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 SUNDAY: APRIL 28 , 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 13.9 10.2 136 24.2 22.4 108
Black Bear 8170 42.6 37.1 115 48.7 41.2 118
Blind Bull Sum 8650 24.6 23.9 103 21.1 20.9 101
Cottonwood Creek 7670 19.4 16.4 118 29.2 26.9 109
East Rim Divide 7930 3.2 8.6 37 13.6 12.6 108
Grand Targhee 9260 -M 43.8 * -M 33.9 *
Granite Creek 6770 13.5 8.8 153 23.3 20.9 111
Grassy Lake 7265 -M 29.9 * -M 38.7 *
Gros Ventre Summit 8750 7.1 12.0 59 13.8 14.3 97
Gunsight Pass 9820 -M 13.2 * -M 15.7 *
Lewis Lake Divide 7850 -M 30.5 * -M 38.0 *
Phillips Bench 8200 -M 25.6 * -M 30.2 *
Salt River Summit 7640 -M 8.2 * -M 18.1 *
Snake River Station 6920 -M 8.9 * -M 24.3 *
Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101
Thumb Divide 7980 15.4 13.7 112 21.1 20.6 102
Togwotee Pass 9580 25.4 24.7 103 27.9 26.8 104
Two Ocean Plateau 9240 33.7 29.4 115 29.0 29.6 98
Willow Creek 8080 30.4 24.5 124 39.5 36.9 107
Younts Peak 8350 -M 15.2 * -M 17.3 *
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Basin Index (%) 108 106
MADISON-GALLATIN
Black Bear 8170 42.6 37.1 115 48.7 41.2 118
Canyon 7870 12.7 11.3 112 18.2 17.7 103
Madison Plateau 7750 29.1 22.1 132 31.2 28.4 110
West Yellowstone 6700 2.9 3.7 78 18.9 15.6 121
Whiskey Creek 6800 16.4 15.2 108 23.8 22.0 108
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Basin Index (%) 116 113
YELLOWSTONE
Beartooth Lake 9360 24.1 23.2 104 22.5 21.6 104
Burnt Mtn 5880 2.6 .0 * 17.1 15.2 112
Canyon 7870 12.7 11.3 112 18.2 17.7 103
Cole Creek 7850 19.1 16.3 117 -M 15.8 *
Evening Star 9200 28.4 24.8 115 33.1 29.9 111
Fisher Creek 9100 36.3 33.1 110 40.0 34.6 116
Northeast Entrance 7350 4.2 4.4 95 16.6 13.5 123
Parker Peak 9400 27.1 21.7 125 27.4 19.6 140
Sylvan Lake 8420 -M 20.3 * -M 24.6 *
Thumb Divide 7980 15.4 13.7 112 21.1 20.6 102
Two Ocean Plateau 9240 33.7 29.4 115 29.0 29.6 98
White Mill 8700 27.3 23.8 115 23.7 25.8 92
Wolverine 7650 4.4 4.2 105 14.5 13.5 107
Younts Peak 8350 -M 15.2 * -M 17.3 *
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Basin Index (%) 114 109
WIND RIVER
Burroughs Creek 8750 -M -M * -M -M *
Castle Creek 8400 .0 -M * 8.0 -M *
Cold Springs 9630 4.7 2.0 235 10.1 12.0 84
Deer Park 9700 15.8 16.3 97 20.9 23.0 91
Hobbs Park 10100 16.9 15.8 107 15.0 16.3 92
Kirwin 9550 10.2 10.3 99 12.7 13.4 95
Little Warm 9370 8.5 9.1 93 10.4 14.8 70
Owl Creek 8975 .1 1.7 6 8.2 7.6 108
South Pass 9040 13.5 15.1 89 14.3 20.0 72
St. Lawrence Alt 8620 -M 3.8 * -M 11.2 *
Togwotee Pass 9580 25.4 24.7 103 27.9 26.8 104
Townsend Creek 8700 9.0 8.2 110 13.5 14.6 92
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Basin Index (%) 101 90
BIGHORN BASIN
Bald Mtn. 9380 17.2 20.5 84 13.9 19.2 72
Bear Trap Meadow 8200 .0 1.5 0 7.8 10.2 76
Bone Springs Div 9350 13.8 16.5 84 13.1 17.7 74
Grave Springs 8550 7.6 9.2 83 10.7 12.4 86
Kirwin 9550 10.2 10.3 99 12.7 13.4 95
Marquette 8760 6.5 -M * 10.8 -M *
Middle Powder 7760 6.2 12.1 51 10.2 13.8 74
