Supercell over Laramie
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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: JANUARY 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 12.0 10.7 112 13.6 13.7 99 Black Bear 8170 26.5 23.1 115 25.6 24.4 105 Blind Bull Sum 8650 19.4 13.4 145 12.1 12.6 96 Cottonwood Creek 7670 13.6 12.3 111 15.5 15.5 100 East Rim Divide 7930 7.1 6.7 106 7.2 7.5 96 Grand Targhee 9260 32.2 23.3 138 19.6 20.3 97 Granite Creek 6770 10.3 10.0 103 13.2 13.3 99 Grassy Lake 7265 19.0 19.5 97 22.7 23.4 97 Gros Ventre Summit 8750 9.6 8.2 117 9.0 8.0 112 Gunsight Pass 9820 9.5 8.1 117 9.8 8.7 113 Lewis Lake Divide 7850 21.6 19.3 112 24.5 22.7 108 Phillips Bench 8200 14.3 15.9 90 15.7 17.8 88 Salt River Summit 7640 6.2 7.5 83 8.1 10.4 78 Snake River Station 6920 11.4 10.3 111 15.8 15.1 105 Spring Creek Divide 9000 15.8 13.8 114 15.4 15.0 103 Thumb Divide 7980 11.8 9.4 126 12.7 12.0 106 Togwotee Pass 9580 19.4 14.7 132 19.8 15.5 128 Two Ocean Plateau 9240 25.0 16.8 149 18.6 16.9 110 Willow Creek 8080 19.4 16.8 115 22.2 21.2 105 Younts Peak 8350 -M 9.2 * -M 10.3 * ----- ----- Basin Index (%) 117 102 MADISON-GALLATIN Black Bear 8170 26.5 23.1 115 25.6 24.4 105 Canyon 7870 10.9 8.0 136 12.6 10.5 120 Madison Plateau 7750 16.2 14.0 116 17.1 17.1 100 West Yellowstone 6700 8.2 6.9 119 11.1 9.5 117 Whiskey Creek 6800 9.8 9.5 103 12.0 13.0 92 ----- ----- Basin Index (%) 116 105 YELLOWSTONE Beartooth Lake 9360 23.9 13.5 177 22.0 12.6 175 Burnt Mtn 5880 3.6 2.4 150 9.0 7.8 115 Canyon 7870 10.9 8.0 136 12.6 10.5 120 Cole Creek 7850 9.2 8.1 114 6.1 7.5 81 Evening Star 9200 25.0 15.8 158 26.7 17.6 152 Fisher Creek 9100 32.5 20.2 161 26.6 20.4 130 Northeast Entrance 7350 7.4 6.2 119 10.8 8.1 133 Parker Peak 9400 21.5 12.6 171 18.8 11.2 168 Sylvan Lake 8420 15.4 12.7 121 17.2 14.5 119 Thumb Divide 7980 11.8 9.4 126 12.7 12.0 106 Two Ocean Plateau 9240 25.0 16.8 149 18.6 16.9 110 White Mill 8700 25.1 14.2 177 18.2 15.1 121 Wolverine 7650 11.4 6.8 168 13.7 8.0 171 ----- ----- Basin Index (%) 152 131 WIND RIVER Burroughs Creek 8750 9.5 -M * 11.4 -M * Castle Creek 8400 5.4 -M * 6.7 -M * Cold Springs 9630 6.1 4.3 142 6.5 6.1 107 Deer Park 9700 7.7 8.9 87 9.3 12.1 77 Hobbs Park 10100 11.1 7.9 141 9.4 7.6 124 Kirwin 9550 12.2 5.7 214 10.9 7.1 154 Little Warm 9370 10.5 6.1 172 10.7 8.0 134 Owl Creek 8975 2.8 3.1 90 4.4 3.5 126 South Pass 9040 7.3 8.3 88 5.1 10.7 48 St. Lawrence Alt 8620 2.8 4.1 68 6.0 5.2 115 Togwotee Pass 9580 19.4 14.7 132 19.8 15.5 128 Townsend Creek 8700 4.8 5.0 96 6.0 6.9 87 ----- ----- Basin Index (%) 124 107 BIGHORN BASIN Bald Mtn. 9380 12.2 10.6 115 8.3 10.5 79 Bear Trap Meadow 