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 3 , 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 8.2 9.5 86 22.3 22.8 98
Blind Bull Sum 8650 25.7 24.6 104 18.4 19.4 95
Cottonwood Creek 7670 13.8 17.2 80 28.8 28.2 102
East Rim Divide 7930 -M 5.9 * 12.6 12.6 100
Grand Targhee 9260 42.8 45.8 93 33.3 36.0 92
Granite Creek 6770 7.2 9.6 75 17.7 21.0 84
Grassy Lake 7265 23.5 27.9 84 37.2 38.4 97
Gros Ventre Summit 8750 9.3 11.7 79 -M 14.7 *
Gunsight Pass 9820 11.7 13.0 90 16.3 16.2 101
Lewis Lake Divide 7850 27.4 29.8 92 38.2 37.0 103
Loomis Park 8240 5.9 11.5 51 16.5 18.6 89
Phillips Bench 8200 23.5 27.1 87 30.9 28.8 107
Salt River Summit 7640 7.1 7.9 90 15.5 17.8 87
Snake River Station 6920 8.0 9.0 89 24.4 24.8 98
Somsen Ranch 6800 6.3 .2 3150* 22.8 18.2 125
Spring Creek Divide 9000 23.9 25.2 95 24.3 25.4 96
Thumb Divide 7980 13.4 12.0 112 20.0 20.9 96
Togwotee Pass 9580 20.6 25.2 82 22.0 27.2 81
Triple Peak 8500 17.9 19.1 94 27.4 28.4 96
Two Ocean Plateau 9240 30.2 32.4 93 28.7 29.6 97
Willow Creek 8080 27.4 27.2 101 37.9 37.2 102
Younts Peak 8350 9.7 13.7 71 16.7 17.3 97
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Basin Index (%) 91 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.0 40.0 85 41.1 41.0 100
Canyon 7870 9.2 -M * 15.0 -M *
Madison Plateau 7750 19.1 23.0 83 25.4 27.8 91
West Yellowstone 6700 -M .0 * 14.9 15.8 94
Whiskey Creek 6800 10.6 13.0 82 21.6 22.6 96
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Basin Index (%) 84 96
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.1 23.9 76 17.9 23.1 77
Canyon 7870 9.2 -M * 15.0 -M *
Evening Star 9200 20.8 26.9 77 29.4 31.6 93
Fisher Creek 9100 24.6 35.6 69 28.8 37.0 78
Monument Peak 8850 15.3 21.8 70 21.2 25.5 83
Northeast Entrance 7350 .0 2.4 0 12.2 14.6 84
Parker Peak 9400 21.3 24.2 88 24.6 22.7 108
Sylvan Lake 8420 12.7 19.3 66 25.2 26.4 95
Thumb Divide 7980 13.4 12.0 112 20.0 20.9 96
Two Ocean Plateau 9240 30.2 32.4 93 28.7 29.6 97
White Mill 8700 18.6 26.6 70 20.3 25.7 79
Wolverine 7650 .1 4.4 2 14.7 13.9 106
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Basin Index (%) 76 90
WIND RIVER
Burroughs Creek 8750 6.8 -M * 13.2 -M *
Castle Creek 8400 .1 .2 50* 9.3 9.6 97
Cold Springs 9630 4.0 4.0 100 13.9 11.3 123
Deer Park 9700 17.3 15.1 115 23.6 21.8 108
Hobbs Park 10100 18.0 16.7 108 20.0 16.6 120
Kirwin 9550 13.9 11.4 122 18.1 14.4 126
Little Warm 9370 8.9 9.2 97 15.9 13.4 119
South Pass 9040 14.0 14.7 95 20.0 18.2 110
St. Lawrence Alt 8620 .8 -M * 12.8 -M *
Togwotee Pass 9580 20.6 25.2 82 22.0 27.2 81
Townsend Creek 8700 8.8 9.0 98 16.4 13.7 120
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Basin Index (%) 100 109
BIGHORN BASIN
Bald Mtn. 9380 15.3 20.5 75 14.9 18.6 80
Bear Trap Meadow 8200 -M 1.0 * 11.0 11.2 98
Bone Springs Div 9350 15.0 17.6 85 14.4 18.4 78
Grave Springs 8550 4.7 8.7 54 11.3 12.2 93
Kirwin 9550 13.9 11.4 122 18.1 14.4 126
Marquette 8760 15.5 7.8 199 19.4 12.2 159
Middle Powder 7760 10.3 11.1 93 11.8 12.5 94
Owl Creek 8975 1.5 1.0 150 10.8 8.5 127
Powder River Pass 9480 4.8 9.6 50 13.4 15.2 88
Shell Creek 9580 14.6 16.1 91 15.5 16.2 96
