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 TUESDAY: APRIL 9 , 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 15.1 115 21.2 20.8 102
Black Bear 8170 42.6 36.9 115 44.1 38.0 116
Blind Bull Sum 8650 23.8 23.4 102 18.6 19.4 96
Cottonwood Creek 7670 20.4 20.9 98 25.4 24.5 104
East Rim Divide 7930 10.6 10.2 104 11.6 11.7 99
Grand Targhee 9260 43.6 39.0 112 31.7 30.8 103
Granite Creek 6770 17.1 14.1 121 20.2 19.6 103
Grassy Lake 7265 34.2 31.4 109 37.5 35.8 105
Gros Ventre Summit 8750 8.9 12.8 70 11.7 12.9 91
Gunsight Pass 9820 12.7 13.9 91 15.2 13.9 109
Lewis Lake Divide 7850 36.0 30.1 120 38.4 35.2 109
Phillips Bench 8200 28.5 25.6 111 31.6 28.0 113
Salt River Summit 7640 13.0 12.6 103 16.1 16.6 97
Snake River Station 6920 19.0 14.6 130 25.5 22.4 114
Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99
Thumb Divide 7980 19.1 14.7 130 19.0 18.5 103
Togwotee Pass 9580 23.6 22.3 106 24.5 24.2 101
Two Ocean Plateau 9240 30.7 26.3 117 25.8 27.1 95
Willow Creek 8080 31.7 28.3 112 34.4 33.5 103
Younts Peak 8350 -M 14.5 * -M 15.7 *
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Basin Index (%) 110 104
MADISON-GALLATIN
Black Bear 8170 42.6 36.9 115 44.1 38.0 116
Canyon 7870 13.6 12.4 110 16.3 16.1 101
Madison Plateau 7750 29.0 21.7 134 28.4 26.2 108
West Yellowstone 6700 12.3 9.1 135 17.7 14.1 126
Whiskey Creek 6800 19.7 14.8 133 21.1 20.0 106
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Basin Index (%) 123 112
YELLOWSTONE
Beartooth Lake 9360 21.3 21.5 99 19.5 19.6 99
Burnt Mtn 5880 6.0 4.0 150 12.7 13.1 97
Canyon 7870 13.6 12.4 110 16.3 16.1 101
Cole Creek 7850 15.3 14.9 103 -M 13.1 *
Evening Star 9200 26.3 23.9 110 28.8 27.2 106
Fisher Creek 9100 -M 31.3 * -M 31.4 *
Northeast Entrance 7350 9.4 8.8 107 14.6 12.2 120
Parker Peak 9400 23.7 19.7 120 23.9 17.6 136
Sylvan Lake 8420 21.4 19.5 110 27.2 22.2 123
Thumb Divide 7980 19.1 14.7 130 19.0 18.5 103
Two Ocean Plateau 9240 30.7 26.3 117 25.8 27.1 95
White Mill 8700 24.5 22.5 109 20.7 23.6 88
Wolverine 7650 10.2 9.6 106 12.7 12.2 104
Younts Peak 8350 -M 14.5 * -M 15.7 *
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Basin Index (%) 112 106
WIND RIVER
Burroughs Creek 8750 10.4 -M * 12.5 -M *
Castle Creek 8400 3.3 -M * 5.7 -M *
Cold Springs 9630 6.7 6.5 103 7.5 10.0 75
Deer Park 9700 15.2 16.0 95 17.4 20.0 87
Hobbs Park 10100 14.0 14.3 98 11.0 13.6 81
Kirwin 9550 10.2 9.6 106 10.9 11.6 94
Little Warm 9370 9.1 10.3 88 9.3 12.9 72
Owl Creek 8975 3.9 5.8 67 5.9 6.1 97
South Pass 9040 13.3 15.5 86 11.4 17.5 65
St. Lawrence Alt 8620 -M 6.9 * -M 9.0 *
Togwotee Pass 9580 23.6 22.3 106 24.5 24.2 101
Townsend Creek 8700 9.5 9.8 97 10.7 12.2 88
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Basin Index (%) 96 85
BIGHORN BASIN
Bald Mtn. 9380 16.0 19.2 83 12.0 17.0 71
Bear Trap Meadow 8200 5.8 4.8 121 7.0 8.7 80
Bone Springs Div 9350 12.2 17.0 72 11.0 15.6 71
Grave Springs 8550 7.8 9.5 82 9.0 10.7 84
Kirwin 9550 10.2 9.6 106 10.9 11.6 94
Marquette 8760 7.1 -M * 8.9 -M *
Middle Powder 7760 7.5 12.2 61 7.1 11.8 60
Owl Creek 8975 3.9 5.8 67 5.9 6.1 97
