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 18 , 2019
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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 18.2 14.6 125 20.4 18.9 108
Black Bear 8170 40.6 32.2 126 39.7 34.2 116
Blind Bull Sum 8650 21.4 20.3 105 17.0 17.5 97
Cottonwood Creek 7670 19.2 19.5 98 22.4 21.7 103
East Rim Divide 7930 10.3 9.5 108 10.4 10.5 99
Grand Targhee 9260 39.0 32.8 119 29.2 26.8 109
Granite Creek 6770 18.8 15.0 125 19.6 18.0 109
Grassy Lake 7265 31.5 29.1 108 34.6 32.3 107
Gros Ventre Summit 8750 8.9 11.4 78 11.2 11.3 99
Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117
Lewis Lake Divide 7850 32.9 27.5 120 30.9 31.8 97
Phillips Bench 8200 27.2 22.2 123 29.8 25.1 119
Salt River Summit 7640 12.5 11.9 105 14.2 14.8 96
Snake River Station 6920 19.9 15.2 131 24.1 20.2 119
Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102
Thumb Divide 7980 17.5 13.9 126 17.6 16.3 108
Togwotee Pass 9580 22.1 20.4 108 22.7 21.5 106
Two Ocean Plateau 9240 28.0 23.8 118 23.8 24.1 99
Willow Creek 8080 28.1 25.3 111 31.0 29.6 105
Younts Peak 8350 -M 13.2 * -M 14.0 *
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Basin Index (%) 114 106
MADISON-GALLATIN
Black Bear 8170 40.6 32.2 126 39.7 34.2 116
Canyon 7870 12.7 11.7 109 14.6 14.4 101
Madison Plateau 7750 26.4 20.0 132 25.5 23.4 109
West Yellowstone 6700 14.1 9.9 142 16.1 12.6 128
Whiskey Creek 6800 18.5 13.9 133 19.0 18.0 106
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Basin Index (%) 128 112
YELLOWSTONE
Beartooth Lake 9360 18.4 19.0 97 17.2 17.5 98
Burnt Mtn 5880 8.0 4.5 178 12.1 10.6 114
Canyon 7870 12.7 11.7 109 14.6 14.4 101
Cole Creek 7850 14.3 11.8 121 -M 10.5 *
Evening Star 9200 23.7 21.9 108 26.2 24.2 108
Fisher Creek 9100 28.3 28.1 101 31.1 28.3 110
Northeast Entrance 7350 10.1 8.9 113 12.2 10.9 112
Parker Peak 9400 21.7 17.5 124 21.6 15.5 139
Sylvan Lake 8420 19.4 17.9 108 24.7 19.7 125
Thumb Divide 7980 17.5 13.9 126 17.6 16.3 108
Two Ocean Plateau 9240 28.0 23.8 118 23.8 24.1 99
White Mill 8700 20.0 19.7 102 17.6 21.0 84
Wolverine 7650 11.7 8.8 133 11.5 10.8 106
Younts Peak 8350 -M 13.2 * -M 14.0 *
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Basin Index (%) 113 108
WIND RIVER
Burroughs Creek 8750 9.8 -M * 11.7 -M *
Castle Creek 8400 3.9 -M * 5.1 -M *
Cold Springs 9630 6.2 6.2 100 6.5 8.4 77
Deer Park 9700 15.0 12.8 117 16.2 16.9 96
Hobbs Park 10100 12.8 11.5 111 9.8 10.9 90
Kirwin 9550 9.3 8.3 112 9.8 9.8 100
Little Warm 9370 7.8 9.1 86 7.7 11.0 70
Owl Creek 8975 4.6 4.6 100 5.0 4.9 102
South Pass 9040 12.6 13.4 94 10.5 15.1 70
St. Lawrence Alt 8620 4.1 6.0 68 7.5 7.4 101
Togwotee Pass 9580 22.1 20.4 108 22.7 21.5 106
Townsend Creek 8700 8.2 8.0 102 9.1 9.9 92
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Basin Index (%) 102 91
BIGHORN BASIN
Bald Mtn. 9380 15.6 16.4 95 11.4 14.6 78
Bear Trap Meadow 8200 7.6 4.9 155 6.3 6.9 91
Bone Springs Div 9350 11.9 13.9 86 10.4 13.2 79
Grave Springs 8550 7.5 8.0 94 8.5 8.8 97
Kirwin 9550 9.3 8.3 112 9.8 9.8 100
Marquette 8760 6.5 -M * 7.9 -M *
Middle Powder 7760 8.5 9.5 89 4.5 9.8 46
