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 11 , 2020
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 16.5 14.7 112 19.3 21.0 92
Black Bear 8170 -M 36.7 * 33.6 38.4 88
Blind Bull Sum 8650 26.5 23.5 113 16.2 19.6 83
Cottonwood Creek 7670 24.1 20.7 116 29.6 24.8 119
East Rim Divide 7930 11.0 10.2 108 10.1 11.8 86
Grand Targhee 9260 44.6 39.6 113 29.5 31.2 95
Granite Creek 6770 18.0 13.6 132 17.1 19.7 87
Grassy Lake 7265 34.8 31.4 111 34.9 36.1 97
Gros Ventre Summit 8750 12.9 12.8 101 12.7 13.1 97
Gunsight Pass 9820 13.2 13.8 96 13.7 14.1 97
Lewis Lake Divide 7850 28.4 30.2 94 32.6 35.6 92
Phillips Bench 8200 -M 25.8 * -M 28.3 *
Salt River Summit 7640 14.7 12.3 120 16.3 16.8 97
Snake River Station 6920 17.5 14.2 123 22.7 22.6 100
Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106
Thumb Divide 7980 18.0 14.6 123 17.6 18.8 94
Togwotee Pass 9580 28.1 22.6 124 27.6 24.5 113
Two Ocean Plateau 9240 33.1 26.6 124 26.9 27.4 98
Willow Creek 8080 39.0 27.8 140 36.4 33.9 107
Younts Peak 8350 18.1 14.5 125 15.0 15.9 94
----- -----
Basin Index (%) 116 97
MADISON-GALLATIN
Black Bear 8170 -M 36.7 * 33.6 38.4 88
Canyon 7870 15.3 12.3 124 15.8 16.3 97
Madison Plateau 7750 23.0 22.0 105 20.4 26.4 77
West Yellowstone 6700 -M 8.8 * -M 14.2 *
Whiskey Creek 6800 16.4 14.7 112 18.3 20.3 90
----- -----
Basin Index (%) 112 87
YELLOWSTONE
Beartooth Lake 9360 24.3 21.7 112 22.7 19.9 114
Burnt Mtn 5880 7.9 3.0 263 14.7 13.2 111
Canyon 7870 15.3 12.3 124 15.8 16.3 97
Cole Creek 7850 17.6 15.2 116 13.6 13.3 102
Evening Star 9200 28.5 24.1 118 30.9 27.6 112
Fisher Creek 9100 33.9 31.5 108 34.8 31.8 109
Northeast Entrance 7350 10.4 8.6 121 13.1 12.3 107
Parker Peak 9400 27.4 20.0 137 24.9 17.8 140
Sylvan Lake 8420 22.7 19.7 115 24.7 22.5 110
Thumb Divide 7980 18.0 14.6 123 17.6 18.8 94
Two Ocean Plateau 9240 33.1 26.6 124 26.9 27.4 98
White Mill 8700 27.6 22.9 121 23.1 23.9 97
Wolverine 7650 12.4 9.4 132 13.6 12.3 111
Younts Peak 8350 18.1 14.5 125 15.0 15.9 94
----- -----
Basin Index (%) 122 107
WIND RIVER
Burroughs Creek 8750 13.7 -M * 14.3 -M *
Castle Creek 8400 5.1 -M * 7.0 -M *
Cold Springs 9630 7.2 6.3 114 7.5 10.2 74
Deer Park 9700 14.0 16.1 87 13.7 20.4 67
Hobbs Park 10100 13.9 14.6 95 12.4 13.8 90
Kirwin 9550 -M 9.7 * 11.2 11.7 96
Little Warm 9370 12.3 10.2 121 10.6 13.0 82
Owl Creek 8975 5.8 5.7 102 7.2 6.2 116
South Pass 9040 12.0 15.6 77 11.4 17.7 64
St. Lawrence Alt 8620 4.8 6.9 70 7.5 9.2 82
Togwotee Pass 9580 28.1 22.6 124 27.6 24.5 113
Townsend Creek 8700 9.2 9.9 93 10.0 12.4 81
----- -----
Basin Index (%) 99 86
BIGHORN BASIN
Bald Mtn. 9380 20.7 19.3 107 16.5 17.3 95
Bear Trap Meadow 8200 7.9 4.7 168 9.6 8.8 109
Bone Springs Div 9350 16.8 17.0 99 14.8 15.8 94
Grave Springs 8550 9.7 9.5 102 10.2 11.0 93
Kirwin 9550 -M 9.7 * 11.2 11.7 96
