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: MARCH 29 , 2018
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 17.6 14.7 120 19.9 19.9 100
Black Bear 8170 40.1 35.4 113 39.7 36.1 110
Blind Bull Sum 8650 31.3 21.8 144 18.8 18.5 102
Cottonwood Creek 7670 21.2 20.9 101 24.3 23.3 104
East Rim Divide 7930 11.9 9.8 121 11.7 11.2 104
Grand Targhee 9260 44.9 35.4 127 28.3 28.7 99
Granite Creek 6770 17.6 14.9 118 20.2 18.9 107
Grassy Lake 7265 31.2 31.3 100 33.9 34.2 99
Gros Ventre Summit 8750 14.5 12.6 115 14.0 12.2 115
Gunsight Pass 9820 15.7 13.1 120 15.0 12.9 116
Lewis Lake Divide 7850 37.7 29.3 129 36.9 33.6 110
Phillips Bench 8200 26.8 23.8 113 26.8 26.7 100
Salt River Summit 7640 11.1 12.7 87 12.5 15.8 79
Snake River Station 6920 18.9 15.8 120 22.8 21.4 107
Spring Creek Divide 9000 26.1 22.4 117 23.9 22.6 106
Thumb Divide 7980 18.3 15.1 121 18.1 17.5 103
Togwotee Pass 9580 30.6 21.5 142 30.7 22.9 134
Two Ocean Plateau 9240 35.8 25.3 142 28.2 25.8 109
Willow Creek 8080 32.6 27.0 121 33.8 31.6 107
Younts Peak 8350 -M 13.9 * -M 14.9 *
----- -----
Basin Index (%) 120 106
MADISON-GALLATIN
Black Bear 8170 40.1 35.4 113 39.7 36.1 110
Canyon 7870 16.6 12.2 136 19.0 15.2 125
Madison Plateau 7750 26.7 21.1 127 26.4 24.9 106
West Yellowstone 6700 13.5 10.2 132 16.8 13.3 126
Whiskey Creek 6800 16.3 14.8 110 18.9 19.1 99
----- -----
Basin Index (%) 121 111
YELLOWSTONE
Beartooth Lake 9360 36.9 20.7 178 33.3 18.5 180
Burnt Mtn 5880 6.8 4.5 151 13.1 11.6 113
Canyon 7870 16.6 12.2 136 19.0 15.2 125
Cole Creek 7850 13.5 13.0 104 -M 11.7 *
Evening Star 9200 38.6 23.8 162 41.5 25.7 161
Fisher Creek 9100 50.1 29.4 170 44.3 30.0 148
Northeast Entrance 7350 13.6 9.8 139 17.5 11.5 152
Parker Peak 9400 31.9 18.5 172 27.8 16.5 168
Sylvan Lake 8420 24.3 18.9 129 25.5 21.0 121
Thumb Divide 7980 18.3 15.1 121 18.1 17.5 103
Two Ocean Plateau 9240 35.8 25.3 142 28.2 25.8 109
White Mill 8700 39.1 21.3 184 30.3 22.3 136
Wolverine 7650 20.2 8.9 227 19.7 11.4 173
----- -----
Basin Index (%) 156 140
WIND RIVER
Burroughs Creek 8750 15.8 -M * 17.1 -M *
Castle Creek 8400 8.2 -M * 9.3 -M *
Cold Springs 9630 9.7 7.1 137 9.5 9.2 103
Deer Park 9700 12.3 14.3 86 15.0 18.3 82
Hobbs Park 10100 16.6 13.0 128 14.3 12.1 118
Kirwin 9550 19.0 9.1 209 17.0 10.7 159
Little Warm 9370 15.1 10.1 150 15.7 12.0 131
Owl Creek 8975 4.3 5.1 84 5.9 5.5 107
South Pass 9040 11.7 14.6 80 8.2 16.3 50
St. Lawrence Alt 8620 3.2 6.7 48 8.2 8.2 100
Togwotee Pass 9580 30.6 21.5 142 30.7 22.9 134
Townsend Creek 8700 6.9 8.8 78 8.6 11.0 78
----- -----
Basin Index (%) 117 105
BIGHORN BASIN
Bald Mtn. 9380 19.9 17.8 112 14.1 15.9 89
Bear Trap Meadow 8200 -M 5.1 * 10.6 7.7 138
Bone Springs Div 9350 18.2 15.1 121 13.9 14.4 97
