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: FEBRUARY 25 , 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 15.0 13.2 114 17.1 16.9 101
Black Bear 8170 30.8 28.7 107 31.5 30.1 105
Blind Bull Sum 8650 -M 17.4 * -M 15.7 *
Cottonwood Creek 7670 -M 16.2 * -M 19.1 *
East Rim Divide 7930 -M 7.7 * -M 9.4 *
Grand Targhee 9260 34.4 28.9 119 26.2 24.3 108
Granite Creek 6770 14.9 13.3 112 16.2 16.1 101
Grassy Lake 7265 -M 25.4 * -M 29.0 *
Gros Ventre Summit 8750 -M 9.4 * -M 9.9 *
Gunsight Pass 9820 -M 10.3 * -M 10.6 *
Lewis Lake Divide 7850 -M 25.0 * -M 28.3 *
Phillips Bench 8200 -M 19.2 * -M 22.3 *
Salt River Summit 7640 -M 10.3 * -M 13.2 *
Snake River Station 6920 -M 13.9 * -M 18.3 *
Spring Creek Divide 9000 -M 17.8 * -M 18.9 *
Thumb Divide 7980 -M 11.7 * -M 14.3 *
Togwotee Pass 9580 -M 17.3 * -M 19.0 *
Two Ocean Plateau 9240 22.0 21.2 104 18.2 21.2 86
Willow Creek 8080 -M 21.8 * -M 26.3 *
Younts Peak 8350 -M 11.4 * -M 12.4 *
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Basin Index (%) 111* 101*
MADISON-GALLATIN
Black Bear 8170 30.8 28.7 107 31.5 30.1 105
Canyon 7870 10.2 10.2 100 12.0 12.8 94
Madison Plateau 7750 19.7 17.4 113 20.0 20.7 97
West Yellowstone 6700 10.7 8.6 124 -M 11.3 *
Whiskey Creek 6800 13.8 11.7 118 14.4 15.9 91
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Basin Index (%) 111 98
YELLOWSTONE
Beartooth Lake 9360 13.8 16.1 86 12.6 15.4 82
Burnt Mtn 5880 5.9 4.0 148 10.0 9.1 110
Canyon 7870 10.2 10.2 100 12.0 12.8 94
Cole Creek 7850 11.6 9.2 126 -M 8.8 *
Evening Star 9200 19.3 18.8 103 21.9 21.7 101
Fisher Creek 9100 21.9 25.1 87 25.2 25.0 101
Northeast Entrance 7350 8.3 7.8 106 10.5 9.7 108
Parker Peak 9400 17.4 15.5 112 17.8 13.7 130
Sylvan Lake 8420 15.6 15.5 101 20.8 17.6 118
Thumb Divide 7980 -M 11.7 * -M 14.3 *
Two Ocean Plateau 9240 22.0 21.2 104 18.2 21.2 86
White Mill 8700 15.9 17.9 89 14.0 18.6 75
Wolverine 7650 9.1 8.4 108 9.6 9.7 99
Younts Peak 8350 -M 11.4 * -M 12.4 *
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Basin Index (%) 101 99
WIND RIVER
Burroughs Creek 8750 -M -M * -M -M *
Castle Creek 8400 3.4 -M * 4.8 -M *
Cold Springs 9630 5.4 5.4 100 5.7 7.3 78
Deer Park 9700 13.0 10.6 123 13.9 14.8 94
Hobbs Park 10100 10.8 9.3 116 8.3 9.2 90
Kirwin 9550 7.4 6.7 110 7.5 8.6 87
Little Warm 9370 6.6 7.7 86 6.4 9.6 67
Owl Creek 8975 4.2 3.8 111 4.9 4.2 117
South Pass 9040 -M 11.0 * -M 13.1 *
St. Lawrence Alt 8620 3.7 5.0 74 6.8 6.3 108
Togwotee Pass 9580 -M 17.3 * -M 19.0 *
Townsend Creek 8700 7.3 6.2 118 8.1 8.4 96
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Basin Index (%) 107 90
BIGHORN BASIN
Bald Mtn. 9380 14.3 14.2 101 10.0 12.6 79
Bear Trap Meadow 8200 6.7 4.2 160 5.8 6.0 97
Bone Springs Div 9350 10.6 11.5 92 9.0 11.4 79
Grave Springs 8550 5.9 6.4 92 7.3 7.6 96
Kirwin 9550 7.4 6.7 110 7.5 8.6 87
Marquette 8760 5.9 -M * 7.3 -M *
Middle Powder 7760 7.2 7.7 94 4.1 8.5 48
Owl Creek 8975 4.2 3.8 111 4.9 4.2 117
