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: MARCH 27 , 2020
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 16.3 14.7 111 16.6 19.7 84
Black Bear 8170 31.5 34.6 91 29.4 35.6 83
Blind Bull Sum 8650 23.8 21.3 112 14.4 18.3 79
Cottonwood Creek 7670 25.3 20.6 123 27.3 23.0 119
East Rim Divide 7930 11.5 9.8 117 8.9 11.0 81
Grand Targhee 9260 38.7 34.6 112 27.2 28.3 96
Granite Creek 6770 16.3 14.8 110 -M 18.7 *
Grassy Lake 7265 30.7 30.8 100 30.4 33.9 90
Gros Ventre Summit 8750 11.6 12.2 95 11.1 11.9 93
Gunsight Pass 9820 12.4 12.9 96 12.2 12.7 96
Lewis Lake Divide 7850 24.0 29.0 83 28.0 33.2 84
Phillips Bench 8200 -M 23.4 * -M 26.4 *
Salt River Summit 7640 14.6 12.5 117 14.8 15.6 95
Snake River Station 6920 16.5 15.8 104 19.4 21.1 92
Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104
Thumb Divide 7980 15.2 15.1 101 14.7 17.2 85
Togwotee Pass 9580 25.8 21.3 121 24.9 22.6 110
Two Ocean Plateau 9240 28.1 25.0 112 22.6 25.4 89
Willow Creek 8080 34.6 26.2 132 32.7 31.2 105
Younts Peak 8350 16.4 13.8 119 12.6 14.7 86
----- -----
Basin Index (%) 108 93
MADISON-GALLATIN
Black Bear 8170 31.5 34.6 91 29.4 35.6 83
Canyon 7870 13.9 12.1 115 14.1 15.0 94
Madison Plateau 7750 20.1 20.8 97 17.7 24.5 72
West Yellowstone 6700 11.2 10.1 111 8.7 13.1 66
Whiskey Creek 6800 14.4 14.6 99 16.2 18.8 86
----- -----
Basin Index (%) 99 80
YELLOWSTONE
Beartooth Lake 9360 21.7 20.4 106 20.1 18.4 109
Burnt Mtn 5880 7.7 4.7 164 12.7 11.4 111
Canyon 7870 13.9 12.1 115 14.1 15.0 94
Cole Creek 7850 16.1 12.8 126 12.6 11.4 111
Evening Star 9200 25.5 23.5 109 27.7 25.4 109
Fisher Creek 9100 30.3 28.9 105 30.9 29.6 104
Northeast Entrance 7350 10.6 9.7 109 11.8 11.4 104
Parker Peak 9400 23.8 18.3 130 21.7 16.3 133
Sylvan Lake 8420 20.0 18.8 106 21.5 20.7 104
Thumb Divide 7980 15.2 15.1 101 14.7 17.2 85
Two Ocean Plateau 9240 28.1 25.0 112 22.6 25.4 89
White Mill 8700 24.6 21.1 117 20.5 22.0 93
Wolverine 7650 11.9 8.9 134 11.9 11.3 105
Younts Peak 8350 16.4 13.8 119 12.6 14.7 86
----- -----
Basin Index (%) 114 102
WIND RIVER
Burroughs Creek 8750 11.8 -M * 12.6 -M *
Castle Creek 8400 5.2 -M * 5.6 -M *
Cold Springs 9630 7.1 6.9 103 6.1 9.0 68
Deer Park 9700 12.6 14.2 89 11.1 17.9 62
Hobbs Park 10100 12.2 12.8 95 10.3 11.8 87
Kirwin 9550 10.3 8.9 116 9.0 10.5 86
Little Warm 9370 11.0 9.9 111 8.2 11.8 69
Owl Creek 8975 6.1 4.8 127 6.1 5.4 113
South Pass 9040 11.2 14.4 78 9.6 16.0 60
St. Lawrence Alt 8620 4.8 6.6 73 6.5 8.0 81
Togwotee Pass 9580 25.8 21.3 121 24.9 22.6 110
Townsend Creek 8700 8.5 8.7 98 8.4 10.6 79
----- -----
Basin Index (%) 101 81
BIGHORN BASIN
Bald Mtn. 9380 19.7 17.3 114 14.9 15.5 96
Bear Trap Meadow 8200 8.7 5.1 171 8.7 7.6 114
Bone Springs Div 9350 16.6 14.7 113 13.4 14.1 95
Grave Springs 8550 9.5 8.4 113 9.9 9.4 105
Kirwin 9550 10.3 8.9 116 9.0 10.5 86
Marquette 8760 6.4 -M * 8.0 -M *
