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: MAY 5 , 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 12.4 7.2 172 24.5 23.2 106
Black Bear 8170 43.4 37.2 117 49.0 42.3 116
Blind Bull Sum 8650 24.7 22.7 109 21.4 21.7 99
Cottonwood Creek 7670 18.0 14.1 128 29.5 28.0 105
East Rim Divide 7930 .0 7.4 0 14.0 13.1 107
Grand Targhee 9260 48.6 46.0 106 37.7 35.3 107
Granite Creek 6770 11.7 7.4 158 23.5 21.6 109
Grassy Lake 7265 -M 27.6 * -M 39.8 *
Gros Ventre Summit 8750 6.2 10.8 57 14.8 14.9 99
Gunsight Pass 9820 15.6 11.8 132 18.9 16.3 116
Lewis Lake Divide 7850 34.3 29.5 116 43.1 39.1 110
Phillips Bench 8200 27.9 24.2 115 35.8 31.1 115
Salt River Summit 7640 8.4 7.1 118 18.8 18.6 101
Snake River Station 6920 9.9 5.1 194 28.3 25.1 113
Spring Creek Divide 9000 24.5 24.2 101 26.5 26.6 100
Thumb Divide 7980 14.5 10.3 141 21.8 21.3 102
Togwotee Pass 9580 26.2 24.8 106 28.8 27.8 104
Two Ocean Plateau 9240 35.0 29.9 117 29.8 30.6 97
Willow Creek 8080 28.8 21.8 132 40.1 38.3 105
Younts Peak 8350 -M 15.7 * -M 18.0 *
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Basin Index (%) 114 107
MADISON-GALLATIN
Black Bear 8170 43.4 37.2 117 49.0 42.3 116
Canyon 7870 12.0 8.8 136 18.5 18.3 101
Madison Plateau 7750 28.0 20.8 135 31.5 29.4 107
West Yellowstone 6700 .2 .0 * 19.2 16.2 119
Whiskey Creek 6800 15.5 12.9 120 24.0 22.6 106
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Basin Index (%) 124 110
YELLOWSTONE
Beartooth Lake 9360 24.5 22.7 108 23.2 22.3 104
Burnt Mtn 5880 3.1 .0 * 19.0 16.2 117
Canyon 7870 12.0 8.8 136 18.5 18.3 101
Cole Creek 7850 20.5 16.8 122 -M 16.8 *
Evening Star 9200 29.5 24.9 118 34.2 30.9 111
Fisher Creek 9100 36.5 32.9 111 41.0 35.7 115
Northeast Entrance 7350 1.9 1.2 158 16.9 14.0 121
Parker Peak 9400 28.3 21.3 133 28.3 20.4 139
Sylvan Lake 8420 20.5 18.7 110 31.1 25.5 122
Thumb Divide 7980 14.5 10.3 141 21.8 21.3 102
Two Ocean Plateau 9240 35.0 29.9 117 29.8 30.6 97
White Mill 8700 28.1 24.0 117 24.4 26.7 91
Wolverine 7650 3.2 .8 400* 15.0 14.0 107
Younts Peak 8350 -M 15.7 * -M 18.0 *
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Basin Index (%) 121 110
WIND RIVER
Burroughs Creek 8750 9.4 -M * 16.6 -M *
Castle Creek 8400 .0 -M * 8.4 -M *
Cold Springs 9630 4.8 1.5 320 11.1 12.8 87
Deer Park 9700 15.8 15.1 105 22.1 23.8 93
Hobbs Park 10100 17.7 15.9 111 16.2 17.1 95
Kirwin 9550 10.3 10.7 96 13.5 14.2 95
Little Warm 9370 9.1 7.8 117 11.1 15.7 71
Owl Creek 8975 .5 .6 83 9.1 8.2 111
South Pass 9040 13.4 13.8 97 15.7 20.8 75
St. Lawrence Alt 8620 -M 1.8 * -M 11.8 *
Togwotee Pass 9580 26.2 24.8 106 28.8 27.8 104
Townsend Creek 8700 9.3 6.2 150 14.7 15.2 97
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Basin Index (%) 111 91
BIGHORN BASIN
Bald Mtn. 9380 17.9 20.4 88 14.8 20.1 74
Bear Trap Meadow 8200 .0 .3 0* 8.5 11.0 77
Bone Springs Div 9350 15.3 16.4 93 14.3 18.6 77
Grave Springs 8550 7.2 9.1 79 11.0 13.1 84
Kirwin 9550 10.3 10.7 96 13.5 14.2 95
Marquette 8760 7.6 -M * 11.7 -M *
Middle Powder 7760 6.2 11.3 55 10.9 14.5 75
Owl Creek 8975 .5 .6 83 9.1 8.2 111
