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 SATURDAY: APRIL 27 , 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 14.7 10.4 141 24.2 22.3 109
Black Bear 8170 42.6 37.0 115 48.7 41.1 118
Blind Bull Sum 8650 24.6 24.1 102 21.1 20.8 101
Cottonwood Creek 7670 20.0 16.7 120 29.1 26.8 109
East Rim Divide 7930 4.0 8.8 45 13.5 12.5 108
Grand Targhee 9260 47.8 43.6 110 37.3 33.6 111
Granite Creek 6770 14.0 9.0 156 23.3 20.8 112
Grassy Lake 7265 -M 30.0 * -M 38.5 *
Gros Ventre Summit 8750 7.5 12.1 62 13.7 14.2 96
Gunsight Pass 9820 15.2 13.3 114 17.9 15.5 115
Lewis Lake Divide 7850 36.2 30.7 118 42.9 37.8 113
Phillips Bench 8200 29.8 25.6 116 35.6 30.0 119
Salt River Summit 7640 10.3 8.2 126 18.5 18.0 103
Snake River Station 6920 13.5 9.4 144 28.0 24.2 116
Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102
Thumb Divide 7980 16.0 13.9 115 21.1 20.4 103
Togwotee Pass 9580 25.6 24.6 104 27.8 26.6 105
Two Ocean Plateau 9240 33.5 29.3 114 29.0 29.5 98
Willow Creek 8080 31.0 24.9 124 39.6 36.7 108
Younts Peak 8350 -M 15.1 * -M 17.2 *
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Basin Index (%) 112 109
MADISON-GALLATIN
Black Bear 8170 42.6 37.0 115 48.7 41.1 118
Canyon 7870 13.0 11.5 113 18.2 17.6 103
Madison Plateau 7750 29.5 22.2 133 31.2 28.3 110
West Yellowstone 6700 4.0 4.2 95 18.8 15.6 121
Whiskey Creek 6800 16.8 15.4 109 23.8 21.9 109
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Basin Index (%) 117 113
YELLOWSTONE
Beartooth Lake 9360 24.0 23.4 103 22.4 21.4 105
Burnt Mtn 5880 2.7 .0 * 16.6 15.0 111
Canyon 7870 13.0 11.5 113 18.2 17.6 103
Cole Creek 7850 18.5 16.3 113 -M 15.7 *
Evening Star 9200 28.1 24.6 114 33.1 29.7 111
Fisher Creek 9100 36.4 33.2 110 39.9 34.4 116
Northeast Entrance 7350 4.6 4.6 100 16.6 13.4 124
Parker Peak 9400 27.1 21.8 124 27.2 19.6 139
Sylvan Lake 8420 21.0 20.3 103 30.2 24.5 123
Thumb Divide 7980 16.0 13.9 115 21.1 20.4 103
Two Ocean Plateau 9240 33.5 29.3 114 29.0 29.5 98
White Mill 8700 27.3 23.7 115 23.5 25.7 91
Wolverine 7650 4.9 4.8 102 14.4 13.4 107
Younts Peak 8350 -M 15.1 * -M 17.2 *
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Basin Index (%) 113 110
WIND RIVER
Burroughs Creek 8750 9.4 -M * 15.7 -M *
Castle Creek 8400 .0 -M * 7.9 -M *
Cold Springs 9630 5.2 2.4 217 9.9 11.9 83
Deer Park 9700 16.4 16.3 101 20.8 22.9 91
Hobbs Park 10100 17.0 15.8 108 14.9 16.2 92
Kirwin 9550 10.4 10.2 102 12.5 13.3 94
Little Warm 9370 8.9 9.2 97 10.3 14.7 70
Owl Creek 8975 .5 2.0 25 8.2 7.5 109
South Pass 9040 13.9 15.2 91 14.2 19.8 72
St. Lawrence Alt 8620 -M 4.2 * -M 11.0 *
Togwotee Pass 9580 25.6 24.6 104 27.8 26.6 105
Townsend Creek 8700 9.3 8.4 111 13.3 14.5 92
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Basin Index (%) 103 89
BIGHORN BASIN
Bald Mtn. 9380 17.1 20.6 83 13.8 19.1 72
Bear Trap Meadow 8200 .0 1.6 0 7.6 10.1 75
Bone Springs Div 9350 13.8 16.5 84 13.0 17.6 74
Grave Springs 8550 7.8 9.1 86 10.5 12.3 85
Kirwin 9550 10.4 10.2 102 12.5 13.3 94
Marquette 8760 6.6 -M * 10.8 -M *
Middle Powder 7760 6.4 12.2 52 10.0 13.7 73
