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: DECEMBER 14 , 2018
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 4.6 5.3 87 6.6 7.9 84
Black Bear 8170 -M 12.8 * -M 13.9 *
Blind Bull Sum 8650 5.7 6.8 84 5.7 7.4 77
Cottonwood Creek 7670 6.5 6.2 105 8.8 8.8 100
East Rim Divide 7930 2.6 2.8 93 3.9 4.3 91
Grand Targhee 9260 -M 12.4 * -M 11.6 *
Granite Creek 6770 -M 4.1 * -M 7.2 *
Grassy Lake 7265 8.0 9.0 89 11.6 12.9 90
Gros Ventre Summit 8750 2.7 4.6 59 3.5 5.0 70
Gunsight Pass 9820 3.3 4.2 79 5.8 5.0 116
Lewis Lake Divide 7850 6.6 9.4 70 10.5 13.0 81
Phillips Bench 8200 5.3 7.8 68 9.0 9.8 92
Salt River Summit 7640 3.1 3.1 100 5.3 5.7 93
Snake River Station 6920 4.6 4.5 102 9.0 8.7 103
Spring Creek Divide 9000 6.6 7.1 93 8.1 8.5 95
Thumb Divide 7980 2.4 4.2 57 5.0 6.9 72
Togwotee Pass 9580 8.0 8.7 92 9.0 9.2 98
Two Ocean Plateau 9240 9.2 10.3 89 8.1 10.2 79
Willow Creek 8080 7.7 7.8 99 12.1 12.3 98
Younts Peak 8350 -M 5.2 * -M 6.2 *
----- -----
Basin Index (%) 85 90
MADISON-GALLATIN
Black Bear 8170 -M 12.8 * -M 13.9 *
Canyon 7870 3.0 3.7 81 4.8 6.0 80
Madison Plateau 7750 4.6 7.3 63 6.6 9.6 69
West Yellowstone 6700 2.5 2.9 86 3.9 5.3 74
Whiskey Creek 6800 2.3 4.4 52 3.1 7.7 40
----- -----
Basin Index (%) 68 64
YELLOWSTONE
Beartooth Lake 9360 5.9 7.5 79 5.1 7.0 73
Burnt Mtn 5880 2.3 1.5 153 6.0 5.9 102
Canyon 7870 3.0 3.7 81 4.8 6.0 80
Cole Creek 7850 6.5 5.4 120 6.1 5.6 109
Evening Star 9200 -M 8.6 * -M 10.5 *
Fisher Creek 9100 7.8 11.0 71 11.4 11.8 97
Northeast Entrance 7350 3.3 2.5 132 5.8 5.0 116
Parker Peak 9400 8.5 7.5 113 9.6 6.9 139
Sylvan Lake 8420 -M 6.7 * -M 9.0 *
Thumb Divide 7980 2.4 4.2 57 5.0 6.9 72
Two Ocean Plateau 9240 9.2 10.3 89 8.1 10.2 79
White Mill 8700 6.0 7.4 81 5.4 8.9 61
Wolverine 7650 3.1 3.2 97 5.1 5.0 102
----- -----
Basin Index (%) 90 91
WIND RIVER
Burroughs Creek 8750 2.6 -M * 4.1 -M *
Castle Creek 8400 1.2 -M * 2.4 -M *
Cold Springs 9630 2.3 2.6 88 2.7 4.3 63
Deer Park 9700 4.5 4.9 92 4.9 7.0 70
Hobbs Park 10100 3.9 5.7 68 3.6 5.3 68
Kirwin 9550 -M 3.9 * -M 4.7 *
Little Warm 9370 2.3 3.6 64 3.3 5.1 65
Owl Creek 8975 2.6 2.1 124 3.2 2.5 128
South Pass 9040 3.5 5.1 69 4.1 6.9 59
St. Lawrence Alt 8620 1.5 2.6 58 3.4 3.7 92
Togwotee Pass 9580 8.0 8.7 92 9.0 9.2 98
Townsend Creek 8700 3.0 3.1 97 4.0 5.0 80
----- -----
Basin Index (%) 82 78
BIGHORN BASIN
Bald Mtn. 9380 7.9 6.6 120 5.3 6.3 84
Bear Trap Meadow 8200 3.6 1.9 189 3.8 3.6 106
Bone Springs Div 9350 -M 6.0 * -M 5.8 *
Grave Springs 8550 3.0 2.4 125 4.7 4.2 112
