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 2 , 2020
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7060 13.3 13.6 98 13.9 17.4 80
Black Bear 8170 26.3 29.7 89 24.6 31.0 79
Blind Bull Sum 8650 20.9 18.0 116 12.3 16.0 77
Cottonwood Creek 7670 22.9 17.1 134 24.0 19.7 122
East Rim Divide 7930 10.3 8.2 126 8.1 9.6 84
Grand Targhee 9260 33.8 30.3 112 23.9 25.0 96
Granite Creek 6770 13.8 13.8 100 12.7 16.6 77
Grassy Lake 7265 25.9 26.3 98 26.0 29.6 88
Gros Ventre Summit 8750 9.4 9.8 96 9.3 10.2 91
Gunsight Pass 9820 10.6 10.6 100 10.6 10.9 97
Lewis Lake Divide 7850 20.0 25.2 79 23.2 29.0 80
Phillips Bench 8200 23.4 19.8 118 22.6 22.9 99
Salt River Summit 7640 12.6 10.7 118 12.7 13.5 94
Snake River Station 6920 13.9 14.3 97 16.2 18.7 87
Spring Creek Divide 9000 21.7 18.7 116 20.6 19.3 107
Thumb Divide 7980 11.4 12.3 93 11.4 14.7 78
Togwotee Pass 9580 22.5 17.9 126 21.5 19.5 110
Two Ocean Plateau 9240 23.3 21.6 108 18.9 21.8 87
Willow Creek 8080 29.1 22.4 130 28.6 27.0 106
Younts Peak 8350 14.3 11.7 122 11.6 12.7 91
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Basin Index (%) 108 92
MADISON-GALLATIN
Black Bear 8170 26.3 29.7 89 24.6 31.0 79
Canyon 7870 10.9 10.6 103 11.1 13.1 85
Madison Plateau 7750 16.3 17.9 91 14.2 21.3 67
West Yellowstone 6700 8.8 9.0 98 7.5 11.7 64
Whiskey Creek 6800 11.6 12.1 96 13.2 16.3 81
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Basin Index (%) 93 76
YELLOWSTONE
Beartooth Lake 9360 18.2 16.9 108 16.7 15.8 106
Burnt Mtn 5880 5.5 4.0 138 10.2 9.6 106
Canyon 7870 10.9 10.6 103 11.1 13.1 85
Cole Creek 7850 14.4 10.1 143 10.6 9.1 116
Evening Star 9200 22.3 19.2 116 24.2 22.2 109
Fisher Creek 9100 25.2 25.9 97 25.9 25.7 101
Northeast Entrance 7350 8.9 8.3 107 10.0 9.9 101
Parker Peak 9400 20.8 16.1 129 19.1 14.1 135
Sylvan Lake 8420 16.9 15.9 106 18.4 18.0 102
Thumb Divide 7980 11.4 12.3 93 11.4 14.7 78
Two Ocean Plateau 9240 23.3 21.6 108 18.9 21.8 87
White Mill 8700 20.7 18.4 112 16.9 19.1 88
Wolverine 7650 11.4 8.5 134 10.8 10.0 108
Younts Peak 8350 14.3 11.7 122 11.6 12.7 91
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Basin Index (%) 112 100
WIND RIVER
Burroughs Creek 8750 10.1 -M * 11.4 -M *
Castle Creek 8400 4.5 -M * 5.1 -M *
Cold Springs 9630 6.2 5.5 113 5.8 7.5 77
Deer Park 9700 10.2 10.8 94 8.9 15.4 58
Hobbs Park 10100 10.7 9.8 109 8.9 9.5 94
Kirwin 9550 9.3 7.0 133 7.9 8.8 90
Little Warm 9370 9.3 8.0 116 7.5 9.9 76
Owl Creek 8975 5.3 3.9 136 5.6 4.3 130
South Pass 9040 9.1 11.5 79 8.0 13.5 59
St. Lawrence Alt 8620 4.4 5.2 85 5.8 6.6 88
Togwotee Pass 9580 22.5 17.9 126 21.5 19.5 110
Townsend Creek 8700 7.6 6.6 115 7.5 8.7 86
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Basin Index (%) 110 84
BIGHORN BASIN
Bald Mtn. 9380 18.4 14.8 124 13.6 13.2 103
Bear Trap Meadow 8200 8.2 4.4 186 8.1 6.2 131
Bone Springs Div 9350 14.6 12.2 120 12.1 11.8 103
Grave Springs 8550 9.1 6.9 132 9.6 8.0 120
Kirwin 9550 9.3 7.0 133 7.9 8.8 90
Marquette 8760 6.0 -M * 7.3 -M *
Middle Powder 7760 11.2 8.1 138 10.8 8.8 123
Owl Creek 8975 5.3 3.9 136 5.6 4.3 130
Powder River Pass 9480 11.0 8.0 138 10.8 9.6 112
