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: APRIL 17 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 19.0 15.4 123 21.8 21.2 103
Blind Bull Sum 8650 27.0 25.0 108 19.5 18.2 107
Cottonwood Creek 7670 25.2 20.3 124 28.8 26.2 110
East Rim Divide 7930 11.6 9.7 120 12.2 11.6 105
Grand Targhee 9260 47.6 46.8 102 30.5 33.9 90
Granite Creek 6770 18.8 12.8 147 16.1 19.4 83
Grassy Lake 7265 36.5 32.6 112 40.6 36.9 110
Gros Ventre Summit 8750 12.9 13.2 98 11.7 13.2 89
Gunsight Pass 9820 13.9 13.4 104 13.6 14.6 93
Lewis Lake Divide 7850 38.3 32.6 117 41.3 34.6 119
Loomis Park 8240 17.1 14.4 119 17.3 17.2 101
Phillips Bench 8200 30.4 26.5 115 31.3 27.4 114
Salt River Summit 7640 21.2 11.3 188 20.9 16.8 124
Snake River Station 6920 19.1 15.2 126 23.7 23.2 102
Somsen Ranch 6800 -M 8.6 * -M 17.4 *
Spring Creek Divide 9000 29.4 25.2 117 -M 24.4 *
Thumb Divide 7980 20.8 16.2 128 20.2 19.1 106
Togwotee Pass 9580 23.0 24.6 93 21.9 25.6 86
Triple Peak 8500 26.2 22.0 119 27.1 26.0 104
Two Ocean Plateau 9240 33.8 32.0 106 28.5 28.2 101
Willow Creek 8080 39.9 28.3 141 37.2 34.5 108
Younts Peak 8350 16.2 15.0 108 14.0 15.9 88
----- -----
Basin Index (%) 117 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 42.8 39.6 108 44.9 38.4 117
Canyon 7870 14.9 -M * 18.1 -M *
Madison Plateau 7750 31.4 23.4 134 30.8 25.4 121
West Yellowstone 6700 15.4 7.2 214 19.8 14.8 134
Whiskey Creek 6800 21.8 15.8 138 27.2 20.8 131
----- -----
Basin Index (%) 130 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.7 23.2 89 19.4 21.6 90
Canyon 7870 14.9 -M * 18.1 -M *
Evening Star 9200 27.6 26.4 105 29.9 29.6 101
Fisher Creek 9100 35.4 35.4 100 36.7 35.2 104
Monument Peak 8850 23.2 22.0 105 25.6 23.2 110
Northeast Entrance 7350 9.2 7.6 121 13.2 13.6 97
Parker Peak 9400 27.0 22.8 118 25.6 21.0 122
Sylvan Lake 8420 20.8 20.4 102 25.1 24.5 102
Thumb Divide 7980 20.8 16.2 128 20.2 19.1 106
Two Ocean Plateau 9240 33.8 32.0 106 28.5 28.2 101
White Mill 8700 25.8 25.2 102 24.5 23.5 104
Wolverine 7650 12.7 8.5 149 13.4 12.8 105
----- -----
Basin Index (%) 107 104
WIND RIVER
Burroughs Creek 8750 10.4 -M * 11.3 -M *
Castle Creek 8400 5.0 5.6 89 7.4 9.0 82
Cold Springs 9630 7.6 6.8 112 10.8 9.8 110
Deer Park 9700 24.5 16.0 153 25.6 19.9 129
Hobbs Park 10100 17.0 15.6 109 16.5 14.4 115
Kirwin 9550 10.3 11.8 87 13.7 13.0 105
Little Warm 9370 11.0 10.4 106 13.6 12.4 110
South Pass 9040 19.8 15.8 125 20.8 16.8 124
St. Lawrence Alt 8620 7.1 -M * 11.4 -M *
Togwotee Pass 9580 23.0 24.6 93 21.9 25.6 86
Townsend Creek 8700 12.4 9.9 125 14.5 12.8 113
----- -----
Basin Index (%) 112 108
BIGHORN BASIN
Bald Mtn. 9380 19.2 20.0 96 16.0 16.9 95
Bear Trap Meadow 8200 8.4 4.4 191 10.4 9.6 108
Bone Springs Div 9350 16.3 18.1 90 12.9 16.8 77
Grave Springs 8550 9.8 8.4 117 12.0 10.7 112
Kirwin 9550 10.3 11.8 87 13.7 13.0 105
Marquette 8760 8.9 7.8 114 11.1 10.6 105
Middle Powder 7760 12.2 11.4 107 10.9 10.5 104