Owl Creek 8975 4.6 4.6 100 5.0 4.9 102
Powder River Pass 9480 9.0 9.0 100 8.6 10.6 81
Shell Creek 9580 12.1 12.7 95 10.4 11.7 89
Timber Creek 7950 3.3 4.2 79 5.1 6.0 85
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Basin Index (%) 98 83
SHOSHONE RIVER
Blackwater 9780 21.4 20.5 104 21.7 17.9 121
Evening Star 9200 23.7 21.9 108 26.2 24.2 108
Marquette 8760 6.5 -M * 7.9 -M *
Sylvan Lake 8420 19.4 17.9 108 24.7 19.7 125
Sylvan Road 7120 11.5 10.3 112 15.1 15.0 101
Younts Peak 8350 -M 13.2 * -M 14.0 *
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Basin Index (%) 108 114
POWDER RIVER
Bear Trap Meadow 8200 7.6 4.9 155 6.3 6.9 91
Cloud Peak Reservoir 9860 10.7 12.6 85 9.8 11.0 89
Grave Springs 8550 7.5 8.0 94 8.5 8.8 97
Hansen Sawmill 8360 4.9 5.5 89 6.4 7.0 91
Middle Powder 7760 8.5 9.5 89 4.5 9.8 46
Powder River Pass 9480 9.0 9.0 100 8.6 10.6 81
Soldier Park 8720 3.8 -M * 6.1 -M *
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Basin Index (%) 97 82
TONGUE RIVER
Big Goose 7990 7.4 7.6 97 9.1 8.9 102
Bone Springs Div 9350 11.9 13.9 86 10.4 13.2 79
Burgess Junction 7880 7.6 9.4 81 7.8 10.3 76
Dome Lake 8880 8.0 10.0 80 7.3 11.2 65
Little Goose 8870 8.6 -M * 7.2 -M *
Sucker Creek 8880 10.0 10.7 93 9.2 12.0 77
Tie Creek 6870 4.5 4.9 92 8.9 9.6 93
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Basin Index (%) 87 81
BELLE FOURCHE
Blind Park 6890 8.8 7.2 122 7.1 10.4 68
Cole Canyon 5910 7.1 5.5 129 10.7 7.8 137
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Basin Index (%) 125 98
CHEYENNE RIVER BASIN
Blind Park 6890 8.8 7.2 122 7.1 10.4 68
North Rapid Creek 6130 7.6 6.4 119 6.6 8.5 78
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Basin Index (%) 121 72
UPPER N. PLATTE
Arapaho Ridge 10960 24.4 18.0 136 24.6 19.4 127
Blackhall Mtn 9820 31.1 -M * 31.1 -M *
Columbine 9160 29.0 21.8 133 27.1 22.6 120
Divide Peak 8880 20.4 17.4 117 22.4 18.8 119
Joe Wright 10120 21.1 18.9 112 28.4 22.5 126
Laprele Creek 8375 12.6 9.0 140 13.0 10.6 123
Med Bow 10500 35.9 -M * 32.5 -M *
Never Summer 10280 21.2 17.6 120 17.9 -M *
North French Creek 10130 28.9 24.6 117 28.6 23.4 122
Old Battle 10000 34.6 26.2 132 31.4 31.0 101
Rawah 9020 14.5 9.2 158 16.8 11.8 142
Sage Creek Basin 7850 17.6 11.6 152 16.0 12.9 124
Sand Lake 10050 27.7 24.2 114 23.8 21.3 112
South Brush Creek 8440 11.6 11.1 105 11.7 13.1 89
Tower 10500 49.1 39.5 124 -M 35.3 *
Webber Springs 9250 26.0 20.9 124 29.9 23.5 127
Whiskey Park 8950 30.2 24.1 125 31.5 24.7 128
Willow Creek Pass 9540 15.4 10.8 143 16.3 11.6 141
Zirkel 9340 32.7 25.8 127 -M 25.1 *
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Basin Index (%) 126 120
SWEETWATER
Deer Park 9700 15.0 12.8 117 16.2 16.9 96
Larsen Creek 9000 10.6 11.0 96 13.5 -M *
South Pass 9040 12.6 13.4 94 10.5 15.1 70
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Basin Index (%) 103 83
LOWER N. PLATTE
Casper Mtn. 7900 14.2 12.0 118 11.0 12.5 88
Laprele Creek 8375 12.6 9.0 140 13.0 10.6 123
Reno Hill 8400 15.0 11.8 127 15.5 12.7 122
Windy Peak 7900 10.5 6.9 152 10.3 8.9 116