Shell Creek 9580 12.5 11.7 107 11.9 10.7 111
Timber Creek 7950 5.3 3.8 139 5.9 5.3 111
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Basin Index (%) 130 111
SHOSHONE RIVER
Blackwater 9780 17.9 17.3 103 18.0 16.2 111
Evening Star 9200 22.3 19.2 116 24.2 22.2 109
Marquette 8760 6.0 -M * 7.3 -M *
Sylvan Lake 8420 16.9 15.9 106 18.4 18.0 102
Sylvan Road 7120 10.5 9.5 111 -M 13.9 *
Younts Peak 8350 14.3 11.7 122 11.6 12.7 91
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Basin Index (%) 111 104
POWDER RIVER
Bear Trap Meadow 8200 8.2 4.4 186 8.1 6.2 131
Cloud Peak Reservoir 9860 11.7 10.4 112 10.8 9.6 112
Grave Springs 8550 9.1 6.9 132 9.6 8.0 120
Hansen Sawmill 8360 6.1 4.7 130 7.1 6.1 116
Middle Powder 7760 11.2 8.1 138 10.8 8.8 123
Powder River Pass 9480 11.0 8.0 138 10.8 9.6 112
Soldier Park 8720 4.7 -M * 7.3 -M *
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Basin Index (%) 135 118
TONGUE RIVER
Big Goose 7990 7.4 6.2 119 8.4 7.9 106
Bone Springs Div 9350 14.6 12.2 120 12.1 11.8 103
Burgess Junction 7880 9.8 8.3 118 10.7 9.0 119
Dome Lake 8880 10.6 8.7 122 7.9 10.0 79
Little Goose 8870 9.0 -M * 6.9 -M *
Sucker Creek 8880 11.8 9.0 131 10.8 10.7 101
Tie Creek 6870 7.6 4.3 177 11.3 8.5 133
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Basin Index (%) 127 106
BELLE FOURCHE
Blind Park 6890 7.2 6.4 112 7.2 9.5 76
Cole Canyon 5910 -M 4.9 * -M 7.1 *
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Basin Index (%) 112 76
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 6.4 112 7.2 9.5 76
North Rapid Creek 6130 6.8 5.9 115 7.3 7.7 95
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Basin Index (%) 114 84
UPPER N. PLATTE
Arapaho Ridge 10960 19.2 16.8 114 18.6 17.8 104
Blackhall Mtn 9820 25.1 -M * 24.5 -M *
Columbine 9160 27.7 19.9 139 25.3 20.4 124
Divide Peak 8880 18.0 15.9 113 18.5 16.8 110
Joe Wright 10120 18.3 16.8 109 22.8 20.0 114
Laprele Creek 8375 11.0 7.8 141 11.2 9.3 120
Med Bow 10500 37.9 -M * 30.5 -M *
Never Summer 10280 16.6 16.3 102 12.4 -M *
North French Creek 10130 29.5 21.1 140 28.3 21.1 134
Old Battle 10000 26.3 24.1 109 24.2 28.0 86
Rawah 9020 11.4 8.8 130 12.8 11.0 116
Sage Creek Basin 7850 13.8 10.6 130 10.8 11.8 92
Sand Lake 10050 25.1 21.2 118 23.2 19.0 122
South Brush Creek 8440 11.7 10.3 114 11.6 11.8 98
Tower 10500 39.5 36.5 108 33.0 32.0 103
Webber Springs 9250 18.6 18.8 99 20.1 21.2 95
Whiskey Park 8950 29.7 21.7 137 27.9 22.4 125
Willow Creek Pass 9540 11.2 9.6 117 10.6 10.4 102
Zirkel 9340 24.9 23.1 108 26.6 23.6 113
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Basin Index (%) 118 110
SWEETWATER
Deer Park 9700 10.2 10.8 94 8.9 15.4 58
Larsen Creek 9000 -M 9.6 * 6.4 -M *
South Pass 9040 9.1 11.5 79 8.0 13.5 59
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Basin Index (%) 87 58
LOWER N. PLATTE
Casper Mtn. 7900 14.3 10.3 139 9.4 11.2 84
Laprele Creek 8375 11.0 7.8 141 11.2 9.3 120
Reno Hill 8400 14.6 10.2 143 14.8 11.1 133
Windy Peak 7900 8.8 5.8 152 7.2 7.8 92
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Basin Index (%) 143 108
LARAMIE RIVER