Powder River Pass 9480 9.2 10.3 89 10.1 12.7 80
Shell Creek 9580 12.7 15.3 83 11.0 13.8 80
Timber Creek 7950 3.0 5.1 59 5.9 7.4 80
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Basin Index (%) 81 78
SHOSHONE RIVER
Blackwater 9780 24.0 22.8 105 24.4 20.5 119
Evening Star 9200 26.3 23.9 110 28.8 27.2 106
Marquette 8760 7.1 -M * 8.9 -M *
Sylvan Lake 8420 21.4 19.5 110 27.2 22.2 123
Sylvan Road 7120 9.1 10.6 86 15.6 16.6 94
Younts Peak 8350 -M 14.5 * -M 15.7 *
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Basin Index (%) 105 111
POWDER RIVER
Bear Trap Meadow 8200 5.8 4.8 121 7.0 8.7 80
Cloud Peak Reservoir 9860 11.0 15.0 73 10.4 13.5 77
Grave Springs 8550 7.8 9.5 82 9.0 10.7 84
Hansen Sawmill 8360 5.1 6.1 84 7.1 8.7 82
Middle Powder 7760 7.5 12.2 61 7.1 11.8 60
Powder River Pass 9480 9.2 10.3 89 10.1 12.7 80
Soldier Park 8720 3.5 -M * 6.6 -M *
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Basin Index (%) 80 77
TONGUE RIVER
Big Goose 7990 7.5 9.8 77 9.4 11.7 80
Bone Springs Div 9350 12.2 17.0 72 11.0 15.6 71
Burgess Junction 7880 8.1 12.0 68 8.4 12.4 68
Dome Lake 8880 6.7 11.8 57 7.8 13.8 57
Little Goose 8870 8.7 -M * 7.5 -M *
Sucker Creek 8880 10.1 12.4 81 9.7 14.5 67
Tie Creek 6870 3.0 5.5 55 9.6 11.9 81
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Basin Index (%) 69 70
BELLE FOURCHE
Blind Park 6890 3.7 6.8 54 7.5 12.0 62
Cole Canyon 5910 4.0 4.6 87 10.8 9.6 112
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Basin Index (%) 68 85
CHEYENNE RIVER BASIN
Blind Park 6890 3.7 6.8 54 7.5 12.0 62
North Rapid Creek 6130 4.2 6.4 66 6.9 10.0 69
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Basin Index (%) 60 65
UPPER N. PLATTE
Arapaho Ridge 10960 25.4 21.1 120 25.8 22.8 113
Blackhall Mtn 9820 32.8 -M * 33.5 -M *
Columbine 9160 28.4 23.3 122 28.7 25.6 112
Divide Peak 8880 21.9 20.1 109 23.9 21.5 111
Joe Wright 10120 22.0 21.5 102 29.9 25.9 115
Laprele Creek 8375 12.8 9.4 136 14.7 12.6 117
Med Bow 10500 36.9 -M * 34.4 -M *
Never Summer 10280 -M 20.4 * 18.9 -M *
North French Creek 10130 30.4 30.0 101 30.4 26.9 113
Old Battle 10000 36.8 31.6 116 37.1 35.2 105
Rawah 9020 12.2 10.6 115 17.5 14.6 120
Sage Creek Basin 7850 18.4 11.4 161 16.6 14.7 113
Sand Lake 10050 29.6 29.3 101 24.6 25.0 98
South Brush Creek 8440 9.3 11.8 79 12.4 15.3 81
Tower 10500 51.5 46.3 111 45.3 40.0 113
Webber Springs 9250 26.0 23.2 112 31.6 26.8 118
Whiskey Park 8950 31.7 27.6 115 32.9 28.1 117
Willow Creek Pass 9540 16.3 12.3 133 17.4 13.5 129
Zirkel 9340 33.9 26.1 130 37.5 28.6 131
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Basin Index (%) 114 113
SWEETWATER
Deer Park 9700 15.2 16.0 95 17.4 20.0 87
Larsen Creek 9000 9.8 11.4 86 14.2 -M *
South Pass 9040 13.3 15.5 86 11.4 17.5 65
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Basin Index (%) 89 77
LOWER N. PLATTE
Casper Mtn. 7900 15.3 14.4 106 12.6 15.2 83
Laprele Creek 8375 12.8 9.4 136 14.7 12.6 117
Reno Hill 8400 16.5 14.1 117 17.6 15.7 112
Windy Peak 7900 10.2 7.6 134 11.9 10.6 112
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Basin Index (%) 120 105
