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: NOVEMBER 19 , 2020
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 5.0 2.0 250 6.3 4.4 143
Blind Bull Sum 8650 4.4 3.4 129 4.0 4.1 98
Cottonwood Creek 7670 4.0 2.7 148 5.6 5.1 110
East Rim Divide 7930 1.7 1.3 131 2.7 2.6 104
Grand Targhee 9260 9.1 8.4 108 6.6 8.8 75
Granite Creek 6770 3.2 1.4 229* 5.6 3.9 144
Grassy Lake 7265 5.4 4.1 132 7.9 7.0 113
Gros Ventre Summit 8750 2.9 2.8 104 4.3 3.2 134
Gunsight Pass 9820 3.3 2.5 132 3.5 3.4 103
Lewis Lake Divide 7850 5.7 4.5 127 8.3 7.0 119
Loomis Park 8240 2.6 2.1 124 4.2 3.6 117
Phillips Bench 8200 5.7 3.5 163 7.4 5.3 140
Salt River Summit 7640 2.1 1.1 191* 3.6 3.3 109
Snake River Station 6920 3.1 1.5 207* 6.3 4.7 134
Somsen Ranch 6800 2.2 .9 244* 3.8 3.6 106
Spring Creek Divide 9000 4.8 3.4 141 5.6 4.8 117
Thumb Divide 7980 3.5 2.1 167 4.7 4.0 118
Togwotee Pass 9580 6.7 5.1 131 8.0 5.5 145
Triple Peak 8500 5.0 3.4 147 6.1 5.0 122
Two Ocean Plateau 9240 8.0 6.2 129 4.9 6.0 82
Willow Creek 8080 3.8 3.7 103 5.7 7.1 80
Younts Peak 8350 3.7 3.0 123 6.9 3.9 177
----- -----
Basin Index (%) 139 115
MADISON HEADWATERS IN WYOMING
Black Bear 8170 6.2 6.5 95 7.6 7.6 100
Canyon 7870 2.2 1.8 122 3.4 3.6 94
Madison Plateau 7750 4.0 3.4 118 5.6 5.2 108
West Yellowstone 6700 2.1 1.1 191 4.0 3.1 129
Whiskey Creek 6800 2.6 1.9 137 4.9 4.2 117
----- -----
Basin Index (%) 116 108
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 8.7 4.8 181 8.7 4.1 212
Canyon 7870 2.2 1.8 122 3.4 3.6 94
Evening Star 9200 8.9 5.1 175 10.2 6.2 165
Fisher Creek 9100 11.3 6.1 185 14.0 6.8 206
Monument Peak 8850 7.4 4.1 180 9.3 4.9 190
Northeast Entrance 7350 1.3 .9 144* 6.9 3.2 216
Parker Peak 9400 6.7 4.6 146 7.5 4.4 170
Sylvan Lake 8420 3.7 3.7 100 6.6 5.5 120
Thumb Divide 7980 3.5 2.1 167 4.7 4.0 118
Two Ocean Plateau 9240 8.0 6.2 129 4.9 6.0 82
White Mill 8700 10.4 4.4 236 10.8 5.4 200
Wolverine 7650 1.5 1.0 150 7.6 3.1 245
----- -----
Basin Index (%) 164 165
WIND RIVER
Burroughs Creek 8750 2.9 -M * 6.3 -M *
Castle Creek 8400 2.1 -M * 3.6 -M *
Cold Springs 9630 1.4 1.8 78 2.6 3.0 87
Deer Park 9700 3.1 3.3 94 4.4 4.7 94
Grave Springs 8550 -M 1.4 * 1.3 3.2 41
Hobbs Park 10100 1.8 3.6 50 2.4 3.7 65
Kirwin 9550 3.9 2.8 139 4.9 3.2 153
Little Warm 9370 3.1 2.2 141 4.6 3.3 139
South Pass 9040 2.8 2.9 97 3.6 4.1 88
St. Lawrence Alt 8620 .3 1.5 20 1.3 2.7 48
Togwotee Pass 9580 6.7 5.1 131 8.0 5.5 145
Townsend Creek 8700 1.1 1.9 58 2.4 3.4 71
----- -----
Basin Index (%) 96 96
BIGHORN BASIN
Bald Mtn. 9380 5.1 4.5 113 6.3 4.3 147
Bear Trap Meadow 8200 .8 1.1 73 3.0 2.6 115
Bone Springs Div 9350 4.4 4.2 105 4.0 4.1 98
Grave Springs 8550 -M 1.4 * 1.3 3.2 41
Kirwin 9550 3.9 2.8 139 4.9 3.2 153
