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: MAY 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 13.7 7.8 176 24.5 23.1 106
Black Bear 8170 42.9 37.3 115 49.0 42.2 116
Blind Bull Sum 8650 25.1 22.8 110 21.4 21.6 99
Cottonwood Creek 7670 18.8 14.4 131 29.4 27.8 106
East Rim Divide 7930 .7 7.7 9 14.0 13.1 107
Grand Targhee 9260 48.5 45.7 106 37.6 35.2 107
Granite Creek 6770 12.3 7.6 162 23.5 21.6 109
Grassy Lake 7265 -M 27.9 * -M 39.7 *
Gros Ventre Summit 8750 5.9 11.1 53 14.8 14.9 99
Gunsight Pass 9820 15.7 12.0 131 18.8 16.3 115
Lewis Lake Divide 7850 35.3 29.6 119 43.1 39.0 111
Phillips Bench 8200 28.5 24.5 116 35.9 31.0 116
Salt River Summit 7640 9.0 7.4 122 18.8 18.6 101
Snake River Station 6920 11.4 5.6 204 28.2 25.0 113
Spring Creek Divide 9000 24.6 24.3 101 26.5 26.5 100
Thumb Divide 7980 15.0 10.8 139 21.8 21.3 102
Togwotee Pass 9580 26.4 24.7 107 28.8 27.7 104
Two Ocean Plateau 9240 35.1 29.9 117 29.8 30.5 98
Willow Creek 8080 30.3 22.0 138 40.2 38.1 106
Younts Peak 8350 -M 15.8 * -M 18.0 *
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Basin Index (%) 116 107
MADISON-GALLATIN
Black Bear 8170 42.9 37.3 115 49.0 42.2 116
Canyon 7870 12.4 9.1 136 18.5 18.2 102
Madison Plateau 7750 28.4 20.9 136 31.5 29.2 108
West Yellowstone 6700 .6 .2 300* 19.2 16.2 119
Whiskey Creek 6800 15.8 13.3 119 24.0 22.6 106
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Basin Index (%) 124 111
YELLOWSTONE
Beartooth Lake 9360 24.6 22.7 108 23.2 22.2 105
Burnt Mtn 5880 3.5 .0 * 19.0 16.2 117
Canyon 7870 12.4 9.1 136 18.5 18.2 102
Cole Creek 7850 20.7 16.7 124 -M 16.7 *
Evening Star 9200 29.6 24.9 119 34.2 30.8 111
Fisher Creek 9100 36.6 32.7 112 41.0 35.5 115
Northeast Entrance 7350 2.8 1.6 175 16.9 14.0 121
Parker Peak 9400 28.2 21.2 133 28.3 20.3 139
Sylvan Lake 8420 21.0 19.0 111 31.1 25.4 122
Thumb Divide 7980 15.0 10.8 139 21.8 21.3 102
Two Ocean Plateau 9240 35.1 29.9 117 29.8 30.5 98
White Mill 8700 27.9 24.0 116 24.4 26.6 92
Wolverine 7650 3.9 1.1 355 15.0 14.0 107
Younts Peak 8350 -M 15.8 * -M 18.0 *
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Basin Index (%) 122 110
WIND RIVER
Burroughs Creek 8750 9.6 -M * 16.6 -M *
Castle Creek 8400 .0 -M * 8.4 -M *
Cold Springs 9630 5.0 1.4 357 11.1 12.7 87
Deer Park 9700 16.2 15.4 105 22.0 23.8 92
Hobbs Park 10100 17.7 16.0 111 16.2 17.0 95
Kirwin 9550 10.5 10.6 99 13.4 14.1 95
Little Warm 9370 9.3 8.1 115 11.0 15.6 71
Owl Creek 8975 .6 .6 100 9.0 8.1 111
South Pass 9040 13.7 14.1 97 15.5 20.7 75
St. Lawrence Alt 8620 -M 2.0 * -M 11.8 *
Togwotee Pass 9580 26.4 24.7 107 28.8 27.7 104
Townsend Creek 8700 9.5 6.6 144 14.6 15.2 96
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Basin Index (%) 112 91
BIGHORN BASIN
Bald Mtn. 9380 18.0 20.4 88 14.8 20.0 74
Bear Trap Meadow 8200 .1 .4 25* 8.4 10.9 77
Bone Springs Div 9350 15.3 16.4 93 14.3 18.6 77
Grave Springs 8550 7.5 9.3 81 11.0 13.1 84
Kirwin 9550 10.5 10.6 99 13.4 14.1 95
Marquette 8760 7.7 -M * 11.7 -M *
Middle Powder 7760 6.3 11.4 55 10.8 14.4 75
Owl Creek 8975 .6 .6 100 9.0 8.1 111