Timber Creek 7950 5.6 2.8 200 15.5 10.4 149
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Basin Index (%) 95 104
SHOSHONE RIVER
Blackwater 9780 24.5 25.8 95 26.3 25.6 103
Evening Star 9200 20.8 26.9 77 29.4 31.6 93
Marquette 8760 15.5 7.8 199 19.4 12.2 159
Sylvan Lake 8420 12.7 19.3 66 25.2 26.4 95
Sylvan Road 7120 -M 3.8 * 16.6 18.2 91
Younts Peak 8350 9.7 13.7 71 16.7 17.3 97
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Basin Index (%) 89 102
POWDER RIVER
Bear Trap Meadow 8200 -M 1.0 * 11.0 11.2 98
Cloud Peak Reservoir 9860 13.1 16.2 81 17.4 17.2 101
Grave Springs 8550 4.7 8.7 54 11.3 12.2 93
Hansen Sawmill 8360 2.2 3.8 58 11.9 11.0 108
Middle Powder 7760 10.3 11.1 93 11.8 12.5 94
Powder River Pass 9480 4.8 9.6 50 13.4 15.2 88
Soldier Park 8720 .1 3.6 3 12.2 11.4 107
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Basin Index (%) 66 98
TONGUE RIVER
Big Goose 7990 6.6 8.6 77 13.6 13.3 102
Bone Springs Div 9350 15.0 17.6 85 14.4 18.4 78
Burgess Junction 7880 9.4 11.6 81 14.2 14.8 96
Dome Lake 8880 -M 11.4 * 14.8 16.1 92
Little Goose 8870 9.2 10.5 88 15.8 16.0 99
Sucker Creek 8880 10.0 11.8 85 17.3 17.4 99
Tie Creek 6870 .1 2.0 5 14.0 13.8 101
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Basin Index (%) 81 95
BELLE FOURCHE
Blind Park 6890 .0 .1 0* 8.0 13.6 59
Cole Canyon 5910 -M .4 * 8.2 12.0 68
North Rapid Creek 6130 -M .4 * 10.5 10.8 97
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Basin Index (%) 0* 73
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .1 0* 8.0 13.6 59
North Rapid Creek 6130 -M .4 * 10.5 10.8 97
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Basin Index (%) 0* 76
UPPER N. PLATTE
Arapaho Ridge 10976 22.1 22.4 99 24.8 25.2 98
Blackhall Mtn 9839 36.2 31.6 115 39.4 35.8 110
Cinnabar Park 9707 19.1 18.8 102 26.6 27.5 97
Columbine 9167 15.8 17.6 90 28.9 29.2 99
Divide Peak 8730 15.5 15.3 101 27.1 25.0 108
Joe Wright 10158 23.0 22.8 101 30.1 30.6 98
Laprele Creek 8390 2.0 6.0 33 13.2 14.9 89
Med Bow 10512 43.4 -M * 38.1 -M *
Never Summer 10323 24.1 22.4 108 19.5 20.0 98
North French Creek 10153 30.4 32.7 93 32.1 32.9 98
Old Battle 9860 34.5 35.2 98 37.6 38.8 97
Rawah 9069 10.8 6.4 169 20.4 19.4 105
Sage Creek Basin 7850 .7 .3 233* 17.3 14.7 118
Sand Lake 10098 34.8 32.0 109 34.2 29.3 117
South Brush Creek 8495 6.3 6.5 97 15.2 16.8 90
Tower 10620 44.5 47.2 94 44.6 45.2 99
Webber Springs 9260 20.8 21.2 98 29.1 29.6 98
Whiskey Park 9020 28.4 26.8 106 33.2 33.2 100
Willow Creek Pass 9523 15.8 15.2 104 17.8 16.6 107
Zirkel 9338 17.9 22.4 80 32.4 35.1 92
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Basin Index (%) 100 101
SWEETWATER
Deer Park 9700 17.3 15.1 115 23.6 21.8 108
Larsen Creek 9000 .0 3.6 0 15.4 16.1 96
South Pass 9040 14.0 14.7 95 20.0 18.2 110
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Basin Index (%) 94 105
LOWER N. PLATTE
Casper Mtn. 7920 7.0 12.2 57 16.5 17.8 93
Laprele Creek 8390 2.0 6.0 33 13.2 14.9 89
Reno Hill 8430 7.8 13.8 57 16.3 18.8 87
Windy Peak 7915 4.2 3.7 114 12.3 13.2 93
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Basin Index (%) 59 90