Kirwin 9550 -M 3.9 * -M 4.7 *
Marquette 8760 3.3 -M * 4.2 -M *
Middle Powder 7760 3.8 3.5 109 3.2 5.1 63
Owl Creek 8975 2.6 2.1 124 3.2 2.5 128
Powder River Pass 9480 4.2 3.6 117 4.0 4.8 83
Shell Creek 9580 -M 5.6 * -M 5.4 *
Timber Creek 7950 -M 2.0 * -M 3.5 *
----- -----
Basin Index (%) 125 91
SHOSHONE RIVER
Blackwater 9780 9.0 8.2 110 9.4 8.1 116
Evening Star 9200 -M 8.6 * -M 10.5 *
Marquette 8760 3.3 -M * 4.2 -M *
Sylvan Road 7120 4.6 3.9 118 7.4 7.3 101
Younts Peak 8350 -M 5.2 * -M 6.2 *
----- -----
Basin Index (%) 112* 109*
POWDER RIVER
Bear Trap Meadow 8200 3.6 1.9 189 3.8 3.6 106
Cloud Peak Reservoir 9860 5.5 4.7 117 5.6 5.3 106
Grave Springs 8550 3.0 2.4 125 4.7 4.2 112
Hansen Sawmill 8360 -M 2.1 * -M 3.5 *
Middle Powder 7760 3.8 3.5 109 3.2 5.1 63
Powder River Pass 9480 4.2 3.6 117 4.0 4.8 83
Soldier Park 8720 2.0 -M * 3.8 -M *
----- -----
Basin Index (%) 125 93
TONGUE RIVER
Big Goose 7990 2.9 3.0 97 5.3 4.5 118
Bone Springs Div 9350 -M 6.0 * -M 5.8 *
Burgess Junction 7880 3.4 3.7 92 4.3 4.8 90
Dome Lake 8880 -M 4.3 * -M 5.6 *
Little Goose 8870 -M -M * -M -M *
Sucker Creek 8880 5.0 4.0 125 4.9 5.5 89
Tie Creek 6870 1.7 1.1 155 5.5 4.6 120
----- -----
Basin Index (%) 110 103
BELLE FOURCHE
Cole Canyon 5910 2.2 1.1 200 4.8 4.0 120
----- -----
Basin Index (%) 200 120
CHEYENNE RIVER BASIN
Blind Park 6890 2.6 2.0 130 3.0 4.9 61
North Rapid Creek 6130 2.0 2.3 87 2.8 4.1 68
----- -----
Basin Index (%) 107 64
UPPER N. PLATTE
Arapaho Ridge 10960 8.8 7.1 124 10.1 8.8 115
Blackhall Mtn 9820 9.7 -M * 13.0 -M *
Columbine 9160 7.5 6.1 123 10.3 9.0 114
Divide Peak 8880 5.7 5.9 97 8.6 8.2 105
Joe Wright 10120 7.1 7.5 95 13.0 9.8 133
Laprele Creek 8375 4.6 2.9 159 5.9 4.8 123
Med Bow 10500 14.9 -M * 15.8 -M *
North French Creek 10130 12.0 8.9 135 14.0 9.4 149
Never Summer 10280 -M 6.4 * -M -M *
Old Battle 10000 11.5 9.6 120 13.8 12.7 109
Rawah 9020 3.4 3.3 103 6.1 5.9 103
Sage Creek Basin 7850 4.0 3.8 105 6.6 5.6 118
Sand Lake 10050 -M 8.9 * -M 9.0 *
South Brush Creek 8440 4.3 3.4 126 5.4 5.8 93
Tower 10500 16.1 14.8 109 15.0 14.6 103
Webber Springs 9250 7.1 7.3 97 10.8 9.7 111
Willow Creek Pass 9540 5.6 4.2 133 7.3 5.4 135
Zirkel 9340 8.5 6.8 125 13.0 10.7 121
----- -----
Basin Index (%) 116 116
SWEETWATER
Deer Park 9700 4.5 4.9 92 4.9 7.0 70
Larsen Creek 9000 -M 3.5 * -M -M *
South Pass 9040 3.5 5.1 69 4.1 6.9 59
----- -----
Basin Index (%) 80 65
LOWER N. PLATTE
Casper Mtn. 7900 4.6 4.3 107 4.7 6.2 76
Laprele Creek 8375 4.6 2.9 159 5.9 4.8 123