LARAMIE RIVER
Brooklyn Lake 10240 24.1 22.1 109 25.5 21.2 120
Cinnabar Park 9574 20.3 21.4 95 23.6 24.3 97
Crow Creek 8330 5.2 6.8 76 10.5 11.0 95
Deadman Hill 10220 21.3 16.3 131 20.0 17.4 115
Rawah 9020 12.2 10.6 115 17.5 14.6 120
Roach 9700 17.6 16.6 106 21.9 19.3 113
Windy Peak 7900 10.2 7.6 134 11.9 10.6 112
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Basin Index (%) 109 111
S. PLATTE
Black Mountain 8920 11.6 -M * 13.0 -M *
Crow Creek 8330 5.2 6.8 76 10.5 11.0 95
Deadman Hill 10220 21.3 16.3 131 20.0 17.4 115
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Basin Index (%) 115 107
LITTLE SNAKE RIVER
Battle Mountain 7440 10.4 9.0 116 16.7 15.1 111
Divide Peak 8880 21.9 20.1 109 23.9 21.5 111
Elk River 8700 18.6 18.9 98 19.6 20.1 98
Little Snake River 8915 28.8 25.8 112 37.8 30.1 126
Old Battle 10000 36.8 31.6 116 37.1 35.2 105
Sage Creek Basin 7850 18.4 11.4 161 16.6 14.7 113
Sandstone RS 8150 15.0 12.7 118 18.9 18.4 103
Whiskey Park 8950 31.7 27.6 115 32.9 28.1 117
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Basin Index (%) 116 111
UPPER GREEN RIVER
Big Sandy Opening 9080 13.1 12.8 102 14.4 13.3 108
Blind Bull Sum 8650 23.8 23.4 102 18.6 19.4 96
East Rim Divide 7930 10.6 10.2 104 11.6 11.7 99
Elkhart Park G.S. 9400 13.3 12.3 108 13.8 13.3 104
Gros Ventre Summit 8750 8.9 12.8 70 11.7 12.9 91
Gunsight Pass 9820 12.7 13.9 91 15.2 13.9 109
Indian Creek 9425 23.1 24.8 93 18.2 22.5 81
Kendall R.S. 7740 10.2 11.2 91 11.5 14.1 82
Loomis Park 8240 14.8 13.8 107 16.7 17.3 97
New Fork Lake 8340 9.9 10.2 97 9.7 10.8 90
Pocket Creek 9360 14.5 -M * 15.3 -M *
Snider Basin 8060 10.8 12.3 88 13.5 14.1 96
Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99
Triple Peak 8500 23.9 21.6 111 25.0 25.2 99
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Basin Index (%) 98 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.2 -M * 12.3 -M *
Buck Pasture 9632 14.1 -M * 18.2 -M *
EF Blacks Fork GS 9360 10.5 -M * 10.5 -M *
Hams Fork 7840 9.4 10.3 91 11.6 11.4 102
Hewinta 9500 9.9 10.8 92 14.2 14.1 101
Hickerson Park 9122 8.8 7.9 111 10.9 10.3 106
Hole-in-Rock 9168 6.3 7.1 89 10.1 9.8 103
Indian Creek 9425 23.1 24.8 93 18.2 22.5 81
Kelley R.S. 8180 14.9 14.5 103 15.8 18.1 87
Spirit Lk 10235 15.5 -M * 16.4 -M *
Steel Creek Park 10158 14.4 15.9 91 17.4 16.6 105
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Basin Index (%) 95 96
UPPER BEAR RIVER
Bear River RS 8777 9.0 -M * 14.5 -M *
Bug Lake 7987 23.2 18.7 124 23.4 19.4 121
Burts Miller Ranch 8000 4.5 -M * 8.3 -M *
Chalk Creek #1 9171 24.8 24.5 101 29.1 25.3 115
Hayden Fork 9130 14.6 15.2 96 22.5 21.2 106
Kelley R.S. 8180 14.9 14.5 103 15.8 18.1 87
Lily Lake 9133 11.9 12.8 93 15.7 17.3 91
Monte Cristo 8932 33.8 27.8 122 31.4 26.0 121
Salt River Summit 7640 13.0 12.6 103 16.1 16.6 97
Spring Creek Divide 9000 23.0 22.6 102 23.4 23.7 99
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Basin Index (%) 107 106
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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.