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: MAY 21 , 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 .0 .0 * 20.9 24.6 85
Blind Bull Sum 8650 24.8 21.2 117 17.4 21.0 83
Cottonwood Creek 7670 9.2 6.7 137 29.9 30.0 100
East Rim Divide 7930 .0 .0 * 12.8 14.1 91
Grand Targhee 9260 31.6 43.4 73 32.8 38.4 85
Granite Creek 6770 .0 .0 * 17.3 22.6 77
Grassy Lake 7265 15.9 14.9 107 36.4 41.4 88
Gros Ventre Summit 8750 2.7 4.6 59 13.6 15.6 87
Gunsight Pass 9820 11.0 9.6 115 17.2 17.4 99
Lewis Lake Divide 7850 16.8 21.4 79 37.0 39.3 94
Loomis Park 8240 .6 .7 86* 18.5 20.6 90
Phillips Bench 8200 16.2 18.8 86 28.2 31.2 90
Salt River Summit 7640 .0 .0 * 18.7 19.0 98
Snake River Station 6920 .1 .0 * 21.3 26.9 79
Somsen Ranch 6800 .0 .0 * -M 19.8 *
Spring Creek Divide 9000 19.8 20.4 97 27.3 28.0 98
Thumb Divide 7980 6.7 .2 3350* 22.3 22.4 100
Togwotee Pass 9580 22.1 22.6 98 27.2 29.4 93
Triple Peak 8500 14.0 9.7 144 31.2 30.6 102
Two Ocean Plateau 9240 30.3 28.7 106 31.2 31.4 99
Willow Creek 8080 17.5 16.4 107 38.8 40.4 96
Younts Peak 8350 2.5 6.3 40 15.2 18.8 81
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Basin Index (%) 98 91
MADISON HEADWATERS IN WYOMING
Black Bear 8170 29.7 34.0 87 35.7 43.0 83
Canyon 7870 6.0 -M * 16.4 -M *
Madison Plateau 7750 13.8 13.6 101 25.8 30.7 84
West Yellowstone 6700 .0 .0 * 16.3 17.0 96
Whiskey Creek 6800 6.7 4.3 156 -M 24.6 *
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Basin Index (%) 97 86
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.9 22.1 95 21.7 25.4 85
Canyon 7870 6.0 -M * 16.4 -M *
Evening Star 9200 29.0 21.9 132 31.2 34.0 92
Fisher Creek 9100 33.8 35.2 96 38.7 41.0 94
Monument Peak 8850 19.4 17.4 111 27.7 27.6 100
Northeast Entrance 7350 .0 .0 * 15.5 16.3 95
Parker Peak 9400 23.7 18.3 130 26.2 24.4 107
Sylvan Lake 8420 13.1 11.8 111 27.1 28.2 96
Thumb Divide 7980 6.7 .2 3350* 22.3 22.4 100
Two Ocean Plateau 9240 30.3 28.7 106 31.2 31.4 99
White Mill 8700 23.3 22.8 102 25.8 27.6 93
Wolverine 7650 .0 .0 * 16.7 15.6 107
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Basin Index (%) 112 97
WIND RIVER
Burroughs Creek 8750 1.6 -M * 17.3 -M *
Castle Creek 8400 .0 .0 * -M 11.9 *
Cold Springs 9630 .6 .0 * 16.5 13.6 121
Deer Park 9700 10.5 9.6 109 21.9 24.3 90
Hobbs Park 10100 16.6 13.7 121 22.2 19.2 116
Kirwin 9550 10.7 8.0 134 18.2 17.2 106
Little Warm 9370 6.9 1.8 383 17.4 15.7 111
South Pass 9040 6.0 7.6 79 18.4 20.6 89
St. Lawrence Alt 8620 .2 -M * 12.8 -M *
Togwotee Pass 9580 22.1 22.6 98 27.2 29.4 93
Townsend Creek 8700 2.6 .4 650* 17.6 16.1 109
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Basin Index (%) 119 102
BIGHORN BASIN
Bald Mtn. 9380 17.8 18.4 97 19.1 20.4 94
Bear Trap Meadow 8200 .0 .0 * 13.2 12.8 103
Bone Springs Div 9350 15.4 13.8 112 17.2 19.6 88
Grave Springs 8550 3.4 1.2 283 14.4 13.4 107
Kirwin 9550 10.7 8.0 134 18.2 17.2 106
Marquette 8760 1.2 3.1 39 13.3 15.6 85
Middle Powder 7760 5.9 2.8 211 14.5 14.3 101
Owl Creek 8975 .2 .0 * 10.7 9.8 109