Powder River Pass 9480 8.0 9.1 88 -M 15.4 *
Shell Creek 9580 15.3 16.2 94 12.6 16.7 75
Timber Creek 7950 .5 2.3 22 9.0 10.3 87
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Basin Index (%) 84 82
SHOSHONE RIVER
Blackwater 9780 29.0 25.8 112 29.6 23.9 124
Evening Star 9200 29.5 24.9 118 34.2 30.9 111
Marquette 8760 7.6 -M * 11.7 -M *
Sylvan Lake 8420 20.5 18.7 110 31.1 25.5 122
Sylvan Road 7120 .1 3.7 3 18.7 18.9 99
Younts Peak 8350 -M 15.7 * -M 18.0 *
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Basin Index (%) 108 115
POWDER RIVER
Bear Trap Meadow 8200 .0 .3 0* 8.5 11.0 77
Cloud Peak Reservoir 9860 13.0 16.4 79 13.4 17.1 78
Grave Springs 8550 7.2 9.1 79 11.0 13.1 84
Hansen Sawmill 8360 3.3 1.7 194 10.0 11.1 90
Middle Powder 7760 6.2 11.3 55 10.9 14.5 75
Powder River Pass 9480 8.0 9.1 88 -M 15.4 *
Soldier Park 8720 1.1 -M * 9.0 -M *
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Basin Index (%) 79 81
TONGUE RIVER
Big Goose 7990 7.7 9.6 80 12.6 14.5 87
Bone Springs Div 9350 15.3 16.4 93 14.3 18.6 77
Burgess Junction 7880 8.1 11.7 69 10.5 15.1 70
Dome Lake 8880 7.5 11.3 66 11.4 16.8 68
Little Goose 8870 10.1 -M * 10.0 -M *
Sucker Creek 8880 10.4 12.0 87 12.4 17.8 70
Tie Creek 6870 1.0 2.4 42 13.4 14.8 91
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Basin Index (%) 79 76
BELLE FOURCHE
Blind Park 6890 .0 .0 * 9.1 14.7 62
Cole Canyon 5910 .1 .0 * 14.5 12.4 117
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Basin Index (%) * 87
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 9.1 14.7 62
North Rapid Creek 6130 .0 .0 * -M 12.6 *
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Basin Index (%) * 62
UPPER N. PLATTE
Arapaho Ridge 10960 25.3 22.2 114 29.8 26.8 111
Blackhall Mtn 9820 33.7 -M * 38.4 -M *
Columbine 9160 16.7 16.5 101 32.3 29.1 111
Divide Peak 8880 15.3 17.1 89 27.3 24.8 110
Joe Wright 10120 22.5 22.8 99 34.3 30.6 112
Laprele Creek 8375 6.2 5.2 119 16.6 15.4 108
Med Bow 10500 42.1 -M * 40.6 -M *
Never Summer 10280 25.2 21.9 115 22.7 -M *
North French Creek 10130 32.2 32.7 98 34.9 31.3 112
Old Battle 10000 40.7 35.0 116 42.1 39.8 106
Rawah 9020 6.8 4.4 155 20.2 17.7 114
Sage Creek Basin 7850 8.4 .6 1400* 19.1 16.5 116
Sand Lake 10050 32.8 31.6 104 29.2 29.6 99
South Brush Creek 8440 1.0 7.5 13 15.0 18.3 82
Tower 10500 54.7 51.0 107 52.2 45.5 115
Webber Springs 9250 23.4 20.8 112 35.4 30.4 116
Whiskey Park 8950 29.1 27.0 108 37.5 32.1 117
Willow Creek Pass 9540 17.9 14.5 123 20.8 16.1 129
Zirkel 9340 27.2 20.6 132 42.5 31.5 135
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Basin Index (%) 110 112
SWEETWATER
Deer Park 9700 15.8 15.1 105 22.1 23.8 93
Larsen Creek 9000 2.0 8.0 25 16.4 -M *
South Pass 9040 13.4 13.8 97 15.7 20.8 75
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Basin Index (%) 85 85
LOWER N. PLATTE
Casper Mtn. 7900 10.9 12.2 89 14.9 18.5 81
Laprele Creek 8375 6.2 5.2 119 16.6 15.4 108
Reno Hill 8400 15.0 12.0 125 20.7 19.4 107
Windy Peak 7900 4.0 2.8 143 13.4 13.3 101
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Basin Index (%) 112 98
