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: MAY 30 , 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 25.5 103
Black Bear 8170 38.0 26.9 141 53.2 46.1 115
Blind Bull Sum 8650 23.0 13.2 174 25.0 24.2 103
Cottonwood Creek 7670 5.8 .0 * 34.1 31.2 109
East Rim Divide 7930 .0 .0 * 17.1 14.9 115
Grand Targhee 9260 45.8 40.6 113 41.5 38.4 108
Granite Creek 6770 .0 .0 * 27.1 23.9 113
Grassy Lake 7265 -M 7.1 * -M 43.4 *
Gros Ventre Summit 8750 -M .0 * 16.7 16.9 99
Gunsight Pass 9820 12.6 4.0 315 20.8 18.5 112
Lewis Lake Divide 7850 18.4 13.6 135 45.5 42.4 107
Phillips Bench 8200 17.9 11.3 158 39.0 34.0 115
Salt River Summit 7640 .0 .0 * 22.7 20.7 110
Snake River Station 6920 .0 .0 * 30.4 27.6 110
Spring Creek Divide 9000 20.9 13.0 161 30.0 29.0 103
Thumb Divide 7980 .1 .0 * 23.9 23.7 101
Togwotee Pass 9580 24.5 20.0 122 31.7 30.8 103
Two Ocean Plateau 9240 28.1 26.0 108 31.7 34.2 93
Willow Creek 8080 16.4 5.5 298 45.4 42.4 107
Younts Peak 8350 -M 5.2 * -M 20.5 *
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Basin Index (%) 144 107
MADISON-GALLATIN
Black Bear 8170 38.0 26.9 141 53.2 46.1 115
Canyon 7870 .4 .0 * 20.6 20.8 99
Madison Plateau 7750 17.0 8.1 210 35.3 32.9 107
West Yellowstone 6700 .0 .0 * 22.0 18.4 120
Whiskey Creek 6800 3.8 .0 * 27.2 25.4 107
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Basin Index (%) 169* 110
YELLOWSTONE
Beartooth Lake 9360 25.3 18.4 138 27.7 25.1 110
Burnt Mtn 5880 .0 .0 * -M 20.6 *
Canyon 7870 .4 .0 * 20.6 20.8 99
Cole Creek 7850 20.4 10.8 189 23.8 21.1 113
Evening Star 9200 27.7 19.1 145 38.9 34.7 112
Fisher Creek 9100 33.3 28.9 115 44.4 39.8 112
Northeast Entrance 7350 .1 .0 * 19.1 16.5 116
Parker Peak 9400 26.3 15.1 174 32.1 23.6 136
Sylvan Lake 8420 12.0 8.6 140 34.0 29.1 117
Thumb Divide 7980 .1 .0 * 23.9 23.7 101
Two Ocean Plateau 9240 28.1 26.0 108 31.7 34.2 93
White Mill 8700 22.5 18.3 123 27.3 30.2 90
Wolverine 7650 .0 .0 * 18.3 16.4 112
Younts Peak 8350 -M 5.2 * -M 20.5 *
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Basin Index (%) 135 108
WIND RIVER
Burroughs Creek 8750 1.5 -M * 19.4 -M *
Castle Creek 8400 .0 -M * 12.0 -M *
Cold Springs 9630 3.1 .0 * 16.1 15.2 106
Deer Park 9700 14.1 4.6 307 26.5 26.9 99
Hobbs Park 10100 20.9 7.3 286 23.1 20.3 114
Kirwin 9550 10.1 2.8 361 20.0 16.8 119
Little Warm 9370 2.4 .0 * 12.2 18.2 67
Owl Creek 8975 4.2 .0 * 15.4 10.5 147
South Pass 9040 10.7 .5 2140* 20.3 23.4 87
St. Lawrence Alt 8620 -M .0 * -M 14.3 *
Togwotee Pass 9580 24.5 20.0 122 31.7 30.8 103
Townsend Creek 8700 8.4 .0 * 21.3 18.0 118
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Basin Index (%) 280* 104
BIGHORN BASIN
Bald Mtn. 9380 22.4 14.8 151 22.3 23.3 96
Bear Trap Meadow 8200 .0 .0 * 13.5 13.7 99
Bone Springs Div 9350 16.4 10.1 162 19.8 22.0 90
Grave Springs 8550 3.7 .0 * 16.0 16.0 100
Kirwin 9550 10.1 2.8 361 20.0 16.8 119
Marquette 8760 13.6 -M * 24.2 -M *
Middle Powder 7760 1.7 .0 * 17.7 17.2 103
Owl Creek 8975 4.2 .0 * 15.4 10.5 147
