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 MONDAY: MAY 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 .0 .0 * 26.2 25.2 104
Black Bear 8170 39.8 29.9 133 52.8 45.6 116
Blind Bull Sum 8650 22.2 15.8 141 24.3 23.9 102
Cottonwood Creek 7670 8.4 .3 2800* 33.6 30.9 109
East Rim Divide 7930 .0 .0 * 16.5 14.7 112
Grand Targhee 9260 46.3 41.1 113 41.5 38.1 109
Granite Creek 6770 .1 .0 * 26.6 23.6 113
Grassy Lake 7265 -M 10.3 * -M 42.9 *
Gros Ventre Summit 8750 .0 .9 0* 16.3 16.6 98
Gunsight Pass 9820 12.7 5.8 219 20.4 18.2 112
Lewis Lake Divide 7850 21.2 16.7 127 45.6 42.0 109
Phillips Bench 8200 19.8 13.6 146 38.6 33.6 115
Salt River Summit 7640 .0 .0 * 22.2 20.5 108
Snake River Station 6920 .0 .0 * 30.4 27.2 112
Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103
Thumb Divide 7980 2.8 .0 * 23.8 23.4 102
Togwotee Pass 9580 24.8 21.7 114 31.3 30.5 103
Two Ocean Plateau 9240 29.0 27.4 106 31.6 33.8 93
Willow Creek 8080 18.9 8.6 220 44.7 41.9 107
Younts Peak 8350 -M 8.3 * -M 20.3 *
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Basin Index (%) 136 107
MADISON-GALLATIN
Black Bear 8170 39.8 29.9 133 52.8 45.6 116
Canyon 7870 1.7 .0 * 20.2 20.5 99
Madison Plateau 7750 19.5 10.7 182 34.8 32.4 107
West Yellowstone 6700 .1 .0 * 21.6 18.1 119
Whiskey Creek 6800 6.3 1.1 573* 26.4 25.0 106
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Basin Index (%) 162* 110
YELLOWSTONE
Beartooth Lake 9360 25.3 19.8 128 26.8 24.8 108
Burnt Mtn 5880 .1 .0 * 24.5 20.4 120
Canyon 7870 1.7 .0 * 20.2 20.5 99
Cole Creek 7850 20.7 12.5 166 22.6 20.6 110
Evening Star 9200 27.3 20.9 131 37.8 34.4 110
Fisher Creek 9100 35.0 30.2 116 44.3 39.4 112
Northeast Entrance 7350 .1 .0 * 19.0 16.2 117
Parker Peak 9400 26.3 17.4 151 31.6 23.3 136
Sylvan Lake 8420 13.9 11.4 122 33.7 28.6 118
Thumb Divide 7980 2.8 .0 * 23.8 23.4 102
Two Ocean Plateau 9240 29.0 27.4 106 31.6 33.8 93
White Mill 8700 24.4 20.0 122 27.0 29.8 91
Wolverine 7650 .0 .0 * 17.5 16.1 109
Younts Peak 8350 -M 8.3 * -M 20.3 *
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Basin Index (%) 129 109
WIND RIVER
Burroughs Creek 8750 2.0 -M * 18.5 -M *
Castle Creek 8400 .0 -M * 10.8 -M *
Cold Springs 9630 1.4 .0 * 14.0 15.0 93
Deer Park 9700 14.1 7.0 201 25.9 26.8 97
Hobbs Park 10100 19.4 9.6 202 21.5 20.0 108
Kirwin 9550 7.1 5.0 142 16.5 16.5 100
Little Warm 9370 1.9 .0 * 11.8 18.0 66
Owl Creek 8975 1.3 .0 * 12.2 10.3 118
South Pass 9040 10.9 1.5 727* 19.7 23.2 85
St. Lawrence Alt 8620 -M .0 * -M 14.1 *
Togwotee Pass 9580 24.8 21.7 114 31.3 30.5 103
Townsend Creek 8700 8.2 .0 * 20.3 17.8 114
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Basin Index (%) 199* 97
BIGHORN BASIN
Bald Mtn. 9380 21.2 16.3 130 20.8 23.0 90
Bear Trap Meadow 8200 .1 .0 * 11.6 13.5 86
Bone Springs Div 9350 15.7 11.8 133 18.6 21.8 85
Grave Springs 8550 3.4 .0 * 13.9 15.9 87
Kirwin 9550 7.1 5.0 142 16.5 16.5 100
Marquette 8760 8.5 -M * 18.9 -M *
Middle Powder 7760 2.4 .0 * 15.4 17.0 91
Owl Creek 8975 1.3 .0 * 12.2 10.3 118