Marquette 8760 1.3 -M * 2.2 -M *
Middle Powder 7760 .5 1.9 26 2.1 3.7 57
Owl Creek 8975 1.2 1.3 92 1.3 1.9 68
Powder River Pass 9480 3.3 2.2 150 3.2 3.3 97
Shell Creek 9580 -M 4.0 * -M 3.7 *
Timber Creek 7950 .8 1.3 62 1.4 2.9 48
----- -----
Basin Index (%) 104 94
SHOSHONE RIVER
Blackwater 9780 7.5 4.9 153 7.7 5.0 154
Evening Star 9200 8.9 5.1 175 10.2 6.2 165
Marquette 8760 1.3 -M * 2.2 -M *
Sylvan Lake 8420 3.7 3.7 100 6.6 5.5 120
Sylvan Road 7120 2.2 1.5 147 -M 4.3 *
Younts Peak 8350 3.7 3.0 123 6.9 3.9 177
----- -----
Basin Index (%) 143 152
POWDER RIVER
Bear Trap Meadow 8200 .8 1.1 73 3.0 2.6 115
Cloud Peak Reservoir 9860 3.1 3.1 100 4.3 4.0 108
Grave Springs 8550 -M 1.4 * 1.3 3.2 41
Hansen Sawmill 8360 2.0 1.1 182 2.7 2.6 104
Middle Powder 7760 .5 1.9 26 2.1 3.7 57
Powder River Pass 9480 3.3 2.2 150 3.2 3.3 97
Soldier Park 8720 .6 -M * 3.1 -M *
----- -----
Basin Index (%) 103 86
TONGUE RIVER
Big Goose 7990 1.8 1.7 106 4.1 3.5 117
Bone Springs Div 9350 4.4 4.2 105 4.0 4.1 98
Burgess Junction 7880 2.5 2.5 100 3.9 3.6 108
Dome Lake 8880 2.8 2.9 97 5.1 4.1 124
Little Goose 8870 2.2 -M * 4.3 -M *
Sucker Creek 8880 3.5 2.7 130 5.3 4.0 132
Tie Creek 6870 .0 .6 0 3.3 3.6 92
----- -----
Basin Index (%) 103 112
BELLE FOURCHE
Blind Park 6890 .9 1.3 69 3.1 3.8 82
Cole Canyon 5910 .0 .4 0* 2.5 3.0 83
North Rapid Creek 6130 1.1 1.0 110 3.0 3.3 91
----- -----
Basin Index (%) 74 85
CHEYENNE RIVER BASIN
Blind Park 6890 .9 1.3 69 3.1 3.8 82
North Rapid Creek 6130 1.1 1.0 110 3.0 3.3 91
----- -----
Basin Index (%) 87 86
UPPER N. PLATTE
Arapaho Ridge 10960 4.7 4.6 102 4.9 5.7 86
Blackhall Mtn 9820 5.4 -M * 6.3 -M *
Cinnabar Park 9574 3.0 3.7 81 3.8 5.2 73
Columbine 9160 2.7 3.0 90 4.2 5.3 79
Divide Peak 8880 2.1 3.3 64 3.8 5.2 73
Joe Wright 10120 3.7 4.7 79 4.6 6.4 72
Laprele Creek 8375 .6 1.8 33 1.7 3.4 50
Med Bow 10500 6.8 -M * 6.7 -M *
Never Summer 10280 4.5 4.2 107 3.3 -M *
North French Creek 10130 3.9 4.8 81 4.1 5.9 69
Old Battle 10000 5.5 5.8 95 5.7 7.6 75
Rawah 9020 2.4 1.8 133 3.7 4.1 90
Sage Creek Basin 7850 1.5 1.7 88 2.0 3.6 56
Sand Lake 10050 5.8 5.2 112 5.5 5.7 96
South Brush Creek 8440 1.5 1.7 88 2.3 3.8 61
Tower 10500 4.3 8.5 51 6.3 8.7 72
Webber Springs 9250 4.5 3.4 132 4.8 5.9 81
Whiskey Park 8950 3.5 3.5 100 4.3 5.7 75
Willow Creek Pass 9540 2.4 2.7 89 2.4 3.5 69
Zirkel 9340 2.8 3.3 85 5.2 6.8 76
----- -----
Basin Index (%) 88 75
SWEETWATER
Deer Park 9700 3.1 3.3 94 4.4 4.7 94
Larsen Creek 9000 1.6 1.5 107 2.6 -M *
South Pass 9040 2.8 2.9 97 3.6 4.1 88
----- -----
Basin Index (%) 97 91
LOWER N. PLATTE
Casper Mtn. 7900 .1 2.8 4 1.1 4.4 25
Laprele Creek 8375 .6 1.8 33 1.7 3.4 50
Reno Hill 8400 .7 2.5 28 1.9 4.1 46
Windy Peak 7900 .3 1.5 20 1.9 3.0 63
----- -----
