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: APRIL 29 , 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 14.2 10.0 142 24.0 22.6 106
Black Bear 8170 42.4 37.3 114 48.5 41.4 117
Blind Bull Sum 8650 24.4 23.7 103 21.1 21.1 100
Cottonwood Creek 7670 19.1 16.0 119 29.0 27.1 107
East Rim Divide 7930 2.4 8.4 29 13.4 12.7 106
Grand Targhee 9260 47.7 44.1 108 37.1 34.1 109
Granite Creek 6770 13.2 8.6 153 23.2 21.1 110
Grassy Lake 7265 -M 29.7 * -M 38.9 *
Gros Ventre Summit 8750 5.9 11.8 50 13.7 14.4 95
Gunsight Pass 9820 15.1 13.0 116 17.8 15.9 112
Lewis Lake Divide 7850 35.5 30.4 117 42.7 38.2 112
Phillips Bench 8200 28.9 25.6 113 35.7 30.3 118
Salt River Summit 7640 9.5 8.1 117 18.4 18.2 101
Snake River Station 6920 13.5 8.4 161 27.9 24.5 114
Spring Creek Divide 9000 24.1 24.3 99 25.9 25.9 100
Thumb Divide 7980 15.6 13.3 117 21.1 20.7 102
Togwotee Pass 9580 25.7 24.7 104 28.0 27.0 104
Two Ocean Plateau 9240 33.6 29.6 114 29.0 29.8 97
Willow Creek 8080 30.0 24.1 124 39.5 37.1 106
Younts Peak 8350 -M 15.3 * -M 17.4 *
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Basin Index (%) 111 107
MADISON-GALLATIN
Black Bear 8170 42.4 37.3 114 48.5 41.4 117
Canyon 7870 12.6 11.0 115 18.1 17.8 102
Madison Plateau 7750 29.2 21.9 133 31.1 28.7 108
West Yellowstone 6700 2.8 3.1 90 18.7 15.8 118
Whiskey Creek 6800 16.5 15.1 109 23.8 22.1 108
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Basin Index (%) 117 111
YELLOWSTONE
Beartooth Lake 9360 24.0 23.1 104 22.4 21.7 103
Burnt Mtn 5880 2.7 .0 * 17.5 15.4 114
Canyon 7870 12.6 11.0 115 18.1 17.8 102
Cole Creek 7850 19.3 16.4 118 -M 16.0 *
Evening Star 9200 28.3 24.8 114 33.1 30.1 110
Fisher Creek 9100 36.3 33.0 110 40.0 34.8 115
Northeast Entrance 7350 4.3 4.0 108 16.6 13.6 122
Parker Peak 9400 26.9 21.5 125 27.2 19.8 137
Sylvan Lake 8420 20.9 20.2 103 30.3 24.7 123
Thumb Divide 7980 15.6 13.3 117 21.1 20.7 102
Two Ocean Plateau 9240 33.6 29.6 114 29.0 29.8 97
White Mill 8700 27.3 23.8 115 23.6 26.0 91
Wolverine 7650 4.1 3.6 114 14.2 13.6 104
Younts Peak 8350 -M 15.3 * -M 17.4 *
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Basin Index (%) 114 109
WIND RIVER
Burroughs Creek 8750 8.8 -M * 15.4 -M *
Castle Creek 8400 .0 -M * 7.8 -M *
Cold Springs 9630 4.1 1.7 241 9.9 12.1 82
Deer Park 9700 15.3 16.2 94 20.7 23.1 90
Hobbs Park 10100 16.5 15.9 104 14.8 16.4 90
Kirwin 9550 9.7 10.3 94 12.4 13.5 92
Little Warm 9370 8.6 9.0 96 9.5 15.1 63
Owl Creek 8975 .0 1.4 0 8.1 7.7 105
South Pass 9040 13.1 15.1 87 14.0 20.1 70
St. Lawrence Alt 8620 -M 3.4 * -M 11.3 *
Togwotee Pass 9580 25.7 24.7 104 28.0 27.0 104
Townsend Creek 8700 8.5 8.0 106 13.2 14.7 90
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Basin Index (%) 99 87
BIGHORN BASIN
Bald Mtn. 9380 17.1 20.5 83 13.5 19.4 70
Bear Trap Meadow 8200 .0 1.3 0 7.6 10.3 74
Bone Springs Div 9350 14.1 16.5 85 13.0 17.9 73
Grave Springs 8550 7.4 9.3 80 10.4 12.5 83
Kirwin 9550 9.7 10.3 94 12.4 13.5 92
Marquette 8760 6.1 -M * 10.7 -M *
Middle Powder 7760 6.4 11.9 54 10.4 13.9 75
