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 THURSDAY: APRIL 4 , 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 17.3 15.0 115 20.7 20.4 101
Black Bear 8170 42.0 37.0 114 41.3 37.3 111
Blind Bull Sum 8650 23.1 23.0 100 18.3 19.1 96
Cottonwood Creek 7670 20.6 21.2 97 24.9 24.1 103
East Rim Divide 7930 11.0 10.2 108 11.5 11.5 100
Grand Targhee 9260 42.1 37.6 112 30.9 30.2 102
Granite Creek 6770 18.9 14.7 129 20.0 19.3 104
Grassy Lake 7265 33.3 31.6 105 35.7 35.2 101
Gros Ventre Summit 8750 8.3 13.0 64 11.7 12.6 93
Gunsight Pass 9820 12.4 13.6 91 14.9 13.4 111
Lewis Lake Divide 7850 34.4 29.6 116 36.4 34.6 105
Phillips Bench 8200 28.7 24.7 116 31.1 27.5 113
Salt River Summit 7640 13.9 13.0 107 15.8 16.3 97
Snake River Station 6920 19.4 15.1 128 24.5 21.9 112
Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100
Thumb Divide 7980 18.5 14.7 126 18.1 18.1 100
Togwotee Pass 9580 23.2 21.8 106 24.0 23.7 101
Two Ocean Plateau 9240 29.0 25.7 113 24.5 26.5 92
Willow Creek 8080 30.8 28.2 109 33.7 32.8 103
Younts Peak 8350 -M 14.2 * -M 15.4 *
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Basin Index (%) 109 103
MADISON-GALLATIN
Black Bear 8170 42.0 37.0 114 41.3 37.3 111
Canyon 7870 13.1 12.4 106 15.1 15.8 96
Madison Plateau 7750 26.7 21.4 125 26.3 25.6 103
West Yellowstone 6700 13.0 10.0 130 16.4 13.8 119
Whiskey Creek 6800 19.3 15.0 129 19.4 19.6 99
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Basin Index (%) 119 106
YELLOWSTONE
Beartooth Lake 9360 19.0 21.2 90 17.7 19.2 92
Burnt Mtn 5880 8.1 4.6 176 12.7 12.6 101
Canyon 7870 13.1 12.4 106 15.1 15.8 96
Cole Creek 7850 15.5 14.1 110 -M 12.4 *
Evening Star 9200 24.2 23.8 102 27.0 26.5 102
Fisher Creek 9100 29.3 30.8 95 32.2 30.8 105
Northeast Entrance 7350 9.6 9.2 104 12.5 11.9 105
Parker Peak 9400 22.4 19.1 117 22.8 17.1 133
Sylvan Lake 8420 20.3 19.3 105 26.0 21.7 120
Thumb Divide 7980 18.5 14.7 126 18.1 18.1 100
Two Ocean Plateau 9240 29.0 25.7 113 24.5 26.5 92
White Mill 8700 20.8 21.9 95 18.0 23.1 78
Wolverine 7650 11.2 9.4 119 12.3 11.9 103
Younts Peak 8350 -M 14.2 * -M 15.4 *
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Basin Index (%) 107 102
WIND RIVER
Burroughs Creek 8750 10.6 -M * 12.2 -M *
Castle Creek 8400 4.3 -M * 5.7 -M *
Cold Springs 9630 6.9 7.0 99 7.4 9.7 76
Deer Park 9700 15.6 15.1 103 17.2 19.3 89
Hobbs Park 10100 14.2 13.8 103 11.0 13.0 85
Kirwin 9550 10.5 9.5 111 10.7 11.2 96
Little Warm 9370 9.1 10.2 89 9.0 12.5 72
Owl Creek 8975 4.9 5.7 86 5.9 5.9 100
South Pass 9040 13.6 15.1 90 11.0 17.0 65
St. Lawrence Alt 8620 -M 6.8 * -M 8.7 *
Togwotee Pass 9580 23.2 21.8 106 24.0 23.7 101
Townsend Creek 8700 9.6 9.3 103 10.5 11.7 90
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Basin Index (%) 100 86
BIGHORN BASIN
Bald Mtn. 9380 16.1 18.9 85 11.9 16.5 72
Bear Trap Meadow 8200 7.1 5.1 139 6.9 8.2 84
Bone Springs Div 9350 12.4 16.4 76 11.0 15.1 73
Grave Springs 8550 8.2 9.1 90 9.0 10.2 88
Kirwin 9550 10.5 9.5 111 10.7 11.2 96
Marquette 8760 7.3 -M * 8.8 -M *
Middle Powder 7760 9.2 11.7 79 5.0 11.3 44
Owl Creek 8975 4.9 5.7 86 5.9 5.9 100
