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 3 , 2020
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 17.4 15.0 116 18.0 20.4 88
Black Bear 8170 34.8 36.8 95 32.0 37.0 86
Blind Bull Sum 8650 25.9 22.8 114 15.6 19.0 82
Cottonwood Creek 7670 27.2 21.3 128 28.9 24.0 120
East Rim Divide 7930 11.8 10.1 117 9.4 11.4 82
Grand Targhee 9260 41.7 37.2 112 28.4 30.0 95
Granite Creek 6770 17.2 14.8 116 -M 19.2 *
Grassy Lake 7265 33.5 31.6 106 33.3 35.0 95
Gros Ventre Summit 8750 12.3 13.0 95 11.8 12.5 94
Gunsight Pass 9820 13.2 13.5 98 13.0 13.4 97
Lewis Lake Divide 7850 26.6 29.6 90 30.4 34.5 88
Phillips Bench 8200 29.5 24.6 120 28.3 27.4 103
Salt River Summit 7640 15.8 13.0 122 15.8 16.2 98
Snake River Station 6920 18.0 15.2 118 21.1 21.8 97
Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106
Thumb Divide 7980 16.9 14.8 114 16.3 18.0 91
Togwotee Pass 9580 27.2 21.7 125 26.5 23.6 112
Two Ocean Plateau 9240 30.8 25.7 120 24.2 26.4 92
Willow Creek 8080 37.7 28.1 134 35.2 32.7 108
Younts Peak 8350 17.4 14.2 123 13.4 15.3 88
----- -----
Basin Index (%) 113 96
MADISON-GALLATIN
Black Bear 8170 34.8 36.8 95 32.0 37.0 86
Canyon 7870 14.9 12.4 120 15.1 15.7 96
Madison Plateau 7750 22.2 21.4 104 19.6 25.5 77
West Yellowstone 6700 11.8 10.2 116 9.3 13.8 67
Whiskey Creek 6800 15.6 15.0 104 17.5 19.5 90
----- -----
Basin Index (%) 104 84
YELLOWSTONE
Beartooth Lake 9360 23.2 21.2 109 21.5 19.1 113
Burnt Mtn 5880 8.9 4.5 198 13.9 12.4 112
Canyon 7870 14.9 12.4 120 15.1 15.7 96
Cole Creek 7850 17.2 13.9 124 13.4 12.2 110
Evening Star 9200 27.5 23.8 116 29.2 26.4 111
Fisher Creek 9100 32.4 30.6 106 33.0 30.7 107
Northeast Entrance 7350 11.1 9.4 118 12.6 11.8 107
Parker Peak 9400 -M 18.9 * -M 17.0 *
Sylvan Lake 8420 22.0 19.2 115 23.5 21.6 109
Thumb Divide 7980 16.9 14.8 114 16.3 18.0 91
Two Ocean Plateau 9240 30.8 25.7 120 24.2 26.4 92
White Mill 8700 26.2 21.8 120 21.8 22.9 95
Wolverine 7650 12.9 9.3 139 12.9 11.8 109
Younts Peak 8350 17.4 14.2 123 13.4 15.3 88
----- -----
Basin Index (%) 118 103
WIND RIVER
Burroughs Creek 8750 12.9 -M * 13.7 -M *
Castle Creek 8400 6.0 -M * 6.7 -M *
Cold Springs 9630 7.5 7.1 106 6.6 9.7 68
Deer Park 9700 14.0 14.9 94 12.5 19.1 65
Hobbs Park 10100 13.4 13.6 99 11.3 12.8 88
Kirwin 9550 11.6 9.5 122 10.1 11.2 90
Little Warm 9370 12.3 10.2 121 9.2 12.4 74
Owl Creek 8975 6.6 5.7 116 7.0 5.8 121
South Pass 9040 12.1 15.0 81 10.6 16.9 63
St. Lawrence Alt 8620 5.2 6.8 76 7.2 8.7 83
Togwotee Pass 9580 27.2 21.7 125 26.5 23.6 112
Townsend Creek 8700 9.4 9.2 102 9.4 11.5 82
----- -----
Basin Index (%) 105 84
BIGHORN BASIN
Bald Mtn. 9380 20.0 18.9 106 14.8 16.5 90
Bear Trap Meadow 8200 8.7 5.1 171 9.0 8.2 110
Bone Springs Div 9350 17.3 16.3 106 13.9 15.0 93
Grave Springs 8550 9.8 9.0 109 10.3 10.1 102
Kirwin 9550 11.6 9.5 122 10.1 11.2 90
Marquette 8760 7.0 -M * 8.6 -M *