Grave Springs 8550 7.1 8.6 83 -M 9.7 *
Kirwin 9550 19.0 9.1 209 17.0 10.7 159
Marquette 8760 5.7 -M * 9.5 -M *
Middle Powder 7760 9.2 10.8 85 -M 10.8 *
Owl Creek 8975 4.3 5.1 84 5.9 5.5 107
Powder River Pass 9480 16.0 9.8 163 15.1 11.6 130
Shell Creek 9580 20.3 14.0 145 15.4 12.8 120
Timber Creek 7950 3.4 4.5 76 -M 6.8 *
----- -----
Basin Index (%) 124 117
SHOSHONE RIVER
Blackwater 9780 32.6 21.7 150 30.4 19.2 158
Evening Star 9200 38.6 23.8 162 41.5 25.7 161
Marquette 8760 5.7 -M * 9.5 -M *
Sylvan Road 7120 13.7 11.0 125 20.2 15.8 128
Younts Peak 8350 -M 13.9 * -M 14.9 *
----- -----
Basin Index (%) 150 152
POWDER RIVER
Bear Trap Meadow 8200 -M 5.1 * 10.6 7.7 138
Cloud Peak Reservoir 9860 15.3 13.7 112 13.8 12.2 113
Grave Springs 8550 7.1 8.6 83 -M 9.7 *
Hansen Sawmill 8360 8.7 6.2 140 10.1 7.9 128
Middle Powder 7760 9.2 10.8 85 -M 10.8 *
Powder River Pass 9480 16.0 9.8 163 15.1 11.6 130
Soldier Park 8720 7.2 -M * 9.8 -M *
----- -----
Basin Index (%) 115 126
TONGUE RIVER
Big Goose 7990 7.9 8.4 94 8.1 10.1 80
Bone Springs Div 9350 18.2 15.1 121 13.9 14.4 97
Burgess Junction 7880 9.3 10.9 85 7.6 11.4 67
Dome Lake 8880 14.3 11.2 128 11.5 12.5 92
Little Goose 8870 9.7 -M * 11.6 -M *
Sucker Creek 8880 10.4 11.2 93 7.9 13.2 60
Tie Creek 6870 4.4 5.4 81 8.4 10.5 80
----- -----
Basin Index (%) 104 80
BELLE FOURCHE
Cole Canyon 5910 7.0 5.7 123 9.4 8.4 112
----- -----
Basin Index (%) 123 112
CHEYENNE RIVER BASIN
Blind Park 6890 7.4 7.2 103 10.6 11.0 96
North Rapid Creek 6130 6.9 6.7 103 8.2 9.0 91
----- -----
Basin Index (%) 103 94
UPPER N. PLATTE
Arapaho Ridge 10960 19.3 19.3 100 18.9 20.8 91
Blackhall Mtn 9820 26.8 -M * 26.0 -M *
Columbine 9160 21.7 22.3 97 22.4 24.0 93
Divide Peak 8880 13.8 19.1 72 17.2 20.1 86
Joe Wright 10120 18.2 19.9 91 27.6 24.2 114
Laprele Creek 8375 6.0 9.4 64 7.4 11.5 64
Med Bow 10500 38.3 -M * 30.7 -M *
North French Creek 10130 26.5 27.3 97 25.7 25.2 102
Never Summer 10280 18.3 19.1 96 15.0 -M *
Old Battle 10000 24.4 28.6 85 23.0 32.9 70
Rawah 9020 11.0 10.1 109 14.5 13.1 111
Sage Creek Basin 7850 8.2 12.5 66 10.0 13.6 74
Sand Lake 10050 25.0 26.7 94 21.3 23.1 92
South Brush Creek 8440 10.0 12.1 83 11.4 14.2 80
Tower 10500 34.1 42.7 80 26.3 37.5 70
Webber Springs 9250 18.0 22.6 80 20.7 25.1 82
Willow Creek Pass 9540 12.9 11.6 111 13.7 12.5 110
Zirkel 9340 26.3 26.2 100 29.9 26.8 112
----- -----
Basin Index (%) 89 89
SWEETWATER
Deer Park 9700 12.3 14.3 86 15.0 18.3 82
Larsen Creek 9000 11.1 11.9 93 11.1 -M *
South Pass 9040 11.7 14.6 80 8.2 16.3 50
----- -----
Basin Index (%) 86 67
LOWER N. PLATTE
Casper Mtn. 7900 7.4 12.9 57 6.2 13.7 45
Laprele Creek 8375 6.0 9.4 64 7.4 11.5 64
Reno Hill 8400 9.4 12.8 73 10.6 14.1 75