Middle Powder 7760 11.9 10.6 112 11.3 10.6 107
Owl Creek 8975 6.1 4.8 127 6.1 5.4 113
Powder River Pass 9480 11.9 9.6 124 11.9 11.4 104
Shell Creek 9580 14.1 13.7 103 13.3 12.5 106
Timber Creek 7950 4.9 4.3 114 6.3 6.5 97
----- -----
Basin Index (%) 117 101
SHOSHONE RIVER
Blackwater 9780 20.6 21.4 96 21.0 18.9 111
Evening Star 9200 25.5 23.5 109 27.7 25.4 109
Marquette 8760 6.4 -M * 8.0 -M *
Sylvan Lake 8420 20.0 18.8 106 21.5 20.7 104
Sylvan Road 7120 11.9 10.9 109 -M 15.7 *
Younts Peak 8350 16.4 13.8 119 12.6 14.7 86
----- -----
Basin Index (%) 107 104
POWDER RIVER
Bear Trap Meadow 8200 8.7 5.1 171 8.7 7.6 114
Cloud Peak Reservoir 9860 13.5 13.5 100 12.4 11.9 104
Grave Springs 8550 9.5 8.4 113 9.9 9.4 105
Hansen Sawmill 8360 6.8 6.1 111 7.9 7.7 103
Middle Powder 7760 11.9 10.6 112 11.3 10.6 107
Powder River Pass 9480 11.9 9.6 124 11.9 11.4 104
Soldier Park 8720 6.3 -M * 7.9 -M *
----- -----
Basin Index (%) 117 106
TONGUE RIVER
Big Goose 7990 8.4 8.3 101 9.4 9.8 96
Bone Springs Div 9350 16.6 14.7 113 13.4 14.1 95
Burgess Junction 7880 10.8 10.5 103 11.6 11.1 105
Dome Lake 8880 12.9 11.0 117 8.8 12.2 72
Little Goose 8870 10.3 -M * 7.8 -M *
Sucker Creek 8880 12.9 11.1 116 11.8 12.9 91
Tie Creek 6870 8.1 5.3 153 12.1 10.2 119
----- -----
Basin Index (%) 114 95
BELLE FOURCHE
Blind Park 6890 6.6 7.1 93 7.9 10.8 73
Cole Canyon 5910 -M 5.7 * -M 8.3 *
----- -----
Basin Index (%) 93 73
CHEYENNE RIVER BASIN
Blind Park 6890 6.6 7.1 93 7.9 10.8 73
North Rapid Creek 6130 7.4 6.7 110 7.9 8.9 89
----- -----
Basin Index (%) 101 80
UPPER N. PLATTE
Arapaho Ridge 10960 22.5 18.9 119 21.4 20.5 104
Blackhall Mtn 9820 29.4 -M * 28.1 -M *
Columbine 9160 31.2 22.0 142 27.9 23.8 117
Divide Peak 8880 20.5 18.8 109 20.8 19.8 105
Joe Wright 10120 -M 19.7 * -M 23.8 *
Laprele Creek 8375 12.2 9.4 130 12.1 11.4 106
Med Bow 10500 42.6 -M * 33.9 -M *
Never Summer 10280 19.5 18.7 104 14.5 -M *
North French Creek 10130 32.8 27.0 121 31.3 24.8 126
Old Battle 10000 30.8 28.1 110 27.7 32.5 85
Rawah 9020 12.2 10.0 122 13.9 12.9 108
Sage Creek Basin 7850 15.5 12.2 127 11.7 13.4 87
Sand Lake 10050 28.7 26.1 110 26.2 22.7 115
South Brush Creek 8440 13.6 11.8 115 12.7 14.0 91
Tower 10500 45.3 41.9 108 40.3 37.1 109
Webber Springs 9250 22.1 22.3 99 23.9 24.8 96
Whiskey Park 8950 32.1 24.8 129 30.4 26.0 117
Willow Creek Pass 9540 13.0 11.4 114 12.3 12.2 101
Zirkel 9340 28.6 25.9 110 30.2 26.5 114
----- -----
Basin Index (%) 116 106
SWEETWATER
Deer Park 9700 12.6 14.2 89 11.1 17.9 62
Larsen Creek 9000 -M 11.8 * -M -M *
South Pass 9040 11.2 14.4 78 9.6 16.0 60
----- -----
Basin Index (%) 83 61
LOWER N. PLATTE
Casper Mtn. 7900 15.4 12.8 120 10.6 13.4 79
Laprele Creek 8375 12.2 9.4 130 12.1 11.4 106
Reno Hill 8400 16.3 12.6 129 16.3 13.8 118
Windy Peak 7900 9.7 7.7 126 8.5 9.6 89
----- -----
