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 19 , 2024
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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 -M .0 * 23.9 24.5 98
Blind Bull Sum 8650 27.5 22.2 124 19.8 20.8 95
Cottonwood Creek 7670 7.4 8.7 85 31.0 30.0 103
East Rim Divide 7930 -M .0 * 13.6 13.9 98
Grand Targhee 9260 38.8 43.7 89 36.7 37.8 97
Granite Creek 6770 -M .0 * 20.2 22.5 90
Grassy Lake 7265 14.0 17.0 82 38.5 41.3 93
Gros Ventre Summit 8750 3.6 6.0 60 -M 15.4 *
Gunsight Pass 9820 8.4 10.2 82 18.1 17.4 104
Lewis Lake Divide 7850 17.5 22.4 78 39.3 39.3 100
Loomis Park 8240 .2 2.8 7 18.1 20.6 88
Phillips Bench 8200 20.3 20.1 101 33.8 31.0 109
Salt River Summit 7640 -M .0 * 16.9 19.0 89
Snake River Station 6920 .0 .0 * 25.3 26.8 94
Somsen Ranch 6800 -M .0 * 24.0 19.6 122
Spring Creek Divide 9000 21.0 21.0 100 26.1 27.8 94
Thumb Divide 7980 3.5 1.2 292* 20.9 22.4 93
Togwotee Pass 9580 18.6 22.8 82 25.2 29.0 87
Triple Peak 8500 11.7 11.5 102 29.9 30.3 99
Two Ocean Plateau 9240 26.7 30.0 89 30.8 31.2 99
Willow Creek 8080 18.1 18.4 98 40.4 40.2 100
Younts Peak 8350 .6 8.4 7 18.6 18.8 99
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Basin Index (%) 89 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 28.2 35.6 79 41.9 43.0 97
Canyon 7870 2.2 -M * 15.8 -M *
Madison Plateau 7750 11.8 15.2 78 26.1 30.6 85
West Yellowstone 6700 -M .0 * 14.9 17.0 88
Whiskey Creek 6800 3.3 5.6 59 21.7 24.4 89
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Basin Index (%) 77 91
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.8 23.3 81 20.9 25.3 83
Canyon 7870 2.2 -M * 15.8 -M *
Evening Star 9200 16.6 23.6 70 31.0 33.8 92
Fisher Creek 9100 23.2 35.7 65 32.1 40.9 78
Monument Peak 8850 13.3 18.7 71 24.2 27.4 88
Northeast Entrance 7350 .1 .0 * 14.2 16.2 88
Parker Peak 9400 19.3 19.3 100 27.2 24.3 112
Sylvan Lake 8420 7.1 13.5 53 27.4 28.0 98
Thumb Divide 7980 3.5 1.2 292* 20.9 22.4 93
Two Ocean Plateau 9240 26.7 30.0 89 30.8 31.2 99
White Mill 8700 15.9 23.4 68 22.4 27.6 81
Wolverine 7650 .1 .0 * 16.0 15.4 104
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Basin Index (%) 77 91
WIND RIVER
Burroughs Creek 8750 .2 -M * 13.9 -M *
Castle Creek 8400 .0 .0 * 10.2 11.8 86
Cold Springs 9630 .1 .0 * 14.9 13.6 110
Deer Park 9700 17.0 10.8 157 26.9 23.5 114
Hobbs Park 10100 20.0 15.0 133 24.2 19.0 127
Kirwin 9550 9.6 9.5 101 20.0 17.0 118
Little Warm 9370 4.1 3.0 137 17.6 15.6 113
South Pass 9040 12.1 8.4 144 23.5 20.2 116
St. Lawrence Alt 8620 .0 -M * 14.9 -M *
Togwotee Pass 9580 18.6 22.8 82 25.2 29.0 87
Townsend Creek 8700 6.6 1.2 550 19.8 15.8 125
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Basin Index (%) 125 110
BIGHORN BASIN
Bald Mtn. 9380 18.3 18.8 97 18.8 20.3 93
Bear Trap Meadow 8200 -M .0 * 13.4 12.7 106
Bone Springs Div 9350 16.0 14.8 108 16.9 19.5 87
Grave Springs 8550 2.2 3.7 59 14.4 13.4 107
Kirwin 9550 9.6 9.5 101 20.0 17.0 118
Marquette 8760 13.2 4.8 275 22.9 15.1 152
Middle Powder 7760 8.5 4.4 193 15.3 14.0 109
Owl Creek 8975 -M .0 * 12.2 9.6 127