Windy Peak 7900 6.1 7.7 79 7.5 9.7 77
----- -----
Basin Index (%) 68 65
LARAMIE RIVER
Brooklyn Lake 10240 23.6 19.1 124 23.5 19.6 120
Cinnabar Park 9574 20.1 19.6 103 23.4 22.7 103
Crow Creek 8330 4.2 6.8 62 10.5 9.9 106
Deadman Hill 10220 19.8 15.1 131 18.9 16.0 118
Rawah 9020 11.0 10.1 109 14.5 13.1 111
Roach 9700 13.1 15.0 87 16.4 17.9 92
----- -----
Basin Index (%) 107 108
S. PLATTE
Black Mountain 8920 10.4 -M * 13.0 -M *
Crow Creek 8330 4.2 6.8 62 10.5 9.9 106
Deadman Hill 10220 19.8 15.1 131 18.9 16.0 118
----- -----
Basin Index (%) 110 114
LITTLE SNAKE RIVER
Battle Mountain 7440 6.5 10.9 60 8.9 14.2 63
Divide Peak 8880 13.8 19.1 72 17.2 20.1 86
Elk River 8700 15.0 18.0 83 15.8 18.9 84
Little Snake River 8915 20.5 22.3 92 26.6 27.8 96
Old Battle 10000 24.4 28.6 85 23.0 32.9 70
Sage Creek Basin 7850 8.2 12.5 66 10.0 13.6 74
Sandstone RS 8150 9.1 13.1 69 8.7 17.4 50
Whiskey Park 8950 23.3 25.0 93 24.4 26.4 92
----- -----
Basin Index (%) 81 79
UPPER GREEN RIVER
Big Sandy Opening 9080 13.0 12.2 107 12.8 12.5 102
Blind Bull Sum 8650 31.3 21.8 144 18.8 18.5 102
East Rim Divide 7930 11.9 9.8 121 11.7 11.2 104
Elkhart Park G.S. 9400 12.0 11.7 103 11.5 12.5 92
Gros Ventre Summit 8750 14.5 12.6 115 14.0 12.2 115
Gunsight Pass 9820 15.7 13.1 120 15.0 12.9 116
Kendall R.S. 7740 14.4 11.3 127 14.6 13.6 107
Loomis Park 8240 17.1 14.4 119 17.6 16.4 107
New Fork Lake 8340 11.8 10.2 116 10.9 10.2 107
Pocket Creek 9360 8.7 -M * 8.8 -M *
Snider Basin 8060 12.7 11.8 108 14.4 13.4 107
Spring Creek Divide 9000 26.1 22.4 117 23.9 22.6 106
Triple Peak 8500 28.8 21.1 136 29.7 24.0 124
----- -----
Basin Index (%) 121 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.7 -M * 8.6 -M *
Buck Pasture 9632 12.1 -M * 12.9 -M *
EF Blacks Fork GS 9360 10.7 -M * 5.9 -M *
Hams Fork 7840 9.3 10.6 88 9.2 10.8 85
Hewinta 9500 9.2 10.4 88 11.0 13.1 84
Hickerson Park 9122 6.5 7.2 90 7.6 9.4 81
Hole-in-Rock 9168 7.5 7.0 107 8.1 8.9 91
Indian Creek 9425 21.1 23.2 91 15.4 21.3 72
Kelley R.S. 8180 13.1 14.7 89 14.2 17.2 83
Spirit Lk 10235 10.5 -M * 11.8 -M *
Steel Creek Park 10158 13.4 14.6 92 13.5 15.3 88
----- -----
Basin Index (%) 91 82
UPPER BEAR RIVER
Bear River RS 8777 8.4 -M * 10.3 -M *
Bug Lake 7987 14.9 17.9 83 15.6 18.3 85
Burts Miller Ranch 8000 6.1 -M * 6.3 -M *
Chalk Creek #1 9171 14.9 22.7 66 15.9 23.6 67
Hayden Fork 9130 13.9 14.8 94 15.7 19.7 80
Kelley R.S. 8180 13.1 14.7 89 14.2 17.2 83
Lily Lake 9133 9.5 11.9 80 11.2 16.0 70
Monte Cristo 8932 21.5 25.6 84 21.0 24.5 86
Salt River Summit 7640 11.1 12.7 87 12.5 15.8 79
----- -----
Basin Index (%) 82 79
-----------------------------------------------------------------------------
-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.