Basin Index (%) 126 99
LARAMIE RIVER
Brooklyn Lake 10240 27.0 18.7 144 25.4 19.3 132
Cinnabar Park 9574 22.7 19.5 116 24.7 22.4 110
Crow Creek 8330 7.5 6.9 109 10.2 9.7 105
Deadman Hill 10220 17.8 14.8 120 15.7 15.8 99
Rawah 9020 12.2 10.0 122 13.9 12.9 108
Roach 9700 15.2 14.7 103 15.5 17.6 88
Windy Peak 7900 9.7 7.7 126 8.5 9.6 89
----- -----
Basin Index (%) 121 106
S. PLATTE
Black Mountain 8920 10.3 -M * 12.4 -M *
Crow Creek 8330 7.5 6.9 109 10.2 9.7 105
Deadman Hill 10220 17.8 14.8 120 15.7 15.8 99
----- -----
Basin Index (%) 117 102
LITTLE SNAKE RIVER
Battle Mountain 7440 12.3 11.0 112 13.3 14.0 95
Divide Peak 8880 20.5 18.8 109 20.8 19.8 105
Elk River 8700 20.1 17.8 113 17.2 18.6 92
Little Snake River 8915 27.3 21.9 125 31.5 27.5 115
Old Battle 10000 30.8 28.1 110 27.7 32.5 85
Sage Creek Basin 7850 15.5 12.2 127 11.7 13.4 87
Sandstone RS 8150 16.8 13.0 129 15.2 17.2 88
Whiskey Park 8950 32.1 24.8 129 30.4 26.0 117
----- -----
Basin Index (%) 119 99
UPPER GREEN RIVER
Big Sandy Opening 9080 9.1 12.0 76 7.8 12.3 63
Blind Bull Sum 8650 23.8 21.3 112 14.4 18.3 79
East Rim Divide 7930 11.5 9.8 117 8.9 11.0 81
Elkhart Park G.S. 9400 9.9 11.5 86 9.7 12.3 79
Gros Ventre Summit 8750 11.6 12.2 95 11.1 11.9 93
Gunsight Pass 9820 12.4 12.9 96 12.2 12.7 96
Indian Creek 9425 22.0 22.7 97 15.5 21.0 74
Kendall R.S. 7740 10.2 11.3 90 10.1 13.5 75
Loomis Park 8240 13.9 14.3 97 16.6 16.2 102
New Fork Lake 8340 10.3 9.9 104 -M 10.1 *
Pocket Creek 9360 -M -M * 7.5 -M *
Snider Basin 8060 12.8 11.5 111 13.2 13.2 100
Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104
Triple Peak 8500 25.2 20.7 122 24.9 23.7 105
----- -----
Basin Index (%) 103 89
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.3 -M * 11.7 -M *
Buck Pasture 9632 17.7 -M * 16.7 -M *
EF Blacks Fork GS 9360 14.3 -M * 11.6 -M *
Hams Fork 7840 12.3 10.6 116 10.9 10.6 103
Hewinta 9500 11.1 10.0 111 14.3 12.9 111
Hickerson Park 9122 10.8 7.0 154 11.5 9.3 124
Hole-in-Rock 9168 11.5 6.9 167 11.1 8.7 128
Indian Creek 9425 22.0 22.7 97 15.5 21.0 74
Kelley R.S. 8180 15.0 14.4 104 15.5 17.0 91
Spirit Lk 10235 17.6 -M * 18.0 -M *
Steel Creek Park 10158 17.0 14.2 120 17.6 15.0 117
----- -----
Basin Index (%) 116 102
UPPER BEAR RIVER
Bear River RS 8777 9.9 -M * 10.9 -M *
Bug Lake 7987 18.9 17.6 107 17.8 18.1 98
Burts Miller Ranch 8000 6.0 -M * 6.8 -M *
Chalk Creek #1 9171 20.1 22.4 90 18.3 23.2 79
Hayden Fork 9130 16.9 14.6 116 19.9 19.4 103
Kelley R.S. 8180 15.0 14.4 104 15.5 17.0 91
Lily Lake 9133 12.1 11.8 103 12.6 15.7 80
Monte Cristo 8932 28.8 25.3 114 23.8 24.2 98
Salt River Summit 7640 14.6 12.5 117 14.8 15.6 95
Spring Creek Divide 9000 24.7 22.2 111 23.1 22.3 104
----- -----
Basin Index (%) 107 94
-----------------------------------------------------------------------------
-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.