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 THURSDAY: APRIL 11 , 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 14.7 118 22.0 21.0 105
Black Bear 8170 42.1 36.7 115 45.3 38.4 118
Blind Bull Sum 8650 24.3 23.5 103 19.0 19.6 97
Cottonwood Creek 7670 21.2 20.7 102 26.4 24.8 106
East Rim Divide 7930 10.5 10.2 103 11.8 11.8 100
Grand Targhee 9260 45.2 39.6 114 32.2 31.2 103
Granite Creek 6770 17.0 13.6 125 21.0 19.7 107
Grassy Lake 7265 33.3 31.4 106 38.1 36.1 106
Gros Ventre Summit 8750 9.7 12.8 76 12.5 13.1 95
Gunsight Pass 9820 13.5 13.8 98 16.0 14.1 113
Lewis Lake Divide 7850 36.5 30.2 121 39.3 35.6 110
Phillips Bench 8200 28.9 25.8 112 32.8 28.3 116
Salt River Summit 7640 13.6 12.3 111 16.6 16.8 99
Snake River Station 6920 17.8 14.2 125 25.8 22.6 114
Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100
Thumb Divide 7980 19.4 14.6 133 19.6 18.8 104
Togwotee Pass 9580 24.5 22.6 108 25.4 24.5 104
Two Ocean Plateau 9240 31.8 26.6 120 26.7 27.4 97
Willow Creek 8080 32.3 27.8 116 35.9 33.9 106
Younts Peak 8350 -M 14.5 * -M 15.9 *
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Basin Index (%) 112 106
MADISON-GALLATIN
Black Bear 8170 42.1 36.7 115 45.3 38.4 118
Canyon 7870 13.8 12.3 112 16.8 16.3 103
Madison Plateau 7750 31.2 22.0 142 29.1 26.4 110
West Yellowstone 6700 11.6 8.8 132 18.0 14.2 127
Whiskey Creek 6800 19.0 14.7 129 21.9 20.3 108
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Basin Index (%) 125 113
YELLOWSTONE
Beartooth Lake 9360 21.9 21.7 101 20.2 19.9 102
Burnt Mtn 5880 6.7 3.0 223 14.0 13.2 106
Canyon 7870 13.8 12.3 112 16.8 16.3 103
Cole Creek 7850 16.9 15.2 111 -M 13.3 *
Evening Star 9200 27.0 24.1 112 29.7 27.6 108
Fisher Creek 9100 34.1 31.5 108 35.9 31.8 113
Northeast Entrance 7350 9.3 8.6 108 15.0 12.3 122
Parker Peak 9400 24.6 20.0 123 24.7 17.8 139
Sylvan Lake 8420 21.6 19.7 110 27.9 22.5 124
Thumb Divide 7980 19.4 14.6 133 19.6 18.8 104
Two Ocean Plateau 9240 31.8 26.6 120 26.7 27.4 97
White Mill 8700 25.1 22.9 110 21.4 23.9 90
Wolverine 7650 9.8 9.4 104 12.9 12.3 105
Younts Peak 8350 -M 14.5 * -M 15.9 *
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Basin Index (%) 114 109
WIND RIVER
Burroughs Creek 8750 11.3 -M * 13.1 -M *
Castle Creek 8400 3.4 -M * 6.3 -M *
Cold Springs 9630 7.5 6.3 119 8.1 10.2 79
Deer Park 9700 16.6 16.1 103 18.4 20.4 90
Hobbs Park 10100 16.5 14.6 113 12.9 13.8 93
Kirwin 9550 11.0 9.7 113 11.5 11.7 98
Little Warm 9370 9.8 10.2 96 9.4 13.0 72
Owl Creek 8975 4.1 5.7 72 6.5 6.2 105
South Pass 9040 15.2 15.6 97 12.4 17.7 70
St. Lawrence Alt 8620 -M 6.9 * -M 9.2 *
Togwotee Pass 9580 24.5 22.6 108 25.4 24.5 104
Townsend Creek 8700 11.2 9.9 113 12.1 12.4 98
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Basin Index (%) 105 90
BIGHORN BASIN
Bald Mtn. 9380 17.0 19.3 88 12.3 17.3 71
Bear Trap Meadow 8200 5.6 4.7 119 6.9 8.8 78
Bone Springs Div 9350 12.7 17.0 75 11.2 15.8 71
Grave Springs 8550 8.5 9.5 89 9.7 11.0 88
Kirwin 9550 11.0 9.7 113 11.5 11.7 98
Marquette 8760 7.8 -M * 9.6 -M *
Middle Powder 7760 8.2 12.3 67 7.9 12.0 66