Powder River Pass 9480 4.6 5.0 92 12.8 17.4 74
Shell Creek 9580 15.1 14.2 106 18.5 17.9 103
Timber Creek 7950 .5 .0 * 12.4 12.5 99
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Basin Index (%) 112 96
SHOSHONE RIVER
Blackwater 9780 26.5 22.4 118 29.5 28.2 105
Evening Star 9200 29.0 21.9 132 31.2 34.0 92
Marquette 8760 1.2 3.1 39 13.3 15.6 85
Sylvan Lake 8420 13.1 11.8 111 27.1 28.2 96
Sylvan Road 7120 .1 .0 * -M 19.4 *
Younts Peak 8350 2.5 6.3 40 15.2 18.8 81
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Basin Index (%) 111 93
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 13.2 12.8 103
Cloud Peak Reservoir 9860 12.7 12.0 106 20.1 20.0 100
Grave Springs 8550 3.4 1.2 283 14.4 13.4 107
Hansen Sawmill 8360 .0 .0 * 12.9 13.2 98
Middle Powder 7760 5.9 2.8 211 14.5 14.3 101
Powder River Pass 9480 4.6 5.0 92 12.8 17.4 74
Soldier Park 8720 .1 .1 100* 13.6 13.2 103
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Basin Index (%) 127 97
TONGUE RIVER
Big Goose 7990 3.7 3.0 123 16.3 16.4 99
Bone Springs Div 9350 15.4 13.8 112 17.2 19.6 88
Burgess Junction 7880 10.2 5.8 176 18.8 16.8 112
Dome Lake 8880 9.3 5.6 166 19.1 19.8 96
Little Goose 8870 6.7 5.5 122 19.8 18.0 110
Sucker Creek 8880 10.0 7.6 132 22.8 21.2 108
Tie Creek 6870 .5 .0 * 18.0 17.0 106
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Basin Index (%) 135 102
BELLE FOURCHE
Blind Park 6890 .0 .0 * 15.9 15.2 105
Cole Canyon 5910 .0 .0 * 15.8 14.0 113
North Rapid Creek 6130 -M .0 * 9.6 13.4 72
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Basin Index (%) * 97
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 15.9 15.2 105
North Rapid Creek 6130 -M .0 * 9.6 13.4 72
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10976 11.5 19.1 60 25.7 28.4 90
Blackhall Mtn 9839 18.7 28.8 65 36.0 39.5 91
Cinnabar Park 9707 4.8 11.5 42 25.1 28.9 87
Columbine 9167 .0 .4 0* 29.7 31.2 95
Divide Peak 8730 .2 4.5 4 24.4 25.9 94
Joe Wright 10158 17.5 18.8 93 37.2 33.9 110
Laprele Creek 8390 .0 .0 * 15.2 16.8 90
Med Bow 10512 31.1 -M * 37.3 -M *
Never Summer 10323 20.6 19.9 104 23.0 22.4 103
North French Creek 10153 21.1 28.3 75 33.0 36.1 91
Old Battle 9860 26.8 32.6 82 36.9 42.0 88
Rawah 9069 .8 .4 200* 21.5 20.4 105
Sage Creek Basin 7850 -M .0 * 13.4 16.7 80
Sand Lake 10098 25.9 27.4 95 32.7 32.4 101
South Brush Creek 8495 .9 .0 * 16.6 19.0 87
Tower 10620 36.1 42.2 86 48.8 49.4 99
Webber Springs 9260 9.0 9.8 92 30.4 32.2 94
Whiskey Park 9020 -M 21.4 * 34.9 36.0 97
Willow Creek Pass 9523 6.2 10.6 58 19.2 17.8 108
Zirkel 9338 2.2 9.0 24 37.2 35.9 104
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Basin Index (%) 77 96
SWEETWATER
Deer Park 9700 10.5 9.6 109 21.9 24.3 90
Larsen Creek 9000 -M .0 * 15.9 16.9 94
South Pass 9040 6.0 7.6 79 18.4 20.6 89
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Basin Index (%) 96 91
LOWER N. PLATTE
Casper Mtn. 7920 1.6 2.4 67 19.9 19.0 105
Laprele Creek 8390 .0 .0 * 15.2 16.8 90
Reno Hill 8430 6.7 3.8 176 22.9 21.9 105
Windy Peak 7915 .2 .0 * 13.5 14.6 92