Middle Powder 7760 12.4 11.6 107 11.6 11.3 103
Owl Creek 8975 6.6 5.7 116 7.0 5.8 121
Powder River Pass 9480 12.2 10.0 122 12.0 12.1 99
Shell Creek 9580 14.5 14.7 99 13.7 13.3 103
Timber Creek 7950 6.1 4.8 127 7.0 7.1 99
----- -----
Basin Index (%) 113 99
SHOSHONE RIVER
Blackwater 9780 22.3 22.3 100 22.3 19.9 112
Evening Star 9200 27.5 23.8 116 29.2 26.4 111
Marquette 8760 7.0 -M * 8.6 -M *
Sylvan Lake 8420 22.0 19.2 115 23.5 21.6 109
Sylvan Road 7120 12.6 11.0 115 -M 16.3 *
Younts Peak 8350 17.4 14.2 123 13.4 15.3 88
----- -----
Basin Index (%) 112 106
POWDER RIVER
Bear Trap Meadow 8200 8.7 5.1 171 9.0 8.2 110
Cloud Peak Reservoir 9860 14.0 14.3 98 12.9 12.8 101
Grave Springs 8550 9.8 9.0 109 10.3 10.1 102
Hansen Sawmill 8360 7.4 6.3 117 8.5 8.2 104
Middle Powder 7760 12.4 11.6 107 11.6 11.3 103
Powder River Pass 9480 12.2 10.0 122 12.0 12.1 99
Soldier Park 8720 6.8 -M * 8.5 -M *
----- -----
Basin Index (%) 115 103
TONGUE RIVER
Big Goose 7990 8.6 9.2 93 9.9 10.9 91
Bone Springs Div 9350 17.3 16.3 106 13.9 15.0 93
Burgess Junction 7880 11.3 11.5 98 12.0 11.9 101
Dome Lake 8880 13.2 11.6 114 9.3 13.1 71
Little Goose 8870 10.6 -M * 8.1 -M *
Sucker Creek 8880 13.2 11.6 114 12.3 13.9 88
Tie Creek 6870 8.2 5.5 149 12.5 11.1 113
----- -----
Basin Index (%) 109 92
BELLE FOURCHE
Blind Park 6890 6.1 7.2 85 8.0 11.4 70
Cole Canyon 5910 -M 5.7 * -M 9.0 *
----- -----
Basin Index (%) 85 70
CHEYENNE RIVER BASIN
Blind Park 6890 6.1 7.2 85 8.0 11.4 70
North Rapid Creek 6130 7.3 6.7 109 8.4 9.4 89
----- -----
Basin Index (%) 96 79
UPPER N. PLATTE
Arapaho Ridge 10960 23.0 20.2 114 21.9 21.5 102
Blackhall Mtn 9820 30.7 -M * 29.1 -M *
Columbine 9160 30.1 23.2 130 27.3 24.8 110
Divide Peak 8880 21.3 19.6 109 21.6 20.8 104
Joe Wright 10120 -M 20.5 * -M 25.0 *
Laprele Creek 8375 12.8 9.4 136 12.9 12.1 107
Med Bow 10500 43.8 -M * 35.0 -M *
Never Summer 10280 20.2 19.9 102 15.2 -M *
North French Creek 10130 33.4 28.5 117 32.0 26.0 123
Old Battle 10000 32.2 30.3 106 29.1 34.1 85
Rawah 9020 11.9 10.4 114 14.3 13.7 104
Sage Creek Basin 7850 15.3 12.6 121 12.4 14.1 88
Sand Lake 10050 29.8 28.1 106 26.9 24.0 112
South Brush Creek 8440 12.8 12.2 105 13.0 14.8 88
Tower 10500 46.0 44.8 103 40.7 38.6 105
Webber Springs 9250 23.1 23.0 100 25.0 26.0 96
Whiskey Park 8950 32.8 26.5 124 31.4 27.2 115
Willow Creek Pass 9540 13.6 11.9 114 12.8 13.0 98
Zirkel 9340 28.8 26.3 110 30.7 27.6 111
----- -----
Basin Index (%) 112 104
SWEETWATER
Deer Park 9700 14.0 14.9 94 12.5 19.1 65
Larsen Creek 9000 6.8 12.0 57 8.7 -M *
South Pass 9040 12.1 15.0 81 10.6 16.9 63
----- -----
Basin Index (%) 79 64
LOWER N. PLATTE
Casper Mtn. 7900 16.7 13.8 121 11.8 14.3 83
Laprele Creek 8375 12.8 9.4 136 12.9 12.1 107
Reno Hill 8400 17.0 13.6 125 16.8 14.8 114
Windy Peak 7900 10.0 7.8 128 8.5 10.2 83
----- -----