Owl Creek 8975 .0 1.4 0 8.1 7.7 105
Powder River Pass 9480 8.4 9.7 87 -M 14.8 *
Shell Creek 9580 14.4 16.0 90 11.9 16.0 74
Timber Creek 7950 .0 3.4 0 7.9 9.7 81
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Basin Index (%) 77 79
SHOSHONE RIVER
Blackwater 9780 27.8 25.0 111 28.1 23.1 122
Evening Star 9200 28.3 24.8 114 33.1 30.1 110
Marquette 8760 6.1 -M * 10.7 -M *
Sylvan Lake 8420 20.9 20.2 103 30.3 24.7 123
Sylvan Road 7120 2.3 6.7 34 17.9 18.4 97
Younts Peak 8350 -M 15.3 * -M 17.4 *
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Basin Index (%) 103 114
POWDER RIVER
Bear Trap Meadow 8200 .0 1.3 0 7.6 10.3 74
Cloud Peak Reservoir 9860 12.3 16.5 75 11.9 16.2 73
Grave Springs 8550 7.4 9.3 80 10.4 12.5 83
Hansen Sawmill 8360 3.0 3.3 91 9.0 10.6 85
Middle Powder 7760 6.4 11.9 54 10.4 13.9 75
Powder River Pass 9480 8.4 9.7 87 -M 14.8 *
Soldier Park 8720 .0 -M * 7.9 -M *
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Basin Index (%) 72 78
TONGUE RIVER
Big Goose 7990 7.1 9.2 77 11.4 13.7 83
Bone Springs Div 9350 14.1 16.5 85 13.0 17.9 73
Burgess Junction 7880 7.7 12.1 64 9.5 14.5 66
Dome Lake 8880 6.2 11.6 53 10.1 16.1 63
Little Goose 8870 8.7 -M * 9.1 -M *
Sucker Creek 8880 9.5 12.4 77 11.1 17.0 65
Tie Creek 6870 .0 2.8 0 11.9 13.9 86
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Basin Index (%) 69 72
BELLE FOURCHE
Blind Park 6890 -M 1.8 * 8.7 14.0 62
Cole Canyon 5910 .0 .3 0* 13.5 11.5 117
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Basin Index (%) 0* 87
CHEYENNE RIVER BASIN
Blind Park 6890 -M 1.8 * 8.7 14.0 62
North Rapid Creek 6130 .0 1.8 0 -M 11.9 *
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Basin Index (%) 0 62
UPPER N. PLATTE
Arapaho Ridge 10960 24.0 22.3 108 27.9 25.9 108
Blackhall Mtn 9820 31.6 -M * 35.7 -M *
Columbine 9160 16.8 19.1 88 30.8 28.2 109
Divide Peak 8880 13.3 18.0 74 24.8 24.0 103
Joe Wright 10120 20.9 23.5 89 32.6 29.5 111
Laprele Creek 8375 6.5 6.7 97 15.6 14.8 105
Med Bow 10500 40.2 -M * 38.3 -M *
Never Summer 10280 23.4 21.6 108 21.0 -M *
North French Creek 10130 29.9 33.0 91 32.6 30.4 107
Old Battle 10000 38.0 34.6 110 38.7 38.8 100
Rawah 9020 6.9 7.0 99 18.9 17.0 111
Sage Creek Basin 7850 8.5 1.2 708* 17.4 16.0 109
Sand Lake 10050 -M 31.3 * -M 28.7 *
South Brush Creek 8440 .8 9.8 8 13.3 17.6 76
Tower 10500 50.3 49.8 101 49.5 44.3 112
Webber Springs 9250 22.8 22.0 104 32.9 29.7 111
Whiskey Park 8950 26.0 26.1 100 34.6 31.1 111
Willow Creek Pass 9540 16.5 13.9 119 19.3 15.5 125
Zirkel 9340 26.0 21.4 121 40.5 30.7 132
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Basin Index (%) 100 109
SWEETWATER
Deer Park 9700 15.3 16.2 94 20.7 23.1 90
Larsen Creek 9000 3.4 9.4 36 15.7 -M *
South Pass 9040 13.1 15.1 87 14.0 20.1 70
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Basin Index (%) 78 80
LOWER N. PLATTE
Casper Mtn. 7900 11.5 14.0 82 14.3 17.7 81
Laprele Creek 8375 6.5 6.7 97 15.6 14.8 105
Reno Hill 8400 14.8 13.1 113 19.5 18.6 105
Windy Peak 7900 4.4 4.7 94 12.7 12.8 99
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Basin Index (%) 97 97