Owl Creek 8975 7.3 4.8 152 9.6 6.8 141
Powder River Pass 9480 10.1 10.3 98 14.1 14.0 101
Shell Creek 9580 14.0 16.4 85 14.6 14.6 100
Timber Creek 7950 5.9 5.2 113 8.3 8.8 94
----- -----
Basin Index (%) 103 101
SHOSHONE RIVER
Blackwater 9780 23.0 24.8 93 23.5 23.5 100
Evening Star 9200 27.6 26.4 105 29.9 29.6 101
Marquette 8760 8.9 7.8 114 11.1 10.6 105
Sylvan Lake 8420 20.8 20.4 102 25.1 24.5 102
Sylvan Road 7120 8.9 10.2 87 15.5 17.2 90
Younts Peak 8350 16.2 15.0 108 14.0 15.9 88
----- -----
Basin Index (%) 101 98
POWDER RIVER
Bear Trap Meadow 8200 8.4 4.4 191 10.4 9.6 108
Cloud Peak Reservoir 9860 15.5 15.2 102 15.6 14.8 105
Grave Springs 8550 9.8 8.4 117 12.0 10.7 112
Hansen Sawmill 8360 7.7 6.0 128 9.9 9.4 105
Middle Powder 7760 12.2 11.4 107 10.9 10.5 104
Powder River Pass 9480 10.1 10.3 98 14.1 14.0 101
Soldier Park 8720 7.9 6.8 116 9.6 10.4 92
----- -----
Basin Index (%) 115 104
TONGUE RIVER
Big Goose 7990 10.3 8.8 117 11.5 10.8 106
Bone Springs Div 9350 16.3 18.1 90 12.9 16.8 77
Burgess Junction 7880 12.4 11.6 107 14.4 13.2 109
Dome Lake 8880 11.3 12.2 93 12.8 14.0 91
Little Goose 8870 10.4 10.5 99 12.8 13.6 94
Sucker Creek 8880 13.4 12.8 105 17.3 14.9 116
Tie Creek 6870 8.6 4.5 191 13.8 12.0 115
----- -----
Basin Index (%) 105 100
BELLE FOURCHE
Blind Park 6890 6.1 4.5 136 11.8 11.9 99
Cole Canyon 5910 6.7 3.1 216 11.1 9.6 116
North Rapid Creek 6130 5.9 4.8 123 9.8 9.6 102
----- -----
Basin Index (%) 151 105
CHEYENNE RIVER BASIN
Blind Park 6890 6.1 4.5 136 11.8 11.9 99
North Rapid Creek 6130 5.9 4.8 123 9.8 9.6 102
----- -----
Basin Index (%) 129 100
UPPER N. PLATTE
Arapaho Ridge 10976 25.8 23.2 111 25.5 23.1 110
Blackhall Mtn 9839 37.7 32.3 117 38.9 31.6 123
Cinnabar Park 9707 -M 20.5 * 24.0 24.5 98
Columbine 9167 27.7 21.6 128 27.7 26.4 105
Divide Peak 8730 27.9 19.3 145 29.9 22.8 131
Joe Wright 10158 26.4 21.9 121 29.2 27.6 106
Laprele Creek 8390 11.7 8.4 139 14.0 12.6 111
Med Bow 10512 39.1 -M * 35.6 -M *
Never Summer 10323 26.8 21.6 124 19.8 18.3 108
North French Creek 10153 30.0 31.6 95 30.7 28.5 108
Old Battle 9860 43.0 33.2 130 -M 35.6 *
Rawah 9069 13.6 10.4 131 17.8 16.9 105
Sage Creek Basin 7850 25.3 9.6 264 21.0 13.6 154
Sand Lake 10098 29.1 30.2 96 28.7 26.6 108
South Brush Creek 8495 13.2 9.6 138 14.9 14.4 103
Tower 10620 52.8 45.2 117 48.7 41.3 118
Webber Springs 9260 30.0 21.8 138 33.4 27.2 123
Whiskey Park 9020 38.3 26.1 147 36.6 29.0 126
Willow Creek Pass 9523 19.0 14.4 132 18.5 14.6 127
Zirkel 9338 32.3 25.8 125 36.0 32.8 110
----- -----
Basin Index (%) 126 115
SWEETWATER
Deer Park 9700 24.5 16.0 153 25.6 19.9 129
Larsen Creek 9000 10.7 8.8 122 14.9 14.4 103
South Pass 9040 19.8 15.8 125 20.8 16.8 124
----- -----
Basin Index (%) 135 120
LOWER N. PLATTE
Casper Mtn. 7920 14.5 13.5 107 15.2 15.2 100
Laprele Creek 8390 11.7 8.4 139 14.0 12.6 111
Reno Hill 8430 16.4 13.8 119 17.7 16.6 107
Windy Peak 7915 11.0 7.4 149 13.2 11.2 118
----- -----