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Basin Index (%) 137 99
LARAMIE RIVER
Brooklyn Lake 10250 8.7 15.4 56 28.0 28.0 100
Cinnabar Park 9707 4.8 11.5 42 25.1 28.9 87
Crow Creek 8335 .5 .0 * 12.8 14.5 88
Deadman Hill 10239 9.4 15.8 59 24.5 24.0 102
Rawah 9069 .8 .4 200* 21.5 20.4 105
Roach 9740 4.3 9.4 46 25.1 24.2 104
Windy Peak 7915 .2 .0 * 13.5 14.6 92
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Basin Index (%) 55 97
S. PLATTE
Crow Creek 8335 .5 .0 * 12.8 14.5 88
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Basin Index (%) * 88
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 19.0 19.2 99
Divide Peak 8730 .2 4.5 4 24.4 25.9 94
Elk River 8739 .5 .0 * 26.0 23.7 110
Elkhead Divide 8800 .6 -M * -M -M *
Little Snake River 8928 7.1 12.0 59 36.8 39.6 93
Old Battle 9860 26.8 32.6 82 36.9 42.0 88
Sage Creek Basin 7850 -M .0 * 13.4 16.7 80
Sandstone RS 8152 .4 .0 * 18.8 21.7 87
Whiskey Park 9020 -M 21.4 * 34.9 36.0 97
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Basin Index (%) 71* 94
UPPER GREEN RIVER
Big Sandy Opening 9080 4.5 1.6 281 15.9 16.4 97
Blind Bull Sum 8650 24.8 21.2 117 17.4 21.0 83
East Rim Divide 7930 .0 .0 * 12.8 14.1 91
Elkhart Park G.S. 9400 1.3 4.2 31 12.1 16.4 74
Gros Ventre Summit 8750 2.7 4.6 59 13.6 15.6 87
Gunsight Pass 9820 11.0 9.6 115 17.2 17.4 99
Indian Creek 9425 16.2 17.8 91 23.1 24.1 96
Kendall R.S. 7740 .0 .0 * 16.2 16.2 100
Larsen Creek 9000 -M .0 * 15.9 16.9 94
Loomis Park 8240 .6 .7 86* 18.5 20.6 90
New Fork Lake 8340 .0 .0 * 11.5 13.7 84
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .0 * 18.7 16.4 114
Spring Creek Divide 9000 19.8 20.4 97 27.3 28.0 98
Triple Peak 8500 14.0 9.7 144 31.2 30.6 102
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Basin Index (%) 106 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 .0 * 15.6 15.2 103
Buck Pasture 9632 .2 -M * 20.9 -M *
EF Blacks Fork GS 9360 .0 .0 * 17.2 16.2 106
Hams Fork 7840 .0 .0 * 13.7 14.2 96
Henrys Fork 10182 -M -M * 14.7 -M *
Hewinta 9500 .0 .0 * 18.0 17.2 105
Hickerson Park 9122 .0 .0 * 12.8 13.4 96
Hole-in-Rock 9168 .0 .0 * 12.9 13.4 96
Indian Creek 9425 16.2 17.8 91 23.1 24.1 96
Kelley R.S. 8180 1.9 1.6 119 19.3 20.4 95
Spirit Lk 10235 .2 3.2 6 17.4 20.5 85
Steel Creek Park 10158 8.1 13.6 60 21.2 21.0 101
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Basin Index (%) 74* 97
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 16.5 14.8 111
Bug Lake 7987 .1 3.6 3 21.6 20.4 106
Burts Miller Ranch 8000 -M .0 * 9.8 9.5 103
Chalk Creek #1 9171 7.1 11.8 60 27.3 28.8 95
Giveout 6930 .0 .0 * 14.6 16.0 91
Hayden Fork 9130 .1 .0 * 25.4 24.8 102
Kelley R.S. 8180 1.9 1.6 119 19.3 20.4 95
Lily Lake 9133 .0 .0 * 19.0 20.5 93
Monte Cristo 8932 9.6 14.2 68 29.2 29.8 98
Salt River Summit 7640 .0 .0 * 18.7 19.0 98
Spring Creek Divide 9000 19.8 20.4 97 27.3 28.0 98
Trial Lake 9992 2.6 13.8 19 26.3 27.1 97
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Basin Index (%) 63 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.
