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: APRIL 13 , 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 17.5 14.0 125 22.2 21.2 105
Black Bear 8170 43.2 36.6 118 45.4 38.7 117
Blind Bull Sum 8650 24.4 23.7 103 19.1 19.7 97
Cottonwood Creek 7670 21.5 20.3 106 26.5 25.0 106
East Rim Divide 7930 10.2 10.1 101 11.7 11.9 98
Grand Targhee 9260 45.6 40.4 113 32.4 31.4 103
Granite Creek 6770 17.0 13.0 131 20.9 19.8 106
Grassy Lake 7265 33.4 31.4 106 38.4 36.4 105
Gros Ventre Summit 8750 8.5 12.9 66 12.6 13.2 95
Gunsight Pass 9820 13.6 13.6 100 16.1 14.1 114
Lewis Lake Divide 7850 36.8 30.2 122 39.4 35.8 110
Phillips Bench 8200 29.5 26.0 113 33.0 28.4 116
Salt River Summit 7640 13.8 11.8 117 16.7 16.9 99
Snake River Station 6920 18.1 13.6 133 25.9 22.7 114
Spring Creek Divide 9000 23.2 23.0 101 23.8 24.1 99
Thumb Divide 7980 19.4 14.6 133 19.8 18.9 105
Togwotee Pass 9580 24.9 22.8 109 25.8 24.7 104
Two Ocean Plateau 9240 32.1 26.9 119 27.0 27.6 98
Willow Creek 8080 32.3 27.2 119 36.2 34.2 106
Younts Peak 8350 -M 14.6 * -M 16.0 *
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Basin Index (%) 113 106
MADISON-GALLATIN
Black Bear 8170 43.2 36.6 118 45.4 38.7 117
Canyon 7870 14.0 12.3 114 16.9 16.5 102
Madison Plateau 7750 30.9 22.3 139 29.1 26.6 109
West Yellowstone 6700 11.5 8.5 135 18.0 14.3 126
Whiskey Creek 6800 18.8 14.6 129 22.0 20.5 107
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Basin Index (%) 126 113
YELLOWSTONE
Beartooth Lake 9360 21.9 22.0 100 20.3 20.1 101
Burnt Mtn 5880 7.0 1.7 412 14.4 13.3 108
Canyon 7870 14.0 12.3 114 16.9 16.5 102
Cole Creek 7850 17.5 15.4 114 -M 13.7 *
Evening Star 9200 27.0 24.4 111 29.7 27.8 107
Fisher Creek 9100 34.1 31.7 108 36.5 32.2 113
Northeast Entrance 7350 9.1 8.4 108 15.0 12.5 120
Parker Peak 9400 24.7 20.2 122 24.9 18.0 138
Sylvan Lake 8420 21.7 19.8 110 28.1 22.7 124
Thumb Divide 7980 19.4 14.6 133 19.8 18.9 105
Two Ocean Plateau 9240 32.1 26.9 119 27.0 27.6 98
White Mill 8700 25.0 23.3 107 21.4 24.1 89
Wolverine 7650 9.8 9.1 108 12.9 12.4 104
Younts Peak 8350 -M 14.6 * -M 16.0 *
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Basin Index (%) 115 108
WIND RIVER
Burroughs Creek 8750 12.2 -M * 13.6 -M *
Castle Creek 8400 3.6 -M * 6.6 -M *
Cold Springs 9630 7.7 6.0 128 8.3 10.3 81
Deer Park 9700 17.0 16.2 105 18.7 20.5 91
Hobbs Park 10100 16.7 14.9 112 13.3 14.1 94
Kirwin 9550 10.9 9.9 110 11.7 11.9 98
Little Warm 9370 9.8 10.3 95 9.1 13.2 69
Owl Creek 8975 4.9 5.4 91 7.1 6.3 113
South Pass 9040 15.3 15.8 97 12.8 17.9 72
St. Lawrence Alt 8620 -M 6.7 * -M 9.3 *
Togwotee Pass 9580 24.9 22.8 109 25.8 24.7 104
Townsend Creek 8700 11.4 10.0 114 12.3 12.7 97
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Basin Index (%) 107 91
BIGHORN BASIN
Bald Mtn. 9380 17.1 19.3 89 12.6 17.5 72
Bear Trap Meadow 8200 5.7 4.6 124 6.9 8.9 78
Bone Springs Div 9350 12.5 17.0 74 11.5 16.0 72
Grave Springs 8550 8.4 9.6 88 9.6 11.0 87
Kirwin 9550 10.9 9.9 110 11.7 11.9 98
Marquette 8760 8.1 -M * 9.9 -M *