Owl Creek 8975 .5 2.0 25 8.2 7.5 109
Powder River Pass 9480 8.6 10.0 86 -M 14.5 *
Shell Creek 9580 14.3 15.9 90 11.7 15.7 75
Timber Creek 7950 .1 3.6 3 7.8 9.3 84
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Basin Index (%) 78 80
SHOSHONE RIVER
Blackwater 9780 27.6 24.7 112 28.1 22.8 123
Evening Star 9200 28.1 24.6 114 33.1 29.7 111
Marquette 8760 6.6 -M * 10.8 -M *
Sylvan Lake 8420 21.0 20.3 103 30.2 24.5 123
Sylvan Road 7120 3.2 7.5 43 17.9 18.1 99
Younts Peak 8350 -M 15.1 * -M 17.2 *
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Basin Index (%) 104 115
POWDER RIVER
Bear Trap Meadow 8200 .0 1.6 0 7.6 10.1 75
Cloud Peak Reservoir 9860 12.3 16.5 75 12.1 16.0 76
Grave Springs 8550 7.8 9.1 86 10.5 12.3 85
Hansen Sawmill 8360 3.7 3.8 97 9.0 10.3 87
Middle Powder 7760 6.4 12.2 52 10.0 13.7 73
Powder River Pass 9480 8.6 10.0 86 -M 14.5 *
Soldier Park 8720 .7 -M * 8.0 -M *
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Basin Index (%) 73 79
TONGUE RIVER
Big Goose 7990 7.1 9.1 78 11.4 13.5 84
Bone Springs Div 9350 13.8 16.5 84 13.0 17.6 74
Burgess Junction 7880 7.6 12.3 62 9.3 14.3 65
Dome Lake 8880 6.5 11.7 56 9.9 15.9 62
Little Goose 8870 8.6 -M * 9.0 -M *
Sucker Creek 8880 9.6 12.5 77 -M 16.7 *
Tie Creek 6870 .7 3.0 23 12.0 13.7 88
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Basin Index (%) 70 74
BELLE FOURCHE
Blind Park 6890 -M 2.7 * 8.7 13.8 63
Cole Canyon 5910 .0 .4 0* 13.5 11.2 121
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Basin Index (%) 0* 89
CHEYENNE RIVER BASIN
Blind Park 6890 -M 2.7 * 8.7 13.8 63
North Rapid Creek 6130 .0 2.7 0 -M 11.8 *
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Basin Index (%) 0 63
UPPER N. PLATTE
Arapaho Ridge 10960 23.7 22.1 107 28.0 25.7 109
Blackhall Mtn 9820 32.2 -M * 35.8 -M *
Columbine 9160 19.0 19.9 95 30.9 27.9 111
Divide Peak 8880 14.8 17.9 83 24.9 23.8 105
Joe Wright 10120 21.1 23.4 90 32.6 29.2 112
Laprele Creek 8375 7.5 7.1 106 15.6 14.6 107
Med Bow 10500 40.8 -M * 38.2 -M *
Never Summer 10280 23.6 21.4 110 20.8 -M *
North French Creek 10130 30.4 32.9 92 32.6 30.0 109
Old Battle 10000 37.9 34.4 110 38.6 38.4 101
Rawah 9020 7.1 7.8 91 18.9 16.8 112
Sage Creek Basin 7850 9.3 1.7 547 17.6 15.8 111
Sand Lake 10050 -M 31.2 * -M 28.4 *
South Brush Creek 8440 2.3 10.0 23 13.4 17.4 77
Tower 10500 50.2 49.7 101 49.3 43.8 113
Webber Springs 9250 23.5 22.0 107 33.0 29.4 112
Whiskey Park 8950 26.9 25.7 105 34.7 30.8 113
Willow Creek Pass 9540 16.5 13.8 120 18.8 15.3 123
Zirkel 9340 27.1 21.9 124 40.4 30.5 132
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Basin Index (%) 103 110
SWEETWATER
Deer Park 9700 16.4 16.3 101 20.8 22.9 91
Larsen Creek 9000 5.0 9.6 52 15.9 -M *
South Pass 9040 13.9 15.2 91 14.2 19.8 72
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Basin Index (%) 86 82
LOWER N. PLATTE
Casper Mtn. 7900 11.9 14.1 84 14.2 17.5 81
Laprele Creek 8375 7.5 7.1 106 15.6 14.6 107
Reno Hill 8400 15.0 13.6 110 19.4 18.3 106
Windy Peak 7900 5.4 5.5 98 12.9 12.6 102
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Basin Index (%) 99 99