Powder River Pass 9480 3.2 .2 1600* 13.9 18.2 76
Shell Creek 9580 16.0 12.6 127 17.0 19.4 88
Timber Creek 7950 2.4 .0 * 14.1 13.0 108
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Basin Index (%) 159* 91
SHOSHONE RIVER
Blackwater 9780 28.6 22.7 126 33.2 26.9 123
Evening Star 9200 27.3 20.9 131 37.8 34.4 110
Marquette 8760 8.5 -M * 18.9 -M *
Sylvan Lake 8420 13.9 11.4 122 33.7 28.6 118
Sylvan Road 7120 .0 .0 * 19.7 20.9 94
Younts Peak 8350 -M 8.3 * -M 20.3 *
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Basin Index (%) 127 112
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 11.6 13.5 86
Cloud Peak Reservoir 9860 13.4 10.3 130 18.5 20.7 89
Grave Springs 8550 3.4 .0 * 13.9 15.9 87
Hansen Sawmill 8360 1.3 .0 * 13.9 13.8 101
Middle Powder 7760 2.4 .0 * 15.4 17.0 91
Powder River Pass 9480 3.2 .2 1600* 13.9 18.2 76
Soldier Park 8720 1.1 -M * 12.2 -M *
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Basin Index (%) 227* 88
TONGUE RIVER
Big Goose 7990 8.0 .0 * 18.6 18.0 103
Bone Springs Div 9350 15.7 11.8 133 18.6 21.8 85
Burgess Junction 7880 6.6 3.0 220 14.7 17.7 83
Dome Lake 8880 8.5 .8 1062* 17.8 19.9 89
Little Goose 8870 10.7 -M * 13.9 -M *
Sucker Creek 8880 11.0 4.0 275 18.8 21.1 89
Tie Creek 6870 1.6 .0 * 19.0 18.3 104
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Basin Index (%) 262* 92
BELLE FOURCHE
Blind Park 6890 .0 .0 * 11.3 17.8 63
Cole Canyon 5910 .1 .0 * 20.7 16.0 129
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Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.3 17.8 63
North Rapid Creek 6130 -M .0 * -M 15.5 *
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Basin Index (%) * 63
UPPER N. PLATTE
Arapaho Ridge 10960 25.1 12.0 209 33.6 28.9 116
Blackhall Mtn 9820 28.5 -M * 40.7 -M *
Columbine 9160 6.5 .0 * 35.2 31.1 113
Divide Peak 8880 4.9 .1 4900* 29.7 27.0 110
Joe Wright 10120 22.1 17.1 129 37.4 33.7 111
Laprele Creek 8375 .0 .0 * 19.3 17.6 110
Med Bow 10500 41.8 -M * 43.7 -M *
Never Summer 10280 24.4 17.3 141 25.1 -M *
North French Creek 10130 29.7 24.7 120 37.5 34.6 108
Old Battle 10000 40.2 28.2 143 45.8 43.1 106
Rawah 9020 .2 .0 * 21.8 19.3 113
Sage Creek Basin 7850 -M .0 * 20.3 17.7 115
Sand Lake 10050 31.5 23.6 133 31.6 32.6 97
South Brush Creek 8440 .0 .0 * 16.9 20.7 82
Tower 10500 57.3 42.6 135 56.8 48.7 117
Webber Springs 9250 17.3 4.0 432 38.8 32.6 119
Whiskey Park 8950 20.2 13.0 155 39.6 34.4 115
Willow Creek Pass 9540 12.3 3.9 315 22.1 18.0 123
Zirkel 9340 16.1 .0 * 45.2 33.8 134
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Basin Index (%) 165 112
SWEETWATER
Deer Park 9700 14.1 7.0 201 25.9 26.8 97
Larsen Creek 9000 .0 1.5 0 17.8 -M *
South Pass 9040 10.9 1.5 727* 19.7 23.2 85
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Basin Index (%) 250 91
LOWER N. PLATTE
Casper Mtn. 7900 7.2 .3 2400* 20.2 21.2 95
Laprele Creek 8375 .0 .0 * 19.3 17.6 110
Reno Hill 8400 10.0 .0 * 25.1 22.2 113
Windy Peak 7900 .2 .0 * 15.1 15.6 97
