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 SUNDAY: MAY 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 11.4 8.4 136 21.2 22.9 93
Black Bear 8170 -M 37.3 * 35.2 42.0 84
Blind Bull Sum 8650 28.1 22.9 123 18.1 21.5 84
Cottonwood Creek 7670 21.5 14.7 146 32.9 27.7 119
East Rim Divide 7930 2.3 7.9 29 11.8 13.0 91
Grand Targhee 9260 40.9 45.5 90 34.5 34.9 99
Granite Creek 6770 13.3 7.8 171 -M 21.5 *
Grassy Lake 7265 27.6 28.3 98 36.7 39.5 93
Gros Ventre Summit 8750 12.9 11.3 114 15.2 14.7 103
Gunsight Pass 9820 14.0 12.1 116 16.0 16.2 99
Lewis Lake Divide 7850 24.0 29.7 81 34.3 38.8 88
Phillips Bench 8200 28.3 24.8 114 33.3 30.9 108
Salt River Summit 7640 7.5 7.6 99 17.6 18.5 95
Snake River Station 6920 10.4 6.2 168 23.6 24.9 95
Spring Creek Divide 9000 26.3 24.3 108 27.3 26.4 103
Thumb Divide 7980 11.9 11.3 105 18.7 21.1 89
Togwotee Pass 9580 28.4 24.7 115 30.4 27.5 111
Two Ocean Plateau 9240 32.4 29.9 108 29.0 30.3 96
Willow Creek 8080 33.2 22.3 149 40.8 37.9 108
Younts Peak 8350 12.5 15.7 80 16.8 17.8 94
----- -----
Basin Index (%) 109 97
MADISON-GALLATIN
Black Bear 8170 -M 37.3 * 35.2 42.0 84
Canyon 7870 12.1 9.6 126 17.3 18.1 96
Madison Plateau 7750 18.7 21.0 89 22.0 29.1 76
West Yellowstone 6700 .1 .6 17* 10.3 16.0 64
Whiskey Creek 6800 12.3 13.8 89 19.6 22.5 87
----- -----
Basin Index (%) 96 82
YELLOWSTONE
Beartooth Lake 9360 25.0 22.7 110 24.6 22.1 111
Burnt Mtn 5880 .5 .0 * 16.0 16.1 99
Canyon 7870 12.1 9.6 126 17.3 18.1 96
Cole Creek 7850 18.1 16.7 108 16.0 16.6 96
Evening Star 9200 25.5 24.8 103 33.7 30.6 110
Fisher Creek 9100 34.1 32.6 105 37.4 35.4 106
Northeast Entrance 7350 3.3 2.0 165 14.7 13.9 106
Parker Peak 9400 -M 21.2 * -M 20.2 *
Sylvan Lake 8420 18.4 19.3 95 27.0 25.3 107
Thumb Divide 7980 11.9 11.3 105 18.7 21.1 89
Two Ocean Plateau 9240 32.4 29.9 108 29.0 30.3 96
White Mill 8700 29.9 23.9 125 24.9 26.5 94
Wolverine 7650 4.6 1.4 329 14.8 13.9 106
Younts Peak 8350 12.5 15.7 80 16.8 17.8 94
----- -----
Basin Index (%) 109 101
WIND RIVER
Burroughs Creek 8750 8.7 -M * 15.5 -M *
Castle Creek 8400 .0 -M * 8.3 -M *
Cold Springs 9630 1.6 1.3 123 9.3 12.6 74
Deer Park 9700 11.2 15.7 71 16.2 23.6 69
Hobbs Park 10100 13.2 16.0 82 14.6 16.9 86
Kirwin 9550 10.8 10.6 102 12.5 14.0 89
Little Warm 9370 10.6 8.4 126 12.0 15.5 77
Owl Creek 8975 .1 .7 14 8.7 8.1 107
South Pass 9040 9.7 14.4 67 13.5 20.5 66
St. Lawrence Alt 8620 .0 2.1 0 9.3 11.7 79
Togwotee Pass 9580 28.4 24.7 115 30.4 27.5 111
Townsend Creek 8700 7.9 6.9 114 12.6 15.1 83
----- -----
Basin Index (%) 93 84
BIGHORN BASIN
Bald Mtn. 9380 21.7 20.5 106 18.4 19.9 92
Bear Trap Meadow 8200 .7 .6 117 10.7 10.8 99
Bone Springs Div 9350 18.9 16.4 115 16.6 18.4 90
Grave Springs 8550 6.9 9.4 73 11.0 13.0 85
Kirwin 9550 10.8 10.6 102 12.5 14.0 89
