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: MARCH 20 , 2015
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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 7030 14.3 14.7 97 16.2 19.0 85
Black Bear 8170 23.4 32.5 72 23.9 34.5 69
Blind Bull Sum 8650 22.7 20.5 111 15.1 17.6 86
Cottonwood Creek 7670 18.5 19.9 93 22.7 21.9 104
East Rim Divide 7930 11.0 9.6 115 10.2 10.6 96
Grand Targhee 9260 32.0 33.0 97 26.6 27.1 98
Granite Creek 6770 14.5 15.0 97 15.7 18.2 86
Grassy Lake 7265 24.2 29.4 82 25.4 32.7 78
Gros Ventre Summit 8750 9.9 11.6 85 9.1 11.4 80
Gunsight Pass 9820 11.8 12.1 98 11.5 12.1 95
Lewis Lake Divide 7850 20.7 27.7 75 23.7 32.1 74
Phillips Bench 8200 20.7 22.4 92 22.1 25.3 87
Salt River Summit 7760 9.6 12.0 80 12.1 15.0 81
Snake River Station 6920 13.2 15.2 87 16.7 20.4 82
Spring Creek Divide 9000 23.1 21.1 109 22.0 21.5 102
Thumb Divide 7980 9.1 14.1 65 10.5 16.5 64
Togwotee Pass 9580 20.8 20.6 101 22.4 21.8 103
Two Ocean Plateau 9240 22.9 24.0 95 20.7 24.4 85
Willow Creek 8380 20.5 25.4 81 25.0 29.9 84
Younts Peak 8350 -M 13.4 * -M 14.1 *
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Basin Index (%) 90 85
MADISON-GALLATIN
Black Bear 8170 23.4 32.5 72 23.9 34.5 69
Canyon 7870 9.9 11.8 84 10.8 14.6 74
Madison Plateau 7750 13.2 20.1 66 14.2 23.7 60
West Yellowstone 6700 6.2 9.9 63 8.7 12.8 68
Whiskey Creek 6800 8.8 14.2 62 11.0 18.2 60
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Basin Index (%) 69 66
YELLOWSTONE
Beartooth Lake 9360 18.5 19.3 96 17.9 17.7 101
Burnt Mtn 5880 .8 4.6 17 11.0 10.9 101
Canyon 7870 9.9 11.8 84 10.8 14.6 74
Cole Creek 7850 11.6 12.0 97 11.2 10.7 105
Evening Star 9200 22.9 22.2 103 24.3 24.4 100
Fisher Creek 9100 28.3 28.2 100 25.9 28.5 91
Northeast Entrance 7350 7.6 9.0 84 12.3 11.0 112
Parker Peak 9400 19.6 17.6 111 18.8 15.7 120
Sylvan Lake 8420 14.1 18.2 77 17.0 20.0 85
Thumb Divide 7980 9.1 14.1 65 10.5 16.5 64
Two Ocean Plateau 9240 22.9 24.0 95 20.7 24.4 85
White Mill 8700 22.2 19.9 112 21.6 21.2 102
Wolverine 7650 10.6 8.9 119 12.3 11.0 112
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Basin Index (%) 94 95
WIND RIVER
Burroughs Creek 8750 12.2 -M * 15.0 -M *
Castle Creek 8400 7.9 -M * 8.3 -M *
Cold Springs 9630 6.2 6.3 98 7.1 8.6 83
Deer Park 9700 9.2 13.3 69 12.4 17.2 72
Hobbs Park 10100 8.0 11.8 68 8.7 11.1 78
Kirwin 9550 9.5 8.4 113 11.1 10.0 111
Little Warm 9370 8.7 9.2 95 10.3 11.2 92
Owl Creek 8975 4.6 4.6 100 6.3 5.0 126
South Pass 9040 9.3 13.8 67 10.2 15.4 66
St. Lawrence Alt 8620 3.4 6.1 56 5.7 7.5 76
Togwotee Pass 9580 20.8 20.6 101 22.4 21.8 103
Townsend Creek 8700 5.5 8.2 67 8.4 10.1 83
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Basin Index (%) 83 87
BIGHORN BASIN
Bald Mtn. 9380 14.8 16.5 90 11.4 14.9 77
Bear Trap Meadow 8200 7.2 5.1 141 7.2 7.1 101
Bone Springs Div 9350 13.1 14.1 93 11.3 13.4 84
Grave Springs 8550 7.8 8.1 96 6.6 9.0 73