8200 4.9 3.4 144 6.0 5.1 118 Bone Springs Div 9350 10.4 9.7 107 8.0 9.4 85 Grave Springs 8550 4.3 4.9 88 3.6 6.3 57 Kirwin 9550 12.2 5.7 214 10.9 7.1 154 Marquette 8760 3.6 -M * 6.8 -M * Middle Powder 7760 5.4 6.2 87 3.9 7.2 54 Owl Creek 8975 2.8 3.1 90 4.4 3.5 126 Powder River Pass 9480 9.3 6.2 150 8.0 7.7 104 Shell Creek 9580 12.3 9.0 137 8.6 8.7 99 Timber Creek 7950 2.2 3.0 73 -M 4.4 * ----- ----- Basin Index (%) 123 94 SHOSHONE RIVER Blackwater 9780 22.8 14.4 158 20.3 13.0 156 Evening Star 9200 25.0 15.8 158 26.7 17.6 152 Marquette 8760 3.6 -M * 6.8 -M * Sylvan Road 7120 9.2 7.7 119 13.7 11.6 118 Younts Peak 8350 -M 9.2 * -M 10.3 * ----- ----- Basin Index (%) 150 144 POWDER RIVER Bear Trap Meadow 8200 4.9 3.4 144 6.0 5.1 118 Cloud Peak Reservoir 9860 8.7 8.1 107 8.2 7.8 105 Grave Springs 8550 4.3 4.9 88 3.6 6.3 57 Hansen Sawmill 8360 4.2 4.0 105 5.5 5.0 110 Middle Powder 7760 5.4 6.2 87 3.9 7.2 54 Powder River Pass 9480 9.3 6.2 150 8.0 7.7 104 Soldier Park 8720 2.9 -M * 5.9 -M * ----- ----- Basin Index (%) 112 90 TONGUE RIVER Big Goose 7990 4.0 4.8 83 4.5 6.4 70 Bone Springs Div 9350 10.4 9.7 107 8.0 9.4 85 Burgess Junction 7880 4.9 6.5 75 4.5 7.3 62 Dome Lake 8880 6.9 6.6 105 6.2 8.2 76 Little Goose 8870 4.9 -M * 6.9 -M * Sucker Creek 8880 5.4 7.0 77 -M 8.5 * Tie Creek 6870 2.0 3.3 61 5.1 6.9 74 ----- ----- Basin Index (%) 89 74 BELLE FOURCHE Cole Canyon 5910 3.6 3.2 112 5.2 5.6 93 ----- ----- Basin Index (%) 112 93 CHEYENNE RIVER BASIN Blind Park 6890 4.4 4.4 100 6.6 7.6 87 North Rapid Creek 6130 4.6 4.2 110 5.0 6.1 82 ----- ----- Basin Index (%) 105 85 UPPER N. PLATTE Arapaho Ridge 10960 11.9 12.8 93 11.9 13.8 86 Blackhall Mtn 9820 15.7 -M * 16.0 -M * Columbine 9160 5.2 14.3 36 13.9 16.0 87 Divide Peak 8880 8.6 12.0 72 11.9 13.4 89 Joe Wright 10120 10.1 12.7 80 17.3 15.7 110 Laprele Creek 8375 4.1 5.3 77 5.7 7.4 77 Med Bow 10500 25.3 -M * 21.5 -M * North French Creek 10130 17.2 15.8 109 17.5 16.6 105 Never Summer 10280 10.6 12.0 88 9.0 -M * Old Battle 10000 14.8 18.8 79 14.3 21.9 65 Rawah 9020 6.7 6.0 112 9.7 8.9 109 Sage Creek Basin 7850 5.8 8.1 72 7.2 9.6 75 Sand Lake 10050 16.3 16.1 101 13.4 14.8 91 South Brush Creek 8440 6.0 7.2 83 7.7 9.4 82 Tower 10500 18.1 26.8 68 18.9 25.0 76 Webber Springs 9250 10.7 13.2 81 13.0 16.6 78 Willow Creek Pass 9540 8.2 7.2 114 8.7 8.1 107 Zirkel 9340 12.4 17.9 69 17.4 18.3 95 ----- ----- Basin Index (%) 81 87 SWEETWATER Deer Park 9700 7.7 8.9 87 9.3 12.1 77 Larsen Creek 9000 4.9 7.1 69 7.4 -M * South Pass 9040 7.3 8.3 88 5.1 10.7 48 ----- ----- Basin Index (%) 82 63 LOWER N. PLATTE Casper Mtn. 7900 5.2 7.4 70 4.1 9.0 46 Laprele Creek 8375 4.1 5.3 77 5.7 7.4 77 Reno