Powder River Pass 9480 8.2 9.1 90 -M 15.4 *
Shell Creek 9580 15.4 16.0 96 12.5 16.6 75
Timber Creek 7950 .9 2.5 36 9.0 10.2 88
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Basin Index (%) 86 82
SHOSHONE RIVER
Blackwater 9780 29.0 25.8 112 29.6 23.8 124
Evening Star 9200 29.6 24.9 119 34.2 30.8 111
Marquette 8760 7.7 -M * 11.7 -M *
Sylvan Lake 8420 21.0 19.0 111 31.1 25.4 122
Sylvan Road 7120 1.0 4.1 24 18.6 18.8 99
Younts Peak 8350 -M 15.8 * -M 18.0 *
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Basin Index (%) 109 115
POWDER RIVER
Bear Trap Meadow 8200 .1 .4 25* 8.4 10.9 77
Cloud Peak Reservoir 9860 13.0 16.3 80 13.4 17.0 79
Grave Springs 8550 7.5 9.3 81 11.0 13.1 84
Hansen Sawmill 8360 3.5 1.7 206 10.0 11.1 90
Middle Powder 7760 6.3 11.4 55 10.8 14.4 75
Powder River Pass 9480 8.2 9.1 90 -M 15.4 *
Soldier Park 8720 1.2 -M * 9.0 -M *
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Basin Index (%) 80 81
TONGUE RIVER
Big Goose 7990 7.9 9.4 84 12.7 14.4 88
Bone Springs Div 9350 15.3 16.4 93 14.3 18.6 77
Burgess Junction 7880 8.3 11.8 70 10.5 15.1 70
Dome Lake 8880 7.5 11.3 66 11.4 16.7 68
Little Goose 8870 10.3 -M * 10.0 -M *
Sucker Creek 8880 10.4 11.9 87 12.3 17.7 69
Tie Creek 6870 1.3 2.5 52 13.4 14.7 91
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Basin Index (%) 80 77
BELLE FOURCHE
Blind Park 6890 .0 .2 0* 9.1 14.6 62
Cole Canyon 5910 .7 .0 * 14.6 12.4 118
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Basin Index (%) 350* 88
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .2 0* 9.1 14.6 62
North Rapid Creek 6130 .0 .0 * -M 12.6 *
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Basin Index (%) 0* 62
UPPER N. PLATTE
Arapaho Ridge 10960 25.5 22.3 114 29.8 26.5 112
Blackhall Mtn 9820 33.9 -M * 38.3 -M *
Columbine 9160 17.5 17.1 102 32.3 28.9 112
Divide Peak 8880 15.7 17.5 90 27.2 24.8 110
Joe Wright 10120 22.7 22.9 99 34.3 30.4 113
Laprele Creek 8375 7.0 5.4 130 16.5 15.3 108
Med Bow 10500 42.5 -M * 40.6 -M *
Never Summer 10280 25.3 21.8 116 22.6 -M *
North French Creek 10130 32.4 32.7 99 34.9 31.2 112
Old Battle 10000 40.9 34.8 118 42.1 39.7 106
Rawah 9020 7.4 4.8 154 20.2 17.6 115
Sage Creek Basin 7850 9.3 .8 1162* 19.1 16.4 116
Sand Lake 10050 -M 31.6 * -M 29.5 *
South Brush Creek 8440 1.7 7.9 22 14.8 18.2 81
Tower 10500 54.6 50.7 108 52.2 45.3 115
Webber Springs 9250 23.9 21.1 113 35.4 30.3 117
Whiskey Park 8950 29.5 26.9 110 37.5 32.0 117
Willow Creek Pass 9540 18.0 14.5 124 20.8 16.0 130
Zirkel 9340 27.9 20.7 135 42.4 31.3 135
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Basin Index (%) 112 114
SWEETWATER
Deer Park 9700 16.2 15.4 105 22.0 23.8 92
Larsen Creek 9000 2.9 8.3 35 16.4 -M *
South Pass 9040 13.7 14.1 97 15.5 20.7 75
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Basin Index (%) 87 84
LOWER N. PLATTE
Casper Mtn. 7900 11.8 12.5 94 14.9 18.4 81
Laprele Creek 8375 7.0 5.4 130 16.5 15.3 108
Reno Hill 8400 15.4 12.1 127 20.6 19.3 107
Windy Peak 7900 4.8 3.1 155 13.1 13.2 99
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Basin Index (%) 118 98