Powder River Pass 9480 3.5 6.6 53 16.5 17.4 95
Shell Creek 9580 15.4 14.6 105 18.8 17.8 106
Timber Creek 7950 2.4 .0 * 17.1 12.4 138
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Basin Index (%) 115 110
SHOSHONE RIVER
Blackwater 9780 23.6 23.0 103 28.4 27.8 102
Evening Star 9200 16.6 23.6 70 31.0 33.8 92
Marquette 8760 13.2 4.8 275 22.9 15.1 152
Sylvan Lake 8420 7.1 13.5 53 27.4 28.0 98
Sylvan Road 7120 -M .0 * 17.5 19.3 91
Younts Peak 8350 .6 8.4 7 18.6 18.8 99
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Basin Index (%) 83 102
POWDER RIVER
Bear Trap Meadow 8200 -M .0 * 13.4 12.7 106
Cloud Peak Reservoir 9860 15.9 14.0 114 22.3 19.8 113
Grave Springs 8550 2.2 3.7 59 14.4 13.4 107
Hansen Sawmill 8360 -M .0 * 13.8 13.2 105
Middle Powder 7760 8.5 4.4 193 15.3 14.0 109
Powder River Pass 9480 3.5 6.6 53 16.5 17.4 95
Soldier Park 8720 .1 .0 * 14.3 13.1 109
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Basin Index (%) 105 106
TONGUE RIVER
Big Goose 7990 4.6 5.1 90 17.3 16.4 105
Bone Springs Div 9350 16.0 14.8 108 16.9 19.5 87
Burgess Junction 7880 7.0 7.6 92 17.7 16.5 107
Dome Lake 8880 -M 7.0 * 19.0 19.5 97
Little Goose 8870 9.0 7.2 125 20.6 17.6 117
Sucker Creek 8880 8.8 8.2 107 22.2 20.8 107
Tie Creek 6870 -M .0 * 17.2 16.8 102
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Basin Index (%) 106 103
BELLE FOURCHE
Blind Park 6890 .0 .0 * 12.5 15.1 83
Cole Canyon 5910 .0 .0 * 13.4 14.0 96
North Rapid Creek 6130 -M .0 * 12.6 13.2 95
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Basin Index (%) * 91
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.5 15.1 83
North Rapid Creek 6130 -M .0 * 12.6 13.2 95
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10976 21.8 19.4 112 27.4 28.2 97
Blackhall Mtn 9839 32.9 28.5 115 41.8 39.3 106
Cinnabar Park 9707 13.5 13.6 99 27.7 28.5 97
Columbine 9167 5.7 2.2 259* 31.2 31.1 100
Divide Peak 8730 7.9 5.9 134 29.7 25.8 115
Joe Wright 10158 20.2 19.6 103 32.0 33.3 96
Laprele Creek 8390 .1 .0 * 17.4 16.7 104
Med Bow 10512 -M -M * -M -M *
Never Summer 10323 23.4 20.0 117 20.9 21.9 95
North French Creek 10153 27.0 30.1 90 34.1 35.8 95
Old Battle 9860 34.0 33.3 102 40.5 41.8 97
Rawah 9069 4.1 .1 4100* 21.2 20.2 105
Sage Creek Basin 7850 -M .0 * 19.1 16.6 115
Sand Lake 10098 35.2 28.4 124 37.1 32.2 115
South Brush Creek 8495 .2 .0 * 16.2 19.0 85
Tower 10620 44.6 44.2 101 48.6 49.4 98
Webber Springs 9260 17.1 11.2 153 31.1 32.1 97
Whiskey Park 9020 27.2 23.4 116 35.3 36.0 98
Willow Creek Pass 9523 12.0 11.4 105 18.9 17.7 107
Zirkel 9338 8.3 9.8 85 35.0 35.8 98
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Basin Index (%) 111 101
SWEETWATER
Deer Park 9700 17.0 10.8 157 26.9 23.5 114
Larsen Creek 9000 -M .0 * 16.7 16.6 101
South Pass 9040 12.1 8.4 144 23.5 20.2 116
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Basin Index (%) 152 111
LOWER N. PLATTE
Casper Mtn. 7920 6.2 3.4 182 22.4 18.8 119
Laprele Creek 8390 .1 .0 * 17.4 16.7 104
Reno Hill 8430 8.8 6.8 129 22.3 21.7 103
Windy Peak 7915 .1 .0 * 15.3 14.4 106
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Basin Index (%) 149 108