Marquette 8760 7.3 -M * 9.1 -M *
Middle Powder 7760 12.0 12.3 98 11.8 12.0 98
Owl Creek 8975 5.8 5.7 102 7.2 6.2 116
Powder River Pass 9480 12.0 10.3 117 12.6 12.9 98
Shell Creek 9580 15.0 15.5 97 14.2 14.0 101
Timber Creek 7950 5.5 5.1 108 7.1 7.6 93
----- -----
Basin Index (%) 106 98
SHOSHONE RIVER
Blackwater 9780 24.0 23.1 104 24.3 20.8 117
Evening Star 9200 28.5 24.1 118 30.9 27.6 112
Marquette 8760 7.3 -M * 9.1 -M *
Sylvan Lake 8420 22.7 19.7 115 24.7 22.5 110
Sylvan Road 7120 11.4 10.4 110 -M 16.8 *
Younts Peak 8350 18.1 14.5 125 15.0 15.9 94
----- -----
Basin Index (%) 114 109
POWDER RIVER
Bear Trap Meadow 8200 7.9 4.7 168 9.6 8.8 109
Cloud Peak Reservoir 9860 14.2 15.2 93 13.8 13.7 101
Grave Springs 8550 9.7 9.5 102 10.2 11.0 93
Hansen Sawmill 8360 7.1 6.1 116 8.9 8.8 101
Middle Powder 7760 12.0 12.3 98 11.8 12.0 98
Powder River Pass 9480 12.0 10.3 117 12.6 12.9 98
Soldier Park 8720 6.7 -M * 9.0 -M *
----- -----
Basin Index (%) 108 100
TONGUE RIVER
Big Goose 7990 8.8 9.9 89 9.7 11.9 82
Bone Springs Div 9350 16.8 17.0 99 14.8 15.8 94
Burgess Junction 7880 11.3 12.2 93 12.6 12.7 99
Dome Lake 8880 13.2 11.9 111 9.8 14.0 70
Little Goose 8870 10.6 -M * 8.4 -M *
Sucker Creek 8880 12.9 12.5 103 13.0 14.8 88
Tie Creek 6870 7.4 5.3 140 12.8 12.1 106
----- -----
Basin Index (%) 102 89
BELLE FOURCHE
Blind Park 6890 3.5 6.4 55 8.3 12.2 68
Cole Canyon 5910 -M 4.3 * -M 9.7 *
----- -----
Basin Index (%) 55 68
CHEYENNE RIVER BASIN
Blind Park 6890 3.5 6.4 55 8.3 12.2 68
North Rapid Creek 6130 5.4 6.2 87 8.4 10.2 82
----- -----
Basin Index (%) 71 75
UPPER N. PLATTE
Arapaho Ridge 10960 23.1 21.3 108 22.1 23.2 95
Blackhall Mtn 9820 30.1 -M * 29.1 -M *
Columbine 9160 27.4 23.0 119 28.3 25.9 109
Divide Peak 8880 20.7 20.3 102 21.9 21.8 100
Joe Wright 10120 21.1 21.8 97 26.6 26.2 102
Laprele Creek 8375 11.7 9.4 124 13.2 12.8 103
Med Bow 10500 42.9 -M * 35.3 -M *
Never Summer 10280 -M 20.5 * -M -M *
North French Creek 10130 33.4 30.7 109 32.0 27.2 118
Old Battle 10000 32.1 31.9 101 30.4 35.5 86
Rawah 9020 9.9 10.4 95 14.4 14.8 97
Sage Creek Basin 7850 12.3 10.8 114 12.5 14.9 84
Sand Lake 10050 29.8 29.8 100 27.2 25.2 108
South Brush Creek 8440 10.2 11.6 88 13.2 15.6 85
Tower 10500 45.7 46.9 97 41.8 40.3 104
Webber Springs 9250 22.3 23.3 96 25.3 27.1 93
Whiskey Park 8950 32.1 27.6 116 31.5 28.3 111
Willow Creek Pass 9540 13.7 12.5 110 12.9 13.7 94
Zirkel 9340 25.8 25.5 101 -M 29.0 *
----- -----
Basin Index (%) 104 100
SWEETWATER
Deer Park 9700 14.0 16.1 87 13.7 20.4 67
Larsen Creek 9000 6.3 11.2 56 9.3 -M *
South Pass 9040 12.0 15.6 77 11.4 17.7 64
----- -----
Basin Index (%) 75 66
LOWER N. PLATTE
Casper Mtn. 7900 15.7 14.5 108 11.9 15.4 77
Laprele Creek 8375 11.7 9.4 124 13.2 12.8 103
Reno Hill 8400 16.5 14.2 116 17.5 15.9 110