Powder River Pass 9480 8.3 7.7 108 7.7 9.3 83
Shell Creek 9580 11.1 11.0 101 9.5 10.3 92
Timber Creek 7950 3.0 3.1 97 4.8 5.1 94
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Basin Index (%) 103 84
SHOSHONE RIVER
Blackwater 9780 16.9 16.8 101 17.5 15.8 111
Evening Star 9200 19.3 18.8 103 21.9 21.7 101
Marquette 8760 5.9 -M * 7.3 -M *
Sylvan Lake 8420 15.6 15.5 101 20.8 17.6 118
Sylvan Road 7120 9.1 9.0 101 12.2 13.6 90
Younts Peak 8350 -M 11.4 * -M 12.4 *
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Basin Index (%) 101 105
POWDER RIVER
Bear Trap Meadow 8200 6.7 4.2 160 5.8 6.0 97
Cloud Peak Reservoir 9860 9.3 10.1 92 8.2 9.3 88
Grave Springs 8550 5.9 6.4 92 7.3 7.6 96
Hansen Sawmill 8360 4.4 4.5 98 5.9 5.9 100
Middle Powder 7760 7.2 7.7 94 4.1 8.5 48
Powder River Pass 9480 8.3 7.7 108 7.7 9.3 83
Soldier Park 8720 3.2 -M * 5.4 -M *
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Basin Index (%) 103 84
TONGUE RIVER
Big Goose 7990 5.9 6.0 98 8.0 7.6 105
Bone Springs Div 9350 10.6 11.5 92 9.0 11.4 79
Burgess Junction 7880 6.4 8.0 80 6.9 8.7 79
Dome Lake 8880 6.5 8.4 77 6.2 9.7 64
Little Goose 8870 7.2 -M * 6.1 -M *
Sucker Creek 8880 8.5 8.6 99 7.7 10.2 75
Tie Creek 6870 3.3 4.2 79 7.1 8.0 89
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Basin Index (%) 88 81
BELLE FOURCHE
Blind Park 6890 6.9 6.2 111 6.2 9.1 68
Cole Canyon 5910 5.2 4.9 106 8.8 6.9 128
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Basin Index (%) 109 94
CHEYENNE RIVER BASIN
Blind Park 6890 6.9 6.2 111 6.2 9.1 68
North Rapid Creek 6130 5.5 5.8 95 5.5 7.3 75
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Basin Index (%) 103 71
UPPER N. PLATTE
Arapaho Ridge 10960 18.4 16.0 115 18.8 17.2 109
Blackhall Mtn 9820 23.2 -M * 24.9 -M *
Columbine 9160 21.2 19.2 110 21.6 19.8 109
Divide Peak 8880 15.1 15.2 99 17.9 16.5 108
Joe Wright 10120 14.9 15.9 94 22.3 19.4 115
Laprele Creek 8375 9.0 7.5 120 9.8 9.1 108
Med Bow 10500 27.5 -M * 25.8 -M *
Never Summer 10280 15.8 15.6 101 13.8 -M *
North French Creek 10130 21.8 20.4 107 22.7 20.4 111
Old Battle 10000 26.7 23.5 114 27.6 27.2 101
Rawah 9020 9.0 8.3 108 11.8 10.5 112
Sage Creek Basin 7850 14.0 10.4 135 13.8 11.5 120
Sand Lake 10050 20.5 20.5 100 17.1 18.4 93
South Brush Creek 8440 8.0 9.8 82 8.9 11.4 78
Tower 10500 38.8 35.4 110 34.2 31.0 110
Webber Springs 9250 18.9 18.2 104 22.8 20.6 111
Whiskey Park 8950 -M 20.7 * -M 21.9 *
Willow Creek Pass 9540 10.8 9.2 117 12.5 10.0 125
Zirkel 9340 23.9 22.5 106 28.0 22.8 123
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Basin Index (%) 107 109
SWEETWATER
Deer Park 9700 13.0 10.6 123 13.9 14.8 94
Larsen Creek 9000 9.1 9.2 99 12.0 -M *
South Pass 9040 -M 11.0 * -M 13.1 *
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Basin Index (%) 112 94*
LOWER N. PLATTE
Casper Mtn. 7900 10.8 9.7 111 9.0 10.8 83
Laprele Creek 8375 9.0 7.5 120 9.8 9.1 108
Reno Hill 8400 11.2 9.5 118 11.9 10.8 110
Windy Peak 7900 7.0 5.6 125 7.2 7.6 95