LARAMIE RIVER
Brooklyn Lake 10250 19.3 16.8 115 31.5 27.8 113
Cinnabar Park 9707 13.5 13.6 99 27.7 28.5 97
Crow Creek 8335 .0 .0 * 13.0 14.4 90
Deadman Hill 10239 18.9 16.8 112 23.9 23.8 100
Rawah 9069 4.1 .1 4100* 21.2 20.2 105
Roach 9740 8.6 9.9 87 22.0 24.2 91
Windy Peak 7915 .1 .0 * 15.3 14.4 106
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Basin Index (%) 113 101
S. PLATTE
Crow Creek 8335 .0 .0 * 13.0 14.4 90
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Basin Index (%) * 90
LITTLE SNAKE RIVER
Battle Mountain 7498 .2 .0 * 22.1 18.6 119
Divide Peak 8730 7.9 5.9 134 29.7 25.8 115
Elk River 8739 .1 .0 * 23.5 23.7 99
Elkhead Divide 8800 8.6 -M * 28.0 -M *
Little Snake River 8928 17.4 13.0 134 39.8 39.4 101
Old Battle 9860 34.0 33.3 102 40.5 41.8 97
Sage Creek Basin 7850 -M .0 * 19.1 16.6 115
Sandstone RS 8152 .2 .0 * 22.1 21.6 102
Whiskey Park 9020 27.2 23.4 116 35.3 36.0 98
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Basin Index (%) 115 104
UPPER GREEN RIVER
Big Sandy Opening 9080 4.0 4.2 95 17.4 16.2 107
Blind Bull Sum 8650 27.5 22.2 124 19.8 20.8 95
East Rim Divide 7930 -M .0 * 13.6 13.9 98
Elkhart Park G.S. 9400 1.9 6.0 32 14.2 16.0 89
Gros Ventre Summit 8750 3.6 6.0 60 -M 15.4 *
Gunsight Pass 9820 8.4 10.2 82 18.1 17.4 104
Indian Creek 9425 17.6 19.4 91 24.2 23.8 102
Kendall R.S. 7740 .0 .0 * 15.5 16.0 97
Larsen Creek 9000 -M .0 * 16.7 16.6 101
Loomis Park 8240 .2 2.8 7 18.1 20.6 88
New Fork Lake 8340 -M .0 * -M 13.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 16.3 16.1 101
Spring Creek Divide 9000 21.0 21.0 100 26.1 27.8 94
Triple Peak 8500 11.7 11.5 102 29.9 30.3 99
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Basin Index (%) 93 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 .5 .0 * 17.2 15.1 114
Buck Pasture 9632 7.0 -M * 21.4 -M *
EF Blacks Fork GS 9360 1.7 .0 * 14.0 15.4 91
Hams Fork 7840 -M .0 * 14.0 14.1 99
Henrys Fork 10182 -M -M * 17.7 -M *
Hewinta 9500 -M .0 * 18.7 17.1 109
Hickerson Park 9122 -M .0 * 16.4 13.2 124
Hole-in-Rock 9168 -M .0 * 14.2 13.4 106
Indian Creek 9425 17.6 19.4 91 24.2 23.8 102
Kelley R.S. 8180 3.5 2.3 152 21.0 20.0 105
Spirit Lk 10235 7.3 4.2 174 23.1 20.5 113
Steel Creek Park 10158 15.2 14.8 103 22.6 21.0 108
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Basin Index (%) 113* 107
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 17.2 14.5 119
Bug Lake 7987 6.0 6.8 88 26.3 20.2 130
Burts Miller Ranch 8000 .3 .0 * 14.4 9.4 153
Chalk Creek #1 9171 -M 13.8 * -M 28.7 *
Giveout 6930 -M .0 * 15.1 15.4 98
Hayden Fork 9130 .0 .0 * 27.8 24.8 112
Kelley R.S. 8180 3.5 2.3 152 21.0 20.0 105
Lily Lake 9133 2.9 .0 * 19.2 20.2 95
Monte Cristo 8932 20.5 15.6 131 34.2 29.8 115
Salt River Summit 7640 -M .0 * 16.9 19.0 89
Spring Creek Divide 9000 21.0 21.0 100 26.1 27.8 94
Trial Lake 9992 22.0 16.3 135 31.4 27.0 116
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Basin Index (%) 123* 109
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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.