Basin Index (%) 127 97
LARAMIE RIVER
Brooklyn Lake 10240 27.6 20.7 133 26.2 20.4 128
Cinnabar Park 9574 22.9 20.4 112 25.4 23.3 109
Crow Creek 8330 7.5 7.0 107 10.5 10.4 101
Deadman Hill 10220 18.6 15.8 118 16.4 16.7 98
Rawah 9020 11.9 10.4 114 14.3 13.7 104
Roach 9700 15.3 16.0 96 15.7 18.6 84
Windy Peak 7900 10.0 7.8 128 8.5 10.2 83
----- -----
Basin Index (%) 116 103
S. PLATTE
Black Mountain 8920 10.1 -M * 13.0 -M *
Crow Creek 8330 7.5 7.0 107 10.5 10.4 101
Deadman Hill 10220 18.6 15.8 118 16.4 16.7 98
----- -----
Basin Index (%) 114 99
LITTLE SNAKE RIVER
Battle Mountain 7440 12.0 10.4 115 13.9 14.6 95
Divide Peak 8880 21.3 19.6 109 21.6 20.8 104
Elk River 8700 20.5 18.9 108 17.8 19.5 91
Little Snake River 8915 28.3 23.8 119 32.6 28.9 113
Old Battle 10000 32.2 30.3 106 29.1 34.1 85
Sage Creek Basin 7850 15.3 12.6 121 12.4 14.1 88
Sandstone RS 8150 17.1 13.0 132 16.0 17.9 89
Whiskey Park 8950 32.8 26.5 124 31.4 27.2 115
----- -----
Basin Index (%) 116 99
UPPER GREEN RIVER
Big Sandy Opening 9080 9.9 12.4 80 8.6 12.8 67
Blind Bull Sum 8650 25.9 22.8 114 15.6 19.0 82
East Rim Divide 7930 11.8 10.1 117 9.4 11.4 82
Elkhart Park G.S. 9400 10.3 12.2 84 10.1 12.9 78
Gros Ventre Summit 8750 12.3 13.0 95 11.8 12.5 94
Gunsight Pass 9820 13.2 13.5 98 13.0 13.4 97
Indian Creek 9425 23.4 24.2 97 16.4 22.0 75
Kendall R.S. 7740 10.9 11.5 95 10.7 13.8 78
Loomis Park 8240 14.8 14.1 105 17.8 16.8 106
New Fork Lake 8340 10.8 10.3 105 -M 10.5 *
Pocket Creek 9360 -M -M * 8.3 -M *
Snider Basin 8060 13.0 12.3 106 13.7 13.9 99
Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106
Triple Peak 8500 27.0 21.9 123 26.2 24.7 106
----- -----
Basin Index (%) 104 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.4 -M * 12.1 -M *
Buck Pasture 9632 18.2 -M * 17.2 -M *
EF Blacks Fork GS 9360 14.5 -M * 11.5 -M *
Hams Fork 7840 12.6 10.9 116 11.5 11.1 104
Hewinta 9500 12.0 10.9 110 14.4 13.6 106
Hickerson Park 9122 10.9 7.7 142 11.8 9.9 119
Hole-in-Rock 9168 11.7 7.0 167 11.2 9.4 119
Indian Creek 9425 23.4 24.2 97 16.4 22.0 75
Kelley R.S. 8180 15.6 15.0 104 16.3 17.6 93
Spirit Lk 10235 17.9 -M * 18.2 -M *
Steel Creek Park 10158 17.5 15.5 113 18.0 16.0 112
----- -----
Basin Index (%) 114 100
UPPER BEAR RIVER
Bear River RS 8777 10.4 -M * 11.6 -M *
Bug Lake 7987 19.8 18.2 109 18.6 18.9 98
Burts Miller Ranch 8000 6.3 -M * 7.1 -M *
Chalk Creek #1 9171 20.9 23.8 88 19.2 24.5 78
Hayden Fork 9130 17.5 15.3 114 20.3 20.5 99
Kelley R.S. 8180 15.6 15.0 104 16.3 17.6 93
Lily Lake 9133 12.6 12.3 102 13.1 16.6 79
Monte Cristo 8932 29.9 26.9 111 26.3 25.3 104
Salt River Summit 7640 15.8 13.0 122 15.8 16.2 98
Spring Creek Divide 9000 26.5 22.5 118 24.6 23.2 106
----- -----
Basin Index (%) 108 95
-----------------------------------------------------------------------------
-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.