Owl Creek 8975 4.1 5.7 72 6.5 6.2 105
Powder River Pass 9480 10.0 10.3 97 -M 12.9 *
Shell Creek 9580 13.2 15.5 85 10.9 14.0 78
Timber Creek 7950 3.0 5.1 59 6.5 7.6 86
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Basin Index (%) 86 80
SHOSHONE RIVER
Blackwater 9780 25.0 23.1 108 25.3 20.8 122
Evening Star 9200 27.0 24.1 112 29.7 27.6 108
Marquette 8760 7.8 -M * 9.6 -M *
Sylvan Lake 8420 21.6 19.7 110 27.9 22.5 124
Sylvan Road 7120 8.8 10.4 85 16.2 16.8 96
Younts Peak 8350 -M 14.5 * -M 15.9 *
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Basin Index (%) 107 113
POWDER RIVER
Bear Trap Meadow 8200 5.6 4.7 119 6.9 8.8 78
Cloud Peak Reservoir 9860 11.9 15.2 78 10.9 13.7 80
Grave Springs 8550 8.5 9.5 89 9.7 11.0 88
Hansen Sawmill 8360 5.7 6.1 93 8.1 8.8 92
Middle Powder 7760 8.2 12.3 67 7.9 12.0 66
Powder River Pass 9480 10.0 10.3 97 -M 12.9 *
Soldier Park 8720 3.3 -M * 7.2 -M *
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Basin Index (%) 86 80
TONGUE RIVER
Big Goose 7990 8.1 9.9 82 10.2 11.9 86
Bone Springs Div 9350 12.7 17.0 75 11.2 15.8 71
Burgess Junction 7880 8.8 12.2 72 8.6 12.7 68
Dome Lake 8880 7.3 11.9 61 8.2 14.0 59
Little Goose 8870 9.4 -M * 8.1 -M *
Sucker Creek 8880 10.7 12.5 86 9.7 14.8 66
Tie Creek 6870 3.9 5.3 74 10.9 12.1 90
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Basin Index (%) 75 72
BELLE FOURCHE
Blind Park 6890 3.6 6.4 56 7.7 12.2 63
Cole Canyon 5910 5.4 4.3 126 12.6 9.7 130
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Basin Index (%) 84 93
CHEYENNE RIVER BASIN
Blind Park 6890 3.6 6.4 56 7.7 12.2 63
North Rapid Creek 6130 4.3 6.2 69 7.4 10.2 73
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Basin Index (%) 63 67
UPPER N. PLATTE
Arapaho Ridge 10960 26.3 21.3 123 26.4 23.2 114
Blackhall Mtn 9820 32.8 -M * 33.9 -M *
Columbine 9160 26.5 23.0 115 28.5 25.9 110
Divide Peak 8880 21.5 20.3 106 24.0 21.8 110
Joe Wright 10120 22.5 21.8 103 30.6 26.2 117
Laprele Creek 8375 12.7 9.4 135 14.7 12.8 115
Med Bow 10500 36.1 -M * 34.6 -M *
Never Summer 10280 21.9 20.5 107 19.4 -M *
North French Creek 10130 29.9 30.7 97 30.4 27.2 112
Old Battle 10000 36.8 31.9 115 37.1 35.5 105
Rawah 9020 12.2 10.4 117 17.5 14.8 118
Sage Creek Basin 7850 18.6 10.8 172 16.5 14.9 111
Sand Lake 10050 29.4 29.8 99 24.6 25.2 98
South Brush Creek 8440 8.9 11.6 77 12.3 15.6 79
Tower 10500 51.8 46.9 110 45.5 40.3 113
Webber Springs 9250 25.9 23.3 111 31.5 27.1 116
Whiskey Park 8950 30.9 27.6 112 33.0 28.3 117
Willow Creek Pass 9540 16.7 12.5 134 17.7 13.7 129
Zirkel 9340 32.9 25.5 129 38.0 29.0 131
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Basin Index (%) 113 112
SWEETWATER
Deer Park 9700 16.6 16.1 103 18.4 20.4 90
Larsen Creek 9000 9.5 11.2 85 14.4 -M *
South Pass 9040 15.2 15.6 97 12.4 17.7 70
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Basin Index (%) 96 81
LOWER N. PLATTE
Casper Mtn. 7900 16.0 14.5 110 12.9 15.4 84
Laprele Creek 8375 12.7 9.4 135 14.7 12.8 115
Reno Hill 8400 16.7 14.2 118 17.5 15.9 110
Windy Peak 7900 9.7 7.6 128 11.6 10.8 107
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Basin Index (%) 121 103