Basin Index (%) 20 44
LARAMIE RIVER
Brooklyn Lake 10240 3.8 3.3 115 5.0 4.4 114
Cinnabar Park 9574 3.0 3.7 81 3.8 5.2 73
Crow Creek 8330 .1 1.1 9 2.4 2.9 83
Deadman Hill 10220 3.5 3.6 97 4.0 4.3 93
Rawah 9020 2.4 1.8 133 3.7 4.1 90
Roach 9700 3.1 2.8 111 3.7 4.4 84
Windy Peak 7900 .3 1.5 20 1.9 3.0 63
----- -----
Basin Index (%) 91 87
S. PLATTE
Crow Creek 8330 .1 1.1 9 2.4 2.9 83
----- -----
Basin Index (%) 9 83
LITTLE SNAKE RIVER
Battle Mountain 7440 .8 .9 89* 1.5 3.6 42
Divide Peak 8880 2.1 3.3 64 3.8 5.2 73
Elk River 8700 2.1 1.7 124* 1.4 4.4 32
Elkhead Divide 8780 2.2 -M * 3.5 -M *
Little Snake River 8915 2.8 2.9 97 5.0 6.9 72
Old Battle 10000 5.5 5.8 95 5.7 7.6 75
Sage Creek Basin 7850 1.5 1.7 88 2.0 3.6 56
Sandstone RS 8150 1.3 1.1 118* 1.7 4.2 40
Whiskey Park 8950 3.5 3.5 100 4.3 5.7 75
----- -----
Basin Index (%) 94 62
UPPER GREEN RIVER
Big Sandy Opening 9080 2.1 2.9 72 2.2 3.2 69
Blind Bull Sum 8650 4.4 3.4 129 4.0 4.1 98
East Rim Divide 7930 1.7 1.3 131 2.7 2.6 104
Elkhart Park G.S. 9400 2.2 2.5 88 2.2 3.3 67
Gros Ventre Summit 8750 2.9 2.8 104 4.3 3.2 134
Gunsight Pass 9820 3.3 2.5 132 3.5 3.4 103
Indian Creek 9425 4.3 4.3 100 4.4 4.5 98
Kendall R.S. 7740 2.6 1.7 153 4.2 3.1 135
Larsen Creek 9000 1.6 1.5 107 2.6 -M *
Loomis Park 8240 2.6 2.1 124 4.2 3.6 117
New Fork Lake 8340 1.9 1.7 112 3.1 2.7 115
Pocket Creek 9360 -M -M * 2.0 -M *
Snider Basin 8060 2.4 1.7 141 3.8 2.9 131
Spring Creek Divide 9000 4.8 3.4 141 5.6 4.8 117
Triple Peak 8500 5.0 3.4 147 6.1 5.0 122
----- -----
Basin Index (%) 119 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 .8 -M * 2.7 -M *
Buck Pasture 9632 2.7 -M * 3.6 -M *
EF Blacks Fork GS 9360 1.3 -M * 2.8 -M *
Hams Fork 7840 2.6 1.3 200 2.8 2.6 108
Henrys Fork 10182 -M -M * 2.5 -M *
Hewinta 9500 1.4 1.3 108 3.8 3.6 106
Hickerson Park 9122 1.2 1.3 92 2.3 3.2 72
Hole-in-Rock 9168 .8 1.1 73 2.6 3.0 87
Indian Creek 9425 4.3 4.3 100 4.4 4.5 98
Kelley R.S. 8180 3.2 2.1 152 4.1 3.8 108
Spirit Lk 10235 3.3 -M * 3.6 -M *
Steel Creek Park 10158 2.7 3.0 90 3.9 4.1 95
----- -----
Basin Index (%) 112 96
UPPER BEAR RIVER
Bear River RS 8777 1.6 -M * 3.0 -M *
Bug Lake 7987 3.4 2.3 148 4.3 4.2 102
Burts Miller Ranch 8000 .6 -M * 2.1 -M *
Chalk Creek #1 9171 2.9 3.6 81 4.6 5.8 79
Dry Bread Pond 8302 2.8 1.8 156* 3.9 4.3 91
Giveout 6930 1.6 .6 267* 3.2 2.9 110
Hayden Fork 9130 1.9 2.0 95 4.6 4.8 96
Kelley R.S. 8180 3.2 2.1 152 4.1 3.8 108
Lily Lake 9133 2.4 2.0 120 3.2 4.2 76
Monte Cristo 8932 4.3 3.0 143 4.8 5.4 89
Salt River Summit 7640 2.1 1.1 191* 3.6 3.3 109
Spring Creek Divide 9000 4.8 3.4 141 5.6 4.8 117
Trial Lake 9992 3.7 3.2 116 3.8 5.2 73
----- -----
Basin Index (%) 132 94
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.