Owl Creek 8975 .1 1.7 6 8.2 7.6 108
Powder River Pass 9480 8.3 9.8 85 -M 14.6 *
Shell Creek 9580 14.4 16.0 90 11.8 15.8 75
Timber Creek 7950 .0 3.5 0 7.8 9.5 82
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Basin Index (%) 77 80
SHOSHONE RIVER
Blackwater 9780 27.6 24.9 111 28.2 22.9 123
Evening Star 9200 28.4 24.8 115 33.1 29.9 111
Marquette 8760 6.5 -M * 10.8 -M *
Sylvan Lake 8420 -M 20.3 * -M 24.6 *
Sylvan Road 7120 2.2 7.1 31 17.9 18.2 98
Younts Peak 8350 -M 15.2 * -M 17.3 *
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Basin Index (%) 102 112
POWDER RIVER
Bear Trap Meadow 8200 .0 1.5 0 7.8 10.2 76
Cloud Peak Reservoir 9860 12.3 16.5 75 12.2 16.1 76
Grave Springs 8550 7.6 9.2 83 10.7 12.4 86
Hansen Sawmill 8360 3.1 3.6 86 9.1 10.5 87
Middle Powder 7760 6.2 12.1 51 10.2 13.8 74
Powder River Pass 9480 8.3 9.8 85 -M 14.6 *
Soldier Park 8720 .4 -M * 8.1 -M *
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Basin Index (%) 71 79
TONGUE RIVER
Big Goose 7990 6.9 9.1 76 11.4 13.6 84
Bone Springs Div 9350 13.8 16.5 84 13.1 17.7 74
Burgess Junction 7880 7.6 12.2 62 9.5 14.4 66
Dome Lake 8880 6.3 11.7 54 10.1 16.0 63
Little Goose 8870 8.5 -M * 9.0 -M *
Sucker Creek 8880 9.5 12.5 76 11.0 16.9 65
Tie Creek 6870 .3 2.8 11 12.0 13.8 87
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Basin Index (%) 69 73
BELLE FOURCHE
Blind Park 6890 -M 2.3 * 8.7 13.9 63
Cole Canyon 5910 .0 .3 0* 13.5 11.4 118
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Basin Index (%) 0* 88
CHEYENNE RIVER BASIN
Blind Park 6890 -M 2.3 * 8.7 13.9 63
North Rapid Creek 6130 .0 2.3 0 -M 11.9 *
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Basin Index (%) 0 63
UPPER N. PLATTE
Arapaho Ridge 10960 23.7 22.3 106 28.0 25.8 109
Blackhall Mtn 9820 32.0 -M * 35.7 -M *
Columbine 9160 17.2 19.5 88 31.0 28.1 110
Divide Peak 8880 14.0 18.0 78 24.9 23.9 104
Joe Wright 10120 21.0 23.5 89 32.5 29.3 111
Laprele Creek 8375 7.0 6.9 101 15.6 14.7 106
Med Bow 10500 40.5 -M * 38.2 -M *
Never Summer 10280 23.5 21.5 109 20.9 -M *
North French Creek 10130 30.1 33.0 91 32.6 30.2 108
Old Battle 10000 38.0 34.6 110 38.7 38.6 100
Rawah 9020 6.8 7.4 92 18.9 17.0 111
Sage Creek Basin 7850 8.7 1.4 621 17.6 15.9 111
Sand Lake 10050 -M 31.2 * -M 28.5 *
South Brush Creek 8440 1.5 9.9 15 13.3 17.5 76
Tower 10500 50.3 49.8 101 49.5 44.1 112
Webber Springs 9250 23.0 22.0 105 33.0 29.5 112
Whiskey Park 8950 26.6 25.9 103 34.6 30.9 112
Willow Creek Pass 9540 16.2 13.8 117 19.1 15.4 124
Zirkel 9340 26.1 21.6 121 40.4 30.5 132
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Basin Index (%) 101 110
SWEETWATER
Deer Park 9700 15.8 16.3 97 20.9 23.0 91
Larsen Creek 9000 4.4 9.5 46 16.0 -M *
South Pass 9040 13.5 15.1 89 14.3 20.0 72
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Basin Index (%) 82 82
LOWER N. PLATTE
Casper Mtn. 7900 11.6 14.1 82 14.4 17.6 82
Laprele Creek 8375 7.0 6.9 101 15.6 14.7 106
Reno Hill 8400 14.9 13.4 111 19.7 18.4 107
Windy Peak 7900 4.8 5.1 94 13.1 12.7 103