Middle Powder 7760 8.2 12.4 66 8.1 12.2 66
Owl Creek 8975 4.9 5.4 91 7.1 6.3 113
Powder River Pass 9480 9.9 10.3 96 -M 13.0 *
Shell Creek 9580 13.2 15.6 85 10.9 14.2 77
Timber Creek 7950 3.4 5.2 65 6.9 7.7 90
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Basin Index (%) 86 81
SHOSHONE RIVER
Blackwater 9780 25.5 23.5 109 25.7 21.0 122
Evening Star 9200 27.0 24.4 111 29.7 27.8 107
Marquette 8760 8.1 -M * 9.9 -M *
Sylvan Lake 8420 21.7 19.8 110 28.1 22.7 124
Sylvan Road 7120 9.0 10.4 87 16.4 16.9 97
Younts Peak 8350 -M 14.6 * -M 16.0 *
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Basin Index (%) 107 113
POWDER RIVER
Bear Trap Meadow 8200 5.7 4.6 124 6.9 8.9 78
Cloud Peak Reservoir 9860 11.8 15.3 77 10.9 14.0 78
Grave Springs 8550 8.4 9.6 88 9.6 11.0 87
Hansen Sawmill 8360 5.7 6.1 93 8.2 9.0 91
Middle Powder 7760 8.2 12.4 66 8.1 12.2 66
Powder River Pass 9480 9.9 10.3 96 -M 13.0 *
Soldier Park 8720 3.3 -M * 7.1 -M *
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Basin Index (%) 85 79
TONGUE RIVER
Big Goose 7990 8.0 9.9 81 10.1 12.0 84
Bone Springs Div 9350 12.5 17.0 74 11.5 16.0 72
Burgess Junction 7880 8.8 12.2 72 8.6 12.9 67
Dome Lake 8880 7.5 12.0 62 8.4 14.2 59
Little Goose 8870 9.4 -M * 8.1 -M *
Sucker Creek 8880 10.7 12.6 85 9.7 15.0 65
Tie Creek 6870 3.8 5.1 75 10.7 12.1 88
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Basin Index (%) 75 72
BELLE FOURCHE
Blind Park 6890 3.8 5.8 66 7.7 12.4 62
Cole Canyon 5910 5.5 3.8 145 12.8 9.9 129
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Basin Index (%) 97 92
CHEYENNE RIVER BASIN
Blind Park 6890 3.8 5.8 66 7.7 12.4 62
North Rapid Creek 6130 4.7 5.9 80 7.6 10.3 74
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Basin Index (%) 73 67
UPPER N. PLATTE
Arapaho Ridge 10960 26.4 21.5 123 26.8 23.6 114
Blackhall Mtn 9820 33.4 -M * 34.5 -M *
Columbine 9160 27.1 22.6 120 29.3 26.2 112
Divide Peak 8880 21.7 20.3 107 24.1 22.0 110
Joe Wright 10120 23.0 22.0 105 30.9 26.7 116
Laprele Creek 8375 13.9 9.3 149 14.8 13.0 114
Med Bow 10500 37.5 -M * 35.0 -M *
Never Summer 10280 22.8 20.5 111 19.8 -M *
North French Creek 10130 29.9 31.2 96 30.8 27.5 112
Old Battle 10000 37.0 32.1 115 37.1 35.8 104
Rawah 9020 12.6 10.0 126 17.8 15.0 119
Sage Creek Basin 7850 18.6 9.9 188 16.6 15.0 111
Sand Lake 10050 29.7 30.1 99 24.7 25.6 96
South Brush Creek 8440 9.3 11.3 82 12.5 15.8 79
Tower 10500 52.7 47.2 112 45.5 40.8 112
Webber Springs 9250 26.3 23.4 112 31.7 27.4 116
Whiskey Park 8950 31.3 27.5 114 33.2 28.5 116
Willow Creek Pass 9540 16.8 12.6 133 18.2 13.9 131
Zirkel 9340 33.0 24.7 134 38.5 29.1 132
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Basin Index (%) 115 112
SWEETWATER
Deer Park 9700 17.0 16.2 105 18.7 20.5 91
Larsen Creek 9000 9.5 11.0 86 14.5 -M *
South Pass 9040 15.3 15.8 97 12.8 17.9 72
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Basin Index (%) 97 82
LOWER N. PLATTE
Casper Mtn. 7900 16.2 14.5 112 13.1 15.7 83
Laprele Creek 8375 13.9 9.3 149 14.8 13.0 114
Reno Hill 8400 17.1 14.2 120 17.9 16.2 110