LARAMIE RIVER
Brooklyn Lake 10240 24.4 22.8 107 30.4 25.2 121
Cinnabar Park 9574 19.3 18.5 104 27.5 27.5 100
Crow Creek 8330 .0 .0 * 13.2 13.8 96
Deadman Hill 10220 22.6 19.1 118 23.6 21.1 112
Rawah 9020 6.8 4.4 155 20.2 17.7 114
Roach 9700 15.6 17.0 92 25.8 22.8 113
Windy Peak 7900 4.0 2.8 143 13.4 13.3 101
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Basin Index (%) 110 109
S. PLATTE
Black Mountain 8920 8.2 -M * 17.0 -M *
Crow Creek 8330 .0 .0 * 13.2 13.8 96
Deadman Hill 10220 22.6 19.1 118 23.6 21.1 112
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Basin Index (%) 118* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 20.0 17.4 115
Divide Peak 8880 15.3 17.1 89 27.3 24.8 110
Elk River 8700 12.2 11.3 108 23.2 23.2 100
Little Snake River 8915 26.2 21.4 122 43.1 33.3 129
Old Battle 10000 40.7 35.0 116 42.1 39.8 106
Sage Creek Basin 7850 8.4 .6 1400* 19.1 16.5 116
Sandstone RS 8150 7.0 4.1 171 21.9 21.1 104
Whiskey Park 8950 29.1 27.0 108 37.5 32.1 117
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Basin Index (%) 119 112
UPPER GREEN RIVER
Big Sandy Opening 9080 13.3 9.0 148 17.4 15.5 112
Blind Bull Sum 8650 24.7 22.7 109 21.4 21.7 99
East Rim Divide 7930 .0 7.4 0 14.0 13.1 107
Elkhart Park G.S. 9400 14.1 10.3 137 17.0 15.3 111
Gros Ventre Summit 8750 6.2 10.8 57 14.8 14.9 99
Gunsight Pass 9820 15.6 11.8 132 18.9 16.3 116
Indian Creek 9425 20.9 21.8 96 20.5 25.4 81
Kendall R.S. 7740 4.1 2.0 205 13.9 15.7 89
Loomis Park 8240 11.8 9.5 124 19.7 19.2 103
New Fork Lake 8340 5.4 5.0 108 12.0 12.4 97
Pocket Creek 9360 14.3 -M * 17.4 -M *
Snider Basin 8060 1.5 8.2 18 14.9 15.8 94
Spring Creek Divide 9000 24.5 24.2 101 26.5 26.6 100
Triple Peak 8500 19.7 15.9 124 29.1 28.3 103
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Basin Index (%) 102 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.6 -M * 15.8 -M *
Buck Pasture 9632 14.5 -M * 23.9 -M *
EF Blacks Fork GS 9360 7.0 -M * 14.9 -M *
Hams Fork 7840 .0 1.1 0 13.9 13.3 105
Hewinta 9500 6.1 4.0 152 18.1 16.6 109
Hickerson Park 9122 2.7 2.7 100 14.0 12.3 114
Hole-in-Rock 9168 .8 1.5 53 13.5 11.9 113
Indian Creek 9425 20.9 21.8 96 20.5 25.4 81
Kelley R.S. 8180 10.0 10.0 100 18.3 20.5 89
Spirit Lk 10235 14.5 -M * 19.9 -M *
Steel Creek Park 10158 17.4 17.5 99 22.7 19.6 116
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Basin Index (%) 99 101
UPPER BEAR RIVER
Bear River RS 8777 1.4 -M * 18.0 -M *
Bug Lake 7987 18.8 13.4 140 27.2 22.1 123
Burts Miller Ranch 8000 -M -M * 10.3 -M *
Chalk Creek #1 9171 23.3 23.2 100 33.5 29.1 115
Hayden Fork 9130 9.9 8.1 122 27.1 24.3 112
Kelley R.S. 8180 10.0 10.0 100 18.3 20.5 89
Lily Lake 9133 9.0 9.2 98 19.4 20.0 97
Monte Cristo 8932 32.5 24.6 132 36.1 29.9 121
Salt River Summit 7640 8.4 7.1 118 18.8 18.6 101
Spring Creek Divide 9000 24.5 24.2 101 26.5 26.6 100
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Basin Index (%) 114 108
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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.