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 MONDAY: MARCH 13 , 2023
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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 15.5 15.7 99 17.3 17.8 97
Blind Bull Sum 8650 21.2 20.8 102 14.6 15.9 92
Cottonwood Creek 7670 21.3 19.0 112 22.3 21.5 104
East Rim Divide 7930 10.4 9.7 107 9.9 10.0 99
Grand Targhee 9260 37.3 34.8 107 22.3 27.0 83
Granite Creek 6770 -M 15.2 * -M 16.6 *
Grassy Lake 7265 29.7 27.8 107 33.1 30.6 108
Gros Ventre Summit 8750 9.9 10.7 93 9.2 10.4 88
Gunsight Pass 9820 11.2 11.4 98 10.7 11.9 90
Lewis Lake Divide 7850 30.5 26.5 115 30.5 28.2 108
Loomis Park 8240 13.7 13.5 101 13.8 14.6 95
Phillips Bench 8200 25.6 22.2 115 25.2 23.3 108
Salt River Summit 7640 16.8 11.6 145 16.1 13.4 120
Snake River Station 6920 17.2 15.4 112 19.8 19.1 104
Somsen Ranch 6800 16.9 11.7 144 18.0 14.4 125
Spring Creek Divide 9000 23.1 21.0 110 16.5 20.8 79
Thumb Divide 7980 17.5 14.0 125 16.3 14.9 109
Togwotee Pass 9580 19.3 21.0 92 17.9 22.1 81
Triple Peak 8500 21.3 21.1 101 21.8 22.4 97
Two Ocean Plateau 9240 26.5 24.8 107 20.8 23.0 90
Willow Creek 8080 30.8 26.2 118 29.7 28.3 105
Younts Peak 8350 14.5 13.1 111 11.8 12.8 92
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Basin Index (%) 110 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 37.4 32.7 114 35.2 32.1 110
Canyon 7870 12.7 -M * 14.8 -M *
Madison Plateau 7750 24.9 19.4 128 24.8 21.6 115
West Yellowstone 6700 14.3 10.0 143 16.8 12.7 132
Whiskey Creek 6800 17.9 14.0 128 22.3 17.2 130
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Basin Index (%) 124 119
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.1 19.2 84 15.0 17.6 85
Canyon 7870 12.7 -M * 14.8 -M *
Evening Star 9200 23.0 22.6 102 24.8 24.8 100
Fisher Creek 9100 29.8 28.2 106 30.2 27.7 109
Monument Peak 8850 18.4 18.2 101 20.5 18.2 113
Northeast Entrance 7350 9.1 9.3 98 11.2 11.6 97
Parker Peak 9400 20.2 18.5 109 20.0 17.5 114
Sylvan Lake 8420 17.0 17.1 99 20.1 19.4 104
Thumb Divide 7980 17.5 14.0 125 16.3 14.9 109
Two Ocean Plateau 9240 26.5 24.8 107 20.8 23.0 90
White Mill 8700 21.7 20.9 104 20.5 20.2 101
Wolverine 7650 12.3 10.8 114 11.4 11.0 104
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Basin Index (%) 104 102
WIND RIVER
Burroughs Creek 8750 9.4 -M * 9.4 -M *
Castle Creek 8400 5.2 6.9 75 5.8 7.5 77
Cold Springs 9630 7.0 6.3 111 8.5 7.4 115
Deer Park 9700 20.5 11.4 180 20.8 14.4 144
Hobbs Park 10100 13.0 11.4 114 12.1 10.1 120
Kirwin 9550 8.7 9.2 95 10.8 10.0 108
Little Warm 9370 8.8 8.9 99 10.0 10.3 97
South Pass 9040 16.7 12.5 134 15.7 12.6 125
St. Lawrence Alt 8620 5.8 -M * 8.0 -M *
Togwotee Pass 9580 19.3 21.0 92 17.9 22.1 81
Townsend Creek 8700 10.0 7.6 132 10.8 8.6 126
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 16.0 16.0 100 13.0 13.5 96
Bear Trap Meadow 8200 7.7 5.7 135 7.8 6.7 116
Bone Springs Div 9350 12.6 13.8 91 10.2 12.8 80
Grave Springs 8550 8.7 7.4 118 9.1 7.8 117
Kirwin 9550 8.7 9.2 95 10.8 10.0 108
Marquette 8760 6.2 5.8 107 6.9 7.2 96
Middle Powder 7760 9.6 8.8 109 8.3 8.4 99
Owl Creek 8975 5.9 4.6 128 6.4 5.0 128
Powder River Pass 9480 9.7 9.2 105 11.7 10.4 112