Hill 8400 6.4 7.6 84 7.4 8.8 84 Windy Peak 7900 3.9 4.1 95 5.4 6.3 86 ----- ----- Basin Index (%) 80 72 LARAMIE RIVER Brooklyn Lake 10240 14.5 11.9 122 15.3 12.6 121 Cinnabar Park 9574 14.6 12.9 113 17.2 15.6 110 Crow Creek 8330 1.8 5.7 32 7.2 6.4 112 Deadman Hill 10220 11.9 9.7 123 11.7 10.0 117 Rawah 9020 6.7 6.0 112 9.7 8.9 109 Roach 9700 8.6 9.8 88 11.2 11.6 97 ----- ----- Basin Index (%) 104 111 S. PLATTE Black Mountain 8920 5.7 -M * 8.4 -M * Crow Creek 8330 1.8 5.7 32 7.2 6.4 112 Deadman Hill 10220 11.9 9.7 123 11.7 10.0 117 ----- ----- Basin Index (%) 89 115 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 6.8 50 6.3 9.5 66 Divide Peak 8880 8.6 12.0 72 11.9 13.4 89 Elk River 8700 8.3 10.7 78 9.8 12.4 79 Little Snake River 8915 11.4 15.1 75 16.7 20.1 83 Old Battle 10000 14.8 18.8 79 14.3 21.9 65 Sage Creek Basin 7850 5.8 8.1 72 7.2 9.6 75 Sandstone RS 8150 5.2 7.8 67 5.3 11.7 45 Whiskey Park 8950 12.4 15.4 81 15.3 17.3 88 ----- ----- Basin Index (%) 74 75 UPPER GREEN RIVER Big Sandy Opening 9080 8.2 7.9 104 8.4 8.2 102 Blind Bull Sum 8650 19.4 13.4 145 12.1 12.6 96 East Rim Divide 7930 7.1 6.7 106 7.2 7.5 96 Elkhart Park G.S. 9400 7.5 7.3 103 7.5 8.3 90 Gros Ventre Summit 8750 9.6 8.2 117 9.0 8.0 112 Gunsight Pass 9820 9.5 8.1 117 9.8 8.7 113 Kendall R.S. 7740 8.9 7.8 114 9.7 9.0 108 Loomis Park 8240 9.8 9.3 105 10.6 11.0 96 New Fork Lake 8340 7.2 6.7 107 6.5 6.9 94 Pocket Creek 9360 6.3 -M * 5.7 -M * Snider Basin 8060 7.4 7.3 101 9.2 9.0 102 Spring Creek Divide 9000 15.8 13.8 114 15.4 15.0 103 Triple Peak 8500 15.9 12.7 125 17.9 15.6 115 ----- ----- Basin Index (%) 116 103 LOWER GREEN RIVER Blacks Fork Jct 8869 4.6 -M * 6.0 -M * Buck Pasture 9632 7.3 -M * 8.1 -M * EF Blacks Fork GS 9360 4.4 -M * 4.4 -M * Hams Fork 7840 5.2 6.9 75 5.7 7.1 80 Hewinta 9500 5.1 5.3 96 7.1 8.5 84 Hickerson Park 9122 4.3 3.7 116 3.9 6.0 65 Hole-in-Rock 9168 3.9 3.9 100 4.4 5.6 79 Indian Creek 9425 12.6 14.2 89 9.7 13.7 71 Kelley R.S. 8180 7.7 8.8 88 8.9 11.3 79 Spirit Lk 10235 4.8 -M * 5.7 -M * Steel Creek Park 10158 8.5 8.4 101 8.6 9.7 89 ----- ----- Basin Index (%) 92 78 UPPER BEAR RIVER Bear River RS 8777 5.3 -M * 6.9 -M * Bug Lake 7987 9.5 10.1 94 10.3 12.2 84 Burts Miller Ranch 8000 4.2 -M * 4.4 -M * Chalk Creek #1 9171 9.0 13.2 68 9.9 15.4 64 Hayden Fork 9130 7.5 8.4 89 9.4 12.8 73 Kelley R.S. 8180 7.7 8.8 88 8.9 11.3 79 Lily Lake 9133 6.8 7.3 93 7.2 10.5 69 Monte Cristo 8932 12.3 15.5 79 12.3 16.0 77 Salt River Summit 7640 6.2 7.5 83 8.1 10.4 78 ----- ----- Basin Index (%) 83 75 ----------------------------------------------------------------------------- -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.