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: MAY 20 , 2022
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 .1 .0 * 20.9 24.6 85
Blind Bull Sum 8650 26.1 21.2 123 17.3 21.0 82
Cottonwood Creek 7670 9.2 7.9 116 29.8 30.0 99
East Rim Divide 7930 .0 .0 * 12.8 14.0 91
Grand Targhee 9260 31.2 43.4 72 32.7 38.4 85
Granite Creek 6770 .0 .0 * 17.3 22.6 77
Grassy Lake 7265 16.2 15.5 105 36.4 41.4 88
Gros Ventre Summit 8750 3.0 5.4 56 13.5 15.6 87
Gunsight Pass 9820 11.2 10.0 112 17.1 17.4 98
Lewis Lake Divide 7850 16.6 21.9 76 37.0 39.3 94
Loomis Park 8240 .9 1.6 56 18.4 20.6 89
Phillips Bench 8200 16.3 19.4 84 28.2 31.2 90
Salt River Summit 7640 .0 .0 * 18.7 19.0 98
Snake River Station 6920 .1 .0 * 21.3 26.8 79
Somsen Ranch 6800 .0 .0 * -M 19.8 *
Spring Creek Divide 9000 19.5 20.8 94 27.1 28.0 97
Thumb Divide 7980 7.1 .4 1775* 22.3 22.4 100
Togwotee Pass 9580 21.8 22.8 96 26.8 29.2 92
Triple Peak 8500 13.8 10.4 133 31.1 30.6 102
Two Ocean Plateau 9240 30.6 29.4 104 31.2 31.2 100
Willow Creek 8080 18.1 17.5 103 38.7 40.2 96
Younts Peak 8350 2.9 8.2 35 15.0 18.8 80
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Basin Index (%) 96 91
MADISON HEADWATERS IN WYOMING
Black Bear 8170 29.4 34.9 84 35.8 43.0 83
Canyon 7870 6.3 -M * 16.3 -M *
Madison Plateau 7750 14.4 14.4 100 25.8 30.6 84
West Yellowstone 6700 .0 .0 * 16.3 17.0 96
Whiskey Creek 6800 7.0 5.1 137 -M 24.6 *
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Basin Index (%) 93 86
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.8 22.9 91 21.6 25.4 85
Canyon 7870 6.3 -M * 16.3 -M *
Evening Star 9200 29.0 22.8 127 31.0 34.0 91
Fisher Creek 9100 33.4 35.6 94 38.6 40.9 94
Monument Peak 8850 19.2 18.0 107 27.4 27.4 100
Northeast Entrance 7350 .0 .0 * 15.4 16.2 95
Parker Peak 9400 23.5 18.8 125 26.1 24.4 107
Sylvan Lake 8420 13.2 12.9 102 27.1 28.0 97
Thumb Divide 7980 7.1 .4 1775* 22.3 22.4 100
Two Ocean Plateau 9240 30.6 29.4 104 31.2 31.2 100
White Mill 8700 23.1 23.0 100 25.7 27.6 93
Wolverine 7650 .0 .0 * 16.7 15.5 108
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Basin Index (%) 109 97
WIND RIVER
Burroughs Creek 8750 1.5 -M * 17.0 -M *
Castle Creek 8400 .0 .0 * -M 11.8 *
Cold Springs 9630 .4 .0 * 16.3 13.6 120
Deer Park 9700 10.1 10.2 99 21.5 23.9 90
Hobbs Park 10100 16.3 14.3 114 21.6 19.0 114
Kirwin 9550 10.4 8.8 118 17.9 17.2 104
Little Warm 9370 7.0 2.3 304 17.3 15.7 110
South Pass 9040 5.3 8.0 66 18.2 20.6 88
St. Lawrence Alt 8620 .0 -M * 12.4 -M *
Togwotee Pass 9580 21.8 22.8 96 26.8 29.2 92
Townsend Creek 8700 2.0 .8 250* 17.1 16.1 106
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Basin Index (%) 109 101
BIGHORN BASIN
Bald Mtn. 9380 17.4 18.8 93 19.1 20.4 94
Bear Trap Meadow 8200 .0 .0 * 13.2 12.8 103
Bone Springs Div 9350 15.1 14.2 106 17.2 19.6 88
Grave Springs 8550 3.3 2.3 143 13.8 13.4 103
Kirwin 9550 10.4 8.8 118 17.9 17.2 104
Marquette 8760 .8 3.6 22 13.0 15.4 84
Middle Powder 7760 5.9 4.0 148 14.5 14.2 102
Owl Creek 8975 .1 .0 * 10.4 9.8 106
Powder River Pass 9480 4.5 5.6 80 12.8 17.4 74
Shell Creek 9580 14.8 14.4 103 18.5 17.8 104