Powder River Pass 9480 9.3 10.1 92 9.4 12.2 77
Shell Creek 9580 12.6 14.8 85 10.8 13.4 81
Timber Creek 7950 4.0 4.9 82 5.9 7.2 82
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Basin Index (%) 89 78
SHOSHONE RIVER
Blackwater 9780 22.8 22.3 102 23.1 20.0 116
Evening Star 9200 24.2 23.8 102 27.0 26.5 102
Marquette 8760 7.3 -M * 8.8 -M *
Sylvan Lake 8420 20.3 19.3 105 26.0 21.7 120
Sylvan Road 7120 10.2 11.0 93 15.2 16.3 93
Younts Peak 8350 -M 14.2 * -M 15.4 *
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Basin Index (%) 101 108
POWDER RIVER
Bear Trap Meadow 8200 7.1 5.1 139 6.9 8.2 84
Cloud Peak Reservoir 9860 11.4 14.4 79 10.2 12.9 79
Grave Springs 8550 8.2 9.1 90 9.0 10.2 88
Hansen Sawmill 8360 5.5 6.2 89 7.1 8.3 86
Middle Powder 7760 9.2 11.7 79 5.0 11.3 44
Powder River Pass 9480 9.3 10.1 92 9.4 12.2 77
Soldier Park 8720 4.1 -M * 6.6 -M *
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Basin Index (%) 90 75
TONGUE RIVER
Big Goose 7990 7.8 9.3 84 9.4 11.1 85
Bone Springs Div 9350 12.4 16.4 76 11.0 15.1 73
Burgess Junction 7880 8.3 11.6 72 8.3 12.0 69
Dome Lake 8880 8.5 11.6 73 7.7 13.2 58
Little Goose 8870 8.6 -M * 7.5 -M *
Sucker Creek 8880 10.4 11.8 88 9.6 14.0 69
Tie Creek 6870 4.5 5.5 82 9.6 11.3 85
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Basin Index (%) 78 72
BELLE FOURCHE
Blind Park 6890 6.9 7.1 97 7.4 11.5 64
Cole Canyon 5910 6.4 5.6 114 10.8 9.1 119
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Basin Index (%) 105 88
CHEYENNE RIVER BASIN
Blind Park 6890 6.9 7.1 97 7.4 11.5 64
North Rapid Creek 6130 6.3 6.7 94 6.8 9.5 72
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Basin Index (%) 96 68
UPPER N. PLATTE
Arapaho Ridge 10960 25.2 20.4 124 25.7 21.8 118
Blackhall Mtn 9820 32.9 -M * 33.1 -M *
Columbine 9160 28.9 23.3 124 28.6 25.0 114
Divide Peak 8880 21.7 19.7 110 23.5 21.0 112
Joe Wright 10120 21.4 20.6 104 29.7 25.2 118
Laprele Creek 8375 13.9 9.4 148 14.6 12.2 120
Med Bow 10500 38.1 -M * 33.5 -M *
Never Summer 10280 22.5 20.0 112 18.8 -M *
North French Creek 10130 30.1 28.7 105 30.1 26.1 115
Old Battle 10000 36.5 30.7 119 36.8 34.2 108
Rawah 9020 14.4 10.4 138 17.5 13.8 127
Sage Creek Basin 7850 19.5 12.5 156 16.5 14.2 116
Sand Lake 10050 29.3 28.3 104 24.5 24.2 101
South Brush Creek 8440 12.0 12.1 99 12.2 14.9 82
Tower 10500 51.0 45.1 113 45.3 38.9 116
Webber Springs 9250 26.7 23.0 116 31.5 26.1 121
Whiskey Park 8950 31.4 26.8 117 32.8 27.3 120
Willow Creek Pass 9540 16.3 12.0 136 17.3 13.1 132
Zirkel 9340 33.9 26.3 129 37.3 27.8 134
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Basin Index (%) 118 116
SWEETWATER
Deer Park 9700 15.6 15.1 103 17.2 19.3 89
Larsen Creek 9000 10.9 11.9 92 14.2 -M *
South Pass 9040 13.6 15.1 90 11.0 17.0 65
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Basin Index (%) 95 78
LOWER N. PLATTE
Casper Mtn. 7900 16.0 14.0 114 12.5 14.4 87
Laprele Creek 8375 13.9 9.4 148 14.6 12.2 120
Reno Hill 8400 17.2 13.7 126 17.4 14.9 117
Windy Peak 7900 11.2 7.8 144 11.7 10.2 115
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Basin Index (%) 130 109
