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 WEDNESDAY: MAY 4 , 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 10.0 9.0 111 20.0 22.8 88
Blind Bull Sum 8650 23.3 24.6 95 16.4 19.4 85
Cottonwood Creek 7670 17.5 16.4 107 28.6 28.2 101
East Rim Divide 7930 1.6 5.7 28 12.3 12.6 98
Grand Targhee 9260 36.0 46.2 78 31.6 36.1 88
Granite Creek 6770 7.4 9.2 80 -M 21.0 *
Grassy Lake 7265 23.5 27.4 86 34.7 38.4 90
Gros Ventre Summit 8750 11.2 11.4 98 12.6 14.8 85
Gunsight Pass 9820 14.7 12.8 115 16.6 16.4 101
Lewis Lake Divide 7850 24.6 29.6 83 34.8 37.0 94
Loomis Park 8240 9.5 11.2 85 17.7 18.6 95
Phillips Bench 8200 22.8 26.7 85 27.1 28.8 94
Salt River Summit 7640 9.9 7.4 134 18.2 17.9 102
Snake River Station 6920 7.6 8.2 93 20.8 24.8 84
Somsen Ranch 6800 5.0 .0 * -M 18.2 *
Spring Creek Divide 9000 23.3 25.1 93 25.9 25.4 102
Thumb Divide 7980 14.9 11.4 131 20.2 21.2 95
Togwotee Pass 9580 23.3 25.2 92 24.7 27.2 91
Triple Peak 8500 20.8 18.8 111 29.0 28.4 102
Two Ocean Plateau 9240 32.7 32.4 101 28.9 29.8 97
Willow Creek 8080 26.3 26.4 100 37.4 37.4 100
Younts Peak 8350 14.2 14.0 101 12.3 17.4 71
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Basin Index (%) 95 93
MADISON HEADWATERS IN WYOMING
Black Bear 8170 31.2 39.8 78 34.0 41.2 83
Canyon 7870 10.9 -M * 14.5 -M *
Madison Plateau 7750 19.6 23.0 85 24.0 28.0 86
West Yellowstone 6700 1.1 .0 * 14.8 15.8 94
Whiskey Creek 6800 12.3 12.6 98 -M 22.7 *
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Basin Index (%) 85 86
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.2 23.8 85 19.3 23.2 83
Canyon 7870 10.9 -M * 14.5 -M *
Evening Star 9200 28.7 26.6 108 27.4 31.8 86
Fisher Creek 9100 32.1 35.8 90 34.5 37.2 93
Monument Peak 8850 20.1 21.8 92 24.2 25.8 94
Northeast Entrance 7350 3.1 1.4 221 13.1 14.6 90
Parker Peak 9400 23.6 24.4 97 23.0 22.8 101
Sylvan Lake 8420 16.9 19.2 88 24.3 26.4 92
Thumb Divide 7980 14.9 11.4 131 20.2 21.2 95
Two Ocean Plateau 9240 32.7 32.4 101 28.9 29.8 97
White Mill 8700 23.1 26.6 87 22.9 25.7 89
Wolverine 7650 8.4 3.6 233 14.8 14.0 106
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Basin Index (%) 99 93
WIND RIVER
Burroughs Creek 8750 10.0 -M * 16.4 -M *
Castle Creek 8400 2.1 .0 * -M 9.8 *
Cold Springs 9630 8.0 3.6 222 15.3 11.4 134
Deer Park 9700 14.8 15.0 99 20.1 22.0 91
Hobbs Park 10100 18.0 16.6 108 19.6 16.8 117
Kirwin 9550 15.1 11.4 132 16.2 14.4 112
Little Warm 9370 12.5 8.9 140 16.7 13.4 125
South Pass 9040 12.6 14.4 88 16.3 18.4 89
St. Lawrence Alt 8620 .8 -M * 11.5 -M *
Togwotee Pass 9580 23.3 25.2 92 24.7 27.2 91
Townsend Creek 8700 10.1 8.6 117 15.7 13.7 115
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Basin Index (%) 112 105
BIGHORN BASIN
Bald Mtn. 9380 19.6 20.6 95 17.4 18.9 92
Bear Trap Meadow 8200 4.1 .7 586 12.1 11.4 106
Bone Springs Div 9350 19.7 17.6 112 16.2 18.4 88
Grave Springs 8550 9.9 8.6 115 13.2 12.2 108
Kirwin 9550 15.1 11.4 132 16.2 14.4 112
Marquette 8760 8.1 7.8 104 12.0 12.2 98
Middle Powder 7760 12.8 10.6 121 13.1 12.6 104
Owl Creek 8975 2.8 .7 400 10.0 8.5 118
Powder River Pass 9480 10.2 9.4 109 11.8 15.2 78