LARAMIE RIVER
Brooklyn Lake 10250 23.8 23.2 103 29.8 25.2 118
Cinnabar Park 9707 19.1 18.8 102 26.6 27.5 97
Crow Creek 8335 .0 .4 0* 12.7 13.2 96
Deadman Hill 10239 22.9 19.9 115 22.6 21.2 107
Rawah 9069 10.8 6.4 169 20.4 19.4 105
Roach 9740 13.5 16.4 82 20.2 21.6 94
Windy Peak 7915 4.2 3.7 114 12.3 13.2 93
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Basin Index (%) 106 102
S. PLATTE
Crow Creek 8335 .0 .4 0* 12.7 13.2 96
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Basin Index (%) 0* 96
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 20.7 17.6 118
Divide Peak 8730 15.5 15.3 101 27.1 25.0 108
Elk River 8739 8.9 12.6 71 22.5 23.0 98
Elkhead Divide 8800 16.7 -M * 26.4 -M *
Little Snake River 8928 24.4 24.4 100 37.1 36.9 101
Old Battle 9860 34.5 35.2 98 37.6 38.8 97
Sage Creek Basin 7850 .7 .3 233* 17.3 14.7 118
Sandstone RS 8152 6.8 5.6 121 20.6 20.1 102
Whiskey Park 9020 28.4 26.8 106 33.2 33.2 100
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Basin Index (%) 99 103
UPPER GREEN RIVER
Big Sandy Opening 9080 10.0 11.1 90 15.8 15.0 105
Blind Bull Sum 8650 25.7 24.6 104 18.4 19.4 95
East Rim Divide 7930 -M 5.9 * 12.6 12.6 100
Elkhart Park G.S. 9400 7.6 10.9 70 13.5 13.8 98
Gros Ventre Summit 8750 9.3 11.7 79 -M 14.7 *
Gunsight Pass 9820 11.7 13.0 90 16.3 16.2 101
Indian Creek 9425 22.7 22.0 103 22.6 21.4 106
Kendall R.S. 7740 .1 4.2 2 14.1 14.6 97
Larsen Creek 9000 .0 3.6 0 15.4 16.1 96
Loomis Park 8240 5.9 11.5 51 16.5 18.6 89
New Fork Lake 8340 .5 5.6 9 -M 12.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.0 6.8 59 14.9 15.2 98
Spring Creek Divide 9000 23.9 25.2 95 24.3 25.4 96
Triple Peak 8500 17.9 19.1 94 27.4 28.4 96
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Basin Index (%) 82 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.1 3.6 31 15.2 14.2 107
Buck Pasture 9632 10.5 -M * 18.5 -M *
EF Blacks Fork GS 9360 4.0 7.8 51 11.2 13.6 82
Hams Fork 7840 -M 1.9 * 13.1 12.0 109
Henrys Fork 10182 -M -M * 14.7 -M *
Hewinta 9500 4.5 5.2 87 16.2 15.9 102
Hickerson Park 9122 .8 3.4 24 14.8 12.2 121
Hole-in-Rock 9168 .5 2.2 23 12.0 12.0 100
Indian Creek 9425 22.7 22.0 103 22.6 21.4 106
Kelley R.S. 8180 11.3 10.9 104 19.8 18.0 110
Spirit Lk 10235 10.6 12.5 85 20.2 19.9 102
Steel Creek Park 10158 15.1 17.6 86 19.6 19.0 103
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Basin Index (%) 83 104
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 15.4 13.8 112
Bug Lake 7987 14.8 13.9 106 25.1 19.4 129
Burts Miller Ranch 8000 .0 .0 * 12.8 8.7 147
Chalk Creek #1 9171 19.9 21.8 91 27.7 25.8 107
Giveout 6930 -M .0 * 14.3 13.8 104
Hayden Fork 9130 5.1 8.6 59 24.8 23.2 107
Kelley R.S. 8180 11.3 10.9 104 19.8 18.0 110
Lily Lake 9133 8.2 10.3 80 17.1 18.2 94
Monte Cristo 8932 26.4 23.9 110 31.8 28.1 113
Salt River Summit 7640 7.1 7.9 90 15.5 17.8 87
Spring Creek Divide 9000 23.9 25.2 95 24.3 25.4 96
Trial Lake 9992 26.3 22.4 117 29.2 24.8 118
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Basin Index (%) 99 109
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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.