Windy Peak 7900 10.4 7.5 139 11.7 11.0 106
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Basin Index (%) 127 103
LARAMIE RIVER
Brooklyn Lake 10240 24.4 22.3 109 26.0 21.8 119
Cinnabar Park 9574 20.8 21.3 98 24.0 24.8 97
Crow Creek 8330 5.0 5.5 91 11.1 11.4 97
Deadman Hill 10220 22.0 16.6 133 20.6 18.0 114
Rawah 9020 12.6 10.0 126 17.8 15.0 119
Roach 9700 17.9 16.5 108 22.3 19.9 112
Windy Peak 7900 10.4 7.5 139 11.7 11.0 106
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Basin Index (%) 113 110
S. PLATTE
Black Mountain 8920 12.5 -M * 14.2 -M *
Crow Creek 8330 5.0 5.5 91 11.1 11.4 97
Deadman Hill 10220 22.0 16.6 133 20.6 18.0 114
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Basin Index (%) 122 108
LITTLE SNAKE RIVER
Battle Mountain 7440 10.0 7.7 130 17.0 15.4 110
Divide Peak 8880 21.7 20.3 107 24.1 22.0 110
Elk River 8700 18.6 17.8 104 20.5 20.6 100
Little Snake River 8915 28.6 26.0 110 38.1 30.7 124
Old Battle 10000 37.0 32.1 115 37.1 35.8 104
Sage Creek Basin 7850 18.6 9.9 188 16.6 15.0 111
Sandstone RS 8150 14.7 12.4 119 19.0 18.8 101
Whiskey Park 8950 31.3 27.5 114 33.2 28.5 116
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Basin Index (%) 117 110
UPPER GREEN RIVER
Big Sandy Opening 9080 14.0 12.9 109 14.8 13.6 109
Blind Bull Sum 8650 24.4 23.7 103 19.1 19.7 97
East Rim Divide 7930 10.2 10.1 101 11.7 11.9 98
Elkhart Park G.S. 9400 13.5 12.2 111 14.0 13.6 103
Gros Ventre Summit 8750 8.5 12.9 66 12.6 13.2 95
Gunsight Pass 9820 13.6 13.6 100 16.1 14.1 114
Indian Creek 9425 23.4 24.3 96 18.7 22.9 82
Kendall R.S. 7740 9.8 10.4 94 11.6 14.3 81
Loomis Park 8240 15.2 13.7 111 16.9 17.5 97
New Fork Lake 8340 9.9 9.8 101 9.8 10.9 90
Pocket Creek 9360 14.8 -M * 15.3 -M *
Snider Basin 8060 10.4 12.0 87 13.3 14.4 92
Spring Creek Divide 9000 23.2 23.0 101 23.8 24.1 99
Triple Peak 8500 24.4 20.3 120 25.7 25.6 100
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Basin Index (%) 101 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.8 -M * 14.4 -M *
Buck Pasture 9632 16.5 -M * 20.9 -M *
EF Blacks Fork GS 9360 13.3 -M * 13.0 -M *
Hams Fork 7840 9.5 9.2 103 11.9 11.6 103
Hewinta 9500 12.9 10.3 125 16.5 14.5 114
Hickerson Park 9122 10.3 7.2 143 12.8 10.6 121
Hole-in-Rock 9168 7.8 7.1 110 11.7 10.1 116
Indian Creek 9425 23.4 24.3 96 18.7 22.9 82
Kelley R.S. 8180 15.2 14.0 109 16.3 18.3 89
Spirit Lk 10235 17.6 -M * 18.4 -M *
Steel Creek Park 10158 17.7 16.1 110 20.5 17.1 120
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Basin Index (%) 110 103
UPPER BEAR RIVER
Bear River RS 8777 11.1 -M * 16.7 -M *
Bug Lake 7987 23.8 19.2 124 24.0 19.8 121
Burts Miller Ranch 8000 6.2 -M * 9.7 -M *
Chalk Creek #1 9171 28.1 24.8 113 31.7 25.9 122
Hayden Fork 9130 16.9 14.4 117 25.1 21.6 116
Kelley R.S. 8180 15.2 14.0 109 16.3 18.3 89
Lily Lake 9133 14.4 12.7 113 17.8 17.7 101
Monte Cristo 8932 34.9 27.8 126 32.5 26.5 123
Salt River Summit 7640 13.8 11.8 117 16.7 16.9 99
Spring Creek Divide 9000 23.2 23.0 101 23.8 24.1 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.