LARAMIE RIVER
Brooklyn Lake 10240 24.1 21.0 115 25.3 20.6 123
Cinnabar Park 9574 20.4 20.6 99 23.6 23.6 100
Crow Creek 8330 6.2 7.0 89 10.7 10.5 102
Deadman Hill 10220 21.3 15.9 134 19.9 16.9 118
Rawah 9020 14.4 10.4 138 17.5 13.8 127
Roach 9700 17.9 16.1 111 21.7 18.8 115
Windy Peak 7900 11.2 7.8 144 11.7 10.2 115
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Basin Index (%) 117 114
S. PLATTE
Black Mountain 8920 12.0 -M * 12.9 -M *
Crow Creek 8330 6.2 7.0 89 10.7 10.5 102
Deadman Hill 10220 21.3 15.9 134 19.9 16.9 118
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Basin Index (%) 120 112
LITTLE SNAKE RIVER
Battle Mountain 7440 13.1 10.2 128 16.7 14.7 114
Divide Peak 8880 21.7 19.7 110 23.5 21.0 112
Elk River 8700 20.4 19.1 107 19.3 19.6 98
Little Snake River 8915 29.8 24.2 123 37.8 29.1 130
Old Battle 10000 36.5 30.7 119 36.8 34.2 108
Sage Creek Basin 7850 19.5 12.5 156 16.5 14.2 116
Sandstone RS 8150 17.4 12.9 135 18.8 18.0 104
Whiskey Park 8950 31.4 26.8 117 32.8 27.3 120
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Basin Index (%) 122 114
UPPER GREEN RIVER
Big Sandy Opening 9080 13.5 12.4 109 14.4 12.9 112
Blind Bull Sum 8650 23.1 23.0 100 18.3 19.1 96
East Rim Divide 7930 11.0 10.2 108 11.5 11.5 100
Elkhart Park G.S. 9400 13.0 12.2 107 13.6 13.0 105
Gros Ventre Summit 8750 8.3 13.0 64 11.7 12.6 93
Gunsight Pass 9820 12.4 13.6 91 14.9 13.4 111
Indian Creek 9425 22.5 24.3 93 18.0 22.1 81
Kendall R.S. 7740 10.5 11.5 91 11.4 13.9 82
Loomis Park 8240 15.7 14.0 112 16.6 16.9 98
New Fork Lake 8340 10.3 10.3 100 9.5 10.5 90
Pocket Creek 9360 14.6 -M * 15.2 -M *
Snider Basin 8060 11.5 12.3 93 13.4 13.9 96
Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100
Triple Peak 8500 23.4 21.9 107 24.7 24.8 100
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Basin Index (%) 98 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.2 -M * 12.4 -M *
Buck Pasture 9632 15.0 -M * 18.1 -M *
EF Blacks Fork GS 9360 11.9 -M * 10.3 -M *
Hams Fork 7840 10.9 10.9 100 11.5 11.1 104
Hewinta 9500 13.0 11.0 118 14.1 13.7 103
Hickerson Park 9122 9.0 7.7 117 10.9 10.0 109
Hole-in-Rock 9168 6.7 6.9 97 10.0 9.4 106
Indian Creek 9425 22.5 24.3 93 18.0 22.1 81
Kelley R.S. 8180 15.4 15.0 103 15.7 17.7 89
Spirit Lk 10235 15.8 -M * 16.3 -M *
Steel Creek Park 10158 14.7 15.6 94 17.4 16.1 108
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Basin Index (%) 101 98
UPPER BEAR RIVER
Bear River RS 8777 10.9 -M * 14.5 -M *
Bug Lake 7987 23.9 18.2 131 23.3 19.0 123
Burts Miller Ranch 8000 7.1 -M * 8.4 -M *
Chalk Creek #1 9171 25.5 23.9 107 29.0 24.7 117
Hayden Fork 9130 16.4 15.3 107 22.5 20.6 109
Kelley R.S. 8180 15.4 15.0 103 15.7 17.7 89
Lily Lake 9133 12.6 12.4 102 15.7 16.7 94
Monte Cristo 8932 33.4 27.2 123 31.1 25.4 122
Salt River Summit 7640 13.9 13.0 107 15.8 16.3 97
Spring Creek Divide 9000 22.8 22.5 101 23.2 23.3 100
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Basin Index (%) 111 108
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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.