LARAMIE RIVER
Brooklyn Lake 10240 24.1 22.3 108 25.6 21.5 119
Cinnabar Park 9574 20.5 21.4 96 23.8 24.6 97
Crow Creek 8330 4.8 6.3 76 10.9 11.3 96
Deadman Hill 10220 21.5 16.5 130 20.1 17.7 114
Rawah 9020 12.2 10.4 117 17.5 14.8 118
Roach 9700 17.6 16.6 106 22.1 19.6 113
Windy Peak 7900 9.7 7.6 128 11.6 10.8 107
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Basin Index (%) 109 109
S. PLATTE
Black Mountain 8920 12.0 -M * 13.8 -M *
Crow Creek 8330 4.8 6.3 76 10.9 11.3 96
Deadman Hill 10220 21.5 16.5 130 20.1 17.7 114
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Basin Index (%) 115 107
LITTLE SNAKE RIVER
Battle Mountain 7440 9.9 8.4 118 16.8 15.2 111
Divide Peak 8880 21.5 20.3 106 24.0 21.8 110
Elk River 8700 18.4 18.4 100 19.9 20.4 98
Little Snake River 8915 28.4 26.0 109 38.0 30.5 125
Old Battle 10000 36.8 31.9 115 37.1 35.5 105
Sage Creek Basin 7850 18.6 10.8 172 16.5 14.9 111
Sandstone RS 8150 14.5 12.6 115 18.9 18.6 102
Whiskey Park 8950 30.9 27.6 112 33.0 28.3 117
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Basin Index (%) 115 110
UPPER GREEN RIVER
Big Sandy Opening 9080 13.9 12.9 108 14.7 13.5 109
Blind Bull Sum 8650 24.3 23.5 103 19.0 19.6 97
East Rim Divide 7930 10.5 10.2 103 11.8 11.8 100
Elkhart Park G.S. 9400 13.5 12.3 110 13.9 13.5 103
Gros Ventre Summit 8750 9.7 12.8 76 12.5 13.1 95
Gunsight Pass 9820 13.5 13.8 98 16.0 14.1 113
Indian Creek 9425 23.3 24.8 94 18.6 22.7 82
Kendall R.S. 7740 10.0 10.9 92 11.7 14.3 82
Loomis Park 8240 15.0 13.7 109 16.9 17.4 97
New Fork Lake 8340 10.0 10.1 99 9.7 10.9 89
Pocket Creek 9360 14.8 -M * 15.3 -M *
Snider Basin 8060 10.4 12.2 85 13.3 14.3 93
Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100
Triple Peak 8500 24.2 21.0 115 25.5 25.5 100
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Basin Index (%) 100 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.0 -M * 14.1 -M *
Buck Pasture 9632 16.1 -M * 20.2 -M *
EF Blacks Fork GS 9360 13.0 -M * 12.4 -M *
Hams Fork 7840 9.5 9.7 98 11.8 11.5 103
Hewinta 9500 -M 10.6 * 16.4 14.4 114
Hickerson Park 9122 9.9 7.7 129 12.8 10.5 122
Hole-in-Rock 9168 7.7 7.1 108 11.7 10.0 117
Indian Creek 9425 23.3 24.8 94 18.6 22.7 82
Kelley R.S. 8180 15.1 14.3 106 16.3 18.2 90
Spirit Lk 10235 17.3 -M * 17.9 -M *
Steel Creek Park 10158 17.3 16.0 108 20.2 16.9 120
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Basin Index (%) 104 103
UPPER BEAR RIVER
Bear River RS 8777 10.7 -M * 16.5 -M *
Bug Lake 7987 23.7 19.0 125 24.0 19.6 122
Burts Miller Ranch 8000 5.9 -M * 9.6 -M *
Chalk Creek #1 9171 27.7 24.7 112 31.1 25.6 121
Hayden Fork 9130 16.5 14.9 111 24.7 21.4 115
Kelley R.S. 8180 15.1 14.3 106 16.3 18.2 90
Lily Lake 9133 14.3 12.7 113 17.6 17.5 101
Monte Cristo 8932 34.9 27.9 125 32.2 26.3 122
Salt River Summit 7640 13.6 12.3 111 16.6 16.8 99
Spring Creek Divide 9000 23.4 22.7 103 23.8 23.9 100
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Basin Index (%) 114 110
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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.