Powder River Pass 9480 3.6 .0 * 15.1 18.5 82
Shell Creek 9580 16.5 10.4 159 17.9 19.7 91
Timber Creek 7950 3.6 .0 * 19.2 13.3 144
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Basin Index (%) 216* 103
SHOSHONE RIVER
Blackwater 9780 30.3 21.0 144 35.0 27.2 129
Evening Star 9200 27.7 19.1 145 38.9 34.7 112
Marquette 8760 13.6 -M * 24.2 -M *
Sylvan Lake 8420 12.0 8.6 140 34.0 29.1 117
Sylvan Road 7120 .0 .0 * 20.3 21.2 96
Younts Peak 8350 -M 5.2 * -M 20.5 *
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Basin Index (%) 144 114
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 13.5 13.7 99
Cloud Peak Reservoir 9860 16.4 7.4 222 21.8 21.0 104
Grave Springs 8550 3.7 .0 * 16.0 16.0 100
Hansen Sawmill 8360 3.3 .0 * 17.2 14.0 123
Middle Powder 7760 1.7 .0 * 17.7 17.2 103
Powder River Pass 9480 3.6 .0 * 15.1 18.5 82
Soldier Park 8720 3.1 -M * 15.4 -M *
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Basin Index (%) 388* 101
TONGUE RIVER
Big Goose 7990 8.6 .0 * 21.3 18.1 118
Bone Springs Div 9350 16.4 10.1 162 19.8 22.0 90
Burgess Junction 7880 6.2 .4 1550* 16.8 17.9 94
Dome Lake 8880 10.1 .0 * 20.0 20.1 100
Little Goose 8870 12.1 -M * 15.5 -M *
Sucker Creek 8880 12.5 1.5 833 21.4 21.3 100
Tie Creek 6870 .1 .0 * 23.7 18.5 128
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Basin Index (%) 449* 104
BELLE FOURCHE
Blind Park 6890 .0 .0 * 11.8 18.1 65
Cole Canyon 5910 .0 .0 * 22.3 16.2 138
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Basin Index (%) * 99
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 11.8 18.1 65
North Rapid Creek 6130 -M .0 * 12.4 15.7 79
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Basin Index (%) * 72
UPPER N. PLATTE
Arapaho Ridge 10960 26.9 9.3 289 35.7 29.1 123
Blackhall Mtn 9820 29.4 -M * 42.3 -M *
Columbine 9160 6.5 .0 * 36.2 31.4 115
Divide Peak 8880 5.6 .0 * 31.0 27.3 114
Joe Wright 10120 22.5 15.1 149 38.2 34.1 112
Laprele Creek 8375 .0 .0 * 20.3 17.8 114
Med Bow 10500 42.2 -M * 44.9 -M *
Never Summer 10280 24.8 16.2 153 25.8 -M *
North French Creek 10130 30.4 22.2 137 38.7 34.9 111
Old Battle 10000 41.3 25.6 161 46.8 43.3 108
Rawah 9020 1.0 .0 * 23.2 19.4 120
Sage Creek Basin 7850 -M .0 * 21.1 17.8 119
Sand Lake 10050 32.6 21.5 152 32.8 32.9 100
South Brush Creek 8440 .0 .0 * 17.4 20.9 83
Tower 10500 58.0 38.7 150 57.8 49.0 118
Webber Springs 9250 17.9 .4 4475* 40.0 32.9 122
Whiskey Park 8950 21.4 8.8 243 40.6 34.7 117
Willow Creek Pass 9540 12.3 .9 1367* 22.9 18.3 125
Zirkel 9340 15.6 .0 * 46.1 33.9 136
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Basin Index (%) 200* 115
SWEETWATER
Deer Park 9700 14.1 4.6 307 26.5 26.9 99
Larsen Creek 9000 .0 .6 0* 18.1 -M *
South Pass 9040 10.7 .5 2140* 20.3 23.4 87
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Basin Index (%) 435* 93
LOWER N. PLATTE
Casper Mtn. 7900 7.4 .0 * 22.7 21.5 106
Laprele Creek 8375 .0 .0 * 20.3 17.8 114
Reno Hill 8400 11.0 .0 * 26.9 22.5 120