Kirwin 9550 9.5 8.4 113 11.1 10.0 111
Marquette 8760 4.9 -M * 7.1 -M *
Middle Powder 7760 9.4 9.8 96 8.8 10.0 88
Owl Creek 8975 4.6 4.6 100 6.3 5.0 126
Powder River Pass 9480 9.8 9.2 107 11.3 10.8 105
Shell Creek 9580 11.2 12.8 88 10.7 11.9 90
Timber Creek 7950 4.7 4.2 112 7.3 6.1 120
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Basin Index (%) 99 94
SHOSHONE RIVER
Blackwater 9780 17.7 20.8 85 18.4 18.1 102
Evening Star 9200 22.9 22.2 103 24.3 24.4 100
Marquette 8760 4.9 -M * 7.1 -M *
Sylvan Road 7120 8.2 10.4 79 13.8 15.1 91
Younts Peak 8350 -M 13.4 * -M 14.1 *
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Basin Index (%) 91 98
POWDER RIVER
Bear Trap Meadow 8200 7.2 5.1 141 7.2 7.1 101
Cloud Peak Reservoir 9860 12.0 12.9 93 11.2 11.2 100
Grave Springs 8550 7.8 8.1 96 6.6 9.0 73
Hansen Sawmill 8360 6.4 5.7 112 7.5 7.1 106
Middle Powder 7760 9.4 9.8 96 8.8 10.0 88
Powder River Pass 9480 9.8 9.2 107 11.3 10.8 105
Soldier Park 8720 4.7 -M * 7.0 -M *
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Basin Index (%) 104 95
TONGUE RIVER
Big Goose 7990 7.3 7.8 94 8.3 9.2 90
Bone Springs Div 9350 13.1 14.1 93 11.3 13.4 84
Burgess Junction 7880 9.5 9.5 100 9.7 10.5 92
Dome Lake 8880 9.6 10.2 94 9.1 11.5 79
Little Goose 8870 7.6 -M * 9.9 -M *
Sucker Creek 8880 10.3 10.9 94 10.9 12.2 89
Tie Creek 6870 3.3 5.0 66 9.2 9.8 94
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Basin Index (%) 92 88
BELLE FOURCHE
Cole Canyon 5910 1.6 5.5 29 6.9 7.9 87
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Basin Index (%) 29 87
CHEYENNE RIVER BASIN
Blind Park 6890 2.3 7.2 32 7.7 10.5 73
North Rapid Creek 6130 4.9 6.5 75 8.3 8.6 97
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Basin Index (%) 53 84
UPPER N. PLATTE
Arapaho Ridge 10960 16.0 18.0 89 16.9 19.7 86
Blackhall Mtn 9820 20.9 -M * 23.3 -M *
Columbine 9160 17.1 22.0 78 19.7 22.9 86
Divide Peak 8880 6.6 17.6 38 11.8 19.1 62
Joe Wright 10120 15.8 19.1 83 22.7 22.9 99
Laprele Creek 8375 6.8 9.1 75 7.5 10.8 69
Med Bow 10500 27.0 -M * 24.2 -M *
North French Creek 10130 20.3 25.2 81 20.3 23.7 86
Never Summer 10280 14.9 17.8 84 14.2 -M *
Old Battle 10000 20.3 26.3 77 20.9 31.4 67
Rawah 9020 8.6 9.4 91 13.2 12.2 108
Sage Creek Basin 7850 6.4 11.5 56 -M 12.9 *
Sand Lake 10050 19.8 24.6 80 18.4 21.7 85
South Brush Creek 8440 7.0 11.1 63 9.1 13.3 68
Tower 10500 28.7 40.0 72 31.6 35.8 88
Webber Springs 9250 15.7 21.0 75 17.1 23.9 72
Willow Creek Pass 9540 8.9 10.9 82 10.8 11.7 92
Zirkel 9340 22.8 25.7 89 25.9 25.5 102
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Basin Index (%) 76 83
SWEETWATER
Deer Park 9700 9.2 13.3 69 12.4 17.2 72
Larsen Creek 9000 6.2 11.2 55 9.0 -M *
South Pass 9040 9.3 13.8 67 10.2 15.4 66
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Basin Index (%) 64 69
LOWER N. PLATTE
Casper Mtn. 7900 8.0 12.2 66 8.6 12.8 67
Laprele Creek 8375 6.8 9.1 75 7.5 10.8 69
Reno Hill 8400 9.3 11.9 78 10.8 13.0 83
