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 FRIDAY: MAY 31 , 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 * 26.0 25.6 102
Black Bear 8170 36.8 25.7 143 53.1 46.2 115
Blind Bull Sum 8650 23.3 12.3 189 25.0 24.3 103
Cottonwood Creek 7670 4.6 .0 * 34.1 31.3 109
East Rim Divide 7930 .0 .0 * 17.2 15.0 115
Grand Targhee 9260 45.2 40.3 112 41.5 38.6 108
Granite Creek 6770 .0 .0 * 27.3 24.0 114
Grassy Lake 7265 -M 5.9 * -M 43.6 *
Gros Ventre Summit 8750 -M .0 * 16.8 17.0 99
Gunsight Pass 9820 12.3 3.4 362 20.8 18.6 112
Lewis Lake Divide 7850 17.4 12.6 138 45.5 42.6 107
Phillips Bench 8200 16.8 10.5 160 39.0 34.1 114
Salt River Summit 7640 .0 .0 * 22.6 20.8 109
Snake River Station 6920 .0 .0 * 30.4 27.7 110
Spring Creek Divide 9000 20.2 12.3 164 30.1 29.1 103
Thumb Divide 7980 .0 .0 * 23.9 23.8 100
Togwotee Pass 9580 23.9 19.4 123 31.7 30.9 103
Two Ocean Plateau 9240 27.5 25.5 108 31.8 34.3 93
Willow Creek 8080 15.2 4.6 330 45.5 42.5 107
Younts Peak 8350 -M 4.1 * -M 20.6 *
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Basin Index (%) 146 107
MADISON-GALLATIN
Black Bear 8170 36.8 25.7 143 53.1 46.2 115
Canyon 7870 .4 .0 * 20.7 20.9 99
Madison Plateau 7750 16.1 7.1 227 35.3 33.0 107
West Yellowstone 6700 .0 .0 * 22.0 18.5 119
Whiskey Creek 6800 2.6 .0 * 27.5 25.6 107
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Basin Index (%) 170* 110
YELLOWSTONE
Beartooth Lake 9360 24.7 17.8 139 27.7 25.1 110
Burnt Mtn 5880 .0 .0 * -M 20.7 *
Canyon 7870 .4 .0 * 20.7 20.9 99
Cole Creek 7850 19.8 10.0 198 23.8 21.2 112
Evening Star 9200 27.1 18.5 146 38.9 34.8 112
Fisher Creek 9100 31.2 28.5 109 44.4 39.9 111
Northeast Entrance 7350 .0 .0 * 19.1 16.6 115
Parker Peak 9400 25.5 14.5 176 32.1 23.7 135
Sylvan Lake 8420 11.2 7.6 147 34.0 29.2 116
Thumb Divide 7980 .0 .0 * 23.9 23.8 100
Two Ocean Plateau 9240 27.5 25.5 108 31.8 34.3 93
White Mill 8700 21.3 17.6 121 27.3 30.3 90
Wolverine 7650 .0 .0 * 18.3 16.4 112
Younts Peak 8350 -M 4.1 * -M 20.6 *
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Basin Index (%) 135 108
WIND RIVER
Burroughs Creek 8750 .8 -M * 19.7 -M *
Castle Creek 8400 .0 -M * 12.0 -M *
Cold Springs 9630 2.6 .0 * 16.2 15.3 106
Deer Park 9700 14.0 3.9 359 26.5 27.0 98
Hobbs Park 10100 20.6 6.7 307 23.3 20.4 114
Kirwin 9550 9.7 2.2 441 20.0 16.9 118
Little Warm 9370 2.1 .0 * 12.5 18.4 68
Owl Creek 8975 3.7 .0 * 15.5 10.7 145
South Pass 9040 10.4 .4 2600* 20.3 23.5 86
St. Lawrence Alt 8620 -M .0 * -M 14.4 *
Togwotee Pass 9580 23.9 19.4 123 31.7 30.9 103
Townsend Creek 8700 7.9 .0 * 21.4 18.1 118
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Basin Index (%) 291* 103
BIGHORN BASIN
Bald Mtn. 9380 21.8 14.2 154 22.4 23.4 96
Bear Trap Meadow 8200 .0 .0 * 14.0 13.8 101
Bone Springs Div 9350 15.7 9.3 169 19.8 22.1 90
Grave Springs 8550 3.2 .0 * 16.5 16.1 102
Kirwin 9550 9.7 2.2 441 20.0 16.9 118
Marquette 8760 13.3 -M * 24.2 -M *
Middle Powder 7760 .9 .0 * 18.4 17.3 106
Owl Creek 8975 3.7 .0 * 15.5 10.7 145