Marquette 8760 6.3 -M * 11.0 -M *
Middle Powder 7760 9.7 11.4 85 12.9 14.3 90
Owl Creek 8975 .1 .7 14 8.7 8.1 107
Powder River Pass 9480 10.3 9.1 113 15.0 15.2 99
Shell Creek 9580 16.2 16.0 101 15.6 16.5 95
Timber Creek 7950 .4 2.7 15 8.5 10.2 83
----- -----
Basin Index (%) 98 93
SHOSHONE RIVER
Blackwater 9780 25.1 25.7 98 26.8 23.7 113
Evening Star 9200 25.5 24.8 103 33.7 30.6 110
Marquette 8760 6.3 -M * 11.0 -M *
Sylvan Lake 8420 18.4 19.3 95 27.0 25.3 107
Sylvan Road 7120 .1 4.6 2 18.9 18.7 101
Younts Peak 8350 12.5 15.7 80 16.8 17.8 94
----- -----
Basin Index (%) 91 106
POWDER RIVER
Bear Trap Meadow 8200 .7 .6 117 10.7 10.8 99
Cloud Peak Reservoir 9860 13.9 16.4 85 15.7 16.9 93
Grave Springs 8550 6.9 9.4 73 11.0 13.0 85
Hansen Sawmill 8360 3.0 1.8 167 10.7 11.0 97
Middle Powder 7760 9.7 11.4 85 12.9 14.3 90
Powder River Pass 9480 10.3 9.1 113 15.0 15.2 99
Soldier Park 8720 2.3 -M * 10.6 -M *
----- -----
Basin Index (%) 91 94
TONGUE RIVER
Big Goose 7990 7.4 9.3 80 11.3 14.3 79
Bone Springs Div 9350 18.9 16.4 115 16.6 18.4 90
Burgess Junction 7880 11.1 11.8 94 13.6 15.0 91
Dome Lake 8880 12.0 11.3 106 12.0 16.6 72
Little Goose 8870 9.3 -M * -M -M *
Sucker Creek 8880 11.3 12.0 94 15.2 17.6 86
Tie Creek 6870 1.6 2.5 64 14.2 14.6 97
----- -----
Basin Index (%) 98 86
BELLE FOURCHE
Blind Park 6890 -M .2 * 10.0 14.6 68
Cole Canyon 5910 -M .1 * -M 12.3 *
----- -----
Basin Index (%) * 68
CHEYENNE RIVER BASIN
Blind Park 6890 -M .2 * 10.0 14.6 68
North Rapid Creek 6130 .0 .5 0* 9.7 12.6 77
----- -----
Basin Index (%) 0* 72
UPPER N. PLATTE
Arapaho Ridge 10960 22.8 22.3 102 25.5 26.4 97
Blackhall Mtn 9820 29.1 -M * 33.0 -M *
Columbine 9160 21.2 17.5 121 33.3 28.8 116
Divide Peak 8880 13.6 17.8 76 24.2 24.6 98
Joe Wright 10120 23.2 22.9 101 31.1 30.2 103
Laprele Creek 8375 6.1 5.6 109 14.5 15.2 95
Med Bow 10500 42.2 -M * 40.1 -M *
Never Summer 10280 22.1 21.8 101 18.5 -M *
North French Creek 10130 34.5 32.8 105 36.3 31.1 117
Old Battle 10000 33.5 34.7 97 33.3 39.5 84
Rawah 9020 7.0 5.2 135 16.9 17.5 97
Sage Creek Basin 7850 1.8 1.0 180* 13.9 16.3 85
Sand Lake 10050 32.8 31.5 104 31.2 29.3 106
South Brush Creek 8440 4.3 8.4 51 15.0 18.1 83
Tower 10500 46.9 50.4 93 48.0 45.1 106
Webber Springs 9250 18.5 21.3 87 28.8 30.2 95
Whiskey Park 8950 26.0 26.8 97 34.8 31.8 109
Willow Creek Pass 9540 14.3 14.5 99 15.7 16.0 98
Zirkel 9340 19.2 20.8 92 35.2 31.2 113
----- -----
Basin Index (%) 98 101
SWEETWATER
Deer Park 9700 11.2 15.7 71 16.2 23.6 69
Larsen Creek 9000 .0 8.6 0 10.9 -M *
South Pass 9040 9.7 14.4 67 13.5 20.5 66
----- -----
Basin Index (%) 54 67
LOWER N. PLATTE
Casper Mtn. 7900 12.0 12.8 94 13.6 18.3 74
Laprele Creek 8375 6.1 5.6 109 14.5 15.2 95
Reno Hill 8400 15.2 12.2 125 19.9 19.2 104
Windy Peak 7900 3.2 3.4 94 11.2 13.2 85
----- -----