Timber Creek 7950 .2 .0 * 12.1 12.5 97
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Basin Index (%) 101 95
SHOSHONE RIVER
Blackwater 9780 26.5 22.9 116 29.2 28.2 104
Evening Star 9200 29.0 22.8 127 31.0 34.0 91
Marquette 8760 .8 3.6 22 13.0 15.4 84
Sylvan Lake 8420 13.2 12.9 102 27.1 28.0 97
Sylvan Road 7120 .1 .0 * -M 19.4 *
Younts Peak 8350 2.9 8.2 35 15.0 18.8 80
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Basin Index (%) 103 93
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 13.2 12.8 103
Cloud Peak Reservoir 9860 12.4 12.8 97 19.9 20.0 100
Grave Springs 8550 3.3 2.3 143 13.8 13.4 103
Hansen Sawmill 8360 .0 .0 * 12.8 13.2 97
Middle Powder 7760 5.9 4.0 148 14.5 14.2 102
Powder River Pass 9480 4.5 5.6 80 12.8 17.4 74
Soldier Park 8720 .0 .1 0* 13.5 13.1 103
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Basin Index (%) 105 97
TONGUE RIVER
Big Goose 7990 3.5 4.1 85 16.1 16.4 98
Bone Springs Div 9350 15.1 14.2 106 17.2 19.6 88
Burgess Junction 7880 9.7 6.6 147 18.4 16.7 110
Dome Lake 8880 9.2 6.2 148 18.9 19.7 96
Little Goose 8870 6.6 6.3 105 19.6 17.7 111
Sucker Creek 8880 9.6 7.6 126 22.3 20.8 107
Tie Creek 6870 .2 .0 * 17.6 17.0 104
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Basin Index (%) 120 102
BELLE FOURCHE
Blind Park 6890 .0 .0 * -M 15.1 *
Cole Canyon 5910 .0 .0 * -M 14.0 *
North Rapid Creek 6130 .2 .0 * -M 13.2 *
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Basin Index (%) * *
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * -M 15.1 *
North Rapid Creek 6130 .2 .0 * -M 13.2 *
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Basin Index (%) * *
UPPER N. PLATTE
Arapaho Ridge 10976 11.0 19.6 56 25.0 28.4 88
Blackhall Mtn 9839 18.1 28.7 63 35.3 39.4 90
Cinnabar Park 9707 4.1 12.6 33 24.3 28.8 84
Columbine 9167 .0 1.2 0* 29.5 31.1 95
Divide Peak 8730 .0 5.2 0 24.0 25.8 93
Joe Wright 10158 16.5 19.2 86 36.0 33.6 107
Laprele Creek 8390 .1 .0 * 15.1 16.8 90
Med Bow 10512 30.4 -M * 36.5 -M *
Never Summer 10323 18.9 20.0 94 22.2 22.2 100
North French Creek 10153 20.6 29.2 71 32.1 35.8 90
Old Battle 9860 26.0 32.6 80 36.3 42.0 86
Rawah 9069 .0 .4 0* 20.3 20.2 100
Sage Creek Basin 7850 .1 .0 * 13.2 16.7 79
Sand Lake 10098 25.2 27.6 91 32.1 32.4 99
South Brush Creek 8495 .7 .0 * 16.1 19.0 85
Tower 10620 35.4 43.2 82 47.9 49.4 97
Webber Springs 9260 8.5 11.2 76 29.8 32.2 93
Whiskey Park 9020 -M 22.6 * 34.1 36.0 95
Willow Creek Pass 9523 5.0 10.8 46 18.1 17.7 102
Zirkel 9338 1.5 9.3 16 36.5 35.9 102
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Basin Index (%) 71 94
SWEETWATER
Deer Park 9700 10.1 10.2 99 21.5 23.9 90
Larsen Creek 9000 -M .0 * 15.7 16.8 93
South Pass 9040 5.3 8.0 66 18.2 20.6 88
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Basin Index (%) 85 90
LOWER N. PLATTE
Casper Mtn. 7920 1.4 3.0 47 19.8 18.8 105
Laprele Creek 8390 .1 .0 * 15.1 16.8 90
Reno Hill 8430 6.5 4.8 135 22.7 21.8 104
Windy Peak 7915 .5 .0 * 13.5 14.5 93
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Basin Index (%) 109 99
LARAMIE RIVER