Reno Hill 8400 5.3 4.7 113 6.5 5.9 110
Windy Peak 7900 4.1 2.3 178 4.3 4.3 100
----- -----
Basin Index (%) 131 101
LARAMIE RIVER
Brooklyn Lake 10240 8.4 6.0 140 10.3 7.2 143
Cinnabar Park 9574 8.2 7.1 115 10.5 9.0 117
Crow Creek 8330 1.5 3.5 43 4.4 4.4 100
Deadman Hill 10220 6.6 5.4 122 6.9 6.3 110
Rawah 9020 3.4 3.3 103 6.1 5.9 103
Roach 9700 -M 4.9 * -M 7.0 *
----- -----
Basin Index (%) 111 116
S. PLATTE
Black Mountain 8920 3.0 -M * 4.2 -M *
Crow Creek 8330 1.5 3.5 43 4.4 4.4 100
Deadman Hill 10220 6.6 5.4 122 6.9 6.3 110
----- -----
Basin Index (%) 91 106
LITTLE SNAKE RIVER
Battle Mountain 7440 4.4 2.5 176 4.1 5.6 73
Divide Peak 8880 5.7 5.9 97 8.6 8.2 105
Elk River 8700 4.9 4.5 109 6.0 7.1 85
Little Snake River 8915 8.0 5.3 151 15.3 11.5 133
Old Battle 10000 11.5 9.6 120 13.8 12.7 109
Sage Creek Basin 7850 4.0 3.8 105 6.6 5.6 118
Sandstone RS 8150 5.3 3.3 161 7.0 6.8 103
Whiskey Park 8950 8.5 7.0 121 12.4 9.4 132
----- -----
Basin Index (%) 125 110
UPPER GREEN RIVER
Big Sandy Opening 9080 3.6 4.5 80 4.8 5.0 96
Blind Bull Sum 8650 5.7 6.8 84 5.7 7.4 77
East Rim Divide 7930 2.6 2.8 93 3.9 4.3 91
Elkhart Park G.S. 9400 4.0 4.1 98 5.2 5.1 102
Gros Ventre Summit 8750 2.7 4.6 59 3.5 5.0 70
Gunsight Pass 9820 3.3 4.2 79 5.8 5.0 116
Kendall R.S. 7740 2.7 3.4 79 4.0 5.1 78
Loomis Park 8240 4.3 4.4 98 5.8 6.2 94
New Fork Lake 8340 -M 3.2 * -M 4.1 *
Pocket Creek 9360 5.4 -M * 6.2 -M *
Snyder Basin 8060 3.4 3.5 97 5.4 5.0 108
Spring Creek Divide 9000 6.6 7.1 93 8.1 8.5 95
Triple Peak 8500 6.9 6.1 113 9.1 8.7 105
----- -----
Basin Index (%) 89 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.3 -M * 5.0 -M *
Buck Pasture 9632 4.6 -M * 8.1 -M *
EF Blacks Fork GS 9360 3.3 -M * 4.6 -M *
Hams Fork 7840 3.1 3.2 97 4.7 4.1 115
Hewinta 9500 2.6 2.6 100 5.7 5.5 104
Hickerson Park 9122 2.3 1.9 121 4.7 4.3 109
Hole-in-Rock 9168 1.6 2.2 73 4.6 4.0 115
Indian Creek 9425 5.7 7.4 77 5.5 7.6 72
Kelley R.S. 8180 4.2 4.2 100 5.5 6.5 85
Spirit Lk 10235 -M -M * -M -M *
Steel Creek Park 10158 4.9 5.1 96 6.9 6.2 111
----- -----
Basin Index (%) 92 98
UPPER BEAR RIVER
Bear River RS 8777 -M -M * -M -M *
Bug Lake 7987 3.8 4.8 79 8.2 7.2 114
Burts Miller Ranch 8000 1.0 -M * 3.0 -M *
Chalk Creek #1 9171 5.1 7.8 65 10.5 9.5 111
Hayden Fork 9130 -M 3.9 * -M 7.7 *
Kelley R.S. 8180 4.2 4.2 100 5.5 6.5 85
Lily Lake 9133 3.6 4.0 90 6.5 6.6 98
Monte Cristo 8932 -M 7.4 * -M 9.2 *
Salt River Summit 7640 3.1 3.1 100 5.3 5.7 93
----- -----
Basin Index (%) 83 101
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.