Powder River Pass 9480 2.9 .0 * 15.0 18.6 81
Shell Creek 9580 15.9 9.7 164 17.9 19.8 90
Timber Creek 7950 3.0 .0 * 19.1 13.5 141
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Basin Index (%) 217* 104
SHOSHONE RIVER
Blackwater 9780 30.0 20.2 149 35.0 27.3 128
Evening Star 9200 27.1 18.5 146 38.9 34.8 112
Marquette 8760 13.3 -M * 24.2 -M *
Sylvan Lake 8420 11.2 7.6 147 34.0 29.2 116
Sylvan Road 7120 .0 .0 * 20.4 21.3 96
Younts Peak 8350 -M 4.1 * -M 20.6 *
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Basin Index (%) 148 114
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 14.0 13.8 101
Cloud Peak Reservoir 9860 16.0 6.2 258 21.8 21.1 103
Grave Springs 8550 3.2 .0 * 16.5 16.1 102
Hansen Sawmill 8360 2.5 .0 * 17.2 14.1 122
Middle Powder 7760 .9 .0 * 18.4 17.3 106
Powder River Pass 9480 2.9 .0 * 15.0 18.6 81
Soldier Park 8720 2.6 -M * 15.5 -M *
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Basin Index (%) 411* 102
TONGUE RIVER
Big Goose 7990 7.9 .0 * 21.3 18.1 118
Bone Springs Div 9350 15.7 9.3 169 19.8 22.1 90
Burgess Junction 7880 5.4 .1 5400* 17.1 18.0 95
Dome Lake 8880 9.7 .0 * 20.1 20.2 100
Little Goose 8870 11.5 -M * 15.6 -M *
Sucker Creek 8880 12.0 .6 2000* 21.5 21.4 100
Tie Creek 6870 .1 .0 * 23.7 18.6 127
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Basin Index (%) 508* 104
BELLE FOURCHE
Blind Park 6890 .0 .0 * 11.8 18.2 65
Cole Canyon 5910 .0 .0 * 22.2 16.5 135
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Basin Index (%) * 98
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.8 18.2 65
North Rapid Creek 6130 -M .0 * 12.3 15.8 78
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Basin Index (%) * 71
UPPER N. PLATTE
Arapaho Ridge 10960 26.8 8.5 315 35.7 29.1 123
Blackhall Mtn 9820 29.3 -M * 42.3 -M *
Columbine 9160 6.0 .0 * 36.2 31.4 115
Divide Peak 8880 5.4 .0 * 31.1 27.3 114
Joe Wright 10120 22.4 14.5 154 38.2 34.2 112
Laprele Creek 8375 .0 .0 * 20.6 17.9 115
Med Bow 10500 42.3 -M * 44.8 -M *
Never Summer 10280 24.8 15.9 156 25.8 -M *
North French Creek 10130 30.3 21.2 143 38.7 35.0 111
Old Battle 10000 41.3 24.8 167 46.9 43.4 108
Rawah 9020 .7 .0 * 23.2 19.5 119
Sage Creek Basin 7850 -M .0 * 21.1 17.8 119
Sand Lake 10050 32.3 20.9 155 32.8 33.0 99
South Brush Creek 8440 .0 .0 * 17.6 21.0 84
Tower 10500 57.8 37.4 155 58.0 49.1 118
Webber Springs 9250 17.9 .0 * 40.1 33.0 122
Whiskey Park 8950 21.4 7.5 285 40.6 34.8 117
Willow Creek Pass 9540 12.1 .0 * 22.9 18.4 124
Zirkel 9340 15.6 .0 * 46.1 33.9 136
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Basin Index (%) 209* 115
SWEETWATER
Deer Park 9700 14.0 3.9 359 26.5 27.0 98
Larsen Creek 9000 .0 .3 0* 18.1 -M *
South Pass 9040 10.4 .4 2600* 20.3 23.5 86
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Basin Index (%) 530* 93
LOWER N. PLATTE
Casper Mtn. 7900 6.6 .0 * 22.7 21.6 105
Laprele Creek 8375 .0 .0 * 20.6 17.9 115
Reno Hill 8400 10.3 .0 * 27.0 22.6 119
Windy Peak 7900 .2 .0 * 16.3 16.0 102