LARAMIE RIVER
Brooklyn Lake 10240 24.0 23.0 104 28.3 24.1 117
Cinnabar Park 9574 19.1 20.1 95 25.8 26.4 98
Crow Creek 8330 .0 .0 * 12.1 13.0 93
Deadman Hill 10220 21.3 18.5 115 21.7 20.1 108
Rawah 9020 7.1 7.8 91 18.9 16.8 112
Roach 9700 15.1 17.0 89 23.5 21.7 108
Windy Peak 7900 5.4 5.5 98 12.9 12.6 102
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Basin Index (%) 100 106
S. PLATTE
Black Mountain 8920 9.6 -M * 15.8 -M *
Crow Creek 8330 .0 .0 * 12.1 13.0 93
Deadman Hill 10220 21.3 18.5 115 21.7 20.1 108
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Basin Index (%) 115* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 1.4 1.0 140* 17.4 16.8 104
Divide Peak 8880 14.8 17.9 83 24.9 23.8 105
Elk River 8700 12.0 14.3 84 21.0 22.2 95
Little Snake River 8915 24.3 23.1 105 40.0 32.0 125
Old Battle 10000 37.9 34.4 110 38.6 38.4 101
Sage Creek Basin 7850 9.3 1.7 547 17.6 15.8 111
Sandstone RS 8150 6.9 7.7 90 19.3 20.3 95
Whiskey Park 8950 26.9 25.7 105 34.7 30.8 113
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Basin Index (%) 106 107
UPPER GREEN RIVER
Big Sandy Opening 9080 14.1 11.8 119 16.5 14.8 111
Blind Bull Sum 8650 24.6 24.1 102 21.1 20.8 101
East Rim Divide 7930 4.0 8.8 45 13.5 12.5 108
Elkhart Park G.S. 9400 13.7 11.8 116 15.9 14.6 109
Gros Ventre Summit 8750 7.5 12.1 62 13.7 14.2 96
Gunsight Pass 9820 15.2 13.3 114 17.9 15.5 115
Indian Creek 9425 22.4 23.8 94 20.1 24.4 82
Kendall R.S. 7740 5.9 5.9 100 13.2 15.1 87
Loomis Park 8240 13.1 11.5 114 19.2 18.5 104
New Fork Lake 8340 6.8 7.1 96 11.0 11.7 94
Pocket Creek 9360 14.4 -M * 16.8 -M *
Snider Basin 8060 5.0 10.0 50 14.5 15.2 95
Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102
Triple Peak 8500 21.5 18.8 114 28.7 27.3 105
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Basin Index (%) 97 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.0 -M * 15.2 -M *
Buck Pasture 9632 15.3 -M * 22.8 -M *
EF Blacks Fork GS 9360 9.2 -M * 13.9 -M *
Hams Fork 7840 3.8 4.4 86 13.6 12.7 107
Hewinta 9500 8.5 6.1 139 17.3 15.7 110
Hickerson Park 9122 5.7 5.0 114 13.6 11.7 116
Hole-in-Rock 9168 3.6 4.2 86 12.9 11.2 115
Indian Creek 9425 22.4 23.8 94 20.1 24.4 82
Kelley R.S. 8180 12.3 11.8 104 17.9 19.7 91
Spirit Lk 10235 15.4 -M * 19.2 -M *
Steel Creek Park 10158 17.1 16.7 102 21.7 18.6 117
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Basin Index (%) 102 103
UPPER BEAR RIVER
Bear River RS 8777 5.8 -M * 17.3 -M *
Bug Lake 7987 20.7 16.1 129 26.9 21.1 127
Burts Miller Ranch 8000 -M -M * 10.1 -M *
Chalk Creek #1 9171 25.7 24.7 104 32.8 27.8 118
Hayden Fork 9130 11.8 10.1 117 26.2 23.2 113
Kelley R.S. 8180 12.3 11.8 104 17.9 19.7 91
Lily Lake 9133 11.7 9.7 121 18.6 19.0 98
Monte Cristo 8932 35.4 27.3 130 35.7 28.5 125
Salt River Summit 7640 10.3 8.2 126 18.5 18.0 103
Spring Creek Divide 9000 24.4 24.0 102 26.1 25.6 102
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Basin Index (%) 115 111
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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.