LARAMIE RIVER
Brooklyn Lake 10240 24.8 23.0 108 30.4 25.1 121
Cinnabar Park 9574 19.6 18.8 104 27.5 27.3 101
Crow Creek 8330 .0 .0 * 13.2 13.7 96
Deadman Hill 10220 23.1 19.1 121 23.5 21.0 112
Rawah 9020 7.4 4.8 154 20.2 17.6 115
Roach 9700 16.0 17.1 94 25.8 22.6 114
Windy Peak 7900 4.8 3.1 155 13.1 13.2 99
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Basin Index (%) 111 109
S. PLATTE
Black Mountain 8920 9.1 -M * 16.9 -M *
Crow Creek 8330 .0 .0 * 13.2 13.7 96
Deadman Hill 10220 23.1 19.1 121 23.5 21.0 112
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Basin Index (%) 121* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .8 .0 * 20.0 17.4 115
Divide Peak 8880 15.7 17.5 90 27.2 24.8 110
Elk River 8700 12.8 12.0 107 23.1 23.1 100
Little Snake River 8915 26.8 21.7 124 43.0 33.2 130
Old Battle 10000 40.9 34.8 118 42.1 39.7 106
Sage Creek Basin 7850 9.3 .8 1162* 19.1 16.4 116
Sandstone RS 8150 7.7 4.6 167 21.9 21.0 104
Whiskey Park 8950 29.5 26.9 110 37.5 32.0 117
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Basin Index (%) 121 113
UPPER GREEN RIVER
Big Sandy Opening 9080 13.7 9.4 146 17.4 15.5 112
Blind Bull Sum 8650 25.1 22.8 110 21.4 21.6 99
East Rim Divide 7930 .7 7.7 9 14.0 13.1 107
Elkhart Park G.S. 9400 14.2 10.6 134 17.0 15.2 112
Gros Ventre Summit 8750 5.9 11.1 53 14.8 14.9 99
Gunsight Pass 9820 15.7 12.0 131 18.8 16.3 115
Indian Creek 9425 21.5 22.1 97 20.4 25.3 81
Kendall R.S. 7740 4.5 2.6 173 13.9 15.7 89
Loomis Park 8240 12.3 10.0 123 19.7 19.2 103
New Fork Lake 8340 5.9 5.5 107 11.8 12.3 96
Pocket Creek 9360 14.4 -M * 17.3 -M *
Snider Basin 8060 2.3 8.5 27 14.9 15.8 94
Spring Creek Divide 9000 24.6 24.3 101 26.5 26.5 100
Triple Peak 8500 20.5 16.3 126 29.0 28.2 103
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Basin Index (%) 102 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.3 -M * 15.8 -M *
Buck Pasture 9632 15.0 -M * 23.9 -M *
EF Blacks Fork GS 9360 -M -M * -M -M *
Hams Fork 7840 .5 1.5 33 13.9 13.3 105
Hewinta 9500 6.7 4.2 160 18.1 16.5 110
Hickerson Park 9122 3.4 3.2 106 14.0 12.2 115
Hole-in-Rock 9168 1.1 1.7 65 13.4 11.8 114
Indian Creek 9425 21.5 22.1 97 20.4 25.3 81
Kelley R.S. 8180 10.8 10.4 104 18.2 20.5 89
Spirit Lk 10235 14.9 -M * 19.8 -M *
Steel Creek Park 10158 17.9 17.4 103 22.7 19.5 116
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Basin Index (%) 102 101
UPPER BEAR RIVER
Bear River RS 8777 2.7 -M * 17.9 -M *
Bug Lake 7987 19.6 13.8 142 27.2 22.0 124
Burts Miller Ranch 8000 -M -M * 10.3 -M *
Chalk Creek #1 9171 24.1 23.4 103 33.5 28.9 116
Hayden Fork 9130 10.6 8.6 123 27.0 24.1 112
Kelley R.S. 8180 10.8 10.4 104 18.2 20.5 89
Lily Lake 9133 10.2 9.7 105 19.4 19.9 97
Monte Cristo 8932 33.4 25.3 132 36.2 29.7 122
Salt River Summit 7640 9.0 7.4 122 18.8 18.6 101
Spring Creek Divide 9000 24.6 24.3 101 26.5 26.5 100
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Basin Index (%) 116 109
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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.