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Basin Index (%) 97 99
LARAMIE RIVER
Brooklyn Lake 10240 23.5 23.1 102 28.4 24.2 117
Cinnabar Park 9574 18.7 20.0 94 25.8 26.6 97
Crow Creek 8330 .0 .0 * 12.1 13.1 92
Deadman Hill 10220 21.2 18.6 114 21.9 20.2 108
Rawah 9020 6.8 7.4 92 18.9 17.0 111
Roach 9700 14.7 17.1 86 23.7 21.9 108
Windy Peak 7900 4.8 5.1 94 13.1 12.7 103
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Basin Index (%) 98 106
S. PLATTE
Black Mountain 8920 8.9 -M * 15.8 -M *
Crow Creek 8330 .0 .0 * 12.1 13.1 92
Deadman Hill 10220 21.2 18.6 114 21.9 20.2 108
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Basin Index (%) 114* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .3 .6 50* 17.5 16.9 104
Divide Peak 8880 14.0 18.0 78 24.9 23.9 104
Elk River 8700 11.7 14.1 83 21.0 22.3 94
Little Snake River 8915 23.9 22.9 104 40.0 32.1 125
Old Battle 10000 38.0 34.6 110 38.7 38.6 100
Sage Creek Basin 7850 8.7 1.4 621 17.6 15.9 111
Sandstone RS 8150 6.3 7.2 88 19.2 20.4 94
Whiskey Park 8950 26.6 25.9 103 34.6 30.9 112
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Basin Index (%) 104 106
UPPER GREEN RIVER
Big Sandy Opening 9080 13.7 11.6 118 16.5 14.9 111
Blind Bull Sum 8650 24.6 23.9 103 21.1 20.9 101
East Rim Divide 7930 3.2 8.6 37 13.6 12.6 108
Elkhart Park G.S. 9400 13.5 11.7 115 16.0 14.7 109
Gros Ventre Summit 8750 7.1 12.0 59 13.8 14.3 97
Gunsight Pass 9820 -M 13.2 * -M 15.7 *
Indian Creek 9425 22.0 23.7 93 20.2 24.6 82
Kendall R.S. 7740 5.2 5.6 93 13.2 15.2 87
Loomis Park 8240 12.4 11.4 109 19.2 18.6 103
New Fork Lake 8340 6.2 6.9 90 11.1 11.8 94
Pocket Creek 9360 14.1 -M * 16.8 -M *
Snider Basin 8060 -M 9.9 * -M 15.3 *
Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101
Triple Peak 8500 21.0 18.5 114 28.7 27.4 105
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Basin Index (%) 97 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 8.5 -M * 13.8 -M *
Hams Fork 7840 3.0 4.1 73 13.6 12.8 106
Hewinta 9500 -M 5.7 * -M 15.8 *
Hickerson Park 9122 4.9 4.9 100 13.5 11.8 114
Hole-in-Rock 9168 2.9 3.8 76 13.0 11.2 116
Indian Creek 9425 22.0 23.7 93 20.2 24.6 82
Kelley R.S. 8180 12.0 11.8 102 18.0 19.8 91
Spirit Lk 10235 14.8 -M * 19.1 -M *
Steel Creek Park 10158 17.0 16.8 101 21.8 18.7 117
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Basin Index (%) 95 101
UPPER BEAR RIVER
Bear River RS 8777 4.8 -M * 17.3 -M *
Bug Lake 7987 20.1 15.9 126 26.9 21.3 126
Burts Miller Ranch 8000 -M -M * 10.1 -M *
Chalk Creek #1 9171 24.9 24.6 101 32.7 27.9 117
Hayden Fork 9130 -M 9.9 * -M 23.3 *
Kelley R.S. 8180 12.0 11.8 102 18.0 19.8 91
Lily Lake 9133 11.0 9.8 112 18.6 19.2 97
Monte Cristo 8932 34.5 27.2 127 35.8 28.7 125
Salt River Summit 7640 -M 8.2 * -M 18.1 *
Spring Creek Divide 9000 24.0 24.1 100 26.1 25.8 101
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Basin Index (%) 112 111
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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.