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Basin Index (%) 118 99
LARAMIE RIVER
Brooklyn Lake 10240 16.9 14.6 116 18.4 15.6 118
Cinnabar Park 9574 15.5 16.6 93 18.0 19.2 94
Crow Creek 8330 3.2 6.6 48 6.8 7.6 89
Deadman Hill 10220 13.8 12.2 113 12.9 12.4 104
Rawah 9020 9.0 8.3 108 11.8 10.5 112
Roach 9700 11.9 12.1 98 14.6 14.3 102
Windy Peak 7900 7.0 5.6 125 7.2 7.6 95
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Basin Index (%) 102 103
S. PLATTE
Black Mountain 8920 7.3 -M * 8.1 -M *
Crow Creek 8330 3.2 6.6 48 6.8 7.6 89
Deadman Hill 10220 13.8 12.2 113 12.9 12.4 104
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Basin Index (%) 90 98
LITTLE SNAKE RIVER
Battle Mountain 7440 10.4 9.5 109 12.6 11.8 107
Divide Peak 8880 15.1 15.2 99 17.9 16.5 108
Elk River 8700 14.7 14.7 100 14.2 15.6 91
Little Snake River 8915 -M 19.4 * -M 24.4 *
Old Battle 10000 26.7 23.5 114 27.6 27.2 101
Sage Creek Basin 7850 14.0 10.4 135 13.8 11.5 120
Sandstone RS 8150 12.8 10.3 124 14.0 14.7 95
Whiskey Park 8950 -M 20.7 * -M 21.9 *
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Basin Index (%) 112 103
UPPER GREEN RIVER
Big Sandy Opening 9080 10.9 9.7 112 11.8 10.2 116
Blind Bull Sum 8650 -M 17.4 * -M 15.7 *
East Rim Divide 7930 -M 7.7 * -M 9.4 *
Elkhart Park G.S. 9400 9.2 9.2 100 10.3 10.3 100
Gros Ventre Summit 8750 -M 9.4 * -M 9.9 *
Gunsight Pass 9820 -M 10.3 * -M 10.6 *
Indian Creek 9425 16.8 18.2 92 13.7 17.4 79
Kendall R.S. 7740 8.9 9.6 93 9.5 11.4 83
Loomis Park 8240 -M 11.4 * -M 13.8 *
New Fork Lake 8340 7.7 7.9 97 7.3 8.6 85
Pocket Creek 9360 -M -M * -M -M *
Snyder Basin 8060 -M 9.3 * -M 11.3 *
Spring Creek Divide 9000 -M 17.8 * -M 18.9 *
Triple Peak 8500 -M 16.4 * -M 19.8 *
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Basin Index (%) 98* 91*
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.6 -M * 9.6 -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 9.1 -M * 7.9 -M *
Hams Fork 7840 8.2 8.9 92 8.7 9.0 97
Hewinta 9500 -M 7.6 * -M 10.5 *
Hickerson Park 9122 6.2 5.6 111 8.2 7.4 111
Hole-in-Rock 9168 4.7 5.4 87 7.7 6.9 112
Indian Creek 9425 16.8 18.2 92 13.7 17.4 79
Kelley R.S. 8180 -M 11.6 * -M 14.3 *
Spirit Lk 10235 -M -M * -M -M *
Steel Creek Park 10158 11.4 11.1 103 13.5 12.0 112
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Basin Index (%) 96* 98*
UPPER BEAR RIVER
Bear River RS 8777 8.2 -M * 11.3 -M *
Bug Lake 7987 17.2 14.3 120 17.9 15.1 119
Burts Miller Ranch 8000 5.2 -M * 6.6 -M *
Chalk Creek #1 9171 18.8 17.7 106 21.8 19.0 115
Hayden Fork 9130 13.3 11.6 115 18.4 16.0 115
Kelley R.S. 8180 -M 11.6 * -M 14.3 *
Lily Lake 9133 9.4 9.9 95 12.5 12.9 97
Monte Cristo 8932 23.7 20.0 118 23.6 20.0 118
Salt River Summit 7640 -M 10.3 * -M 13.2 *
Spring Creek Divide 9000 -M 17.8 * -M 18.9 *
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Basin Index (%) 112 113
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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.