LARAMIE RIVER
Brooklyn Lake 10240 23.1 23.2 100 28.4 24.4 116
Cinnabar Park 9574 18.3 19.9 92 25.8 26.8 96
Crow Creek 8330 .0 .0 * 12.0 13.3 90
Deadman Hill 10220 21.7 18.8 115 22.0 20.4 108
Rawah 9020 6.9 7.0 99 18.9 17.0 111
Roach 9700 14.6 17.3 84 23.7 22.0 108
Windy Peak 7900 4.4 4.7 94 12.7 12.8 99
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Basin Index (%) 98 105
S. PLATTE
Black Mountain 8920 8.7 -M * 15.8 -M *
Crow Creek 8330 .0 .0 * 12.0 13.3 90
Deadman Hill 10220 21.7 18.8 115 22.0 20.4 108
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Basin Index (%) 115* 101
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 17.5 17.0 103
Divide Peak 8880 13.3 18.0 74 24.8 24.0 103
Elk River 8700 11.6 13.8 84 21.0 22.4 94
Little Snake River 8915 23.7 22.7 104 39.9 32.4 123
Old Battle 10000 38.0 34.6 110 38.7 38.8 100
Sage Creek Basin 7850 8.5 1.2 708* 17.4 16.0 109
Sandstone RS 8150 6.0 6.7 90 19.2 20.6 93
Whiskey Park 8950 26.0 26.1 100 34.6 31.1 111
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Basin Index (%) 103 105
UPPER GREEN RIVER
Big Sandy Opening 9080 13.1 11.3 116 16.4 15.0 109
Blind Bull Sum 8650 24.4 23.7 103 21.1 21.1 100
East Rim Divide 7930 2.4 8.4 29 13.4 12.7 106
Elkhart Park G.S. 9400 13.4 11.6 116 15.8 14.8 107
Gros Ventre Summit 8750 5.9 11.8 50 13.7 14.4 95
Gunsight Pass 9820 15.1 13.0 116 17.8 15.9 112
Indian Creek 9425 21.5 23.5 91 19.9 24.7 81
Kendall R.S. 7740 4.7 5.2 90 13.1 15.4 85
Loomis Park 8240 12.8 11.3 113 19.1 18.7 102
New Fork Lake 8340 6.1 6.8 90 11.0 11.9 92
Pocket Creek 9360 13.7 -M * 16.6 -M *
Snider Basin 8060 3.6 9.7 37 14.3 15.4 93
Spring Creek Divide 9000 24.1 24.3 99 25.9 25.9 100
Triple Peak 8500 20.7 18.2 114 28.5 27.6 103
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Basin Index (%) 94 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.6 -M * 15.2 -M *
Buck Pasture 9632 14.3 -M * 22.9 -M *
EF Blacks Fork GS 9360 7.5 -M * 13.9 -M *
Hams Fork 7840 2.3 3.7 62 13.7 12.9 106
Hewinta 9500 6.8 5.3 128 17.1 15.9 108
Hickerson Park 9122 4.0 4.7 85 13.4 11.8 114
Hole-in-Rock 9168 1.7 3.3 52 12.7 11.3 112
Indian Creek 9425 21.5 23.5 91 19.9 24.7 81
Kelley R.S. 8180 11.8 11.8 100 17.8 19.9 89
Spirit Lk 10235 14.5 -M * 19.1 -M *
Steel Creek Park 10158 17.6 16.9 104 21.7 18.8 115
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Basin Index (%) 95 101
UPPER BEAR RIVER
Bear River RS 8777 4.2 -M * 17.3 -M *
Bug Lake 7987 19.9 15.7 127 26.8 21.4 125
Burts Miller Ranch 8000 -M -M * 10.0 -M *
Chalk Creek #1 9171 24.2 24.6 98 32.7 28.1 116
Hayden Fork 9130 11.0 9.7 113 26.1 23.5 111
Kelley R.S. 8180 11.8 11.8 100 17.8 19.9 89
Lily Lake 9133 10.6 9.8 108 18.6 19.3 96
Monte Cristo 8932 33.8 27.1 125 35.7 28.9 124
Salt River Summit 7640 9.5 8.1 117 18.4 18.2 101
Spring Creek Divide 9000 24.1 24.3 99 25.9 25.9 100
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Basin Index (%) 111 109
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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.