Shell Creek 9580 16.9 16.0 106 16.9 16.2 104
Timber Creek 7950 3.5 2.5 140 11.1 10.4 107
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Basin Index (%) 116 100
SHOSHONE RIVER
Blackwater 9780 24.9 25.8 97 25.6 26.0 98
Evening Star 9200 28.7 26.6 108 27.4 31.8 86
Marquette 8760 8.1 7.8 104 12.0 12.2 98
Sylvan Lake 8420 16.9 19.2 88 24.3 26.4 92
Sylvan Road 7120 .1 3.2 3 -M 18.3 *
Younts Peak 8350 14.2 14.0 101 12.3 17.4 71
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Basin Index (%) 96 89
POWDER RIVER
Bear Trap Meadow 8200 4.1 .7 586 12.1 11.4 106
Cloud Peak Reservoir 9860 16.9 16.3 104 18.7 17.2 109
Grave Springs 8550 9.9 8.6 115 13.2 12.2 108
Hansen Sawmill 8360 5.5 3.6 153 12.4 11.1 112
Middle Powder 7760 12.8 10.6 121 13.1 12.6 104
Powder River Pass 9480 10.2 9.4 109 11.8 15.2 78
Soldier Park 8720 5.7 3.0 190 13.0 11.4 114
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Basin Index (%) 125 104
TONGUE RIVER
Big Goose 7990 10.3 8.5 121 15.2 13.4 113
Bone Springs Div 9350 19.7 17.6 112 16.2 18.4 88
Burgess Junction 7880 14.5 11.2 129 17.4 14.8 118
Dome Lake 8880 15.7 11.2 140 17.8 16.1 111
Little Goose 8870 12.0 10.5 114 18.1 16.1 112
Sucker Creek 8880 15.5 11.3 137 21.2 17.6 120
Tie Creek 6870 4.9 2.0 245 16.4 13.9 118
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Basin Index (%) 128 111
BELLE FOURCHE
Blind Park 6890 .1 .0 * 13.3 13.6 98
Cole Canyon 5910 1.9 .4 475* 13.6 12.0 113
North Rapid Creek 6130 1.7 .0 * 8.6 11.0 78
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Basin Index (%) 925* 97
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 13.3 13.6 98
North Rapid Creek 6130 1.7 .0 * 8.6 11.0 78
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10976 21.0 22.4 94 23.7 25.5 93
Blackhall Mtn 9839 29.1 31.8 92 33.6 35.9 94
Cinnabar Park 9707 15.6 18.3 85 23.6 27.5 86
Columbine 9167 18.6 17.2 108 28.4 29.3 97
Divide Peak 8730 11.3 14.8 76 22.8 25.1 91
Joe Wright 10158 23.8 22.6 105 33.3 30.8 108
Laprele Creek 8390 5.2 5.4 96 14.4 15.0 96
Med Bow 10512 36.3 -M * 34.5 -M *
Never Summer 10323 24.4 22.7 107 19.9 20.6 97
North French Creek 10153 27.8 32.6 85 30.2 33.0 92
Old Battle 9860 31.5 35.2 89 34.8 38.8 90
Rawah 9069 8.7 6.0 145 18.0 19.4 93
Sage Creek Basin 7850 .6 .1 600* 12.3 14.7 84
Sand Lake 10098 29.8 31.9 93 30.0 29.4 102
South Brush Creek 8495 3.5 6.2 56 14.7 16.8 88
Tower 10620 43.5 47.8 91 46.5 45.2 103
Webber Springs 9260 19.1 21.0 91 28.5 30.0 95
Whiskey Park 9020 27.0 26.8 101 33.3 33.2 100
Willow Creek Pass 9523 14.2 15.2 93 16.5 16.6 99
Zirkel 9338 17.9 22.0 81 35.3 35.1 101
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Basin Index (%) 93 96
SWEETWATER
Deer Park 9700 14.8 15.0 99 20.1 22.0 91
Larsen Creek 9000 -M 3.2 * 14.8 16.1 92
South Pass 9040 12.6 14.4 88 16.3 18.4 89
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Basin Index (%) 93 91
LOWER N. PLATTE
Casper Mtn. 7920 12.3 12.0 102 19.0 17.8 107
Laprele Creek 8390 5.2 5.4 96 14.4 15.0 96
Reno Hill 8430 14.7 13.7 107 21.7 18.9 115
Windy Peak 7915 3.9 3.8 103 12.5 13.4 93
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Basin Index (%) 103 104
