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: NOVEMBER 19 , 2021
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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 .6 2.0 30 3.6 4.3 84
Blind Bull Sum 8650 2.7 3.6 75 3.8 3.9 97
Cottonwood Creek 7670 2.1 3.0 70 7.6 5.0 152
East Rim Divide 7930 .3 1.1 27 2.4 2.4 100
Grand Targhee 9260 7.4 8.4 88 9.3 8.8 106
Granite Creek 6770 .0 1.4 0* 3.2 4.0 80
Grassy Lake 7265 1.8 3.6 50 8.1 6.5 125
Gros Ventre Summit 8750 1.7 2.6 65 2.5 3.2 78
Gunsight Pass 9820 2.3 2.3 100 3.9 3.5 111
Lewis Lake Divide 7850 2.2 4.0 55 12.5 6.7 187
Loomis Park 8240 .4 2.1 19 3.2 3.6 89
Phillips Bench 8200 1.6 3.4 47 5.3 5.2 102
Salt River Summit 7640 .3 1.2 25* 4.8 3.2 150
Snake River Station 6920 .4 1.6 25* 4.9 4.4 111
Somsen Ranch 6800 .3 1.1 27* 6.3 3.6 175
Spring Creek Divide 9000 3.6 3.5 103 6.2 4.6 135
Thumb Divide 7980 1.0 2.0 50 5.1 3.7 138
Togwotee Pass 9580 4.1 -M * 5.3 -M *
Triple Peak 8500 2.6 3.4 76 6.3 4.9 129
Two Ocean Plateau 9240 5.8 6.1 95 5.3 5.4 98
Willow Creek 8080 1.9 3.5 54 8.3 7.2 115
Younts Peak 8350 1.2 -M * 2.0 -M *
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Basin Index (%) 65 120
MADISON HEADWATERS IN WYOMING
Black Bear 8170 5.0 5.8 86 8.0 7.5 107
Canyon 7870 .4 -M * 3.5 -M *
Madison Plateau 7750 1.8 3.2 56 5.6 5.0 112
West Yellowstone 6700 .6 1.0 60* 4.0 2.8 143
Whiskey Creek 6800 .7 1.8 39 5.3 3.8 139
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Basin Index (%) 69 120
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 2.2 4.4 50 2.4 4.4 55
Canyon 7870 .4 -M * 3.5 -M *
Evening Star 9200 3.3 4.6 72 4.4 6.7 66
Fisher Creek 9100 4.2 5.8 72 6.2 7.2 86
Monument Peak 8850 3.3 4.2 79 5.6 5.4 104
Northeast Entrance 7350 .1 .9 11* 3.0 3.4 88
Parker Peak 9400 3.4 4.6 74 3.5 4.7 74
Sylvan Lake 8420 1.5 -M * 5.1 -M *
Thumb Divide 7980 1.0 2.0 50 5.1 3.7 138
Two Ocean Plateau 9240 5.8 6.1 95 5.3 5.4 98
White Mill 8700 3.4 4.2 81 4.3 5.4 80
Wolverine 7650 .3 1.2 25 2.7 3.0 90
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Basin Index (%) 71 86
WIND RIVER
Burroughs Creek 8750 .4 -M * 3.3 -M *
Castle Creek 8400 .2 .8 25 1.7 2.2 77
Cold Springs 9630 3.5 1.8 194 5.1 3.0 170
Deer Park 9700 3.2 -M * 5.6 -M *
Hobbs Park 10100 3.8 -M * 5.9 -M *
Kirwin 9550 2.1 -M * 3.2 -M *
Little Warm 9370 2.6 2.0 130 4.2 2.9 145
South Pass 9040 2.6 -M * 5.1 -M *
St. Lawrence Alt 8620 .2 -M * 4.0 -M *
Togwotee Pass 9580 4.1 -M * 5.3 -M *
Townsend Creek 8700 2.1 -M * 5.2 -M *
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Basin Index (%) 137 136
BIGHORN BASIN
Bald Mtn. 9380 5.0 -M * 5.5 -M *
Bear Trap Meadow 8200 1.0 -M * 3.4 -M *
Bone Springs Div 9350 4.2 -M * 4.6 -M *
Grave Springs 8550 .9 -M * 3.5 -M *
Kirwin 9550 2.1 -M * 3.2 -M *
Marquette 8760 .5 -M * 2.7 -M *
Middle Powder 7760 .7 -M * 3.5 -M *
Owl Creek 8975 2.2 -M * 3.0 -M *
Powder River Pass 9480 2.9 -M * 3.0 -M *
