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 THURSDAY: MAY 9 , 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 7.7 6.2 124 23.5 23.6 100
Blind Bull Sum 8650 27.1 24.0 113 19.5 19.8 98
Cottonwood Creek 7670 14.9 15.2 98 30.5 29.0 105
East Rim Divide 7930 .0 2.2 0 13.3 13.1 102
Grand Targhee 9260 45.6 47.0 97 35.2 36.7 96
Granite Creek 6770 7.0 6.0 117 19.2 21.3 90
Grassy Lake 7265 22.8 23.4 97 38.2 39.2 97
Gros Ventre Summit 8750 9.1 10.2 89 -M 14.9 *
Gunsight Pass 9820 12.6 12.6 100 17.6 17.0 104
Lewis Lake Divide 7850 26.9 29.4 91 38.8 37.9 102
Loomis Park 8240 6.3 8.0 79 18.0 19.4 93
Phillips Bench 8200 25.7 24.2 106 33.4 29.1 115
Salt River Summit 7640 6.6 5.0 132 16.3 18.6 88
Snake River Station 6920 6.4 3.8 168 25.0 25.4 98
Somsen Ranch 6800 5.4 .0 * 23.6 18.8 126
Spring Creek Divide 9000 25.1 24.0 105 25.9 26.6 97
Thumb Divide 7980 12.3 8.8 140 20.5 22.1 93
Togwotee Pass 9580 22.6 25.8 88 24.3 28.4 86
Triple Peak 8500 19.3 17.2 112 29.8 29.4 101
Two Ocean Plateau 9240 32.1 33.0 97 30.3 30.4 100
Willow Creek 8080 28.1 24.3 116 40.2 38.8 104
Younts Peak 8350 10.1 12.9 78 17.9 17.6 102
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Basin Index (%) 103 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.0 41.0 83 41.6 41.6 100
Canyon 7870 8.7 -M * 15.7 -M *
Madison Plateau 7750 18.4 22.4 82 25.8 28.8 90
West Yellowstone 6700 .0 .0 * 15.0 16.2 93
Whiskey Creek 6800 9.1 11.0 83 21.7 22.8 95
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Basin Index (%) 83 95
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.6 24.8 83 20.5 24.2 85
Canyon 7870 8.7 -M * 15.7 -M *
Evening Star 9200 21.5 26.9 80 30.7 32.6 94
Fisher Creek 9100 26.0 35.8 73 31.3 38.4 82
Monument Peak 8850 17.2 21.5 80 23.4 26.4 89
Northeast Entrance 7350 .8 .0 * 13.7 15.0 91
Parker Peak 9400 23.0 24.1 95 26.6 23.3 114
Sylvan Lake 8420 13.2 18.2 73 26.8 27.4 98
Thumb Divide 7980 12.3 8.8 140 20.5 22.1 93
Two Ocean Plateau 9240 32.1 33.0 97 30.3 30.4 100
White Mill 8700 20.2 26.6 76 21.8 26.1 84
Wolverine 7650 .7 .4 175* 16.0 14.3 112
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Basin Index (%) 85 93
WIND RIVER
Burroughs Creek 8750 7.0 -M * 13.9 -M *
Castle Creek 8400 .3 .0 * 10.0 10.7 93
Cold Springs 9630 3.8 1.7 224 14.6 12.0 122
Deer Park 9700 19.0 13.8 138 25.3 22.6 112
Hobbs Park 10100 19.8 15.7 126 22.0 17.4 126
Kirwin 9550 14.7 11.4 129 19.3 15.4 125
Little Warm 9370 9.4 7.8 121 17.2 14.4 119
South Pass 9040 14.9 12.4 120 21.7 19.2 113
St. Lawrence Alt 8620 .4 -M * 13.9 -M *
Togwotee Pass 9580 22.6 25.8 88 24.3 28.4 86
Townsend Creek 8700 9.0 6.2 145 17.5 14.6 120
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Basin Index (%) 120 111
BIGHORN BASIN
Bald Mtn. 9380 19.5 20.9 93 17.8 19.6 91
Bear Trap Meadow 8200 1.8 .2 900* 12.1 11.7 103
Bone Springs Div 9350 18.2 17.4 105 16.2 18.8 86
Grave Springs 8550 5.6 6.5 86 12.9 12.6 102
Kirwin 9550 14.7 11.4 129 19.3 15.4 125
Marquette 8760 17.2 7.2 239 21.7 13.0 167
Middle Powder 7760 13.7 9.2 149 13.8 13.0 106
Owl Creek 8975 .4 .9 44 11.7 8.8 133
Powder River Pass 9480 6.0 9.1 66 15.8 16.4 96
Shell Creek 9580 17.6 16.9 104 18.5 17.2 108