Windy Peak 7900 5.3 7.1 75 6.3 9.1 69
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Basin Index (%) 73 73
LARAMIE RIVER
Brooklyn Lake 10240 16.5 17.7 93 18.3 18.5 99
Cinnabar Park 9574 13.6 18.0 76 18.6 21.4 87
Crow Creek 8330 4.1 6.9 59 7.9 8.9 89
Deadman Hill 10220 14.4 13.9 104 14.3 15.0 95
Rawah 9020 8.6 9.4 91 13.2 12.2 108
Roach 9700 10.5 14.0 75 13.3 16.9 79
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Basin Index (%) 85 92
S. PLATTE
Black Mountain 8920 8.1 -M * 10.3 -M *
Crow Creek 8330 4.1 6.9 59 7.9 8.9 89
Deadman Hill 10220 14.4 13.9 104 14.3 15.0 95
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Basin Index (%) 89 93
LITTLE SNAKE RIVER
Battle Mountain 7440 5.6 11.4 49 9.3 13.6 68
Divide Peak 8880 6.6 17.6 38 11.8 19.1 62
Elk River 8700 12.8 17.4 74 13.6 18.0 76
Little Snake River 8915 18.7 21.1 89 23.2 26.5 88
Old Battle 10000 20.3 26.3 77 20.9 31.4 67
Sage Creek Basin 7850 6.4 11.5 56 -M 12.9 *
Sandstone RS 8150 6.0 12.2 49 -M 16.7 *
Whiskey Park 8950 21.2 24.3 87 21.9 25.0 88
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Basin Index (%) 69 75
UPPER GREEN RIVER
Big Sandy Opening 9080 9.5 11.7 81 8.8 11.8 75
Blind Bull Sum 8650 22.7 20.5 111 15.1 17.6 86
East Rim Divide 7930 11.0 9.6 115 10.2 10.6 96
Elkhart Park G.S. 9400 9.7 10.7 91 10.2 11.8 86
Gros Ventre Summit 8750 9.9 11.6 85 9.1 11.4 80
Gunsight Pass 9820 11.8 12.1 98 11.5 12.1 95
Kendall R.S. 7740 10.9 11.3 96 10.7 13.0 82
Loomis Park 8240 13.2 13.3 99 14.6 15.6 94
New Fork Lake 8340 9.8 9.3 105 9.7 9.7 100
Pocket Creek 9360 6.9 -M * -M -M *
Snider Basin 8060 12.0 11.0 109 13.5 12.8 105
Spring Creek Divide 9000 23.1 21.1 109 22.0 21.5 102
Triple Peak 8500 22.0 19.5 113 23.3 22.7 103
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Basin Index (%) 102 93
LOWER GREEN RIVER
Blacks Fork Jct 8870 5.5 -M * 8.3 -M *
Buck Pasture 9700 9.7 -M * 11.7 -M *
EF Blacks Fork GS 9360 5.6 -M * 7.9 -M *
Hams Fork 7840 8.1 10.3 79 8.1 10.2 79
Hewinta 9519 5.9 9.9 60 9.0 12.4 73
Hickerson Park 9145 3.9 6.6 59 5.9 8.9 66
Hole-in-Rock 9150 4.5 6.6 68 6.1 8.3 73
Indian Creek 9425 16.9 21.3 79 16.6 20.2 82
Kelley R.S. 8180 11.3 13.4 84 12.5 16.2 77
Spirit Lk 10235 6.4 -M * 9.2 -M *
Steel Creek Park 10200 10.0 13.4 75 10.8 14.3 76
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Basin Index (%) 74 76
UPPER BEAR RIVER
Bear River RS 8777 3.6 -M * 7.0 -M *
Bug Lake 7950 10.7 16.7 64 11.1 17.4 64
Burts Miller Ranch 8000 2.0 -M * 3.7 -M *
Chalk Creek #1 8993 13.0 21.2 61 14.2 22.2 64
Hayden Fork 9212 4.1 14.3 29 12.9 18.6 69
Kelley R.S. 8180 11.3 13.4 84 12.5 16.2 77
Lily Lake 9156 7.4 11.4 65 8.5 15.0 57
Monte Cristo 8960 16.2 24.4 66 16.0 23.1 69
Salt River Summit 7760 9.6 12.0 80 12.1 15.0 81
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Basin Index (%) 64 68
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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.