Shell Creek 9580 4.4 -M * 5.0 -M *
Timber Creek 7950 .3 -M * 1.9 -M *
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Basin Index (%) * *
SHOSHONE RIVER
Blackwater 9780 4.3 -M * 4.7 -M *
Evening Star 9200 3.3 4.6 72 4.4 6.7 66
Marquette 8760 .5 -M * 2.7 -M *
Sylvan Lake 8420 1.5 -M * 5.1 -M *
Sylvan Road 7120 .3 -M * -M -M *
Younts Peak 8350 1.2 -M * 2.0 -M *
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Basin Index (%) 72 66
POWDER RIVER
Bear Trap Meadow 8200 1.0 -M * 3.4 -M *
Cloud Peak Reservoir 9860 3.7 -M * 5.5 -M *
Grave Springs 8550 .9 -M * 3.5 -M *
Hansen Sawmill 8360 2.6 -M * 4.7 -M *
Middle Powder 7760 .7 -M * 3.5 -M *
Powder River Pass 9480 2.9 -M * 3.0 -M *
Soldier Park 8720 .3 -M * 4.4 -M *
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Basin Index (%) * *
TONGUE RIVER
Big Goose 7990 1.3 -M * 4.9 -M *
Bone Springs Div 9350 4.2 -M * 4.6 -M *
Burgess Junction 7880 2.0 -M * 4.1 -M *
Dome Lake 8880 2.5 -M * 4.7 -M *
Little Goose 8870 1.8 -M * 5.2 -M *
Sucker Creek 8880 3.2 -M * 5.0 -M *
Tie Creek 6870 .0 -M * 4.2 -M *
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Basin Index (%) * *
BELLE FOURCHE
Blind Park 6890 .5 1.2 42 3.4 2.8 121
Cole Canyon 5910 -M .7 * 3.8 2.4 158
North Rapid Creek 6130 .5 1.0 50 2.6 2.4 108
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Basin Index (%) 45 129
CHEYENNE RIVER BASIN
Blind Park 6890 .5 1.2 42 3.4 2.8 121
North Rapid Creek 6130 .5 1.0 50 2.6 2.4 108
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Basin Index (%) 45 115
UPPER N. PLATTE
Arapaho Ridge 10960 3.5 4.9 71 3.9 5.3 74
Blackhall Mtn 9820 4.8 4.8 100 6.7 6.7 100
Cinnabar Park 9574 3.4 3.7 92 5.2 5.4 96
Columbine 9160 1.9 3.0 63 6.0 5.5 109
Divide Peak 8880 .7 2.9 24 5.5 5.1 108
Joe Wright 10120 3.5 4.0 88 7.5 6.4 117
Laprele Creek 8375 .1 1.4 7 3.0 3.0 100
Med Bow 10500 6.1 -M * 7.4 -M *
Never Summer 10280 3.6 4.4 82 3.8 4.6 83
North French Creek 10130 5.7 4.8 119 7.4 5.6 132
Old Battle 10000 5.3 5.8 91 8.0 7.2 111
Rawah 9020 1.0 2.1 48 3.8 4.6 83
Sage Creek Basin 7850 .1 1.6 6 2.5 4.0 62
Sand Lake 10050 5.1 5.2 98 6.5 5.2 125
South Brush Creek 8440 .2 1.9 11 3.6 3.8 95
Tower 10500 10.0 7.9 127 10.7 8.1 132
Webber Springs 9250 2.1 3.6 58 5.2 5.6 93
Whiskey Park 8950 5.1 3.6 142 7.9 5.9 134
Willow Creek Pass 9540 1.8 3.0 60 2.9 3.7 78
Zirkel 9340 2.5 3.6 69 7.7 7.1 108
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Basin Index (%) 84 105
SWEETWATER
Deer Park 9700 3.2 -M * 5.6 -M *
Larsen Creek 9000 .3 .9 33* 4.9 3.2 153
South Pass 9040 2.6 -M * 5.1 -M *
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Basin Index (%) 33* 153
LOWER N. PLATTE
Casper Mtn. 7900 .8 2.4 33 5.8 3.6 161
Laprele Creek 8375 .1 1.4 7 3.0 3.0 100
Reno Hill 8400 1.8 2.5 72 5.5 3.8 145
Windy Peak 7900 .4 1.3 31 3.4 2.6 131
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Basin Index (%) 41 136
LARAMIE RIVER
Brooklyn Lake 10240 2.4 3.0 80 5.0 4.0 125