LARAMIE RIVER
Brooklyn Lake 10250 20.2 22.8 89 26.2 25.3 104
Cinnabar Park 9707 15.6 18.3 85 23.6 27.5 86
Crow Creek 8335 .2 .2 100* 11.6 13.2 88
Deadman Hill 10239 21.5 19.7 109 21.4 21.4 100
Rawah 9069 8.7 6.0 145 18.0 19.4 93
Roach 9740 15.5 16.6 93 23.2 21.8 106
Windy Peak 7915 3.9 3.8 103 12.5 13.4 93
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Basin Index (%) 98 96
S. PLATTE
Crow Creek 8335 .2 .2 100* 11.6 13.2 88
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Basin Index (%) 100* 88
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 17.8 17.6 101
Divide Peak 8730 11.3 14.8 76 22.8 25.1 91
Elk River 8739 12.3 11.8 104 24.9 23.0 108
Elkhead Divide 8800 14.4 -M * 24.4 -M *
Little Snake River 8928 19.8 23.5 84 34.9 37.1 94
Old Battle 9860 31.5 35.2 89 34.8 38.8 90
Sage Creek Basin 7850 .6 .1 600* 12.3 14.7 84
Sandstone RS 8152 3.8 5.0 76 17.6 20.2 87
Whiskey Park 9020 27.0 26.8 101 33.3 33.2 100
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Basin Index (%) 91 95
UPPER GREEN RIVER
Big Sandy Opening 9080 11.6 10.6 109 14.8 15.0 99
Blind Bull Sum 8650 23.3 24.6 95 16.4 19.4 85
East Rim Divide 7930 1.6 5.7 28 12.3 12.6 98
Elkhart Park G.S. 9400 9.3 10.6 88 11.7 13.9 84
Gros Ventre Summit 8750 11.2 11.4 98 12.6 14.8 85
Gunsight Pass 9820 14.7 12.8 115 16.6 16.4 101
Indian Creek 9425 22.4 21.6 104 22.1 21.6 102
Kendall R.S. 7740 4.0 3.7 108 15.5 14.7 105
Larsen Creek 9000 -M 3.2 * 14.8 16.1 92
Loomis Park 8240 9.5 11.2 85 17.7 18.6 95
New Fork Lake 8340 4.8 5.1 94 11.3 12.2 93
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 5.1 6.7 76 17.5 15.2 115
Spring Creek Divide 9000 23.3 25.1 93 25.9 25.4 102
Triple Peak 8500 20.8 18.8 111 29.0 28.4 102
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Basin Index (%) 96 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.0 2.8 71 14.8 14.4 103
Buck Pasture 9632 9.8 -M * 19.3 -M *
EF Blacks Fork GS 9360 2.9 7.4 39 14.3 13.6 105
Hams Fork 7840 .1 .9 11* 13.0 12.1 107
Henrys Fork 10182 -M -M * 13.8 -M *
Hewinta 9500 3.1 4.5 69 17.1 16.1 106
Hickerson Park 9122 .2 3.0 7 11.9 12.3 97
Hole-in-Rock 9168 .0 2.0 0 12.0 12.0 100
Indian Creek 9425 22.4 21.6 104 22.1 21.6 102
Kelley R.S. 8180 9.7 10.4 93 18.6 18.1 103
Spirit Lk 10235 5.8 12.6 46 17.9 19.9 90
Steel Creek Park 10158 15.1 17.6 86 20.0 19.2 104
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Basin Index (%) 74 102
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 15.7 13.8 114
Bug Lake 7987 12.1 13.8 88 21.1 19.5 108
Burts Miller Ranch 8000 .0 .0 * 9.3 8.7 107
Chalk Creek #1 9171 18.8 22.0 85 26.1 26.0 100
Giveout 6930 .2 .0 * 13.9 13.8 101
Hayden Fork 9130 1.7 8.2 21 24.4 23.4 104
Kelley R.S. 8180 9.7 10.4 93 18.6 18.1 103
Lily Lake 9133 6.4 9.7 66 18.0 18.4 98
Monte Cristo 8932 19.0 23.0 83 28.4 28.1 101
Salt River Summit 7640 9.9 7.4 134 18.2 17.9 102
Spring Creek Divide 9000 23.3 25.1 93 25.9 25.4 102
Trial Lake 9992 19.3 22.0 88 24.9 25.0 100
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Basin Index (%) 85 103
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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.