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Basin Index (%) * 111
LARAMIE RIVER
Brooklyn Lake 10240 18.9 5.9 320 34.0 28.3 120
Cinnabar Park 9574 14.7 1.9 774* 31.3 30.2 104
Crow Creek 8330 .0 .0 * 16.1 16.1 100
Deadman Hill 10220 16.8 8.7 193 26.0 24.0 108
Rawah 9020 .7 .0 * 23.2 19.5 119
Roach 9700 9.9 2.4 412 30.2 25.6 118
Windy Peak 7900 .2 .0 * 16.3 16.0 102
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Basin Index (%) 324* 111
S. PLATTE
Black Mountain 8920 .2 -M * 19.6 -M *
Crow Creek 8330 .0 .0 * 16.1 16.1 100
Deadman Hill 10220 16.8 8.7 193 26.0 24.0 108
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Basin Index (%) 193* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 22.4 19.2 117
Divide Peak 8880 5.4 .0 * 31.1 27.3 114
Elk River 8700 .0 .0 * 26.0 25.4 102
Little Snake River 8915 17.2 2.5 688* 46.5 36.1 129
Old Battle 10000 41.3 24.8 167 46.9 43.4 108
Sage Creek Basin 7850 -M .0 * 21.1 17.8 119
Sandstone RS 8150 -M .0 * 23.6 23.2 102
Whiskey Park 8950 21.4 7.5 285 40.6 34.8 117
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Basin Index (%) 245* 114
UPPER GREEN RIVER
Big Sandy Opening 9080 3.8 .0 * 19.5 17.8 110
Blind Bull Sum 8650 23.3 12.3 189 25.0 24.3 103
East Rim Divide 7930 .0 .0 * 17.2 15.0 115
Elkhart Park G.S. 9400 9.7 .2 4850* 20.5 17.8 115
Gros Ventre Summit 8750 -M .0 * 16.8 17.0 99
Gunsight Pass 9820 12.3 3.4 362 20.8 18.6 112
Indian Creek 9425 19.7 11.2 176 26.5 28.0 95
Kendall R.S. 7740 .0 .0 * 16.8 17.6 95
Loomis Park 8240 .6 .0 * 23.0 21.4 107
New Fork Lake 8340 .0 .0 * 16.2 14.5 112
Pocket Creek 9360 8.2 -M * 19.2 -M *
Snider Basin 8060 .0 .0 * 18.5 17.5 106
Spring Creek Divide 9000 20.2 12.3 164 30.1 29.1 103
Triple Peak 8500 -M .0 * -M 31.4 *
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Basin Index (%) 227* 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 18.3 -M *
Buck Pasture 9632 7.3 -M * 27.4 -M *
EF Blacks Fork GS 9360 .1 -M * 18.9 -M *
Hams Fork 7840 .0 .0 * 19.3 15.2 127
Hewinta 9500 .0 .0 * 21.0 18.5 114
Hickerson Park 9122 .0 .0 * 17.8 14.3 124
Hole-in-Rock 9168 .0 .0 * 17.3 13.9 124
Indian Creek 9425 19.7 11.2 176 26.5 28.0 95
Kelley R.S. 8180 2.8 .0 * 23.8 22.7 105
Spirit Lk 10235 13.7 -M * 24.8 -M *
Steel Creek Park 10158 16.2 9.7 167 26.8 22.0 122
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Basin Index (%) 185* 113
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 20.5 -M *
Bug Lake 7987 7.4 .0 * 32.0 24.4 131
Burts Miller Ranch 8000 .2 -M * 11.3 -M *
Chalk Creek #1 9171 18.0 6.7 269 38.2 31.9 120
Hayden Fork 9130 .0 .0 * 30.6 26.7 115
Kelley R.S. 8180 2.8 .0 * 23.8 22.7 105
Lily Lake 9133 .0 .0 * 22.3 22.3 100
Monte Cristo 8932 27.2 4.9 555 42.1 32.7 129
Salt River Summit 7640 .0 .0 * 22.6 20.8 109
Spring Creek Divide 9000 20.2 12.3 164 30.1 29.1 103
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Basin Index (%) 316* 115
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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.