Windy Peak 7900 9.2 7.6 121 9.3 10.8 86
----- -----
Basin Index (%) 116 95
LARAMIE RIVER
Brooklyn Lake 10240 27.6 22.3 124 26.4 21.5 123
Cinnabar Park 9574 22.6 21.4 106 25.3 24.6 103
Crow Creek 8330 6.3 6.3 100 10.7 11.3 95
Deadman Hill 10220 18.7 16.5 113 16.5 17.7 93
Rawah 9020 9.9 10.4 95 14.4 14.8 97
Roach 9700 14.2 16.6 86 16.2 19.6 83
Windy Peak 7900 9.2 7.6 121 9.3 10.8 86
----- -----
Basin Index (%) 107 99
S. PLATTE
Black Mountain 8920 9.2 -M * 13.2 -M *
Crow Creek 8330 6.3 6.3 100 10.7 11.3 95
Deadman Hill 10220 18.7 16.5 113 16.5 17.7 93
----- -----
Basin Index (%) 110 94
LITTLE SNAKE RIVER
Battle Mountain 7440 8.6 8.4 102 14.6 15.2 96
Divide Peak 8880 20.7 20.3 102 21.9 21.8 100
Elk River 8700 18.2 18.4 99 18.1 20.4 89
Little Snake River 8915 26.4 26.0 102 32.5 30.5 107
Old Battle 10000 32.1 31.9 101 30.4 35.5 86
Sage Creek Basin 7850 12.3 10.8 114 12.5 14.9 84
Sandstone RS 8150 13.5 12.6 107 16.2 18.6 87
Whiskey Park 8950 32.1 27.6 116 31.5 28.3 111
----- -----
Basin Index (%) 105 96
UPPER GREEN RIVER
Big Sandy Opening 9080 9.9 12.9 77 9.1 13.5 67
Blind Bull Sum 8650 26.5 23.5 113 16.2 19.6 83
East Rim Divide 7930 11.0 10.2 108 10.1 11.8 86
Elkhart Park G.S. 9400 10.6 12.3 86 10.7 13.5 79
Gros Ventre Summit 8750 12.9 12.8 101 12.7 13.1 97
Gunsight Pass 9820 13.2 13.8 96 13.7 14.1 97
Indian Creek 9425 23.6 24.8 95 16.8 22.7 74
Kendall R.S. 7740 10.1 10.9 93 11.3 14.3 79
Loomis Park 8240 14.6 13.7 107 18.6 17.4 107
New Fork Lake 8340 10.1 10.1 100 -M 10.9 *
Pocket Creek 9360 -M -M * 8.5 -M *
Snider Basin 8060 12.5 12.2 102 14.3 14.3 100
Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106
Triple Peak 8500 27.9 21.0 133 26.9 25.5 105
----- -----
Basin Index (%) 105 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.5 -M * 12.0 -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 13.3 -M * 12.0 -M *
Hams Fork 7840 10.6 9.7 109 11.8 11.5 103
Hewinta 9500 10.7 10.6 101 14.7 14.4 102
Hickerson Park 9122 10.2 7.7 132 11.8 10.5 112
Hole-in-Rock 9168 9.8 7.1 138 11.6 10.0 116
Indian Creek 9425 23.6 24.8 95 16.8 22.7 74
Kelley R.S. 8180 15.2 14.3 106 16.7 18.2 92
Spirit Lk 10235 17.2 -M * 18.6 -M *
Steel Creek Park 10158 17.5 16.0 109 18.0 16.9 107
----- -----
Basin Index (%) 108 97
UPPER BEAR RIVER
Bear River RS 8777 8.4 -M * 11.7 -M *
Bug Lake 7987 18.7 19.0 98 18.8 19.6 96
Burts Miller Ranch 8000 3.0 -M * 7.2 -M *
Chalk Creek #1 9171 20.2 24.7 82 19.4 25.6 76
Hayden Fork 9130 14.5 14.9 97 20.6 21.4 96
Kelley R.S. 8180 15.2 14.3 106 16.7 18.2 92
Lily Lake 9133 11.5 12.7 91 13.1 17.5 75
Monte Cristo 8932 28.9 27.9 104 26.6 26.3 101
Salt River Summit 7640 14.7 12.3 120 16.3 16.8 97
Spring Creek Divide 9000 27.1 22.7 119 25.4 23.9 106
----- -----
Basin Index (%) 102 93
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.