Cinnabar Park 9574 3.4 3.7 92 5.2 5.4 96
Crow Creek 8330 .1 1.0 10 2.6 2.9 90
Deadman Hill 10220 3.1 3.8 82 3.5 4.3 81
Rawah 9020 1.0 2.1 48 3.8 4.6 83
Roach 9700 2.1 3.2 66 3.8 4.4 86
Windy Peak 7900 .4 1.3 31 3.4 2.6 131
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Basin Index (%) 69 97
S. PLATTE
Crow Creek 8330 .1 1.0 10 2.6 2.9 90
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Basin Index (%) 10 90
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 1.0 10* 4.5 3.6 125
Divide Peak 8880 .7 2.9 24 5.5 5.1 108
Elk River 8700 1.1 2.1 52 6.0 4.2 143
Elkhead Divide 8780 .5 -M * 5.1 -M *
Little Snake River 8915 1.2 2.9 41 7.5 7.2 104
Old Battle 10000 5.3 5.8 91 8.0 7.2 111
Sage Creek Basin 7850 .1 1.6 6 2.5 4.0 62
Sandstone RS 8150 .1 1.3 8 4.5 3.8 118
Whiskey Park 8950 5.1 3.6 142 7.9 5.9 134
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Basin Index (%) 65 113
UPPER GREEN RIVER
Big Sandy Opening 9080 2.1 2.8 75 4.6 2.9 159
Blind Bull Sum 8650 2.7 3.6 75 3.8 3.9 97
East Rim Divide 7930 .3 1.1 27 2.4 2.4 100
Elkhart Park G.S. 9400 1.5 2.4 62 3.1 3.3 94
Gros Ventre Summit 8750 1.7 2.6 65 2.5 3.2 78
Gunsight Pass 9820 2.3 2.3 100 3.9 3.5 111
Indian Creek 9425 4.2 3.9 108 6.1 4.2 145
Kendall R.S. 7740 .0 1.4 0 3.4 3.0 113
Larsen Creek 9000 .3 .9 33* 4.9 3.2 153
Loomis Park 8240 .4 2.1 19 3.2 3.6 89
New Fork Lake 8340 .5 1.7 29 2.6 2.4 108
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .1 1.5 7 4.5 3.0 150
Spring Creek Divide 9000 3.6 3.5 103 6.2 4.6 135
Triple Peak 8500 2.6 3.4 76 6.3 4.9 129
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Basin Index (%) 67 120
LOWER GREEN RIVER
Blacks Fork Jct 8869 .6 .6 100* 2.8 2.6 108
Buck Pasture 9632 1.4 -M * 5.1 -M *
EF Blacks Fork GS 9360 .3 1.2 25 4.4 2.8 157
Hams Fork 7840 .3 1.0 30* 4.4 2.6 169
Henrys Fork 10182 -M -M * 3.7 -M *
Hewinta 9500 .3 1.1 27 4.2 3.3 127
Hickerson Park 9122 .7 1.2 58 3.0 2.8 107
Hole-in-Rock 9168 .5 1.0 50 3.4 2.8 121
Indian Creek 9425 4.2 3.9 108 6.1 4.2 145
Kelley R.S. 8180 .8 2.0 40 5.8 3.6 161
Spirit Lk 10235 2.2 2.2 100 4.2 4.2 100
Steel Creek Park 10158 3.3 2.6 127 5.4 4.0 135
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Basin Index (%) 79 133
UPPER BEAR RIVER
Bear River RS 8777 .1 1.0 10 3.8 3.0 127
Bug Lake 7987 .2 2.0 10 5.6 3.8 147
Burts Miller Ranch 8000 .1 .5 20* 2.1 1.8 117
Chalk Creek #1 9171 2.4 3.4 71 6.5 5.0 130
Giveout 6930 .2 .5 40* 4.2 2.9 145
Hayden Fork 9130 .3 1.5 20 6.1 4.3 142
Kelley R.S. 8180 .8 2.0 40 5.8 3.6 161
Lily Lake 9133 .5 1.6 31 4.8 3.8 126
Monte Cristo 8932 2.7 2.7 100* 7.5 4.8 156
Salt River Summit 7640 .3 1.2 25* 4.8 3.2 150
Spring Creek Divide 9000 3.6 3.5 103 6.2 4.6 135
Trial Lake 9992 2.7 3.4 79 6.2 4.6 135
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Basin Index (%) 60 140
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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.