Basin Index (%) 107 90
LARAMIE RIVER
Brooklyn Lake 10240 27.4 23.1 119 31.0 25.0 124
Cinnabar Park 9574 20.8 19.0 109 29.5 27.3 108
Crow Creek 8330 .0 .0 * 14.0 13.6 103
Deadman Hill 10220 18.9 19.2 98 19.8 20.9 95
Rawah 9020 7.0 5.2 135 16.9 17.5 97
Roach 9700 12.4 17.1 73 19.1 22.5 85
Windy Peak 7900 3.2 3.4 94 11.2 13.2 85
----- -----
Basin Index (%) 103 101
S. PLATTE
Black Mountain 8920 6.7 -M * 16.6 -M *
Crow Creek 8330 .0 .0 * 14.0 13.6 103
Deadman Hill 10220 18.9 19.2 98 19.8 20.9 95
----- -----
Basin Index (%) 98* 98
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 15.6 17.3 90
Divide Peak 8880 13.6 17.8 76 24.2 24.6 98
Elk River 8700 11.0 12.5 88 20.0 23.0 87
Little Snake River 8915 21.5 21.8 99 36.0 33.1 109
Old Battle 10000 33.5 34.7 97 33.3 39.5 84
Sage Creek Basin 7850 1.8 1.0 180* 13.9 16.3 85
Sandstone RS 8150 5.9 5.1 116 17.7 21.0 84
Whiskey Park 8950 26.0 26.8 97 34.8 31.8 109
----- -----
Basin Index (%) 95 95
UPPER GREEN RIVER
Big Sandy Opening 9080 7.1 9.8 72 10.3 15.3 67
Blind Bull Sum 8650 28.1 22.9 123 18.1 21.5 84
East Rim Divide 7930 2.3 7.9 29 11.8 13.0 91
Elkhart Park G.S. 9400 8.4 10.8 78 11.9 15.2 78
Gros Ventre Summit 8750 12.9 11.3 114 15.2 14.7 103
Gunsight Pass 9820 14.0 12.1 116 16.0 16.2 99
Indian Creek 9425 19.6 22.5 87 18.2 25.2 72
Kendall R.S. 7740 5.1 3.2 159 13.8 15.6 88
Loomis Park 8240 11.0 10.5 105 21.4 19.1 112
New Fork Lake 8340 4.9 6.0 82 -M 12.3 *
Pocket Creek 9360 -M -M * 9.7 -M *
Snider Basin 8060 3.2 8.9 36 15.3 15.7 97
Spring Creek Divide 9000 26.3 24.3 108 27.3 26.4 103
Triple Peak 8500 22.3 16.7 134 30.3 28.1 108
----- -----
Basin Index (%) 99 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.5 -M * 13.6 -M *
Buck Pasture 9632 12.1 -M * 19.5 -M *
EF Blacks Fork GS 9360 7.7 -M * 13.8 -M *
Hams Fork 7840 .3 2.0 15 13.2 13.2 100
Hewinta 9500 4.4 4.4 100 16.4 16.4 100
Hickerson Park 9122 2.4 3.5 69 12.4 12.2 102
Hole-in-Rock 9168 2.2 2.0 110 12.7 11.6 109
Indian Creek 9425 19.6 22.5 87 18.2 25.2 72
Kelley R.S. 8180 9.0 10.8 83 17.8 20.3 88
Spirit Lk 10235 13.4 -M * 19.4 -M *
Steel Creek Park 10158 15.8 17.4 91 20.1 19.3 104
----- -----
Basin Index (%) 86 94
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 12.7 -M *
Bug Lake 7987 12.0 14.2 85 19.9 21.8 91
Burts Miller Ranch 8000 .0 -M * 7.8 -M *
Chalk Creek #1 9171 15.0 23.8 63 21.1 28.7 74
Hayden Fork 9130 6.3 8.8 72 22.5 24.0 94
Kelley R.S. 8180 9.0 10.8 83 17.8 20.3 88
Lily Lake 9133 6.1 9.9 62 14.2 19.8 72
Monte Cristo 8932 22.1 25.8 86 28.0 29.5 95
Salt River Summit 7640 7.5 7.6 99 17.6 18.5 95
Spring Creek Divide 9000 26.3 24.3 108 27.3 26.4 103
----- -----
Basin Index (%) 83 89
-----------------------------------------------------------------------------
-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.