Timber Creek 7950 4.8 1.4 343 16.4 11.0 149
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Basin Index (%) 118 112
SHOSHONE RIVER
Blackwater 9780 25.4 25.9 98 27.6 26.6 104
Evening Star 9200 21.5 26.9 80 30.7 32.6 94
Marquette 8760 17.2 7.2 239 21.7 13.0 167
Sylvan Lake 8420 13.2 18.2 73 26.8 27.4 98
Sylvan Road 7120 .0 .0 * 17.2 19.0 91
Younts Peak 8350 10.1 12.9 78 17.9 17.6 102
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Basin Index (%) 96 104
POWDER RIVER
Bear Trap Meadow 8200 1.8 .2 900* 12.1 11.7 103
Cloud Peak Reservoir 9860 16.1 16.2 99 20.7 18.2 114
Grave Springs 8550 5.6 6.5 86 12.9 12.6 102
Hansen Sawmill 8360 2.2 2.0 110 13.3 12.0 111
Middle Powder 7760 13.7 9.2 149 13.8 13.0 106
Powder River Pass 9480 6.0 9.1 66 15.8 16.4 96
Soldier Park 8720 1.8 .9 200 13.7 11.9 115
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Basin Index (%) 107 107
TONGUE RIVER
Big Goose 7990 8.5 8.6 99 16.4 14.4 114
Bone Springs Div 9350 18.2 17.4 105 16.2 18.8 86
Burgess Junction 7880 11.0 11.0 100 16.9 15.6 108
Dome Lake 8880 11.2 11.1 101 17.6 17.5 101
Little Goose 8870 12.0 9.6 125 19.4 16.2 120
Sucker Creek 8880 12.2 12.4 98 21.1 18.8 112
Tie Creek 6870 1.9 1.0 190 16.3 15.0 109
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Basin Index (%) 105 107
BELLE FOURCHE
Blind Park 6890 2.2 .0 * 11.7 14.0 84
Cole Canyon 5910 2.2 .0 * 11.8 13.2 89
North Rapid Creek 6130 .0 .0 * 11.7 11.8 99
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Basin Index (%) * 90
CHEYENNE RIVER BASIN
Blind Park 6890 2.2 .0 * 11.7 14.0 84
North Rapid Creek 6130 .0 .0 * 11.7 11.8 99
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Basin Index (%) * 91
UPPER N. PLATTE
Arapaho Ridge 10976 23.8 22.4 106 27.2 26.2 104
Blackhall Mtn 9839 38.0 32.9 116 41.7 37.0 113
Cinnabar Park 9707 18.9 17.4 109 27.5 27.8 99
Columbine 9167 14.9 13.6 110 30.7 30.0 102
Divide Peak 8730 16.8 13.0 129 29.4 25.4 116
Joe Wright 10158 23.4 22.4 104 31.4 32.0 98
Laprele Creek 8390 3.6 2.4 150 15.5 15.5 100
Med Bow 10512 45.0 -M * 40.0 -M *
Never Summer 10323 25.1 22.2 113 20.4 20.8 98
North French Creek 10153 31.2 31.8 98 33.7 34.2 99
Old Battle 9860 36.4 36.0 101 39.9 40.0 100
Rawah 9069 10.0 4.0 250 20.8 20.1 103
Sage Creek Basin 7850 1.1 .0 * 18.9 15.6 121
Sand Lake 10098 36.6 32.2 114 36.3 31.4 116
South Brush Creek 8495 5.8 2.0 290 15.9 17.6 90
Tower 10620 47.4 48.0 99 47.8 46.6 103
Webber Springs 9260 21.4 19.0 113 30.5 30.8 99
Whiskey Park 9020 28.9 27.3 106 35.2 34.6 102
Willow Creek Pass 9523 16.2 14.6 111 18.7 16.8 111
Zirkel 9338 17.5 20.3 86 34.4 35.4 97
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Basin Index (%) 109 103
SWEETWATER
Deer Park 9700 19.0 13.8 138 25.3 22.6 112
Larsen Creek 9000 .0 .0 * 16.4 16.4 100
South Pass 9040 14.9 12.4 120 21.7 19.2 113
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Basin Index (%) 129 109
LOWER N. PLATTE
Casper Mtn. 7920 9.9 10.2 97 20.2 18.2 111
Laprele Creek 8390 3.6 2.4 150 15.5 15.5 100
Reno Hill 8430 10.5 12.4 85 20.1 21.1 95
Windy Peak 7915 5.0 1.2 417 14.2 14.0 101
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Basin Index (%) 111 102