Brooklyn Lake 10240 23.7 15.1 157 22.6 16.1 140
Cinnabar Park 9574 21.2 17.2 123 22.9 19.8 116
Crow Creek 8330 7.2 6.7 107 9.2 7.8 118
Deadman Hill 10220 15.6 12.5 125 13.7 12.8 107
Rawah 9020 11.4 8.8 130 12.8 11.0 116
Roach 9700 12.5 12.5 100 12.3 14.7 84
Windy Peak 7900 8.8 5.8 152 7.2 7.8 92
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Basin Index (%) 128 112
S. PLATTE
Black Mountain 8920 9.1 -M * 11.0 -M *
Crow Creek 8330 7.2 6.7 107 9.2 7.8 118
Deadman Hill 10220 15.6 12.5 125 13.7 12.8 107
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Basin Index (%) 119 111
LITTLE SNAKE RIVER
Battle Mountain 7440 12.6 9.9 127 12.7 12.1 105
Divide Peak 8880 18.0 15.9 113 18.5 16.8 110
Elk River 8700 18.5 15.7 118 15.5 16.0 97
Little Snake River 8915 24.3 19.8 123 28.2 25.1 112
Old Battle 10000 26.3 24.1 109 24.2 28.0 86
Sage Creek Basin 7850 13.8 10.6 130 10.8 11.8 92
Sandstone RS 8150 14.8 10.5 141 13.7 15.1 91
Whiskey Park 8950 29.7 21.7 137 27.9 22.4 125
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Basin Index (%) 123 103
UPPER GREEN RIVER
Big Sandy Opening 9080 7.8 10.2 76 6.7 10.6 63
Blind Bull Sum 8650 20.9 18.0 116 12.3 16.0 77
East Rim Divide 7930 10.3 8.2 126 8.1 9.6 84
Elkhart Park G.S. 9400 9.0 9.5 95 8.6 10.6 81
Gros Ventre Summit 8750 9.4 9.8 96 9.3 10.2 91
Gunsight Pass 9820 10.6 10.6 100 10.6 10.9 97
Indian Creek 9425 19.1 19.0 101 13.6 17.9 76
Kendall R.S. 7740 8.9 9.8 91 8.8 11.7 75
Loomis Park 8240 12.4 11.8 105 15.1 14.1 107
New Fork Lake 8340 9.0 8.3 108 7.1 8.8 81
Pocket Creek 9360 -M -M * 6.5 -M *
Snider Basin 8060 11.8 9.7 122 12.1 11.6 104
Spring Creek Divide 9000 21.7 18.7 116 20.6 19.3 107
Triple Peak 8500 22.2 17.0 131 22.2 20.3 109
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Basin Index (%) 108 90
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.5 -M * 9.9 -M *
Buck Pasture 9632 15.1 -M * 14.5 -M *
EF Blacks Fork GS 9360 12.3 -M * 9.7 -M *
Hams Fork 7840 11.1 9.3 119 9.6 9.2 104
Hewinta 9500 9.1 8.0 114 12.2 10.9 112
Hickerson Park 9122 8.9 6.0 148 9.2 7.6 121
Hole-in-Rock 9168 8.9 5.6 159 8.7 7.1 123
Indian Creek 9425 19.1 19.0 101 13.6 17.9 76
Kelley R.S. 8180 13.0 12.2 107 13.9 14.6 95
Spirit Lk 10235 13.5 -M * 14.4 -M *
Steel Creek Park 10158 14.2 11.6 122 15.0 12.5 120
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Basin Index (%) 118 103
UPPER BEAR RIVER
Bear River RS 8777 7.8 -M * 9.0 -M *
Bug Lake 7987 16.2 14.9 109 15.1 15.5 97
Burts Miller Ranch 8000 5.7 -M * 5.9 -M *
Chalk Creek #1 9171 16.5 18.5 89 15.3 19.5 78
Hayden Fork 9130 13.7 12.2 112 16.8 16.4 102
Kelley R.S. 8180 13.0 12.2 107 13.9 14.6 95
Lily Lake 9133 9.9 10.4 95 10.0 13.3 75
Monte Cristo 8932 23.0 21.2 108 20.3 20.6 99
Salt River Summit 7640 12.6 10.7 118 12.7 13.5 94
Spring Creek Divide 9000 21.7 18.7 116 20.6 19.3 107
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Basin Index (%) 107 94
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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.
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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.