Shell Creek 9580 11.7 12.6 93 12.0 11.4 105
Timber Creek 7950 4.4 4.3 102 5.0 6.2 81
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Basin Index (%) 104 102
SHOSHONE RIVER
Blackwater 9780 17.6 19.6 90 17.8 18.6 96
Evening Star 9200 23.0 22.6 102 24.8 24.8 100
Marquette 8760 6.2 5.8 107 6.9 7.2 96
Sylvan Lake 8420 17.0 17.1 99 20.1 19.4 104
Sylvan Road 7120 9.8 10.4 94 13.2 14.6 90
Younts Peak 8350 14.5 13.1 111 11.8 12.8 92
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Basin Index (%) 99 97
POWDER RIVER
Bear Trap Meadow 8200 7.7 5.7 135 7.8 6.7 116
Cloud Peak Reservoir 9860 12.2 12.4 98 11.8 11.0 107
Grave Springs 8550 8.7 7.4 118 9.1 7.8 117
Hansen Sawmill 8360 7.0 5.8 121 7.4 7.0 106
Middle Powder 7760 9.6 8.8 109 8.3 8.4 99
Powder River Pass 9480 9.7 9.2 105 11.7 10.4 112
Soldier Park 8720 7.0 5.8 121 6.6 7.7 86
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Basin Index (%) 112 106
TONGUE RIVER
Big Goose 7990 8.5 6.7 127 9.2 8.2 112
Bone Springs Div 9350 12.6 13.8 91 10.2 12.8 80
Burgess Junction 7880 10.7 9.1 118 12.0 9.9 121
Dome Lake 8880 9.6 9.6 100 10.0 10.1 99
Little Goose 8870 9.2 7.8 118 10.1 9.8 103
Sucker Creek 8880 11.7 10.4 112 14.0 11.6 121
Tie Creek 6870 8.0 4.9 163 11.2 8.9 126
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Basin Index (%) 113 108
BELLE FOURCHE
Blind Park 6890 8.3 7.0 119 9.6 9.3 103
Cole Canyon 5910 7.8 5.1 153 9.1 7.4 123
North Rapid Creek 6130 7.1 6.2 115 7.7 7.6 101
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Basin Index (%) 127 109
CHEYENNE RIVER BASIN
Blind Park 6890 8.3 7.0 119 9.6 9.3 103
North Rapid Creek 6130 7.1 6.2 115 7.7 7.6 101
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Basin Index (%) 117 102
UPPER N. PLATTE
Arapaho Ridge 10976 21.1 18.3 115 20.2 18.4 110
Blackhall Mtn 9839 33.0 24.0 138 32.4 23.6 137
Cinnabar Park 9707 -M 18.4 * 20.8 20.8 100
Columbine 9167 24.8 20.7 120 22.8 20.8 110
Divide Peak 8730 24.7 16.9 146 23.3 18.2 128
Joe Wright 10158 20.5 18.0 114 22.5 22.2 101
Laprele Creek 8390 10.7 8.3 129 11.2 9.6 117
Med Bow 10512 35.1 -M * 30.3 -M *
Never Summer 10323 -M 17.2 * -M 14.5 *
North French Creek 10153 26.8 24.0 112 26.3 22.2 118
Old Battle 9860 35.2 26.0 135 30.5 28.4 107
Rawah 9069 12.4 9.6 129 14.0 13.2 106
Sage Creek Basin 7850 22.5 12.6 179 18.7 11.1 168
Sand Lake 10098 -M 22.4 * -M 20.5 *
South Brush Creek 8495 13.8 10.3 134 12.8 11.5 111
Tower 10620 43.9 37.8 116 38.7 34.4 112
Webber Springs 9260 25.7 18.8 137 27.4 21.2 129
Whiskey Park 9020 34.7 23.8 146 31.4 23.8 132
Willow Creek Pass 9523 14.3 11.0 130 14.3 11.6 123
Zirkel 9338 28.4 25.0 114 30.1 26.5 114
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Basin Index (%) 129 118
SWEETWATER
Deer Park 9700 20.5 11.4 180 20.8 14.4 144
Larsen Creek 9000 10.0 10.2 98 12.8 11.1 115
South Pass 9040 16.7 12.5 134 15.7 12.6 125
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Basin Index (%) 138 129
LOWER N. PLATTE
Casper Mtn. 7920 11.9 11.0 108 11.8 11.1 106
Laprele Creek 8390 10.7 8.3 129 11.2 9.6 117
Reno Hill 8430 13.2 11.4 116 14.4 11.9 121
Windy Peak 7915 9.9 6.7 148 10.6 8.1 131
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Basin Index (%) 122 118