LARAMIE RIVER
Brooklyn Lake 10250 24.2 21.5 113 31.2 26.6 117
Cinnabar Park 9707 18.9 17.4 109 27.5 27.8 99
Crow Creek 8335 .0 .0 * 12.9 13.7 94
Deadman Hill 10239 23.1 19.4 119 23.4 22.3 105
Rawah 9069 10.0 4.0 250 20.8 20.1 103
Roach 9740 13.5 15.8 85 21.5 22.5 96
Windy Peak 7915 5.0 1.2 417 14.2 14.0 101
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Basin Index (%) 119 103
S. PLATTE
Crow Creek 8335 .0 .0 * 12.9 13.7 94
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Basin Index (%) * 94
LITTLE SNAKE RIVER
Battle Mountain 7498 .7 .0 * 22.1 18.0 123
Divide Peak 8730 16.8 13.0 129 29.4 25.4 116
Elk River 8739 7.7 7.9 97 23.5 23.2 101
Elkhead Divide 8800 16.4 -M * 27.9 -M *
Little Snake River 8928 25.4 21.1 120 39.5 37.8 104
Old Battle 9860 36.4 36.0 101 39.9 40.0 100
Sage Creek Basin 7850 1.1 .0 * 18.9 15.6 121
Sandstone RS 8152 6.9 2.5 276 21.8 20.4 107
Whiskey Park 9020 28.9 27.3 106 35.2 34.6 102
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Basin Index (%) 115 107
UPPER GREEN RIVER
Big Sandy Opening 9080 10.9 9.6 114 17.2 15.5 111
Blind Bull Sum 8650 27.1 24.0 113 19.5 19.8 98
East Rim Divide 7930 .0 2.2 0 13.3 13.1 102
Elkhart Park G.S. 9400 8.4 9.8 86 14.4 14.8 97
Gros Ventre Summit 8750 9.1 10.2 89 -M 14.9 *
Gunsight Pass 9820 12.6 12.6 100 17.6 17.0 104
Indian Creek 9425 23.4 21.0 111 23.6 22.4 105
Kendall R.S. 7740 .0 .0 * 15.3 15.1 101
Larsen Creek 9000 .0 .0 * 16.4 16.4 100
Loomis Park 8240 6.3 8.0 79 18.0 19.4 93
New Fork Lake 8340 1.2 3.1 39 -M 12.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.5 4.9 71 16.0 15.7 102
Spring Creek Divide 9000 25.1 24.0 105 25.9 26.6 97
Triple Peak 8500 19.3 17.2 112 29.8 29.4 101
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Basin Index (%) 100 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.8 .1 1800* 16.6 14.8 112
Buck Pasture 9632 12.1 -M * 20.5 -M *
EF Blacks Fork GS 9360 4.7 4.8 98 13.0 14.3 91
Hams Fork 7840 -M .1 * 13.6 13.2 103
Henrys Fork 10182 -M -M * 16.4 -M *
Hewinta 9500 5.1 2.4 212 17.9 16.4 109
Hickerson Park 9122 .3 .3 100* 15.9 12.8 124
Hole-in-Rock 9168 .0 .2 0* 13.0 12.7 102
Indian Creek 9425 23.4 21.0 111 23.6 22.4 105
Kelley R.S. 8180 11.1 8.4 132 20.7 18.9 110
Spirit Lk 10235 10.0 10.7 93 21.6 20.0 108
Steel Creek Park 10158 17.1 17.2 99 21.7 19.8 110
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Basin Index (%) 113 107
UPPER BEAR RIVER
Bear River RS 8777 .8 .0 * 17.0 14.1 121
Bug Lake 7987 15.2 11.8 129 26.2 19.6 134
Burts Miller Ranch 8000 .6 .0 * 13.9 8.8 158
Chalk Creek #1 9171 20.5 20.3 101 29.3 26.8 109
Giveout 6930 .0 .0 * 14.7 14.6 101
Hayden Fork 9130 6.2 4.8 129 27.3 24.0 114
Kelley R.S. 8180 11.1 8.4 132 20.7 18.9 110
Lily Lake 9133 9.1 6.5 140 18.9 19.0 99
Monte Cristo 8932 28.3 20.8 136 33.8 28.4 119
Salt River Summit 7640 6.6 5.0 132 16.3 18.6 88
Spring Creek Divide 9000 25.1 24.0 105 25.9 26.6 97
Trial Lake 9992 28.3 21.0 135 31.2 25.8 121
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Basin Index (%) 124 112
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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.