Windy Peak 7900 .3 .0 * 15.9 15.9 100
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Basin Index (%) * 110
LARAMIE RIVER
Brooklyn Lake 10240 18.8 6.9 272 34.0 28.2 121
Cinnabar Park 9574 14.9 2.8 532 31.2 30.1 104
Crow Creek 8330 .0 .0 * 16.0 15.9 101
Deadman Hill 10220 16.9 9.5 178 26.0 23.8 109
Rawah 9020 1.0 .0 * 23.2 19.4 120
Roach 9700 10.0 3.1 323 30.2 25.5 118
Windy Peak 7900 .3 .0 * 15.9 15.9 100
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Basin Index (%) 278 111
S. PLATTE
Black Mountain 8920 .2 -M * 19.6 -M *
Crow Creek 8330 .0 .0 * 16.0 15.9 101
Deadman Hill 10220 16.9 9.5 178 26.0 23.8 109
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Basin Index (%) 178* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 22.4 19.1 117
Divide Peak 8880 5.6 .0 * 31.0 27.3 114
Elk River 8700 .0 .0 * 25.8 25.3 102
Little Snake River 8915 17.4 3.3 527 46.6 36.0 129
Old Battle 10000 41.3 25.6 161 46.8 43.3 108
Sage Creek Basin 7850 -M .0 * 21.1 17.8 119
Sandstone RS 8150 -M .0 * 23.5 23.1 102
Whiskey Park 8950 21.4 8.8 243 40.6 34.7 117
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Basin Index (%) 227* 114
UPPER GREEN RIVER
Big Sandy Opening 9080 4.8 .0 * 19.5 17.7 110
Blind Bull Sum 8650 23.0 13.2 174 25.0 24.2 103
East Rim Divide 7930 .0 .0 * 17.1 14.9 115
Elkhart Park G.S. 9400 10.4 .5 2080* 20.5 17.7 116
Gros Ventre Summit 8750 -M .0 * 16.7 16.9 99
Gunsight Pass 9820 12.6 4.0 315 20.8 18.5 112
Indian Creek 9425 20.4 11.9 171 26.4 27.9 95
Kendall R.S. 7740 .0 .0 * 16.7 17.5 95
Loomis Park 8240 1.2 .0 * 23.0 21.3 108
New Fork Lake 8340 .0 .0 * 16.1 14.4 112
Pocket Creek 9360 9.2 -M * 19.2 -M *
Snider Basin 8060 .0 .0 * 18.2 17.4 105
Spring Creek Divide 9000 20.9 13.0 161 30.0 29.0 103
Triple Peak 8500 -M .0 * -M 31.4 *
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Basin Index (%) 219* 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 18.2 -M *
Buck Pasture 9632 8.0 -M * 27.4 -M *
EF Blacks Fork GS 9360 .0 -M * 18.6 -M *
Hams Fork 7840 .0 .0 * 19.4 15.1 128
Hewinta 9500 .0 .0 * 20.9 18.4 114
Hickerson Park 9122 .0 .0 * 17.7 14.2 125
Hole-in-Rock 9168 .0 .0 * 17.3 13.8 125
Indian Creek 9425 20.4 11.9 171 26.4 27.9 95
Kelley R.S. 8180 3.9 .0 * 23.7 22.7 104
Spirit Lk 10235 13.6 -M * 24.6 -M *
Steel Creek Park 10158 16.5 10.1 163 26.6 21.9 121
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Basin Index (%) 185* 113
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 20.4 -M *
Bug Lake 7987 8.1 .0 * 31.9 24.3 131
Burts Miller Ranch 8000 .0 -M * 11.3 -M *
Chalk Creek #1 9171 18.5 7.4 250 37.8 31.8 119
Hayden Fork 9130 .0 .0 * 30.5 26.6 115
Kelley R.S. 8180 3.9 .0 * 23.7 22.7 104
Lily Lake 9133 .0 .0 * 22.3 22.2 100
Monte Cristo 8932 27.7 5.6 495 41.6 32.6 128
Salt River Summit 7640 .0 .0 * 22.7 20.7 110
Spring Creek Divide 9000 20.9 13.0 161 30.0 29.0 103
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Basin Index (%) 304* 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.