LARAMIE RIVER
Brooklyn Lake 10250 22.5 17.2 131 22.6 18.2 124
Cinnabar Park 9707 -M 18.4 * 20.8 20.8 100
Crow Creek 8335 4.9 6.3 78 7.7 8.3 93
Deadman Hill 10239 16.7 14.2 118 15.4 14.4 107
Rawah 9069 12.4 9.6 129 14.0 13.2 106
Roach 9740 16.2 13.2 123 18.1 15.6 116
Windy Peak 7915 9.9 6.7 148 10.6 8.1 131
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Basin Index (%) 123 111
S. PLATTE
Crow Creek 8335 4.9 6.3 78 7.7 8.3 93
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Basin Index (%) 78 93
LITTLE SNAKE RIVER
Battle Mountain 7498 15.9 10.6 150 19.8 13.0 152
Divide Peak 8730 24.7 16.9 146 23.3 18.2 128
Elk River 8739 24.7 16.7 148 23.5 16.2 145
Elkhead Divide 8800 27.0 -M * 26.2 -M *
Little Snake River 8928 33.2 23.2 143 35.9 27.6 130
Old Battle 9860 35.2 26.0 135 30.5 28.4 107
Sage Creek Basin 7850 22.5 12.6 179 18.7 11.1 168
Sandstone RS 8152 21.1 11.8 179 21.9 15.8 139
Whiskey Park 9020 34.7 23.8 146 31.4 23.8 132
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Basin Index (%) 150 133
UPPER GREEN RIVER
Big Sandy Opening 9080 13.2 11.0 120 13.3 10.6 125
Blind Bull Sum 8650 21.2 20.8 102 14.6 15.9 92
East Rim Divide 7930 10.4 9.7 107 9.9 10.0 99
Elkhart Park G.S. 9400 10.4 10.5 99 9.7 10.8 90
Gros Ventre Summit 8750 9.9 10.7 93 9.2 10.4 88
Gunsight Pass 9820 11.2 11.4 98 10.7 11.9 90
Indian Creek 9425 23.8 20.2 118 20.5 17.1 120
Kendall R.S. 7740 10.7 10.8 99 11.0 11.7 94
Larsen Creek 9000 10.0 10.2 98 12.8 11.1 115
Loomis Park 8240 13.7 13.5 101 13.8 14.6 95
New Fork Lake 8340 9.7 9.3 104 -M 9.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 12.7 11.5 110 13.7 12.4 110
Spring Creek Divide 9000 23.1 21.0 110 16.5 20.8 79
Triple Peak 8500 21.3 21.1 101 21.8 22.4 97
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Basin Index (%) 105 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 11.7 7.4 158 12.4 10.2 122
Buck Pasture 9632 17.4 -M * 18.4 -M *
EF Blacks Fork GS 9360 12.4 10.0 124 9.8 9.6 102
Hams Fork 7840 13.4 10.2 131 12.2 9.4 130
Henrys Fork 10182 -M -M * 13.0 -M *
Hewinta 9500 11.0 8.8 125 13.8 11.0 125
Hickerson Park 9122 9.2 6.6 139 9.8 8.6 114
Hole-in-Rock 9168 8.1 6.2 131 9.3 8.3 112
Indian Creek 9425 23.8 20.2 118 20.5 17.1 120
Kelley R.S. 8180 17.7 12.8 138 18.2 14.2 128
Spirit Lk 10235 17.2 9.9 174 16.3 13.8 118
Steel Creek Park 10158 17.1 12.5 137 16.8 13.0 129
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Basin Index (%) 135 121
UPPER BEAR RIVER
Bear River RS 8777 12.5 8.0 156 13.7 9.7 141
Bug Lake 7987 24.7 16.3 152 20.1 15.2 132
Burts Miller Ranch 8000 8.8 5.5 160 12.2 6.4 191
Chalk Creek #1 9171 26.9 19.7 137 24.4 19.6 124
Giveout 6930 12.9 8.2 157 13.2 10.2 129
Hayden Fork 9130 18.5 13.0 142 22.8 17.4 131
Kelley R.S. 8180 17.7 12.8 138 18.2 14.2 128
Lily Lake 9133 13.4 11.0 122 14.9 13.4 111
Monte Cristo 8932 33.0 22.9 144 28.9 21.7 133
Salt River Summit 7640 16.8 11.6 145 16.1 13.4 120
Spring Creek Divide 9000 23.1 21.0 110 16.5 20.8 79
Trial Lake 9992 30.2 19.2 157 29.4 18.8 156
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Basin Index (%) 141 127
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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.
