 117
Willow Creek Pass 9540 16.8 12.5 134 18.0 13.8 130
Zirkel 9340 32.8 25.1 131 38.1 29.1 131
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Basin Index (%) 114 112
SWEETWATER
Deer Park 9700 16.7 16.2 103 18.5 20.5 90
Larsen Creek 9000 9.4 11.1 85 14.4 -M *
South Pass 9040 15.2 15.8 96 12.7 17.8 71
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Basin Index (%) 96 81
LOWER N. PLATTE
Casper Mtn. 7900 16.2 14.5 112 13.0 15.6 83
Laprele Creek 8375 13.0 9.4 138 14.8 12.9 115
Reno Hill 8400 17.0 14.2 120 17.8 16.1 111
Windy Peak 7900 9.9 7.5 132 11.6 10.9 106
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Basin Index (%) 123 103
LARAMIE RIVER
Brooklyn Lake 10240 24.3 22.3 109 25.7 21.7 118
Cinnabar Park 9574 20.7 21.4 97 23.9 24.8 96
Crow Creek 8330 4.9 5.9 83 11.1 11.3 98
Deadman Hill 10220 21.7 16.6 131 20.3 17.9 113
Rawah 9020 12.4 10.2 122 17.7 14.9 119
Roach 9700 17.8 16.5 108 22.2 19.7 113
Windy Peak 7900 9.9 7.5 132 11.6 10.9 106
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Basin Index (%) 111 109
S. PLATTE
Black Mountain 8920 12.4 -M * 14.1 -M *
Crow Creek 8330 4.9 5.9 83 11.1 11.3 98
Deadman Hill 10220 21.7 16.6 131 20.3 17.9 113
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Basin Index (%) 118 108
LITTLE SNAKE RIVER
Battle Mountain 7440 10.0 8.0 125 17.0 15.3 111
Divide Peak 8880 21.5 20.3 106 24.0 21.9 110
Elk River 8700 18.6 18.2 102 20.3 20.5 99
Little Snake River 8915 28.6 26.0 110 38.0 30.6 124
Old Battle 10000 36.9 32.0 115 37.1 35.6 104
Sage Creek Basin 7850 18.6 10.3 181 16.5 14.9 111
Sandstone RS 8150 14.6 12.5 117 18.9 18.7 101
Whiskey Park 8950 31.3 27.6 113 33.1 28.4 117
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Basin Index (%) 116 110
UPPER GREEN RIVER
Big Sandy Opening 9080 14.0 12.9 109 14.7 13.5 109
Blind Bull Sum 8650 24.5 23.6 104 19.1 19.6 97
East Rim Divide 7930 10.4 10.1 103 11.8 11.8 100
Elkhart Park G.S. 9400 13.5 12.3 110 14.0 13.5 104
Gros Ventre Summit 8750 9.2 12.8 72 12.6 13.1 96
Gunsight Pass 9820 13.6 13.7 99 16.1 14.1 114
Indian Creek 9425 23.5 24.6 96 18.7 22.8 82
Kendall R.S. 7740 9.9 10.7 93 11.6 14.3 81
Loomis Park 8240 14.9 13.7 109 16.9 17.4 97
New Fork Lake 8340 10.0 9.9 101 9.7 10.9 89
Pocket Creek 9360 14.8 -M * 15.2 -M *
Snider Basin 8060 10.4 12.2 85 13.3 14.3 93
Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99
Triple Peak 8500 24.3 20.7 117 25.7 25.5 101
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Basin Index (%) 101 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.9 -M * 14.3 -M *
Buck Pasture 9632 16.4 -M * 20.7 -M *
EF Blacks Fork GS 9360 13.2 -M * 12.8 -M *
Hams Fork 7840 9.7 9.5 102 11.8 11.5 103
Hewinta 9500 12.9 10.5 123 16.5 14.4 115
Hickerson Park 9122 10.3 7.5 137 12.8 10.6 121
Hole-in-Rock 9168 7.8 7.1 110 11.7 10.1 116
Indian Creek 9425 23.5 24.6 96 18.7 22.8 82
Kelley R.S. 8180 15.2 14.2 107 16.3 18.3 89
Spirit Lk 10235 17.6 -M * 18.4 -M *
Steel Creek Park 10158 17.5 16.1 109 20.4 17.0 120
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Basin Index (%) 108 103
UPPER BEAR RIVER
Bear River RS 8777 10.9 -M * 16.6 -M *
Bug Lake 7987 23.7 19.1 124 24.0 19.7 122
Burts Miller Ranch 8000 6.0 -M * 9.5 -M *
Chalk Creek #1 9171 27.9 24.7 113 31.4 25.8 122
Hayden Fork 9130 16.8 14.7 114 25.0 21.5 116
Kelley R.S. 8180 15.2 14.2 107 16.3 18.3 89
Lily Lake 9133 14.3 12.7 113 17.8 17.6 101
Monte Cristo 8932 35.0 27.8 126 32.4 26.5 122
Salt River Summit 7640 13.8 12.1 114 16.7 16.8 99
Spring Creek Divide 9000 23.3 22.9 102 23.8 24.0 99
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Basin Index (%) 115 110
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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.