Basin Index (%) 124 108
LARAMIE RIVER
Brooklyn Lake 10250 24.9 21.8 114 26.6 23.4 114
Cinnabar Park 9707 -M 20.5 * 24.0 24.5 98
Crow Creek 8335 3.8 4.5 84 9.6 11.2 86
Deadman Hill 10239 19.7 16.6 119 19.4 19.2 101
Rawah 9069 13.6 10.4 131 17.8 16.9 105
Roach 9740 17.9 16.0 112 21.8 20.1 108
Windy Peak 7915 11.0 7.4 149 13.2 11.2 118
----- -----
Basin Index (%) 119 105
S. PLATTE
Crow Creek 8335 3.8 4.5 84 9.6 11.2 86
----- -----
Basin Index (%) 84 86
LITTLE SNAKE RIVER
Battle Mountain 7498 15.4 6.8 226 23.2 16.0 145
Divide Peak 8730 27.9 19.3 145 29.9 22.8 131
Elk River 8739 26.6 16.6 160 28.7 20.4 141
Elkhead Divide 8800 31.4 -M * 32.2 -M *
Little Snake River 8928 37.6 25.1 150 43.8 34.0 129
Old Battle 9860 43.0 33.2 130 -M 35.6 *
Sage Creek Basin 7850 25.3 9.6 264 21.0 13.6 154
Sandstone RS 8152 23.3 10.8 216 25.8 18.5 139
Whiskey Park 9020 38.3 26.1 147 36.6 29.0 126
----- -----
Basin Index (%) 161 135
UPPER GREEN RIVER
Big Sandy Opening 9080 15.0 13.4 112 15.7 13.8 114
Blind Bull Sum 8650 27.0 25.0 108 19.5 18.2 107
East Rim Divide 7930 11.6 9.7 120 12.2 11.6 105
Elkhart Park G.S. 9400 12.6 12.8 98 12.3 13.0 95
Gros Ventre Summit 8750 12.9 13.2 98 11.7 13.2 89
Gunsight Pass 9820 13.9 13.4 104 13.6 14.6 93
Indian Creek 9425 30.0 24.8 121 25.3 20.2 125
Kendall R.S. 7740 12.2 9.8 124 13.6 13.5 101
Larsen Creek 9000 10.7 8.8 122 14.9 14.4 103
Loomis Park 8240 17.1 14.4 119 17.3 17.2 101
New Fork Lake 8340 11.0 9.8 112 -M 10.9 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.2 11.1 128 16.5 14.2 116
Spring Creek Divide 9000 29.4 25.2 117 -M 24.4 *
Triple Peak 8500 26.2 22.0 119 27.1 26.0 104
----- -----
Basin Index (%) 114 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.4 7.8 172 15.1 13.0 116
Buck Pasture 9632 21.1 -M * 22.4 -M *
EF Blacks Fork GS 9360 13.5 11.6 116 12.2 12.0 102
Hams Fork 7840 15.7 8.4 187 15.5 11.3 137
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 12.2 9.4 130 16.8 14.3 117
Hickerson Park 9122 10.6 6.4 166 13.1 11.0 119
Hole-in-Rock 9168 9.5 6.3 151 12.8 10.7 120
Indian Creek 9425 30.0 24.8 121 25.3 20.2 125
Kelley R.S. 8180 22.0 14.4 153 22.6 16.9 134
Spirit Lk 10235 22.4 13.2 170 22.1 18.9 117
Steel Creek Park 10158 21.7 15.7 138 20.7 17.2 120
----- -----
Basin Index (%) 145 121
UPPER BEAR RIVER
Bear River RS 8777 12.6 5.6 225 16.6 12.7 131
Bug Lake 7987 30.8 18.6 166 25.6 18.8 136
Burts Miller Ranch 8000 8.5 1.7 500 14.8 8.6 172
Chalk Creek #1 9171 34.4 23.6 146 32.9 24.0 137
Giveout 6930 15.0 4.0 375 16.0 13.0 123
Hayden Fork 9130 23.3 13.8 169 28.5 21.8 131
Kelley R.S. 8180 22.0 14.4 153 22.6 16.9 134
Lily Lake 9133 15.4 12.4 124 18.0 16.0 112
Monte Cristo 8932 45.3 27.4 165 39.6 26.8 148
Salt River Summit 7640 21.2 11.3 188 20.9 16.8 124
Spring Creek Divide 9000 29.4 25.2 117 -M 24.4 *
Trial Lake 9992 39.3 22.1 178 35.4 23.2 153
----- -----
Basin Index (%) 165 136
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.