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Basin Index (%) 5800* 104
LARAMIE RIVER
Brooklyn Lake 10240 18.5 10.0 185 33.2 27.9 119
Cinnabar Park 9574 14.0 5.5 255 29.9 30.0 100
Crow Creek 8330 .0 .0 * 15.0 15.8 95
Deadman Hill 10220 16.6 11.8 141 25.1 23.6 106
Rawah 9020 .2 .0 * 21.8 19.3 113
Roach 9700 8.9 5.6 159 28.5 25.3 113
Windy Peak 7900 .2 .0 * 15.1 15.6 97
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Basin Index (%) 178 107
S. PLATTE
Black Mountain 8920 .1 -M * 18.7 -M *
Crow Creek 8330 .0 .0 * 15.0 15.8 95
Deadman Hill 10220 16.6 11.8 141 25.1 23.6 106
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Basin Index (%) 141* 102
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.4 19.0 113
Divide Peak 8880 4.9 .1 4900* 29.7 27.0 110
Elk River 8700 .0 .0 * 25.1 25.1 100
Little Snake River 8915 16.9 5.9 286 45.3 35.8 127
Old Battle 10000 40.2 28.2 143 45.8 43.1 106
Sage Creek Basin 7850 -M .0 * 20.3 17.7 115
Sandstone RS 8150 -M .0 * 23.0 23.0 100
Whiskey Park 8950 20.2 13.0 155 39.6 34.4 115
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Basin Index (%) 174* 111
UPPER GREEN RIVER
Big Sandy Opening 9080 6.6 .0 * 19.2 17.5 110
Blind Bull Sum 8650 22.2 15.8 141 24.3 23.9 102
East Rim Divide 7930 .0 .0 * 16.5 14.7 112
Elkhart Park G.S. 9400 10.5 2.1 500 19.3 17.4 111
Gros Ventre Summit 8750 .0 .9 0* 16.3 16.6 98
Gunsight Pass 9820 12.7 5.8 219 20.4 18.2 112
Indian Creek 9425 20.6 13.6 151 25.9 27.7 94
Kendall R.S. 7740 .0 .0 * 16.1 17.3 93
Loomis Park 8240 3.9 .0 * 22.3 21.1 106
New Fork Lake 8340 .0 .0 * 15.4 14.1 109
Pocket Creek 9360 10.2 -M * 19.0 -M *
Snider Basin 8060 .0 .0 * 18.0 17.2 105
Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103
Triple Peak 8500 -M 1.7 * -M 31.0 *
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Basin Index (%) 184* 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 17.4 -M *
Buck Pasture 9632 8.7 -M * 27.0 -M *
EF Blacks Fork GS 9360 .0 -M * 17.8 -M *
Hams Fork 7840 .0 .0 * 18.6 14.9 125
Hewinta 9500 .0 .0 * 20.1 18.2 110
Hickerson Park 9122 .1 .0 * 17.2 14.1 122
Hole-in-Rock 9168 .1 .0 * 16.8 13.6 124
Indian Creek 9425 20.6 13.6 151 25.9 27.7 94
Kelley R.S. 8180 4.7 .0 * 23.0 22.4 103
Spirit Lk 10235 13.3 -M * 23.9 -M *
Steel Creek Park 10158 16.0 11.2 143 25.6 21.6 119
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Basin Index (%) 167* 111
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 20.2 -M *
Bug Lake 7987 10.0 .0 * 31.5 24.1 131
Burts Miller Ranch 8000 .0 -M * 11.2 -M *
Chalk Creek #1 9171 19.4 9.5 204 37.5 31.6 119
Hayden Fork 9130 .0 .0 * 30.2 26.4 114
Kelley R.S. 8180 4.7 .0 * 23.0 22.4 103
Lily Lake 9133 .1 .0 * 22.1 22.0 100
Monte Cristo 8932 29.0 7.9 367 41.3 32.4 127
Salt River Summit 7640 .0 .0 * 22.2 20.5 108
Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103
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Basin Index (%) 261* 114
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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.