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Basin Index (%) 132 111
LARAMIE RIVER
Brooklyn Lake 10240 23.2 17.5 133 24.3 18.1 134
Cinnabar Park 9574 20.1 17.8 113 22.1 21.1 105
Crow Creek 8330 5.7 7.0 81 9.6 8.7 110
Deadman Hill 10220 20.0 13.7 146 18.7 14.7 127
Rawah 9020 14.5 9.2 158 16.8 11.8 142
Roach 9700 17.4 13.8 126 20.4 16.6 123
Windy Peak 7900 10.5 6.9 152 10.3 8.9 116
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Basin Index (%) 130 122
S. PLATTE
Black Mountain 8920 11.2 -M * 12.1 -M *
Crow Creek 8330 5.7 7.0 81 9.6 8.7 110
Deadman Hill 10220 20.0 13.7 146 18.7 14.7 127
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Basin Index (%) 124 121
LITTLE SNAKE RIVER
Battle Mountain 7440 13.4 11.2 120 15.7 13.4 117
Divide Peak 8880 20.4 17.4 117 22.4 18.8 119
Elk River 8700 20.5 17.3 118 18.8 17.7 106
Little Snake River 8915 28.5 20.8 137 36.0 26.2 137
Old Battle 10000 34.6 26.2 132 31.4 31.0 101
Sage Creek Basin 7850 17.6 11.6 152 16.0 12.9 124
Sandstone RS 8150 17.9 11.8 152 18.1 16.5 110
Whiskey Park 8950 30.2 24.1 125 31.5 24.7 128
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Basin Index (%) 130 118
UPPER GREEN RIVER
Big Sandy Opening 9080 12.8 11.4 112 13.5 11.6 116
Blind Bull Sum 8650 21.4 20.3 105 17.0 17.5 97
East Rim Divide 7930 10.3 9.5 108 10.4 10.5 99
Elkhart Park G.S. 9400 11.7 10.5 111 12.4 11.7 106
Gros Ventre Summit 8750 8.9 11.4 78 11.2 11.3 99
Gunsight Pass 9820 12.3 11.9 103 14.0 12.0 117
Indian Creek 9425 20.0 21.0 95 16.0 19.8 81
Kendall R.S. 7740 10.9 11.1 98 11.1 12.8 87
Loomis Park 8240 15.1 13.2 114 15.7 15.4 102
New Fork Lake 8340 9.2 9.2 100 8.6 9.6 90
Pocket Creek 9360 13.2 -M * 13.9 -M *
Snider Basin 8060 10.9 10.9 100 12.5 12.7 98
Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102
Triple Peak 8500 21.2 19.2 110 23.1 22.5 103
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Basin Index (%) 103 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.7 -M * 11.5 -M *
Buck Pasture 9632 13.9 -M * 16.6 -M *
EF Blacks Fork GS 9360 11.2 -M * 9.4 -M *
Hams Fork 7840 10.0 10.2 98 10.2 10.0 102
Hewinta 9500 11.1 9.6 116 12.9 12.2 106
Hickerson Park 9122 8.0 6.6 121 10.0 8.7 115
Hole-in-Rock 9168 6.3 6.5 97 9.3 8.2 113
Indian Creek 9425 20.0 21.0 95 16.0 19.8 81
Kelley R.S. 8180 -M 13.2 * -M 16.0 *
Spirit Lk 10235 14.1 -M * 14.4 -M *
Steel Creek Park 10158 13.8 13.3 104 16.1 14.1 114
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Basin Index (%) 103 102
UPPER BEAR RIVER
Bear River RS 8777 11.3 -M * 13.6 -M *
Bug Lake 7987 21.7 16.5 132 21.1 17.2 123
Burts Miller Ranch 8000 7.7 -M * 7.8 -M *
Chalk Creek #1 9171 23.5 20.8 113 26.0 21.9 119
Hayden Fork 9130 16.9 14.2 119 21.3 18.3 116
Kelley R.S. 8180 -M 13.2 * -M 16.0 *
Lily Lake 9133 11.7 11.4 103 14.7 14.8 99
Monte Cristo 8932 29.4 24.1 122 28.3 22.8 124
Salt River Summit 7640 12.5 11.9 105 14.2 14.8 96
Spring Creek Divide 9000 21.1 20.7 102 21.7 21.2 102
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Basin Index (%) 114 112
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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.