Brooklyn Lake 10250 8.3 16.6 50 27.3 28.0 98
Cinnabar Park 9707 4.1 12.6 33 24.3 28.8 84
Crow Creek 8335 .2 .0 * 12.2 14.4 85
Deadman Hill 10239 8.5 16.2 52 23.6 24.0 98
Rawah 9069 .0 .4 0* 20.3 20.2 100
Roach 9740 3.6 9.3 39 24.6 24.2 102
Windy Peak 7915 .5 .0 * 13.5 14.5 93
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Basin Index (%) 46 95
S. PLATTE
Crow Creek 8335 .2 .0 * 12.2 14.4 85
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Basin Index (%) * 85
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 18.5 19.2 96
Divide Peak 8730 .0 5.2 0 24.0 25.8 93
Elk River 8739 .2 .0 * 25.6 23.7 108
Elkhead Divide 8800 .3 -M * 25.1 -M *
Little Snake River 8928 6.4 12.8 50 36.1 39.6 91
Old Battle 9860 26.0 32.6 80 36.3 42.0 86
Sage Creek Basin 7850 .1 .0 * 13.2 16.7 79
Sandstone RS 8152 .1 .0 * 18.4 21.7 85
Whiskey Park 9020 -M 22.6 * 34.1 36.0 95
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Basin Index (%) 65* 92
UPPER GREEN RIVER
Big Sandy Opening 9080 4.5 3.0 150 15.9 16.4 97
Blind Bull Sum 8650 26.1 21.2 123 17.3 21.0 82
East Rim Divide 7930 .0 .0 * 12.8 14.0 91
Elkhart Park G.S. 9400 1.7 5.4 31 12.1 16.2 75
Gros Ventre Summit 8750 3.0 5.4 56 13.5 15.6 87
Gunsight Pass 9820 11.2 10.0 112 17.1 17.4 98
Indian Creek 9425 15.6 19.0 82 22.9 24.0 95
Kendall R.S. 7740 .0 .0 * 16.2 16.2 100
Larsen Creek 9000 -M .0 * 15.7 16.8 93
Loomis Park 8240 .9 1.6 56 18.4 20.6 89
New Fork Lake 8340 .0 .0 * 11.5 13.7 84
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 18.5 16.2 114
Spring Creek Divide 9000 19.5 20.8 94 27.1 28.0 97
Triple Peak 8500 13.8 10.4 133 31.1 30.6 102
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Basin Index (%) 99 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 15.4 15.2 101
Buck Pasture 9632 .0 -M * 20.7 -M *
EF Blacks Fork GS 9360 .0 .0 * 17.0 15.8 108
Hams Fork 7840 .0 .0 * 13.5 14.1 96
Henrys Fork 10182 -M -M * 14.5 -M *
Hewinta 9500 .0 .0 * 17.9 17.2 104
Hickerson Park 9122 .0 .0 * 12.7 13.2 96
Hole-in-Rock 9168 .0 .0 * 12.8 13.4 96
Indian Creek 9425 15.6 19.0 82 22.9 24.0 95
Kelley R.S. 8180 1.8 2.1 86 19.2 20.4 94
Spirit Lk 10235 .0 3.1 0 18.4 20.5 90
Steel Creek Park 10158 7.8 14.4 54 21.0 21.0 100
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Basin Index (%) 65* 98
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 16.4 14.6 112
Bug Lake 7987 .1 5.2 2 21.5 20.3 106
Burts Miller Ranch 8000 .0 .0 * 9.9 9.4 105
Chalk Creek #1 9171 7.1 12.8 55 27.4 28.8 95
Giveout 6930 .1 .0 * 14.6 15.7 93
Hayden Fork 9130 .0 .0 * 25.2 24.8 102
Kelley R.S. 8180 1.8 2.1 86 19.2 20.4 94
Lily Lake 9133 .0 .0 * 18.9 20.4 93
Monte Cristo 8932 9.4 15.0 63 29.1 29.8 98
Salt River Summit 7640 .0 .0 * 18.7 19.0 98
Spring Creek Divide 9000 19.5 20.8 94 27.1 28.0 97
Trial Lake 9992 2.6 14.8 18 26.1 27.0 97
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Basin Index (%) 57 98
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
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 or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages 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.
